biocidal active products from local petroleum hydrocarbons and coal-tar phenols

egyptian coal-tar phenols were dried, purified by atmospheric distillation, fractionated into 3 fractions at atmospheric pressure, and each fraction was nitrated. the gasoline distillate of 'morgan' crude oil was fractionated into 3 cuts; each cut was treated with concentrated sulfuric acid and the resulting sulfonic acids were neutralize..

soil remaining on fabrics after laundering as evaluated by response surface methodology

response surface methodology was used to visualize the interactive effects of detergent concentration, agitation time, and wash temperature on removal of soil from fabrics. plots of the whiteness index of fabrics after repeated soiling and laundering indicated that maximum whiteness occurred at approximately 0. 20 detergent concentration...

simple and inexpensive laser wavelength calibrating system with a 0. 01-a accuracy over all the visible range

a description is given of a laser wavelength calibration system based on a grating spectroscope used with the method of overlapping orders. illuminated by a neon spectral lamp it gives about 1500 reference lines. a small mirror, put on the grating axis, is lightened by a he-ne laser and gives an angular measurement which helps in the iden..

radiation sterilization of medical products in the philippines

this paper presents the results of a comprehensive investigation of the biological, microbiological, physico-chemical, and dosimetry aspects of using gamma irradiation for the sterilization of locally manufactured medical products and pharamaceuticals. the objective of this study is to determine the technological feasibility of radiation ..

supercritical co//2 extraction of lipid-bearing materials and characterization of the products

in the supercritical co//2 extraction of oil from soybeans, equilibrium solubility and high flow rates are readily achieved in a short-path batch reactor. the same advantages that result from extraction of soybeans also apply to the extraction of oil from cottonseed and corn germ. cottonseed oil obtained by supercritical co//2 extraction ..

aqueous ethanol extraction process for cottonseed oil

a bench-top process for the extraction of cottonseed flakes with aqueous ethanol has been developed. the process consists of cottonseed meat flaking, drying and extraction with boiling, aqueous ethanol (95 by volume) at atmospheric pressure. the resulting miscella is chilled, producing free oil, emulsified oil and mucilaginous gum. the he..

citizen feedback system improves municipal services

lake forest, illinois, has developed a simple and effective service request system that routes citizen service requests in an orderly fashion, improves departmental responsiveness and effectiveness, solicits resident feedback, and can be implemented at minimal cost by any community, large or small. the system provides computerized data fo..

problems and prospects of dryland agriculture in arid semi-arid regions of north-western india

drylands contribute 60 m tons of food grains to india's food basket of 132 m tons. almost all coarse grains and more than 90 of pulses and oilseeds are grown on these lands. in the case of cotton, about 74 of the acreage is rainfed. this paper discusses the problems of drylands, which are much more numerous, more intricate and more varied..

current practices in continuous cottonseed miscella refining

miscella refining of crude cottonseed oil has become a generally accepted commercial process for the past 20 years. the simple and efficient continuous process for removal of undesirable impurities is described, having changed little in its basic form since discovery 40 years ago. the individual unit processes, control systems, process fl..

asbestos substitutes in friction applications

asbestos has been processed into everything from cement pipe to friction products to coatings and compounds. friction products, which account for about 14 of the asbestos fiber consumed in the united states, are used primarily in vehicles. applications include wet and dry brakes and clutches and automatic transmission plates non-asbestos ..