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Wyszukujesz frazę "Silva, V.R." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-11 z 11
    Tytuł:
    Premises of dairy systems development on an example of Polish and Portuguese conditions
    Przesłanki rozwoju systemu mleczarskiego na przykładzie warunków produkcji mleka w Polsce i Portugalii
    Autorzy:
    Fernandes, F.
    Pereira, P.
    Silva, V.R.
    Borowski, P.
    Gaworski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/56207.pdf
    Data publikacji:
    2014
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    dairy system
    production development
    dairy production
    Polska
    Portugal
    country
    farm
    farm condition
    European Union
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Agriculture; 2014, 64 Agric.Forest Eng.
    0208-5712
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Agriculture
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Attachment of 2,2-bipyridine onto a silica gel for application as a sequestering agent for copper, cadmium and lead ions from an aqueous medium
    Autorzy:
    Souza, E. J.
    Cristante, V. M.
    Padilha, P. M.
    Jorge, S. M. A.
    Martines, M. A. U.
    Silva, R. I. V.
    Carmo, D. R.
    Castro, G. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/779827.pdf
    Data publikacji:
    2011
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    2,2-bipirydyna
    żel krzemionkowy
    adsorpcja
    jony metali
    2,2'-bipyridine
    silica gel
    adsorption
    metal ions
    Opis:
    A method was developed to attach 2,2-bipyridine (BP) onto a silica gel surface by a two-step reaction. The fi rst step consisted of a reaction between the matrix and a silylating agent, 3-chloropropyltrimethoxysilane. In the second step of the reaction, a ligand molecule was attached onto Si-CPTS, yielding the product Si-BP. The modified material contained 0.431±0.01 mmol of 2,2-bipyridine per gram of modified silica, as confirmed by FT-IR spectra of the proposed structure. The surface modification was characterized by the BET technique, which revealed a decrease in the surface area from 614 to 450 m2 g-1. The series of adsorption isotherms for the metal ions were adjusted to fit a modified Langmuir equation. The maximum number of moles of copper, cadmium and lead ions adsorbed was 0.64, 0.53, and 0.54 mmol g-1, respectively. The surface saturation was calculated as ¢ fraction and the values obtained, Cu(II) =1.160, Cd(II) = 1.044 and Pb(II) = 0.997, suggest a type 1:1 metal-ligand complex.
    Źródło:
    Polish Journal of Chemical Technology; 2011, 13, 4; 28-33
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First record of mites associated with lima bean (Phaseolus lunatus L.)
    Autorzy:
    Neto, A.V.G.
    Silva, P.R.R.
    Silva, J.D.C.
    Dos Santos, M.F.
    Da Silva Melo, J.W.
    De Franca, S.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084632.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Tetranychidae
    pest mites
    legumes
    Opis:
    Pest mites of the family Tetranychidae are commonly reported in several legumes. However, reports of their occurrence in lima beans are insipient, especially in Brazil. The objective of this research was to record the occurrence of mites in lima bean plants and to describe their damage in this Fabaceae. Tetranychus neocaledonicus André and Mononychellus planki McGregor were found in lima bean plants, Phaseolus lunatus (Fabaceae or Leguminosae). The lima bean plants, when infested by these mites, initially exhibit small whitish spots in the leaflets, which with increasing population density rapidly evolve into chlorotic patches, followed by silvering, and may dry out and fall due to their overfeeding. The extent of the damage caused to lima bean plants and the adaptability of the mite to warm and dry conditions indicate that T. neocaledonicus has greater potential as a lima bean pest than M. planki in northeastern Brazil. This is the first record of these mites associated with P. lunatus.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 3; 418-422
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Serological and molecular evidence of hepadnavirus infection in swine
    Autorzy:
    Vieira, Y.R.
    Silva, M.F.M.
    Santos, D.R.L.
    Vieira, A.A.
    Ciacci-Zanella, J.R.
    Barquero, G.
    do Lago, B.V.
