a catalytic-kinetic method for the determination of selenium is proposed. alizarin navy blue is reduced by sodium sulfide to from a colorless product. the reaction is accelerated by trace amounts of se (iv), and can be followed by measuring the decrease in absorbance of the dye at 620nm and 30 °c by the fixed time method. selenium can be determined in the range of 0.004 — 0.12 1.1g.m1-1 . ...

Objectives: This study aimed to evaluate whether conjunctival flora is different in patients with chronic renal disease (CR) among its subgroups and healthy subjects.
 Methods: A total of 105 adult CR patients; 35 hemodialysis (HD), diabetic (DHD), transplantation (RT), 40 subjects were enrolled. After ophthalmologic examination, a swab was taken from the lower fornix right eye using cotto...

objective: different cryoprotectants are used for cryopreservation of ovarian tissue in patients at risk of infertility. ethylene glycol (eg), dimethyl sulfoxide (dmso) and propanediol (proh) have been chosen as the basic permeable cryoprotectants due to their decreased glass-formation characteristics compared to other cryoprotectants. in the present study, the effects of two different vitrific...