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  • 1
    ISSN: 0032-8332
    Keywords: China ; Gibbon ; Species ; Subspecies ; Taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gibbons are small and arboreal apes restricted to southeastern tropical and southern subtropical regions in Asia. They are distributed from Assam in the northwest, eastward to south China and Vietnam, south through the Malay Peninsula to Sumatra, Borneo, Java, and the Mentawai Islands. Twenty-two genetically distinct populations of gibbons are generally recognized. Gibbons were once widely distributed in China; however, they are now primarily restricted to southern and southwestern Yunnan and Hainan Island. Their widest distribution and greatest species diversity is in Yunnan Province. Gibbons are rare in China and are now listed as a first class endangered species. Four gibbon species inhabit Yunnan Province in southern China. They areH. hoolock, H. lar, H. leucogenys, andH. concolor. There are three subspecies ofH. leucogenys: H. l. leucogenys, H. l. siki, andH. l. gabriellae. OnlyH. l. leucogenys inhabits China. Four subspecies ofH. concolor inhabit China. These areH. c. concolor, H. c. jingdongensis, H. c. furvogaster, andH. c. hainanus. The first three subspecies inhabit Yunnan andH. c. hainanus is found only on Hainan Island.H. lar yunnanensis is the subspecies ofH. lar in southern China.H. hoolock leucogenys is the subspecies ofH. hoolock in southern China.H. concolor jingdongensis, H. concolor furvogaster, andH. lar yunnanensis are all newly proposed subspecies byMa andWang (1986). The data on southern China gibbons presented here is based on an analysis of the skeletons and skins of 49 specimens held at the Kunming Institute of Zoology, Kunming, Yunnan.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-5176
    Keywords: agarose ; Gracilaria ; algae ; polysaccharide ; 13C-NMR ; agar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of nitrogen availability on the chemical structure of agar polymers isolated fromGracilaria verrucosa strain G-16 was ascertained by sequential solvent extraction and carbon 13 nuclear magnetic resonance (13C NMR) spectroscopy. Agar isolated fromG. verrucosa strain G-16 cultured under nitrogen limited conditions showed large non-polar components but produced spectra indicative of only minor amounts of methylation. These agars also produced spectra suggesting the presence of floridean starch. The nitrogen supplemented cultures ofG. verrucosa strain G-16 produced agars of a more polar nature (hot-water soluble) and contained little detectable starch. The data suggest that the higher gelling temperatures of agar from nitrogen limited plants is not due to markedly higher methylation. These data also suggest that nitrogen effects on agar content may not be as significant as previously thought.
    Type of Medium: Electronic Resource
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