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    Wyświetlanie 1-53 z 53
    Tytuł:
    Can payments for ecosystem services contribute to sustainable development in the Brazilian Amazon?
    Autorzy:
    Seehusen, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/38733.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    forest ecosystem service
    sustainable development
    Brazil
    Amazon River
    ecological economics
    Opis:
    The Brazilian Amazon supplies the world with several forests ecosystem services, many of which are essential to sustain human life on earth. Nevertheless, the Amazon is threatened by deforestation and degradation implying in reductions on the provision of these. According to economic theory, as ecosystem services are positive externalities and public goods, agents do not take into consideration the costs and benefits of their consumption and production of ecosystem services into their economic decisions. To address this problem payment for ecosystem services – PES – emerged, aiming to provide a source of income to the poor people living in forest areas, stimulating them not to deforest, and making agents who are indebted with the nature pay for their overconsumption of ecosystem services. There is still controversy about possible impacts of the instrument. This article accesses the potentials of PES to contribute to sustainable development in the Brazilian Amazon using the three goals related to sustainable development proposed by the ecological economics theory: efficient allocation, fair distribution, and sustainable scale. The study shows that PES as a pure market approach is unlikely to solve neither the scale nor the distribution problems. Therefore, for PES to achieve sustainable development, markets for ecosystem services should first be constrained by a maximum sustainable scale. Then, measures should ensure fair distribution in second place. Only after these questions have been tackled, it is desirable that agents interact in the ecosystem services markets to lead to an efficient allocation of resources.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2009, 51, 1
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minutes of meetings, International Commission on Trichinellosis
    Sprawozdania z posiedzeń, Międzynarodowa komisja Włośnicowa
    Otchety zasedanijj Mezhdunarodnojj Komissii po Trikhinellezu
    Autorzy:
    Gould, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/841068.pdf
    Data publikacji:
    1962
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Annals of Parasitology; 1962, 08, 1
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The market-oriented production system as a part of agricultural innovation
    System produkcji zorientowanej na rynek jako element innowacji w rolnictwie
    Autorzy:
    Kesmarki-Gally, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/869499.pdf
    Data publikacji:
    2014
    Wydawca:
    The Polish Association of Agricultural and Agribusiness Economists
    Tematy:
    market-oriented production system
    agricultural innovation
    agriculture
    innovation
    farmer
    information
    marketplace
    Opis:
    The paper aims to analyse the innovation process in the economy with the focus on agriculture and food production in Hungary. There was presented a model of production with the market-focused technology development system. The authors argue that the objectives of the system are as follows: inducing competition between input suppliers, increasing supply, loosening rigid trading structures, fostering the optimisation of mechanisation and ensuring the possibility of appropriate technology development. Harmonizing the subsidizing systems, optimizing their different incentive factors will become more precise and professionally more established and all these can contribute to optimizing the growth of innovations. In my work, I would like to develop the concept of a market place that is a marketplace and an innovation space at the same time, which can improve the conditions for the purchase of European agriculture, given the chance to expand production by improving profitability.
    Celem artykułu była analiza procesu innowacji w gospodarce z naciskiem na rolnictwo i produkcję żywności na Węgrzech. Zaprezentowano model produkcji z systemem technologii zorientowanych na rozwój rynku. Zdaniem autora system ten ma na celu m.in.: wywołanie konkurencji między dostawcami surowców, zwiększenie podaży, rozluźnienie sztywnych struktur handlowych, wspieranie optymalizacji mechanizacji oraz zapewnienie możliwości odpowiedniego rozwoju technologii. Harmonizacja mechanizmów wsparcia, optymalizując ich różne czynniki motywacyjne, powinna stać się bardziej precyzyjna, co w efekcie stworzy bardziej profesjonalnie warunki do rozwoju innowacji.
    Źródło:
    Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2014, 16, 6
    1508-3535
    2450-7296
    Pojawia się w:
    Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of costs of agricultural machine operation and its impact on organic farms in Hungary
    Rozwój kosztów maszyn rolnych i jego wpływ na organiczne gospodarstwa rolne na Węgrzech
    Autorzy:
    Kesmarki-Gally, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/869654.pdf
    Data publikacji:
    2016
    Wydawca:
    The Polish Association of Agricultural and Agribusiness Economists
    Tematy:
    cost
    agricultural machine
    organic farm
    machine
    Hungary
    Opis:
    One of the most important tasks of the National Agricultural Research and Innovation Centre Institute of Agricultural Engineering (NARIC MGI) is to annually provide information on the evolution of agricultural machine operation costs in Hungary. Therefore, the Institute – in addition to other activities – monitors and updates changes concerning agricultural machinery through the use of operational data and values of basic farms on a yearly basis. The work results in the development and publication of a booklet which best summarizes the actual cost of agricultural work performed by different machines. It contains the average performance and cost of agricultural machines and equipment calculated by expected prices, wages, and other costs. In this article, our aim is to present the main results of the observation and summarize the main conclusions of traditional and organic farms in Hungary.
    Jednym z najważniejszych zadań Centrum Badań Narodowej Gospodarki Rolnej Instytutu Inżynierii Rolnej (NARIC MGI) jest coroczne dostarczenie informacji na temat kosztów pracy maszyn przeznaczonych do pracy w węgierskim rolnictwie. Instytut monitoruje i uaktualnia co roku te zmiany za pomocą danych uzyskanych z gospodarstw. Następnie publikuje broszurę podsumowującą rzeczywiste koszty pracy wykonywanej przez różne maszyny rolnicze. Na podstawie oczekiwanych cen, płac oraz innych kosztów oszacowuje się także średnią wydajność maszyn i ich wyposażenia.
    Źródło:
    Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2016, 18, 3
    1508-3535
    2450-7296
    Pojawia się w:
    Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reflux esophagitis and Helicobacter pylori: Is there an association in children?
    Autorzy:
    Zagorski, SE.
    Nazarenko, ON.
    Powiązania:
    https://bibliotekanauki.pl/articles/1914060.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    reflux esophagitis
    helicobacter pylori infection
    children
    Opis:
    Purpose: The role of Helicobacter pylori (Hp) in the development of gastroesophageal reflux disease (GERD) remains disputable. This study was planned to determine clinical-epidemic correlations between reflux esophagitis (RE) and Hp in older children. Materials and methods: 308 children with RE and 418 patients with chronic gastritis (CG) without RE between the ages of 12 and 18 were examined. Hp was diagnosed by histological (Giemsa and hematoxylin-eosin stain, with evaluation of dissemination grade) and rapid urease test. Subjective symptoms (heartburn, abdominal pain, other dyspeptic complaints) were analyzed by questionnaire. Results: Hp infection was found in 44.5% of children with RE (no difference in patients without RE), and it does not increase the erosive esophageal defects risk. Clinical symptoms are not connected to this infection in examined patients. The frequency of Hp infection decreases with the disease duration increase. Conclusion: The development of RE is not connected with Hp, but the disease course has certain peculiarities in the conditions of Hp infection.
