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Tytuł:
Synthesis of heaviest nuclei and heaviest chemical elements
Autorzy:
Sobiczewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/146684.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
heaviest nuclei
heaviest chemical elements
nuclear reactions
alfa-decay energy
alfa-decay half-life
alfa-decay genetic chains
Opis:
Studies of the heaviest nuclei and heaviest chemical elements are shortly described. Methods of synthesis and identification of these nuclei are discussed. Some details of the studies are illustrated on the example of the nucleus 277Cn, the isotope of the element 112 (copernicium) the discovery of which has been recently approved by IUPAC. General results of the research on superheavy nuclei (atomic number Z = 104–118), synthesized within the period from 1969 (discovery of rutherfordium, Z = 104) up to the present are outlined.
Źródło:
Nukleonika; 2011, 56, 3; 212-216
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences in the relationship between bacterial count decay and storage time in Antarctic freshwater samples
Autorzy:
Allende, Luz
Powiązania:
https://bibliotekanauki.pl/articles/2051915.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
bacterioplankton
count decay
storage
Źródło:
Polish Polar Research; 2006, 27, 1; 63-69
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Mechanical Energy Loss in Steady Flow by Means of Dissipation Power
Autorzy:
Artichowicz, W.
Sawicki, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/241274.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
energy decay rate
energy loss
Opis:
When systems of simple geometry like pipes or regular channels are considered, the mechanical energy loss of the fluid flow can be expressed by local and longitudinal empirical energy loss coefficients. However, in the case of large spatially distributed objects, there are no simple approaches to this task. In practice, general recommendations addressing different types of objects are used, but they usually provide very coarse estimates of energy loss. In this work, a new methodology for determination of mechanical energy loss in steady flowis proposed. This methodology is based on the observation that the magnitude of the power of energy dissipation in turbulent flow can be determined using the averaged flow velocity and turbulent viscosity coefficient. To highlight this possibility, an analysis of the magnitudes of the power of the main and fluctuating components of turbulent flow is presented. The correctness of the method is verified using an example of laminar and turbulent flows in a circular pipe. The results obtained show clearly that the proposed methodology can be used for mechanical energy loss determination in flow objects. This methodology can be used as a basis for mechanical energy loss determination in different types of flow objects.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2017, 64, 2; 73-85
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Poet of Decay and Psychic Entropy: The Intersection of Surrealism and Science in J. G. Ballard’s Fiction
Autorzy:
Tereszewski, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2013227.pdf
Data publikacji:
2021
Wydawca:
Komisja Nauk Filologicznych Polskiej Akademii Nauk, Oddział we Wrocławiu
Tematy:
J
G
Ballard
surrealism
entropy
decay
Opis:
Images of decay, both psychological and physical, permeate much of J.G. Ballard’s fiction, creating in effect a unique aesthetic that has acquired the eponymous description “ballardian.” This imagery, stemming from the surrealist tradition, is more than aesthetic affectation; it is, as this article argues, the manifestation of an eschatological theme underlying much of New Wave science fiction. This article also addresses how scientific discourse, especially references to entropy, and surrealist aesthetics intersect in his novels (High-Rise and The Drowned World) to provide a metaphor for Ballard’s frequent use of decay imagery. Though the surrealist component of his imagination has been well documented, what still invites closer scrutiny are the ideological assumptions linking Ballard’s incorporation of surrealism with the work of other surrealists and the way Ballard develops this theme for his own purposes.
Źródło:
Academic Journal of Modern Philology; 2021, 14; 337-346
2299-7164
2353-3218
Pojawia się w:
Academic Journal of Modern Philology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recenzja książki Iwony E. Rusek, Pragnienie-Symbol-Mit. Studium o „Próchnie” Wacława Berenta
Iwona E. Rusek, “Determination, Symbol, Myth. Study of the Wacław Berent’s novel Próchno (Decay)”
Autorzy:
Orczykowska, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/545265.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Gdański. Wydział Filologiczny
Tematy:
Waclaw Berent
„Decay”
Young Poland
Schopenhauer
Opis:
The main purpose of the article is to analyze a book Determination, Symbol, Myth. Study of the Wacław Berent’s novel “Próchno” (“Decay”) written by Iwona E. Rusek.
Źródło:
Jednak Książki. Gdańskie Czasopismo Humanistyczne; 2015, 4; 287-296
2353-4699
Pojawia się w:
Jednak Książki. Gdańskie Czasopismo Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New species of corticioid fungi (Basidiomycota) for Poland found in Białowieża Primeval Forest in 2018-2020
Autorzy:
Yurchenko, Eugene
Wołkowycki, Marek
Powiązania:
https://bibliotekanauki.pl/articles/11881008.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Aphyllophorales
geography
micromorphology
Polyporales
wood decay basidiomycetes
Opis:
Eight new species of fungi (Acanthobasidium norvegicum, Amylocorticium laceratum, Hyphoderma transiens, Odonticium septocystidiatum, Phlebia cretacea, Ph. subulata, Steccherinum albidum, and Tubulicrinis calothrix) were identified for Poland after a study of collections from large forests situated in the northeast part of the country. Leptosporomyces fuscostratus was confirmed for Polish mycobiota. Main diagnostic features, natural range, substratum preferences, and taxonomic position of these species are discussed. Color images of basidiomata for 9 species, line drawings of microscopic structures for 6 species, and scanning electron microscopy images of important microstructures for 4 species are provided.
Źródło:
Acta Mycologica; 2022, 57; 577
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pathways of tRNA turnover in eukaryotic cells
Autorzy:
Turowski, T. W.
Powiązania:
https://bibliotekanauki.pl/articles/115770.pdf
Data publikacji:
2011
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
tRNA turnover
rapid tRNA decay
polymerase III
Opis:
Cell ability to control amount of a transfer RNA is one of the ways to regulate rate of protein synthesis. Because 80–90% dry mass of cells are proteins, the level of translation is determinant to the cell growth. Growth of cells is a key question in tumors therapy and biotechnology. tRNA turnover consist of a three pathways described in a last few years: exosome and TRAMP complex dependent pathway in nucleus, directed to hypomodified or affected tRNA; rapid tRNA decay pathway involving two 5’–3’ exonucleases Rat1 and Xrn1, proposed to occur in nucleus and cytoplasm; stress-activated endonucleolytic cleavage to tRNA halves pathway, founded in cytoplasm with a clear role to direct regulation of translation by tRNA half-molecules inhibition.
Źródło:
Challenges of Modern Technology; 2011, 2, 2; 63-65
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
General decay rate of a weakly dissipative viscoelastic equation with a general damping
Autorzy:
Khaleel, Anaya
Messaoudi, Salim A
Powiązania:
https://bibliotekanauki.pl/articles/1397338.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
general decay
relaxation function
viscoelastic
weakly dissipative equation
Opis:
In this paper, we consider a weakly dissipative viscoelastic equation with a nonlinear damping. A general decay rate is proved for a wide class of relaxation functions. To support our theoretical findings, some numerical results are provided.
Źródło:
Opuscula Mathematica; 2020, 40, 6; 647-666
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uniform energy decay rates of hyperbolic equations with nonlinear boundary and interior dissipation
Autorzy:
Lasiecka, I.
Triggiani, R.
Powiązania:
https://bibliotekanauki.pl/articles/970305.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
non-linear hyperbolic equations
uniform energy decay rates
Opis:
We consider the problem of uniform stabilization of nonlinear hyperbolic equations, epitomized by the following three canonical dynamics: (1) the wave equation in the natural state space L2(Ω) x H^-1(Ω), under nonlinear (and non-local) boundary dissipation in the Dirichlet B.C., as well as nonlinear internal damping; (2) a corresponding Kirchhoff equation in the natural state space [wzór), under nonlinear boundary dissipation in the 'moment' B.C. as well as nonlinear internal damping; (3) the system of dynamic elasticity corresponding to (1). All three dynamics possess a strong, hard-to-show 'boundary → boundary' regularity property, which was proved, also by invoking a micro-local argument, in Lasiecka and Triggiani (2004, 2008). This is by no means a general property of hyperbolic or hyperbolic-like dynamics (Lasiecka and Triggiani, 2003, 2008). The present paper, as a continuation of Lasiecka and Triggiani (2008), seeks to take advantage of this strong regularity property in the case of those PDE dynamics where it holds true. Thus, under the above boundary → boundary regularity, as well as exact controllability of the corresponding linear model, uniform stabilization of nonlinear models is obtained under minimal nonlinear assumptions, provided that a corresponding unique continuation property holds true. The treatment of the present paper is cast in the abstract setting (Lasiecka, 1989, 2001; Lasiecka and Triggiani, 2000, Ch. 7, 2003, 2008), which is proper for these hyperbolic dynamics and recovers the results of Lasiecka and Triggiani (2003, 2008) in the absence of the nonlinear interior damping, in particular in the linear case.
Źródło:
Control and Cybernetics; 2008, 37, 4; 935-969
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Terrigenous organic matter and formation of siderite in the Bathonian Ore-Bearing Clay Formation at Gnaszyn, Poland : a petrochemical study
Autorzy:
Lis, Kacper
Wojtulek, Piotr
Lis, Grzegorz
Jelonek, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/2171817.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
organic matter
kerogen
siderite concretions
microbial decay
Jurassic
Opis:
The Bathonian Ore-Bearing Clay Formation, outcropping in the Gnaszyn open-pit mine at Częstochowa (Poland), includes several horizons of abundant iron carbonate concretions. The cores of the concretionary bodies commonly contain organic matter (OM), dominated by fragments of wood. These organic particles usually display well-preserved primary structures and occur rarely as more deformed and/or completely degraded fragments. Their original structures are frequently replaced by or filled with secondary mineralization, mostly represented by pyrite. The maceral composition of the OM of the wood fragments is dominated by huminite with subordinate inertinite and resinite. Vitrinite reflectance analyses revealed values lower than 0.45%. The total organic carbon content (TOC) displayed variable results between 2% and 18%. Rock-Eval analyses revealed low amounts of hydrogen (< 45 mg HC/g TOC) and relatively high amounts of oxygen (up to 136 mg CO2/g TOC). Analysed samples contained small quantities of free hydrocarbons (S1 peak < 0.26 mg HC/g rock) as well as hydrocarbons, generated during pyrolysis (S2 peak < 7.05 mg HC/g rock). These features are characteristic for immature type IV kerogen of terrigenous origin. However, the maceral composition and frequent occurrence of siderite affecting the Rock-Eval parameters may indicate that the original kerogen belonged to type III. According to previous authors, the OM of terrigenous origin was delivered to well-oxygenated water of the palaeo-basin in the Częstochowa area. The present data indicate that intensive biodegradation of this OM at shallow burial depleted the oxygen supply within the sediment, driving the pore water into dys- or anoxic conditions. The activity of microorganisms in reducing iron and/or sulphates became the dominant biodegradation reaction, introducing Fe2+ and HCO3- ions into the system. Negative δ13C values in the cortex of the concretions analysed indicate that the bicarbonate consumed in siderite precipitation was supplied by this microbial activity. The reducing microenvironments developed in the sediment and wood fragments acted as nucleation sites for siderite precipitation.
Źródło:
Annales Societatis Geologorum Poloniae; 2022, 92, 3; 295--312
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global solutions for a nonlinear Kirchhoff type equation with viscosity
Autorzy:
Lapa, Eugenio Cabanillas
Powiązania:
https://bibliotekanauki.pl/articles/29519609.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
global solutions
nonlinear Kirchhoff type problem
exponential decay
Opis:
In this paper we consider the existence and asymptotic behavior of solutions of the following nonlinear Kirchhoff type problem $ u_{t t} - M ( \int_\Omega | \nabla u |^2 dx ) \Delta u - \delta \Delta u_t = \mu | u |^{p-2} u $ in $ \Omega \times ]0, \infty [ $ where $ M(s) = $ ⎧ $ a - bs $ for $ s \in [0, a/b [$, ⎨ ⎩ $ 0, $ for $ s \in [ a/b, + \infty ] $. If the initial energy is appropriately small, we derive the global existence theorem and its exponential decay.
Źródło:
Opuscula Mathematica; 2023, 43, 5; 689-701
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of excitation migration on the decay of excited states via electron transfer to acceptors
Autorzy:
Gutman, M.
Hilczer, M.
Tachiya, M.
Powiązania:
https://bibliotekanauki.pl/articles/147856.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron transfer
energy migration
simulation
fluorescence decay
polymer matrix
Opis:
Simulation of fluorescence quenching due to electron transfer from a photoexcited donor to an acceptor, in a rigid matrix has been performed. The model assumes competition between processes of the electron transfer and the resonant excitation energy transfer among donors. Electron and energy transfers are described in terms of the Marcus and the Förster theories, respectively. Dependence of the fluorescence quenching on the donor concentration and on the parameters of the Marcus and Förster equations has been investigated at a fixed acceptor concentration. Fluorescence decay curves calculated for various concentrations of donors have been compared with experimental decays.
Źródło:
Nukleonika; 2005, 50,suppl.2; 39-43
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and decay of finite energy solutions for semilinear dissipative wave equations in time-dependent domains
Autorzy:
Nakao, Mitsuhiro
Powiązania:
https://bibliotekanauki.pl/articles/1397374.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
energy decay
global existence
semilinear wave equation
noncylindrical domains
Opis:
We consider the initial-boundary value problem for semilinear dissipative wave equations in noncylindrical domain $\cup_{0 \leq t \leq \infty} \Omega(t) \times \{t\} \subset \mathbb{R}^N \times \mathbb{R}$. We are interested in finite energy solution. We derive an exponential decay of the energy in the case Ω(t) is bounded in $\mathbb{R}^N$ and the estimate $\int_0^\infty E(t)dt \leq C(E(0), ||u(0)||) < \infty $ in the case Ω (t) is unbounded. Existence and uniqueness of finite energy solution are also proved.
Źródło:
Opuscula Mathematica; 2020, 40, 6; 725-736
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Opowiadam, więc jestem
I tell, therefore I am
Autorzy:
Romaniszyn-Ziomek, Lidia
Powiązania:
https://bibliotekanauki.pl/articles/29520420.pdf
Data publikacji:
2023-07-21
Wydawca:
Uniwersytet Bielsko-Bialski
Tematy:
decay
narration
narrator
tale
prose
rozpad
narracja
opowieść
proza
Opis:
I tell, therefore I am [Review: Anna Węgrzyniak, W świecie, który wciąż się rozpada. Lektury prozy XX i XXI wieku (In a World that Continues to Fall Apart. Reading Prose of the 20th and 21st Century), Wydawnictwo Naukowe ATH, Bielsko-Biała 2019, pp. 215.] The present text is a review of a monograph by the eminent (recently deceased) scholar professor Anna Węgrzyniak. The book In a World that Continues to Fall Apart. Reading Prose of the 20th and 21st Century is a collection of essays divided into three sections, and each of those concerns texts by writers from various generations. They are connected by the category of decay, but the centre of this brilliantly spun yarn is taken up by a subject connecting all of the broken worlds – a narrator, a teller, building his identity through a tale and showing the diverse faces of history, humanity, individual existences. “To live, one has to tell stories” – writes Węgrzyniak in the introduction (p. 9). This is why she herself focuses on the tale and on careful reading. Thus she creates a captivating, very approachable history of reading and of perception of texts, combined with scholarly reflection.
Źródło:
Świat i Słowo; 2023, 40, 1; 325-331
1731-3317
Pojawia się w:
Świat i Słowo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trophic Abilities of Trametes Gibbosa (Polyporales, Basidiomycota) With Respect to The Wood of Fagus Sylvatica
Autorzy:
Piętka, Jacek
Szczepkowski, Andrzej
Ronikier, Michał
Saługa, Marta
Powiązania:
https://bibliotekanauki.pl/articles/27323534.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
wood decay fungi
white rot
fungal inoculation
molecular identification
Opis:
Trametes gibbosa is a widespread polypore fungus occurring throughout Europe and Asia. It is considered a saprotroph occasionally exhibiting parasitic activity. The aims of the present experimental work were to: (1) determine the ability of T. gibbosa pure culture to decompose beech wood under laboratory conditions, (2) test the trophic abilities of T. gibbosa by comparative analysis of the development of its mycelium inoculated into the stems of living beech trees and into beech rollers (stem segments – dead substrate). The laboratory wood decay experiment revealed considerable weight loss of the beech wood samples exposed to T. gibbosa (32.7% after 120 days). Identification of the mycelium used for inoculation in natural forest conditions was done by morphological analysis of the cultures and molecular barcoding. Attempts to recover T. gibbosa mycelium were made after two and eight years for the living trees, and after two years for the rollers. While T. gibbosa could not be reisolated from the inoculated beech trees, basidiomata were observed on the beech rollers, and genetically verified T. gibbosa mycelium was extracted from them. We conclude that T. gibbosa exhibits strong saprotrophic inclinations.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2023, 66, 211; Art. no. 1644-3985.413.08
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass spectrometric analysis of head-to-tail connected cyclic peptides.
Autorzy:
Macht, Marcus
Pelzing, Matthias
Palloch, Petra
Sauerland, Volker
Volz, Jürgen
Powiązania:
https://bibliotekanauki.pl/articles/1044055.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
electrospray
post source decay
MALDI
mass spectrometry
peptide sequencing
Opis:
Tandem mass spectrometry is an extremly useful tool for high sensitive sequence identification of peptides. In the case of cyclic peptides fragmentation can easily be performed for sequence analysis. However, analysis is usually tedious due to the lack of a defined beginning and end of the sequence. Since cyclic peptides are a highly interesting class of compounds especially for the pharmaceutical industry, ways have to be found to identify their structures. In this work we demonstrate how software and dedicated analytical strategies can be used for detailed analysis of these substances.
Źródło:
Acta Biochimica Polonica; 2001, 48, 4; 1109-1112
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction of heavy aircraft wakes
Wzajemne oddziaływanie wirów zaskrzydłowych dużych samolotów
Autorzy:
Bugała, P.
Dziubiński, A.
Powiązania:
https://bibliotekanauki.pl/articles/213035.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
CFD
vortex decay
vortex interaction
rozpad wirów
oddziaływanie wirów
Opis:
In the next few years the problem of heavy aircraft wakes may increase on the account of continuous air transport growth. However, it can be noticed that even today the number of accidents resulting from an interaction with wakes is increasing. That is the reason why methods of wake vortex description should be searched for. The aim of this study is to analyze interaction of example aircraft wakes. In this paper the characteristics of vortex wake behind three-dimensional wing arc presented. It shows how a separation between aircraft affects the decay of vortex. Two- and three-dimensional calculations were performed using commercial RANS code. The following cases have been taken into consideration: flow past a full commercial aircraft, three-dimensional flow over the simplified wing and a two-dimensional analysis of vortex decay caused by the landing aircraft, including the separation effect. For all these cases a CFD simulation of the aircraft wakes was conducted. One of the main outcome of this work is a confirmation that the interaction between wakes consists of spreading out and lifting wakes. The achieved results show that the two-dimensional simulation is a sufficient tool for a preliminary analysis of wake vortices. Conclusions from this analysis can be used by the managements of busy international airports to enhance safety.
