effects of ozone on the growth, yield, and partitioning of dry matter in cotton

cotton (gosspium hirsutum l. ) alcala sj-2 was grown in an activated carbon-filtered greenhouse and exposed to biweekly 6-hour ozone fumigations at a concentration of 490 $mu$ g m** $minus$ **3 two ozone treatments were used, differing in age at initial exposure and total ozone dose. sacrificial harvests were taken from all treatments at ..

calorimetric study of polyester/cotton blend fabrics. iii effects of binary retardant systems

the efficiencies of binary flame retardant systems on 50/50 polyester/cotton blend fabric were evaluated with an isoperibol calorimeter. the two binary retardant systems studies were 1) diamonium phosphate (dap) and tris (2,3-dibromopropyl) phosphate (t23p) and, 2) tetrakis (hydroxymethyl) phosphium chloride with urea finish thpc/urea) an..

search for solutions to problems in black cotton soils

the author deals with the problems of black cotton soils from various angles. the studies described were directed to understand the nature and properties of various fractions of black cotton soils from the country, to evaluate the engineering behavior of the black cotton soil deposits with depth under various seasonal conditions, and to d..

hardware for a wide range of digital exchange sizes

the technological environment of the network 2000 concept has been analyzed to derive the requirements for a digital hardware-based switching system that will make maximum use of this environment. the structure of the itt 1240 exchange hardware $em dash$ part of itt system 12 $em dash$ is described to illustrate how it has been designed t..

effect of temperature on mineralisation of nitrogen during aerobic composting

laboratory studies on composting of cotton dust and refuse composting showed that maximum ammonification occurred in the range of 60 $degree$ -70 $degree$ c and maximum nitrification occurred in the range of 30 $degree$ -50 $degree$ c. at temperatures of 60 $degree$ -70 $degree$ c, the rate of nitrification is low. 12 refs

bleaching response of hard wood mechanical pulps

in the reported experiments, the effects of site, tree age, and position within a tree on the unbleached brightness and brightness response of black cottonwood refiner mechanical pulps from four areas of b. c. have been investigated. unbleached pulp brightness was consistently highest for 20-year-old trees and lowest for 80-year-old trees..

matching species to site for increased wood production

more than 500,000 hectares of plantation are being established annually in the southern united states, with 95 devoted to loblolly and slash pines. slash pine is recommended for use on the wet flats and savannahs of the lower coastal plain and in the zone from ocala to the georgia-florida border where loblolly pine is badly infected by fu..

quality planning in one area of the textile industry: what can be produced from a given raw material?

the paper deals with the analysis of the relationships among the properties of cotton fiber, which is cultivated and processed in the greatest volume and that of the semi-finished yarn and final product fabric, produced of the same fibers; displaying the stochastical relationshps among them. this provides an opportunity for the optimal re..

asbestos: some answers

in january 1972 the target health hazard program was initiated by the occupational safety and health administration $left double quote$ to promote the understanding of five hazardous workplace substances, so that more effective control measures might be taken to prevent the occupational diseases or poisoning associated with them $right do..

welded steel for offshore construction

the properties of structural steel plates have been improved in response to north sea requirements but weld metal properties for positional welding are not adequate. this deficiency increases costs. 28 refs