    Źródło:
    Progress in Health Sciences; 2014, 4, 1; 41-46
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new short-bodied salamander from the Upper Jurassic-Lower Cretaceous of China
    Autorzy:
    Wang, Y
    Evans, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/20232.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Lower Cretaceous
    Cretaceous
    China
    Upper Jurassic
    Pangerpeton sinensis
    deposit
    Jurassic
    salamander
    paleontology
    Opis:
    Abundant well−preserved salamander fossils have recently been recovered from localities across northeastern China. Pangerpeton sinensis gen. et sp. nov. is represented by a nearly complete skeletal impression of a postmetamorphosed salamander from the Late Jurassic/Early Cretaceous locality of Wubaiding, Liaoning Province. It is characterised by a short wide skull and only 14 presacral vertebrae. Associated soft tissue impressions suggest a warty skin and a broad body outline. Phylogenetic analysis indicates a basal position within Caudata, either just within or just outside crown−group Urodela.
    Źródło:
    Acta Palaeontologica Polonica; 2006, 51, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sintering Behavior and Mechanical Property of Cu-Sn Alloy with Ag Addition Produced by Pulsed Electric Current Sintering
    Autorzy:
    Lee, Se Hwan
    Ahn, Byungmin
    Powiązania:
    https://bibliotekanauki.pl/articles/2174574.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    powder metallurgy
    Cu-Sn alloy
    pulsed electric current sintering
    grinding tool
    Opis:
    This work mainly focuses on the sintering behavior of the Cu-Sn alloy with the addition of Ag up to 4 wt% after pulsed electric current sintering (PECS) process for ultra-fast sintering. The microstructural evolution was characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and density measurements. The mechanical properties were evaluated via measurements of transverse rupture strength (TRS) and Rockwell hardness. The mechanism during the sintering process has been discussed thoroughly, and the effect on porosity with the addition of the Ag is also correlated. The results showed that the growth of porosity progressed with the amount of Ag up to 2 wt%, and further addition of Ag leads reduction in porosity. The effect on mechanical properties were improved slowly as the amount of Ag increased.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1475--1479
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The scapulocoracoid of an Early Triassic stem-frog from Poland
    Autorzy:
    Borsuk-Bialynicka, M
    Evans, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/20856.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    scapulocoracoid
    Triassic
    Polska
    pectoral girdle
    Anura
    Triadobatrachus
    stem-frog
    Salientia
    Early Triassic
    paleontology
    Czatkowice
    Opis:
    The scapulocoracoid of Czatkobatrachus polonicus Evans and Borsuk−Białynicka, 1998, a stem−frog from the Early Triassic karst locality of Czatkowice (Southern Poland), is described. The overall type of scapulocoracoid is plesiomorphic, but the subcircular shape and laterally oriented glenoid is considered synapomorphic of Salientia. The supraglenoid foramen is considered homologous to the scapular cleft of the Anura. In Czatkobatrachus, the supraglenoid foramen occupies an intermediate position between that of the early tetrapod foramen and the scapular cleft of Anura. The cleft scapula is probably synapomorphic for the Anura. In early salientian phylogeny, the shift in position of the supraglenoid foramen may have been associated with an anterior rotation of the forelimb. This change in position of the forelimb may reflect an evolutionary shift from a mainly locomotory function to static functions (support, balance, eventually shock−absorption). Laterally extended limbs may have been more effective than posterolateral ones in absorbing landing stresses, until the specialised shock−absorption pectoral mechanism of crown−group Anura had developed. The glenoid shape and position, and the slender scapular blade, of Czatkobatrachus, in combination with the well−ossified joint surfaces on the humerus and ulna, all support a primarily terrestrial rather than aquatic mode of life. The new Polish material also permits clarification of the pectoral anatomy of the contemporaneous Madagascan genus Triadobatrachus.
    Źródło:
    Acta Palaeontologica Polonica; 2002, 47, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A two-step fall detection algorithm combining threshold-based method and convolutional neural network
    Autorzy:
    Xu, Tao
    Se, Haifeng
    Liu, Jiahui
    Powiązania:
    https://bibliotekanauki.pl/articles/1848958.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wearable
    fall detection
    MPU6050
    threshold-based method
    convolutional neural network
    Opis:
    Falls are one of the leading causes of disability and premature death among the elderly. Technical solutions designed to automatically detect a fall event may mitigate fall-related health consequences by immediate medical assistance. This paper presents a wearable device called TTXFD based on MPU6050 which can collect triaxial acceleration signals. We have also designed a two-step fall detection algorithm that fuses threshold-based method (TBM) and machine learning (ML). The TTXFD exploits the TBM stage with low computational complexity to pick out and transmit suspected fall data (triaxial acceleration data). The ML stage of the two-step algorithm is implemented on a server which encodes the data into an image and exploits a fall detection algorithm based on convolutional neural network to identify a fall on the basis of the image. The experimental results show that the proposed algorithm achieves high sensitivity (97.83%), specificity (96.64%) and accuracy (97.02%) on the open dataset. In conclusion, this paper proposes a reliable solution for fall detection, which combines the advantages of threshold-based method and machine learning technology to reduce power consumption and improve classification ability.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 1; 23-40
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Iceberg Melting and Climate Change in NW Atlantic Waters
    Autorzy:
    Perez-Gruszkiewicz, S.E.
    Peterson, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/117122.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Arctic shipping
    climate change
    Iceberg
    Atlantic Ocean
    NW Atlantic
    iceberg melting
    Labrador
    International Ice Patrol (IIP)
    Opis:
    Climate change is predicted to cause increases in sea surface temperature (SST), as well as decreases in sea-ice cover, wind and current velocities. These changes will have a marked effect on iceberg melting in the shipping lanes off Newfoundland and Labrador, Canada. Icebergs that today can cross from northern Labrador to Newfoundland without melting will in the future have to be much larger to survive the transit. For example, icebergs at N Labrador in December of 2016 that are smaller than 156 m will melt before reaching 48N, but in year 2100 the length increases to 228 m. In addition, if future iceberg size distributions off Labrador are the same as today, icebergs will experience roughly 50% reductions in numbers in the NW Atlantic shipping lanes by year 2100. The increased melting rates are due to, in order of importance, increased sea-surface temperatures (responsible for 66% of the increase in the minimum transit size), decreasing current velocities (31%), and decreasing sea-ice cover (3%). Decreasing sea-ice tends to increase wave heights as well as accelerate the effects of wave erosion; however, for the areas studied the wave height is predicted to decrease moderately in year 2100, by a maximum of about 10% in December.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 459-467
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A basal archosauriform from the Early Triassic of Poland
    Autorzy:
    Borsuk-Bialynicka, M
    Evans, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/22940.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Osmolskina czatkowiensis
    Polska
    bone
    Middle Triassic
    Early Triassic
    Czatkowice
    basal archosauriform
    geographic distribution
    Early Olenekian
    Archosauriformes
    deposit
    distribution
    paleontology
    Opis:
    Basal Archosauriformes had a wide geographic distribution through the Lower to Middle Triassic. Osmolskina czatkowiensis gen. et sp. nov. from Early Olenekian karst deposits at Czatkowice, west of Cracow, provides the first record from Poland. The reconstructed skull and attributed postcranial elements show a morphology closely resembling that of the Early Anisian African genus Euparkeria Broom, 1913, while differing at generic level. Both genera display the same mosaic of plesiomorphic and apomorphic character states, but share no unique apomorphic character state. They might thus be combined in the family Euparkeriidae Huene, 1920, but could also constitute two plesions of the same grade lying just below the Archosauria + Proterochampsidae node. Currently, Euparkeriidae remains monotypic because no other genus can be assigned to it with confidence. Until this problem is resolved, the term “euparkeriid” essentially denotes a grade of Lower to Middle Triassic non−archosaurian archosauriforms that are more derived than proterosuchid grade taxa, but lack the specializations of either erythrosuchids or proterochampsids. They were probably Pangaean in their distribution.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of nutrient uptake by strawberry (Fragaria x ananassa Duch.) varieties according to phenological stages
    Autorzy:
    Bayram, S.E.
