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  • 1980-1984  (2)
  • Flame photometric detector  (1)
  • Rubber-tree  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Sensitive flame-photometric-detector analysis of thiodiglycolic acid in urine as a biological monitor of vinyl chloride (1983)
    Springer
    International archives of occupational and environmental health 52 (1983), S. 281-284 
    Details
    ISSN: 1432-1246
    Keywords: Thiodiglycolic acid ; Vinyl chloride ; Flame photometric detector ; Biological monitor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A simple and selective method to detect thiodiglycolic acid (TdGA) in urine by flame-photometric-detector (FPD) of gas chromatograph (GC) is described. The detection limit of this method is less than 1 ng without disturbances. Urine from 64 subjects exposed to different air concentration of vinyl chloride (VCM) from 0.3 ppm to more than 100 ppm in three groups and 78 subjects was detected in this way. A comparison of the results of these groups shows significant differences between the control and two exposed groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00526527
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Recent advances in anther culture of Hevea brasiliensis (Muell.-Arg.) (1982)
    Springer
    Theoretical and applied genetics 62 (1982), S. 103-108 
    Details
    ISSN: 1432-2242
    Keywords: Pollen plants ; Chromosome counts ; Callus formation ; Embryoid formation ; Plant regeneration ; Rubber-tree
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The yield of pollen embryoids from cultured Hevea anthers was increased 4 fold by optimizing the proportion of ammonium nitrate to potassium nitrate in the dedifferentiation medium. For optimal differentiation of pollen embryoids, kinetin, 2,4-D and α-naphtalene acetic acid are required. Anther culture for 50 days on the dedifferentiation medium is a prerequisite for the selective development of calli and embryoids from microspores. The determination of chromosome numbers in embryoids, plantlets and regenerated trees reveals that they originate from (poly)haploid pollen grains (n=2x=18). Aneuploid, triploid (3x=27) and tetraploid (4x=36) cells were encountered in increasing frequencies as the embryoids and plants developed. A few haploid cells with 9 chromosomes were consistently observed. Buds from shoots with mixoploid chromosome numbers can be grafted and the change in the chromosome constitution of the developing new shoots followed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00293340
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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