W ciągu kilku kolejnych lat, problem wirów powstających za ciężkimi samolotami, może wzrastać z powodu rozwoju ruchu lotniczego. Jednak już dziś można zauważyć rosnącą liczbę wypadków spowodowanych interferencją z wirami. To jest powód, dla którego metody opisu wirów powinny stać się przedmiotem badań. Celem niniejszej pracy jest analiza interferencji wirów powstających za wybranym samolotem pasażerskim. W artykule zaprezentowano charakterystykę zaburzenia powstającego za trójwymiarowym skrzydłem. Niniejsza praca ukazuje wpływ separacji między samolotami na rozpad wirów. Dwu- i trójwymiarowe obliczenia zostały wykonane przy użyciu komercyjnego kodu RANS. Następujące przypadki zostały wzięte pod uwagę: przepływ za pełno wy miarowym samolotem komercyjnym, trójwymiarowa analiza wirów za uproszczonym skrzydłem oraz dwuwymiarowa symulacja rozpadu wirów za lądującymi samolotami z uwzględnieniem separacji. Dla wszystkich tych przypadków zostały przeprowadzone analizy CFD. Jednym z najistotniejszych rezultatów pracy jest potwierdzenie, że interakcja pomiędzy zaburzeniami polega na rozchodzeniu i unoszeniu się wirów. Uzyskane wyniki pokazują, że obliczenia dwuwymiarowe są wystarczające do wstępnej analizy wirów. Wnioski tych analiz mogą być wykorzystane przez zarządy zatłoczonych, międzynarodowych lotnisk do utrzymania odpowiedniego poziomu bezpieczeństwa.
Źródło:
Prace Instytutu Lotnictwa; 2016, 4 (245); 309-320
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Was halten die Deutschen von ihrer eigenen Sprache?
Autorzy:
Stickel, Gerhard
Powiązania:
https://bibliotekanauki.pl/articles/700271.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Germanistów Polskich
Tematy:
language attitudes, present German language, language decay, linguistic interest
Opis:
Since the eighties of the last century, the Institut für Deutsche Sprache (Institute forthe German Language) explored in various ways the attitudes of the German populationtowards the national language in Germany. Aft er limited studies without statisticalrelevance, two representative surveys were conducted in 1997/98 and 2008/09. Th equestions asked concerned attitudes toward recent developments of the language, the regionalvariance of German, despecially the East- and West-Geman variants, and towardsforeign languages inside and outside of the country. Th e major statitical results are presentedand discussed.
Źródło:
Zeitschrift des Verbandes Polnischer Germanisten; 2013, 2, 1
2353-656X
2353-4893
Pojawia się w:
Zeitschrift des Verbandes Polnischer Germanisten
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strategia ożywiania centrów dużych miast amerykańskich
Strategy of downtown revitalization in american large cities
Autorzy:
Litwińska, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/1861373.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Opolski
Tematy:
decay of downtowns
suburbanization
revitalization
upadek centrów miast
suburbanizacja
rewitalizacja
Opis:
Do upadku centrów miast amerykańskich przyczyniła się przede wszystkim suburbanizacja i pojawienie sie wielkich hipermarketów poza granicami miast. Odpływ bogatszych mieszkańców na suburbia spowodował zmniejszenie wpływów podatkowych i w rezultacie obniżenie poziomu usług publicznych. Również wiele miejsc pracy lokowano poza granicami miast. Celem artykułu jest przedstawienie strategii ożywiania miast w Stanach Zjednoczonych. Rewitalizacja rozpoczyna się od organizowania przestrzeni publicznych i wprowadzania funkcji rozrywkowo-kulturalnych w centrum. Następnie pojawia się potrzeba mieszkań na wynajem, po pewnym czasie – mieszkań własnościowych i wreszcie powierzchni biurowych. Udana rewitalizacja jest procesem długofalowym, który wymaga dużych nakładów finansowych oraz partnerstwa publiczno-prywatnego.
The decay of downtowns was primarily contributed by the suburbanization and the emergence of large shopping malls beyond borders of the cities. The migration of affluent residents to the suburbs has caused a reduction of tax revenue. In consequence the level of public services has diminished. Also many work places were located outside the cities. The purpose of the paper is to present the strategy of urban redevelopment in the U.S. The revitalization starts with organizing public spaces and location of cultural and entertainment activities in the downtown. It is followed by need for rental housing, housing for sale and finally for office spaces. The successful downtown revitalization is the long-term process that requires large financial investments and the private-public partnership.
Źródło:
Studia Miejskie; 2012, 7; 71-79
2543-5302
2082-4793
Pojawia się w:
Studia Miejskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Black cherry (Prunus serotina Ehrh.) colonization by macrofungi in the fourth season of its decline due to different control measures in the Kampinos National Park
Autorzy:
Marciszewska, Katarzyna
Szczepkowski, Andrzej
Otręba, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2041628.pdf
Data publikacji:
2020
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
girdling
invasive plant
macromycetes
sprouting
stump cutting
wood decay fungi
Opis:
The experiment conducted in the Kampinos National Park since 2015 was aimed at assessing the sprouting ability of black cherry (Prunus serotina Ehrh.) in response to different measures of mechanical control and mycobiota colonizing the dying trees. Basal cut-stump, cutting at ca. 1 m above the ground and girdling were performed on 4 terms, two plots and applied to 25 trees, 600 trees in total. Sprouts were removed every 8 weeks since the initial treatment for 4 consecutive growing seasons, except winter-treated trees. At the end of the fourth season of control, 515 out of 600 trees were dead (86%): 81% on Lipków and 90% on Sieraków plot. Among 18 experiment variants with sprouts removal, 17 showed more than 80% of dead trees. The lowest, 76% share, concerned summer cut-stump at the base of the tree. For winter measures, the share of dead trees was lower in all cases and ranged from 28% to 64% proving that sprouts removal contributes to the drop of sprouting strength and quicker dying of the trees. Almost 80% of trees showed sporocarps that represented 51 taxa of macrofungi in total, including 6 Ascomycota and 45 Basidiomycota. The group of six most frequently encountered fungi includes: Hyphoderma setigerum, Bjerkandera adusta, Peniophora cinerea, Armillaria ostoyae, Nectria cinnabarina, Stereum hirsutum. Both plots had similar share of black cherry individuals with sporocarps of macrofungi, that is, 81% and 78% for Sieraków and Lipków respectively. The share of colonized trees and the number of reported macrofungal taxa increased significantly compared to the year following the treatment. In addition, the composition of macrofungi changed with the progressing dying of trees. These results broaden the knowledge about macroscopic fungi colonising and living on black cherry within its secondary range of distribution. Moreover, one macrofungus and two microfungi new for KNP are reported.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2020, 62, 2; 78-87
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polyadenylation and decay of 26S rRNA as part of Nicotiana tabacum response to cadmium
Autorzy:
Lewandowska, Małgorzata
Borcz, Barbara
Kamińska, Jolanta
Wawrzyński, Adam
Sirko, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1040862.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
polyadenylation of rRNA
RNA decay
programmed cell death
cadmium
tobacco
Opis:
In contrast to mRNAs, ribosomal RNAs are generally not considered to be polyadenylated. Only a few recent reports describe non-abundant polyadenylated rRNA-related transcripts that have been detected and characterized in yeast and in human cells. Here we depict the phenomenon of 26S rRNA polyadenylation and degradation that was observed in shoots of Nicotiana tabaccum plants grown in the presence of cadmium. Fragments corresponding to 26S rRNA were identified using suppression subtractive hybridization during screening for genes induced in tobacco plants upon a three-week exposure to 15 µM cadmium chloride. Extracts prepared from the above-ground tissues of cadmium-treated tobacco plants were supposed to contain exclusively polyadenylated mRNAs. Surprisingly, numerous polyadenylated fragments matching parts of 26S rRNA were identified and their presence was confirmed by Northern blot and cDNA amplification techniques. To our knowledge this is the first report on rRNA polyadenylation in plants.
Źródło:
Acta Biochimica Polonica; 2007, 54, 4; 747-755
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sufficiency of the Corrosiveness of Petroleum Oils on the Decay of Metals
Autorzy:
Aluvihara, Suresh
Premachandra, Jagath K.
Powiązania:
https://bibliotekanauki.pl/articles/1046559.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Corrosion
Corrosiveness
Decay
Ferrous metals
Hardness
Petroleum oils
Weight loss
Opis:
Petroleum oils are the limited earth resources in which the variety of their chemical compositions are mostly composed of hydrocarbons and some trace compounds. Oils also contain various corrosive compounds. In the existing research, the major objective was the investigations of the impacts of such corrosive compounds within two different types of petroleum oils on the corrosion rates of seven different types of ferrous metals. As the methodology, the major corrosive properties of two different types of crude oils and chemical compositions of seven different types of metal were measured by standard instruments and methods. The corrosion rates of prepared metal coupons from seven different types of metals were determined by the relative weight loss method after immersion time periods separately in both crude oils in order of 15, 30 and 45 days, while qualitatively analyzing the corroded metal surfaces by optical microscope. In addition, the decayed ferrous and copper concentrations from metals into crude oils after immersion were measured by atomic absorption spectroscopy, while the status of the initial hardness of metal coupons were measured by the Vicker’s hardness tester. According to the obtained results, we saw higher corrosive stability from stainless steels which have chemical compositions of at least 12% of chromium with sufficient amounts of nickel, while in other steels, we noted relatively higher progress of the corrosion process regarding salts at lower temperatures, formations of FeS, Fe2O3, corrosion cracks and pits on the corrosion metal surfaces, significant decays of ferrous and copper from some metals into crude oils and slight reductions of the initial hardness of most metal types due to the corrosion.
Źródło:
World Scientific News; 2019, 137; 145-165
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Famae petitor. Lucan’s Portrayal of Pompey
Autorzy:
Pypłacz, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1046783.pdf
Data publikacji:
2014-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Pompey
Lucan
irony
comic
epic
Roman Republic
decay
caricature
hero
Opis:
In spite of the fact that Lucan’s sympathies are apparently with the Republicans, his attitude to Pompey, which emerges from the Pharsalia, turns out to be rather critical. Moreover, this criticism actually comes very close to ridicule. Lucan depicts Pompey as a senile and narcissistic leader who dwells on his past success and lives in the world of his own fantasies. Trapped in the vicious circle of his delusions of grandeur, he is rather grotesque than majestic. The harder he tries to enhance his public image, the more pathetic he becomes both in the eyes of his friends and in those of his enemies. The effects of his efforts are, therefore, quite contrary to their purpose. On the one hand, the figure of the senile and deluded Pompey is the caricature of the decaying Roman Republic, whose degeneracy it obviously mirrors. On the other hand, however, Lucan’s grotesque anti-hero is the exact opposite of archetypal epic characters such as Virgil’s Aeneas. Willing yet unable to emulate his literary predecessors, he functions as the caricature of the literary paradigm of a standard epic hero.
Źródło:
Symbolae Philologorum Posnaniensium Graecae et Latinae; 2014, 24, 2; 97-118
0302-7384
Pojawia się w:
Symbolae Philologorum Posnaniensium Graecae et Latinae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gry komputerowe jako dziedzictwo kulturowe
Computer games as cultural heritage
Autorzy:
Garda, Maria B
Powiązania:
https://bibliotekanauki.pl/articles/973192.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
computer games preservation
cultural heritage
digital decay
original experience
retrogaming
Opis:
The aim of the article is to discuss the challenges of computer games preservation as a cultural heritage, focusing on the Polish perspective. Computer games are predominantly perceived as ‘new media’, despite the fact that their history dates back to the mid-20th century. It is important to understand that not only the early computer games are already ‘old media’ but all the digital games are. They may be perceived as ‘dying media’ vulnerable to unprecedented obsolescence. The article explores the consequences of digital decay and the notion of original experience in the context of conservation strategies. It suggests that there is still a need for a more conscious inclusion of computer games within the agenda of the Polish heritage institutions.
Źródło:
Replay. The Polish Journal of Game Studies; 2014, 01
2391-8551
2449-8394
Pojawia się w:
Replay. The Polish Journal of Game Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Populism and Political Elites
Autorzy:
Pakulski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/561456.pdf
Data publikacji:
2018-12-31
Wydawca:
Collegium Civitas
Tematy:
populism
populist movements
leadership
antielitism
demagogy
elite degeneration
political decay
Opis:
Contemporary populist movements – outlined as an ideal type (anti-elitism, demagogy, “citizenism”, conspiratorial views, and embrace of simple solutions) – are analysed according to the Weberian approach that focuses on leadership groups: their styles, structures, rhetorics, and the relationship with followers. Populist leaders emerge – and populist movements appear – at the times of rapid social change and the accompanying crises. But they also herald the decline of trust and moderation among the leaders and activists. This decline results in deep divisions and antagonisms within political elites which is reflected in populist styles rhetoric. Populist ascendancy is ac-companied by degeneration of political elites and political decay, that is weakening the core political institutions of the state, rule of law, and democratic.
Źródło:
Zoon Politikon; 2018, 9 Special Issue; 1-16
2543-408X
Pojawia się w:
Zoon Politikon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Demarcation energy properties of regenerated fiber Bragg grating sensors in few-mode fibers
Autorzy:
Mohd Nazal, N. A.
Lai, M.-H.
Lim, K.-S.
Gunawardena, D. S.
Chong, W.-Y.
Yang, H.-Z.
Ahmad, H.
Powiązania:
https://bibliotekanauki.pl/articles/174756.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
regenerated fiber Bragg grating
thermal regeneration
thermal decay
few-mode fibers
Opis:
In this work, thermal regeneration of fiber Bragg gratings inscribed in single-mode fibers, two-mode step index fibers and four-mode step index fibers is performed, where the single-mode fibers are used as the reference in the analysis. Specifically, we investigate the behavior of the thermal decay, recovery and eventually the permanent erasure of the gratings in the temperature range from 25 to 1300°C. In the domain of demarcation energy, the thermal responses of the gratings can be normalized and they share similar characteristic curves despite the different temperature ramping rates used in the annealing treatment. It is found that the demarcation energy at the regeneration point and the attempt-to-escape frequency for each grating can be associated with the confinement factors of the fibers. The finding in this work has provided a new insight in the manufacture of regenerated fiber Bragg grating sensors by using few-mode fibers for multiparameter sensing in high temperature environments.
Źródło:
Optica Applicata; 2018, 48, 2; 263-271
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient stability analysis and control of power systems with considering flux decay by energy function approach
Autorzy:
Lu, D.
Zhang, X.
Powiązania:
https://bibliotekanauki.pl/articles/201016.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transient stability
dynamic performance
flux decay
structure preserving models
energy function
Opis:
In this paper, transient stability of power systems with structure preserving models is considered. A Hamiltonian function which can be regarded as a Lyapunov function for the system is proposed. Based on this, the influence of flux decay dynamics, especially during a fault, on transient stability is analyzed. With the increase of load power, the variation of stability boundary in the rotor angle/Eq plane is shown. The Energy-based excitation control, aiming at injecting additional damping into the post-fault system may reduce the critical clearing time (CCT). This can be demonstrated by the comparison of different flux decay dynamics in the fault-on condition, and the reason is illustrated by the relationship between rotor angle/Eq and the stability boundary. An improved control strategy is proposed and applied to increase the CCT. Simulation results verify that improvement is obtained both in transient stability and dynamic performance.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 1; 3-8
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accessibility of public services in districts of Warsaw: a comparative study
Autorzy:
Małachowski, Aleksander
Dąbski, Maciej
Wilk, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/946942.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Socio-economic inequalities
public services
Warsaw
city districts
distance-decay pattern
Opis:
The aim of this work is to verify whether accessibility to public services in city districts of Warsaw, corresponds to real-estate prices. We introduce a new index named the “Urban Services Accessibility Index” (USAI) which compares the availability of public services within districts of a city in three dimensions: access to healthcare, access to education, and availability of public transport. We found that the districts of Śródmieście, Ochota and Żoliborz have the highest apartment prices and USAI values. Warsaw exhibits a clear distance-decay pattern in USAI values which correlates well with average apartment prices. This pattern results from poor development of public services in peripheral city districts (e.g. Bemowo, Białołęka, Wilanów) while the central district of Śródmieście stands out as the unquestionable leader in terms of accessibility to the mentioned services. USAI proved itself to be a robust method in the comparative analysis of city districts’ development.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2020, 24, 3; 176-182
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Decay Times from Noisy Room Responses with Pure-Tone Excitation
Autorzy:
Meissner, M.
Powiązania:
https://bibliotekanauki.pl/articles/177891.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
reverberation
decay times
room response
background noise
coupled rooms
Opis:
Reverberant responses are widely used to characterize acoustic properties of rooms, such as the early decay time (EDT) and the reverberation times T20 and T30. However, in real conditions a sound decay is often deformed by background noise, thus a precise evaluation of decay times from noisy room responses is the main problem. In this paper this issue is examined by means of numerical method where the decay times are estimated from the decay function that has been determined by nonlinear polynomial regression from a pressure envelope obtained via the discrete Hilbert transform. In numerical experiment the room responses were obtained from simulations of a sound decay for two-room coupled system. Calculation results have shown that background noise slightly affects the evaluation of reverberation times T20 and T30 as long as the signal-to-noise ratio (SNR) is not smaller than about 25 and 35 dB, respectively. However, when the SNR is close to about 20 and 30 dB, high overestimation of these times may occur as a result of bending up of the decay curve during the late decay.
Źródło:
Archives of Acoustics; 2013, 38, 1; 47-54
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diversity of wood-inhabiting fungi in woodpecker nest cavities in Southern Poland
Autorzy:
Jankowiak, R.
Ciach, M.
Bilanski, P.
