NOPR Collection:

Amylase from Bacillus subtilis-159 for Desizing

Wed, 01 Mar 1978 00:00:00 GMT

Title: Amylase from Bacillus subtilis-159 for Desizing Authors: Gayal, S. G.; Khandeparkar, V. G. Abstract: The performance of the amylase produced by the culture Bacillus subtilis-159 as a desizing agent has been compared with that of three commercially available amylases. The enzyme is stable and active at 60°C. It can remove 94% size with enzyme strength of 700 units/100 ml This isolate could, therefore, be exploited for the production of amylase. Page(s): 27-28

A Comparative Study of the Equalizing Power of Jute Breaker Cards of Different Makes

Wed, 01 Mar 1978 00:00:00 GMT

Title: A Comparative Study of the Equalizing Power of Jute Breaker Cards of Different Makes Authors: Debnath, N. C.; Gupta, P. Sen Abstract: The transfer function of jute card has been derived under certain assumptions and then utilized to determine experimentally the quantity β, a function of various machine parameters. β has been made use of for developing an expression for comparing the equalizing powers of jute cards of different makes. Giddings and Lewis-Fraser's type JF₂, 3-pair breaker card has been found to have superior equalizing power compared to J.F. Low's type M, 2-pair breaker card*. Page(s): 23-26

Mechanics of Latent Crimp in False Twist Textured Yarn

Wed, 01 Mar 1978 00:00:00 GMT

Title: Mechanics of Latent Crimp in False Twist Textured Yarn Authors: Gupta, V B; Mital, R K Abstract: The factors contributing to temporary set in textured polyethylene Terephthalate yarn, rendering the crimp latent, are discussed. It is postulated that temporary set can be attributed to internal structural factors and interfilament contact forces. Page(s): 18-22

Structural Dependence of Young's Modulus of Polyethylene Filaments

Wed, 01 Mar 1978 00:00:00 GMT

Title: Structural Dependence of Young's Modulus of Polyethylene Filaments Authors: Gupta, V B; Ray, N D; Khanna, P N; Somashekar, T H Abstract: High density polyethylene filaments having different degrees of orientation and structures were prepared by heat-setting cold-drawn (drawn at 80°C) filaments. On the basis of the results of structural and mechanical studies conducted on these filaments, an attempt bas been made to correlate the measured values of the Young's moduli with structural parameters. It has been found that using a simplified one-phase model, the Young's modulus of the cold-drawn filaments can be related approximately to molecular and to a reasonable extent to crystallite orientation. Young's moduli of the filaments heat-set subsequent to cold-drawing do not show such a correlation. The possible reasons for these differences are discussed. Page(s): 12-17