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Publications (11)12.73 Total impact

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    ABSTRACT: DNA typing of the D1S80 locus was carried out using capillary polyacrylamide gel zone electrophoresis (CZE). The D1S80 allelic ladder was isolated within 40 min in polyacrylamide gel columns of 50 μm inner diameter and 30 cm length. The PCR products and ladder marker in the injection port were electrophoresed and detected by UV absorption (254 nm). The typing was determined according to migration of DNA fragments on the electropherograms, which permits simultaneous analysis of both the test sample polymerase chain reaction products and the ladder marker. The two-step sample injection method applied in this study allows us to use minute amounts of the ladder maker. This procedure provides a reliable, economical and rapid method for D1S80 typing.
    Forensic Science International 01/1997; 87(3):193-199. · 2.31 Impact Factor
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    ABSTRACT: An improved method for DNA polymorphism typing of D1S80 VNTR locus and its application to paternity testing are described. For accurate estimation of the length of polymorphic DNA fragments, the size marker was labeled with fluorescence different from that of PCR primers, and co-electrophoresed as an internal standard. The dualcolour system of fluorescence image analyzer was used to detect the fragments and determine their size. This internal marker method could successfully overcome the problems of band pattern distortion and tailing, besides it allows easy and accurate interpretation of the DNA types. Our results indicate that the internal marker method is much more accurate than the method of using size marker in gel, even with the presence of distortion or tailing of the band patterns. Family studies applying this method showed complete agreement between the observed and predicted types.
    Forensic Science International 01/1997; 83(2):87-94. · 2.31 Impact Factor
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    ABSTRACT: Allele frequency distributions for the D1S80 (MCT118) and HLA DQ loci were determined in a Chinese population sample using the polymerase chain reaction (PCR). A total of 25 alleles and 100 phenotypes were observed for D 1 S80. The frequency of allele 18 was higher than allele 24 only in this Chinese population when compared to other reported populations. A total of 6 alleles and 21 possible phenotypes were observed for HLA DQ. The power of discrimination was 0.97 and 0.93 for D1S80 and HLA DQ, respectively.
    Deutsche Zeitschrift für die Gesamte Gerichtliche Medizin 04/1995; 108(3):170-171. · 2.69 Impact Factor
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    ABSTRACT: Allele frequency distributions for the D1S80 (MCT118) and HLA DQ alpha loci were determined in a Chinese population sample using the polymerase chain reaction (PCR). A total of 25 alleles and 100 phenotypes were observed for D1S80. The frequency of allele 18 was higher than allele 24 only in this Chinese population when compared to other reported populations. A total of 6 alleles and 21 possible phenotypes were observed for HLA DQ alpha. The power of discrimination was 0.97 and 0.93 for D1S80 and HLA DQ alpha, respectively.
    Deutsche Zeitschrift für die Gesamte Gerichtliche Medizin 02/1995; 108(3):170-1. · 2.69 Impact Factor
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    ABSTRACT: We attempted to analyze biological specimens simultaneously for alcohols and hydrogen cyanide. A headspace gas chromatographic method with thick film wide bore column (PEG 20M) for the simultaneous determinations of methanol, ethanol, n-propanol and hydrogen cyanide in blood has been developed. This method was applied for the determinations of methanol, ethanol and hydrogen cyanide in a forensic autopsy case and animal experiments.
    Nihon hōigaku zasshi = The Japanese journal of legal medicine 11/1994; 48(5):336-42.
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    ABSTRACT: Both aconite toxins (aconitine, mesaconitine, and hypaconitine) and a pufferfish toxin (tetrodotoxin, TTX) were detected in the blood of a legal autopsy case. In order to elucidate the in vivo influence of TTX on the toxic effects of aconitine, a mixture of aconitine and TTX was administered to male ICR mice orally or intraperitoneally. The animal experiments revealed that the time of death due to aconitine was significantly delayed in proportion to the dose of TTX compared with the case for aconitine alone, and that the mortality of aconitine was lowered by TTX when the dose ratio of the two toxins was in a particular range. Accordingly, it is thought that the toxic effects of aconitine are attenuated by TTX in vivo.
    The Tohoku Journal of Experimental Medicine 07/1992; 167(2):155-8. · 1.37 Impact Factor
  • S Chiba, S Oshida
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    ABSTRACT: n-Pentane and isopentane have a wide range of use, for example, for cleaning precision machinery, extracting essence and oil, and as liquid fuel for now very popular disposable lighters. They are contained in liquefied petroleum gas and natural gas as trace constituents. In our present experiments, we studied the metabolism and toxicity of these n-pentane and isopentane metabolites. Male mice of ICR strain were exposed to about 5% n-pentane for one hour while the oxygen in the environmental air was maintained at about 20%. Then their blood and liver tissue were collected and analyzed by means of GC and GC-MS. The metabolites thus obtained were 2-pentanol, 3-pentanol and 2-pentanone. The same procedure was repeated with isopentane; 3-methyl-2-butanol, 2-methyl-2-butanol and 3-methyl-2-butanone were detected as the resultant metabolites. In the presence of the NADPH-generating system liver microsomes were made to react to the substrate of saturated n-pentane or isopentane aqueous solution at 37 degrees C for one hour. As a result, the same metabolites were produced as obtained in the exposure experiment. It was therefore suggested that n-pentane and isopentane were metabolized chiefly by liver microsomes. Male mice of ICR strain were fed with 80 mg/kg b.w. of phenobarbital for consecutive four days and exposed to n-pentane or isopentane for one hour. This resulted in an increase in the amount of 2-pentanol and 2-pentanone in the n-pentane inhalation and 2-methyl-2-butanol in the isopentane inhalation experiment. The toxicity of each metabolite was studied on cultured cells. The metabolites were individually mixed with HeLa S3 cell suspension, incubated for three days, and their concentration which inhibited the growth of cells by 50% (IGC 50) were compared. It was demonstrated as a result that the IGC 50 for any of the metabolites was lower than that for methanol, ethanol or acetone used as control.
    Nihon hōigaku zasshi = The Japanese journal of legal medicine 05/1991; 45(2):128-37.
  • Arukōru kenkyū to yakubutsu izon = Japanese journal of alcohol studies & drug dependence 07/1988; 23(2):91-9.
  • Arukōru kenkyū to yakubutsu izon = Japanese journal of alcohol studies & drug dependence 10/1987; 22(3):203-10.
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    ABSTRACT: A study was conducted to establish whether volatile hydrocarbons, such as propane, n-butane and iso-butane, are metabolized in mice or not. In mice having inhaled these gases, isopropanol and acetone were yielded from propane, sec-butanol and methyl ethyl ketone from n-butane, and tert-butanol from iso-butane as the respective metabolites. In addition, liver microsomes were found to contain the enzymic system participating in these metabolisms. In vitro reactions with liver microsomes produced isopropanol from propane, sec-butanol from n-butane, and tert-butanol from iso-butane. It was assumed that hydrocarbons were first converted to (omega-1)-alcohols by microsomal enzyme system and then to corresponding ketones by alcohol dehydrogenase.
    The Journal of Toxicological Sciences 12/1985; 10(4):323-32. · 1.38 Impact Factor
  • Nihon hōigaku zasshi = The Japanese journal of legal medicine 05/1985; 39(2):124-30.