    Gomes, S.A.
    Pinto, M.A.
    de Paula, V.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/989989.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    diagnostic
    hepadnavirus
    swine
    Opis:
    Introduction and objective. Recently, investigations in a swine herd identified evidence of the existence of a novel member of the Hepadnavirus family endemic in swine. The aim of this study was to investigate the serological and molecular markers of Hepadnavirus circulation in Brazilian domestic swine and wild boar herds, and to evaluate the identity with HBV and other Hepadnaviruses reported previously. Materials and methods. For the study, 376 swine were screened for hepatitis B virus serological markers. Analyses were performed in serum samples using commercial enzyme-linked immunosorbent assay (ELISA) kits (DiaSorin®) for anti-HBc, HBsAg and anti-HBs. Reactive and undetermined swine serum samples were selected to perform DNA viral extraction (QIAamp DNA Mini Kit, Qiagen®), partial genome amplification and genome sequencing. Results. From 376 swine samples analysed, 28 (7.45%) were reactive to anti-HBc, 3 (0.80%) to HBsAg and 6 (1.6%) to anti-HBs. Besides, more 17 (4.52%) swine samples analyzed were classified in the grey zone of the EIA test to anti-HBc and 2 (0.53%) to HBsAg. From 49 samples molecularly analyzed after serological trial, 4 samples showed a positive result for the qualitative PCR for Hepadnavirus. Phylogenetic reconstruction using partial genome sequencing (360 bp) of 3 samples showed similarity with HBV with 90.8–96.3% of identity. Conclusions. Serological and molecular data showed evidence of the circulation of a virus similar to hepatitis B virus in swine.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Linear-wavelet networks
    Autorzy:
    Galvao, R. K. H.
    Becerra, V. M.
    Calado, J. M. F.
    Silva, P. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/907399.pdf
    Data publikacji:
    2004
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sieć falkowa
    model nieliniowy
    analiza regresji
    identyfikacja systemu
    wavelet networks
    nonlinear models
    regression analysis
    system identification
    Opis:
    This paper proposes a nonlinear regression structure comprising a wavelet network and a linear term. The introduction of the linear term is aimed at providing a more parsimonious interpolation in high-dimensional spaces when the modelling samples are sparse. A constructive procedure for building such structures, termed linear-wavelet networks, is described. For illustration, the proposed procedure is employed in the framework of dynamic system identification. In an example involving a simulated fermentation process, it is shown that a linear-wavelet network yields a smaller approximation error when compared with a wavelet network with the same number of regressors. The proposed technique is also applied to the identification of a pressure plant from experimental data. In this case, the results show that the introduction of wavelets considerably improves the prediction ability of a linear model. Standard errors on the estimated model coefficients are also calculated to assess the numerical conditioning of the identification process.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2004, 14, 2; 221-232
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    No greens in the forest? Note on the limited consumption of greens in the Amazon
    Autorzy:
    Katz, E.
    Lopez, C.L.
    Fleury, M.
    Miller, R.P.
    Paye, V.
    Dias, T.
    Silva, F.
    Oliveira, Z.
    Moreira, E
    Powiązania:
    https://bibliotekanauki.pl/articles/58954.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2012, 81, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selectivity of nicosulfuron isolated or in tank mixture to glyphosate and sulfonylurea tolerant soybean
    Autorzy:
    Silva, A.F.M.
    Albrecht, A.J.P.
    Damiao, V.W.
    Giraldeli, A.L.
    de Marco, L.R.
    Placido, H.F.
    Albrecht, L.P.
