Studies on lipids of cocoon shell, 1: Hydrocarbons
1998
Iwa, S. (Kyoto Univ. of Industrial Arts and Textile Fibers (Japan))
The chemical structured of hydrocarbons from cocoon shells and their compositions were determined and the reelability of cocoon was investigated in relation with these properties. The silkworm races used in this study were PN showing the highest reelability which was raised in our laboratory and Daizo; a nonreelable race, etc. The cocoons of these races were fractionated into the outer, middle and inner shells and subjected to analyses using IR, GC, GC-MS etc. It was found that there were differences in the hydrocarbon composition among the three shells or the regions of cocoons. Compared with Daizo, PN had a higher proportion of isohydrocarbons of which carbon number were small-even, especially, the content of 3-ethylhexacosane was very high. For Daizo, its content decreased from the outer shell toward the inner one, whereas for PN, 3-ethylhexacosane was more abundant in the middle shell than in the outer one. These results suggest that the presence of isohydrocarbons with a small even number of carbons (ex. 3-ethylhexacosane) might be one of the factors raising the reelability. Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-0962, Japan
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Agriculture, Forestry and Fisheries Research Information Technology Center