Autor: Pérez, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An application of the representations of symmetric groups to characterizing solutions of games in partition function form
Autorzy:: Sánchez-Pérez, J.
Powiązania:: https://bibliotekanauki.pl/articles/406330.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: games in partition function form
value
representation theory
symmetric group
Opis:: A different perspective from the more “traditional” approaches to studying solutions of games in partition function form has been presented. We provide a decomposition of the space of such games under the action of the symmetric group, for the cases with three and four players. In particular, we identify all the irreducible subspaces that are relevant to the study of linear symmetric solutions. We then use such a decomposition to derive a characterization of the class of linear and symmetric solutions, as well as of the class of linear, symmetric and efficient solutions.
Źródło:: Operations Research and Decisions; 2014, 24, 2; 97-122
2081-8858
2391-6060
Pojawia się w:: Operations Research and Decisions
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Dynamism patterns of western Mediterranean cruise ports and the coopetition relationships between major cruise ports
Autorzy:: Esteve-Perez, J.
Garcia-Sanchez, A.
Powiązania:: https://bibliotekanauki.pl/articles/258786.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: cruise ports
Mediterranean ports
hierarchic patterns
coopetition
shift-share analysis
Opis:: The Mediterranean Sea has seen an increase of ports hosting cruise ships during the first fifteen years of the 21st century. The increase in cruise ship presence in Mediterranean ports is associated with the dynamism of cruise traffic in recent years, with an average annual growth of 7.45% for cruise passengers worldwide during the period of 1990-2015. Cruise traffic is a maritime business that is primarily composed of two elements, maritime affairs and tourism. This article focuses on the maritime component. With the growth of the cruise industry, cruise lines have been forced to seek new ports to meet demand in an attempt to create differentiated products based on the ports that compose the itinerary. The itinerary system of cruise traffic makes the cruise ports depend on one another to design an itinerary. This feature results in both complex geographic relationships in the design of a cruise itinerary and complex competitive/cooperative relationships between ports. The aim of this article is to present the hierarchic picture of a sample of 29 cruise ports in the Western Mediterranean region during the period of 2000-2015. To achieve this goal, a port size classification is proposed and a shift-share analysis at the inter- and intra-group size level is applied. Moreover, concentration measures are used to determine the changes in the levels of market concentration. Furthermore, a dynamic model is proposed to determine the competitive or cooperative relationships between cruise ports. The proposed model is applied to the largest ports with data from the 2001-2015 period.
Źródło:: Polish Maritime Research; 2018, 1; 51-60
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Influence of machining of EN-GJL-250 and EN-GJS-400 cast irons on tribological behavior
Autorzy:: Martinez, J.
Pereira, A.
Perez, J. A.
Mathia, T.
Powiązania:: https://bibliotekanauki.pl/articles/94140.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: tribological behavior
grey cast iron
spheroidal graphite cast iron
friction
surface wear
Opis:: In transport and, particularly in the case of the present study, naval industries, one of the major objectives of research on wear and friction is focused principally on solid lubrication. In the following paper, the tribological behaviors of two well-known, different cast irons, lamellar grey iron (EN-GJL-250) and spheroidal graphite ductile iron (EN-GJS-400), are compared and the results are analyzed. For each material's family, the surfaces’ properties are characterized at different stages of the machining process. The particular influence of diverse feed rates in a turning facing is evaluated. Moreover, some tests of the laser cladding process, which contribute to the improvement of superficial properties, are carried out; therefore, the initial morphology before surface treatment is carefully characterized and evaluated in the context of subsequent adhesion qualification. The final goal of the study is to deliver feasible initial information concerning two similar cast irons that are traditionally used in the naval industry, which would be manufactured and employed in the future as dry lubricated bearings
Źródło:: Archives of Mechanical Technology and Materials; 2015, 35; 12-22
2450-9469
Pojawia się w:: Archives of Mechanical Technology and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Stirling numbers with negative indices
Autorzy:: Yaljá Montiel-Pérez, J.
López-Bonilla, J.
Vidal-Beltrán, S.
Powiązania:: https://bibliotekanauki.pl/articles/1177734.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Gould and Schläfli formulas
Stirling numbers
Opis:: We realize applications of expressions for Stirling numbers with negative indices, in particular, we show that the formulas of Zhi-Hong Sun are consequences of the known identities of Schläfli and Gould.
Źródło:: World Scientific News; 2018, 101; 217-221
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Characterization of Non-Polar ZnO Layers with Positron Annihilation Spectroscopy
Autorzy:: Zubiaga, A.
Tuomisto, F.
Zúñiga-Pérez, J.
Muñoz-San José, V.
Powiązania:: https://bibliotekanauki.pl/articles/1811964.pdf
Data publikacji:: 2008-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.72.uj
68.55.Ln
68.37.-d
78.70.Bj
Opis:: We applied positron annihilation spectroscopy to study the effect of growth polarity on the vacancy defects in ZnO grown by metal-organic vapor phase deposition on sapphire. Both c-plane and a-plane ZnO layers were measured, and Zn vacancies were identified as the dominant defects detected by positrons. The results are qualitatively similar to those of earlier experiments in GaN. The Zn vacancy concentration decreases in c-plane ZnO by almost one order of magnitude (from high $10^{17} cm^{-3}$ to low $10^{17} cm^{-3}$) when the layer thickness is increased from 0.5 to 2 μm. Interestingly, in a-plane ZnO the Zn vacancy concentration is constant at a level of about $2×10^{17} cm^{-3}$ in all the samples with thicknesses varying from 0.6 to 2.4 μm. The anisotropy of the Doppler broadening of the annihilation radiation parallel and perpendicular to the hexagonal c-axis was also measured.
Źródło:: Acta Physica Polonica A; 2008, 114, 5; 1257-1264
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Secondary electron interactions in materials with environmental and radiological interest
Autorzy:: García, G.
Blanco, F.
de Pablos, J.
Pérez, J.
Williart, A.
Powiązania:: https://bibliotekanauki.pl/articles/148529.pdf
Data publikacji:: 2003
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: electron scattering
energy deposition
Opis:: Important environmental and radiological applications require energy deposition models including the interactions between the secondary electrons and the atoms or molecules of the medium. In this work we propose a method to obtain reliable cross-section data to be used in these models by combining total and ionisation cross-section measurements with simple calculations of the differential and integral elastic cross sections. The energy loss spectra obtained in this experiment have been also used to derive the stopping power of the considered materials for electrons. Some examples of results for atomic (Xe) and molecular (CF4) targets are presented and discussed in this paper.
Źródło:: Nukleonika; 2003, 48, 2; 103-107
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Maxwell-Lorentz Matrix
Autorzy:: Montiel-Pérez, J. Yaljá
Pendleton, J.
López-Bonilla, J.
Vidal-Beltrán, S.
Powiązania:: https://bibliotekanauki.pl/articles/1177983.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Lorentz Group
Lorentz transformations
Maxwell equations
Opis:: Lorentz invariance of Maxwell electromagnetic equations is demonstrated in two complementary ways: first, we give a pedestrian review with three-vector equations, and we then express Maxwell equations in a four-vector matrix form (the Maxwell-Lorentz matrix) which demonstrates the intimate connection of Maxwell equations with the Lorentz group. Each Maxwell-Lorentz matrix component is the product of three matrices: a derivative matrix, a 4x4 Lorentz group generator matrix, and an electromagnetic field matrix. We obtain rotary Lorentz transformations of the electromagnetic field matrix from Lorentz equation matrices. We then transform the derivative and electromagnetic matrices and obtain an explicit matrix demonstration of Lorentz invariance of Maxwell equations. To obtain this result, we express all transformation matrices in exponential form to facilitate the application of simple Lorentz group algebra. The pedestrian approach illustrates what the Lorentz group matrix approach actually accomplishes and helps one to gain some appreciation of group theory methods.
Źródło:: World Scientific News; 2018, 96; 59-82
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Research object as mechanism for ensuring research experiment reproducibility within virtual research environment
Autorzy:: Krystek, M.
Mazurek, C.
Palma, R.
Pukacki, J.
Gomez-Perez, J. M.
Powiązania:: https://bibliotekanauki.pl/articles/1940554.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Gdańska
Tematy:: research object
virtual research environment
Earth Science
semantic web
preservation
evolution
obiekt badawczy
wirtualne środowisko badawcze
nauki o ziemi
sieć semantyczna
ochrona
ewolucja
Opis:: A Research Object (RO) is defined as a semantically rich aggregation of resources that bundles together essential information relating to experiments and investigations. This information is not limited merely to the data used and the methods employed to produce and analyze such data, but it may also include the people involved in the investigation as well as other important metadata that describe the characteristics, inter-dependencies, context and dynamics of the aggregated resources. As such, a research object can encapsulate scientific knowledge and provide a mechanism for sharing and discovering assets of reusable research and scientific knowledge within and across relevant communities, and in a way that supports reliability and reproducibility of investigation results. While there are no pre-defined constraints related to the type of resources a research object can contain, the following usually apply in the context of scientific research: data used and results produced; methods employed to produce and analyze data; scientific workflows implementing such methods; provenance and settings; people involved in the investigation; annotations about these resources, which are essential to the understanding and interpretation of the scientific outcomes captured by a research object. The example research object contains a workflow, input data and results, along with a paper that presents the results and links to the investigators responsible. Annotations on each of the resources (and on the research object itself) provide additional information and characterize, e.g. the provenance of the results. Therefore, exploitation of the RO model should be considered as a way to provide additional reliability and reproducibility of the research. The concept of the RO was introduced to the environment created in the EVER-EST project in the form of Virtual Research Environment (VRE). a group of Earth Scientists, who are observing, analyzing and modeling processes that take place on land and see, was examined against their needs and expectations about the possible improvements in their scientific work. The results show that scientist expectations are focused on knowledge sharing and reuse, and new forms of scholarly communications beyond pdf articles as supporting tools of knowledge cross-fertilization between their members. The Research Object concept seems a natural answer for these needs. However, the model, in order to be sufficient and usable, must become a part of the working environment and needs to be integrated with the actual tools. Therefore, great efforts have been undertaken to create a generic, technical solution – VRE , which implements the expected functionalities. In this article we present a concept of the VRE as a tool that takes advantage of the Research Object model in order to integrate and simplify the information exchange, as well as persist, share and discover assets of the reusable research. Moreover, we are presenting example scenarios of the VRE usage in the four different Earth Science domains.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2017, 21, 4; 379-389