Linnakoski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2196352.pdf
Data publikacji:
2019-06-28
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Basidiomycetes
cavity
wood-inhabiting fungi
decay fungi
woodpecker
nest cavity
Polska
Opis:
Globally, tree-holes are important ecological component of forest and woodlands. Numerous microorganisms rely on cavities, both natural and those excavated by primary cavity nesting birds, mainly by woodpeckers, for their survival and reproduction. However, the fungi occurring in cavities are not well characterized. Specifically, very little is known about the fungal communities inhabiting the woodpecker nest cavities. Therefore, in this study, we investigated the fungal diversity of cavities in southern Poland. The samples were collected from freshly excavated woodpecker nest cavities using a nondestructive method (ND). The spatial distribution of fungal communities within the cavities was evaluated by sampling different parts of a single cavity using a destructive method (D). We detected 598 fungal isolates that included 64 species in three phyla and 16 orders using the ND method. Most of the fungi isolated from the cavities represented the phylum Ascomycota (73.9% of the isolates) with 11 orders, and Microascales was the predominant order (30% of the isolates). The most common species detected was Petriella musispora, which was isolated from 65% of the cavities. A total of 150 isolates (25%) were members of Basidiomycota, with Hymenochaetales being the dominant order (16% of the isolates). The basidiomycetous fungi were isolated from 55% of the cavities. Several taxa closely related to the pathogenic fungi and associated with secondary animal infections were detected in the wood of cavities. We identified different fungal communities in the three cavity parts using the D method. The cavity entrance had more number of species than the middle and bottom parts. The results of this study advanced our current knowledge on the mycobiota in woodpecker nest cavities and provided preliminary evidence for tree cavities being the hotspot for fungal diversity.
Źródło:
Acta Mycologica; 2019, 54, 1; 1126
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zalecenia norm międzynarodowych dotyczące pomiarów parametrów fotometrycznych materiałów fosforescencyjnych
Requirements of standards in part related to measurements of the phosphorescent materials
Autorzy:
Szajna, G.
Powiązania:
https://bibliotekanauki.pl/articles/159776.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
Tematy:
fluorescencja
luminancja
czas wzbudzenia
czas zaniku
phospohrescence
luminance
excitation time
decay time
Opis:
W referacie omówiono w jaki sposób zostały zrealizowane w Laboratorium Fotometrii i Radiometrii GUM wymagania norm w części dotyczącej pomiarów parametrów fotometrycznych materiałów fosforescencyjnych. Przedstawione zostaną wymagane przez normy: rodzaje źródeł światła wzbudzenia, wartości natężenia oświetlenia wzbudzenia oraz czasy wzbudzenia. Szczególny nacisk zostanie położony na podstawowy, z punktu widzenia klasyfikowania materiałów fosforescencyjnych, sposób wzbudzania - wzbudzenie lampą ksenonową. Zaprezentowany zostanie układ do wzbudzenia świecenia oraz stanowisko do pomiaru luminancji materiałów fosforescencyjnych. Dalsza część referatu poświęcona będzie podstawowemu parametrowi fotometrycznemu charakteryzującemu materiały fosforescencyjne jakim jest czas zaniku fosforescencji oraz zmianą w podejściu do niego norm przedmiotowych. Końcowa część referatu to podsumowanie doświadczeń z wieloletnich pomiarów i przedstawienie planów budowy nowego stanowiska pomiarowego do pomiaru niskich wartości luminancji.
In this paper we present the way we have realized requirements of standards in part related to measurements of the phosphorescent materials. The kinds of light sources used for excitation, the values of excitation illuminance and times of excitation are discussed. Special attention is paid to excitation with xenon lamp which is admitted to be basic way in classification of the phosphorescent materials. We present the system used for the excitation of lighting and facility for luminance measurements. Basic photometric parameter which characterizes phosphorescent materials i.e. period of light decay, and change in approach to this parameter shown in relevant standards are discussed. The final part of the paper is recapitulation of experience gathered during many years of work and presentation new facility for measuring of low luminance values to be built in the near future in Photometry and Radiometry Lab of Central Office of Measure.
Źródło:
Prace Instytutu Elektrotechniki; 2012, 255; 125-134
0032-6216
Pojawia się w:
Prace Instytutu Elektrotechniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific properties of a model of thoron and its decay products in indoor atmospheres
Autorzy:
Meisenberg, O.
Tschiersch, J.
Powiązania:
https://bibliotekanauki.pl/articles/148707.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
thoron
220Rn
radon
indoor model
decay products
air exchange
spatial distribution
Opis:
Whereas several models of indoor concentrations of radon and its decay products exist, mod els for the occurrence and spatial distribution of thoron (220Rn) and its decay products are lacking. This study highlights the specific properties of the thoron decay chain and presents their consequences for a thoron model. The short half-life of thoron results in an inhomogene ous spatial distribution, which is determined by diffusive and advective transport. The long half- -life of the decay product 212Pb accounts for a strong influence of air exchange on its overall concentration as well as on its unattached fraction. It could further be predicted that also the unattached part of 212Pb is distributed inhomogeneously. The theoretical structure of a thoron model, which can neglect the most short-lived decay products but must account for the influence of air exchange in a stronger way than it is the case for radon, results from these considerations.
Źródło:
Nukleonika; 2010, 55, 4; 463-469
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Virtual ship’s roll decay test with the use of CFD technique
Autorzy:
Krata, P.
Jachowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/243570.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
sea transport
ship stability
roll simulation
roll decay test
computational fluid dynamics
Opis:
Since safety of navigation is related to the stability performance of a ship, the transverse stability is routinely calculated and measured. One of the crucial experimental approach is a roll decay test. Although, an obtained result of the roll decay test carried out on the full-scale ship needs to be compared to a benchmark enabling an estimation of the relevant stability. Nowadays such a benchmark is just based on the simplified GM-based IMO-recommended formula. This research aims at the more sophisticated method of ship’s natural period of roll estimation and thus her stability assessment. The CFD (computational fluid dynamics) technique is applied and the result of the free roll simulation is compared to the solution of a roll equation. The one degree-of-freedom roll equation is applied with regard to the nonlinear ship righting moment and the nonlinear damping moment obtained according to Ikeda’s method. The six degrees-of-freedom simulation of ship’s roll decay test was carried out by the use of FlowVision code utilizing the Reynolds-averaged Navier–Stokes equation with regard to the turbulent flows based on the eddy viscosity concept. The semi-empirical k-ε turbulence model was applied. Thereby, the CFD-based approach allows to get rid of any assumptions regarding the value of the damping coefficient, which is an advantage over the roll equation based approach.
Źródło:
Journal of KONES; 2016, 23, 2; 215-221
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global solutions to the initial-boundary value problem for the quasilinear viscoelastic equation with a derivative nonlinearity
Autorzy:
Nakao, M.
Powiązania:
https://bibliotekanauki.pl/articles/255382.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
global solutions
energy decay
quasilinear wave equation
Kelvin-Voigt dissipation
derivative nonlinearity
Opis:
We prove the existence and uniqueness of a global decaying solution to the initial boundary value problem for the quasilinear wave equation with Kelvin-Voigt dissipation and a derivative nonlinearity. To derive the required estimates of the solutions we employ a ‘loan’ method and use a difference inequality on the energy.
Źródło:
Opuscula Mathematica; 2014, 34, 3; 569-590
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exponential decay of transient values in discrete-time positive nonlinear systems
Autorzy:
Kaczorek, Tadeusz
Ruszewski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2175100.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
exponential decay
transient value
discrete-time
fractional order
positive
nonlinear
feedback
system
Opis:
The exponential decay of transient values in discrete-time nonlinear standard and fractional orders systems with linear positive linear part and positive feedbacks is investigated. Sufficient conditions for the exponential decay of transient values in this class of positive nonlinear systems are established. A procedure for computation of gains characterizing the class of nonlinear elements are given and illustrated on simple example.
Źródło:
Archives of Control Sciences; 2022, 32, 3; 577--588
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Energy Capacity of the Controlled Landfill from Mohamedia Benslimane by Three Theoretical Methods – Land Gem, IPCC, and TNO
Autorzy:
Oukili, Ahlam Idrissi
Chhiba, Mostafa
Powiązania:
https://bibliotekanauki.pl/articles/2202375.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
controlled landfill
municipal solid waste
biogas
first order decay model
electrical energy
Opis:
The objective of this study was to estimate the content of methane produced and generated by the anaerobic biodegradation of the main organic fraction of municipal solid waste from the controlled landfill of Mohammedia-Benslimane (Morocco) by three theoretical models, based on the first order decay equation: LandGEM, IPCC and TNO. To carry out this study, the quantities of solid waste buried in this landfill since its inauguration in 2012 were used and the composition of the biogas in-situ in 2020 and 2021was determined. The quantities of waste that will be buried in this landfill from 2022 to 2032 were estimated by projection.The results of the analysis of the biogas generated in this controlled landfill in 2020–2021 indicate that it is composed of 59.59% CH4, 38.9% CO2, and 0.14% O2. This result indicates that the waste is in a stable methanogenesis phase. The results obtained by using the three methodologies show that the total volume of CH4 generated during the period 2012–2021 was 32.59 Mm3 according to the IPCC model, 20.95 Mm3 according to the LandGEM model and 20.96 Mm3 according to the TNO model. The total volume of CH4 that will be produced during the period 2022–2032 has been projected to 107.48 Mm3 by the IPCC model, to 76.84 Mm3 by the LandGEM model, while the total volume of CH4 projected under the TNO method will be 67.67 Mm3. The maximum methane production will reach a value of 12.07 Mm3, 9.46 Mm3 and 7.82 Mm3 for the IPCC, LandGEM and TNO models, respectively. In 2021, the volume of methane estimated by the three models is higher than that on-site measurement by a factor of 3.5(IPCC), 2.4 (LandGEM) and 2.3 (TNO). The results clearly indicate that the three models over predict methane generations when compared to the on-site generations. According to the LandGEM methodology, the electricity estimated will reach a maximum value of 33 GWh/year in 2032.The efficient use of methane generated by this controlled landfill as a source of electrical energy in the upcoming years can be an option for the sustainable management of waste.
Źródło:
Journal of Ecological Engineering; 2023, 24, 2; 19--30
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ship nonlinear roll motion identification using artificial neural network
Autorzy:
Mousavi, Seyed Mohamadreza
Khoogar, Ahmad Reza
Ghassemi, Hassan
Powiązania:
https://bibliotekanauki.pl/articles/24202591.pdf
Data publikacji:
2022
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
nonlinear roll motion
dynamic identification
DTMB 5415
roll decay
artificial neural network
Opis:
The solution of the nonlinear equation for a ship’s rotational motion around its longitudinal axis, even with simplifying assumptions, is complicated. This oscillatory motion, which is known as the roll motion, is generated when the ship sails in the waves, and the irregular behavior of the waves causes time-varying dynamics. Calculating the ship’s roll response is possible by determining roll equation coefficients. In the current study, the coefficients were determined from the dynamic response of the ship using a training feed-forward neural network. The training was carried out in two modes: as a free swing in calm water and forced oscillation in irregular waves. The DTMB 5415 vessel was selected as the case study ship. The results of the simulation by the neural network were validated by numerical analysis and model test results.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 72 (144); 65--74
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ograniczenie uciążliwości zapachowej ciśnieniowej sieci kanalizacyjnej z wykorzystaniem odczynnika Fentona
Reducing odor nuisance pressure sewerage system using Fenton’s reagent
Autorzy:
Nowicka, A.
Zieliński, M.
Dębowski, M.
Dudek, M.
Powiązania:
https://bibliotekanauki.pl/articles/401449.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
zagniwanie ścieków
reakcja Fentona
pogłębione utlenianie
wastewater decay
Fenton reaction
deep oxidation
Opis:
Celem opisanych badań było zaproponowanie metody pozwalającej wyeliminować bądź ograniczyć występowanie uciążliwości zapachowej kanalizacji komunalnej obserwowanej przy jednej z ulic w Mławie. W celu eliminacji uciążliwości zapachowej wykorzystano proces pogłębionego utleniania za pomocą odczynnika Fentona. Badania zmierzające do określenia niezbędnej dawki reagentów: PIX oraz perhydrolu wykazały, że zastosowanie najmniejszej testowanej dawki 0,1 g Fe2+/dm3 oraz 0,5 g H2O2/dm3 spowodowało zahamowanie podatności ścieków na zagniwanie.
The aim of this study was to propose a method to eliminate or reduce the occurrence of odor nuisance municipal sewage system located at one of the streets in Mława. In order to eliminate odor nuisance uses advanced oxidation processes. Studies aimed at determining the dose required reagents: PIX and hydrogen peroxide showed that the use of the lowest dose tested of 0,1 g of Fe2+/dm3 and 0,5 g H2O2/dm3 resulted in inhibition susceptibility wastewater rotting.
Źródło:
Inżynieria Ekologiczna; 2016, 48; 174-180
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Energy Method for Elastic Problems With Non-Homogeneous Boundary Conditions
Autorzy:
Quintanilla, R.
Powiązania:
https://bibliotekanauki.pl/articles/907887.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
matematyka
weighted energy method
decay estimates
Navier equations
non-homogeneous boundary conditions
Opis:
In this paper we propose the weighted energy method as a way to study estimates of solutions of boundary-value problems with non-homogeneous boundary conditions in elasticity. First, we use this method to study spatial decay estimates in two-dimensional elasticity when we consider non-homogeneous boundary conditions on the boundary. Some comments in the case of harmonic vibrations are considered as well. We also extend the arguments to a class of three-dimensional problems in a cylinder. A section is devoted to the study of an ill-posed problem. Some remarks are presented in the last section of the paper.In this paper we propose the weighted energy method as a way to study estimates of solutions of boundary-value problems with non-homogeneous boundary conditions in elasticity. First, we use this method to study spatial decay estimates in two-dimensional elasticity when we consider non-homogeneous boundary conditions on the boundary. Some comments in the case of harmonic vibrations are considered as well. We also extend the arguments to a class of three-dimensional problems in a cylinder. A section is devoted to the study of an ill-posed problem. Some remarks are presented in the last section of the paper.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2002, 12, 1; 91-100
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of Reverberant Properties of Enclosures via a Method Employing a Modal Representation of the Room Impulse Response
Autorzy:
Meissner, M.
Powiązania:
https://bibliotekanauki.pl/articles/177946.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
indoor reverberation
room impulse response
modal expansion method
decay times
Opis:
A theoretical method has been presented to describe sound decay in enclosures and simulate the room impulse response (RIR) employed for prediction of the indoor reverberation characteristics. The method was based on a solution of wave equation with the form of a series whose time-decaying components represent responses of acoustic modes to an impulse sound source. For small sound absorption on room walls this solution was found by means of the method of variation of parameters. A decay function was computed via the time-reverse integration of the squared RIR. Computer simulations carried out for a rectangular enclosure have proved that the RIR function reproduces the structure of a sound field in the initial stage of sound decay sufficiently well. They have also shown that band-limitedness of the RIR has evident influence on the shape of the decay function and predicted decay times.
Źródło:
Archives of Acoustics; 2016, 41, 1; 27-41
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biocontrol of Timber Decaying Fungi by Botanical Pesticides an Ecofreindly Technology
Autorzy:
Nagadesi, Praveen Kumar
Arya, Arun
Powiązania:
https://bibliotekanauki.pl/articles/1190214.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Timber decay
Biocontrol
Plant Extracts
Ecofriendly Technology
Lenzites rot
Ganoderma rot
Schizophyllum rot
Opis:
Timber is one of the longest-used building materials for various types of structures, and has been used in the construction of both historical and modern structures. Timer decay is caused by primarily enzymatic activities of microorganisms. The eco-friendly management of timber degrading fungi is tried by using plant extracts, oils and gels. In most of the fungi 25% methanolic extract was more effective than 5 and 10% concentrations. Lenzites sterioides was completely inhibited by 5% leaf extract of P. Juliflora and 10% leaf extracts of Prosopis, Cymbopogon and Datura at 25% concentration. Oils and gels of Cymbopogon citrates, Anacardium occidentale L., Gossypium barbadensis L., Linum usitatissimum L., Aloe vera L., and Aloe ferox Mill. were used to control the timber degrading fungi. Out of four oils cashew nut shell oil was most effective followed by cotton seed oil. Of the two Aloe gels tried the A. ferox gel showed better results than A. vera. For the first time the biocontrol of L. sterioides T. pini and S. commune, by botanical pesticides was reported. For the first time the biocontrol of L. sterioides T. pini S. commune, G. lucidum, and S. hirsutum by Oils and gels was reported.
Źródło:
World Scientific News; 2016, 44; 206-223
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laccase treatment of Norway spruce wood surface improves resistance and copper fixation of treated wood
Autorzy:
Vaukner Gabric, M.
Boncina, T.
Humar, M.
Pohleven, F.
Powiązania:
https://bibliotekanauki.pl/articles/52295.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
laccase
treatment
Norway spruce
Trametes versicolor
wood surface
wood decay
resistance
copper leaching
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2016, 59, 198
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spontaneous decay of level from spectral theory point of view
Autorzy:
Ianovich, Eduard
Powiązania:
https://bibliotekanauki.pl/articles/2048989.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
spectral theory
quantum field theory
self-adjoint operators
absolutely continuous spectrum
spontaneous decay
Opis:
In quantum field theory it is believed that the spontaneous decay of excited atomic or molecular level is due to the interaction with continuum of field modes. Besides, the atom makes a transition from upper level to lower one so that the probability to find the atom in the excited state tends to zero. In this paper it will be shown that the mathematical model in single-photon approximation may predict another behavior of this probability generally. Namely, the probability to find the atom in the excited state may tend to a nonzero constant so that the atom is not in the pure state finally. This effect is due to that the spectrum of the complete Hamiltonian is not purely absolutely continuous and has a discrete level outside the continuous part. Namely, we state that in the corresponding invariant subspace, determining the time evolution, the spectrum of the complete Hamiltonian when the field is considered in three dimensions may be not purely absolutely continuous and may have an eigenvalue. The appearance of eigenvalue has a threshold character. If the field is considered in two dimensions the spectrum always has an eigenvalue and the decay is absent.
Źródło:
Opuscula Mathematica; 2021, 41, 6; 849-859
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy decay result for a nonlinear wave p-Laplace equation with a delay term
Autorzy:
Laouar, Lakhdar Kassah
Khaled, Zennir
Powiązania:
https://bibliotekanauki.pl/articles/748364.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Nonlinear wave equation, Time varying delay term, Decay rate, Multiplier method, p-Laplacian.
Opis:
We consider the nonlinear (in space and time) wave equation with delay term in the internal feedback. Under conditions on the delay term and the term without delay, we study the asymptotic behavior of solutions using the multiplier method and general weighted integral inequalities.
Źródło:
Mathematica Applicanda; 2017, 45, 1
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of some modern scintillators recommended for use on large fusion facilities in γ-ray spectroscopy and tomographic measurements of γ-emission profiles
Autorzy:
Sibczynski, P.
Broslawski, A.
Gojska, A.
Kiptily, V.
Korolczuk, S.
Kwiatkowski, R.
Mianowski, S.
Moszyński, M.
