Investigation of Different Washing Effects on Physical and Mechanical Properties of Cotton Knitted Garments

This paper deals with three types of washing (enzyme, softener, Silicone) effects on 100% cotton Single Jersey T-shirt, Slub Single Jersey T-shirt, Double Lacoste (5% Lycra) Polo shirt, Single jersey CVC (T-shirt) and PC single Jersey (T-shirt). Typical industrial washing procedures and techniques were followed and then physico-mechanical properties were analyzed under standard condition. It is observed that after washing, weight of each garments has increased from 5% to 36%;stitch length of the constituted fabric has decreased from 1% to 10% approximately;CPI has increased 23% for CVC fabric only for enzyme treatment and for other process it has a little bit or no wash effects. Same effects found for WPI except 100% cotton and Double Lacoste. Shrinkage property both for lengthwise and widthwise remains the same except CVC and Double Lacoste knitted garments and spirality has almost unchanged except 100% cotton and slub fabric. Both the dry and wet rubbing properties have improved after any types of wash except 100% cotton on Silicone wash. Water absorbency property has increased;pH of all the samples is under controlled and lies between 4.5 and 5.0. But there is no significant change of colorfastness to wash and stain after these washing treatments.

Influenced of Twill Geometry Variation on Woven Fabrics: Analysis of Physico-Chemical Properties

It has been analyzed the properties such as tensile strength, tearing resistance, crease angle recovery, pilling formation, drape co-efficient, colorfastness to rubbing and colorfastness wash by testing with the help of related instrument, The twill woven fabrics which are chosen only different to their weave structure (2/1 S twill and 3/1 S twill) whether the other specification of the fabrics like warp count, weft count, ends per inch, picks per inch, GSM of the fabrics and the fiber quality were same. From the experiment, it was found that some properties such as tensile strength, drape co-efficient and colorfastness of 2/1 twill are better than 3/1 twill on the other hand few properties such as crease angle recovery, tearing resistance and colorfastness to wash of 3/1 twill is better than 2/1 twill. Afterward while performing the job for identifying the pill formation tendency, it was observed that pill formation tendencies of the both fabrics are same.

重组大肠杆菌合成藻青素的适宜底物和需氧量的研究

藻青素(CGP)是一种细菌生物产品,以含有天冬氨酸的一条直链为主干,其上有精氨酸可与其他物质相互联系。CGP在水软化、水凝胶、金属离子螯合和营养品等领域有许多潜在的工业应用。CGP的生产是采用生物株异源表达藻青素合酶(CPH)基因的重组生物体的生物技术。藻类cphA大肠杆菌表达的重组大肠杆菌发酵影响CGP合成参数系统的研究表明,高曝气条件下,400rpm的搅拌速度和在发酵罐(450mL容积)1.0L.min-1的空气流动可使细胞生物量和CGP粗产品的产量高。研究发现,在相似条件下,以甘油为基本材料制作CGP粗产品比以葡萄糖为基本材料高180%。研究发现,以甘油为底物48h连续进行发酵,在37℃时可获得比其他温度兼容性更好、数量更多的CGP粗产品。通过研究甘油浓度对CGP的影响,分析使用甘油的经济成本得出,从基本材料到产品的转换可以增加至少15%的产量。结果显示,可使用生物柴油生产过剩所产出的甘油来作为优化发酵生产CGP的材料。