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Flotacja jonowa cynku z rozcieńczonych kwaśnych roztworów wodnych
Zinc ion flotation from diluted aqueous acid solutions
Autorzy:: Kawalec-Pietrenko, B.
Konopacka-Łyskawa, D.
Rybarczyk, P.
Perez, J.
Perez, A.
Powiązania:: https://bibliotekanauki.pl/articles/2070837.pdf
Data publikacji:: 2009
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: flotacja jonowa
cynk
prędkość powietrza
stężenie substancji powierzchniowo-czynnej
ion floation
zinc
air flow rate
surfactant concentration
Opis:: Usuwano jony cynku z modelowych roztworów o pH = 5 w procesie separacji pianowej. Wyznaczono zmiany stopnia wyflotowania i współczynnika wzbogacenia w zależności od prędkości przepływu powietrza oraz stężenia siarczanu dodecylosodowego jako surfaktantu anionowego.
Zinc ions were removed from model solutions of pH = 5 by foam separation process. Values of removal ratio and the enrichment coefficient were determined in a form of dependence of gas velocity and n-dodecyl sodium sulfate concentration as anionie surfactant.
Źródło:: Inżynieria i Aparatura Chemiczna; 2009, 6; 102-103
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Some applications of Noether’s theorem
Autorzy:: Montiel-Pérez, J. Yaljá
López-Bonilla, J.
López-Vázquez, R.
Vidal-Beltrán, S.
Powiązania:: https://bibliotekanauki.pl/articles/1166045.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Complex Riemann-Silberstein vector
Duality rotations
Ignorable variable
Invariance of the action
Lanczos variational method
Linear differential equation of second order
Maxwell equations
Noether’s theorem
Variation of parameters
Variational symmetry
Opis:: If the action S= ∫_(t_1)^(t_2)▒〖L(q,〗 (q,) ̇t) dt is invariant under the infinitesimal transformation t ̃=t+ε τ(q,t), q ̃_r= q_r+ε ξ_r (q,t),r=1,… ,n, with ε=constant ≪1, then the Noether’s theorem permits to construct the corresponding conserved quantity. The Lanczos approach employs to ε= q_(n+1) as a new degree of freedom, thus the Euler-Lagrange equation for this new variable gives the Noether’s constant of motion. Torres del Castillo and Rubalcava-García showed that each variational symmetry implies the existence of an ignorable coordinate; here we apply the Lanczos approach to the Noether’s theorem to motivate the principal relations of these authors. The Maxwell equations without sources are invariant under duality rotations, then we show that this invariance implies, via the Noether’s theorem, the continuity equation for the electromagnetic energy. Besides, we demonstrate that if we know one solution of p(x)y''+q(x)y'+r(x)y=0, then this Lanczos technique allows obtain the other solution of this homogeneous linear differential equation.
Źródło:: World Scientific News; 2018, 106; 69-80
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Temperature increase associated with plastic deformation under dynamic compression: application to aluminium alloy AL 6082
Wzrost temperatury wywołany plastycznym odkształceniem przy dynamicznym ściskaniu – analiza stopu aluminium Al 6082
Autorzy:: Perez-Castellanos, J.-L.
Rusinek, A.
Powiązania:: https://bibliotekanauki.pl/articles/280469.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: infrared thermography
plastic strain
adiabatic heating
Hopkinson bar
Opis:: The temperature increase associated with plastic deformation of a material under loading may be measured using several techniques such as infrared thermography (IRT). The present work investigates the temperature increase at different high strain rates and initial test temperatures, using an aluminium alloy Al 6082. A Split Hopkinson Pressure Bar (SHPB) was applied to induce high strain rates to the material and an infrared camera was used to measure the temperature increase. Numerical simulations of dynamic tests were performed to calculate the temperature increase and to gain a better understanding of the process by local measurements. Thus, a detailed finite-elements model was developed to simulate the dynamic compression test. The fraction of plastic work converted into heat was estimated using the Zehnder model. Numerical results in terms of the strain rate and initial temperature effect on the material temperature increase are reported and compared with experiments.
Wzrost temperatury w materiale związany z plastycznym odkształcaniem może być rejestrowany różnymi metodami, w tym m.in. techniką termografii podczerwieni (IRT). Prezentowana praca poświęcona jest badaniom wzrostu temperatury przy różnym tempie odkształceń i temperatury początkowej próbek wykonanych ze stopu aluminium Al 6082. W eksperymentach użyto zmodyfikowanego pręta Hopkinsona do generowania szybko-zmiennych odkształceń w materiale i jednocześnie dokonywano pomiarów temperatury za pomocą kamery termowizyjnej. Przeprowadzono także symulacje numeryczne przebiegu przyrostu temperatury pozwalające na lepsze zrozumienie zachodzących procesów na podstawie lokalnych pomiarowym. W tym celu zbudowano szczegółowy model bazujący na metodzie elementów skończonych, który przeanalizowano pod kątem dynamicznego ściskania. Część pracy odkształcenia plastycznego zamienianego w ciepło oszacowano za pomocą modelu Zehndera. Wyniki obliczeń uwzględniających tempo odkształceń i temperaturę początkową na jej przyrost w badanym materiale zweryfikowano z rezultatami doświadczeń.
Źródło:: Journal of Theoretical and Applied Mechanics; 2012, 50, 2; 377-398
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Spacetimes embedded into E6
Autorzy:: Montiel-Pérez, J. Yaljá
Caltenco, J. H.
Linares y M., R.
López-Bonilla, J.
Powiązania:: https://bibliotekanauki.pl/articles/1164540.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: E6
Embedding of Riemannian 4-spaces
Local and isometric embedding
Opis:: We study the local and isometric embedding of Riemannian spacetimes into the pseudo-Euclidean flat E6. Our main purpose is to pinpoint the known results with the corresponding references, and to indicate the main routes and connections from here to the still open problems in the field. Some new results are also included in order to round off our discussion.
Źródło:: World Scientific News; 2018, 107; 31-45
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Design, Manufacture and Characterization of an Acoustic Barrier Made of Multi-Phenomena Cylindrical Scatterers Arranged in a Fractal-Based Geometry
Autorzy:: Casteneira-Ibanez, S.
Rubio, C.
Romero-Garcia, V.
Sanchez-Perez, J. V.
Garcia-Raffi, L. M.
Powiązania:: https://bibliotekanauki.pl/articles/176662.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: acoustic arrays
acoustic attenuation
acoustic wave absorption
acoustic wave scattering
phononic crystals
acoustic barrier
physical effect of sound
Opis:: In this work we present the design and the manufacturing processes, as well as the acoustics standard- ization tests, of an acoustic barrier formed by a set of multi-phenomena cylindrical scatterers. Periodic arrangements of acoustic scatterers embedded in a fluid medium with different physical properties are usually called Sonic Crystals. The multiple scattering of waves inside these structures leads to attenuation bands related to the periodicity of the structure by means of Bragg scattering. In order to design the acoustic barrier, two strategies have been used: First, the arrangement of scatterers is based on fractal geometries to maximize the Bragg scattering; second, multi-phenomena scatterers with several noise con- trol mechanisms, as resonances or absorption, are designed and used to construct the periodic array. The acoustic barrier reported in this work provides a high technological solution in the field of noise control.
Źródło:: Archives of Acoustics; 2012, 37, 4; 455-462
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Redefinition of the scarcity price: lessons and recommendations from the Colombian Electricity Market
Autorzy:: Llanos-Pérez, E. J.
Hinestroza-Olascuaga, L. M.
Powiązania:: https://bibliotekanauki.pl/articles/136158.pdf
Data publikacji:: 2017
Wydawca:: EEEIC International Barbara Leonowicz Szabłowska
Tematy:: Columbia
energy system
energy market
energy planning
market price
Opis:: The Colombian government introduced a capacity market in order to promote the diversification in the energy matrix and protect users from high prices derived from dry seasonal events. Unfortunately, the flaws in the scarcity price definition- a mechanism that activates the capacity market obligation and sets a cap price for the spot market- have led into a market failure. Specifically, some generation plants have been forced to be unavailable because their variable costs are significantly higher than the scarcity price. This paper presents a qualitative and quantitative analysis of the Colombian Electricity system, with a particular emphasis on the definition of the scarcity price. Results present lessons and recommendations for policy makers based on the experience of the Colombian Electricity Market, highlighting the need of a new definition of the scarcity price and a different focus on the energy planning scheme.
Źródło:: Transactions on Environment and Electrical Engineering; 2017, 2, 1; 19-26
2450-5730
Pojawia się w:: Transactions on Environment and Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Spring-loaded winch band brakes as tools to improve safety during mooring operations on ships
Autorzy:: Iglesias-Baniela, S.
Pérez-Canosa, J. M.
Cid-Bacorelle, D.
Powiązania:: https://bibliotekanauki.pl/articles/1841578.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: berthing operations
winch band brakes
mooring operations
brake holding capacity
minimum breaking load
Liquefied Natural Gas
LNG
Hydraulic Release
mooring line
Opis:: Some recent accident reports involving large vessels in mooring operations or breaking away from their moorings conclude that brakes of mooring winches do not render before line parts. As the potential loss of life is high, the utmost attention on-board must be paid to minimise this inherent risk. When the load on the mooring lines becomes overloaded beyond the pre-set levels, mooring winches band brakes have the safety function of rendering and allowing the line to shed this load before its potential breaking and the subsequent snap-back. As a preventive measure against breaking, the pre-set level, known as Brake Holding Capacity (BHC), must be below the Minimum Breaking Load (MBL) of the line. In this paper, the authors analyse concerns that can arise from those with conventional screw manually-applied band brakes regarding their BHC reliability. Thus, in order to improve safety, the advantages of the spring-applied band brakes with manual setting and release or with hydraulic release are highlighted. Finally, the paper shows a typical procedure using a hydraulic jack for brake testing the winch of a Liquefied Natural Gas (LNG) ship to fix their BHC in order to hold 60% of the MBL of the mooring line.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 3; 711-719
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:: The oldest post-Paleozoic (Ladinian, Triassic) brachiopods from the Betic Range, SE Spain
Autorzy:: Baeza-Carratala, J.F.
Perez-Valera, F.
Perez-Valera, J.A.
Powiązania:: https://bibliotekanauki.pl/articles/22178.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:: Triassic brachiopods from the Betic Range were unknown hitherto. Herein we describe the first brachiopod occurrences in the early Ladinian of this domain referable to a new genus and species Misunithyris goyi derived from three localities of the south-Iberian Triassic outcrops. The analysis of internal and external characters of this brachiopod allowed to characterize systematically and biogeographically this fauna in a chronostratigraphic interval when the paucity of brachiopod records is attributable to the entire peri-Iberian epicontinental platform system established in the westernmost Tethyan margin. The new record is endemic to the Betic Range and represents a new faunal constituent of the multicostate zeillerids stock. This fauna inhabited the epicontinental seas of the Sephardic bioprovince since a closer affinity with the low-latitude Tethyan assemblages is revealed. The possible linkage of the Triassic stock with the Early–Middle Jurassic multicostate zeillerid representatives suggests feasible phylogenetic relationships between both groups.
