G. G. Bhargava , J. S. Negi , S. R. D. Guha

Abstract

The oleo gum resin from Salai (Boswellia serrata) COnsists of 23.5% gum, 55% oil and 55% resin. The gum portion mainly contains D.galactose (46.22%), D-arabinose (11.66%) and 4-D-methyl glucuronic acid alongwith minor quantities of D.mannose and D-xylose in the molecular architect. The gum on methylation and subsequent hydrolysis of methylated product yielded a complex mixture of O-methyl sugars. The main type of linkages in between galactose units were found to be 1→3 and 1→6.

Full Text

     

J. S. Negi , S. R. D. Guha

Abstract

Hibiscus mutabilis was pulped by kraft process. High strength unbleached pulp can be produced from the debarked items in 40-50 per cent yield. Bark also produced pulp of good strength property but the yield was as low as 30%. Experimeat on Natural sulphite pulping process on debarked items produced pulp in 70% yield with light colour. The strength properties of the paper made from this pulp were comparable to kraft compared with normal bamboo kraft paper, except tearing strength all other properties were higher.

Full Text

     

S. R. D. Guha , J. S. Negi

Abstract

no abstract

Full Text