Results 71 to 80 of about 195,597 (287)

Analgesia de animais de laboratório: responsabilidade dos comitês de ética e obrigação dos pesquisadores

Revista Bioética
Resumo Objetivando avaliar projetos submetidos ao Comitê de Ética no Uso de Animais em relação ao uso de analgesia em cirurgia experimental, este trabalho avaliou 106 projetos, coletando as seguintes informações: metodologia do procedimento cirúrgico ...
Caio Vinicius Botelho Brito, Rosa Helena de Figueiredo Chaves Soares, Nara Macedo Botelho   +2 more
doaj   +1 more source

New Approach Methodologies (NAMs) in Alternative Methods: A Comparative Cytotoxicity Analysis of Nanostructured Hydroxyapatite in Adipose Stem Cells Spheroids

Journal of Applied Toxicology, EarlyView.
ABSTRACT Toxicological assessment is essential in NP approval for health and medical applications. Although 2D cell culture has been widely used, 3D models, especially spheroids, provide better predictive value for toxicological risk assessments since they replicate complex cellular interactions more accurately.
Bianca Montenegro, Rosângela Mayer Gonçalves, Marcelle Gomes Pegurier, Isabelle Amorim, Alexandre Malta Rossi, Leandra Santos Baptista   +5 more
wiley   +1 more source

Estudio sobre la enfermedad de Tyzzer (Clostridium piliforme) en diferentes cepas de ratas y ratones de laboratorio infectadas experimentalmente [PDF]

, 2010
Laboratory animals like alive biological reactive, must be genetically and microbiologically defined in order to obtain reliable results. The use of unhealthy animals in research leads to wrong results. Tyzzer's disease is caused by Clostridium piliforme
Ayala, Miguel, Carbone, Cecilia, Galosi, Cecilia Mónica, Milocco, Silvana   +3 more
core  

Effects of testosterone and high‐dose anabolic steroids on orthodontic‐induced bone remodeling and root resorption: An animal study

Journal of Periodontology, EarlyView.
Abstract Background This study investigates the impact of disruptions in testosterone levels on bone remodeling, root resorption, and periodontal ligament (PDL) during orthodontic tooth movement (OTM) in a pubertal male rat model. Methods Testosterone deficiency was induced through orchiectomy, and the anabolic‐androgenic steroid (AAS, testosterone ...
Caio Luiz Bitencourt Reis, Kelly Galisteu‐Luiz, Gabriela Leite Pedroso, Gustavo Lopes Puls, Leticia Cassaro, Bruno Boaventura Vieira, Fábio Lourenço Romano, Erika Calvano Küchler, Christian Kirschneck, Daniela Silva Barroso de Oliveira, Maria Bernadete Sasso Stuani, Mirian Aiko Nakane Matsumoto   +11 more
wiley   +1 more source

Animales genéticamente modificados, primates no humanos. (La visión europea)

Arbor: Ciencia, Pensamiento y Cultura, 2008
Los ciudadanos europeos creen que se necesita hacer algo más para mejorar el nivel de bienestar/protección de los animales que son utilizados en experimentos.
Carmen Velayos Castelo
doaj   +1 more source

Prevalencia y factores de riesgo para leucosis enzoótica bovina en ganado Blanco Orejinegro (BON) de Colombia, 2018 [PDF]

, 2019
La leucosis es una enfermedad viral que causa pérdidas económicas importantes en la producción bovina, sin embargo, los ganados criollos han sido considerados como más resistentes.
Mejía Cuadros, Katherine
core  

Structural stability of plant–pollinator interactions despite seasonal abundance of long‐tongued hawkmoths

Oikos, EarlyView.
Seasonal environmental cycles affect plant–pollinator interactions by altering plant phenology. Periods of low resource availability can filter pollinators and reduce the complexity of interaction networks, but the extent to which the functional morphology of pollinators influences such filtering remains unclear.
Ugo M. Diniz, Luis M. Primo, Francisco A. R. Santos, Isabel C. Machado   +3 more
wiley   +1 more source

Helminths assemblage in two opossum’s species, Didelphis albiventris and Didelphis aurita (Mammalia: Didelphimorphia), from the Atlantic Forest of Argentina

Parasitology
In the Argentinian Atlantic Forest (AAF) of Misiones, opossums comprise 13% of the wild mammalian diversity. The white-eared opossum, Didelphis albiventris, and the southern black-eared opossum, D.
Bárbara Betina Hartmann, Ezequiel Andres Vanderhoeven, Dante Luis Di Nucci, Agustín Solari, Juliana Notarnicola   +4 more
doaj   +1 more source

Multiple scales of fear: foraging behaviour of white‐naped jays in semiarid landscapes

Oikos, EarlyView.
Animals must constantly balance the need to find resources with the risk of predation. Not only avoiding direct encounters with predators but also assessing the overall risk of their environment using cues, social information or habitat traits at multiple spatial and temporal scales.
Maria Carolina Beiriz, Luiz A. M. Mestre, Lorenzo R. S. Zanette   +2 more
wiley   +1 more source

Marine trophic architecture and hidden ecological connections in the Strait of Magellan: keystone species and ecosystem resilience

Oikos, EarlyView.
Understanding the ecological implications of species coexistence is central to biodiversity studies and to identify environmental and anthropogenic drivers of ecosystem dynamics, where ecological network analysis offers valuable insights. This study examines the complexity, structure, and potential responses to disturbances of the Strait of Magellan's ...
Claudia D. Andrade, Taryn Sepúlveda, Cristóbal Rivera, Cristian Aldea, Tomás I. Marina   +4 more
wiley   +1 more source