measurement of volumetric and linear shrinkage on black cotton soil

experimental investigations on the shrinkage of expansive black cotton soil have been made to study the process of shrinkage. tests have been conducted on compacted soil specimens with different water contents under controlled conditions of temperature and humidity. the changes that take place in the air and water phases of specimens have..

intercepted photosynthetically active radiation estimated by spectral reflectance

interception of photosynthetically active radiation (par) was evaluated relative to greenness and normalized difference $left bracket$ mss (7 $minus$ 5)/(7 $plus$ 5) $right bracket$ for five planting dates of wheat for 1978-79 and 1979-80 at phoenix, arizona intercepted par was calculated from leaf area index and stage of growth. linear r..

strategies for high-level radioactive waste management: the u s. experience

significant delays in developing commercial reprocessing capacity and permanent waste repositories have given rise to two related policy issues: (1) what to do with the growing inventories of spent fuel, given the uncertainties about when (or even whether) it would prove economic to reprocess it, and (2) what to do about permanent isolati..

surface characterization of intact fibers by inverse gas chromatography

inverse gas chromatography (igc) was used to determine adsorption isotherms and isosteric heats of adsorption for several normal alkanes on a number of intact textile fibers and to determine the specific surface areas of these fibers. surface areas obtained by igc were in excellent agreement (except for cotton) with those calculated from ..

hardboard from retted rice straw and cotton stalks

chemical analysis of rice straw and cotton stalks, after retting for different periods, showed that retting has a negligible effect. however, retted rice straw contains a higher silica and lower lignin content than that of retted cotton stalks. the effect of retting on bending strength, water resistance and thickness swelling of hardboard..

plastic grade cellulose acetate from jute stick

a method for the preparation of plastic grade cellulose acetate from jute stick, a cheap and readily available agro-waste, has been described. the yield is 43. 5 on the dry weight of jute stick. the d. p. of the product is lower and the cost a little higher than the product from cotton linters, but these are comparable with the product fr..

colloque international du cnrs, optogalvanic spectroscopy and its applications

this conference proceedings contains 49 papers, and 1 abstract only. two papers are in french. the subject matter concerns optogalvanic spectroscopy, and its applications. the following topics are addressed: optogalvanic (og) effect in gases and flames, optogalvanic spectroscopy, optogalvanic spectroscopy with atoms, flame research, utili..

proceedings of the seventh asian regional conference on soil mechanics and foundation engineering

this conference proceedings contains 70 papers. sessions consider: arid zones; soil engineering; pavement design/construction; geotechnical aspects; waterfront structures; offshore structures; specialty techniques; and special problems various papers discuss: slope failure mechanism; obstacle sliding; earthquake motion; infiltration capac..

effect of moisture and particle size on the extractability of oils from seeds with supercritical co//2

moisture level and particle size of soybeans, peanuts and cottonseed were correlated with the extraction rate and yield of oil when extracted with supercritical carbon dioxide (sc-co//2) at a constant temperature (50 c) and pressure (8,000 psig). the rate of extraction and ultimate oil yields were quite low with cracked soybeans. however,..

characterization and processing of cottonseed oil obtained by extraction with supercritical carbon dioxide

extraction of flaked cottonseed with supercritical carbon dioxide at temperatures of 50-80 c and pressures of 8,000-15,000 psi yields an improved crude cottonseed oil compared to those obtained by conventional solvent or expeller processes. improvements include lighter initial color, less refining loss and lighter refined bleached colors...