Źródło:: Acta Palaeontologica Polonica; 2018, 63, 1
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:: Body mass estimation in amphicyonid carnivoran mammals: A multiple regression approach from the skull and skeleton
Autorzy:: Figueirido, B.
Perez-Claros, J.A.
Hunt, R.M.Jr.
Palmqvist, P.
Powiązania:: https://bibliotekanauki.pl/articles/21366.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: body mass
estimation
amphicyonid
mammal
skull
skeleton
Mammalia
Carnivora
Amphicyonidae
multiple regression
paleontology
Opis:: The body masses of sixteen species of amphicyonids (Mammalia, Carnivora, Amphicyonidae) from the New and Old World were estimated on the basis of 86 osteological variables measured from the craniodental (N = 44) and postcranial (N = 42) skeleton of living species of Canidae and Ursidae. Given the absence of complete and well preserved skeletons of amphicyonids in the fossil record, multiple regression functions were derived separately from measurements taken from the mandible, the cranium and the major limb bones. The accuracy of the regression functions was evaluated using the percentage prediction error and the percentage standard error of the estimates. Mass values were calculated with these equations using measurements taken in adult individuals from a number of daphoenine and amphicyonine species. Results obtained show that three distinct size classes of amphicyonids emerged through the evolutionary history of the “beardog” family and that these size classes correlate with presumably different ecomorphs. Quantitative estimates of body size of amphicyonids are critical for deciphering the paleobiology of this poorly understood family of large fissiped carnivorans and can be used for placing it within a broader ecological context.
Źródło:: Acta Palaeontologica Polonica; 2011, 56, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:: DVB-T Channels Measurements for the Deployment of Outdoor REM Databases
Autorzy:: Kliks, A.
Kryszkiewicz, P.
Cichoń, K.
Umbert, A.
Perez-Romero, J.
Casadevall, F.
Powiązania:: https://bibliotekanauki.pl/articles/307830.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: channel measurements
DVB-T
spectrum occupancy
Radio Environment Maps
Opis:: In this paper the analysis of the spectrum occupancy in the TV band is provided based on the outdoor measurements campaigns carried out in Poznań, Poland in 2013 and 2014. The goal of this work is to discuss the stability and other important features of the observed spectrum occupancy in the context of outdoor Radio Environment Maps database deployment. Reliable deployment of these databases seems to be one of the critical points in practical utilization of the TV White Spaces for cognitive purposes inside buildings and in densely populated cities. The results obtained for outdoor scenario are briefly compared with the previous measurements conducted indoors in Barcelona, Spain, and in Poznań, Poland.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 3; 42-52
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: The acute bacterial toxicity of the selenocyanate anion and the bioprocessing of selenium by bacterial cells
Autorzy:: Montes, R. A.
Pradenas, G. A.
Pérez-Donoso, J. M.
Vásquez, C. C.
Chasteen, T. G.
Powiązania:: https://bibliotekanauki.pl/articles/363098.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: bioremediacja
selenowe aniony tlenowe
SeCN
SeO3
SeO4
bioremediation
selenium oxyanions
Opis:: A water-soluble anion containing selenium, selenocyanate (SeCN-), is produced in various industrial settings including petrochemical refining and mining wastewaters and is difficult to remove using common chemical or physical processes. The work described was aimed at determining the relative acute toxicity of SeCNby evaluating its minimal inhibitory and minimal bactericidal concentrations for 1) a bacterium (LHVE) that produces volatile selenium-containing derivatives in cultures containing added SeCNand 2) for a sensitive E. coli wild-type strain. These measures of toxicity were compared to those of selenate and selenite, the oxyanions of selenium commonly found in the environment. Cultures of LHVE amended with SeCNon agar plates produced red, elemental selenium after three days. As far as we know this is the first evidence for the biological production of elemental Se by a metalloid-resistant bacterium exposed to selenocyanate. Bioprocessing of selenite and SeCNby both types of bacteria, as analyzed by inductively coupled plasma spectrometry, demonstrated that LHVE more successfully incorporates or precipitates Se compared to E. coli.
Źródło:: Environmental Biotechnology; 2012, 8, 1; 32-38
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:: Analysis and Classification of the Tools for Assessing the Risks Associated With Industrial Machines
Autorzy:: Paques, J. J.
Gauthier, F.
Perez, A.
Powiązania:: https://bibliotekanauki.pl/articles/90856.pdf
Data publikacji:: 2007
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: risk
assessment
estimation
methods
tools
safety
machinery
Opis:: To assess and plan future risk-analysis research projects, 275 documents describing methods and tools for assessing the risks associated with industrial machines or with other sectors such as the military, and the nuclear and aeronautics industries, etc., were collected. These documents were in the format of published books or papers, standards, technical guides and company procedures collected throughout industry. From the collected documents, 112 documents were selected for analysis; 108 methods applied or potentially applicable for assessing the risks associated with industrial machines were analyzed and classified. This paper presents the main quantitative results of the analysis of the methods and tools.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2007, 13, 2; 173-187
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:: Submillimeter-Wave Oscillations in Recessed InGaAs/InAlAs Heterostructures: Origin and Tunability
Autorzy:: Pérez, S.
Mateos, J.
González, T.
Powiązania:: https://bibliotekanauki.pl/articles/1505462.pdf
Data publikacji:: 2011-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 85.30.Fg
07.57.Hm
73.40.Kp
Opis:: By means of an ensemble Monte Carlo simulator, the appeareance of THz oscillations in InAlAs/InGaAs slot diodes is predicted when the applied bias exceeds the threshold for intervalley transfer. Such high frequency is attained by the presence of a Gunn-like effect in the recess-to-drain region of the device channel whose dynamics is controlled by ballistic Γp valley electrons. In this work we explain the mechanism at the origin of this effect and also the influence of the bias conditions, δ-doping, recess-to-drain distance and recess length on the frequency of the ultrafast Gunn-like oscillations. The simulations show that a minimum value for the δ-doping is necessary to have enough carrier concentration under the recess and allow the oscillations to emerge. Finally, we show that shortening the devices (small recess and recess-to-drain lengths) increases the oscillation frequency, so provides an interesting frequency tunability of this THz source.
Źródło:: Acta Physica Polonica A; 2011, 119, 2; 111-113
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:: On operator ideals related to (p,σ)-absolutely continuous operators
Autorzy:: López Molina, J. A.
Sánchez Pérez, E. A.
Powiązania:: https://bibliotekanauki.pl/articles/1206151.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: tensor norms
operator ideals
(p,σ)-absolutely continuous operators
$g_{p,σ}$-nuclear and $g_{p,σ}$ integral operators
Opis:: We study tensor norms and operator ideals related to the ideal $P_{p,σ}$, 1 < p < ∞, 0 < σ < 1, of (p,σ)-absolutely continuous operators of Matter. If α is the tensor norm associated with $P_{p,σ}$ (in the sense of Defant and Floret), we characterize the $(α')^t$-nuclear and $(α')^t$- integral operators by factorizations by means of the composition of the inclusion map $L^r(μ) → L^1(μ) + L^p(μ)$ with a diagonal operator $B_w:L^{∞}(μ) → L^r(μ)$, where r is the conjugate exponent of p'/(1-σ). As an application we study the reflexivity of the components of the ideal $P_{p,σ}$.
Źródło:: Studia Mathematica; 2000, 138, 1; 25-40
0039-3223
Pojawia się w:: Studia Mathematica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:: A new turtle species of Brodiechelys from the Early Cretaceous of Spain: Systematic and palaeobiogeographic implications
Autorzy:: Perez-Garcia, A.
Gasaulla, J.M.
Ortega, F.
Powiązania:: https://bibliotekanauki.pl/articles/946018.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: testudines
pan-cryptodira
xinjiangchelyidae
brodiechelys
cretaceous
europe
spain
Opis:: Brodiechelys brodiei is an Early Cretaceous turtle from Great Britain, the only species of the genus. This taxon has been shown in recent phylogenies to be closely related to Xinjiangchelyidae and therefore could be the only representative of this group in Europe. Here, we present several specimens from the Early Cretaceous Maestrazgo Basin, in the Iberian Range of Spain attributed to the British genus, and to a new species, Brodiechelys royoi. This discovery shows that, as previously observed with terrestrial turtles, some freshwater turtle taxa had a wide European distribution during the Early Cretaceous, being present in both Britain and the Iberian Peninsula. This study sheds new light on the phylogenetic position of this enigmatic genus, supporting its attribution to Xinjiangchelyidae, a clade whose presence has been previously confirmed exclusively from the Middle Jurassic to Early Cretaceous of Asia. We propose that another recently identified taxon from the Iberian Peninsula (i.e., Larachelus morla) is also a member of this clade. Recent studies have identified several continental taxa of the clade that included the members of “Macrobaenidae” and “Sinemydidae” in Europe. This study provides new evidence of close relationships between the Early Cretaceous turtle faunas from Europe and Asia.
Źródło:: Acta Palaeontologica Polonica; 2014, 59, 2; 333-342
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:: Bio-methanization of organic fraction from municipal solid waste: temperature effects
Autorzy:: Fernández-Rodríguez, J.
Pérez, M.
Romero, L. I.
Powiązania:: https://bibliotekanauki.pl/articles/779264.pdf
Data publikacji:: 2013
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: anaerobic digestion
OFMSW
mesophilic
thermophilic
methane
Opis:: The main objective of this study was to analyse the development of dry anaerobic digestion process of OFMSW in batch reactors under two temperature ranges, thermophilic (55°C) and mesophilic (35°C). The experimental results lead to the conclusion that the thermophilic range has a greater rate of hydrolysis and is therefore more effective to degrade wastes, shortening the overall operating time. For example, the hydrolytic step in the thermophilic (T) process lasted an average of 8 days versus 14 days in the mesophilic (M) range. The methanogenic phase lasted for 18 and 29 days in the T and M processes, respectively. The mesophilic range showed higher removal of the organic effluent but with greater uptime requirements. Moreover, the thermophilic range showed greater productivities than the mesophilic range, and the productivities were approximately doubled in terms of the produced biogas from a given amount of consumed organic matter.
Źródło:: Polish Journal of Chemical Technology; 2013, 15, 2; 99-106
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:: Heating source localization in a reduced time
Autorzy:: Beddiaf, S.
Autrique, L.
Perez, L.
Jolly, J. C.
Powiązania:: https://bibliotekanauki.pl/articles/331120.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: parameter identification
inverse heat conduction problem
optimal observation
source localization
identyfikacja parametryczna
odwrotne zagadnienie termiczne
obserwacja optymalna
lokalizacja źródła
Opis:: Inverse three-dimensional heat conduction problems devoted to heating source localization are ill posed. Identification can be performed using an iterative regularization method based on the conjugate gradient algorithm. Such a method is usually implemented off-line, taking into account observations (temperature measurements, for example). However, in a practical context, if the source has to be located as fast as possible (e.g., for diagnosis), the observation horizon has to be reduced. To this end, several configurations are detailed and effects of noisy observations are investigated.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2016, 26, 3; 623-640
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 26.

