Bivoltines silks

Multivoltine (MV, many cohorts raised per year) produce final sUks that do not match with those of bivoltine silks (BV, two cohorts per year) in quality. Crosses between multi- and bivoltine silkworms are not much better than pure MV silks. As BV silks are internationally traded and comparable across regions, we focus our analysis on Indian silk production from bivoltine hybrids capable of producing high-grade raw silk. 

It is a silk produced by the worms which have two generations or broods per year. Bombyx Mori worms have multiple classifications based on their broods, and this life cycle of the worms depends on the region and the climate of the area. Domestic silk worms occur in univoltine, bivoltine and multivoltine breeds, and bivoltine silk worms are reared for the commercial purpose in the regions of China, Korea, japan, and some parts of India. 

In the case of bivoltine Silk, the internal rotation angles (co] of the glycine and alanine residues N-C(=0] bonds are 169.4° and 177.4°, respectively, which are nearly trans conformation. The internal rotation angles cp and tp for the glycine residue are -144.4° and 155.9°, respectively, which are between skew and trans conformations. The internal rotation angles cp and tp for the alanine residue are -158.9° and 151.8°, respectively, which are also between skew and trans conformations. The stereo chemical energy, which is represented by a of bivoltine silk fibre, turns out to be 2.59E + 03, little high as compared to the pure Mysore silk... 

Refined silk fibre Bivoltine silk [Antheraea etal. ... 

Mahesh SS, Somashekar R. Crystal and molecular structures of raw bivoltine silk fibre—a comparative study, Indian J Fibre Textile Res, 32 (2), 143-149,2007. 

Using LALS, we have derived the structure of both domestic and wild silk, the structure of bivoltine and multivoltine silk fibres belonging to Bombyx Mori and the Tassar silk, which is a wild silk with the Chinese origin. Usually, the silks are classified based on... 

Figure 6.1 [From the top clockwise) Background-corrected X-ray diffraction pattern of raw pure Mysore silk fibre, bivoltine...

---