Carbon Turnover
Mostrando 1-12 de 135 artigos, teses e dissertações.
-
1. Anthropogenic impacts on aquatic bacteria: a perspective from the tropics
Resumo O bacterioplâncton compreende um grupo altamente diversificado de microrganismos, que são dominantes nos ecossistemas aquáticos e desempenham um papel central no funcionamento desses ecossistemas e nos ciclos biogeoquímicos. Devido às suas elevadas taxas de dispersão e de mudança na composição, bem como alta adaptabilidade e plasticidade, os
Acta Limnol. Bras.. Publicado em: 14/11/2019
-
2. Timing carbon turnover (δ13C) in weaned piglet’s brain by IRMS
Abstract Isotope-ratio mass spectrometry (IRMS) is a potential tool that provides time-integrated estimate of assimilated and not just ingested nutrients. This feature turned possible its application to evaluate the effects of dietary nucleotides and glutamate on carbon turnover (δ13C) in the brain of weanling piglets. Eighty-seven piglets weaned at 21-day-
An. Acad. Bras. Ciênc.. Publicado em: 26/07/2018
-
3. Composting sewage sludge with green waste from tree pruning
Sewage sludge (SS) has been widely used as organic fertilizer. However, its continuous use can cause imbalances in soil fertility as well as soil-water-plant system contamination. The study aimed to evaluate possible improvements in the chemical and microbiological characteristics of domestic SS, with low heavy metal contents and pathogens, through the compo
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-10
-
4. Ação trófica de aditivos fitogênicos, glutamina e ácido glutâmico sobre a Bursa de Fabrícius e intestino delgado de frangos de corte
Abstract The aim of this study was to evaluate the effect of phytogenic additives and glutamine plus glutamic acid, associated or not, on histomorphometry of bursa of Fabricius and small intestine, oocyst count and lesion scores, and carbon turnover of duodenal mucosa of broiler chickens infected with Eimeria acervulina. A total of 450 male broiler chickens
Pesq. Vet. Bras.. Publicado em: 2015-07
-
5. Estoques de carbono e nitrogênio do solo após 17 anos sob preparo convencional e plantio direto em dois sistemas de rotação de culturas em Cruz Alta, RS.
Descrição e caracterização da área experimental. Amostragem e preparo das amostras de solo. Cálculos do estoque de carbono e nitrogênio no perfil do solo sob os tratamentos. Estimativa da proporção de carbono do solo derivado da vegetação nativa original. Análise estatística. Fertilidade e densidade do solo na área sob vegetação nativa e sob
Seropédica: Embrapa Agrobiologia. Publicado em: 2011
-
6. Secondary production of brnthonic macrofauna in the intertidal zone in the northern segment of Una beach, on the coast of the estate of São Paulo / Produção secundária da macrofauna bentônica da zona entremarés no segmento norte da praia do Una, litoral sul do estado de São Paulo
This study has as objective to estimate the secondary production and turnover rate (P/B) of the gastropod Hastula cinerea, the isopod Excirolana armata and the decapods Austinixa patogoniensis e Callichirus major in the intertidal zone of Una beach, situated in Estação Ecológica Juréia-Itatins, on the southern coast of the state of São Paulo. For that p
Publicado em: 2008
-
7. Studies on carbon-13 turnover in eggs and blood of commercial layers
This paper aimed at evaluating the influence of diets containing different isotopic values of carbon-13 turnover on the half-life of egg (yolk + albumen), yolk and albumen individually, and blood of poultry using delta‰13C isotopic variation. Commercial layers fed four experimental isocaloric and isonitrogenous diets (RC4, RC3, RMC4 and RMC3) containing di
Revista Brasileira de Ciência Avícola. Publicado em: 2006-12
-
8. Oxidation-reduction catalysis with zeolitic metasilicates / Catalise de oxido-redução via metalossilicatos zeoliticos
About forty catalyst materials were prepared among MFI zeolitic chromiumsilicates type and silica grafted by zirconium oxides, and after serve as anchoring cromium species. These materials were named Cr-ZSM-5 and Cr-SSM and were characterized to drive at catalytic process to change carbon monoxide to carbon dioxide. The characterizations involved, Powder X-R
Publicado em: 2005
-
9. Nutrição e ecologia nutricional de cervídeos brasileiros em cativeiro e no Parque Nacional das Emas - Goiás / Nutrition and nutritional ecology of brazilian cervids in captivity and in the Emas National Park - Goias
There are limited data on energy requirements of brazilian cervids. Thus, it is difficult to succeed in their management and reproduction in captivity. Knowing the energy requirements is also important to determine the necessary nutritional resources for their conservation in parks and reserves. The first objective was to study the nutritional requirements o
Publicado em: 2005
-
10. Potential responses of soil organic carbon to global environmental change
Recent improvements in our understanding of the dynamics of soil carbon have shown that 20–40% of the approximately 1,500 Pg of C stored as organic matter in the upper meter of soils has turnover times of centuries or less. This fast-cycling organic matter is largely comprised of undecomposed plant material and hydrolyzable components associated with
The National Academy of Sciences of the USA.
-
11. Effect of Fall Turnover on Terminal Carbon Metabolism in Lake Mendota Sediments
The carbon and electron flow pathways and the bacterial populations responsible for the transformation of H2-CO2, formate, methanol, methylamine, acetate, ethanol, and lactate were examined in eutrophic sediments collected during summer stratification and fall turnover. The rate of methane formation averaged 1,130 μmol of CH4 per liter of sediment per day d
-
12. Intermediary Metabolism of Organic Matter in the Sediments of a Eutrophic Lake †
The rates, products, and controls of the metabolism of fermentation intermediates in the sediments of a eutrophic lake were examined. 14C-fatty acids were directly injected into sediment subcores for turnover rate measurements. The highest rates of acetate turnover were in surface sediments (0- to 2-cm depth). Methane was the dominant product of acetate meta