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SUMMARY:Nanostructural ordering of epithelial tissue of silk gland of Anth
 eraea mylitta silkworm
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20260513T160202Z
UID:indico-contribution-1183@indico.inp.nsk.su
DESCRIPTION:Speakers: Alvina Vazina (Institute of theoretical and experime
 ntal biophysics\, RAS)\nX-ray diffraction study of epithelial tissue of si
 lk gland of Indian domestic Antheraea mylitta silkworm was carry out on th
 e small-angle station DIKSI of the Siberia-2 storage ring (NRC “Kurchato
 v institute”\, Moscow). \nThe silk gland is a unique pair organ of inter
 nal secretion in diameter 2 mm and length about 1 metre\, that ten times s
 urpasses the size of the larva of a silkworm. In an active phase of cocoon
 ing all three departments of a glan (anterior\, middle\, and posterior) ar
 e filled by jelly-like substratum from fibroin and sericin proteins which 
 form a silk thread under the influence of mechanical forces (pulling) and 
 specific geometry of keratin segment of gland. Samples of various departme
 nts of a silk gland have been allocated from a larva by soft preparation m
 ethods\, and after that dried up at a room temperature under cargo.  \nX-r
 ay patterns of all departments of a silk gland are characteristic for epit
 helial tissues: in a range of 1-5 nm its show several Debay’ rings with 
 the basic period of identity of 4.72 nm. In our earlier investigations of 
 epithelial tissues of animals and human the series of diffraction Debay’
  reflections at the spacing of 4.65 (± 0.15) nm were attributed to proteo
 glycan structures of extracellular matrix [A.Vazina et al.: NIM (2001) A47
 0\; NIM (2005) A543\; NIM (2009) A603\; Glass Phys. Chem. (2007) 33]. Thus
 \, this periodicity is a nanostructural invariant of proteoglycan structur
 es of epithelial tissues of animals\, human\, and insect also.\n\nhttps://
 indico.inp.nsk.su/event/3/contributions/1183/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1183/
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