    Elmacı, Ö.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/13079809.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2021, 20, 1; 49-59
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Feasibility of humidol application for improving fertility of sandy soils in the Legnica-Glogow Copper District [LGOM]
    Autorzy:
    Licznar, M
    Drozd, J.
    Licznar, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401883.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    mineral-organic fertilization
    physicochemical property
    chemical property
    soil fertility
    soil
    sandy soil
    Legnica-Glogow Copper Basin
    mineral fertilization
    Humidol Standard
    organic fertilization
    Opis:
    Effect of organic ( with Humidol Standard) and mineral (with NPK) fertilization on some physico-chemical and chemical properties of sandy soils in the LGOM region were studied.The experiment was founded with two factors and a sub-block method.Humidol Standard was intro- duced once, and minerał fertilisation each year. The studies showed that fertilisation with Humidol Standards inereased the amount of organie matter, improved fraction composition of humic com- pounds and physico-chemical properties of sandy soils. Fertilisation with Humidol Standard com- bined with NPK can be a safe agrotechnical treatment that improves soil fertility in a short period of time in the region of LGOM.
    Źródło:
    Acta Agrophysica; 2000, 35; 117-127
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First report of endosymbionts in Dreissena polymorpha from the brackish Curonian Lagoon, SE Baltic Sea
    Autorzy:
    Chuseve, R.
    Mastitski, S.E.
    Zaiko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/48408.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Dreissena polymorpha
    zebra mussel
    Conchophthirus acuminatus
    parasitic ciliate
    Ophryoglena
    brackish water
    endosymbiont
    Curonian Lagoon
    Baltic Sea
    water salinity
    water temperature
    Źródło:
    Oceanologia; 2012, 54, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formy prochnicy w pionowych strefach klimatyczno-glebowych Karkonoszy
    Autorzy:
    Drozd, J
    Licznar, S.E.
    Licznar, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/797690.pdf
    Data publikacji:
    1993
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    gleby strefowe
    warunki glebowo-atmosferyczne
    gleby
    gleboznawstwo
    prochnica
    formy prochnicy
    Karkonosze
    gleby miedzystrefowe
    Opis:
    Badano transformację materii organicznej w glebach strefowych i międzystrefowych Karkonoszy. Wykazano, że współdziałanie czynników klimatycznych wraz z roślinnością przyczyniło się do nagromadzenia form próchnicy nakładowej typu moder i mor z udziałem humiskelu i mullicolu w glebach strefowych. W glebach międzystrefowych dominującą formą próchnicy nakładowej jest mor zawierający humiskel i humicol. Skład frakcyjny związków próchnicznych w glebach strefovvych jest odzwierciedleniem zachodzących w nich procesów glebowych.
    The transformation of organic matter in zonal and intrazonal soils of Karkonosze Mountains was studied. It was shown that interaction of climatic factors together plants was a main reason of accumulation of moder and mor type of ectohumus with participation of humiskel and mullicol in zonal soils. In the intrazonal soils dominant form of ectohumus is mor, which consists of humiskel and humicol. The fractional composition of humus compounds in zonal soils is the reflection of soil forming processes.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 1993, 411; 149-156
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the metabolism of the skeleteal muscles of guinea pigs caused by the invasion of Trichinella spiralis. I. Influence of the invasion on the carbohydrate metabolism of muscles
    Zmiany metabolizmu mięśni świnek morskich pod wopływem inwazji Trichinella spiralis. I. Wpływ inwazji na przemianę cukrową mięśni
    Izmenenija metabolizma myshc morskikh svinok pod vlijaniem invazii Trichinella spiralis. I. Vlijanie invazii na sakharnyjj obmen v myshcakh
    Autorzy:
    Karpiak, S.E.
    Kozar, Z.
    Krzyzanowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/836710.pdf
    Data publikacji:
    1963
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Annals of Parasitology; 1963, 09, 5
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The choristoderan reptile Monjurosuchus from the Early Cretaceous of Japan
    Autorzy:
    Matsumoto, R
    Evans, S.E.
    Manabe, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/19928.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Reptilia
    Early Cretaceous
    Japan
    Choristodera
    fossil
    Cretaceous
    Monjurosuchus
    Kuwajima Formation
    paleontology
    choristoderan reptile
    Tetori Group
    Opis:
    The choristoderan reptile Monjurosuchus is described from the Lower Cretaceous Tetori Group of Japan on the basis of an associated specimen from the Kuwajima Formation, Ishikawa Prefecture, and more fragmentary remains from the contemporaneous Okurodani Formation, Gifu Prefecture. This is the first report of Monjurosuchus from Japan, but a long−necked choristodere, Shokawa, has already been recorded from these deposits. Monjurosuchus was first described from the Lower Cretaceous Jehol Biota of China, although it has only recently been recognised as a choristodere. As reconstructed, the Japanese Monjurosuchus differs from the type species, Monjurosuchus splendens, in the structure of the postorbital region, reduction of the quadratojugal, a slender parietal with a deep groove along the interparietal suture, and elongation of the jugal. As in M. splendens, the lower temporal fenestrae are closed. A cladistic analysis was performed in order to place Japanese and Chinese taxa, including the incompletely described Chinese long−necked Hyphalosaurus lingyanensis, into choristoderan phylogeny. The results support the monophyly of Neochoristodera and of a Sino−Japanese clade of long necked choristoderes. The placement of the European Tertiary Lazarussuchus remains problematic, but the analysis supports its placement within Choristodera rather than on the stem. The identification of Monjurosuchus from Japan provides an additional link between the fossil assemblages of the Tetori Group and those of the slightly younger Jehol Biota of China.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sklad ilosciowy i jakosciowy zwiazkow prochnicznych gleb deluwialnych Plaskowyzu Glubczyckiego
    Autorzy:
    Licznar, M
    Drozd, J.
    Licznar, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/796376.pdf
    Data publikacji:
    1993
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    Plaskowyz Glubczycki
    sklad frakcyjny
    zwiazki prochniczne
    sklad ilosciowy
    gleboznawstwo
    gleby deluwialne
    Opis:
    Badano skład ilościowy i jakościowy związków próchnicznych gleb deluwialnych położonych u podnóży zboczy o przeciętnych spadkach: < 3%, 3-6% i > 10% na obszarach czarnoziemów leśno- stepowych, szarych gleb leśnych i gleb brunatnych. Stwierdzono, że w kształtowaniu składu ilościowego i jakościowego związków próchnicznych gleb deluwialnych dominującą rolę odgrywa kierunek procesu humifikacji w glebach wierzchowin.
