Results 51 to 60 of about 6,964 (223)

PRODUÇÃO DE BIODIESEL POR ROTA ETÍLICA E METÍLICA A PARTIR DE PLANEJAMENTO FATORIAL

open access: yesRevista Brasileira de Ciências Ambientais, 2020
A análise realizada nesta pesquisa teve como objetivo o desenvolvimento de um processo para a produção de biodiesel em escala de bancada. A reação foi realizada pelo método de transesterificação alcalina, em que os reagentes foram submetidos à ...
Laurênio Ferreira Lopes   +6 more
doaj  

Tamanho ótimo de parcela em milho com comparação de dois métodos Optimum plot size in corn compared with two methods

open access: yesCiência Rural, 2011
O objetivo deste trabalho foi comparar dois m todos de estimação do tamanho ótimo de parcela (Xo) para avaliar 12 caracteres de híbridos simples, triplo e duplo de milho e verificar a variabilidade do Xo entre caracteres e entre híbridos.
Alberto Cargnelutti Filho   +4 more
doaj   +1 more source

When conservation meets contagion: Mapping yellow fever risk to guide vaccination in an endangered primate

open access: yesJournal of Applied Ecology, Volume 63, Issue 6, June 2026.
Spatial projections revealed high‐risk areas for YF transmission, highlighting priority zones for targeted vaccination efforts in GLTs. By integrating disease ecology into conservation planning, this study offers a scalable framework for spatially informed interventions aimed at mitigating disease‐driven declines in threatened species.
Maxime Pierron   +5 more
wiley   +1 more source

Study of the Activity of 3‐benzyl‐5‐(4‐chloro‐arylazo)‐4‐thioxo‐imidazolidin‐2‐one against Schistosomiasis Mansoni in Mice

open access: yesThe Scientific World Journal, Volume 2012, Issue 1, 2012., 2012
Previous studies conducted with the imidazolidinic derivative 3‐benzyl‐5‐(4‐chloro‐arylazo)‐4‐thioxo‐imidazolidin‐2‐one (LPSF‐PT05) show outstanding activity against adult Schistosoma mansoni worms in vitro. In the first phase of this study, S. mansoni‐infected mice were treated, orally, with 100 mg/Kg of the LPSF‐PT05 in three formulations: Tween 80 ...
Andréa Cristina Apolinário da Silva   +11 more
wiley   +1 more source

Joint social‐ecological outcomes of private land conservation: An evidence synthesis with a well‐being perspective

open access: yesPeople and Nature, Volume 8, Issue 5, Page 1066-1084, May 2026.
Abstract Private land conservation (PLC) can contribute to sustainability by improving biodiversity and human well‐being but can also result in negative outcomes for people and nature if poorly designed. Informing PLC design to achieve objectives for joint biodiversity and well‐being is challenging because most evaluations assess ecological and social ...
Erica Cseko Nolasco   +6 more
wiley   +1 more source

Mass spectrometry of some arylidene thioxobenzyl or thioxobiphenyloxoethyl thiazolidinone compounds

open access: yesJournal of Spectroscopy, Volume 18, Issue 4, Page 613-619, 2004., 2004
This paper reports the results of a comparative study of the electron impact mass spectrometry data for a series of previously synthetized 5‐arylidene‐3‐(4‐chloro‐benzyl)‐4‐thioxo‐thiazolidin‐2‐one, and 5‐arylidene‐3‐(2‐biphenyl‐4‐yl‐2‐oxo‐ethyl)‐4‐thioxo‐thiazolidin‐2‐one derivatives.
V. L. M. Guarda   +7 more
wiley   +1 more source

Bootstrap Tests for Nonlinear Simplex Models

open access: yesStat, Volume 15, Issue 1, March 2026.
ABSTRACT We provide important contributions regarding hypothesis tests on the class of nonlinear simplex regression models. The performance of traditional asymptotic tests based on the maximum likelihood estimation (MLE) tends to exhibit considerable size distortions in finite samples.
Patrícia L. Espinheira   +2 more
wiley   +1 more source

Número de repetições para avaliação de caracteres de produção, fenologia e morfologia de cultivares de feijão Number of replications for the evaluation of productive, phenologic and morphologic traits in common bean cultivars

open access: yesCiência Rural, 2010
O objetivo deste trabalho foi determinar o número de medições (repetições), necessário à predição do desempenho de cultivares de feijão (Phaseolus vulgaris L.). Quatorze cultivares foram avaliadas em nove experimentos conduzidos em Santa Maria, Estado do
Alberto Cargnelutti Filho   +1 more
doaj   +1 more source

How Management Practices Shape the “Local Habitat Signature” That Modulates Bird Communities in Urban Green Spaces

open access: yesBiotropica, Volume 58, Issue 1, January 2026.
Local scale factors, not just the broad urban gradient, are the key drivers of urban bird communities. Our multi‐scale study found that specific management practices, such as managing leaf litter depth or the presence of unmanaged tall grass, explained the largest portion of variation in bird composition.
Tulaci Bhakti   +3 more
wiley   +1 more source

Um modelo para o planejamento e a programação da produção em ambientes job shop baseado em redes de Petri [PDF]

open access: yes, 2001
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de ProduçãoUm dos maiores desafios enfrentados pela administração da produção e do qual depende muito a eficiência de todo sistema ...
Chile Palomino, Reynaldo
core  

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