Tytuł:: The role of mutagenesis in the modification of the fatty acid profile of oilseed crops
Autorzy:: Velasco, L
Perez-Vich, B.
Fernandez-Martinez, J.M.
Powiązania:: https://bibliotekanauki.pl/articles/2043643.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: oil seed
mutagenesis
induced mutation
fatty acid
crop
modification
Źródło:: Journal of Applied Genetics; 1999, 40, 3; 185-209
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 27.

Tytuł:: Plant hemoglobins can be maintained in active form by reduced flavins and confer tolerance to nitro-oxidative stress
Autorzy:: Sainz, M.
Perez-Rontome, C.
Ramos, J.
Mulet, J.
James, E.
Becana, M.
Powiązania:: https://bibliotekanauki.pl/articles/81132.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: plant
hemoglobin
nitric oxide
nonsymbiotic hemoglobin
flavin
chloroplast
thylakoid
oxidative stress
methyl viologen
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 28.

Tytuł:: Temperature effects on the parametric generation in a water-filled acoustical resonator
Autorzy:: Pérez-Arjona, I.
Cebrecos, A.
Sánchez-Morciillo, V. J.
Espinosa, V.
Powiązania:: https://bibliotekanauki.pl/articles/332260.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: We consider the problem of parametric sound generation in an acoustic interferometer containing a fluid. We have taken explicitly into account both the influence of the nonlinearly generated second harmonic and the effect of the unavoidable rising of the temperature due to the acoustic wave. Two main new features under these considerations can be observed. On one hand, the fundamental field does not achieve a saturating value when subharmonics fields appear, but still grows with the driving. On the other hand, the subharmonics fields can exist only for a limited range of driving value, due to the dependence of the cavity resonances with the temperature of the medium. The experimental setup was designed and we show here the experimental measurements, which are in good agreement with the predicted values for the mode amplitudes and the parametric threshold.
Źródło:: Hydroacoustics; 2013, 16; 197-202
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 29.