    The quantitative and qualitative composition of humus in deluvial soils of Glubczvcki Plateau was studied. The investigated soils were located at the base of slopes with different average inclination: < 3%, 3-6%, 6-10% and > 10%, on the areas of forest-steppe chernozems, grey forest soils and brown soils. It was found, that direction of humification process in the soils of uplands play dominat role in formation of quantitative and qualitative composition of humus in the deluvial soils located at the foot of slopes.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 1993, 411; 139-148
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the metabolism of the skeleteal muscles of guinea pigs caused by the invasion of Trichinella spiralis. I. Influence of the invasion on the carbohydrate metabolism of muscles
    Zmiany metabolizmu mięśni świnek morskich pod wopływem inwazji Trichinella spiralis. I. Wpływ inwazji na przemianę cukrową mięśni
    Izmenenija metabolizma myshc morskikh svinok pod vlijaniem invazii Trichinella spiralis. I. Vlijanie invazii na sakharnyjj obmen v myshcakh
    Autorzy:
    Karpiak, S.E.
    Kozar, Z.
    Krzyżanowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2179507.pdf
    Data publikacji:
    1963
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Wiadomości Parazytologiczne; 1963, 09, 5; 435-446
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The youngest ctenocystoids from the Upper Ordovician of the United Kingdom and the evolution of the bilateral body plan in echinoderms
    Autorzy:
    Rahman, I.A.
    Stewart, S.E.
    Zamora, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/945494.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Echinodermata
    Ctenocystoidea
    evolution
    bilateral symmetry
    Ordovician
    ctenocystoid
    Upper Ordovician
    United Kingdom
    bilateral body
    echinoderm
    Opis:
    During the early Palaeozoic, echinoderm body plans were much more diverse than they are today, displaying four distinct types of symmetry. This included the bilateral ctenocystoids, which were long thought to be restricted to the Cambrian. Here, we describe a new species of ctenocystoid from the Upper Ordovician of Scotland (Conollia sporranoides sp. nov.). This allows us to revise the genus Conollia, which was previously based on a single poorly-known species from the Upper Ordovician of Wales (Conollia staffordi). Both these species are characterized by a unique morphology consisting of an elongate-ovoid body covered in spines, which clearly distinguishes them from their better-known Cambrian relatives; they are interpreted as infaunal or semi-infaunal burrowers from deep-water environments. This indicates that the ctenocystoid body plan was not fixed early in the evolution of the group, and they most likely modified their structure as an adaptation to a new mode of life in the Ordovician.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 1; 39-48
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acceleration of cheese ripening by the use of Lac mutants of group N-streptococci
    Przyspieszenie procesu dojrzewania sera przy użyciu mutantów Lac paciorkowców mlekowych z grupy N
    Autorzy:
    Abrahamsen, R.K.
    Birkeland, S.E.
    Langsrud, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399383.pdf
    Data publikacji:
    1989
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    cheese ripening
    proteolytic enzymes
    Lac-mutants of group N-streptococcci
    Opis:
    The paper presents the results indicating the possibility of reduction of the ripening period of cheese by one month using starter based on Lac⁻-mutants of group N-3 treptococci in addition to ordinary cheese starter. Schemes for preparation of Lac⁻-starters are given.
    We wstępie artykułu podano informacje na temat różnych sposobów przyspieszania procesu dojrzewania sera. Należą tu 3 grupy metod: a) oparte na użyciu zmodyfikowanych zakwasów w połączeniu ze zwykłymi zakwasami, w tym: zakwasami modyfikowanymi zawierającymi mutanty bakterii mlekowych nie fermentujące laktozy (Lac⁻ ), mutanty indukowane promieniami UV lub jonizującymi, bakterie poddane szokowi termicznemu (przez ogrzanie lub zamrożenie), martwe komórki bakteryjne, komórki autolizowane lub ekstrakty komórkowe b) polegające na dodatku pojedynczych enzymów lub ich mieszanin do mleka lub ziarna serowego, c) inne metody jak: podwyższona temperatura dojrzewania, zwiększona ilość zakwasu, dodatek homogenatu sera do mleka lub do ziarna serowego, użycie mleka z częściowo shydrolizowaną laktozą. W dalszej części artykułu przedstawione są wyniki badań nad użyciem mutantów Lac⁻ paciorkowców mlekowych do przyspieszenia procesu dojrzewania sera. Dodatek do mleka zakwasu zawierającego ww. mutanty w połączeniu ze zwykłym zakwasem pozwala na znaczny wzrost zawartości biomasy bakteryjnej jako źródła enzymów proteolitycznych biorących udział w dojrzewaniu sera. Nie występuje przy tym obawa zmiany tempa przyrostu zawartości kwasu mlekowego w mleku serowarskim podczas wyrobu sera i w pierwszym etapie jego dojrzewania. Zaproponowano dwa sposoby przygotowania i użycia mutantów Lac⁻ paciorkowców mlekowych. Na przykładzie produkcji sera typu Saint Paulin i Gouda (Norvegia) wykazano możliwość skrócenia czasu dojrzewania o 1 miesiąc dzięki zastosowaniu ww. metody co pozwala na znaczne obniżenie kosztów produkcji sera.
    Źródło:
    Acta Alimentaria Polonica; 1989, 15(39), 2; 121-131
    0137-1495
    Pojawia się w:
    Acta Alimentaria Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of SiC Coating of Carbon Fiber on Mechanical Properties in Short Carbon Fiber Reinforced Al Matrix Composite
    Autorzy:
    Jang, Jin Man
    Ko, Se-Hyun
    Lee, Wonsik
    Powiązania:
    https://bibliotekanauki.pl/articles/2049151.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    short carbon fiber
    Al composite
    SiC coating
    mechanical property
    Opis:
    A356 Al composites reinforced by short carbon fiber were prepared through the 2-step process: fabrication of a composite precursor and ultrasonication of the precursor melt. The short carbon fibers were coated with 0.15~1.5 μm thick SiC layer by a car-bothermal reaction, and an amount of the carbon fiber reinforcement was determined to be 1.5 vol.% and 4.0 vol.%, respectively. The addition of the carbon fiber increased the hardness of A356 alloy. However, tensile strength did not increase in the as-cast composites regardless of the SiC coating and volume fraction of the carbon fiber, due to the debonding which reduced load transfer efficiency from matrix to fiber at the interface. After T6-treatment of the composites, a significant increase in strength occurred only in the composite reinforced by the SiC-coated short carbon fiber, which was considered to result from the formation of a precipitate improving the Al/SiC interfacial strength.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 4; 941-946
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effects of Grain Boundary Structures on Mechanical Properties in Nanocrystalline Al Alloy
    Autorzy:
    Jang, Jin Man
    Lee, Wonsik
    Ko, Se-Hyun
    Powiązania:
    https://bibliotekanauki.pl/articles/2049173.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nanocrystalline Al alloy
    Young’s modulus
    hardness
    nanoindentation
    low and high angle grain boundary
    Opis:
    This study investigates the effects of grain boundary structures on mechanical properties of nanocrystalline Al-0.7Mg-1.0Cu alloy using nanoindentation system. Grain boundary structure transforms to high angle grain boundaries from low angle ones with increase of heat treatment temperature and the transformation temperature is about 400°C. Young’s modulus and hardness are higher in sample with low angle grain boundaries, while creep length is larger in sample with high angle ones. These results indicate that progress of plastic deformation at room temperature is more difficult in sample with low angle ones. During compression test at 200°C, strain softening occurs in all samples. However, yield strength in sample with low angle grain boundaries is higher twice than that with high angle ones due to higher activation energy for grain boundary sliding.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 4; 971-975
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ intensywnych systemów prowadzenia drzew jabłoni odmiany Jonagold na żyzności i urodzajność gleby
    Influence of the intensive planting systems of apple tree jonagold cultivar on soil fertility and productivity
    Autorzy:
    Licznar, M.