    Filho, R.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/66430.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    selectivity
    nicosulfuron
    tank mixture
    glyphosate
    sulphonylurea
    soybean
    Glycine max
    chlorimuron
    cloransulam
    herbicide
    crop
    tolerance
    sulphometuron
    Opis:
    The aim of the present work was to evaluate the selectivity of nicosulfuron, alone and in combinations, applied in post-emergence (V4) of glyphosate and sulfonylurea tolerant (RR/STS) soybean. The experiments were conducted in 2015/16 and 2016/17, in Piracicaba – state of São Paulo (SP). In 2016/17, the experiment was also conducted in Palotina – state of Paraná (PR). The experiment was a randomized block design, with four repetitions and 16 treatments, with combinations of nicosulfuron, glyphosate, chlorimuron, sulfometuron and cloransulam, applied alone or in tank mixture. Crop injury and variables related to agronomic performance were evaluated. Data were subjected to analysis of variance and treatment means were compared by the Tukey test. The results obtained are significant in the positioning of herbicides in RR/STS soybean, since in the five experiments, all the treatments were selective, except for glyphosate + sulfometuron which reduced the yield of a cultivar (CD 2630 RR/STS) in the 2015/16 season.
    Źródło:
    Journal of Plant Protection Research; 2018, 58, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metric for calculation of system complexity based on its connections
    Autorzy:
    Paiva, J. R. B.
    Gomes, V. M.
    Rodrigues, B. A.
    Silva, L. F. A.
    Aniceto, B. C. M.
    Furriel, G. P.
    Calixto, W. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/136166.pdf
    Data publikacji:
    2017
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    complexity
    connections
    modeling
    simulation
    discrete event systems
    Opis:
    This paper proposes a methodology based on system connections to calculate its complexity. Two study cases are proposed: the dining Chinese philosophers’ problem and the distribution center. Both studies are modeled using the theory of Discrete Event Systems and simulations in different contexts were performed in order to measure their complexities. The obtained results present i) the static complexity as a limiting factor for the dynamic complexity, ii) the lowest cost in terms of complexity for each unit of measure of the system performance and iii) the output sensitivity to the input parameters. The associated complexity and performance measures aggregate knowledge about the system.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2017, 2, 1; 67-73
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Glyphosate in agronomic performance and seed quality of soybean with cp4-EPSPs and cry1Ac genes
    Autorzy:
    Silva, A.F.M.
    Albrecht, A.J.P.
    Albrecht, L.P.
    Pellicci, V.A.
    Giovanelli, B.F.
    Ghirardello, G.A.
    Viana, H.R.M.
    Filho, R.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/66021.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    crop injury
    Glycine max
    soybean
    glyphosate-tolerant soybean
    herbicide
    selectivity
    agronomic performance
    seed quality
    cp4-EPSPs gene
    cry1Ac gene
    Opis:
    The “second generation” of glyphosate-tolerant soybean (GT2 soybean) was developed through a different technique of insertion of the glyphosate-insensitive EPSPs gene, in comparison with “first generation” of glyphosate-tolerant soybean. However, there is not enough information available about glyphosate selectivity in GT2 soybean and the effects on the quality of seeds produced. The aim of this study was to evaluate tolerance to glyphosate and seed quality of soybean cultivar NS 6700 IPRO (GT2) with cp4-EPSPs and cry1Ac genes, after application at post-emergence (V4). The experiment was conducted in a randomized block design with four replicates and seven treatments, or rates of glyphosate (0; 720; 1,440; 2,160; 2,880; 3,600; 4,320 g of acid equivalent − a.e. · ha−1). Assessments were performed for crop injury, SPAD index and variables related to agronomic performance and seed quality. A complementary trial with the same cultivar and treatments in a greenhouse was conducted in a completely randomized design with four replications. Data analysis indicated no significant effect of glyphosate on V4 on agronomic performance and physiological quality of seeds, for two growing seasons. The soybean cultivar NS 6700 IPRO (GT2), with cp4-EPSPs and cry1Ac genes, was tolerant to glyphosate up to the maximum rate applied (4,320 g a.e. · ha−1) at post-emergence (V4). The quality of soybean seeds was not affected by glyphosate up to the maximum rate applied (4,320 g a.e. · ha−1) at post-emergence (V4).
