Results 51 to 60 of about 4,276 (130)

Suplementação de vitamina C associada à densidade de criação no desempenho de frangos de corte Vitamin C supplementation associated to floor space on broiler performance

Scientia Agricola, 1993
Avaliou-se o efeito da suplementação da vitamina C (75 e 150 mg/kg) na alimentação de frangos de corte machos sob condições de estresse de calor e superlotação. As aves foram criadas sobre "cama" de cavaco de madeira nas lotações de 10 e 14 aves/m².
R.D.M. Silva, J.F.M. Menten, M.K. Cardoso, G.G. Ghirardi   +3 more
doaj   +1 more source

Adapting Species Risk Assessments to a Changing Climate: The Underestimated Vulnerability of Foundational Trees

Global Change Biology, Volume 32, Issue 4, April 2026.
Climate change is one of the top threats to biodiversity. However, many species risk assessment frameworks, including the globally authoritative International Union for Conservation of Nature Red List, do not consistently and comprehensively incorporate loss of climatically suitable habitat into listing or threat categorization decisions.
Blair C. McLaughlin, Morgan M. Abbott, Suzanne Lipton, David D. Ackerly, M. Brooke Rose, Holly V. Moeller, Erika S. Zavaleta   +6 more
wiley   +1 more source

UV light pan traps for collecting aquatic insects

EntomoBrasilis, 2012
A simple, inexpensive light trap is described for collecting night-flying insects. The components for constructing the light trap are described and the advantages and disadvantages for collecting different taxa of aquatic insects are discussed. Armadilha
Adolfo Calor, Rodolfo Mariano
doaj   +3 more sources

Análise das Habilidades e Atitudes na Aprendizagem Significativa Crítica de Fenômenos Físicos no Contexto das Séries Iniciais

Ciência & Educação
Resumo: Este trabalho apresenta resultados parciais de uma pesquisa de doutorado em andamento realizada nas séries iniciais cujo propósito é analisar o desempenho dos estudantes quanto às habilidades e atitudes desenvolvidas durante o estudo do conceito ...
Arthur Philipe Cândido Magalhães, Jesus Angel Meneses Villagrá, Ileana María Greca   +2 more
doaj   +1 more source

Breeding in natural nesting sites can improve the resilience of local Lesser Kestrel (Falco naumanni) populations to environmental changes

Ibis, Volume 168, Issue 2, Page 465-478, April 2026.
The identification of key habitats of threatened species and of extrinsic environmental factors that influence their resilience to human‐induced environmental changes are the foundation for the definition of conservation objectives. Using the presence and numerical abundance data collected in a long‐term survey (2000–24) of breeding colonies of Lesser ...
Maurizio Sarà, Rosario Mascara
wiley   +1 more source

Canalized to heat, plastic to cold: adaptive coordination of leaf and seed strategies in populations spanning an elevational gradient

New Phytologist, Volume 250, Issue 2, Page 873-884, April 2026.
Summary In tropical mountains, surviving temperature extremes demands finely tuned strategies. We investigated how populations of the bromeliad Pitcairnia flammea across a 2200 m elevational gradient balance genetic canalization and plasticity, and whether thermal strategies are coordinated between seeds and leaves.
Cleber J. N. Chaves, Danilo U. Tavares, Isabella V. Lemos‐Silva, João P. S. P. Bento, Henrique Vilela‐Bianchini, Paulo Aecyo, Tami C. Cacossi, Marília M. Tavares, Gabriel P. Sabino, Vitor de A. Kamimura, Wagner L. dos Santos, Lucas N. Gonçalves, Karina T. Silva, Juliana L. S. Mayer, Rafael V. Ribeiro, Diego Escobar‐Escobar, Kenneth J. Feeley, Clarisse Palma‐Silva   +17 more
wiley   +1 more source

Climate change and adaptive strategies in Brazil: the economic effects of genetic breeding

Revista de Economia e Sociologia Rural, 2014
Plant breeding through the development of seeds resistant to water stress or high temperature is an important adaptive strategy to cope climate change.
Marcel Viana Pires, Dênis Antônio da Cunha   +1 more
doaj   +1 more source

Temperature Influence of the Molar Excess Volume for Polyalkylene Glycol–Water Lubricants Systems

Chemical Engineering &Technology, Volume 49, Issue 3, March 2026.
Understanding how water alters volumetric behavior in advanced lubricants is essential for future energy systems. This study demonstrates how temperature and pressure govern the molecular interactions in a PAG–water lubricant mixture, explains the transition from compact molecular packing to expansion, and highlights important implications for ...
Matthis Richter, Marco Rüster, Dzmitry H. Zaitsau, Riko Siewert, Ulrike Schümann, Karsten Müller   +5 more
wiley   +1 more source

O projetor de gotas e suas diversas abordagens interdisciplinares no Ensino de Física

Revista Brasileira de Ensino de Física
Neste trabalho é apresentado um experimento didático e de baixo custo, de forma simples e intuitiva, chamado de projetor de gotas. Este experimento pode ser uma alternativa mais eficiente ao uso de microscópios para a observação de microrganismos em sala
Marcel Phillippi Dorta, Edi Carlos Pereira de Sousa, Mikiya Muramatsu   +2 more
doaj   +1 more source

New species and records of Chimarra (Trichoptera, Philopotamidae) from Northeastern Brazil, and an updated key to subgenus Chimarra (Chimarrita)

ZooKeys, 2015
Two new species of Chimarra (Chimarrita) are described and illustrated, Chimarra (Chimarrita) mesodonta sp. n. and Chimarra (Chimarrita) anticheira sp. n.
Albane Vilarino, Adolfo Calor
doaj   +1 more source