    Licznar-Malanczuk, M.
    Licznar, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402324.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    Acta Agrophysica; 2001, 56; 145-154
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New albanerpetontid amphibians from the Early Cretaceous of Morocco and Middle Jurassic of England
    Autorzy:
    Gardner, J D
    Evans, S.E.
    Sigogneau-Russell, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/21595.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Early Cretaceous
    Middle Jurassic
    Cretaceous
    England
    Albanerpetontidae
    amphibian
    albanerpetontid amphibian
    Ramonellus
    Morocco
    Jurassic
    paleontology
    Lissamphibia
    Opis:
    A third albanerpetontid genus, Anoualerpeton gen. nov., is erected for two new species: An. unicussp. nov. (type species) from the Early Cretaceous (Berriasian) of Morocco and An. priscus sp. nov. from the Middle Jurassic (late Bathonian) of England. Anoualerpeton differs from the exclusively Laurasian albanerpetontid genera Albanerpeton (Early Cretaceous– Paleocene, North America; Miocene, Europe) and Celtedens (?Late Jurassic and Early Cretaceous, Europe) in a unique combination of primitive and derived character states of the jaws and azygous frontals. Monophyly of Anoualerpeton is supported by two synapomorphies of the maxilla and dentary (occlusal margin convex in labial outline and teeth strongly heterodont in size anteriorly) that are convergent with an unrelated, relatively derived Late Cretaceous species of Albanerpeton from North America. The two species of Anoualerpeton differ in character states of the premaxilla and azygous frontals. Cladistic analysis of 20 characters scored for ten albanerpetontid taxa postulates Anoualerpeton as the sister−taxon of Albanerpeton + Celtedens. The sister−pair of Albanerpeton + Celtedensis founded on one or, perhaps, two premaxillary synapomorphies. Anoualerpeton unicus documents the only known Gondwanan occurrence for the Albanerpetontidae and provides a minimum age of basal Cretaceous for the establishment of the clade in Africa. Characters of the mandible, vertebrae, and limbs support the interpretation that Ramonellus (Aptian; Israel) is a caudate, not an albanerpetontid.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Process Design for Size-Controlled Flame Spray Synthesis of Li4Ti5O12 and Electrochemical Performance
    Autorzy:
    Waser, O.
    Brenner, O.
    Groehn, A.J.
    Pratsinis, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/952680.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Li-ion battery
    Li4Ti5O12
    size control
    residence time distribution computational fluid
    dynamics
    flame synthesis of electroceramics
    bateria litowo-jonowa
    kontrola rozmiaru
    płyn obliczeniowy do dystrybucji czasu przebywania
    dynamika
    synteza płomieniowa elektroceramiki
    Opis:
    Inexpensive synthesis of electroceramic materials is required for efficient energy storage. Here the design of a scalable process, flame spray pyrolysis (FSP), for synthesis of size-controlled nanomaterials is investigated focusing on understanding the role of air entrainment (AE) during their aerosol synthesis with emphasis on battery materials. The AE into the enclosed FSP reactor is analysed quantitatively by computational fluid dynamics (CFD) and calculated temperatures are verified by Fourier transform infrared spectroscopy (FTIR). Various Li4Ti5O12 (LTO) particle compositions are made and characterized by N2 adsorption, electron microscopy and X-ray diffraction while the electrochemical performance of LTO is tested at various charging rates. Increasing AE decreases recirculation in the enclosing tube leading to lower reactor temperatures and particle concentrations by air dilution as well as shorter and narrower residence time distributions. As a result, particle growth by coagulation - coalescence decreases leading to smaller primary particles that are mostly pure LTO exhibiting high C-rate performance with more than 120 mAh/g galvanostatic specific charge at 40C, outperforming commercial LTO. The effect of AE on FSP-made particle characteristics is demonstrated also in combustion synthesis of LiFePO4 and ZrO2.
    Źródło:
    Chemical and Process Engineering; 2017, 38, 1; 51-66
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A low emission coastal cruise vessel – MV havila capella
    Autorzy:
    Berg, T.E.
    Moe, S.E.
    Leinebø, D.
    Rabliås, Ø
    Powiązania:
    https://bibliotekanauki.pl/articles/24201391.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    analogical manoeuvring simulator
    in-situ model test
    sea trial test
    low emission
    passenger vessels
    batteries
    CFD method
    wind model
    Opis:
    Since January 2021, Havila Kystruten has been one of two companies sailing the coastal route between Bergen and Kirkenes. This paper contains information on the new shipping company Havila Kystruten and their 2019 bid for a 10-year operational license to sail the coastal route. The government's tender documents for the new license specified that the vessels operating the route had to be low-emission vessels. This requirement was in line with the government's white paper on the reduction of emissions for commercial and fishing vessels sailing in Norwegian waters. Thus, companies bidding for the new license had to offer new ships with low emission characteristics or rebuild existing vessels to obtain the low emission requirements. Based on the offers, the government decided to split the operational license between two companies. One part was given to the company previously operating the route (Hurtigruten) and the other to the new company Havila Kystruten. While Hurtigruten would rebuild the engine systems on some of their existing vessels, Havila Kystruten would operate the route using new vessels with low emission signature. The design requirements for these vessels were given by Havila Kystruten to the ship designer, Havyard Design and Solutions (now HAVDesign). Some of the requirements are listed in section 4 below. The latter part of this paper investigates the manoeuvring performance of the new Havila Kystruten vessels, containing a summary of a Research Council of Norway funded innovation project on harsh weather ship handling during port operations. The Port of Trondheim was selected as a case study.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 165--170
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of Sound Insulation Through Double-Panel Structure by Using Hybrid Local Resonator Array
    Autorzy:
    Ri, Kyong-Su
    Kim, Myong-Jin
    Son-U, Se-Hyon
    Powiązania:
    https://bibliotekanauki.pl/articles/31339917.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    sound insulation
    local resonance
    insertion loss
    sonic crystal
    Opis:
    In this paper, we present one approach to improve the soundproofing performance of the double-panel structure (DPS) in the entire audible frequencies, in which two kinds of local resonances, the breathing-type resonance and the Helmholtz resonance, are combined. The thin ring resonator row and slit-type resonator (Helmholtz resonator) row are inserted between two panels of DPS together. Overlapping of the band gaps due to the individual resonances gives a wide and high band gap of sound transmission in the low frequency range. At the same time, the Bragg-type band gap is created by the structural periodicity of the scatterers in the high audible frequency range. In addition, the number of scatterer rows and the filling factor are investigated with regard to the sound insulation of DPS with sonic crystals (SCs). Consequently, the hybrid SC has the potential of increasing the soundproofing performance of DPS in the audible frequency range above 1 kHz by about 15 dB on average compared to DPS filled only with glass wool between two panels, while decreasing the total thickness and mass compared to the counterparts with the other type of local resonant sonic crystal.