Rzadkiewicz, J.
Swiderski, L.
Szydlowski, A.
Zychor, I.
Powiązania:
https://bibliotekanauki.pl/articles/146137.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
gamma spectrometry
scintillators
decay time
non-proportionality
energy resolution
detection efficiency
fusion plasma
Opis:
LaBr3:Ce,CeBr3 and GAGG:Ce scintillators were investigated and the determined characteristics were compared with those obtained for the well-known and widely used CsI:Tl and NaI:Tl crystals. All the detectors were of the same size of 10 × 10 × 5 mm3. The aim of this test study was to single out scintillation detectors most suitable for γ-ray spectrometry and γ -ray emission radial profile measurements in high-temperature plasma experiments. Decay time, energy resolution, non-proportionality and full energy peak detection efficiency were measured for γ -ray energies up to 1770 keV. Due to their good energy resolution, short decay time and high detection efficiency for MeV gamma rays, LaBr3:Ce and CeBr3 scintillators are proposed as the best candidates for use especially under conditions of high count rates, which are expected in the forthcoming DT experiments.
Źródło:
Nukleonika; 2017, 62, 3; 223-228
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absurda lex, sed lex? Public value and the decay of the Rule of Law: A conceptual perspective
Autorzy:
Behar-Villegas, Erick
Powiązania:
https://bibliotekanauki.pl/articles/2131148.pdf
Data publikacji:
2022-10-07
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
Public Value
Rule of Law
legal-formalism
legal institutions
democratic decay
property rights
Opis:
The Rule of Law serves, under a broadly accepted notion of justice, the enforcement of property rights and a relative predictability of citizen affairs, i.e. it fosters Public Value. However, it is subject to risks that materialise in weakened institutions, uncertainty and transaction costs. The connection between Public Value and the Rule of Law becomes salient when understanding how the latter degenerates at the expense of the former. This article provides two theoretical frameworks that explain the connection between the two concepts, as well as three manifestations of the Rule of Law’s decay. These comprise the excess of legal-formalism, the excess of discretion in enforcement and the instrumentalisation of the law, i.e. when it embodies injustice. Although they vary depending on the legal system, these aspects build a conceptual body that illustrates how contingent legal outcomes affect society, developing Daly’s (2019) concept of democratic decay in the economics and business literature.
Źródło:
Economics and Business Review; 2022, 8, 3; 7-26
2392-1641
Pojawia się w:
Economics and Business Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some new aspects of femtoscopy at high energy
Autorzy:
Stavinskiy, A.
Mikhailov, K.
Vlassov, A.
Erazmus, B.
Renault, G.
Powiązania:
https://bibliotekanauki.pl/articles/147368.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
residual correlations
strange baryon decay
reference sample
low energy scattering parameters
space-time
Opis:
It was shown within simple model simulations that particles momenta for strange baryon decay are correlated with its parents momenta. It can affect measure correlation function for different particle species.
Źródło:
Nukleonika; 2004, 49,suppl.2; 23-25
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exponential decay of solutions to a class of fourth-order nonlinear hyperbolic equations modeling the oscillations of suspension bridges
Autorzy:
Liu, Yang
Yang, Chao
Powiązania:
https://bibliotekanauki.pl/articles/2048892.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fourth-order nonlinear hyperbolic equations
weak solutions
exponential decay
family of potential wells
Opis:
This paper is concerned with a class of fourth-order nonlinear hyperbolic equations subject to free boundary conditions that can be used to describe the nonlinear dynamics of suspension bridges.
Źródło:
Opuscula Mathematica; 2022, 42, 2; 239-255
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chosen properties of oak wood immersed for 6 months in the Baltic Sea
Autorzy:
Fojutowski, A.
Wroblewska, H.
Kropacz, A.
Komorowicz, M.
Noskowiak, A.
Pomian, I.
Powiązania:
https://bibliotekanauki.pl/articles/29858.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chosen property
oak wood
Baltic Sea
strength
fungi
decay
chemical composition
archaeological wood
Opis:
Changes of physical and chemical properties, mass loss and susceptibility of oak wood to decay caused by Basidiomycetes fungi were assessed after wood samples had been taken out of the sea within the framework of MACHU project. Test samples of oak wood of the dimensions of 250 × 10 × 10 mm were placed in coastal waters of the Baltic Sea at the area of medieval seaport in Puck and in waters of the Gdansk Bay at the same longitude as Orłowo (near the wreck of Swedish warship Solen). The samples taken out of the sea were examined visually and described. Changes in mass of the samples, their bending strength and modulus of elasticity, compression strength along the grain, ability to decay caused by Trametes versicolor fungus, content of mineral substances and substances soluble in water, ethanol-benzene mixture and in 1-percent aqueous solution of NaOH, content of cellulose, lignin and pentosanes as well as pH of the wood were investigated. The properties of samples taken out of the sea after 6 months of immersion were compared with the properties of control twin samples of oak wood which had not been immersed. The results obtained so far indicate that noticeable, measurable changes in oak wood immersed in sea occur already in half a year since immersion, so observation of them may be useful for protection and monitoring of underwater archaeological objects.
Źródło:
Folia Forestalia Polonica. Series B - Drzewnictwo; 2011, 42
0071-6685
Pojawia się w:
Folia Forestalia Polonica. Series B - Drzewnictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Delignification of valuable timbers decayed by India lignicolous fungi
Autorzy:
Nagadesi, P.K.
Arya, A.
Powiązania:
https://bibliotekanauki.pl/articles/11080.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
delignification
India
lignicolous fungi
fungi
wood decay
teak
tree
biological process
wood degradation
Opis:
Wood degrading capacity of lignicolous fungi was studied by decay test. In which two methods were followed, i) wood chips method ii) wood block method. Eight timbers infected by six fungi were selected for studying percentage of decay and biochemical test was done to know delignification. After 12 months, 90 % of wood block of T. arjuna was decayed by L. stereoides. In teak wood 16.82 % of decay was due to H. apiaria in 3 months. As the percentage of moisture was less, percentage of weight loss was also less; this indicated that decay capacity of fungi will depends on % moisture content in wood. The percentage loss in hot water soluble substrates was more in case of T. crenulata due to L. stereoides for 5 months, whereas lowest in case of teak wood decayed by H. apiaria for 5 months. The percentage loss in ethanol benzene soluble substrate was more in case of Adina wood decayed by C. versicolor for 5 months, whereas lowest in case of teak wood infected with L. stereoides for 3 months. As the incubation period increases, percentage loss in acid soluble lignin was more in case of infected woods. L. stereoides, C. versicolor, and H. apiaria showed selective delignification in all infected woods, whereas T. pini showed simultaneous degradation of lignin in all woods tested. The valuable timber like teak wood was not resistant to wood decay because they loss 50% of lignin. The in vitro wood decay test can‟t be taken as absolute evidence for wood decay behavior of lignin-degrading fungi, so we should conform decay of wood by consider biochemical test. For rapid evaluation of wood decay the wood chip method was best suitable. For the first time the wood decay and biochemical test of 8 wood samples infected by white rot fungi like S. commune, L. stereoides, H. apiaria, C. versicolor, T. pini and soft rot fungi like T. viride was studied.
Źródło:
International Letters of Natural Sciences; 2014, 11, 2
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Revised Sound Energy Theory Based on a New Formula for the Reverberation Radius in Rooms with Non-Diffuse Sound Field
Autorzy:
Arau-Puchades, H.
Berardi, U.
Powiązania:
https://bibliotekanauki.pl/articles/177958.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reverberation radius
critical distance
non-diffuse sound field
sound energy
revised sound decay theory
Opis:
This paper discusses the concept of the reverberation radius, also known as critical distance, in rooms with non-uniformly distributed sound absorption. The reverberation radius is the distance from a sound source at which the direct sound level equals the reflected sound level. The currently used formulas to calculate the reverberation radius have been derived by the classic theories of Sabine or Eyring. However, these theories are only valid in perfectly diffused sound fields; thus, only when the energy density is constant throughout a room. Nevertheless, the generally used formulas for the reverberation radius have been used in any circumstance. Starting from theories for determining the reverberation time in non-diffuse sound fields, this paper firstly proposes a new formula to calculate the reverberation radius in rooms with non-uniformly distributed sound absorption. Then, a comparison between the classic formulas and the new one is performed in some rectangular rooms with non-uniformly distributed sound absorption. Finally, this paper introduces a new interpretation of the reverberation radius in non-diffuse sound fields. According to this interpretation, the time corresponding to the sound to travel a reverberation radius should be assumed as the lower limit of integration of the diffuse sound energy.
Źródło:
Archives of Acoustics; 2015, 40, 1; 33-40
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of Reaching the Regulatory Limit for the Release of Radioactive Liquid Waste in Nuclear Medicines
Autorzy:
Alfayyadh, Linda
Naimi, Sepanta
Mizban, Fadhil
Al-Hamami, Naheel
Alguraibawi, Marwah
Powiązania:
https://bibliotekanauki.pl/articles/24201728.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
radioactive iodine
I-131
liquid waste
storage system
decay system
nuclear medicine
authorisation limit
Opis:
The research was conducted at one of Iraq’s nuclear medical facilities in Baghdad, which uses radioactive iodine (I-131) to treat thyroid patients, the major purpose of this research was to meet the national legal limit for the release of radioactive liquid waste into the environment, a high purity germanium reagent radiation detector was used to evaluate nine iodine I-131 samples. From 2021 and 2023, the concentration of waste prior to storage and disposal was between 24498 Bq/L and 5.7 Bq/L. Short-lived radionuclides, such as I-131 with an 8.04-day half-life, may be released into the sewage system in line with Iraq’s Nationally Approved Limits and Austria’s International Atomic Energy Agency (IAEA). Moreover, it is stored for 10 times the half-life, or four months, until the choice to release it into the environment is made.
Źródło:
Journal of Ecological Engineering; 2023, 24, 5; 329--336
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty of the magnetic flux linkage measurements performed by modified current decay test
Autorzy:
Kowalik, Z.
Powiązania:
https://bibliotekanauki.pl/articles/141517.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flux linkage measurements
modified current decay test
uncertainty of integral calculations
uncertainty of simplicial approximation
Opis:
The paper presents the estimation methodology for uncertainties of magnetic flux linkage measurements, when the flux linkage and current functions with respect to time are obtained instead of single values of these quantities. The computed uncertainties are then used to estimate the quality of an approximation of a current-flux characteristic in the mathematical model of an electrical machine when the approximation is based on the results of measurements.
Źródło:
Archives of Electrical Engineering; 2017, 66, 3; 643-653
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of internal and constructional supports damping on the gamma-type frame vibrations
Autorzy:
Sochacki, W.
Rosikoń, P.
Topczewska, S.
Powiązania:
https://bibliotekanauki.pl/articles/127957.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
vibration damping
gamma-type frame
eigenvalue
amplitude decay factor
tłumienie drgań
wartość własna
współczynnik rozkładu
Opis:
The paper presents the formulation and solution of Γ-type frame damping vibration. The physical system model takes into account the energy dissipation of the vibrating frame due to the internal vibration damping of the viscoelastic frame material and the constructional damping in the place of frame bolt support. As the results of the problem solution, the damping and system geometry effects on the first frame eigenvalue (damped frequencies and coefficients of amplitude decay factor) were presented.
Źródło:
Vibrations in Physical Systems; 2014, 26; 257-264
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fundamental limitations of the decay of generalized energy in controlled (discrete-time) nonlinear systems subject to state and input constraints
Autorzy:
Selek, István
Ikonen, Enso
Powiązania:
https://bibliotekanauki.pl/articles/330074.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
decay rate maximization
Lyapunov function
nonlinear control system
rozkład wykładniczy
funkcja Lapunowa
układ sterowania nieliniowy
Opis:
This paper is devoted to the analysis of fundamental limitations regarding closed-loop control performance of discrete-time nonlinear systems subject to hard constraints (which are nonlinear in state and manipulated input variables). The control performance for the problem of interest is quantified by the decline (decay) of the generalized energy of the controlled system. The paper develops (upper and lower) barriers bounding the decay of the system’s generalized energy, which can be achieved over a set of asymptotically stabilizing feedback laws. The corresponding problem is treated without the loss of generality, resulting in a theoretical framework that provides a solid basis for practical implementations. To enhance understanding, the main results are illustrated in a simple example.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2019, 29, 4; 629-639
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
$L^p$-$L^q$-Time decay estimate for solution of the Cauchy problem for hyperbolic partial differential equations of linear thermoelasticity
Autorzy:
Gawinecki, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/1313322.pdf
Data publikacji:
1991
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
decay estimates
partial differential equations
Cauchy problem
symmetric hyperbolic system of first order
linear thermoelasticity
Opis:
We prove the $L^p$-$L^q$-time decay estimates for the solution of the Cauchy problem for the hyperbolic system of partial differential equations of linear thermoelasticity. In our proof based on the matrix of fundamental solutions to the system we use Strauss-Klainerman's approach [12], [5] to the $L^p$-$L^q$-time decay estimates.
Źródło:
Annales Polonici Mathematici; 1991, 54, 2; 135-145
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiary mikroprzepuszczalności oparte na zjawisku zanikania impulsu ciśnienia (pressure pulse decay)
Micropermeability measurements based on pressure pulse decay method
Autorzy:
Wojnicki, M.
Biały, S.
Kuśnierczyk, J.
Szuflita, S.
Warnecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/1835225.pdf
Data publikacji:
2018
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
mikroprzepuszczalność
zanikanie impulsu ciśnienia
pomiary przepuszczalności dla gazu
micropermeability
pressure pulse decay
gas permeability measurements
Opis:
W artykule przedstawiono wyniki prac badawczych skoncentrowanych na pomiarach mikroprzepuszczalności opartych na zjawisku zanikania impulsu ciśnienia (ang. pressure pulse decay). Głównym zamierzeniem przeprowadzonych prac było zbudowanie odpowiedniego stanowiska i opracowanie dla niego procedury badania mikroprzepuszczalności (w zakresie 0,1÷0,01 µD) w rdzeniach wiertniczych za pomocą azotu. Wykonano 50 pomiarów współczynnika przepuszczalności na 18 wyselekcjonowanych rdzeniach reprezentujących 3 różne typy litologiczne: dolomity (Ca2), środkowokambryjskie piaskowce kwarcowe oraz piaskowce czerwonego spągowca. Pomiary prowadzono przy trzech różnych ciśnieniach badawczych (porowych), tj. 70, 100 i 150 bar, a uzyskane na ich podstawie wartości współczynnika przepuszczalności zawierają się w zakresie 0,10÷122,12 µD. Na podstawie pomiarów wykonanych przy różnych ciśnieniach badawczych należy stwierdzić, że wartość współczynnika przepuszczalności zmniejsza się wraz z podwyższeniem ciśnienia. Obserwowany spadek przepuszczalności jest zmienny wśród przebadanych rdzeni i w przeliczeniu na 10 bar wzrostu ciśnienia wynosił 0,4÷38%, średnio około 5%. Na wartość współczynnika przepuszczalności ma również wpływ wartość zastosowanego naddatku ciśnienia w układzie uszczelnienia i – podobnie jak w przypadku ciśnienia badawczego – zwiększenie ciśnienia uszczelnienia skutkuje obniżeniem wartości współczynnika przepuszczalności. Obserwowany spadek przepuszczalności jest jednak bardziej wyraźny i w przeliczeniu na 10 bar wzrostu ciśnienia wynosił średnio 15%.
The paper presents the results of research focused on micropermeability measurements using pressure pulse decay method. The main aim of the work was to build a suitable test stand and to develop a micropermeability testing procedure (in the range of 0.1÷0.01 μD) in the drilling core samples, using nitrogen. 50 micropermeability measurements were performed on 18 selected cores, representing 3 different lithological types: dolomites (Main Dolomite), Middle Cambrian quartz sandstones and Lower Permian Rotligend sandstones. Measurements were conducted at three different test (pore) pressures: 70, 100 and 150 bar, and the resulting values of the permeability coefficient ranged from 0.10 to 122.12 μD. Basing on the measurements which were made at different pore (test) pressures, it should be noted that the value of the permeability coefficient decreases with increasing pressure. The observed decrease in permeability is variable among the tested cores and when calculated per 10 bar pressure increase, it was 0.4÷38%, averaged 5%. Permeability coefficient is also influenced by the value of confining pressure exerted by the sealing system, and same as in the case of pore pressure, increasing the confining pressure results in decreasing permeability. However, the observed decrease in permeability is more pronounced and when calculated per 10 bar pressure increase, averaged 15%.
Źródło:
Nafta-Gaz; 2018, 74, 5; 356-364
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of ammonium ionic liquids in particleboard technology
Zastosowanie cieczy jonowych w technologii płyt wiórowych
Autorzy:
Frackowiak, I.
Zabielska-Matejuk, J.
Fuczek, D.
Kot, M.
Powiązania:
https://bibliotekanauki.pl/articles/52535.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
wood technology
particle board
ammonium
ionic liquid
application
decay fungi
mould fungi
fungi
preservation technology
Opis:
Within the framework of Project no. POIG.01.03.01-30/074/08 “Ionic liquids in innovative technologies connected with processing of lignocellulosic raw materials” the Wood Based Panels and Glues Department of the Wood Technology Institute in Poznan carried out research aiming at application of ionic liquids in particleboard technology. The objective of the research was application of [DDA][NO3] and [BA][NO3] ionic liquids in preservation technology of panels resistant to biotic factors. The method for application of ionic liquids to particleboards, the type and amount of chosen ionic liquids, as well as their influence on standard parameters of the panels were investigated. In the tests the amine resin available on the domestic market and particles obtained from debarked Scots pine chips were used. The results of the research demonstrated that ionic liquids worsened parameters of the panels, but improved their resistance to decay fungi.
W Zakładzie Materiałów Drewnopochodnych i Klejów w ramach Projektu nr POIG.01.03.01-30/074/08 „Ciecze jonowe w innowacyjnych technologiach związanych z przetwarzaniem surowców lignocelulozowych” realizowane są badania zmierzające do zastosowania cieczy jonowych w technologii płyt wiórowych. Celem badań jest wykorzystanie cieczy jonowych w technologiach zabezpieczania płyt na działanie czynników biotycznych. Dotychczasowe badania obejmowały opracowanie sposobu wprowadzania cieczy do wiórów przeznaczonych do wytwarzania płyt, poznanie wpływu rodzaju i ilości wybranych cieczy jonowych – [DDA]NO3], [BA][NO3] – na standardowe właściwości. Stosowano klejową żywicę aminową dostępną na rynku krajowym i wióry pozyskane z korowanych zrębków sosnowych. Badania wykazały, że zastosowane ciecze jonowe obniżają właściwości mechaniczne płyt, poprawiają natomiast ich odporność na grzyby rozkładu brunatnego.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2010, 53, 184
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on mango (Mangifera indica L.) trunk decay by Phellinus gilvus (Schw.) Pat. from Himachal Pradesh, India
Autorzy:
Gautam, A.K.
