sem studies of the fracture morphology of single cotton fibers

in the reported experimental study, the fractured ends of single cotton fibers ruptured as a result of tensile strain, as well as cyclic bending fatigue, were examined in the scanning electron microscope. interesting differences in fracture patterns were observed for fibers broken by the two methods. the study includes raw cotton as well ..

effects of weathering and atmospheric pollutants on cotton fabric and cotton fabric treated with selected flame retardants $em dash$ 1. physical, chemical, and flammability properties

in the reported experiments, the effects of weathering and atmospheric pollutants on the physical, chemical, and flammability properties of cotton fabirc treated with pyrovatex 3805 and with thpoh-nh//3 flame retardant finishes and untreated controls were determined. the fabrics were exposed to so//2, no//2, and ozone singly and in combin..

effect of short thermal treatment on cotton degradation

in the reported experiments, cotton fabric was subjected to thermal treatment for durations ranging from 0. 5 to 5 min at a temperature range of 160 $degree$ to 220 $degree$ c. in comparison with untreated cotton, the copper number decreased after heating cotton for up to 3 min at 160 $degree$ , 180 $degree$ , and 190 $degree$ c but incre..

manchester revisited: how much energy is saved?

the norris cotton federal building in manchester, n. h. is a general services administration demonstration project. from the time planning started on the project in 1972, the thinking was to design the office structure to be a working functional building that also would serve as an energy conservation laboratory. the building has been bui..

sem study of abrasion damage to cotton fibers

in the reported experiments, resin-finished cotton fabrics and their controls were subjected to accelerated laboratory abrasion on the accelerotor, the stoll flex quartermaster universal wear tester, and the wash wheel. dry and wet abrasion were tested. similar fabrics from actual garments put through normal wear trials were also investig..

energy requirements for irrigated crop production

the energy requirements for the production of irrigated crops in the southwestern u. s. are presented and discussed. energy requirements for tilling, planting, fertilization, cultivation, pest control and harvesting are presented for cotton, alfalfa, lettuce and barley. the irrigation energy requirement is given for both surface and groun..

agriparticulate reference materials: theory of the in situ native standard method to verify particulate burden in cotton

a fundamental approach is presented to verify the total particulate burden in cotton reference material. the method is founded on a null hypothesis. cotton is mechanically cleaned by cycling through a mechanical cleaner. particulates recoverable from cleaning are added back to the cleaned lint, and the ith property is measured to facilita..

contribution of humidification and cooling systems to cotton dust levels in a textile mill

in the reported experiments, a weave room with approximately 1000 operating looms was selected for a study of the contribution of dissolved solids from air-washer water and atomizer water to cotton dust levels. in a plant trial, air-washer water solids were found to contribute less than 1 $mu$ g/m**3 for each of 100 mg/l. of dissolved sol..

residual shear strength of tropical soils

the paper presents the results of investigations on residual shear strength of tropical soils as conducted using the ring shear apparatus. residual shear strength values of eleven tropical soils have been obtained. bentonite and black cotton soils exhibit angles of residual strength of about 8. 5 $degree$ and 11 $degree$ ; brittleness ind..

fungal degradation of cotton materials under outdoor weathering and in soil burial conditions

the degradation of five types of cotton fabric and three types of cotton yarn and threads was studied during outdoor monsoon exposure, tropic room exposure and soil buried conditions. the susceptibility of different cotton materials was due to micronaire characteristics of the fibers and varying fungal activity. highly twisted and merceri..