Depletion Estimates
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. ProspecÃÃo do estoque de robalo-peva (Centropomus parallelus) no litoral do ParanÃ, atravÃs da pesca esportiva / Prospecting of the stock of bass-peva (Centropomus parallelus) on the Parana coast, through the sport fishing
The snooks are fishes very appreciated food item by fish consumers and recreational fishermen, for they are endowed with a high quality flesh and put up a fierce fight when captured with line-and-hook. Such characteristics make this taxon a target for a host of users, objectives and needs (commercial and recreational fishing) which, together with loss of hab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/01/2008
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2. EXPERIMENTAL STUDY OF THE STRESS INFLUENCE ON PERMEABILITY OF PRODUCING OIL ROCKS / ESTUDO EXPERIMENTAL DA INFLUÊNCIA DE TENSÕES NA PERMEABILIDADE DE ROCHAS PRODUTORAS DE PETRÓLEO
Hydrocarbons reservoirs are dynamic systems that constantly changes during depletion. The production of fluids from a reservoir often reduces pore pressure such that there is an increase in its effective stresses. This may cause compaction which, in turn, may impact matrix permeability. On the other hand, during water injection on reservoirs, the pore pressu
Publicado em: 2005
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3. Ecology of the artisanal fishing in the medium river Tocantins, Imperatriz (MA) / Ecologia da pesca artesanal no médio rio Tocantins, Imperatriz (MA)
Neste trabalho é analisado um levantamento realizado em 1988 para se quantificar a produção pesqueira na região do médio rio Tocantins, a fim de avaliar a importância da atividade pesqueira para as populações locais. Visa compreender a forma de adaptação das técnicas utilizadas pelos pescadores às características ecológicas das espécies alvo d
Publicado em: 1998
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4. Kinetic comparison of seven strains of 2,4-dichlorophenoxyacetic acid-degrading bacteria.
Seven strains of 2,4-dichlorophenoxyacetic acid-degrading bacteria, including Pseudomonas, Alcaligenes, and Bordetella spp., were compared on the basis of growth kinetics. Estimates of maximum growth rate (mu max, k1) and half-saturation growth constant (Ks, k3) were obtained by fitting substrate depletion curves to a four-parameter version of the integrated
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5. Nonlinear estimation of Monod growth kinetic parameters from a single substrate depletion curve.
Monod growth kinetic parameters were estimated by fitting sigmoidal substrate depletion data to the integrated Monod equation, using nonlinear least-squares analysis. When the initial substrate concentration was in the mixed-order region, nonlinear estimation of simulated data sets containing known measurement errors provided accurate estimates of the mu max
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6. Reduced water density at hydrophobic surfaces: Effect of dissolved gases
Here, direct noninvasive neutron reflectivity measurements reveal the presence of a reduced (deuterated) water density region, with a sigmoidal density profile at the hydrophobic silane–water interface that depends on the type and concentration of dissolved gases in the water. Removal of dissolved gases decreases the width of the reduced water density regi
National Academy of Sciences.
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7. Pharmacodynamics of (−)-β-2′,3′-Dideoxy-3′-Thiacytidine in Chronically Virus-Infected Woodchucks Compared to Its Pharmacodynamics in Humans
The pharmacodynamics of (−)-β-2′,3′-dideoxy-3′-thiacytidine (3TC) was studied in chronically woodchuck hepatitis virus-infected woodchucks and compared to that in previous studies in hepatitis B virus (HBV)-infected humans. Net depletion rates of serum virus DNA in woodchucks receiving 3TC were modeled as a sum of an exponentially declining virus in
American Society for Microbiology.
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8. Alternative nonlinear model for estimating second-order rate coefficients for biodegradation.
A modification of the second-order model for biodegradation was derived, applied to an example data set, and shown to be superior for describing the anaerobic biodegradation of p-cresol by an enriched bacterial consortium. The modified model circumvents the no-growth assumption implicit in the use of the second-order rate equation, but still requires the ass
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9. Estimates for the pool size of releasable quanta at a single central synapse and for the time required to refill the pool.
Local superfusion of limited dendritic areas with hypertonic or hyperkalemic solutions stimulates the release of quanta from a small population of synapses made on rodent hippocampal neurons maintained in primary culture, and each quantal event can be detected in the postsynaptic neuron. With maintained stimulation, the initial release rate is about 20 quant
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10. Distribution of renin activity and angiotensinogen in rat brain. Effects of dietary sodium chloride intake on brain renin.
The purpose of this study was to investigate the biochemistry and the regulation of the brain renin-angiotensin system in the Sprague-Dawley rat. Renin activity and angiotensinogen concentrations (direct and indirect radioimmunoassays) were measured in several brain areas and in neuroendocrine glands. Regional renin activities were measured in separate group
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11. Acute Toxicity of Ochratoxins A and B in Chicks 1
Ochratoxins A and B were given to 1-day-old Babcock B-300 cockerels to evaluate acute toxic effects. Two trials with ochratoxin A gave 7-day oral median lethal dose estimates of 116 μg (3.3 mg/kg) and 135 μg (3.9 mg/kg) per chick. Chicks given daily oral doses of 100 μg of ochratoxin A died on the second day. Single subcutaneous doses of 400 μg of ochrat
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12. Ligand-receptor interaction rates in the presence of convective mass transport.
The rate of binding of a ligand to receptors on the cell surface can be diffusion limited. We analyze the kinetics of binding, diffusion-limited in a stationary liquid, in the presence of convective mass transport. We derive a formula that expresses the reaction kinetics in terms of the mass transfer coefficient. A moderately transport-limited kinetics is no