    Źródło:
    Archives of Acoustics; 2023, 48, 1; 63-70
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prime Factorization And Domination In The Hierarchical Product Of Graphs
    Autorzy:
    Anderson, S.E.
    Guob, Y.
    Tenney, A.
    Wash, K.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341604.pdf
    Data publikacji:
    2017-11-27
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    generalized hierarchical product
    Cartesian product
    prime fac- tor decomposition
    Opis:
    In 2009, Barrière, Dalfó, Fiol, and Mitjana introduced the generalized hierarchical product of graphs. This operation is a generalization of the Cartesian product of graphs. It is known that every connected graph has a unique prime factor decomposition with respect to the Cartesian product. We generalize this result to show that connected graphs indeed have a unique prime factor decomposition with respect to the generalized hierarchical product. We also give preliminary results on the domination number of generalized hierarchical products.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2017, 37, 4; 873-890
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Pd-P Layer on the Bonding Strength of Bi-Te Thermoelectric Elements
    Autorzy:
    Bae, Sung Hwa
    Han, Se Hun
    Son, Injoon
    Kim, Kyung Tae
    Powiązania:
    https://bibliotekanauki.pl/articles/353621.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bismuth telluride
    thermoelectric module
    electroless Pd-P plating
    bonding strength
    Opis:
    In this study, the effect of electroless Pd-P plating on the bonding strength of the Bi-Te thermoelectric elements was investigated. The bonding strength was approximately doubled by electroless Pd-P plating. Brittle Sn-Te intermetallic compounds were formed on the bonding interface of the thermoelectric elements without electroless Pd-P plating, and the fracture of the bond originated from these intermetallic compounds. A Pd-Sn solder reaction layer with a thickness of approximately 20 μm was formed under the Pd-P plating layer in the case of the electroless Pd-P plating, and prevented the diffusion of Bi and Te. In addition, the fracture did not occur on the bonding interface but in the thermoelectric elements for the electroless Pd-P plating because the bonding strength of the Pd-Sn reaction layer was higher than the shear strength of the thermoelectric elements.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 963-968
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plants containing cardiac glycosides showing antiphytoviral activity against Potato virus Y (PVYNTN) on tobacco plants
    Autorzy:
    Yazdi, S.E.
    Mulabisana, J.
    Prinsloo, G.
    Cloete, M.
    Kritzinger, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/66680.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    plant disease
    Solanaceae
    tobacco plant
    cardiac glycoside
    antiphytoviral activity
    potato virus Y
    Potyvirus
    Potyviridae
    Opis:
    The tuber necrotic strain of Potato virus Y (PVYNTN) causes widespread disease and has severe negative effects on the growth and yields of plants, especially those of the Solanaceae family. The consequences of residual toxicity and non-biodegradation of synthetic chemicals and pollution of the environment has led to investigations into new non-toxic and biological treatments to control plant viral diseases. Ethanolic extracts of Bowiea volubilis (bulbs), Cotyledon orbiculata (leaves), Gomphocarpus fruticosus (leaves), Merwilla plumbea (dry and fresh bulbs), Nerium oleander (leaves), and the fruits and leaves of Strophanthus speciosus, were evaluated against PVYNTN in vivo and in vitro. At a concentration of 20 mg · ml−1, ethanolic extracts of Strophanthus speciosus (leaves) and fruits (50 mg · ml−1) significantly reduced the expression of PVYNTN symptoms on tobacco plants in vitro without affecting the normal growth and development of the plant. Similarly, at 50 mg · ml−1, N. oleander, C. orbiculata and B. volubilis (fresh bulbs) and S. speciousus leaves at 20 mg · ml−1 extracts showed significant differences in PVYNTN symptoms in the in vivo experiment. Strophanthus speciosus leaf and fruit extracts showed significant inhibition in the in vitro and in vivo assays and demonstrated that S. speciosus has potential to be used as an antiphytoviral treatment.
    Źródło:
    Journal of Plant Protection Research; 2018, 58, 4
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of sway and roll excitations on sloshing loads in a KC-1 membrane LNG tank
    Autorzy:
    An, Se-yeol
    Jeong, Hyeon-won
    Kim, Ohyoung
    Shim, W. Jaewoo
    Powiązania:
    https://bibliotekanauki.pl/articles/34600997.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    KC-1 membrane LNG tank
    sloshing
    sway
    roll
    coupled sway-roll
    Fast Fourier transform (FFT)
    Opis:
    This study investigates the effects of sway and roll excitations on sloshing liquid loads in a tank, using Ansys Fluent software. The model considered in the study is a 1:50 scaled membrane-type tank, based on a KC-1 membrane LNG tank designed by Korea Gas Corporation (KOGAS). The volume of fluid (VOF) method is used to track the free surface inside the tank, and the standard k-ε model is applied to express the turbulent flow of the liquid. To explore the motion of the tank under excitation, a user-defined function (UDF) and a dynamic mesh technique are employed to control the external forces exerted on the tank through its motion. The results, in the form of time series data on the sloshing pressures in the tank under pure sway, roll, and coupled sway-roll, are analysed, with specific ranges for the excitation amplitudes and frequencies. We show that variations in excitation frequency and amplitude significantly influence the sloshing loads. Sloshing loads are found to intensify when the excitation frequency matches the tank’s primary natural frequency, 1.0 ω'1. Furthermore, with coupled sway-roll excitations, the sloshing loads are weakened when the sway and roll are in-phase and are intensified when these are out-of-phase. Fast Fourier transform analysis provides insights into the frequency domain, showing that the dominant frequency is 0.88 Hz and it is approximately equal to the tank’s primary natural frequency, 1.0 ω'1.
    Źródło:
    Polish Maritime Research; 2023, 4; 43-53
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    English language teachers’ conceptualizations of one-to-one private tutoring: An international phenomenographic study
    Autorzy:
    Werbińska, Dorota
    Bozyiǧit, Elif
    Guerra, Luis
    Ekiert, Małgorzata
    Kӧse, Serhan
    Powiązania:
    https://bibliotekanauki.pl/articles/911931.pdf
    Data publikacji:
    2019-12-15
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    English private tutoring
    henomenography
    language teachers
    teachers’ conceptualizations
    Opis:
    Private English tutoring, understood as the paid English teaching service offered to students to supplement their learning of English at school or prepare them for an examination in English, has become a popular out-of-school learning activity. In order to obtain deeper insights into its intricacies, the need arises to examine the experience of one of its pivotal stakeholders – the private tutors. This article is based on a phenomenographic study with a view to investigating the conceptions of private tutoring held by 15 English teachers from three countries (Poland, Portugal, and Turkey) who offer private teaching services in English in their local contexts. The findings suggest that there are at least three conceptions according to which private tutoring can be experienced by the participants: as a source of income, as helping, and as professional development. The study also poses the question if there is space for formal training of private tutors and calls for further research into English private tutoring
    Źródło:
    Glottodidactica. An International Journal of Applied Linguistics; 2019, 46, 2; 175-196
    0072-4769
    Pojawia się w:
    Glottodidactica. An International Journal of Applied Linguistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aerosol loading and its effect on respiratory dysfunction disorder over Dapaong-Togo
    Autorzy:
    Emetere, M.E.
