NOPR Collection:

Imperfections inJute Fibre (Corchorus capsularis Linn.)-Morphological Characters

2016-07-20T05:36:14Z

Title: Imperfections inJute Fibre (Corchorus capsularis Linn.)-Morphological Characters Authors: Mitra, Basantika; Bandyopadhyay, S B Abstract: Various imperfections in C. capsularis (white) jute in green, raw retted and mill-processed states, as observed by micro techniques adopted for C. olitorius (tossa) jute [Bandyopadhyay S B & Mitra B, Indian J Text Res, 4 (1979) 77], are reported. The two species have many common features. A few dissimilarities, however, exist in degree. It is suggested that the effect of secondary grouping of cell-bundles in capsularis jute, causing greater meshiness, may be reduced by adopting suitable softening treatment and carding mechanism; the technological status of the fibre may thus be raised above that of olitorius jute. Page(s): 61-68

Physical Characteristics of Wools of Native and Crossbred Sheep

2016-07-20T05:33:58Z

Title: Physical Characteristics of Wools of Native and Crossbred Sheep Authors: Singh, V P; Patni, P C; Mathur, J P; Parthasarathy, S Abstract: The effect of cross-breeding two native breeds of sheep (Malpura and Sonadi) with two exotic breeds (Dorset and Suffolk) on wool quality has been investigated. While improvement in wool quality was achieved in respect of fibre fineness and medullation; there was reduction in staple length. The correlation study revealed a highly significant positive correlation between fibre medullation and diameter, but there was a weak significant positive correlation between fibre diameter and staple length. Page(s): 57-60

Effect of Oxidizing and Reducing Agents on Indian Wools: Part III-Thermal Behaviour

2016-07-20T05:31:53Z

Title: Effect of Oxidizing and Reducing Agents on Indian Wools: Part III-Thermal Behaviour Authors: Sadhir, R K; Bajaj, P; Singh, V P Abstract: The thermal behaviour of natural and chemically modified fibres (treated with thioglycollic acid and hydrogen peroxide) of native exotic and crossbred wool samples was studied in nitrogen at a heating rate of 10ᵒC/min using a thermogravimetric analyzer. The thermograms show three distinct regions of weight loss in all cases. A comparison of the temperatures for different percentage decompositions reveals that the thermal stability decreases significantly after chemical treatment with thioglycollic acid. The effect of chemical treatments on the thermal stability of Chokla wool is not as significant as in the case of Rambouillet and crossbred wools. The thermal stability has also been computed from the primary thermograms by calculating the integral procedural decomposition temperature. The results show the thermal stability to be in the order: Rambouillet > Ramb. × Chokla (50%) canary coloured > Ramb. × Chokla (50%) white > Chokla wool. Page(s): 53-56

Effect of Oxidizing and Reducing Agents on Indian Wools: Part II-Crystalline and Morphological Structures

2016-07-20T05:30:22Z

Title: Effect of Oxidizing and Reducing Agents on Indian Wools: Part II-Crystalline and Morphological Structures Authors: Sadhir, R K; Bajaj, P; Singh, V P Abstract: The X-ray diffraction patterns of natural and chemically modified wools of different varieties have been investigated. With chemical treatment, the degree of orientation decreases, whereas the average crystallite size increases. Scanning electron microscopic studies reveal that at the normal level of treatment there is little damage to the surface topography of wool fibres but at higher levels of treatment the surface is badly damaged. Page(s): 47-52