Tytuł:: Latitude error in compass deviation. Mathematical method to determine the latitude error in magnetic compass deviation
Autorzy:: Basterretxea, I. I.
Vila- Muñoz, J. A.
Perez -Labajos, C. A.
Powiązania:: https://bibliotekanauki.pl/articles/258974.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: optimal exact coefficients
average deviation
latitude error
Opis:: This article aims to provide the seafarer with a tool to calculate the deviation for a righted ship in any geographical position using only the information available on board. In this way the accidental errors in the deviation card are reduced and the latitude error is made negligible. Moreover, an experimental application of this method is carried out on board a tanker to compare the latitude error in different positions at sea.
Źródło:: Polish Maritime Research; 2014, 3; 25-31
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 30.

Tytuł:: Chemotaxonomic study on Thymus x toletanus Ladero and its parental species
Autorzy:: Salas, J B
Perez-Alonso, M.J.
Tellez, T.R.
Pardo, F.M.V.
Powiązania:: https://bibliotekanauki.pl/articles/57327.pdf
Data publikacji:: 2010
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: chemotaxonomy
Thymus x toletanus
parental species
Thymus mastichina
Thymus villosus ssp.lusitanicus
hybrid
plant cultivation
Opis:: We analysed the essential oils of cultivated material of Thymus xtoletanus Ladero and its parents, Th. mastichina (L.) L. and Th. villosus subsp. lusitanicus (Boiss.) Coutinho, with seeds from the same locality in the centre of the Iberian Peninsula. The essential oil of Th. xtoletanus, which had not been analyzed previously, presented 1,8-cineole as the major component (25.5%), as was also the case for Th. mastichina (76.1%). Other components with a major presence in Th. xtoletanus and Th. villosus subsp. lusitanicus were [(Z)-β-ocimene (8.1%); camphor (4.5%); sabinene (3.2%); α-pinene (2.8%)], and [(Z)-β-ocimene (4.1%), camphor (9.8%), sabinene (2.8%), α-pinene (7.1%)], respectively. However, in the hybrid the components β-phelandrene (14.5%), limonene (6.9%), (E)-γ-bisabolene (3.5%), and viridiflorol (3.3%) stood out, inter alia, whereas their presence in the parents was limited. The study confirms the hybrid origin of Th. xtoletanus as intermediate between Th. mastichina and Th. villosus subsp. lusitanicus.
Źródło:: Acta Societatis Botanicorum Poloniae; 2010, 79, 2; 125-128
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 31.

Tytuł:: Subdiffractive propagation in a bidimensional sonic crystal
Autorzy:: Sanchez-Morcillo, V.
Perez-Arjona, I.
Redondo, J.
Espinosa, V.
Staliunas, K.
Powiązania:: https://bibliotekanauki.pl/articles/332514.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: Sonic crystals are media with a periodic modulation of the acoustic parameters, as the density and the bulk modulus. They have recently attracted a great interest, because of their potential applications in the control of sound propagation, used as reflectors, focusers or waveguides. All these properties are related with the dispersion introduced by the crystal anisotropy. We report on the nondiffractive propagation of sound in two-dimensional sonic crystals. It is shown that, for given frequencies and directions of incidence, a narrow sonic beam can propagate without diffractive broadening. Such nondiffractive sonic beams exist in crystals with perfect symmetry, and do not require the presence of defects, differently from other waveguiding phenomena reported previously. The cancellation of diffraction has been predicted using the plane-wave expansion method to evaluate the dispersion surfaces of the crystal and the spatial dispersion (isofrequency) curves. It occurs for frequencies and wavevectors for which dispersion curves have zero curvature, denoting a transition between focusing and defocusing regimes. By means of perturbative techniques, a simple analytical expression for the nondiffractive conditions has been obtained. The phenomenon is also demonstrated by numerical integration of the acoustic equations using the FDTD technique with very good agreement with the preliminary experimental results. Support from Spanish MEC, project FIS2005-07931-C03-01, is acknowledged.
Źródło:: Hydroacoustics; 2007, 10; 85-92
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 32.

Tytuł:: A workflow-oriented approach to Propagation Models in Heliophysics
Autorzy:: Pierantoni, G.
Carley, E.
Byrne, J.
Perez-Suarez, D.
Gallagher, P. T.
Powiązania:: https://bibliotekanauki.pl/articles/305701.pdf
Data publikacji:: 2014
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: heliophysics
workflow
TAVERNA
Coronal Mass Ejection
propagation models
Opis:: The Sun is responsible for the eruption of billions of tons of plasma and the generation of near light-speed particles that propagate throughout the solar system and beyond. If directed towards Earth, these events can be damaging to our tecnological infrastructure. Hence there is an effort to understand the cause of the eruptive events and how they propagate from Sun to Earth. However, the physics governing their propagation is not well understood, so there is a need to develop a theoretical description of their propagation, known as a Propagation Model, in order to predict when they may impact Earth. It is often difficult to define a single propagation model that correctly describes the physics of solar eruptive events, and even more difficult to implement models capable of catering for all these complexities and to validate them using real observational data. In this paper, we envisage that workflows offer both a theoretical and practical framework for a novel approach to propagation models. We define a mathematical framework that aims at encompassing the different modalities with which workflows can be used, and provide a set of generic building blocks written in the TAVERNA workflow language that users can use to build their own propagation models. Finally we test both the theoretical model and the composite building blocks of the workflow with a real Science Use Case that was discussed during the 4th CDAW (Coordinated Data Analysis Workshop) event held by the HELIO project. We show that generic workflow building blocks can be used to construct a propagation model that succesfully describes the transit of solar eruptive events toward Earth and predict a correct Earth-impact time.
Źródło:: Computer Science; 2014, 15 (3); 271-291
1508-2806
2300-7036
Pojawia się w:: Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 33.

Tytuł:: Phenolic Compounds in Agro-Industrial Waste of Mango Fruit: Impact on Health and Its Prebiotic Effect – a Review
Autorzy:: Nicolás García, Mayra
Borrás Enríquez, Anahí J.
González Escobar, Jorge L.
Calva Cruz, Oscar D.
Pérez Pérez, Viridiana
Sánchez Becerril, Mayra
Powiązania:: https://bibliotekanauki.pl/articles/16538530.pdf
Data publikacji:: 2023-02-21
Wydawca:: Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:: mango processing
mango wastes
phytochemicals
biological properties
gut health
Opis:: The fruit processing industry generates huge amounts of waste annually, causing severe environmental problems. Mango processing produces around 20 million tons of wastes from the non-consumed fraction, mainly peels and seeds, which constitute 30–60% of the fruit weight. However, various phytochemicals found in these residues have been implicated in preventing cancer and also cardio-metabolic and gastrointestinal diseases. Particularly, phenolic compounds hold a promising potential to be utilized as modulatory agents of the human gut microbiota (prebiotics-like actions). This review article mainly discusses the effect of phenolics from mango wastes on gut microbiota modulation and its beneficial repercussions for human health. Moreover, it also discusses the importance of phenolic compounds of mango peel and seed kernel residues, their extraction, identification, and quantification.
Źródło:: Polish Journal of Food and Nutrition Sciences; 2023, 73, 1; 5-23
1230-0322
2083-6007
Pojawia się w:: Polish Journal of Food and Nutrition Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 34.

Tytuł:: Relative infaunal bivalve density assessed from split beam echosounder angular information
Autorzy:: Sanchez-Carnero, N.
Rodriguez-Perez, D.
Zaragoza, N.
Espinosa, V.
Freire, J.
Powiązania:: https://bibliotekanauki.pl/articles/48622.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: shellfish
bivalve
textural feature
stock assessment
acoustic technique
split-beam echosounder
mapping
monitoring
Źródło:: Oceanologia; 2014, 56, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 35.