    Sanni, S.E.
    Okoro, E.E.
    Adeyemi, G.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/886308.pdf
    Data publikacji:
    2018
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2018, 27, 4[82]
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial variability of uncultivated soils in derived savanna
    Autorzy:
    Obalum, S.E.
    Oppong, J.
    Igwe, C.A.
    Watanabe, Y.
    Obi, M.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/25426.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    The spatial variability of some physicochemical properties of topsoils/subsoils under secondary forest, grassland fallow, and bare-soil fallow of three locations was evaluated. The data were analyzed and described using classical statistical parameters. Based on the coefficient of variation, bulk density, total porosity, 60-cm-tension moisture content, and soil pH were of low variability. Coarse and fine sand were of moderate variability. Highly variable soil properties included silt, clay, macroporosity, saturated hydraulic conductivity, organic matter concentration, and cation exchange capacity. Overall, soil pH and silt varied the least and the most, respectively. Relative weighting showed that location dominantly influenced the soil variability, except for soil porosity and organic matter concentration influenced mostly by land use. Most of the soil data were normally distributed; others were positively skewed and/or kurtotic. The minimum number of samples (at 25 samples ha-1) required to estimate mean values of soil properties was highly soil property-specific, ranging from 1 (topsoil pH-H2O) to 246 (topsoil silt). Cation exchange capacity of subsoils related fairly strongly with cation exchange capacity of topsoils (R2 = 0.63). Spatial variability data can be used to extrapolate dynamic soil properties across a derived-savanna landscape.
    Źródło:
    International Agrophysics; 2013, 27, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revealing body proportions of the enigmatic choristodere reptile Khurendukhosaurus from Mongolia
    Autorzy:
    Matsumoto, R.
    Tsogtbaatar, K.
    Ishigaki, S.
    Tsogtbaatar, C.
    Enkhtaivan, Z.
    Evans, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/22991.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Khurendukhosaurus is an enigmatic genus of choristodere, recorded from the Lower Cretaceous of East Asia, Mongolia, and Siberian Russia. Until now, it was known only from isolated skull and postcranial elements, limiting comparison with other genera. Three major morphotypes have been recognised within Choristodera: longirostrine neochoristoderes with short-necks, and brevirostrine non-neochoristoderes with either short or long necks. The morphotype of Khurendukhosaurus was uncertain, although it had been inferred to be long-necked, based on cervical and caudal vertebral morphology shared with the Chinese Hyphalosaurus and on the results of phylogenetic analysis that placed it within a clade of Sino-Japanese long-necked taxa. Newly discovered material from the Mongolian type locality, Khuren-Dukh, preserves most major postcranial elements of a single individual. This specimen confirms that Khurendukhosaurus belongs to the long-necked morphotype, in having at least 13 cervical vertebrae. Moreover, a new phylogenetic analysis supports the placement of Khurendukhosaurus as a sister group of the Hyphalosaurus + Shokawa clade. Based on the new material, Khurendukhosaurus is estimated to have been roughly 1 m in total length, placing it at the upper end of the size range for long-necked choristoderes.
    Źródło:
    Acta Palaeontologica Polonica; 2019, 64, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Puddling intensity for late-season sawah systems based on soil hydrophysical conditions and rice performance
    Autorzy:
    Obalum, S.E.
    Watanabe, Y.
    Igwe, C.A.
    Obi, M.E.
    Wakatsuki, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/26457.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    puddling intensity
    late-season sawah system
    soil condition
    hydrophysical condition
    rice
    grain yield
    Oryza sativa
    performance
    Opis:
    Lowland sawah farmers often puddle to improve soil hydrophysical conditions for rice, but the puddling intensity beyond which no extra yield increases occur is unknown. Agro- nomic effects of six mechanical puddling intensities were assessed in three Nigerian inland-valley bottoms. All puddled plots, irrespec- tive of intensity, produced similar effects at all three locations. At 10 days after transplanting, soil bulk density of all puddled plots re- presented mean decreases relative to control plots of about 22.4, 15.8, and 31.7% at Akaeze, Adani, and Ejeti, respectively. Soil bulk density and moisture content upon saturation were similar during 40-120 days after transplanting. All puddled plots consistently showed taller plants and greater tillering than control plots only at Ejeti. Grain yields were similar among treatments in Akaeze and Adani (mean, 3.71 and 6.42 Mg ha -1 , respectively), but one-pass puddling yielded numerically highest in both locations. At Ejeti, grain yields followed the trend for plant growth, with mean values of 4.36 and 1.81 Mg ha -1 for puddled and control plots, respecti- vely. One-pass puddling may be sufficient for sawah rice grown late particularly in less humid environments.
    Źródło:
    International Agrophysics; 2014, 28, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Fe-Mn Solid Solution Precursor Addition on Modified AA 7075
    Autorzy:
    Kim, Min Sang
    Kim, Dae Young
    Kim, Young Do
    Choi, Hyun Joo
    Kim, Se Hoon
    Powiązania:
    https://bibliotekanauki.pl/articles/2049310.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Zn-Mg alloy
    solid solution precursor
    mechanical properties
    Opis:
    This study suggests a new way to modify the size and morphology of Al-Fe phases in modified AA 7075 by using an Fe-Mn solid solution powder as the precursor. When Fe and Mn are added in the form of a solid solution, the diffusion of Fe and Mn toward the Al is delayed, thus altering the chemical composition and morphology of the precipitates. The fine, spherical precipitates are found to provide a good balance between strength and ductility compared to the case where Fe and Mn are separately added.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 783-787
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Allelopathic efficiency of Eruca sativa in controlling two weeds associated with Pisum sativum plants
    Autorzy:
    El-Wakeel, M.A.
    Ahmed, S.E.-D.A.E.-G.
