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    Wyświetlanie 1-16 z 16
    Tytuł:
    Evaluation of some water extraction models in predicting water uptake of pigeonpea
    Autorzy:
    Ogunremi, L.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/25561.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    water uptake
    soil
    genotype
    pigeon-pea
    water flow
    water extraction
    Źródło:
    International Agrophysics; 1996, 10, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some physical parameters in relation to water extraction by roots of two pigeonpea genotypes
    Autorzy:
    Ogunremi, L.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/25012.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil
    genotype
    physical parameter
    pigeon-pea
    hydraulic resistance
    water extraction
    root conductivity
    root
    Źródło:
    International Agrophysics; 1996, 10, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Waterloo MAPLE 9.5 and Wolfram MATHEMATICA 5.1 software for analytic solving of certain nonlinear partial differential equations of physics
    Zastosowanie pakietów MAPLE 9.5 oraz MATHEMATICA 5.1 do analitycznego rozwiązywania wybranych nieliniowych równań różniczkowych cząstkowych fizyki
    Autorzy:
    Stępień, Ł.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/952947.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    nieliniowe równania różniczkowe cząstkowe
    rozwiązania analityczne
    rozwiązania dokładne
    równanie Naviera-Stokesa
    równanie Monge'a-Ampere'a
    równanie stałego przepływu izentropowego
    nonlinear partial differential eguations
    analytic solutions
    exact solutions
    Navier-Stokes eguation
    Monge-Ampere eguation
    steady isentropic flow eguation
    Opis:
    In the current paper some applications of the packet MAPLE (v. 9.5) for analytic solying of certain nonline partial differential eguations have been presented. Additionally, for graphic presentation of the found solutions packet MATHEMATICA (v. 5.1) has been applied.
    W niniejszej pracy zostały przedstawione zastosowania pakietu MAPLE (wersja 9.5 do analitycznego znajdywania rozwiązań wybranych nieliniowych równań różniczkowych cząstkowych. Do prezentacji graficznej tych rozwiązań użyto pakietu MATHEMATICA (wersje 5.1).
    Źródło:
    Computer Science; 2008, 9; 147-155
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rola lasu i jego komponentow w ochronie przed skazeniem promieniotworczym
    Autorzy:
    Sviridiv, L.T.
    Kosicenko, N.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/46034.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    zawartosc pierwiastkow
    lasy
    funkcje lasu
    pierwiastki promieniotworcze
    funkcje ochronne
    lesnictwo
    skazenia promieniotworcze
    ochrona przed promieniowaniem
    drzewa lesne
    Źródło:
    Leśne Prace Badawcze; 2004, 3; 63-73
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Information and e-learning services for the efficient management of allergy and asthma, employing an integrated environment monitoring network
    Autorzy:
    Stalidis, G.
    Prentza, A.
    Maglavera, S.
    Kolovou, L.T.
    Chassomeris, C. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/309501.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    telematic services
    environment monitoring
    health information
    teleeducation
    Opis:
    In this paper we present a distributed telematic platform which is implemented to support health information management and innovative services to people suffering from allergies, asthma and rhinitis. The developed system establishes a trans-European information network offering specialized services to health professionals, patients and the public, by collecting, processing and distributing specialized data and informational content. An integrated monitoring and reporting system of aero-allergens is used to collect Pan-European environmental data and produce allergy maps, forecasting and danger level alerts. Informational content and e-learning resources are also consolidated and combined with personalized health management services. Through the created network, health information is supplied to sufferers via WWW and SMS technologies, and informational and learning resources are offered to health professionals. Sets of services were implemented in pilot form and offered to real users for testing purposes. The results were encouraging towards expansion to fully blown service at a Pan-European level.
    Źródło:
    Journal of Telecommunications and Information Technology; 2005, 4; 73-83
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetism in Rare-Earth-Transition Metal Systems. Magnetization Reversal and Ultra-High Susceptibility in Sandwiched Thin Films Based on Rare-earth and Cobalt Alloys
    Autorzy:
    Baczewski, L.T.
    Givord, D.
    Alameda, J. M.
    Dieny, B.
