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  • 1
    Electronic Resource
    Electronic Resource
    Adaptive evolution of a duplicated pancreatic ribonuclease gene in a leaf-eating monkey (2002)
    [s.l.] : Nature Publishing Group
    Nature genetics 30 (2002), S. 411-415 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Although the complete genome sequences of over 50 representative species have revealed the many duplicated genes in all three domains of life, the roles of gene duplication in organismal adaptation and biodiversity are poorly understood. In addition, the evolutionary forces behind the functional ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/ng852
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  • 2
    Electronic Resource
    Electronic Resource
    A case for conservation (2004)
    [s.l.] : Nature Publishing Group
    Nature 428 (2004), S. 213-214 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ...China is home to roughly 10% of the world's biodiversity. It has at least 30,000 species of vascular plants and the Fauna Sinica catalogue now stretches to 150 volumes. But this diversity is being destroyed by farming and industrial developments at an alarming rate. Conservation is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/428213a
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular phylogenetics and the origins of placental mammals (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 409 (2001), S. 614-618 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The precise hierarchy of ancient divergence events that led to the present assemblage of modern placental mammals has been an area of controversy among morphologists, palaeontologists and molecular evolutionists. Here we address the potential weaknesses of limited character and taxon sampling ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35054550
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  • 4
    Electronic Resource
    Electronic Resource
    The period Gene: High Conservation of the Region Coding for Thr–Gly Dipeptides in the Drosophila nasuta Species Subgroup (1999)
    Springer
    Journal of molecular evolution 49 (1999), S. 406-410 
    Details
    ISSN: 1432-1432
    Keywords: Key words: Thr–Gly region —period gene —Drosophila nasuta subgroup
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. In this study, the region corresponding to the Thr–Gly region of the period (per) gene in the Drosophila nasuta subgroup of species was sequenced. The results showed that this region was highly conserved in the D. nasuta subgroup. There were only nine variable sites found in this 300-bp-long region, all located in two small regions highly variable among Drosophila species. No length variation was observed either within this subgroup or in the Yunnan (YN) population of D. albomicans. The deduced amino acid sequences were identical for all 14 taxa in the D. nasuta subgroup, and a stretch of alternating Thr–Gly pairs was not observed in this subgroup. A phylogenetic tree was constructed. The clustering of some species was in general agreement with previous works, but it also raised some question on the phylogenetic relationship between the nasuta species. The data did not implicate the Thr–Gly region playing a role in behavioral isolation in this subgroup of Drosophila.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00013157
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  • 5
    Electronic Resource
    Electronic Resource
    Riddle of the giant pandav (1991)
    [s.l.] : Nature Publishing Group
    Nature 352 (1991), S. 573-573 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - The giant panda has been classified either into the Ursidae (bear family) based on comparative anatomical studies1, immunological distances2, DNA hybridization, isozyme elec-trophoresis, immunological and karyolo-gical evidence3, and palaeontological information4, or into the Procyonidae, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/352573a0
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  • 6
    Electronic Resource
    Electronic Resource
    Modification of Coherent Gradient Sensing (CGS) to Accurately Get the Fringe Order (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 171-174 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, a novel optical method, namely, Coherent Gradient Sensing (CGS) is usedto study the fracture properties of IR window materials in the guidance missile. CGS can producehigh contrast fringes and provide some degree of control on the sensitivity of measurement duringexperiment. It is highly attractive for solid mechanics applications, especially to new materials, suchas IR window materials. But the accuracy of the fringe order in the CGS interference image willdeeply influence the precision of experiment. Because of the different optical principle from othermethod, the fringe order of CGS can’t be obtained through the phase-shift technology. To satisfythe precision request of IR window materials, a kind of modified CGS method, loading CGSmethod is introduced and analyzed, which can accurately obtain the fringe order of random positionin the CGS interference image. This method doesn’t need additional optical set-up and complicatedimage processing techniques, but only need two CGS interference images under different loading.Static fracture experiments of ZnS show that this method can evidently improve the precision of theCGS method
