NOPR Collection:

Use of gamma function in the calculation of average fibre length

1989-09-01T00:00:00Z

Title: Use of gamma function in the calculation of average fibre length Authors: Biswas, S K Abstract: The gamma function provides mathematical short-cut for the analysis of fibre length distribution and average length of jute fibres depending on the sampling and testing methods. Page(s): 145-146

Stress-strain characteristics of rabbit hair

1989-09-01T00:00:00Z

Title: Stress-strain characteristics of rabbit hair Authors: Gupta, N P; Bapna, D L; Patni, P C; Mathur, J P Abstract: The stress-strain characteristics and dependence of curve parameters on tex of rabbit hairs obtained from six genetic groups, viz. German, British, Russian, German × British, German × Russian and German × British × Russian angora rabbit, are reported. The results do not differ much for the variance analysis of unadjusted means except in the case of post yield slope (PY), breaking load (BL) and stress at 30% extension (F₃₀). The adjusted means of PY with respect to tex do not differ significantly whereas the differences between groups are observed in the case of BL and F₃₀ Based on the homogeneity tests, common regression coefficients of curve parameters on tex are obtained in the case of PY, BL, tenacity at break and extension at break. Page(s): 141-144

Effect of sunlight on cotton fabric in presence of perspiration

1989-09-01T00:00:00Z

Title: Effect of sunlight on cotton fabric in presence of perspiration Authors: Bhat, N V; Benjamin, Y N; Buch, V H; Wani, S N; Dharmadhikari, A R Abstract: The degradative effect of sunlight on cotton fabric in presence of artificial perspiration has been evaluated by strength loss studies, scanning electron microscopy and X-ray diffraction. Significant loss in the tensile strength and development of cracks and fibrillation were observed in fibrics exposed in presence of perspiration. Page(s): 138-140

Synthesis of 10-piperidino/morpholino-9-(β-hetarylethylene) anthracenes and their application on polyester fibres as disperse dyes

1989-09-01T00:00:00Z

Title: Synthesis of 10-piperidino/morpholino-9-(β-hetarylethylene) anthracenes and their application on polyester fibres as disperse dyes Authors: Rangnekar, D W; Rajadhyaksha, D D Abstract: 10-Chloroantitracene-9-aldehyde, obtained by the treatment of N,N-dimethylformamide and phosphorus oxychloride on anthrone, was reacted with piperidine and morpholine to get 10-piperidino- and 10-morpholino-anthracene-9-aldehydesrespectively. Condensation of these compounds with 2-methylbenzoxazole, 2-methylbeozimidazole and 2-cyanomethylbeozimidazole yielded the corresponding 10-piperidino- and 10-morpholino-9-(β-hetarlethylene)anthracenes. These brilliant yellow fluorescent compounds were applied on polyester as disperse dyes which resulted bright yellow shades with green fluorescence with moderate to good light fastness and good sublimation fastness. Page(s): 135-137