    Nozieres, J. P.
    Rebouillat, J. P.
    Prejean, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929319.pdf
    Data publikacji:
    1993-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.-m
    75.30.Gw
    75.70.-i
    75.70.Fr
    Opis:
    This paper is composed of two parts: theoretical and experimental. The theoretical part is divided into several sections. The main characteristic properties of 3d (transition metals) and 4f (rare-earth metals) magnetism are explained in the second section. The properties of rare-earth-transition metal compounds are discussed in the third section, particularly with respect to applications. The fourth section is devoted to the rapidly growing field of magnetic thin films. Specifrc properties of ultra-thin films and multilayers are summarized. In the experimental part the original magnetic properties of sandwich films, consisting of a soft amorphous Co-Zr layer placed between two Sm-Co layers with different coercivities, are reported.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 5; 629-641
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seed germination and emergence of Eragrostis tenuifolia (A. Rich.) Hochst. ex Steud. in response to environmental factors
    Autorzy:
    Bittencourt, H.H.
    da Silva Bonome, L.T.
    de Bortoli Pagnoncelli,Jr, F.
    Lana, M.A.
    Muzell Trezzi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/65859.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    seed germination
    emergence
    Eragrostis tenuifolia
    elastic grass
    weed
    plant response
    environmental factor
    irradiance
    temperature
    weed ecology
    weed number
    Opis:
    Eragrostis tenuifolia is a weed species that is gaining ground in Brazil. This weed occurs in pastures, grasslands, crop fields, and roadsides. The objective of this study was to examine the effects of different environmental factors on E. tenuifolia seed germination and seedling emergence. The optimum constant temperature for germination was around 35–30°C. It was also found that 85% of seeds germinated under a 30/20°C alternate temperature regime. Light appears to have a positive effect on seed germination. No seedlings emerged when seeds were buried 3 cm or deeper. The results suggested that E. tenuifolia has the potential to spread into pastures and in no-tillage crop systems in Brazil. Measures such as the use of cover crops and/or soil cultivation can be used to limit germination and seedling emergence, respectively.
    Źródło:
    Journal of Plant Protection Research; 2016, 56, 1
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of genetic diversity of local-colored rice landraces using SSR markers
    Autorzy:
    Thi Hue, H.
    Nghia, L.T.
    Minh, H.T.
    Anh, L.H.
    Thi Thu Trang, L.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11570.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2018, 67
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenolic compounds and antioxidant activity of Castanopsis phuthoensis and Castanopsis grandicicatricata
    Autorzy:
    Tuyen, P.T.
    Khang, D.T.
    Minh, L.T.
    Minh, T.N.
    Ha, P.T.T.
    Elzaawely, A.A.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11907.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this study, total phenolic and flavonoid contents, antioxidant capacity, and phenolic compositions of Castanopsis phuthoensis and Castanopsis grandicicatricata (Fagaceae family) were investigated. It was found that bark extracts were rich of phenolic contents, whereas leaf extracts were abundant of flavonoids. The total phenolics varied from 11.20 to 35.47 mg gallic acid equivalent g-1 dry weight (DW), and the total flavonoids were from 2.24 to 12.55 mg rutin equivalent g-1 DW. The results of antioxidant activity evaluation showed that the DPPH (1,1- diphenyl-2-picryl-hydrazyl) radical scavenging activity of the free phenolic extracts were higher than the bound phenolic extracts. Regarding the reducing power and β-carotene bleaching assays, the free phenolic extracts showed remarkably strong antioxidant capacity that were similar to the levels of the standard BHT (dibutyl hydroxytoluene) did. It could be concluded that free phenolic extracts were more effective in antioxidant activities than bound phenolic extracts. Highly significant correlations were observed between phenolic contents and antioxidant activities (0.813 for DPPH and 0.841 for reducing power). By HPLC analysis, seven phenolic acids were detected including gallic, p-hydroxybenzoic, vanillic, sinapic, p-coumaric, ellagic acids, and vanillin. Of which, gallic, ellagic, and sinapic acids were the most abundant compounds in the two species. The results suggest C. phuthoensis and C. grandicicatricata contain rich sources of natural antioxidants and phenolic compounds which are probably considered in pharmaceutical use.
