Products With Antimicrobial Action
Mostrando 25-35 de 35 artigos, teses e dissertações.
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25. Estudo in vitro da atividade antimicrobiana imediata e mediata da clorexidina gel 2% usada como irrigante endodontico contra Enterococcus faecalis
The initiation and perpetuation of pulpal and periapical disease occur due to the presence of bacteria and their degradatory by products in the root canal. The host defense cells are unable to reach bacteria harbored in the root canal system thus, the root canal therapy must be performed combining mechanical procedures and chemical substances. For that reaso
Publicado em: 2002
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26. Antiseptics and Disinfectants: Activity, Action, and Resistance
Antiseptics and disinfectants are extensively used in hospitals and other health care settings for a variety of topical and hard-surface applications. A wide variety of active chemical agents (biocides) are found in these products, many of which have been used for hundreds of years, including alcohols, phenols, iodine, and chlorine. Most of these active agen
American Society for Microbiology.
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27. D-lactic acid production as a monitor of the effectiveness of antimicrobial agents.
Most bacteria at an infection site obtain energy by the breakdown of glucose via microaerophilic or anaerobic pathways and in the process yield various end products. In this study, production of D-lactic acid by Staphylococcus aureus and Escherichia coli was correlated with glucose utilization by bacteria during exposure to antibiotics at subinhibitory, inhi
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28. Transcriptional Profile of the Escherichia coli Response to the Antimicrobial Insect Peptide Cecropin A
Cationic antimicrobial peptides are believed to exert their primary activities on anionic bacterial cell membranes; however, this model does not adequately account for several important structure-activity relationships. These relationships are likely to be influenced by the bacterial response to peptide challenge. In order to characterize the genomic aspect
American Society for Microbiology.
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29. Role of lipids in augmenting the antibacterial activity of benzoyl peroxide against Propionibacterium acnes.
Antimicrobial activity and physicochemical properties of benzoyl peroxide (BP) were investigated to determine the mechanism of action for the compound as an antiacne agent. The MICs and MBCs against nine strains of Propionibacterium acnes ranged between 100 and 800 micrograms/ml in a nutrient broth system, with a median fourfold increase in activity demonstr
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30. Microbial stabilization of antibiotic-containing urine samples by using the FLORA-STAT urine transport system.
The FLORA-STAT Urine Transport System (Wadley Biosciences Corp./Lymphokine Partners Ltd., Dallas, Tex.) was evaluated for its efficacy in maintaining organism count and in effectively blocking the bactericidal action of therapeutic antimicrobial agents in urine samples when the urine samples were held at room temperature. Reconstructions with 53 organism-ant
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31. Antifungal Activities of Antineoplastic Agents: Saccharomyces cerevisiae as a Model System To Study Drug Action
Recent evolutionary studies reveal that microorganisms including yeasts and fungi are more closely related to mammals than was previously appreciated. Possibly as a consequence, many natural-product toxins that have antimicrobial activity are also toxic to mammalian cells. While this makes it difficult to discover antifungal agents without toxic side effects
American Society for Microbiology.
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32. Some chemical and physical properties of nisin, a small-protein antibiotic produced by Lactococcus lactis.
Nisin is a small gene-encoded antimicrobial protein produced by Lactococcus lactis that contains unusual dehydroalanine and dehydrobutyrine residues. The reactivity of these residues toward nucleophiles was explored by reacting nisin with a variety of mercaptans. The kinetics of reaction with 2-mercaptoethane-sulfonate and thioglycolate indicated that the re
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33. Synergistic activity of 5-trifluoromethylthioribose and inhibitors of methionine synthesis against Klebsiella pneumoniae.
5-Methylthioribose (MTR) is an intermediate in the methionine recycling pathway of organisms containing the enzyme MTR kinase. Analogs of MTR have been proposed as a new class of antimicrobial agents because of their ability to perturb the growth of MTR kinase-containing pathogens through inhibition of methionine salvage or by conversion to toxic products. O
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34. Comparative action of glyphosate as a trigger of energy drain in eubacteria.
Escherichia coli, Bacillus subtilis, and Pseudomonas aeruginosa, each possessing a 5-enolpyruvylshikimate 3-phosphate synthase that is sensitive to inhibition by glyphosate [N-(phosphonomethyl)glycine], provide a good cross-section of organisms exemplifying the biochemical diversity of the aromatic pathway targeted by this potent antimicrobial compound. The
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35. Antibacterial activity of Lactobacillus sake isolated from meat.
A total of 221 strains of Lactobacillus isolated from meat and meat products were screened for antagonistic activities under conditions that eliminated the effects of organic acids and hydrogen peroxide. Nineteen strains of Lactobacillus sake, three strains of Lactobacillus plantarum, and one strain of Lactobacillus curvatus were shown to inhibit the growth