    El-Desoki, E.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/66437.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Allelopathy is a complex phenomenon which depends on allelochemical concentrations. So, two pot experiments were carried out to investigate the allelopathic effect of alcoholic fresh shoot extract of Eruca sativa (foliar spray) and E. sativa shoot powder (mixed with soil) on Pisum sativum plants and two associated weeds, Phalaris minor and Beta vulgaris. The experiments were conducted in the greenhouse of the National Research Centre, Giza, Egypt during two successive winter seasons (2016–2017 and 2017–2018). Ten treatments were applied in this study. Four treatments were applied before sowing, that E. sativa shoot powder was mixed with the soil at rates of 15, 30, 45 and 60 g ⋅ pot–1. The other four treatments of E. sativa alcoholic fresh shoot extract were sprayed twice on both plants and weeds at 5, 10, 15 and 20% (w/v) concentrations. Additionally, two untreated treatments, healthy (P. sativum only) and unweeded (untreated infested P. sativum plants with weeds) were applied for comparison. The results indicated that both alcoholic extracts and powder reduced growth of both weeds. Moreover, there was a direct relationship between concentration and weed reduction. Eruca sativa alcoholic extracts increased yield parameters of P. sativum plants. The maximum yield attributes were recorded by spraying of E. sativa alcoholic extract at 20%. On the other hand, it was clearly noticed that the high powder rates affected negatively P. sativum yield parameters. But the lowest powder rate (15 g ⋅ pot–1) stimulated P. sativum yield parameters as compared to unweeded treatment. Chemical analysis of E. sativa shoot powder ensured that the abundant amount of glucosinolates (9.6 μmol ⋅ g–1) and phenolic compounds (46.5 mg ⋅ g–1) may be responsible for its allelopathic effect. In conclusion, spraying of alcoholic fresh shoot extract of E. sativa at 20% (w/v) and mixing E. sativa shoot powder at 15 g · pot–1can be applied as natural bioherbicides for controlling weeds.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the inhibitory-bactericidal effect of amidoamine-based inorganic complexes against microbiological and atmospheric corrosion
    Autorzy:
    Aghazada, Y.J.
    Abbasov, V.M.
    Mursalov, N.I.
    Abdullayev, S.E.
    Yolchuyeva, U.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/778541.pdf
    Data publikacji:
    2020
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    corrosion
    inhibitor
    bactericide
    adsorption
    amidoamine
    Opis:
    In the process, inorganic complexes of amidoamines obtained from the interaction of natural petroleum acid and oleic acids with diethylenetriamine have been developed and their effectiveness as inhibitor-bactericides has been investigated. The effect of the synthesized reagents on the kinetics of the corrosion process of steel and the activity of sulphate-reducing bacteria in 3% NaCl solution saturated with CO2 and in the biphasic water–isopropyl alcohol medium with H2S dissolved has been analyzed. The thermodynamic and kinetic parameters of the corrosion process were calculated. The adsorption of the complexes was investigated using the Langmuir isotherm and the correlation constant was determined. State of the metal surface was investigated by SEM method in CO2 and H2S media, with and without inhibitors, and the metal surface contact of complexes was studied by computer molecular simulation.
    Źródło:
    Polish Journal of Chemical Technology; 2020, 22, 3; 29-37
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on Improvement of Surface Properties of Low Carbon Steel Using Laser Cladding
    Autorzy:
    Kim, Cheol-Woo
    Yoo, Hyo-Sang
    Jeon, Jae-Yeol
    Cho, Kyun-Taek
    Choi, Se-Weon
    Powiązania:
    https://bibliotekanauki.pl/articles/2048888.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser cladding
    vickers hardness
    microstructure
    surface treatment
    Opis:
    Laser cladding is a method that can be applied to repair the crack and break on the mold and die surfaces, as well as generate new attributes on the surface to improve toughness, hardness, and corrosion resistance. It is used to extend the life of the mold. It also has the advantages of superior bonding strength and precision coating on a local area compared with the conventional thermal spraying technology. In this study, we investigated the effect of cladding on low carbon alloy steel using 18%Cr-2.5%Ni-Fe powder (Rockit404), which showed high hardness on the die surface. The process conditions were performed in an argon atmosphere using a diode laser source specialized for 900-1070 nm, and the output conditions were 5, 6, and 10 kW, respectively. After the cladding was completed, the surface coating layer’s shape, the hardness according to the cross-section’s thickness, and the microstructure were analyzed.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 4; 1033-1036
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Welding Conditions on Microstructural Evolution of Friction-Stir-Welded Ti-Cu Plate
    Autorzy:
    Lee, Yong-Jae
    Jeong, Won-Ki
    Lee, Seung-Jun
    Fujii, Hidetoshi
    Shin, Se Eun
    Lee, Dong-Geun
    Powiązania:
    https://bibliotekanauki.pl/articles/2203730.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    friction stir welding
    Ti-Cu dissimilar welding
    intermetallic compounds
    welding speed
    Opis:
    Fusion welding of Ti-Cu is difficult because of big difference of melting points and formation of brittle intermetallic compounds. Friction stir welding is carried out by solid-state joining, thermo-mechanical stirring, and friction heat. Ti-Cu FSW dissimilar welding can supply a very sound joint area with a few intermetallic compounds. Optimized welding process conditions are essential to obtain suitable microstructure and mechanical properties of welded zones. Different welding speeds affect the evolution of microstructure and mechanical properties due to changes of input heat and internal stored deformation energy. The correlation of microstructure and mechanical properties of Ti-Cu welded zone according to welding speeds were investigated and analyzed. As the higher the welding speed, the lower the heat input and the lower the temperature rise. Ti-Cu 75 has the smallest grain size at 13.9 μm, but the optimum mechanical properties and the integrity of welding were shown in Ti-Cu 50.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 131--135
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: recovery, identification and evaluation of their antioxidant activities
    Autorzy:
    Koubaa, M.
    Ktata, A.
    Barba, F.J.
    Grimi, N.
    Mhemdi, H.
    Bouaziz, F.
    Driss, D.
    Chaabouni, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/25448.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2015, 29, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of Aluminum Matrix Composite Reinforced with Al0.5CoCrCuFeNi High-Entropy Alloy Particles
    Autorzy:
    Kim, Min Sang
    Son, Han Sol
    Joo, Gyeong Seok
    Kim, Young Do
    Choi, Hyun Joo
    Kim, Se Hoon
    Powiązania:
    https://bibliotekanauki.pl/articles/2174583.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum matrix composite
    high entropy alloys
    reinforcement
    powder-in-tube
    stir casting
    Opis:
    The aluminum composite with dispersed high entropy alloy were developed by stir casting involving the powder-in-tube method. First, Al0.5CoCrCuFeNi high entropy alloy (HEA) powder was made by mechanical alloying, and the powder was extruded in a tube-type aluminum container to form HEA precursor. The extruded HEA precursor was then dispersed in the aluminum matrix via stir casting. As a result, Fe-Cr-Ni based high-entropy phases was uniformly formed in the aluminum matrix, revealing ~158, 166, 235% enhancement of tensile strength by incorporating 1, 3, and 5 wt% HEA particles, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1543--1546
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prandial and postprandial exocrine pancreatic secretion after duodenal infusion of alfa-ketoglutarate, formic acid and potassium di-formate in pigs
    Autorzy:
    Filip, R.
    Kruszewska, D.
    Valverde Piedra, J.L.
    Szymanczyk, S.E.
    Studzinski, T.
    Radzki, R.P.
    Bienko, M.
    Pierzynowski, S.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/3153.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2007, 01, 1
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gamma radiation treated chitosan solution for strawberry preservation: Physico-chemical properties and sensory evaluation
    Autorzy:
    Jesmin, S.
    Al-Jubayer, A.
    bin Eusuf, S.
    Kamal, A.H.M.
    Islam, J.M.M.
    Ferdoush, F.
    Kabir, S.E.
    Khan, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11054.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2016, 60
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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