Alpha Toxin
Mostrando 1-12 de 645 artigos, teses e dissertações.
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1. Exposure to 50 Hz electromagnetic field changes the efficiency of the scorpion alpha toxin
AbstractBackground Extremely low-frequency (50 Hz) electromagnetic field (ELF-EMF) is produced by electric power transmission lines and electronic devices of everyday use. Some phenomena are proposed as “first effects” of ELF-EMF: the discrete changes in the membrane potential and the increase of the calcium channel activity as well as the intracellular
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 20/10/2015
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2. BIOSSENSORIAMENTO ESTOCÁSTICO VIA NANOPORO PROTEICO INDIVIDUAL NO DESENVOLVIMENTO DE FERRAMENTAS ANALÍTICAS
Studies employing a single protein nanopore as a molecular recognition element in the development of analytical devices - biosensors, spectrometers, DNA sequencing - have increased considerably in the last decade. Several studies show the potential of these bionanostructures for future stochastic biosensing technology. Stochastic biosensing is an approach
Quím. Nova. Publicado em: 2015-07
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3. Characterization of Clostridium perfringens isolated from mammals and birds from Guwahati city, India
Of the 102 samples collected from mammals and birds, both domestic and captive wild, 48 were found to be positive for Clostridium perfringens. Most of the mammal isolates (84.38%) appeared to have been collected from clinically affected animals, while 33.33% of the bird samples were from clinically affected and 21.43% from apparently healthy birds infected w
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2012
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4. Second record of Tityus bahiensis (Scorpiones, Buthidae) from Venezuela: epidemiological implications
This work reports the second record of the scorpion Tityus bahiensis Perty from Venezuela. The specimen was found alive in a wardrobe at a hotel resort in Margarita Island, northeastern Venezuela. Morphological characterization allowed its assignment to the Tityus bahiensis population inhabiting the southernmost area of the species' geographic range, e.g. th
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2008
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5. Padronização de um teste de potência de toxóide de Clostridium septicum em linhagem contínua de célula
Clostridium septicum is the pathogen that causes the malignat edema. Because of its strong cytotoxic alpha toxin, infections are often lethal. To prevent losses in animal, vaccination with alpha toxóide vaccines is carried out. The potency test of the vaccines have to be done by neutralization test in mice or intradermally into guinea-pig skin. An alternati
Publicado em: 2007
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6. Crotacetin, a novel snake venom C-type lectin, is homolog of convulxin
Snake venom (sv) C-type lectins encompass a group of hemorrhagic toxins, which are able to interfere with hemostasis. They share significant similarity in their primary structures with C-type lectins of other animals, and also present a conserved carbohydrate recognition domain (CRD). A very well studied sv C-type lectin is the heterodimeric toxin, convulxin
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2005-12
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7. Diarréia em leitões lactentes por Clostridium perfringens tipo A em granjas tecnificadas nos estados de Minas Gerais e São Paulo
Diarrhea in suckling piglets caused by Clostridium perfringens type A was diagnosed in industrial (technified) swine farms of the states of Minas Gerais and São Paulo (Brazil), based on isolation and identification of bacterium by biochemical tests, detection of alpha toxin in animal bioassays, and PCR. This seems to be the first report of clostridial enter
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2004-06
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8. Detection of bovine Clostridium perfringens by polymerase chain reaction
A polymerase chain reaction (PCR) assay to detect Clostridium perfringens alpha toxin gene (cpa) was used to identify eighty-nine C. perfringens strains obtained from bovine clinical material. The strains were biochemically characterized as C. perfringens. The isolated strains were cultured on plates containing brain heart infusion agar with 5% sheep blood u
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2004
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9. Detection of alpha, beta and epsilon toxin genes of Clostridium perfringens isolated from cattle?s clinical samples by polimerase chain reaction / Detecção dos genes das toxinas alfa, beta e épsilon de Clostridium perfringens isolados a partir de amostras clínicas de bovinos pela reação em cadeia da polimerase
Clostridium perfringens is an anaerobic micro-organism that is present in the soil and gastrointestinal tract of mammals. It causes food poisoning in humans, enterotoxemic diseases in domestic animals and gas gangrene in both. C. perfringens is classified into five types (A, B, C, D and E) according to the production of four major toxins (alpha, beta, epsilo
Publicado em: 2004
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10. Specific binding of staphylococcal alpha-toxin to isolated rabbit vagus nerves in vitro.
The binding of staphylococcal [125I]alpha-toxin to rabbit vagus nerves in vitro was a saturable process. The radiolabeled alpha-toxin binding was reduced by the coaddition of added navive alpha-toxin, indicating that the binding is specific. Sucrose gradient analysis of detergent-extracted complexes of [125I]alpha-toxin-rabbit vagus nerves showed both high a
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11. Synergistic Effects of Alpha-Toxin and Perfringolysin O in Clostridium perfringens-Mediated Gas Gangrene
To examine the synergistic effects of alpha-toxin and perfringolysin O in clostridial myonecrosis, homologous recombination was used to construct an alpha-toxin deficient derivative of a perfringolysin O mutant of Clostridium perfringens. The subsequent strain was complemented with separate plasmids that carried the alpha-toxin structural gene (plc), the per
American Society for Microbiology.
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12. Bioconversion of possible T-2 toxin precursors by a mutant strain of Fusarium sporotrichioides NRRL 3299.
Liquid cultures of a mutant strain of Fusarium sporotrichioides NRRL 3299 that accumulates trichodiene rather than T-2 toxin converted tricho-9-ene-2 alpha,3 alpha,11 alpha-triol, trichotriol (tricho-10-ene-2 alpha,3 alpha,9 alpha-triol), tricho-10-ene-2 alpha,3 alpha,9 beta-triol, 3 alpha-hydroxytrichothecene, and 3 alpha-acetoxytrichothecene to T-2 toxin.