منابع مشابه
Spider Silk
Some things about spider silk are difficult to understand.The genetic code for one of the more perplexing types of silk—the strands spiders use to weave their egg cases. Each case must be tough enough to keep out parasites, impermeable to rain and fungus, and breathable while insulating eggs from temperature extremes. These qualities alone would make an impressive fabric.The egg cases may even ...
متن کاملAnalytical markers for silk degradation: comparing historic silk and silk artificially aged in different environments
Suitable analytical markers to assess the degree of degradation of historic silk textiles at molecular and macroscopic levels have been identified and compared with silk textiles aged artificially in different environments, namely (i) ultraviolet (UV) exposure, (ii) thermo-oxidation, (iii) controlled humidity and (iv) pH. The changes at the molecular level in the amino acid composition, the for...
متن کاملJoan Silk
Joan Silk is Professor of Anthropology at the University of California, Los Angeles. She earned her Ph.D. at the University of California, Davis, did postdoctoral research at the University of Chicago, and taught briefly at Emory University before joining the faculty at UCLA in 1986. Her work has mainly focused on the evolutionary basis of behavior in nonhuman primates, with a special emphasis ...
متن کاملSingle Honeybee Silk Protein Mimics Properties of Multi-Protein Silk
Honeybee silk is composed of four fibrous proteins that, unlike other silks, are readily synthesized at full-length and high yield. The four silk genes have been conserved for over 150 million years in all investigated bee, ant and hornet species, implying a distinct functional role for each protein. However, the amino acid composition and molecular architecture of the proteins are similar, sug...
متن کاملProduction of silk sericin/silk fibroin blend nanofibers
Silk sericin (SS)/silk fibroin (SF) blend nanofibers have been produced by electrospinning in a binary SS/SF trifluoroacetic acid (TFA) solution system, which was prepared by mixing 20 wt.% SS TFA solution and 10 wt.% SF TFA solution to give different compositions. The diameters of the SS/SF nanofibers ranged from 33 to 837 nm, and they showed a round cross section. The surface of the SS/SF nan...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1908
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(01)61166-8