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.171.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Evolutionary history of the mtDNA 9-bp deletion in Chinese populations and its relevance to the peopling of east and southeast Asia (2000)
    Springer
    Human genetics 〈Berlin〉 107 (2000), S. 504-512 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. In total, 1218 Chinese from twelve ethnic groups and nine Han geographic groups were screened for the mtDNA 9-bp deletion motif. The frequency of the 9-bp deletion in all samples was 14.7% but ranged from 0% to 32% in the various ethnic groups. Three individuals had a triplication of the 9-bp segment. Phylogenetic and demographic analyses of the mtDNA hypervariable segment 1 (HVS1) sequences suggest that the 9-bp deletion occurred more than once in China. The majority of the Chinese deletion haplotypes (about 90%) have a common origin as a mutational event following an initial expansion of modern humans in eastern Asia. Other deletion haplotypes and the three haplotypes with a 9-bp triplication may have arisen independently in the Chinese, presumably by replication error. HVS1 haplotype analysis suggests two possible migration routes of the 9-bp deletion in east and southeast Asia. Both migrations originated in China with one route leading to the Pacific Islands via Taiwan, the other to southeast Asia and possibly the Nicobar Islands. Along both routes of peopling, a decrease in HVS1 diversity of the mtDNA haplotypes is observed. The "Polynesian motif (16217T/C, 16247A/G, and 16261C/T)" and the 16140T/C, 16266C/A, or C/G polymorphisms appear specific to each migration route.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004390000403
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  • 8
    Electronic Resource
    Electronic Resource
    Genetic Diversity and Divergence in Chinese Yak (Bos grunniens) Populations Inferred from Blood Protein Electrophoresis (1997)
    Springer
    Biochemical genetics 35 (1997), S. 13-16 
    Details
    ISSN: 1573-4927
    Keywords: Chinese yak ; blood protein electrophoresis ; Bos grunniens ; genetic diversity ; genetic divergence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In 6 Chinese yak (Bos. Grunniens) populations including 177 yaks, 34 blood protein loci were studied by horizontal starch gel electrophoresis, four of these loci (AKP, ALB, LDH-1, TF) were found to be polymorphic. The percentage of polymorphic loci(P) is 0.118, the mean individual heterozygosity(H) is 0.015, which means a low level of genetic diversity in the whole Chinese yak population. The coefficient of gene differentiation (G ST ) is 0.0625, which indicated an almost-indistinguishable divergence among different populations at the level of blood protein electrophoresis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022204428553
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  • 9
    Electronic Resource
    Electronic Resource
    NOTE: Blood Protein Polymorphism in B. frontalis, B. grunniens, B. taurus, and B. indicus (2000)
    Springer
    Biochemical genetics 38 (2000), S. 413-416 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026484714939
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  • 10
    Electronic Resource
    Electronic Resource
    Genetic diversity in the Chinese pangolin (Manis pentadactyla): Inferred from restriction enzyme analysis of mitochondrial DNAs (1991)
    Springer
    Biochemical genetics 29 (1991), S. 501-508 
    Details
    ISSN: 1573-4927
    Keywords: Manis pentadactyla ; mitochondrial DNA ; polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Two different forms of Chinese pangolins can be recognized according to the color of their scales, i.e., brown and dusky. We analyzed mitochondrial DNA (mtDNA) purified from the livers of seven dusky and six brown Chinese pangolins from the same locality, using cleavage patterns from 19 restriction enzymes. From the 19 6-bp recognition enzymes used, 51–56 sites were observed. By combining the cleavage patterns for each enzyme, the 13 samples were classified into four restriction types: two in dusky and two in brown Chinese pangolins. The estimated number of nucleotide substitutions per site in dusky and brown types is 0.002, and that between dusky and brown types is 0.012. Divergence between brown and dusky forms began 0.6 Myr ago, provided the mean rate of sequence divergence is 0.02 per Myr in mtDNA. Our results suggest that there is considerable divergence in Chinese pangolins, and brown and dusky Chinese pangolins may be quite different forms or, at least, belong to different maternal groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00554048
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