    Źródło:
    International Letters of Natural Sciences; 2016, 55
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of salinity stress on growth and phenolics of rice (Oryza sativa L.)
    Autorzy:
    Minh, L.T.
    Khang, D.T.
    Ha, P.T.T.
    Tuyen, P.T.
    Minh, T.N.
    Quan, N.V.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11459.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    This study was conducted to determine the correlation between of salinity stress on growth and phenolic compounds in rice. It was observed that salinity stress caused a significant decrease in shoot lengths, fresh and dry weights of all rice varieties. Under salinity stress, changes of chemical contents also differed among phenolic compounds and rice cultivars. Total phenolics and flavonoids, and contents of vanillin and protocatechuic acid in tolerant varieties were strongly increased, whereas in contrast, they were markedly reduced in the susceptible cultivar. Ferulic acid and p-coumaric acid were detected only in tolerance rice. Vanillin and protocatechuic acid may play a role, but ferulic acid and p-coumaric acid may be much involved in the tolerant mechanism against salinity stress. Ferulic acid and p-coumaric acid and their derivatives are potent to be exploited as promising agents to reduce detrimental effects of salinity stress on rice production.
    Źródło:
    International Letters of Natural Sciences; 2016, 57
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cultural characteristics and cordycepin production of some Cordyceps militaris strains under artificial cultivation conditions
    Autorzy:
    Nguyen, L.T.
    Le, V.V.
    Nguyen, B.T.T.
    Ngo, N.X.
    Nguyen, H.T.T.
    Nguyen, Q.D.
    Mulla, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2096987.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cordyceps militaris
    mycelial
    fruiting body
    cordycepin
    Opis:
    Cordyceps militaris, a precious medical mushroom, has attracted wide attention in industrial fields. Currently, the degeneration phenomenon of C. militaris commercial strains is amongst the major challenges for cultivation at the industrial scale. The screening for superior strains with high yield and medicinal value is considered a realistic approach to overcome degeneration problems. In the present study, the mycelial growth, primordia formation, yield performance, and cordycepin content of five strains (DT1, DT2, DT3, DT4, and DT5) under artificial cultivation conditions were investigated. All strains showed mycelial growth on SDAY and liquid medium. The strains were successfully cultivated in brown rice medium and required 18 (strain DT3) to 25 days (strain DT5) to form primordia. Additionally, morphological characteristics of fruiting bodies varied among the strains. Strains DT4 and DT3 exhibited the highest fruiting body length with 74.23 ± 5.13 mm and 72.63 ± 2.62 mm, respectively whereas the highest diameter was recorded for strains DT1 (4.05 ± 0.18 mm) and DT2 (3.63 ± 0.12 mm). Of note, among the investigated strains, strain DT3 exhibited the highest biological efficiency (8.95 ± 0.07%) and cordycepin content (1.68 mg/g). Therefore, strain DT3 could be selected as a potential strain for commercial cultivation.
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 2; 135-145
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation among agro-morphological variation and genetic diversity of rice (Oryza sativa L.) under drought stress
    Autorzy:
    Thu Ha, P.T.
    Khang, D.T.
    Tuyen, P.T.
    Minh, L.T.
    Minh, T.N.
    Thi Lang, N.
    Buu, B.C.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11160.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this study, the correlation coefficients among agro-morphological variation, genetic diversity, and drought tolerance in 44 rice cultivars were analyzed. The drought tolerance at seeding stage (DTS) was significantly proportional to drought tolerance at vegetative stage (DTV) (r = 0.60). In addition, DTS and DTV had strong significant positive correlation to leaf roll (r = 0.87 and 0.54, respectively). Means of unfilled grains and tilling per panicle were proportionally correlated to DTS (r = 0.22 and 0.25, respectively), and DTV (r = 0.20 and 0.36, respectively). However, weight of 1000 grains and filled grains were recorded no correlation to DTS and DTV. At a homologous coefficient of 16.85 integrated from cluster analysis of agro-morphological, quantitative characteristics and drought tolerant scores, the rice cultivars were divided into five groups. Maximum polymorphic information content (PIC) values were detected in three markers including RM11125, RM21, and RM5629, which were from 0.78 to 0.79. Cluster analysis of microsatellite markers revealed that by a genetic distance of 0.63, the rice varieties were separated into three clusters. The results provide valuable information for rice breeders to select donors in breeding rice integrated with drought tolerance and good agronomic characteristics.
