Las empresas integradoras en México

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Ecological data on road killed Amphisbaena alba linnaeus, 1758 (Squamata, Amphisbaenidae) in southeast Brazil

Vehicles running over vertebrates has been an increasing challenge to the local conservation of some herpetofauna. The Amphisbaenidae are fossorial reptiles which are poorly known ecologically. Biological and natural history data were obtained from three specimens of Amphisbaenia alba that were found dead along 8320 km survey of highways. The rarity of road kill and the importance of the species conservation are discussed.

Las metas del Milenio y la igualdad de género: el caso de la República Bolivariana de Venezuela

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La estrategia de las necesidades básicas como alternativa: sus posibilidades en el contexto latinoamericano

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Instrumentos económicos para la protección ambiental: una alternativa ante los errores de política y las fallas del mercado

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Análise de crescimento e trocas gasosas de erva-cidreira (Lippia alba (Mill.) N.E.Br. ex Britt & Wilson) cultivada em solução nutritiva

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Produção e valor nutricional de híbridos de amoreira (Morus alba L.) colhidos em diferentes idades de crescimento

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estrategia de las necesidades básicas como alternativa: sus posibilidades en el contexto latinoamericano

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Revolução bolivariana e ofensiva socialista na Venezuela

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Épocas de plantio, idades e horários de colheita na produção e qualidade do óleo essencial de Lippia alba (Mill.) N.E. Br., quimiotipo limoneno-carvona

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Produção de folhas, óleo essencial e anatomia foliar quantitativa de Lippia alba (Mill.) N.E.Br. (Verbenaceae) em diferentes níveis de sombreamento e épocas de colheita

Pós-graduação em Agronomia (Horticultura) - FCA

Avaliação nutricional do feno das folhas da amoreira (Morus alba L.) em frangos de corte

The trial was carried to evaluate the nutritional effects of mulberry leaf hay in broiler chickens. Five treatments were used: control (no mulberry, 3.16% CF); 15% mulberry (4.14% CF); 30% mulberry (5.09% CF), no mulberry (4.14% CF); no mulberry (5.09% CF). A randomized blocks design was used, with two blocks and three replications into the blocks to evaluate performance index, histopathological examination of the visceral organs and morphometric measurements of the hepatocyte nucleus and pancreatic acini. A poor performance index was observed for broilers feeding on mulberry leaves; lesions such as steatosis, proliferation of hepatic duct cells and multiple necrosis were found in the livers of the chickens fed with 30% mulberry (5.09% CF), as well as size reduction of the hepatocyte nucleus and pancreatic acini. From these data, it is concluded that mulberry probably has some toxic substance which can interfere in the improvement of diet ingredients, resulting in damage to broiler chickens.

Pinguicula filifolia subsp alba (Lentibulariaceae), a new subspecies with an extremely restricted distribution in Pinar del Rio, Cuba

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Myoglobin from the burrowing reptile Amphisbaena alba: concentrations and functional characteristics

1. 1. Myoglobin from the subterranean reptile Amphisbaena alba was isolated for measurement of concentrations and physico-chemical properties. 2. 2. The concentrations (averaging 12.1 mg.g-1 wet weight in the temporal muscles and 5.8-6.0 in the muscles that motivate the wedge-shaped head which forms the burrowing tool) far exceed those earlier reported for reptiles and other terrestrial vertebrates. 3. 3. The myoglobin has a low O2 affinity compared to mammals (P50 = 2mmHg at 25°C). In the presence of the same myoglobin O2 tension as in mammals this appears to favour similar in vivo O2 saturations at the lower reptilian body temperature. 4. 4. The temperature sensitivity of P50 reflect a heat of oxygenation, ΔH near -13 kcal· mol-1. The myoglobin is monomeric and thus lacks cooperativity in O2 binding and there is no Bohr effect. 5. 5. The pattern of microheterogeneity is similar to that of myoglobin of terrestrial vertebrates but different to aquatic mammals and reptiles. The major and two minor components exhibit very similar O2 affinities. 6. 6. The concentrations and oxygen-binding characteristics of Amphisbaena myoglobin are discussed with regard to the flow of O2 to the mitochondria during digging activity in hypoxic burrow environments. © 1981.