Browsing by Author "Almas Anwar"

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    EFFECT OF YARN PARAMETERS ON SHADE VARIATION OF DYED COTTON WOVEN FABRIC
    (UMT.Lahore, 2015) Almas Anwar
    This research work is mainly focused on the effect of different yarn sources and yarn parameters on the vat dyed cotton woven fabric. In this research, plain cotton woven fabric is produced from the weft yarns of different sources with both carded and combed yarns, yarn counts and twist multiplier (T.M). These fabric samples are dyed with vat dye and color values of different fabric samples are measured by using Datacolor SF 600 spectrophotometer. It was found that fabric made from the weft yarn of different sources showed different lightness (L*), chroma (C*) and color strength (K/S) values. The fabric made from the combed weft yarn showed greater lightness (L*) and color strength (K/S) values as compared to carded weft yarn fabric. The woven fabric made from the high twisted weft yarn shows greater lightness (L*) but lower color strength (K/S) values as compared to fabric made from low twisted weft yarn. The woven fabric manufactured from the finer weft yarn shows greater color strength (K/S) but lower lightness (L*) value as compared to the fabric from coarser weft yarn.
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    A mini review on the synthesis of ag-nanoparticles by chemical reduction method and their biomedical applications.
    (NUST Journal of Engineering Sciences, NUST, 2016) Zahra Qurbat; Fraz Ahmad; Mudassar Abbas; Almas Anwar; Muhammad Awais
    This mini-review provides an adequate amount of information about the synthesis of silver nanoparticles through various routes. Among the competitors, Sodium-, borohydride and citrate, water, polyvinyl pyrrolidone and sodium citrate and silver nitrate are the most commonly employed reducing agents, solvent, capping agents and silver salt precursor. The particles thus formed when incorporated to form blended materials can be used in advanced applications, especially in medical devices, preventing the adhesion of microorganisms over them. Herein, the similar function of silver, either distributed over the polymeric material surfaces as a polished layer or equally dispersed therein, will be presented. The marked examples include incorporation of silver nanoparticles into fluff pulp through sonochemical impregnation and blending the silver nanoparticles synthesized through solventfree, greener routes into poly (dicyclopentadiene).