Tytuł:: Acoustic Scattering of 3D Complex Systems Having Random Rough Surfaces by Scalar Integral Equations
Autorzy:: Guel-Tapia, J. A.
Villa-Villa, F.
Mendoza-Suárez, A.
Pérez-Aguilar, H.
Powiązania:: https://bibliotekanauki.pl/articles/178120.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: integral equations
Helmholtz equation
acoustic scattering
Opis:: We propose a numerical surface integral method to study complex acoustic systems, for interior and exterior problems. The method is based on a parametric representation in terms of the arc’s lengths in curvilinear orthogonal coordinates. With this method, any geometry that involves quadric or higher order surfaces, irregular objects or even randomly rough surfaces can be considered. In order to validate the method, the modes in cubic, spherical and cylindrical cavities are calculated and compared to analytical results, which produced very good agreement. In addition, as examples, we calculated the scattering in the far field and the near field by an acoustic sphere and a cylindrical structure with a rough cross-section.
Źródło:: Archives of Acoustics; 2016, 41, 3; 461-472
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 36.

Tytuł:: Radon measurements in groundwater mines in La Palma and El Hierro, Canary Islands (Spain)
Autorzy:: Santamarta, Juan C.
Gutiérrez, Luis Enrique Hernández
Martín, Jesica Rodríguez
Pérez, Lina
Bascones, Rafael J. Lario
Moro, Ángel Morales González
Pérez, Noelia Cruz
Powiązania:: https://bibliotekanauki.pl/articles/1853859.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: promieniowanie
wody podziemne
kopalnia
Wyspy Kanaryjskie
radon gas
radiation
groundwater
mines
Canary Islands
Opis:: In the Canary Islands, groundwater is the main source of drinking water. Groundwater mines have been the system used by the engineers of the archipelago to collect water from the ground. The Canary Islands are volcanic with soils characterized by being rich in uranium, the disintegration of which gives rise to radon gas. In this study, radon gas levels in the mines on two islands of the archipelago have been measured to study exposure to this gas in the galleries. Results show values much higher than the European regulatory limit concentrations.
Źródło:: Archives of Mining Sciences; 2020, 65, 4; 869-876
0860-7001
Pojawia się w:: Archives of Mining Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 37.

Tytuł:: Directional Ordering in Amorphous $Fe_{43}Ni_{43}Zr_7Cu_1B_6$ Ferromagnetic Alloys
Autorzy:: Varga, M.
Varga, R.
Vojtaník, P.
Hernando, B.
Prida, V.
Santos, J.
Pérez, M.
Powiązania:: https://bibliotekanauki.pl/articles/1533987.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Kj
75.60.Nt
Opis:: Development of the atomic directional ordering in the $Fe_{43}Ni_{43}Zr_7Cu_1B_6$ alloy, during its conventional the same as after transverse magnetic field annealing, was experimentally studied by the amplitude dependence of susceptibility and hysteresis loops measurements, respectively. Diffusion processes of the mobile atoms caused perminvar effect, decrease of the initial susceptibility, increase of the critical field, and linear shape of the hysteresis loop. Uniaxial magnetic anisotropy, created during magnetic field annealing of the FeNiZrCuB alloy, was confirmed also by observation of the surface domain structure.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 804-806
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 38.

Tytuł:: The essential oil of the protected species: Thymus praecox ssp. penyalarensis
Autorzy:: Salas, J.B.
Tellez, T.R.
Pardo, F.M.V.
Perez-Alonso, M.J.
Capdevila, M.A.C.
Powiązania:: https://bibliotekanauki.pl/articles/57194.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: essential oil
protected species
Thymus praecox ssp.penyalarensis
endemism
threatened species
chemical composition
Lamiaceae
plant species
Opis:: The essential oil of a protected Spanish species, Thymus praecox ssp. penyalarensis, was firstly analyzed [Gas Chromatography-Mass Spectrometry (GC-MS)] from wild populations during the phenological stages of flowering and fruiting. In flowering, the yield was 1.2%, and the major components were identified as thymol (18.5%), p-cymene (14.6%), carvacrol (11.6%), and γ-terpinene (10.1%). In fruiting, the yield was 0.9% and the major components resulted to be p-cymene (19.0%), carvacrol (16.5%), and borneol (10.5%). An experimental cultivation of the taxa was made also in order to analyze its essential oil as well. The yield was 1.3%, and the main compounds were thymol (19.1%), p-cymene (17.0%), and γ-terpinene (12.3%). Finally, the composition of the essential oil of this plant is discussed in relation to chemotaxonomic and biogeographical aspects.
Źródło:: Acta Societatis Botanicorum Poloniae; 2012, 81, 1
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 39.

Tytuł:: Hexagonal Photonic Crystal Fiber Behaviour as a Chromatic Dispersion Compensator of a 40 Gbps Link
Autorzy:: Betancur-Pérez, A. F.
Botero-Cadavid, J. F.
Reyes-Vera, E.
Gómez-Cardona, N.
Powiązania:: https://bibliotekanauki.pl/articles/226794.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: BER
chromatic dispersion
DWDM
photonic crystal fibers
vector finite element method
Opis:: In this paper, the capabilities of chromatic dispersion compensation of a photonic crystal fiber with a hexagonal distribution of circular air holes was investigated. The vector finite element method with scattering boundary condition was used to analyze a set of configurations of the fiber in which the distance between air holes’ centers was modified. With this method it was possible to obtain the values of chromatic dispersion and confinement factor in the C fiber band. The best suited configurations were tested in a 160 km optical link with a bit rate of 40 Gbps. The performance was evaluated by measuring the bit error rate for a set of 20 channels with channel spacing of 100 GHz. T e simulation results showed that is possible to reach values of hromatic dispersion as low as −850 ps/nm⋅km, confinement losses close to 10⁻³ dB/km and good BER results in the order of 10⁻¹⁷ for a wavelength of 1550 nm.
Źródło:: International Journal of Electronics and Telecommunications; 2017, 63, 1; 93-98
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 40.

Tytuł:: Importance of the ore veins to study, to interpret and to protect the mining heritage
Znaczenie żył rudnych dla studiowania, interpretacji i ochrony dziedzictwa górniczego
Autorzy:: Dueñas Molina, J.
Lorenc, M. W.
Molina Vega, A.
Molina Molina, F.
Liébanas, J. S.
Pérez Sánchez, A. A.
Powiązania:: https://bibliotekanauki.pl/articles/122205.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:: mining heritage
legal protection
cultural landscape
working methodology
dziedzictwo górnicze
ochrona prawna
krajobraz kulturowy
metodologia pracy
Opis:: Four thousand years of mining activity shaped a singular cultural landscape in the Linares-La Carolina district. The geological richness of the area attracted the main civilizations from different eras. Argarians, Romans, Carthaginians, as well as mining companies from Great Britain, Germany, France and Belgium during the industrial period, established their installations working the rich veins of copper and galena. In 2002 the Cultural authorities of the Andalusia Board entrusted the Colectivo Proyecto Arrayanes with a research to identify the most significant remains. The result of our work was the documentation for the inscription of 65 mining and metallurgy sites in the Andalusia Historic Heritage List. Later, we extended the work to a second record including 60 more sites, belonging to all municipalities of the mining district. Currently, our association is developing a project to obtain the certification of the ancien mining district as Heritage Area, a new legal body of the Historical Heritage Law published in Andalucía in 2007. This could provide better protection for the main part of the mining sites and remains in the district, including the archaeological sites. The declaration will allow the management of the territory to became a Cultural Park. Our research establish 16 sectors, extended over eight municipalities. Each sector is related to one or several veins, and includes mining sites, archaeological sites and remains related to metallurgy, ore dressing or railway installations. And each site is described in a registry card. We have catalogued more than 580 sites. Around 150 of them have evidences of the presence of Cornish technology. The Cultural Landscape as axle of future developments and the veins are the real order of the mining territory. Industrial and mining remains, roads, railway lines, etc, are placed in relation with the orientation of the veins. These are the main guidelines of the Working Methodology we are developing to complete this ambitious project.
Cztery tysiące lat działalności górniczej ukształtowało na obszarze Linares-La Carolina swoisty krajobraz kulturowy. Geologiczne bogactwo tego obszaru interesowało główne cywilizacje wszystkich epok. Argarianie, Rzymianie, Kartagińczycy, podobnie jak później wielkie kompanie górnicze z Wielkiej Brytanii, Niemiec, Francji i Belgii w okresie przemysłowym, wszyscy wznosili swoje zakłady pracujące funkcjonujące na bogatych żyłach miedzi i ołowiu. W 2002 r. władze ds. kultury Zarządu Andaluzji powierzyły stowarzyszeniu Colectivo Proyecto Arrayanes wykonanie inwentaryzacji najważniejszych pozostałości górniczych. Rezultatem wykonanej pracy była dokumentacja obejmująca 65 stanowisk górniczych i hutniczych z Listy Andaluzyjskiego Dziedzictwa Historycznego. Później badania poszerzono o drugi zapis kolejnych 60 stanowisk, należących do wszystkich gmin tego górniczego obszaru. Obecnie Stowarzyszenie opracowuje projekt mający na celu deklarację tego dawnego rejonu górniczego jako Obszar Dziedzictwa, nową postać prawną Dziedzictwa Historycznego stworzoną w Andaluzji w 2007 r. Mogłoby to zapewnić lepszy poziom ochrony głównej części terenów górniczych, ale też pozostałego obszaru, w tym stanowisk archeologicznych. Deklaracja taka umożliwiłaby zarządzanie tym terytorium jako Parkiem Kultury. Przedstawiona propozycja ustanawia 16 obszarów, poszerzonych o osiem gmin. Każdy obszar związany jest z jedną lub kilkoma żyłami rudnymi i obejmuje stanowiska górnicze, archeologiczne oraz pozostałości związane z metalurgią, przeróbką rudy i obiekty kolejowe. Każde stanowisko opisane jest w formie oddzielnej karty kartoteki rejestru. Stworzony katalog obejmuje ponad 560 stanowisk, z których około 150 posiada dowody wykorzystywania technologii kornwalijskiej. Krajobraz kulturowy oraz rudne żyły stanowią oś przyszłego rozwoju terytorium górniczego. Pozostałości przemysłowe i górnicze, drogi, linie kolejowe itp., są umieszczone w stosunku do orientacji żyły. Właśnie one są głównymi wytycznymi do stworzenia roboczej metodologii, opracowywanej w celu ukończenia tego ambitnego projektu.
Źródło:: Hereditas Minariorum; 2018, 5; 33-50
2391-9450
2450-4114
Pojawia się w:: Hereditas Minariorum
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 41.