Powiązania:
https://bibliotekanauki.pl/articles/11654.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
mango
Mangifera indica
fruit plant
tree trunk
rot decay
Phellinus gilvus
fungi
pathogenic fungi
India
Opis:
A severe white rot decay of a very old mango (Mangifera indica L.) tree trunk was observed form Himachal Pradesh, a hilly state of north India. The initial of decaying symptoms were firstly noticed in 2010 which progressed with destructive tissue death of tree trunk. A spongy, sessile, bracket-fungus was found associated with the decay. Morphological and microscopic examination of the collected specimens confirmed the fungus as Phellinus gilvus (Schw.) Pat. Since, P. gilvus is a saprobic fungus having a wide host range worldwide and M. indica is one of the most attacked hosts in India. Therefore, the present report is an important addition to the existing knowledge which will be helpful in understanding the pathogen diversity and interaction with host.
Źródło:
International Letters of Natural Sciences; 2014, 06
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic-time model at off-season germination
Autorzy:
Mahajan, T.S.
Pandey, O.P.
Powiązania:
https://bibliotekanauki.pl/articles/25089.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
seed
mung bean
decay
germination
water potential
temperature
light
soil
magnetic field
magnetic-time model
season
Opis:
Effect of static magnetic field on germination of mung beans is described. Seeds of mung beans, were exposed in batches to static magnetic fields of 87 to 226 mT intensity for 100 min. Magnetic time constant – 60.743 Th (Tesla hour) was determined experimentally. High value of magnetic time constant signifies lower effect of magnetic field on germination rate as this germination was carried out at off-season (13°C). Using decay function, germination magnetic constant was calculated. There was a linear increase in germination magnetic constant with increasing intensity of magnetic field. Calculated values of mean germination time, mean germination rate, germination rate coefficient, germination magnetic constant, transition time, water uptake, indicate that the impact of applied static magnetic field improves the germination of mung beans seeds even in off-season.
Źródło:
International Agrophysics; 2014, 28, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control problems without terminal constraints: The turnpike property with interior decay
Autorzy:
Gugat, Martin
Lazar, Martin
Powiązania:
https://bibliotekanauki.pl/articles/24200685.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
optimal control
turnpike property
system with hyperbolic PDEs
interior decay
sterowanie optymalne
układ hiperboliczny
rozkład wewnętrzny
Opis:
We show a turnpike result for problems of optimal control with possibly nonlinear systems as well as pointwise-in-time state and control constraints. The objective functional is of integral type and contains a tracking term which penalizes the distance to a desired steady state. In the optimal control problem, only the initial state is prescribed. We assume that a cheap control condition holds that yields a bound for the optimal value of our optimal control problem in terms of the initial data. We show that the solutions to the optimal control problems on the time intervals [0, T] have a turnpike structure in the following sense: For large T the contribution to the objective functional that comes from the subinterval [T/2, T], i.e., from the second half of the time interval [0, T], is at most of the order 1/T. More generally, the result holds for subintervals of the form [r T,T], where r ∈ (0, 1/2) is a real number. Using this result inductively implies that the decay of the integral on such a subinterval in the objective function is faster than the reciprocal value of a power series in T with positive coefficients. Accordingly, the contribution to the objective value from the final part of the time interval decays rapidly with a growing time horizon. At the end of the paper we present examples for optimal control problems where our results are applicable.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2023, 33, 3; 429--438
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The nuclear cap-binding protein complex is not essential for nonsense-mediated mRNA decay (NMD) in plants
Autorzy:
Dzikiewicz-Krawczyk, Agnieszka
Piontek, Paulina
Szweykowska-Kulińska, Zofia
Jarmołowski, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1040693.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
nuclear cap-binding protein complex
alternative splicing
mRNA surveillance
NMD
premature terminatin codon
nonsense-mediated mRNA decay
Opis:
In this study we investigated whether in plants, like in mammals, components of the nuclear cap-binding protein complex (CBC) are involved in nonsense-mediated mRNA decay (NMD). We selected several genes producing at least two alternatively spliced mRNA variants: one with a premature termination codon (PTC+) and another without it (PTC-). For each gene the PTC+/PTC- ratio was calculated using RT-PCR and direct sequencing in four Arabidopsis thaliana lines: wild type, the NMD mutant atupf3-1 and two CBC mutants: cbp20 and abh1. Whereas in the NMD mutant the ratios of PTC+/PTC- splice variants were higher than in wild-type plants, the two CBC mutants investigated showed no change in the PTC+/PTC- ratios. Our results suggest that neither CBP20 nor CBP80 is involved in NMD in A. thaliana.
Źródło:
Acta Biochimica Polonica; 2008, 55, 4; 825-828
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal project parameters of the bridge cranes main beams
Autorzy:
Vishnevetsky, G.
Kovalenko, V.
Sydorenko, S.
Brewczyński, D.
Powiązania:
https://bibliotekanauki.pl/articles/247431.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
machine building
bridge cranes
span beams
geometrical section parameters
optimal beam
constructions
time of free vibrations' decay
Opis:
In the article are presented main principles and leads-up to the choice of the general criterion of the main beams’ optimization. The main reasons leading to the destruction of arms include cyclic load causing fatigue phenomena, creep occurrence causing elements deformation beyond a critical state, the constructions’ blistering appearing owing to the metal maturing, corrosion of the main beams’ elements, leading to the loss of their carrying capacity. The general optimization criterion is chosen. The parameters of the main beams’ endurance are defined. The device for the measuring of the size and the character of the vibrations’ decay of the bridge cranes’ main beams is suggested. We have the results of the experimental information, received on the bridge cranes of the different plants. The work directions by the optimization of the constructive parameters of the cranes’ main beams are defined. Into the suggested construction of the span beam are put such statements: high values of the general optimization criterion’s; stiffness of the arm to the reduced weight ratio, possibility of the beam’s creation of the equal resistance, minimization of the local deflection tensions from the load cart on account of the inclined walls’ position. The construction of the patented span beam of the diaphragm construction is observed and described.
Źródło:
Journal of KONES; 2013, 20, 3; 411-417
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation of some technological features in the wood of ornamental species caused by Inonotus rickii (Pat.) Reid
Autorzy:
Annesi, T.
Calienno, L.
Picchio, R.
De Simone, D.
Lo Monaco, A.
Powiązania:
https://bibliotekanauki.pl/articles/52837.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
degradation
technological feature
wood
physical feature
mechanical feature
wood decay
ornamental tree
urban tree
Inonotus rickii
fungi
Opis:
Inonotus rickii (Pat.) Reid is a pathogenic wood-decaying fungus that causes severe decay in several ornamental urban trees in Europe. It has been known to occur on different hosts in Sicily (Italy) since 1985, and in Rome (Italy) since 2003. Some physical and mechanical wood features were studied according to the standards in order to propose an investigation methodology to set a deterioration ranking of urban trees. In this phase of the study, Celtis australis L., Acer negundo L., Acer campestre L., Robinia pseudoacacia L., Tilia × vulgaris Hayne, Ulmus minor Mill., Platanus × acerifolia (Aiton) Willd. and Quercus ilex L. were studied. The data were analyzed using ANOVA and M-ANOVA tests to check the differences among the specimens. A risk matrix was created in order to combine the features that showed statistical differences between the control specimens and the inoculated specimens, in order to establish, in vitro, a degradation ranking among the wood species. The wood species which showed no in vitro durability to I. rickii, were the same ones that displayed susceptibility in the living trees.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2015, 58, 195
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wooden composites from beech plywood and decorative veneers of different natural durability - their decay resistance and selected physico-mechanical properties
Autorzy:
Reinprecht, L.
Izdinsky, J.
Kmet'ova, L.
Powiązania:
https://bibliotekanauki.pl/articles/29893.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wooden composite
beech plywood
decorative veneer
natural durability
decay resistance
physicomechanical property
rotting fungi
water resistance
strength
Opis:
This work deals with decay resistance and selected physical and mechanical properties of wooden composites (WCs) prepared from 3.6 mm thick three-layer beech plywood and 0.6 mm thick decorative surface veneers of selected exotic (aningr´e, bubinga, iroko, khaya, padouk, sapelli, weng´e) and domestic (beech, European oak, sweet chestnut, walnut) wood species. Joining of veneers in the plywood and then also in the WCs was carried out by pressing processes using the PF glue Fenokol 43. The aim of the experiment was to determine the influence of surface veneers of different natural durability on rotting of the WCs, and on resistance of the WCs to water and mechanical loadings, as well. Decay resistance of individual veneers and WCs was tested by modified EN 113 against the brown-rot fungi Serpula lacrymans or Coniophora puteana, and the white-rot fungi Phanerochaete chrysosporium or Trametes versicolor. Weight losses of individual types of veneers and WCs caused by wood-destroying fungi were compared with weight losses of beech-veneer and beech-WC, respectively. The lowest weight losses at rotting processes showed the padouk-WC, i.e. WC prepared from the beech plywood and two the most durable padouk surface veneers. Density, water soaking, water swelling, tensile strength perpendicularly to the plane (?), and bending characteristics (MOR, MOE) of all WCs were determined in accordance with European standards. These physical and mechanical properties of the WCs were only partly influenced by the type of surface veneers. Selected types of the WCs, e.g. padouk-WC, could also be convenient for exterior expositions out of ground contact.
Źródło:
Folia Forestalia Polonica. Series B - Drzewnictwo; 2011, 42
0071-6685
Pojawia się w:
Folia Forestalia Polonica. Series B - Drzewnictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Timber degrading fungi in sawmills of Gujarat, India
Autorzy:
Nagadesi, P.K.
Arya, A.
Powiązania:
https://bibliotekanauki.pl/articles/11082.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
timber
degradation
fungi
sawmill
wood decay
Schizophyllum commune
Flavodon flavus
Daldinia concentrica
microorganism
Gujarat
India
forest cover
Opis:
Timer decay is caused by primarily enzymatic activities of microorganisms. For the first time fungal diversity of timber degrading fungi was studied in Gujarat, India. Timber Degrading Fungi belonging to Aphyllophorales are economically important as many of these cause serious damage in sawmills of Gujarat. To find out the association of the timber degrading fungi and timber decay problems in sawmills a survey was conducted during 2007 to 2011 in different sawmills of 5 districts of Gujarat i.e. Vadodara, Ahmedabad, Bharuch, Rajkot and Jamnagar. In the present study teak wood present in sawmills was infected with 14 types of fungi in which Lenzites sterioides and Trametes versicolor damaged the wood severely was reported for the first time. In all 94 sawmills were surveyed, the 28 sawmills were from Vadodara, 29 from Ahmedabad, 12 from Bharuch, 21 from Rajkot and 4 from Jamnagar. Out of 94 sawmills survyed, 84 sawmills were having timber rotting fungi associated with wood. Maximum fifteen and thirteen fungal species were observed in saw mills of Chhani road, followed by 11 in Station road, 7 in Dhabhoi road and 6 in Harni, Vadodara. Fours woods uninfected are Beyo, Marinty, Ash, and Arjun. Fourteen different types of fungi were found associated with teak, followed by seven in pinus, madhuca, Acacia nilotica, six in babul, neem, four in tamarind, Pithacoelobium and three in mango, Eucalyptus, African Mahagoni, Kapoor, Peltophoram rouxburghii, Derris pinnata wood respectively. The commonly observed timber decaying fungi were Schizophyllum commune, Flavodon flavus and Ganoderma lucidum belonging to Basidiomycota. Ascomycota members included was Daldinia concentrica and Xylaria polymorpha.
Źródło:
International Letters of Natural Sciences; 2014, 02
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New records of lignicolous fungi from Krishna District, Andhra Pradesh, India
Autorzy:
Nagadesi, P.K.
Bhavani, J.
Arya, A.
Powiązania:
https://bibliotekanauki.pl/articles/10890.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
new record
lignicolous fungi
fungi
species list
wood decay
wood
wood product
Krishna district
Andhra Pradesh state
India
Opis:
Lignicolous fungi include many wood decay fungi. Studies on molds and decay fungi are necessary to enable us to control their growth on wood and wood products. A survey was undertaken during 2012-2013 to detect the various ligniclous fungi in Andhra Loyola College, Vijayawada and Krishna District, Andhra Pradesh. In a recent study, lignicolous fungi were collected from living trees and fallen branches from Andhra Loyola College, Vijayawada, India. On the basis of occurrence Coriolopsis aspera (Junghuhn) Teng. Fulvifomes nilgheriensis (Montagne) Bondartseva & S. Herrera, Ganoderma australe (Fr.) Pat., G. lucidum (Curtis) P. Karsten, Hexagonia apiaria (Pers.) Fr. Phellinus linteus (Berk. & Curt.) Teng. Trametes cingulata Berk. Hook., T. cotonea (Pat. & Har.) Ryv. T. gibbosa (Pers.) Fr. Schizophyllum commune Fr. were reported from Krishna district for the first time. F. nilgheriensis (Montagne) Bondartseva & S. Herrera is recorded for the first time from India. Even though being preliminary, our results point to the necessity of conservation and protection of recent fungal diversity but, in our opinion, not by making so-called “Red list of endangered species", which, due to the lack of information and very poor evidence on this group of organisms in the region under the consideration, are extremely unreliable and therefore disputable, but rather through the very short list of few not endangered species, conditionally called “White list of not endangered fungal species", if such species recently exist at all.
Źródło:
International Letters of Natural Sciences; 2014, 12, 1
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Żywienie a próchnica zębów. Cz. II. Wyniki badań histologicznych uzębienia szczurów białych z doświadczalną próchnicą
Chast II. Rezul'taty gistologicheskikh issledovanijj zubov belykh krys pri ehksperimental'nom karioze
Nutrition and dental caries. II. Histological picture of teeth in the rat with experiment dental caries
Autorzy:
Opuszynska, T.
Obersztyn, A.
Szczygiel, A.
Powiązania:
https://bibliotekanauki.pl/articles/876570.pdf
Data publikacji:
1962
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
zeby
prochnica zebow
uzebienie
zywienie zwierzat
szczury
badania histologiczne
tooth
tooth decay
dentition
animal feeding
histological analysis
rat
Źródło:
Roczniki Państwowego Zakładu Higieny; 1962, 13, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling studies of water chlorination efficiency in municipal water supply network
Analiza modelowa efektywności chlorowania wody w miejskiej sieci wodociągowej
Autorzy:
Musz-Pomorska, Anna
Widomski, Marcin K.
Powiązania:
https://bibliotekanauki.pl/articles/1819557.pdf
Data publikacji:
2020
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
chlorine decay
chlorination of water
chlorine distribution in water
EPANET
rozkład chloru
chlorowanie wody
dystrybucja chloru w wodzie
Opis:
Chlorination of water belongs to the basic methods of its disinfection and is commonly used, permanently or periodically, as the final stage of water treatment in many water treatment stations in Poland. Although, the chlorination process is a well-known phenomenon, the selection of an appropriate dose of disinfectant is still a difficult task. The lack of chlorine in the water or its excessively low content (below 0.2 mg × dm–3) may result in the lack of microbiological protection of water flowing through the pipes. A reverse situation is also unfavourable. The use of too high doses of chlorine at the entrance to the network, on the one hand, ensures adequate disinfectant concentration even in the fittings of the network, on the other hand, it can lead to dangerous for health disinfection by-products (DBPs) including trihalomethanes (THMs). The selection of the proper dose of chlorine should take into account factors affecting its consumption, chemical parameters of water as well as hydraulic parameters of water transport. Such possibilities are available due to application of numerical modelling to study the transport of chlorine in water. The aim of the presented research is to analyse the effectiveness of chlorination of water in a selected water supply network. Simulation tests were carried out for the various doses of disinfectant supplied to the network for the assumed duration of the simulation – 168 hours. The qualitative model was developed in the Epanet 2.0 software using a hydraulic model of the tested network. The first order chlorine decay reaction was assumed to modelling studies, with applied literature values of decay rate of chlorine in water. The results of simulation tests of chlorine transport in the network revealed difficulties in choosing the right dose of chlorine necessary to ensure microbiological protection of water in the network. The forced flow allowed effective disinfection of water.
Źródło:
Ecological Chemistry and Engineering. A; 2020, 27, 1-2; 1-13
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interpolated-DFT-Based Fast and Accurate Amplitude and Phase Estimation for the Control of Power
Autorzy:
Borkowski, J.
Kania, D.
Powiązania:
https://bibliotekanauki.pl/articles/221570.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
control of power
grid signal
amplitude and phase estimation
renewable energy
interpolated DFT
maximum decay side-lobes windows
Opis:
Quality of energy produced in renewable energy systems has to be at the high level specified by respective standards and directives. One of the most important factors affecting quality is the estimation accuracy of grid signal parameters. This paper presents a method of a very fast and accurate amplitude and phase grid signal estimation using the Fast Fourier Transform procedure and maximum decay side-lobes windows. The most important features of the method are elimination of the impact associated with the conjugate’s component on the results and its straightforward implementation. Moreover, the measurement time is very short ‒ even far less than one period of the grid signal. The influence of harmonics on the results is reduced by using a bandpass pre-filter. Even using a 40 dB FIR pre-filter for the grid signal with THD ≈ 38%, SNR ≈ 53 dB and a 20‒30% slow decay exponential drift the maximum estimation errors in a real-time DSP system for 512 samples are approximately 1% for the amplitude and approximately 8.5・10‒2 rad for the phase, respectively. The errors are smaller by several orders of magnitude with using more accurate pre-filters.
Źródło:
Metrology and Measurement Systems; 2016, 23, 1; 13-26
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First record of Hericium flagellum (Basidiomycota) from the “Olbina” nature reserve in Wielkopolska Voivodship, Poland
Autorzy:
Kujawska, M.B.
Stasinska, M.
Leski, T.
Rudawska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2197183.pdf
Data publikacji:
2019-12-23
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Hericium flagellum
Basidiomycota
decaying wood
wood decay fungi
coniferous tree
Abies alba
silver fir
nature reserve
Wielkopolska voivodship
Polska
Opis:
Hericium flagellum (Scop.) Pers. is considered a rare, wood-decaying fungus that occurs on coniferous trees, predominantly on silver fir (Abies alba). In this paper, a new locality of H. flagellum in Wielkopolska Voivodship is presented, along with the macro- and micromorphological features of the collected specimens. Basidiomata of H. flagellum were found in November 2016 and 2017 in the “Olbina” nature reserve (ATPOL Dc-97, Kalisz Forest District), located in a continental mixed coniferous forest close to the northern border of the natural range of silver fir. In 2016, H. flagellum was found growing in the hollow of an old stump of silver fir, and in the following year, this fungus was recorded on a fallen log of silver fir. The implications for conservation are briefly presented. Prospects of further development of the basidiomata of H. flagellum in the “Olbina” reserve are also discussed.
