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Biomedical subjects

M Oya

Publications and source records attributed to M Oya.

At least 199 records · Page 11Linked to original sources
PubMed1981

A new enzymatic method for the demonstration of choline in human seminal stains.

A new, simple method for the identification of seminal stains based on the reaction of choline oxidase with choline is presented. The key reaction is the production of hydrogen peroxide by the oxidase action on choline, whereby hydrogen peroxide reacts with N-ethyl-N-(3-methylphenyl)-N'-acetylethylenediamine and 4-aminoantipyrine (ampyrone) in the presence of peroxidase to produce a purple color so that seminal fluid can be identified. Some data are presented on the sensitivity, stability, and specificity of the present method.

Alcohol Oxidoreductases↗
PubMed1980

gamma-Glutamyltransferase test as a new tool for identification of seminal stains.

A simple qualitative method for identification of seminal stains based on a high activity of gamma-glutamyltransferase (gamma-GTP) in human semen is described. It employs the release of alpha-naphthylamine from N-gamma-glutamyl-alpha-naphthylamide by the gamma-GTP action: alpha-naphthylamine couples with Fast Garnet GBC salt to produce a strong brownish-red color. The data on its simplicity, specificity, and stability show that the present method is suitable for medicolegal examination of seminal stains as a preliminary test.

Adolescent↗
PubMed1980

A new enzymatic method for the demonstration of spermine in human seminal stains.

A new, simple method for the identification of seminal stains based on the reaction of bovine plasma amine oxidase (spermine oxidase) with spermine is described. The key reaction is the production of hydrogen peroxide by the oxidase action on spermine; the hydrogen peroxide oxidizes 2',7'-dichlorofluorescin to produce a light green color by which the presence of seminal fluid can be identified. Some data are presented on the stability and specificity of the present method.

Body Fluids↗
PubMed1980

Simultaneous determination of carboxyhemoglobin and methemoglobin in victims of carbon monoxide poisoning.

Concentrations of methemoglobin (Met-Hb) and carboxyhemoglobin (HbCO) were simultaneously determined in blood samples from the victims of city gas poisoning, fires, and exhaust fumes poisoning. All the samples contained concentrations of HbCO, although the concentrations for victims of city gas poisoning were significantly higher than those for victims of fires or exhaust fumes poisoning. Only negligible amounts of Met-Hb were detected in the samples from cases of city gas poisoning, while 4.9 to 31.6% of Met-Hb were found in all but one (1.8%) of the samples of the other two cases. Heat denaturation was considered to be the main cause of Met-Hb production in cases of fires, and inhalation of oxides of nitrogen in cases of exhaust fumes poisoning.

Carbon Monoxide Poisoning↗
PubMed1979

Oxidation of synephrine by type A and type B monoamine oxidase.

Synephrine (SP) was found to be a substrate for monoamine oxidase (MAO) in rat brain mitochondria, showing the Km and Vmax values of 250 microM and 32.6 nmoles/mg of protein/30 min respectively. The inhibition studies showed that the SP oxidation was carried out by both type A and type B MAO and a major part of the activity was due to type A MAO.

Animals↗
PubMed1979

Occurrence of mitochondrial monoamine oxidase in human semen.

Mitochondrial monoamine oxidase (MAO) was found in human semen, showing its Km and Vmax values of 91.7 microM and 290 pmoles/mg of protein/60 min, respectively, with kynuramine as substrate. A major part of the activity was due to type A MAO.

Humans↗
PubMed1979

The LAP test. A new method for identification of seminal stains by a qualitative color reaction of leucine aminopeptidase.

A new simple method for identification of seminal stains is described. It employs a qualitative color reaction based on histochemical technique for demonstration of leucine aminopeptidase (LAP), which is extremely abundant in human semen. The method herein reported (the LAP test) is quite suitable for medicolegal examination of seminal stains as a preliminary test.

Color↗