Immunoanalysis
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Preparo e avaliação de material de referência para análise de Salmonella / Preparation and evaluation of reference material for Salmonella analysis
A utilização de Material de Referência (MR) na análise microbiológica de alimentos aumentou em todo o mundo, principalmente com a implantação de programas de controle e gestão da qualidade em laboratórios. A necessidade de padronização de métodos de análise faz aumentar a demanda por este tipo de material que permite determinar a precisão e rep
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/06/2008
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2. Comparação dos métodos microbiológico convencional, imunoanálise e reação da polimerase em cadeia (PCR) no monitoramento de Salmonella sp. em frangos durante o abate / Comparison of the standard microbiological method, immunoanalysis and polymerase chain reaction (PCR) for monitoring Salmonella sp. in chicken during the slaughter
Foram avaliados neste estudo os métodos convencional, imunoanalítico e por reação de polimerase em cadeia PCR para a pesquisa de Salmonella sp. em, respectivamente, 135, 70 e 90 amostras de carcaças de frangos, distribuídas em cinco diferentes etapas de abate em um abatedouro. Procedeu-se a comparação da freqüência de detecção de Salmonella sp. d
Publicado em: 2006
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3. Identification of cross-reactive antigens between Mycoplasma pulmonis and Mycoplasma arthritidis.
Serological cross-reactivity between Mycoplasma pulmonis and Mycoplasma arthritidis was investigated by enzyme-linked immunosorbent assay, immunoanalysis of electrophoretic blots, and protein A immunoprecipitation reactions. The results demonstrate that one-way cross-reactivity was present in both hyperimmunized and naturally infected rats and that the predo
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4. Tyrosine phosphorylation of a membrane protein from Pseudomonas solanacearum.
We have investigated a tyrosine kinase activity from Pseudomonas solanacearum, an economically important plant pathogen. In vitro incubation of membrane fractions with [gamma-32P]ATP and subsequent sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed an 85-kDa phosphoprotein. Phosphorylation of this protein on tyrosine residues was demonstrated
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5. Purification of 3-hydroxy-3-methylglutaryl-coenzyme A reductase from rat liver.
A procedure for the purification of 3-hydroxy-3-methylglutaryl-coenzyme A reductase [mevalonate: NADP+ oxidoreductase (CoA-acylating); EC 1.1.1.34] solubilized from rat liver microsomes is reported. This enzyme has a specific activity of 9,000-10,000 nmol of mevalonate formed per min/mg of protein. This represents a 4100-fold purification over the activity i
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6. Neurons and microvessels express the brain glucose transporter protein GLUT3.
To elucidate glucose transport mechanisms in brain and to demonstrate the cellular expression of the brain-type glucose transporter (GLUT3), antisera to a synthetic peptide corresponding to the C terminus were prepared and used as probes for this isoform of the facilitative glucose transporter family. Immunocytochemistry of frozen sections of dog and rat bra
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7. Cytolocalization of zeatin O-xylosyltransferase in Phaseolus.
Zeatin O-xylosyltransferase (EC 2.4.2.-) mediates the formation of O-xylosylzeatin from trans-zeatin and UDP-xylose in immature seeds of Phaseolus vulgaris. Tissue printing with a monoclonal antibody specific for the enzyme and a cDNA probe demonstrated that the enzyme was primarily localized and synthesized in the endosperm. Immunolocalization performed on
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8. Quantitative immunoelectrophoretic assay for murine oncornavirus p30: noncovalent facilitation by sodium dodecyl sulfate.
Treatment of Rauscher murine leukemia virus lysates with the anionic detergent sodium dodecyl sulfate (SDS) at concentrations between 0.2 to 2.0% SDS per mg of viral protein greatly increased the anodal electrophoretic mobility of p30, the major internal polypeptide. SDS treatment did not reduce p30 antigenicity or cause nonspecific precipitation of normal s
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9. Bicentric evaluation of Access Toxo immunoglobulin M (IgM) and IgG assays and IMx toxo IgM and IgG assays and comparison with Platelia Toxo IgM and IgG assays.
The recent Access immunoanalysis system (Sanofi Diagnostics Pasteur) for the serological diagnosis of toxoplasmosis was compared with the Abbott Toxo IMx EIA system, taking the Platelia Toxo immunoglobulin G (IgG) and Platelia Toxo IgM systems as references and using as confirmation methods an indirect fluorescence assay or a dye test for IgG and an immunoso
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10. Determination of Infectious Load of Mycoplasma genitalium in Clinical Samples of Human Vaginal Cells
Mycoplasma genitalium is a leading cause of chlamydia-negative, nongonoccocal urethritis and has been directly implicated in numerous other genitourinary as well as extragenitourinary tract pathologies. Detection of M. genitalium has relied almost entirely on PCR amplification of clinical specimens and evidence of seroconversion since these mycoplasmas are h
American Society for Microbiology.
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11. Immunoassays for carbodiimide modified DNA-detection of unpairing transitions in supercoiled ColE1 DNA.
The water soluble reagent N-cyclohexyl-N'-beta-(4-methylmorpholinium) ethyl carbodiimide-p-toluene sulphonate (CMC) can be used to probe for unpaired and mismatched sites in DNA. Polyclonal antibodies for CMC modified DNA were produced in order to develop immunological assays for the localization and quantitation of CMC adducts. Immunoslot blot analysis of m
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12. Crosslinking of proteins to DNA in human nuclei using a 60 femtosecond 266 nm laser.
We developed appropriate conditions to use a laser with 60 femtosecond pulses, a frequency of 1 KHz and a wavelength of 266 nm to efficiently crosslink proteins to DNA in human nuclei for the purpose of using immunoprecipitation to study the binding of specific proteins to specific sequences of DNA under native conditions. Irradiation of nuclei for 30 min wi