Artigos científicos, teses e dissertações
Publicados nas melhores instituições de ensino

Salmonella is an important pathogen in food microbiology and as well as the other Gram-negative bacteria is naturally resistant to the action of lantibiotics, such as nisin and bovicin HC5. However, the association with the EDTA is successfully employed in the sensitization of Gr...

The action of the anticholinesterase Paraoxon on neuromuscular transmission in rat diaphragm and mouse omohyoideus preparations was investigated. In both preparations, when Paraoxon potentiated the twitch in response to a single nerve stimulus, repetitive muscle action potentials...

Deitz, William H. (Sterling-Winthrop Research Institute, Rensselaer, N.Y.), Thomas M. Cook, and William A. Goss. Mechanism of action of nalidixic acid on Escherichia coli. III. Conditions required for lethality. J. Bacteriol. 91:768–773. 1966.—Nalidixic acid selectively inhibited...

1. The effects of papaverine (10(-5)-2 X 10(-4) M) were studied on the evoked electrical and mechanical activity of the guinea-pig ureter smooth muscle. In normal conditions the action potential consists of an initial spike followed by further spikes superimposed on a plateau pha...

This thesis aims to confront results of an ergonomic action taken by a company to improve working conditions with the perception and proposals of telemarketing operators, following a literature review and a case study. Concepts of Ergonomics and Ergonomic Work Analysis - EWA show...

We find some integrability conditions for low-dimensional manifolds to admit metrics with nonnegative scalar curvature. In particular, we solve the positive action conjecture in general relativity in the affirmative....

There is a pronounced difference between the action of antibiotics and nitrofurans on Euglena gracilis. Those antibiotics that induce hereditary loss of chloroplasts do so only when they affect dividing cells. On the other hand, nitrofurans induce a mass mutation in both dividing...

1. The roles of multiple potassium conductances underlying action potential repolarization and after-hyperpolarization (AHP) in visually identified st. oriens-alveus (st. O-A) inhibitory interneurones of neonatal rat CA1 hippocampal slices were determined using whole-cell patch c...

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PURPOSE(s): This research intends to offer suggestions of application in the current gaps found in the action conditions in each kind of collective action and in each kind of collective right. JUSTIFICATION(s): The subject is relevant because collective actions are part of the de...

N. Saldanha in his paper Stability of compact actions of Rn of codimension one of 1994, considered an action of R(n) on a manifold of dimension n + 1 which is generated by n vector fields X1;...;Xn such that all its orbits are compact. Here he defined two kinds of stability for a...

Biologically produced pyocyanin was purified, and the nature of its antibacterial action was determined for several bacteria. The pigment was shown to be bactericidal for all susceptible organisms. The bactericidal effect was dependent upon pyocyanin concentration and resulted in...

1. Twitch shortening of isolated rat ventricular myocytes was measured on exposure to complete metabolic blockade (2 mM-cyanide in the presence of 10 mM-2-deoxyglucose). Under these conditions twitch shortening declines to undetectable levels over 1-15 min. This 'early' contracti...

An action spectrum for growth delay induced in Escherichia coli B/r by far-ultraviolet radiation (230 to 295 nm) was obtained. It resembles the action spectrum for killing obtained in the same experiments, indicating that the chromophore for growth delay is probably the same as t...

Neely, W. Brock (The Dow Chemical Co., Midland, Mich.). Action of formaldehyde on microorganisms. I. Correlation of activity with formaldehyde metabolism. J. Bacteriol. 85:1028–1031. 1963.—The action of formaldehyde in concentrations sublethal for the culture appeared to be at le...

Bragg, P. D. (University of British Columbia, Vancouver, Canada) and W. J. Polglase. Action of dihydrostreptomycin and antagonism by cations. J. Bacteriol. 85:590–594. 1963.—A number of antibiotics including dihydrostreptomycin inhibited the induction of β-galactosidase in Escher...

Cook, Thomas M., (Sterling-Winthrop Research Institute, Rensselaer, N.Y.), William A. Goss, and William H. Deitz. Mechanism of action of nalidixic acid on Escherichia coli. V. Possible mutagenic effect. J. Bacteriol. 91:780–783. 1966.—With a streptomycin-dependent organism, Esche...

Visible absorption spectra are presented for the Azolla caroliniana Willd.-Anabaena azollae Strass. association and the individual partners. Although absorption by the phycobiliproteins of the endophytic cyanobacterium clearly complements the absorption by the fern pigments, thei...

Abstract The objective of this study was to evaluate the influence of salt concentration on action of natamycin on important microorganisms in food manufacturing as this preservative has been used in immersion baths in several dairy products in the country. Strains of Candida alb...

1. Using laser-scanning confocal microscopy, fast Ca2+ transients were recorded in individual not yet myelinated axons of Purkinje neurones in cerebellar slices from young rats. Axonal Ca2+ transients could be detected during a single action potential and had progressively larger...

Este estudo tem como objetivo final a análise do interesse recursal notadamente sob a ótica do acusado, analisando-se se é possível falar-se em interesse de recorrer da sentença absolutória ou que declara extinta a punibilidade. Para tanto, parte-se de uma análise da origem do pr...