    Źródło:
    International Letters of Natural Sciences; 2016, 58
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Involvement of phenolic compounds in anaerobic flooding germination of rice (Oryza sativa L.)
    Autorzy:
    Khang, D.T.
    Ha, P.T.T.
    Lang, N.T.
    Tuyen, P.T.
    Minh, L.T.
    Minh, T.N.
    Bach, D.T.
    Xuan, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11377.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    By this study, thirty rice varieties were evaluated for anaerobic flooding tolerance using the direct sowing method. Phenolic profiles of strong and weak tolerant varieties were identified and compared based on HPLC chromatograms. The germination rates and shoot heights of rice were recorded for calculating the seedling vigor, which indicate the tolerant ability of rice in flooding condition. The results revealed a high variation of germination rate (10.01 to 100%), shoot height (0.35 to 78.17 mm) and seedling vigor (0.05 to 72.83). There was a high correlation between (r = 0.71) germination rate in 5 cm and 10 cm flood. Phenolic and flavonoid contents of the strong tolerant cultivar significantly and proportionally increased in the flooding levels (5 cm and 10 cm). There was a total difference in terms of number of phenolic acids found in the strong and weak tolerant varieties. In particular, six phenolic acids (gallic acid, catechol, caffeic acid, syringic acid, vanillin, and ellagic acid) were only identified with high concentration in the strong tolerant cultivar. The findings suggest that the phenolics presented in the strong tolerant varieties probably have a certain function in response and adaptation to anaerobic flooding condition. Further researches on exogenous application of these phenolic acids to increase the flooding tolerant level of rice should be continued at both green house and field treatments.
    Źródło:
    International Letters of Natural Sciences; 2016, 56
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of salt on growth of rice landraces in Vietnam
    Autorzy:
    Anh, L.H.
    Hue, H.T.
    Quoc, N.K.
    Nghia, L.T.
    Trung, K.H.
    Trung, T.N.
    Trang, D.H.
    Xuan, T.D.
    Khanh, T.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/10833.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2016, 59
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Allelopathic activity of dehulled rice and its allelochemicals on weed germination
    Autorzy:
    Khang, D.T.
    Anh, L.H.
    Thu Ha, P.T.
    Tuyen, P.T.
    Quan, N.V.
    Minh, L.T.
    Quan, N.T.
    Minh, T.N.
    Xuan, T.D.
    Khanh, T.D.
    Trung, K.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this study, the allelopathic potential of dehulled rice, rice, and hulls of rice on germination of weeds was evaluated in laboratory. Phenolic acids in growth media of these plants were also identified and quantified using HPLC. Identified allelochemicals were reversely tested for phytotoxic effects on germination and seedling growth of barnyardgrass, lettuce, radish and rice. The results showed that the inhibitory effects of dehulled rice were stronger than those of hulls and rice. Dehulled rice caused 66.7% and 50.6% reduction in radish root length and lettuce shoot height, respectively. Dehulled rice showed strong inhibitory effects on root length of lettuce and shoot height of radish while hulls and rice exhibited stimulation. Regarding phenolic identification, vanillin and vanillic acid were detected as allelochemicals in root exudates of rice and tested plants. The results revealed that most of the vanillin and vanillic acid treatments showed high inhibitory effects on germination rates and seedling growth of lettuce and radish, high stimulatory activity on root elongation of rice. Vanillic acid (100 ppm and 200 ppm), vanillin (100 ppm) and their mixture (200 ppm) completely inhibited survival of lettuce. The findings indicate the allelopathic potential of dehulled rice which can be used for identification of more phytotoxins to produce bioherbicides in agricultural practices.
    Źródło:
    International Letters of Natural Sciences; 2016, 58
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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