Fragmentation of cotton bract and a technique for detecting bract in cotton dust.
Agron J 1978 Jul-Aug; 70(4):644-648
Structural and friability changes occurring in cotton bract during postanthesis development were investigated and a fluorescent dyeing technique for following the micronization of cotton bract was developed. Observation of tissue sections prepared from bracts showed that the change in friability was associated with an increased number of lignified bundle sheath parenchyma cells and tracheary elements in bract veins. Other anatomical changes accompanying bract senescence included significant decreases in epidermal, mesophyll, and lamina thickness at or shortly after the time of capsule dehiscence. Dyed plant trash was distinguished from undyed trash particles of the same size by observation with an epifluorescence microscope. The authors conclude that this tracer technique can be used to establish what proportion of respirable dust emitted in the textile mill is directly attributable to the cotton bract.
NIOSH-Publication; NIOSH-Grant; Control-technology; Air-sampling-equipment; Particulate-dust; Particulate-sampling; Pulverization; Analytical-methods; Airway-response-disorders; Respiratory-system-disorders; Textile-industry; Cotton-mill-workers; Cotton-dust; Cotton-ginning
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