Tytuł:: Repeatability and reproducibility of dry and wet heat resistance tests according to EN 12721 and EN 12722
Powtarzalność i odtwarzalność badań odporności na ciepło suche i mokre według norm EN 12721 and EN 12722
Autorzy:: Perez, R.M.
Roux, M.-L.
Milla, J.L.
Garcia, S.
Delorme, T.
Lacourt, S.
Powiązania:: https://bibliotekanauki.pl/articles/52760.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: repeatability
reproducibility
dry heat resistance test
wet heat resistance test
EN 12721 standard
EN 12722 standard
European standard
surface resistance
furniture
furniture surface
Opis:: The European Standards 12721 and 12722 specify a method for the assessment of the surface resistance to wet and dry heat of furniture respectively. The aim of the research is to establish data on the test precision of both tests in order that this precision is mentioned on the standards and test reports based on them. It is intended to measure the reproducibility and repeatability according to the standard ISO 5725-2 of data obtained in an international round-robin exercise carried out by eight participating laboratories expert in furniture surfaces. The results presented show that the repeatability variance is almost 0, while the between-laboratory variance is between 0 and 1, according to the order of increment of the assessment rating code.
Normy europejskie 12721 i 12722 określają metodę oceny odporności powierzchni meblowych na mokre i suche ciepło. Celem badań jest ustalenie danych dotyczących precyzji oby rodzajów badań w celu umieszczenia tych informacji w normach i sprawozdaniach z badań opartych na tych normach. Zamierza się dokonać pomiarów powtarzalności i odtwarzalności wyników międzynarodowego badania round-robin przeprowadzonego przez osiem laboratoriów, które specjalizują się w badaniu powierzchni, zgodnie z normą ISO 5725-2. Zaprezentowane wyniki wskazują, że wariancja powtarzalności jest bliska 0, natomiast wariancja pomiędzy laboratoriami mieści się w przedziale 0 i 1, zgodnie z porządkiem wzrostu kodów oceny.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2012, 55, 187
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 42.

Tytuł:: Dual regulation of cytosolic ascorbate peroxide (APX) by tyrosine nitration and S-nitrosylation
Autorzy:: Begara-Morales, J.
Sanchez-Calvo, B.
Chaki, M.
Valderrama, R.
Mata-Perez, C.
Lopez-Jaramillo, J.
Carreras, A.
Padilla, M.
Corpas, F.
Barroso, J.
Powiązania:: https://bibliotekanauki.pl/articles/80378.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: conference
post-translational modification
nitric oxide
target protein
ascorbate peroxidase
tyrosine nitration
S-nitrosylation
salinity stress
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 43.

Tytuł:: Theoretical Investigation of Large-Signal Noise in Nanometric Schottky-Barrier Diodes Operating in External Resonant Circuits
Autorzy:: Shiktorov, P.
Starikov, E.
Gružinskis, V.
Varani, L.
Vaissière, J.
Reggiani, L.
Pérez, S.
González, T.
Powiązania:: https://bibliotekanauki.pl/articles/1178800.pdf
Data publikacji:: 2005-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.20.Ht
72.30.+q
72.70.+m
Opis:: We report Monte Carlo simulations of electronic noise in heavily doped nanometric GaAs Schottky-barrier diodes operating in series with a parallel resonant circuit when a high-frequency large-signal voltage is applied to the whole system. Significant modifications of the noise spectrum with respect to the unloaded diode are found to occur in the THz-region.
Źródło:: Acta Physica Polonica A; 2005, 107, 2; 396-399
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 44.