    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:
    Failure control of Plutella xylostella (Lepidoptera: Plutellidae) and selectivity of their natural enemies to different insecticides
    Autorzy:
    Bacci, L.
    Rosado, J.F.
    Picanco, M.C.
    Gonring, A.H.R.
    da Silva Galdino, T.V.
    Martins, J.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/66522.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biological control
    Plutella xylostella
    Lepidoptera
    Plutellidae
    selectivity
    plant pest
    natural enemy
    insecticide
    Brassica
    crop
    cabbage moth
    Opis:
    Control failure of pests and selectivity of insecticides to beneficial arthropods are key data for the implementation of Integrated Pest Management (IPM) programs. Therefore, the aim of this study was to assess the control failure likelihood of Plutella xylostella and the physiological selectivity active ingredients to parasitoid Oomyzus sokolowskii (Hymenoptera: Eulophidae) and to predators Polybia scutellaris (Hymenoptera: Vespidae) and Lasiochilus sp. (Hemiptera: Anthocoridae). In bioassays, P. xylostella larvae and O. sokolowskii, P. scutellaris and Lasiochilus sp. adults were used. Concentration-mortality curves of six insecticides for P. xylostella were established. These curves were used to estimate the mortality of P. xylostella at the recommended concentration, in order to check a control failure of insecticides to this pest. Furthermore, the lethal concentration for 90% of populations (LC90) and the half of LC90 were used in bioassays with the natural enemies to determine the selectivity of these insects to insecticides. All tested insecticides showed control failure to P. xylostella, indicated by high LC90 and low estimated mortalities (less than 80%). The cartap insecticide was selective in half of LC90 to Lasiochilus sp. and moderately selective in LC90 and the half of LC90, to Lasiochilus sp. and P. scutellaris, respectively. Deltamethrin was moderately selective in the half of LC90 to predator Lasiochilus sp. Cartap, carbaryl, and deltamethrin reduced the mortality of Lasiochilus sp. in the half LC90. The results also showed that the insecticides methamidophos, carbaryl, parathion methyl and permethrin were not selective to any of the tested natural enemies. The role of insecticides in IPM systems of Brassica crops is discussed based on their control failures to P. xylostella and selectivity to their natural enemies.
    Źródło:
    Journal of Plant Protection Research; 2018, 58, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal assisted switching magnetic tunnel junctions as FPGA memory elements
    Autorzy:
    Silva, V.
    Fernandes, J. R.
    Oliveira, L. B.
    Neto, H. C.
    Ferreira, R.
    Freitas, S.
    Freitas, P. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/397855.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    MRAM (oporność magnetyczna pamięci o dostępie swobodnym)
    MTJ (magnetyczny tunel połączeń)
    pisanie projektów (programów)
    FIMS (pole indukowane magnetycznym przełącznikiem)
    MRAM (magnetoresistive random access memory)
    MTJ (magnetic tunnel junction)
    writing schemes
    FIMS (field induced magnetic switching)
    TAS (thermal assisted switching)
    STT
    Opis:
    This paper presents our research and development work on new circuits and topologies based on Magnetic RAM for use as configuration memory elements of reconfigurable arrays. MRAM provides non volatility with cell areas and with access speeds comparable to those of SRAM and with lower process complexity than FLASH memories. The new memory cells take advantage of the Thermal Assisted Switching (TAS) writing technique to solve the drawbacks of the more common Field Induced Magnetic Switching writing technique. The CMOS circuit structures to implement the main components for reading and writing the MTJ cells have been developed, characterized and evaluated. A scaled down prototype of a coarse grain reconfigurable array that employs the TAS-MRAM elements as configuration memory has been designed and electrically simulated pre- and post- layout. The results obtained for all the circuit elements, namely the storage cells and the current generators, indicate that the new configuration memory cells can provide a very promising technological solution for run-time reconfigurable hardware devices. The prototype has been manufactured using a standard process 0.35μm 4-Metal CMOS process technology and should be under test in the foreseeable future.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2010, 1, 1; 31-36
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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