Źródło:
Acta Mycologica; 2019, 54, 2; 1133
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uniform stabilization of the quasi-linear Kirchhoff wave equation with a nonlinear boundary feedback
Autorzy:
Lasiecka, I.
Powiązania:
https://bibliotekanauki.pl/articles/206039.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
quasi-liniowe równanie falowe Kirchhoffa
a priori bounds
global existence
nonlinear damping
quasilinear Kirchhoff wave equation
uniform decay rates
Opis:
An n-dimensional quasi-linear wave equation defined on bounded domain Omega with Neumann boundary conditions imposed on the boundary Gamma and with a nonlinear boundary feedback acting on a portion of the boundary [Gamma sup 1 is a subset of Gamma] is considered. Global existence, uniqueness and uniform decay rates are established for the model, under the assumption that the H[sup 1](Omega) x L[sub 2](Omega) norms of the initial data are sufficiently small. The result presented in this paper extends these obtained recently in Lasiecka and Ong (1999), where the Dirichlet boundary conditions are imposed on the uncontrolled portion of the boundary Gamma[sub o] = Gamma \ [closure of a set Gamma sub 1], and the two portions of the boundary are assumed disjoint, i.e. [... ]. The goal of this paper is to remove this restriction. This is achieved by considering the "pure" Neumann problem subject to convexity assumption imposed on Gamma[sub o]. \@eng\\
Źródło:
Control and Cybernetics; 2000, 29, 1; 179-197
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The comparison of cohesive soil damping ratios obtained from resonant column tests and designated by the free-vibration decay and half-power bandwidth method
Porównanie wartości współczynnika tłumienia gruntu spoistego z laboratoryjnych badań w kolumnie rezonansowej uzyskanych metodą krzywej gaśnięcia drgań swobodnych i metoda half-power bandwidth
Autorzy:
Sas, W.
Powiązania:
https://bibliotekanauki.pl/articles/40369.pdf
Data publikacji:
2016
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
soil parameter
laboratory test
field test
dynamic parameter
comparison
cohesive soil
resonant column
free-vibration decay
half-power bandwidth method
Opis:
One of the aims of modern laboratory studies is searching for dynamic parameters in a small strain of a soil. The reason behind this trend is the higher level of density of urban areas. City traffic, including trams, cars and subway trains, as well as certain types of construction works, can generate seismic waves, which cause a small strain between the soil and the structure to occur. This may lead to an exceeded limit serviceability state. The three main dynamic parameters of the soil are: Young modulus, shear modulus and damping ratio. Estimation of the cohesive soils damping ratio by two methods, namely free-vibration decay and half-power bandwidth, is the main goal of this article. The author performed his own research on two silty clay specimens in a resonant column. The conducted research show that the damping ratio obtained by using the half-power bandwidth method has significant error margin, which is equal approximately 50-60%, yet the curve shapes are very similar to the ones obtained by using the second method discussed in this paper. In author's opinion, more research on cohesive soils has to be performed in order to introduce necessary corrections to half-power bandwidth equations.
Jednym z celów we współczesnych badaniach laboratoryjnych jest poszukiwanie dynamicznych parametrów gruntu w tzw. małym zakresie odkształcń. Przyczyną takiego stanu rzeczy jest m.in. coraz gęstsza zabudowa miejska, a także ruch miejski, w tym: tramwaje, samochody, pociągi metra i niektóre rodzaje robót budowlanych, które mogą generować powstawanie małych odkształceń na styku grunt - konstrukcja. Takie odkształcenia mogą prowadzić do przekroczenia stanu granicznego używalności konstrukcji. Grunt posiada trzy główne parametry dynamiczne: moduł odkształcalności podłużnej, moduł ścinania oraz współczynnik tłumienia. Głównym celem artykułu było wyznaczenie współczynnika tłumienia gruntu spoistego metodą krzywej gaśnięcia drgań swobodnych i metodą half-power bandwidth. Przeprowadzono badania w kolumnie rezonansowej na dwóch próbka iłu pylastego. Wyniki pokazują, że metoda half-power bandwidth przeszacowuje współczynnik tłumienia w stosunku do metody krzywej gaśnięcia drgań swobodnych od 50 do 60%. Jednak kształty uzyskanych krzywych współczynnika tłumienia w zależności od odkształcenia postaciowego są bardzo podobne. Stwierdzono, że należy przeprowadzić dalsze badania, mające na celu wprowadzenie poprawek do równań metody half-power bandwidth.
Źródło:
Acta Scientiarum Polonorum. Architectura; 2016, 15, 1
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka morfologiczna i fizjologiczna izolatów Phytophthora alni otrzymanych z chorych olszy, gleby i wody
Morphological and physiological characteristic of Phytophthora alni isolates obtained from diseased alder, soil and water
Autorzy:
Trzewik, A.
Orlikowska, T.
Powiązania:
https://bibliotekanauki.pl/articles/973841.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
grzyby
izolaty grzybowe
cechy fizjologiczne
cechy morfologiczne
fitopatologia
mikologia
Phytophthora alni
czynniki chorobotwórcze
alder decay
phytophthora alni
morphological and physiological characteristic
Opis:
The morphological and physiological features of 31 Phytophthora alni isolates from diseased alder, soil and water samples were determined. Optimum temperature for growth, sporangia produced and sex organs were examined.
Źródło:
Sylwan; 2011, 155, 01; 63-69
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ruchy populistyczne i degeneracja elit przywódczych – analiza weberowska
Populist movements and degeneration of political elites – Weberian analysis
Autorzy:
Pakulski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/561446.pdf
Data publikacji:
2016-12-31
Wydawca:
Collegium Civitas
Tematy:
populizm
ruchy populistyczne
przywództwo polityczne
antyelityzm, demagogia
degeneracja elit
rozkład polityczny
populism
populist movements
leadership
antielitism
demagogy
elite degeneration
political decay
Opis:
Współczesne ruchy populistyczne – przedstawione jako typ idealny (antyelityzm, demagogia, „obywatelizm”, spiskowa interpretacja, proste rozwiązania, ekskluzywizm) – są analizowane zgodnie z weberowskim podejściem badawczym oraz agendą badań. Kieruje to uwagę na dominujące orientacje, role przywódców, relacje pomiędzy przywódcami i aktywistami oraz na cykliczny charakter ruchów. Ruchy te pojawiają się w okresach gwałtownych przemian społecznych i towarzyszących im kryzysów. Ich następstwami jest zwolnienie racjonalizacji polityki i cykliczne degeneracje elit politycznych. Prowadzą one do osłabienia głównych instytucji politycznych: państwa, rządów prawa oraz demokratycznych rozliczeń przywódców politycznych.
Contemporary populist movements – outlined as an ideal type (antielitism, demagogy, „citizenism”, conspiracy accounts, simple solutions, exclusivism) – are analysed according to the Weberian approach and research agenda. They focus on dominant orientations, the importance of leadership, relationships between leaders, activists and followers, and – importantly – on the cyclical trajectories of movements. Populist movements erupt at the times of rapid social change and the accompanying crises. They delay rationalisation of politics by causing degeneration of political elites and political „decay”, that is weakening the core political institutions of the state, rule of law, and democratic accountability of political leader
Źródło:
Zoon Politikon; 2016, 7; 57-74
2543-408X
Pojawia się w:
Zoon Politikon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozwój grzybni Fomitopsis officinalis na podłożach organicznych oraz drewnie modrzewiowym w warunkach laboratoryjnych
Autorzy:
Piętka, J.
Powiązania:
https://bibliotekanauki.pl/articles/1023974.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drewno modrzewiowe
Fomitopsis officinalis
grzyby
czynniki chorobotworcze
podloza hodowlane
lesnictwo
wzrost grzybni
fitopatologia lesna
fomitopsis officinalis
medium
temperature
ph
wood decay
Opis:
The development of Fomitopsis officinalis mycelium depending on the composition and pH of the medium and incubation temperature was examined in the experiment. The potential of mycelium growth on wheat grain and larch sawdust, as well as the decay rate of larch sapwood and heartwood samples were also analysed.
Źródło:
Sylwan; 2004, 148, 09; 34-42
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad szybkością zaniku chloru i dwutlenku chloru w wodzie w sieci wodociągowej
Rate of chlorine and chlorine dioxide decay in the water-pipe network
Autorzy:
Domańska, M.
Łomotowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/236588.pdf
Data publikacji:
2009
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
woda wodociągowa
dezynfekcja
chlor
dwutlenek chloru
stała szybkości zaniku dezynfektanta
tap water
disinfection
chlorine
chlorine dioxide
rate constant of disinfectant decay
Opis:
Praca zawiera oryginalne wyniki badań nad szybkością zaniku chloru i dwutlenku chloru w wodzie, wykonanych na próbkach wody pobranych z 14 systemów wodociągowych eksploatowanych na Dolnym Śląsku. Badania wykazały, że w przypadku wody, która ma duże natychmiastowe zapotrzebowanie na chlor, następuje szybszy zanik dwutlenku chloru. Zatem należy zweryfikować tezę, że dwutlenek chloru w systemach wodociągowych ulega wolniejszemu zanikowi, w porównaniu do chloru. Ponadto stwierdzono, że wartość stałej szybkości zaniku dezynfektanta ulega zmianie w czasie transportu wody wodociągowej. Badania przeprowadzone na rurociągu tranzytowym eksploatowanym we Wrocławiu wykazały różnice w kinetyce zaniku chloru i dwutlenku chloru w czasie przepływu wody w sieci wodociągowej. Uzyskane wyniki wskazują na potrzebę prowadzenia indywidualnych badań nad szybkością zaniku dezynfektanta w wodzie w celu prognozowania jego stężenia w całym systemie wodociągowym. Przeprowadzenie takich badań jest niezbędne przy zamianie dezynfektanta, a także przy ustalaniu punktów dodatkowej dezynfekcji wody w rozległych systemach wodociągowych.
This paper presents original results of a study on the rate of chlorine and chlorine dioxide decay in trea-ted water. Samples were taken from 14 water distribution systems which are in service in Lower Silesia. The study has revealed that when the water is characterized by a high 5-minute chlorine demand, the decay of chlorine dioxide occurs at a faster rate. It is therefore necessary to verify the thesis that the decay of chlorine dioxide in the water distribution system proceeds at a slower rate than the decay of chlorine. It has furthermore been observed that the value of the rate constant of disinfectant decay undergoes changes during tap water transport. The investigations into a segment of Wroclaw's water pipeline have revealed differences in the kinetics between chlorine decay and chlorine dioxide decay during water flow in the water-pipe network. The results obtained corroborate the necessity of conducting point tests to determine the local rate of decay for both the disinfectants in the water with the aim to predict their concentrations in the entire water distribution system. Such tests are indispensable when replacing the disinfectant used with another one, or when determining additional disinfection points in large water distribution systems.
Źródło:
Ochrona Środowiska; 2009, 31, 4; 47-49
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie charakterystyk dynamicznych podwieszonej kładki dla pieszych wykonanej z kompozytu GFRP
Investigation of dynamic characteristics of cablestayed footbridge made of GFRP composite
Autorzy:
Górski, P.
Stankiewicz, B.
Tatara, M.
Powiązania:
https://bibliotekanauki.pl/articles/104977.pdf
Data publikacji:
2017
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
obiekt mostowy
kompozyt GFRP
parametry modalne
drgania swobodne
tłumienie konstrukcyjne
bridge structure
GFRP composite
modal parameters
free-decay vibration
structural damping
Opis:
W artykule przedstawiono sposób określenia i wyniki analizy charakterystyk dynamicznych podwieszonej kładki dla pieszych, znajdującej się w miejscowości Kolding w Danii, wykonanej w całości z kompozytu polimerowego na bazie włókien szklanych GFRP. Na podstawie pomiarów przyspieszeń drgań swobodnych pomostu kładki, wymuszonych podskokami jednej osoby, dokonano identyfikacji pięciu pierwszych częstości drgań własnych, odpowiadających postaci drgań własnych i wartości liczby tłumienia konstrukcyjnego. Częstości i postacie drgań własnych wyznaczono metodą dekompozycji w dziedzinie częstotliwości. Wartości liczby tłumienia konstrukcyjnego wyznaczono na podstawie aproksymacji metodą najmniejszych kwadratów odfiltrowanych drgań swobodnych pomostu kładki. Otrzymane wartości liczby tłumienia porównano z wartościami podanymi w literaturze dla wybranych kładek o konstrukcjach wykonanych z innych, alternatywnych materiałów. Stwierdzono stosunkowo dużą wartość tłumienia konstrukcyjnego analizowanej kładki. Otrzymane wyniki badań mogą być pomocne do obliczenia dynamicznej odpowiedzi nowoprojektowanych konstrukcji mostowych, a także do oceny i monitorowania stanu technicznego istniejących obiektów mostowych o konstrukcji wykonanej z kompozytów na bazie włókien szklanych GFRP.
The aim of this paper is to investigate of dynamic characteristics of cable-stayed footbridge in Kolding, Denmark, made entirely of Glass Fiber Reinforced Polymer (GFRP) composite. During examination based on in situ free-decay measurements and using accelerometers under human jumping the primary five natural frequencies, corresponding mode shapes and damping ratios of the footbridge were identified. The Frequency Domain Decomposition (FDD) approach was applied to identify the natural frequencies and mode shapes. The corresponding damping ratios were extracted by using a least square curve fitting approximation of the filtered free-decay vibration of the footbridge deck. The estimated damping ratios were compared with data published in the literature for selected footbridges made of various conventional materials. The obtained experimental results provide a relevant data regarding the dynamic response prediction or structural health monitoring of all-GFRP composite footbridges.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2017, 64, 3/I; 499-510
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The medicinal wood-decay species Laricifomes officinalis in the Alpe Veglia–Alpe Devero Natural Park (Italian Alps): spatial analysis and growth tests of pure cultures
Autorzy:
Girometta, Carolina Elena
Rovelli, Laura
Bracco, Francesco
Brescia, Francesca
Baiguera, Rebecca Michela
Chiatante, Gianpasquale
Picco, Anna Maria
Savino, Elena
Powiązania:
https://bibliotekanauki.pl/articles/11543426.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
wood decay fungi
Laricifomes officinalis
Larix decidua
biodiversity conservation
larch
spatial analysis
growth test
pure culture
natural park
Alps Mountains
Italy
Opis:
Laricifomes officinalis is a wood-decay fungus that is closely associated with old individuals of Larix decidua. In the twentieth century, L. officinalis was over-harvested because of its medicinal properties; consequently, it has become very rare or almost extinct in the Alps. In this study, we investigated the population of L. officinalis in the Alpe Veglia–Alpe Devero Natural Park (Val d’Ossola, Italy) to assess a preliminary conservation strategy. Population consistency was estimated using field mapping, and spatial analysis was performed on host trees based on topographical and environmental variables. Mycelia were isolated from harvested basidiomata, and strain identity confirmed by molecular analysis of the ITS region. All isolated strains were tested for growth in Petri dishes containing different standard media to determine which strains had the highest growth rates; the fastest growing strains may be selected for future studies and applications. Compared to the control strains from Val Malenco and Parco Nazionale del Gran Paradiso, all strains from Alpe Veglia–Alpe Devero Natural Park had lower growth rates. There was no significant difference between the growth rates of strains from Alpe Veglia and those from Alpe Devero. The results suggest that the population consistency of L. officinalis in the Alpe Veglia–Alpe Devero Natural Park is related to two main factors: habitat preservation and harvesting prohibition. These results confirm the need to protect L. officinalis both inside and outside natural reserves, despite the apparent increase in local populations.
Źródło:
Acta Mycologica; 2021, 56, 1; 569
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie funkcji oporu przestrzeni w programowaniu rozbudowy sieci dróg rowerowych w Krakowie
Use of the gravity model for development of the bicycle path network in Krakow
Autorzy:
Kowalski, Ł.
Łobodzińska, A.
Szabó, G.
Powiązania:
https://bibliotekanauki.pl/articles/248684.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
model lokalizacji
model grawitacji
sieć ścieżek rowerowych
ruch rowerowy
funkcja oporu odległości
location model
gravity model
bicycle network
bicycle traffic
distance decay function
Opis:
Celem artykułu jest ustalenie, w jakiej kolejności powinny powstawać odcinki tras rowerowych w Krakowie. W oparciu o model grawitacji autorzy skonstruowali model lokalizacji nowych odcinków w sieci uwzględniający potencjalne przepływy między miejscami zamieszkania a: centrum, miejscami pracy, liceami ogólnokształcącymi i uczelniami. Jako funkcję oporu odległości zastosowano funkcję eksponencjałną. Za podstawowe zasady, które powinna spełniać prawidłowo zaprojektowana sieć dróg rowerowych, uznano spójność i bezpośredniość. Poszczególne cechy użyte w konstrukcji modelu sprowadzono do centroidów lub ich rzeczywistych lokalizacji punktowych. Pomierzone wartości oddziaływań pomiędzy nimi poddano standaryzacji, a następnie zsumowano, uzyskując sumaryczny wskaźnik określający znaczenie danego odcinka w sieci dla wszystkich badanych typów przemieszczeń. Na podstawie wartości wskaźnika sumarycznego oraz położenia odcinka w sieci dróg rowerowych zaproponowano kolejność, w jakiej powinny powstawać nowe fragmenty sieci. Priorytet nadano odcinkom, których wartości wskaźnika sumarycznego są wysokie i które przyczynią się do zwiększenia spójności i bezpośredniości sieci oraz stosunkowo krótkim trasom o niższych wartościach, które uzupełniają istniejącą sieć. Skonstruowany przez autorów model jest narzędziem umożliwiającym podejmowanie decyzji dotyczących kolejności lokalizacji nowych odcinków sieci dróg rowerowych oraz modernizacji istniejących. Uwzględnienie przepływów potencjalnych zamiast rzeczywistych pozwala uniknąć faworyzowania ciągów, w których istnieją już odcinki sieci. Ponadto model zjednej strony zakłada jednakowe traktowanie wszystkich mieszkańców, z drugiej jednak - umożliwia nadanie priorytetu konkretnej grupie przez zmianę wag przy wskaźniku sumarycznym.
