994 resultados para QL Zoología
Resumo:
Mode of access: Internet.
Resumo:
Mode of access: Internet.
Resumo:
Texto a dos col.
Resumo:
Contiene: t. 1: Parte primera, Anatomía y fisiología de los animales ; Parte segunda, Zoología - t. 2: Botánica - t. 3: Mineralogía y geología.
Resumo:
Mode of access: Internet.
Resumo:
Mode of access: Internet.
Resumo:
Los t. IX-XI se publicaron con el tít. : "Cartas físico-matemáticas de Teodosio a Eugenio"
Resumo:
Contiene: T. 1 ( Parte 1ª, Fisiología y Parte 2º, Zoología descriptiva y aplicada)
Resumo:
Mode of access: Internet.
Resumo:
Mode of access: Internet.
Resumo:
Contains bibliographies.
Resumo:
The sliding clamp of the Escherichia coli replisome is now understood to interact with many proteins involved in DNA synthesis and repair. A universal interaction motif is proposed to be one mechanism by which those proteins bind the E. coli sliding clamp, a homodimer of the beta subunit, at a single site on the dimer. The numerous beta(2)-binding proteins have various versions of the consensus interaction motif, including a related hexameric sequence. To determine if the variants of the motif could contribute to the competition of the beta-binding proteins for the beta(2) site, synthetic peptides derived from the putative beta(2)-binding motifs were assessed for their abilities to inhibit protein-beta(2) interactions, to bind directly to beta(2), and to inhibit DNA synthesis in vitro. A hierarchy emerged, which was consistent with sequence similarity to the pentameric consensus motif, QL(S/D)LF, and peptides containing proposed hexameric motifs were shown to have activities comparable to those containing the consensus sequence. The hierarchy of peptide binding may be indicative of a competitive hierarchy for the binding of proteins to beta(2) in various stages or circumstances of DNA replication and repair.
Resumo:
1. Protein utilisation and turnover were measured in male chickens sampled from a line selected for high breast yield and a randombred control line (lines QL and CL, experiment 1) and in male chickens sampled from lines selected for either high or low abdominal fatness (lines FL and LL, experiment 2). In each experiment, 18 birds per line were given iso-energetic (12.9 MJ ME/kg) diets containing either 120 or 220 g CP/kg from 21 to 29 d (experiment 1) and 33 to 43 d (experiment 2). 2. Measurements were made of growth rate, food intake, body composition, excreta production and N-tau-methylhistidine excretion as a measure of myofibrillar protein breakdown, and fractional rates (%/d) of protein deposition, breakdown and synthesis were calculated. 3. In experiment 1, there were no significant differences between the line means for the fractional measures of protein turnover, but there was marked differential response in the two lines in the fractional rates of protein deposition, breakdown and synthesis, to increase in protein intake. The positive slope of the regressions of fractional (%/d) protein deposition and synthesis rates on protein intake (g/d/kg BW) were approximately 1.4- and 2.0-fold higher respectively in the QL than the CL line birds, and the negative slope of the regression of fractional breakdown rate on protein intake was approximately threefold greater in the CL than the QL line birds. 4. In experiment 2, fractional deposition rate was 6.2% lower, but fractional breakdown rate 9.4% higher in the LL than the FL birds, whilst there was essentially no difference in response of the FL and LL birds in the components of protein turnover to increase in protein intake. Line differences in deposition and breakdown rates were thus a reflection of the considerably higher (20%) food and hence protein intake in the FL than the LL birds. 5. The differential line responses in protein turnover in the two experiments suggest that selection for increased breast muscle yield and for reduced body fatness manipulate different physiological pathways in relation to protein turnover, but neither selection strategy results in an improvement in net protein utilisation at typical levels of protein intake by birds on commercial broiler diets, through a reduction in protein breakdown rate.
