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Articles by Khalil Ahmed
Total Records ( 4 ) for Khalil Ahmed
  Shahzada A. Saleem , M. Kaleem Baloch , Khalil Ahmed and Ahmad K. Baloch
  The impact of microwave radiations on length, width, length-width, volume, weight, density and total soluble solids of Dhakki date fruits was investigated. The fruits picked at their mature “Doka” stage, were radiated for 10 to 50 sec using microwaves at three different levels of low (210 W), low medium (360 W), medium (480 W) and medium high (540 W) intensities. Quality parameters such as fruit length, width, weight suffered varying amounts of losses on increasing radiation up to low medium intensity. However, a significant retention in fruit size appeared given higher radiation of medium intensity of 480 W and the fruits exposed for 50 sec at that radiations attained almost original fresh fruit size and appeared attractive for being bigger and smooth in shape, and juicy as compared to the other treated fruits at lower intensities and to the control samples after ripening. The fruits treated at further higher energy of medium high (540 W) levels showed signs of heat roasting with undesirable baked flavour. Never the less microwave radiations of appropriate intensity envisage great potentials in the processing of Dhakki dates.
  Muhammad Ayyaz Khan , Maraj Alam , Khalil Ahmed , Khalil Ahmed , Muddassir Zishan Akhtar and Ejaz Ahmad Khan
  The effect of different materials to control Conyza stricta weed in sugarcane (Co. 1148) crop during 1999-2000 was evaluated. The treatments used were 2,4-D, Gesapex combi, Visa combi, Eucalyptus extract, Hand weeding, and Plastic covering along with control. The statistical analysis of the data showed that maximum Conyza stricta population and plant height was observed in control plots, while the minimum was in hand weeded plots. There was complete eradication of weeds in plastic covered plots. 2,4-D minimized the weed counts m-2 over Gesapex combi and Visa combi and other treatments except plastic covering. Among the herbicidal treatments, 2,4-D gave the lowest plant height. The highest fresh weight and dry weight of Conyza stricta was observed in control plots, while the lowest was in hand weeded plots. The various herbicides reduced sufficiently the fresh weight of Conyza stricta. 2,4-D reduced the dry weight of Conyza stricta than other tested expensive herbicides. It can be concluded that 2,4-D eradicate the broad leaved weeds in sugarcane and was found to be the best among chemicals, while plastic covering gave complete eradication.
  M.N. Islam , Mohammad Ali , M. Kamal Uddin , Khalil Ahmed and A.M. Sarwaruddin Chowdhury
  Fabrics were prepared by plain weaving with the blended yarns made of sulphonated jute fibre in different combination with cotton, rayon, acrylic, polyester and silk waste. It has been observed that the blending of the sulphonated jute fibre with cotton or any other flexible fibre improved the draping properties of the fabrics made there from and that these fabrics in actual use have gracious look and firmness almost to the same extent of those draping properties of the cotton fabrics. The dye ability of this blended fabrics was studied using a basic dye (Rhodamine-B red) and reactive dye (Procion-M red). The dye absorption of jute increases from 68 to 88% as it was sulphonated and the sulphonated jute blended fabrics took up almost the same of amount of dyes which was around 70% from both dye-bath, indicating that the accessibility of blended fabric samples to the dye molecules was practically the same. The colour shades on different fabric sample were almost similar in compare with dyed cotton fabrics. The colour fastness of the blended fabrics were also closed to the cotton fabrics.
  Nurul Islam , Mohammad Ali , M. Kamal Uddin , Khalil Ahmed and A.M. Sarwaruddin Chowdhury
  Modification of jute fibre was due to sulphonation which were improved the physico-chemical and physico-mechanical properties of jute fibre. The change in chemical composition, morphological, geometrical structure, tensile properties and stress-strain characteristics were determined at different degree of sulphonation at optimal reaction conditions. The dimensional structure and mechanical properties of sulphonated jute fiber was studied. In sulphonation no damage and disintegration of the fibre cells were noticed except swelling of the secondary wall only and the fibre tenacity was not impaired. The sulphonation treatment in the optimal condition were improved the fineness in terms of linear density and developed flexibility, softness and compressibility of jute fibre. These values were measured in order to assess the textile importance of sulphonated jute fibre compared to cotton and other textile fibres for fine spinning. The stress-strain properties of the sulphonated fiber were much improved. The breaking extension of jute fibre was increased up to 3% with the degree of sulphonation against the initial value of 1%. The evaluation of these properties was regarded very significant towards improvement of spinnable characters and other textile performances of the sulphonated jute fibre.
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