The aim of the paper is to discover the order in which new sections of Cracow cycle route network shall be built. Basing on gravity model the authors created a location model for any new section of the network. Potential flows between homes and city centre, workplaces, secondary schools and universities were considered. Exponential function was applied as a distance-decay function. Moreover, the authors assumed that a well-planned cycle network shall fulfil two requirements: coherence and directness. Data used in the model were reduced to centroids (population and workplaces) or their actual locations (schools, universities and student houses). Measured values of interactions were standardised and summed. As a result, general index, informing about the importance of particular section in the whole network, was obtained. The authors proposed an order of building the cycle paths basing on general index value and location of a section within cycle network. The priority was given to sections, which obtained high index value and will increase coherence and directness of the network, as well as to short paths completing existing network. The presented model assumes the equal treatment for all groups of inhabitants. On the other hand, it enables prioritisation of certain group by changes of weights in the general index.
Źródło:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2012, 2(98); 121-131
1231-9171
Pojawia się w:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena jakości akustycznej pomieszczenia na podstawie krzywej rozkładu dźwięku w przestrzeni oraz krzywej zaniku
Assessment of a room acoustic quality on a basis of spatial decay curve
Autorzy:
Jabłoński, M
Powiązania:
https://bibliotekanauki.pl/articles/362679.pdf
Data publikacji:
2011
Wydawca:
Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:
akustyka pomieszczeń
krzywe rozkładu dźwięku
czas pogłosu
ciśnienie akustyczne
właściwości akustyczne pomieszczeń
room acoustics
spatial decay curve
reverberation time
acoustic pressure
acoustic properties
Opis:
W artykule przedstawiono wyniki czasu pogłosu, spadku poziomu ciśnienia akustycznego w przestrzeni z podwojeniem odległości DL2 i nadwyżki poziomu ciśnienia akustycznego DLf otrzymane z obliczeń symulacyjnych oraz z pomiarów dla holu i przestrzeni multimedialnej w budynku szkolnym.
This paper presents the results of spatial decay in hall, obtained using numerical techniques. They were compared with measurements data of this parameter in real room.
Źródło:
Fizyka Budowli w Teorii i Praktyce; 2011, T. 6, nr 2, 2; 41-45
1734-4891
Pojawia się w:
Fizyka Budowli w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ rodzaju podawanych tłuszczów na występowanie zmian w zębach i przyzębiu szczurów
Vlijanie raznykh zhirov na izmenenija v zubakh i prizubnykh prostranstvakh u belykh krys
Effect of different dietary fats on incidence of dental and gungival changes in rats
Autorzy:
Wysocki, E.
Ziombski, H.
Powiązania:
https://bibliotekanauki.pl/articles/871588.pdf
Data publikacji:
1963
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
zwierzeta doswiadczalne
szczury
uzebienie
zeby
przyzebie
ubytki
prochnica zebow
zywienie zwierzat
experimental animal
rat
dentition
tooth
periodontal change
tooth decay
tooth loss
animal feeding
Źródło:
Roczniki Państwowego Zakładu Higieny; 1963, 14, 4
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad poziomem fluoru w wodzie do picia na terenie woj. łódzkiego
Issledovanija nad urovniem ftora v pitievojj vode teritorii lodzkogo vojevodstva
Fluorine content in drinking water of Lodz district in Poland
Autorzy:
Bartnicka, W.
Garczynska, Z.
Bednarek, Z.
Demby, S.
Krupa, H.
Piotrowski, W.
Siedlecki, J.
Powiązania:
https://bibliotekanauki.pl/articles/871842.pdf
Data publikacji:
1962
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
woda pitna
wodociagi miejskie
fluor
zawartosc fluoru
wspolzaleznosc
prochnica zebow
woj.lodzkie
drinking water
water supply
fluorine
fluorine content
interrelation
tooth decay
Lodz voivodship
Źródło:
Roczniki Państwowego Zakładu Higieny; 1962, 13, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peach antioxidant and phenolic activities influenced by the application of 1-methylcyclopropene (1-MCP) at post-harvest
Autorzy:
Shah, S.T.
Sajid, M.
Khan, N.U.
Rab, A.
Amin, N.U.
Arif, M.
Haleema, B.
Saeed, S.
Powiązania:
https://bibliotekanauki.pl/articles/12297475.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
plant cultivation
peach tree
Prunus persica
fruit tree
antioxidant activity
phenolic compound activity
1-methylcyclopropene
catalase activity
fruit
fruit decay
storage durability
shelf life
Opis:
Early maturing peach (Prunus persica) cultivars can fetch good market value but face a lot of post-harvest problems that lead to the post-harvest losses. The 1-methylcyclopropene (1-MCP) can provide new insights into plant ethylene responses and extend the shelf life and quality of fruits. Therefore, fruits of peach cultivar ‘Early Grand’ were dipped in various concentrations of 1-MCP (0, 0.3, 0.6 and 0.9 µg l–1), stored for 40 days at 8 ±2°C with 50% relative humidity and analyzed the fruits for physicochemical attributes at 10 days interval. The highest concentration of 1-MCP at 0.9 µg l–1 significantly improved the activity of antioxidants, catalase, free radical scavenging assay and total phenols. However, the peach fruits treated with 1MCP at 0.6 µgL–1 was effective in retaining the ascorbic acid, lowering the weight loss and fruit decay. Therefore, peach fruits can be treated with 1-MCP (0.6 µg l–1) solution for prolonging its shelf life up to 40 days under low temperature.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 2; 71-85
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ osadów wodociągowych na kinetykę zużycia chloru i dwutlenku chloru w wodzie
Effect of water-pipe deposits on the kinetics of chlorine and chlorine dioxide decay in tap water
Autorzy:
Domańska, M.
Łomotowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/237377.pdf
Data publikacji:
2011
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
dezynfekcja wody
osady wodociągowe
chlor
dwutlenek chloru
stała szybkości zużycia utleniacza
water disinfection
water-pipe deposit
chlorine
chlorine dioxide
rate constant of disinfectant decay
Opis:
Niekorzystne warunki eksploatacji sieci wodociągowych, takie jak nagły spadek ciśnienia, zmiana kierunku przepływu wody czy sytuacje awaryjne mogą być przyczyną uruchomienia osadów zdeponowanych w rurociągach. Powoduje to wzrost mętności, intensywności barwy oraz zawartości żelaza w wodzie wodociągowej. W pracy przedstawiono wyniki badań przeprowadzonych w warunkach laboratoryjnych nad oddziaływaniem osadu pobranego z wewnętrznych ścianek czynnego przewodu wodociągowego na szybkość zużycia chloru i dwutlenku chloru w wodzie wodociągowej. Badania wykazały wolniejsze zużycie chloru w wodzie zawierającej cząstki osadu niż w wodzie wodociągowej bez osadu. Obecność osadu nie miała natomiast istotnego wpływu na szybkość zużycia dwutlenku chloru. Przeprowadzone badania pozwalają sądzić, że cząstki osadów przedostające się do wody wodociągowej w czasie sytuacji awaryjnych nie zwiększają jej zapotrzebowania na badane środki dezynfekcyjne.
Undesired events that occur in water distribution systems (sudden pressure drop, change in flow direction, pipe failure) may activate the deposits in the pipelines. This triggers a rise in turbidity, color intensity and iron content of the tap water. The paper here presents the results of laboratory investigations into the influence of the pipe deposit (collected from the internal walls of a pipeline in service) on the rate of chlorine and chlorine dioxide decay in tap water. The study has demonstrated that chlorine decay proceeds at a slower rate when the particles of the deposit are present in the water than when they are absent. The presence of these particles does not significantly affect the rate of chlorine dioxide decay. The results of the investigations suggest that the particles of the deposit penetrating the tap water during failure events do not increase its demand for either of the two disinfectants.
Źródło:
Ochrona Środowiska; 2011, 33, 3; 43-46
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of the free residual chlorine concentration at the ends of the water supply network: Case study of Souk Ahras city – Algeria
Zwiększanie stężenia wolnego chloru na końcach sieci wodociągowej: Przykład miasta Souk Ahras w Algierii
Autorzy:
Bensoltane, M. A.
Zeghadnia, L.
Djemili, L.
Gheid, A.
Djebbar, Y.
Powiązania:
https://bibliotekanauki.pl/articles/292423.pdf
Data publikacji:
2018
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
Algeria
drinking water
EPANET2
residual chlorine decay
Souk Ahras city
water supply network
Algieria
miasto Souk Ahras
rozkład pozostałego chloru
sieć wodociągowa
woda pitna
Opis:
The drinking-water supply sector has mostly targeted the water-borne transmission of pathogens. The most common method employed is the chlorination of drinking-water at treatment plants and in the distribution systems. In Algeria, the use of chlorine in drinking water treatment is a widespread practice. To enhance the concentration of the residual chlorine in the public water-supply system of a part of Souk Ahras city (Faubourg) (Algeria) known by its low concentration of the free residual chlorine (according to the water utility – Algérienne des Eaux: ADE investigation) especially at the point of use, practical steps were carried out. The method is a combination between numerical simulation using EPANET2 software and field measurements. Using statistical analysis the hydraulic model was calibrated and the observed values were very closer to the simulated results. The concentration was improved throughout the network after the injection of the appropriate dose.
Instytucje zaopatrzenia w wodę pitną zwracają szczególną uwagę na obecne w wodzie patogeny. Najczęściej stosowaną metodą usuwania patogenów jest chlorowanie wody w stacjach uzdatniania i w systemie dystrybucji. W Algierii użycie chloru do uzdatniania wody jest powszechnie stosowaną praktyką. Podjęto praktyczne działania, aby zwiększyć stężenie pozostałego chloru w systemie publicznego zaopatrzenia w wodę części miasta Souk Ahras (Faubourg) w Algierii znanym z małego stężenia wolnego chloru (wg badań Algérienne des Eaux: ADE), szczególnie w miejscu odbioru wody. Zastosowana metoda jest kombinacją symulacji za pomocą programu EPANET2 i pomiarów terenowych. Model hydrauliczny był kalibrowany z wykorzystaniem analizy statystycznej, a obserwowane wartości były bardzo bliskie wynikom symulacji. Korzystniejsze stężenie chloru w całej sieci uzyskano po wprowadzeniu odpowiedniej jego dawki.
Źródło:
Journal of Water and Land Development; 2018, 38; 3-9
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasięg i dynamika rozprzestrzeniania się zgnilizny wewnątrz pni jodeł w wyniku ich spałowania przez jeleniowate
Autorzy:
Pach, M.
Powiązania:
https://bibliotekanauki.pl/articles/1022649.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
jodla pospolita
uszkodzenia drzew
zgnilizna drewna
Abies alba
lesnictwo
rozprzestrzenianie sie chorob
spalowanie
drzewa lesne
abies alba
bark stripping
damage
decay spread
spreading rate
vitality
Opis:
The paper presents research results on the extent and rate of horizontal and vertical infection spread process inside fir stems as a result of bark stripping by game and factors determining infection development. The material collected in the stands of the Forest Experimental Station in Krynica (Beskid Sądecki) allows to state that the infection affected exclusively those tree rings which had been formed before wounding. The radial spread of the infection was on average 17% of the cross−sectional area of the stem at a height of the wound centre, and the axial spread was maximally up to 3 m above the ground level. The average rate of horizontal spread of decay inward the stem was 2% of the cross−sectional area per year and that of the movement of decay fungi up and down the tree – 4.7 cm per year. The most important factors affecting infection development inside the stem were: the per cent of wound closure, age and wound size, as well as tree dimensions at the time of bark stripping. The higher degree of decay significantly lowered the index value of the growth predisposition and vitality of damaged young firs.
Źródło:
Sylwan; 2005, 149, 05; 23-35
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antiviral Activities of Cu2+ Ions in Viral Prevention, Replication, RNA Degradation, and for Antiviral Efficacies of Lytic Virus, ROS-Mediated Virus, Copper Chelation
Autorzy:
Ishida, Tsuneo
Powiązania:
https://bibliotekanauki.pl/articles/1177808.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Capsid protein
Copper chelation
Copper homeostasis
Copper oxide nanoparticles
Cu2+ and Cu1+ ions
DNA/RNA virus
HSV
ROS
Viral replication
mRNA degradation or decay
Opis:
Copper has been known for decades that marked changes of micronutrient homeostasis in the host are accompanied by infection or inflammation. Copper levels in the serum are significantly elevated in response to inflammation that copper accumulates at sites of inflammation. Easily oxidized copper oxide nanoparticles (CuONPs) are widely used as catalysts that the ability of CuONPs to reduce bacterial population and virus application is enhanced. The mechanism of copper-mediated inactivation of herpes simplex virus (HSV) is by which cupric ions oxidatively damage biomolecules. Virus-mediated subjugation and modulation of host lipids during infection that the life cycle of most viruses proceeds through a series of basic steps: binding and internalization, fusion, uncoating, of the viral genome, its replication, assembly of new particles, and budding or release of the newly made viruses. The HIV-1 protein Vpu is an 81-amino-acid (16-kDa) type I which the presence of Vpu leads to the degradation of BST-2 via an endosome-lysosome degradation pathway. Oxidative degradation by a Cu-metalloenzyme, and ubiquitin-mediated degradation of cellular proteins were exploited. Copper can disrupt the lytic cycle of the Coccolithovirus. Lysins represent a novel class of anti-infectives derived from bacteriophage which lysins are bacterial cell wall hydrolytic enzymes that selectively and rapidly kill specific bacteria. Regarding copper induced cellular toxicity, several mechanisms have been proposed based on the formations of ROS by free Cu ions as cupric and cuprous ions can participate in redox reactions. ROS (O2ˉ,･OH, OHˉ), Cu+ and H2O2 play the important roles for viral inactivations. Thujaplicin-copper chelates inhibit influenza virus-induced apoptosis. Pyrrolidine dithiocarbamate as a metal ion binding agent inhibits the activity of the viral proteases of polyprotein processing and RNA replication of HRV. Chelation enables metals are capable of ligand scavenging via complexation, since reverse transcriptase enzyme inhibits the growth and replication of RNA tumor viruses. Thus, copper complex and copper chelation enhance antiviral efficacy.
Źródło:
World Scientific News; 2018, 99; 148-168
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czysto ludzka sprawa? Archeologiczne przywracanie pamięci o trudnej przeszłości przez tropienie naturo-kulturowych przemian cmentarzy wojennych
Simply human case? Archaeological revival of the memory about the difficult past, through the tracing of nature-cultural transformations of the war cemeteries
Autorzy:
Zalewska, Anna
Cyngot, Dorota
Czarnecki, Jacek
Kiarszys, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1023862.pdf
Data publikacji:
2019-09-16
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
war cemeteries
the Great War
central Poland
creation
transformation
decay
destruction
history
archaeology
remote sensing
natural-cultural phenomena and processes
difficult past
material warnings
contemporaneous archaeology
Opis:
In this article the outcomes of historical, archaeological, spatial and anthropological research concerning material remnants of the war cemeteries left by the Great War in Central Poland, in the area of Rawka and Bzura are presented. On the example of one of the four communes (Nowa Sucha) subjected to research under the project Archaeological Revival of Memory of the Great War (ARM), the processes of creation, transformation, decay, destruction and re-making present the resting places of the soldiers fallen between December 1914 and July 1915 are shown. In the first part, we sketch the output atmosphere that accompanied the primary context in which war cemeteries were established and place the war cemeteries in the network of social, formal and legal determinants. In the second part, we frame the historical and social contexts in which the resting places of the fallen soldiers of the German and Russian armies were massively created. Than, we show the difficulties associated with locating particular war cemeteries and signal strengths and obstacles in correlating results of archival research and use of remote sensing and archaeological methods in order to restore the memory of war cemeteries and establish their current and future condition as material warnings. Also we stress the looping of cultural and natural factors both in the process of protecting and destroying material condition of war cemeteries. Finally, on the example of one of the cemeteries we show how slow and arduous but at the same time promising can be the process of transformation from a forgotten/plowed cemetery into a place of/in memory, and as an agent struggling with the continuous nature-cultural transformations.
In this article the outcomes of historical, archaeological, spatial and anthropological research concerning material remnants of the war cemeteries left by the Great War in Central Poland, in the area of Rawka and Bzura are presented. On the example of one of the four communes (Nowa Sucha) subjected to research under the project Archaeological Revival of Memory of the Great War (ARM), the processes of creation, transformation, decay, destruction and re-making present the resting places of the soldiers fallen between December 1914 and July 1915 are shown. In the first part, we sketch the output atmosphere that accompanied the primary context in which war cemeteries were established and place the war cemeteries in the network of social, formal and legal determinants. In the second part, we frame the historical and social contexts in which the resting places of the fallen soldiers of the German and Russian armies were massively created. Than, we show the difficulties associated with locating particular war cemeteries and signal strengths and obstacles in correlating results of archival research and use of remote sensing and archaeological methods in order to restore the memory of war cemeteries and establish their current and future condition as material warnings. Also we stress the looping of cultural and natural factors both in the process of protecting and destroying material condition of war cemeteries. Finally, on the example of one of the cemeteries we show how slow and arduous but at the same time  promising can be the process of transformation from a forgotten/plowed cemetery into a place of/in memory, and as an agent struggling with the continuous nature-cultural transformations.
Źródło:
Folia Praehistorica Posnaniensia; 2018, 23
0239-8524
2450-5846
Pojawia się w:
Folia Praehistorica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mycobiota of thin roots showing decay of Fraxinus excelsior L. young trees
Autorzy:
Przybyl, K
Powiązania:
https://bibliotekanauki.pl/articles/41023.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Cylindrocarpon destructans
Fraxinus excelsior
young tree
decay
Cryptosporiopsis
thin root
Fusarium oxysporum
fungi
Alternaria alternata
Fusarium solani
root
mycobiota
symptom
pathogenicity
tree
Chaetomium globosum
certain fungi
Opis:
The aims of the study were to identify the fungi associated with the decay of thin roots (1-5 mm) of 1, 3 and 15-year-old Fraxinus excelsior plants and to estimate the pathogenicity of certain fungi. In total, 400 fungal isolations were performed from which 334 cultures were obtained. Altogether, 26 species of fungi were identified. The following species were most frequently obtained, independently of plant age and origin: Alternaria alternata, Chaetomium globosum, Cryptosporiopsis sp., Fusarium oxysporum, F. solani and Cylindrocarpon destructans. The last three of these were then used in an inoculation test. F. oxysporum caused the death of over 80% of 2-month-old seedlings grown in boxes containing perlite and kept in a growth chamber.
Źródło:
Dendrobiology; 2002, 48
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biosynteza enzymów ksylanolitycznych w hodowli grzyba białego rozkładu Phanerochaete chrysosporium
Biosynthesis of xylanolytic enzymes in cultural medium of white root Phanerochaete chrysosporium
Autorzy:
Gorska, E.B.