Resumo:
As a result of their relative concentration towards the respective Atlantic margins, the silicic eruptives of the Parana (Brazil)-Etendeka large igneous province are disproportionately abundant in the Etendeka of Namibia. The NW Etendeka silicic units, dated at similar to132 Ma, occupy the upper stratigraphic levels of the volcanic sequences, restricted to the coastal zone, and comprise three latites and five quartz latites (QL). The large-volume Fria QL is the only low-Ti type. Its trace element and isotopic signatures indicate massive crustal input. The remaining NW Etendeka silicic units are enigmatic high-Ti types, geochemically different from low-Ti types. They exhibit chemical affinities with the temporally overlapping Khumib high-Ti basalt (see Ewart et al. Part 1) and high crystallization temperatures (greater than or equal to980 to 1120degreesC) inferred from augite and pigeonite phenocrysts, both consistent with their evolution from a mafic source. Geochemically, the high-Ti units define three groups, thought genetically related. We test whether these represent independent liquid lines of descent from a common high-Ti mafic parent. Although the recognition of latites reduces the apparent silica gap, difficulty is encountered in fractional crystallization models by the large volumes of two QL units. Numerical modelling does, however, support large-scale open-system fractional crystallization, assimilation of silicic to basaltic materials, and magma mixing, but cannot entirely exclude partial melting processes within the temporally active extensional environment. The fractional crystallization and mixing signatures add to the complexity of these enigmatic and controversial silicic magmas. The existence, however, of temporally and spatially overlapping high-Ti basalts is, in our view, not coincidental and the high-Ti character of the silicic magmas ultimately reflects a mantle signature.
Resumo:
A obesidade é uma doença crônica que vem acometendo, progressivamente, cada vez mais pessoas no mundo. Por ser uma patologia de difícil controle que favorece a eclosão de outros agravos à saúde, é premente a necessidade de realização de pesquisas que possam contribuir para o aperfeiçoamento dos tratamentos, bem como para a melhoria da qualidade de vida e eficácia adaptativa. Sendo assim, a presente pesquisa visou avaliar a percepção da qualidade de vida (QV), a eficácia adaptativa (EDAO) e o funcionamento global (AGF) de pessoas com obesidade, relacionando os resultados obtidos na avaliação da percepção da QV com os da eficácia adaptativa, bem como aos do funcionamento global (AGF). Para tanto, utilizou-se o questionário WHOQOL-100 versão em português para avaliação da percepção de qualidade de vida, a Entrevista Diagnóstica Preventiva Escala Diagnóstica Adaptativa Operacionalizada (EDAO) para a eficácia adaptativa e a Escala de Avaliação do Funcionamento Global (AGF) para o funcionamento global. Este estudo contou com a participação de trinta mulheres obesas (Índice de Massa Corporal IMC >=30 kg/m2), com idade média de 52,33 anos, que utilizavam os serviços de um ambulatório situado na região do Grande ABC, estado de SP. A maioria das participantes se encontrava no grau I de obesidade - 46,70%, situava-se no grau II 33,30% e 20,00% no grau III. O aumento de peso da maioria teve início nas gestações (43,30%), o segundo período onde ocorreu o início do descontrole do peso corporal foi entre os 40 aos 50 anos (20,00%). Na avaliação geral da QV, observou-se que no domínio VI Aspectos Espirituais/Religião/Crenças Pessoais foi encontrado o maior escore médio (16,17 - DP=2,95 [equivalente a 80,83% do escore máximo que poderia ser obtido]), comparando-o com os demais domínios avaliados. Em oposição, o domínio I Físico foi o que apresentou o menor escore médio (11,77 - DP=2,78 - 58,83%). Todas as participantes se encontravam em ineficácia adaptativa: Grupo 2 Ineficaz Leve (26,7%), no Grupo 3 Ineficaz Moderada (33,3%) e no Grupo 4 Ineficaz Severa (30,0%). Quanto à avaliação do funcionamento global (AGF), notou-se que 36,67% se situavam no intervalo entre 51-60 pontos. 23,33% das participantes no intervalo entre 31-50 pontos. Apenas 23,33% tiveram pontuação acima de 70 pontos. Relacionando os resultados das avaliações, foram encontradas correlações fortes, positivas e significativas entre a avaliação da percepção de qualidade de vida, da eficácia adaptativa e do funcionamento Global.