HETABHazard Evaluations and Technical Assistance Branch (NIOSH)
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Samples (20-30mg) of colon tissue were frozen in liquid nitrogen, crushed, and freeze-thawed 3x in 0.5% (w/v) hexadecyltrimethylammonium (HETAB, Sigma, St.
If they dispense with Saudi employees at a later stage without genuine reasons, they would fall again into yellow or red categories," said Hetab Al-Anzi, spokesman of the ministry.
Activity of tissue MPO, an enzyme that is found predominantly in the azurophilic granules of polymorphonuclear leukocytes, correlates with the number of polymorphonuclear neutrophils determined histochemically in the inflamed tissues; it is therefore used as an indication of tissue neutrophil accumulation.[sup.13] Testes MPO activity was measured using a procedure similar to that documented previously.[sup.20] Testes samples were homogenized in 50 mM potassium phosphate buffer ([PB], pH 6.0), and centrifuged at 41 400 g (10 minutes); pellets were suspended in 50 mM PB containing 0.5% hexadecyl trimethyl ammonium bromide (HETAB).