Wilgat, K.
Russel, S.
Powiązania:
https://bibliotekanauki.pl/articles/46490.pdf
Data publikacji:
2006
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:
enzymy ksylanolityczne
czynniki chorobotworcze
biosynteza
biala zgnilizna
hodowla grzybow
rozklad drewna
Phanerochaete chrysosporium
grzyby chorobotworcze
fungal culture
biosynthesis
pathogenic factor
pathogenic fungi
wood decay
xylanolytic enzyme
Opis:
Rozkład drewna w przyrodzie wywołany jest głównie przez grzyby „białej zgnilizny” z klasy Basidiomycetes, do których należy Phanerochaete chrysosporium. Celem pracy było zbadanie produkcji enzymów ksylanolitycznych w hodowli P. chrysosporium w pożywce mineralnej Czapeka z dodatkiem słomy lub otrąb pszennych. Wyniki badań wykazały, że P. chrysosporium wytwarza enzymy ksylanolityczne (endo-1,4-β- ksylanazę i β-ksylozydazę) w pożywce hodowlanej z dodatkiem obu substratów. Aktywność endo-1,4-β-ksylanazy i β-ksylozydazy zależy od temperatury i jest najwyższa odpowiednio w 70 i 60oC. Maksymalną aktywność obu enzymów stwierdzono w odczynie kwaśnym, pH = 4,6.
Degradation of wood in nature is caused mainly by white rot fungus representing Basidiomycetes, such as Phanerochaete chrysosporium. The aim of this studies was to investigate the production of xylanolytic enzymes (endo-1,4-β-xylanase and β-xylosydase) by Phanerochaete chrysosporium cultivated on Czapek mineral medium to which straw or wheat bran was added. The results showed that P. chrysosporium produced both enzymes endo-1,4-β-xylanase and β-xylosydase in culture medium with the two substrates added. The activity of endo-1,4-β-xylanase and β-xylosydase depends on temperature and it is highest at 70 and 60oC. The maximum activity of both enzymes was found for the acid reaction, pH = 4.6.
Źródło:
Acta Scientiarum Polonorum. Agricultura; 2006, 05, 2; 25-31
1644-0625
Pojawia się w:
Acta Scientiarum Polonorum. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy profilaktyka stomatologiczna ma uzasadnienie w działaniach z zakresu medycyny pracy?
Is dental prophylaxis justified in activities of occupational medicine?
Autorzy:
Jaraszek, Małgorzata
Hanke, Wojciech
Marcinkiewicz, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2082511.pdf
Data publikacji:
2022-06-20
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
próchnica
zdrowie jamy ustnej
edukacja zdrowotna
opieka profilaktyczna
czynniki ryzyka zawodowego
źródła wiedzy
dental decay
oral health
health education
preventive care
occupational risk factor
sources of knowledge
Opis:
Wstęp: Rosnąca częstość występowania próchnicy zębów u osób w każdym wieku uzasadnia potrzebę ciągłego poszukiwania skutecznych metod zapobiegania jej rozwojowi, także w kontekście oceny oddziaływania szkodliwości zawodowych. Hipoteza badawcza niniejszej pracy zakładała, że uczniowie szkoły gastronomicznej z racji specyfiki zawodu mają wymuszony, dodatkowy kontakt z żywnością, co może utrudniać im utrzymanie prawidłowej higieny jamy ustnej i w konsekwencji zwiększać zachorowalność na próchnicę.Materiał i metody: Grupę badaną stanowiło 109 mężczyzn: 55 uczniów technikum gastronomicznego (GA) oraz dla porównania 54 uczniów technikum elektryczno-informatycznego (E-I), całkowicie niezwiązanego z obróbką żywności. Badanie każdego ucznia, przeprowadzane w 2 etapach (na początku edukacji zawodowej w technikum i po 3 latach praktycznej nauki zawodu), składało się z 2 części – badania stomatologicznego oraz badania kwestionariuszowego (ocena indywidualnej higieny jamy ustnej, preferowanych artykułów spożywczych i źródeł wiedzy na temat żywienia). Wyniki: Po 3 latach obserwacji większy wzrost liczby osób z próchnicą (P > 0) zaobserwowano w grupie E-I (różnica istotna statystycznie). W grupie GA wzrost liczby osób z próchnicą był nieistotny statystycznie. Analiza źródeł wiedzy na temat zdrowego odżywiania i higieny jamy ustnej wykazała, że po 3 latach praktycznej nauki zawodu dla uczniów GA głównym źródłem wiedzy stała się szkoła i uzupełniająco internet, a dla uczniów E-I – przede wszystkim internet, a dodatkowo rodzina.Wnioski: Mniejszy przyrost częstości występowania próchnicy w grupie GA należy wiązać z realizowaną w szkole teoretyczną i praktyczną nauką na temat żywności oraz żywienia. Dlatego należy udoskonalać metody prowadzenia edukacji prozdrowotnej dotyczącej higieny jamy ustnej w szkołach zawodowych i poszerzyć standardy postępowania lekarskiego podczas obligatoryjnych badań profilaktycznych u każdego ucznia rozpoczynającego praktyczną naukę zawodu.
Background: The growing incidence of caries at all ages groups, justifies the need of constant search for effective methods of preventing, also in the context of the assessment of the impact of occupational agent. The research hypothesis assumed that due to the specificity of the profession, students of the gastronomic school have forced, additional contact with food. Thus it might be difficult for them students to maintain proper oral hygiene and, consequently, increase the incidence of tooth decay. Material and Methods: The study group comprised 109 men: 55 students of a gastronomic technical school (GA) and for comparison 54 students of an electrical and IT technical school (E-I), whose vocational education was completely unrelated to food processing. The study was performed at 2 stages (at the beginning and after 3 years of practical vocational training) and comprised of 2 parts: a dental examination and a questionnaire examination (assessment of individual oral hygiene, preferred food products and sources of knowledge about nutrition). Results: After 3 years of observation, a higher, statistically significant, increase in the number of people with caries (P > 0) was observed in the group of students from the E-I school. The analysis of the sources of knowledge on healthy eating and oral hygiene showed that after 3 years of practical vocational training, the main source of knowledge for GA students was school and the Internet, for E-I students the internet and the family. Conclusions: The smaller increase in the incidence of tooth decay in the group of GA might probably be associated with the theoretical and practical teaching of food and nutrition in the school. Therefore, the methods of conducting pro-health education on oral hygiene in vocational schools should be improved and the standards of medical conduct during obligatory preventive examinations in every student starting their practical vocational training should be extended.
Źródło:
Medycyna Pracy; 2022, 73, 3; 219-227
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected aspects of acoustic treatment of the orchestra pit
Autorzy:
Kamisiński, Tadeusz
Brawata, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/24201988.pdf
Data publikacji:
2023
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
first sound reflections
reverberation time
early decay time
reflective screens
adjustable orchestral barrier
pierwsze odbicia dźwięku
czas pogłosu
czas wczesnego zaniku
ekrany odbijające dźwięk
regulowana bariera orkiestronu
Opis:
The orchestra pit is not a friendly workplace for musicians, and the need to ensure their interaction with the stage and audience places very high demands on this interior. The aim of the considerations presented in the article was to analyse the various possibilities of acoustic adaptation of the orchestra pit against the background of obtaining the expected effects. The conducted simulation studies and the use of the results of the experimental studies carried out in the well-equipped orchestra pit of the Krakow Opera allowed for the indication of representative acoustic parameters useful for the assessment of the results of acoustic treatment. Based on the comparison of the reverberation time T20 and EDT for various variants of the orchestra pit interior, the confirmation of the legitimacy of using sound diffusing and absorbing systems was obtained. They spread the energy of the first sound reflections in time and reduce the risk to the musicians' hearing. Reflective elements and sound dispersing within the orchestral will ensure adequate audibility between the musicians.
Źródło:
Vibrations in Physical Systems; 2023, 34, 1; art. no. 2023104
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dekompozycja obumarłych drzew w ekosystemach leśnych ze szczególnym uwzględnieniem świerka, buka i jodły
Decomposition of coarse woody debris in forest ecosystems with particular reference to spruce, beech and fir
Autorzy:
Bujoczek, L.
Powiązania:
https://bibliotekanauki.pl/articles/994583.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ekologia lasu
ekosystemy lesne
drzewa obumarle
jodla
Abies
buk
Fagus
swierk
Picea
drewno jodlowe
drewno bukowe
drewno swierkowe
dekompozycja
decomposition
fragmentation
decay
coarse woody debris
fir
spruce
beech
Opis:
Dead trees are an important component of forest ecosystems, being a major reservoir of organic carbon, as well as a habitat for many species belonging to different systematic groups. The paper presents a review of the literature on wood decomposition and the factors that play an important role in this process, including its biological and physicochemical aspects. It provides recent knowledge on the rate of decomposition for the main forest tree species of Carpathian Mountains such as Norway spruce, European beech and European silver fir.
Źródło:
Sylwan; 2012, 156, 03; 208-217
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasoby oraz zróżnicowanie martwego drewna w uroczysku Wapienny Las w Nadleśnictwie Polanów
Quantity and diversity of deadwood in the Wapienny Las forest
Autorzy:
Bujoczek, L.
Bujoczek, M.
Powiązania:
https://bibliotekanauki.pl/articles/989321.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Nadlesnictwo Polanow
drzewostany
uroczysko Wapienny Las
drewno martwe
ilosc drewna martwego
miazszosc drewna
stopien rozkladu drewna
coarse woody debris
snag
volume
decay stage
size classes
managed forest
biodiversity
Opis:
Managed forests, which account for the vast majority of woodland areas in Poland, play a major role in preserving biodiversity. The objective of this work was to determine the diversity of woody microsites in a managed forest covering 27 ha of land in Polanów Forest District (north−western Poland). The study was conducted in 2014 on 20 sampling plots with an area of 0.04 ha each. An inventory of deadwood was conducted involving standing dead trees, snags, stumps, and lying deadwood with a diameter of at least 7 cm (in the case of standing deadwood, the diameter was measured at breast height). Deadwood was classified according to a five−level decay scale. The studied forest was found to contain an average of 26.9 m³/ha of deadwood from several tree species. Lying deadwood accounted for 17.3 m³/ha, standing dead trees for 0.9 m³/ha, snags for 4.9 m³/ha, and stumps for 3.8 m³/ha. Deadwood in all decay stages was identified. The most abundant category of deadwood was moderately decomposed wood in decay stage III (31.3%), followed by decay stage II (24.4%), and decay stage IV (19.7%). Deadwood (both standing and lying) was also very diverse in terms of piece diameters. The diameter at breast height of standing dead trees was up to 26 cm, and that of snags up to 50 cm. The thickest pieces of lying deadwood were 48 cm in diameter. However, pieces of less than 35 cm in diameter accounted for 96% of the total volume of lying deadwood. The volume of deadwood in the studied forest stand was very large, much higher than the average for Polish forests in general (5.8 m³/ha). Deadwood was highly varied and contributed to a substantial diversity of organisms that depend on it, as shown by previous research. Wapienny Las is an example of a managed forest that plays an important role in preserving woodland biodiversity.
Źródło:
Sylwan; 2016, 160, 06; 482-491
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prędkość propagacji fali dźwiękowej w pniach olszy czarnej Alnus glutinosa (L.) Gaertn. w zależności od temperatury
Temperature dependence of sound wave propagation in as a diagnostic tools for healthy and rotten black alder (Alnus glutinosa (L.) Gaertn.) tree trunks
Autorzy:
Orzechowski, M.
Budniak, P.
Powiązania:
https://bibliotekanauki.pl/articles/1317727.pdf
Data publikacji:
2013
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
drzewa
olsza czarna
Alnus glutinosa
pnie drzew
fale dzwiekowe
propagacja fal
predkosc dzwieku
czynniki atmosferyczne
temperatura powietrza
alder
speed of sound wave propagation
temperature
internal decay
impulse hammer
Opis:
The aim of this study was to determine how thermal conditions affect the speed of sound wave propagation, in trunks of living alder Alnus glutinosa (L.) Gaertn. trees. This method in practiced when diagnosing the presence of internal decay in standing trees. Field work was carried out four times at different temperatures (+13°C, +3°C, -7°C and -16°C) using an Impulse Hammer. There was a significant correlation between the thermal conditions and the speed of sound wave propagation. Therefore, temperature must be taken into account to correctly diagnose tree health and timber quality.
Źródło:
Leśne Prace Badawcze; 2013, 74, 4; 285-291
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of harpin and modified atmosphere packaging (MAP) on quality traits and bioactive compounds of sweet cherry fruits throughout cold storage and shelf life
Autorzy:
Aglar, E.
Powiązania:
https://bibliotekanauki.pl/articles/11860069.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
wild cherry
Prunus avium
fruit quality
qualitative trait
modified atmosphere packaging
bioactive compound
anthocyanin
total antioxidant
total phenolics
weight loss
decay ratio
fruit storage
cold storage
shelf life
Opis:
This study was conducted to investigate the effects of pre-harvest Harpin treatments and post-harvest MAP treatments on fruit quality attributes and bioactive compounds of ‘0900 Ziraat’ cherry cultivar throughout cold storage and shelf life of the fruits. Weight loss and decay ratios were significantly reduced with Harpin and MAP treatments. In general, lower L* and chroma values were measured in Harpin-treated fruits. As compared to control fruits, higher firmness, titratable acidity and vitamin C contents were measured in MAP and Harpin + MAP treated fruits throughout the cold storage and shelf life. On the other hand, lower solible solids content (SSC) values were observed in the same treatments. At harvest and shelf life measurements, higher total monomeric anthocyanin (TMA) and total phenolics (TPs) were measured in Harpintreated fruits than in control fruits. Although lower anthocyanin contents were obtained from MAP-treated fruits throughout the cold storage, higher values were observed throughout shelf life. Throughout cold storage and shelf life, MAP-treated fruits had lower total phenolics and total antioxidant activity (according to FRAP and TEAC assay) values than the control and Harpin-treated fruits. It was concluded that Harpin and MAP treatments could be used reduce weight losses and decays throughout the cold storage.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 4; 61-71
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Żywienie a próchnica zębów. Cz. IV. Wyniki badań histologicznych uzębienia szczurów białych żywionych dietami próchnicotwórczymi, uzupełnianymi witaminami A i D
Pitanie i karioz zubov. Chast' IV. Rezul'taty gistologicheskikh issledovanijj zubov bel'ykh krys pitaemykh karioznotvornymi dietami dopolnjaemymi vitaminami A i D
Nutrition and dental caries. Part IV. Results of a histological study on dentition in albino rats fed cariogenic diets supplemented with vitamins A and D
Autorzy:
Opuszynska, T.
Obersztyn, A.
Szczygiel, A.
Powiązania:
https://bibliotekanauki.pl/articles/877566.pdf
Data publikacji:
1962
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
prochnica zebow
badania histologiczne
szczeki
szczury biale
zywienie zwierzat
witamina A
witamina D
uzupelnianie niedoborow
tooth decay
histological analysis
jaw
white rat
animal feeding
vitamin A
vitamin D
supplementation
Źródło:
Roczniki Państwowego Zakładu Higieny; 1962, 13, 6
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zapas i struktura martwego drewna oraz jego znaczenie w akumulacji węgla na siedliskach lasu wilgotnego oraz olsu jesionowego
Stock and structure of deadwood and its importance in carbon accumulation on wet broadleaved forest and riparian alder forest sites
Autorzy:
Blońska, E.
Lasota, J.
Piaszczyk, W.
Powiązania:
https://bibliotekanauki.pl/articles/979629.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
siedliska lesne
siedlisko lasu wilgotnego
siedlisko olsu jesionowego
drewno martwe
zapas drewna
struktura drewna
akumulacja wegla
decay classes
deadwood
riparian alder forest
site condition
wet broadleaved forest
Opis:
The main aim of study was to present the stock and structure of deadwood in different site conditions. In total. sixteen study plots were established on wet broadleaved forest (Lw) and riparianalder forest (OlJ) sites. The objective was to determine the carbon accumulation in lying dead trees. The investigation was performed in the Czarna Rózga reserve in Central Poland (50°5937N; 20°015E). All live and dead trees were measured on each plot. The species of both live and dead trees were identified as well, and the decay class of the dead trees was assessed. Additionally, samples of different species wood from lying logs in five decay classes were taken for carbon content determination. The study was carried out in the spring of 2017. The average stock of deadwood in the Czarna Rózga reserve on the wet broadleaved forest site amounted to 47 m3/ha, while on the riparian alder forest site it equaled 52 m3/ha. The high stock of deadwood can be explained by the slowdown of decay processes by humidity and anaerobic conditions. Ash was the dominant species in the deadwood pool. Regardless of the site conditions (Lw or OlJ), the stock of ash deadwood was several times higher than the stock of live trees this species. The greater carbon stock in lying dead trees was recorded in riparian alder forest.
Źródło:
Sylwan; 2019, 163, 02; 141-149
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wegetatywnej i generatywnej ekspansji rokitnika (Hippophaë rhamnoides L.) na zwałowisku zewnętrznym Kopalni Węgla Brunatnego Bełchatów pod kątem wykorzystania w procesie rekultywacji drogą sukcesji kierowanej
Assessment of vegetative and generative expansion of sea buckthorn [Hippophae rhamnoides L.] on outer dumping ground of Belchatow Lignite Mine in terms of its application in directed succession reclamation process
Autorzy:
Bolibok, L.
Kowalczyk, M.
Drozdowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/1011789.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
rokitnik
Kopalnia Wegla Brunatnego Belchatow
ekspansja roslin
rekultywacja
tereny przemyslowe
Hippophae rhamnoides
lesnictwo
zwalowiska pogornicze
sukcesja kierowana
fomitopsis pinicola
laetiporus sulphureus
piptoporus betulinus
serpula lacrymans
brown rot
wood decay
Opis:
The paper describes the results of investigation on the range of trophic abilities and preferences of fungi causing the wood decay of the brown rot pattern. Fomitopsis pinicola, Laetiporus sulphureus, Piptoporus betulinus and Serpula lacrymans fungi were tested. Wooden samples made from wood of 25 different, both European and exotic, tree species were used. They were put on mycelium of every tested fungus. After 30, 60 and 90 days of exposition samples were weighted and the loss of their mass was calculated to compare the differences of wood destroying abilities between examined tree species. The results indicated that the range of trophic abilities in ex situ conditions of tested fungi species was much wider than in nature. All examined fungi were able to decay the wood of more tree species and their trophic preferences occurred to be different as well.
Źródło:
Sylwan; 2009, 153, 03; 203-216
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-100 z 119

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