Tytuł:: The Oxfordian ammonite genus Passendorferia Brochwicz Lewiński and the Tethyan subfamily Passendorferiinae Meléndez: origin and palaeobiogeography
Autorzy:: Mendez, G.
Atrops, F.
Bello, J.
Brochwicz-Lewiński, W.
Darpa, C.
Fozy, I.
Perez-Urresti, I.
Ramajo, J.
Sequeiros, L.
Powiązania:: https://bibliotekanauki.pl/articles/2061354.pdf
Data publikacji:: 2009
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Upper Jurassic
ammonites
paleobiogeography
West Tethys
biostratigraphy
evolution
Mediterranean Province
Opis:: The Oxfordian ammonite group Passendorferiinae (known as "Mediterranean perisphinctids") forms a group of perisphinctids characterized by strongly evolute serpenticone coiling and subcircular to subquadrate whorl section, and forms a lateral divergent branch of the main stem Perisphinctidae. They originated probably from Late Callovian Grossouvriinae (Alligaticeras) and spread mainly in the Mediterranean (Tethyan) Province along the southern margin of Tethys, occasionally reaching the outer areas of epicontinental platforms. Their particular morphological features make them somewhat homoeomorphic with Tethyan Kimmeridgian Nebrodites. The phyletic link might be represented by the genus Geyssantia Meléndez, known from the Late Oxfordian Planula Chronozone. Separate biogeographic distribution in relation to the Perisphinctinae might reflect a progressive differentiation of western Tethyan faunas at the Callovian-Oxfordian boundary and at the onset of the Middle Oxfordian Transversarium Chronozone. Their rapid evolution gives them a biostratigraphic value similar to that of the Perisphinctinae. At the turn of the Middle-Late Oxfordian they gave rise to early Ataxioceratinae (Orthosphinctes), which replaced the Perisphinctinae in epicontinental areas, and colonised the marginal epicontinental blocks of northern Tethys. The taxonomy of this group is based upon the recognition of sexual dimorphism, using a single generic and specific name for both (M) and (m), and hence rejecting the use of former subgeneric ames for both dimorphs. A new species within this line: Passendorferia nodicostata sp. nov. from the Plicatilis Biozone (Paturattensis Subbiozone) is defined and described for the first time.
Źródło:: Volumina Jurassica; 2009, 7, 1; 113-134
1896-7876
1731-3708
Pojawia się w:: Volumina Jurassica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:: Polyphenolic composition of Spanish cultivars of globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori)
Autorzy:: Pérez-Esteve, É.
Sałata, A.
Barat, J.M.
Stępniowska, A.
López-Galarza, S.
Nurzyńska-Wierdak, R.
Powiązania:: https://bibliotekanauki.pl/articles/11897335.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:: plant cultivation
cardoon
Cynara cardunculus
polyphenolic composition
Opal cultivar
Concerto cultivar
Symphony cultivar
Madrigal cultivar
Blanca de Tudela cultivar
A-106 cultivar
herbal plant
medicinal plant
phenolics content
chlorogenic acid
apigenin
cynarin
Opis:: Globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori) is an edible herbaceous perennial plant that plays an important economic role in Mediterranean agriculture. In recent years, extensive research, which aimed to characterize the phenolic profile of the most important globe artichoke cultivars in Italy, has been conducted. However, very little information is available on the phenolic composition of cultivars traditionally grown in Spain. In this work, six cultivars (‘Opal’, ‘Symphony’, ‘Concerto’, ‘Madrigal’, ‘Blanca de Tudela’ and ‘A-106’) cultured in Spain were characterized according to their phenolic content. The phenolic profile differed between cultivars, and also between flower parts. The major phenolic compound in all the different cultivars was chlorogenic acid. Of the six studied cultivars, ‘Madrigal’ had the highest phenolic content.
Źródło:: Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 2; 177-184
1644-0692
Pojawia się w:: Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:: Nutrient uptake efficiency of five pistachio (Pistacia vera L.) varieties
Autorzy:: Aznarte-Mellado, C.
Sola-Campoy, P.J.
Robles, F.
Villasenor, J.G.
Rejon, C.R.
de la Herran, R.
Navajas-Perez, R.
Powiązania:: https://bibliotekanauki.pl/articles/1189813.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: nutrient uptake
pistachio nut
Pistacia vera
nutrient content
edible fruit
Opis:: Pistacia vera L., whose edible fruit is the pistachio, is an economically important crop. It is cultivated worldwide and over 50 different varieties have been described attending to morphological and phenological characteristics. The selection of a suitable cultivar may affect the profitability of the orchards, and thus requires careful consideration for any given region. The type and concentration of nutrients taken up by the plant affect its development and eventually the quality and quantity of the fruits. It is a matter of discussion whether all varieties have the same capacity to absorb nutrients. In order to clarify this aspect, in this study the efficiency of nutrient uptake has been assessed for five pistachio varieties: three males (M38, G1, and Mateur), and two females (Batoury, and Joley), by measuring the concentration of 30 chemical elements in leaves by Inductively Coupled Plasma (ICP) and C/N micro-elemental analyses. Data were subjected to a non-parametric Friedman test, using a series of Wilcoxon Rank Sum test with a Bonferroni correction as post hocs. Our findings demonstrate that all these varieties have an equal uptake capacity for Al, Cr, Cu, K, Li, Mn, Ni, Pb, S, Sr, Ti, Tl, Zn, N, B, Fe, Mg, Na, and V. No differences related to the gender of the plants were detected. Only Mateur exhibited significantly higher levels of Ca and lower levels of C. Stock plants from an experimental plot were used as material. These plants are not used for productive purposes, and flowering and fruiting are partially restricted by removing potential nutrient-demanding structures. These findings support the contention that the presence/absence of such organs has more influence on the nutrient uptake than does the variety itself.
Źródło:: Journal of Elementology; 2016, 21, 1; 141-148
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:: Feeding habits and habitat of herbivorous mammals from the Early–Late Hemphillian (Miocene) of Costa Rica
Autorzy:: Perez-Crespo, V.A.
Laurito, C.A.
Arroyo-Cabrales, J.
Valerio, A.L.
Morales-Puente, P.
Cienfuegos-Alvarado, E.
Otero, F.J.
Powiązania:: https://bibliotekanauki.pl/articles/21193.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:: Carbon and oxygen stable isotope values in the dental enamel of fossils were used to infer the diet and habitat of the extinct equids Calippus hondurensis, Dinohippus mexicanus, and Protohippus gidleyi, the gomphothere Gomphotherium hondurensis, and the llama Hemiauchenia vera of the Early–Late Hemphillian (Hh2) from San Gerardo de Limoncito, Puntarenas province, Costa Rica. The results suggest that these mammals fed mainly on C₃ plants and lived in clearings of rainforests. This contrasts with previous studies from North America that indicated that the same species lived in forest savannas and fed mainly on C₄ plants, but it is similar to the results obtained from the palynological record of the area, as well as with several vegetation models suggesting the presence of humid tropical forest during the Miocene in Central America.
Źródło:: Acta Palaeontologica Polonica; 2018, 63, 4
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:: Vascular structure of the earliest shark teeth
Autorzy:: Martínez-Pérez, C.
Martín-Lazaro, A.
Ferrón, H. G.
Kirstein, M.
Donoghue, P. C. J.
Botella, H.
Powiązania:: https://bibliotekanauki.pl/articles/139170.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Leonodus
Celtiberina
early chondrichthyans
Lower Devonian
synchrotron tomography
vascular system
ryby chrzęstnoszkieletowe
ryby chrzęstne
chrzęstniki
dolny dewon
tomografia
układ naczyniowy
Opis:: Here we use synchrotron tomography to characterise dental vasculature in the oldest known tooth-bearing sharks, Leonodus carlsi Mader, 1986 and Celtiberina maderi Wang, 1993. Three dimensional reconstruction of the vascular system and microstructure of both taxa revealed a complex and dense network of canals, including horizontal, ascending and secondary bifurcated canals, as well as histological features consistent with an osteodont histotype. However, L. carlsi and C. maderi also exhibit significant morphological differences, showing Leonodus a typical diplodont tooth morphology with a linguo-labially elongated base, that contrast with Celtiberina’s teeth that show a single conical cusp curved lingually with a week developed flat base mesio-distally extended, perhaps reflecting distant relationship. These data are compatible with a pre-Devonian diversification of the two main tooth types traditionally recognised in Palaeozoic sharks (i.e., “cladodont” vs “diplodont”). Finally, our data demonstrate that existing dental classification schemes based on styles of vascularisation are over-simplified, especially when Palaeozoic taxa are considered.
Źródło:: Acta Geologica Polonica; 2018, 68, 3; 457-465
0001-5709
Pojawia się w:: Acta Geologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:: Transcriptomic profiling of linolenic acid-responsive genes in ROS signalling from RNA-seq data in Arabidopsis
Autorzy:: Mata-Perez, C.
Sanchez-Calvo, B.
Begara-Morales, J.
Padilla, M.
Valderrama, R.
Luque, F.
Fernandez-Ocana, A.
Corpas, F.
Barroso, J.
Powiązania:: https://bibliotekanauki.pl/articles/80890.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: conference
linoleic acid
polyunsaturated fatty acid
jasmonic acid
phytohormone
reactive oxygen species
hydrogen peroxide
gene expression
Arabidopsis thaliana
lipoxygenase
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Nutrient uptake efficiency of five pistachio (Pistacia vera L.) varieties
Autorzy:: Aznarte-Mellado, C.
Sola-Campoy, P.J.
Robles, F.
Villasenor, J.G.
Rejon, C.R.
de la Herran, R.
Navajas-Perez, R.
Powiązania:: https://bibliotekanauki.pl/articles/14870.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: nutrient uptake
pistachio nut
Pistacia vera
nutrient content
edible fruit
Opis:: Pistacia vera L., whose edible fruit is the pistachio, is an economically important crop. It is cultivated worldwide and over 50 different varieties have been described attending to morphological and phenological characteristics. The selection of a suitable cultivar may affect the profitability of the orchards, and thus requires careful consideration for any given region. The type and concentration of nutrients taken up by the plant affect its development and eventually the quality and quantity of the fruits. It is a matter of discussion whether all varieties have the same capacity to absorb nutrients. In order to clarify this aspect, in this study the efficiency of nutrient uptake has been assessed for five pistachio varieties: three males (M38, G1, and Mateur), and two females (Batoury, and Joley), by measuring the concentration of 30 chemical elements in leaves by Inductively Coupled Plasma (ICP) and C/N micro-elemental analyses. Data were subjected to a non-parametric Friedman test, using a series of Wilcoxon Rank Sum test with a Bonferroni correction as post hocs. Our findings demonstrate that all these varieties have an equal uptake capacity for Al, Cr, Cu, K, Li, Mn, Ni, Pb, S, Sr, Ti, Tl, Zn, N, B, Fe, Mg, Na, and V. No differences related to the gender of the plants were detected. Only Mateur exhibited significantly higher levels of Ca and lower levels of C. Stock plants from an experimental plot were used as material. These plants are not used for productive purposes, and flowering and fruiting are partially restricted by removing potential nutrient-demanding structures. These findings support the contention that the presence/absence of such organs has more influence on the nutrient uptake than does the variety itself.
Źródło:: Journal of Elementology; 2016, 21, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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