A semisolid tetrazolium salt agar medium developed for testing sensitivity to KCN is easier to interpret, has a longer storage life, and is less critical in the size of inoculum than is Moeller KCN broth medium.

PURPOSE To quantitatively assess the superoxide dismutase 1 (SOD1), transforming growth factor, beta 1 (TGF-β1), and dual-specificity phosphatase 1 (DUSP1) messenger ribonucleic acid (mRNA) expression levels as the main intracellular reactive oxygen species neutralizers, wound healing mediators, and immunomodulators (respectively) in keratoconic (KCN) and non-KCN corneas. METHODS Total RNA wa...

The experiments seem to indicate that the toxicity of HCN and KCN for amebae is due to their effect on the cell membrane and not on the internal protoplasm. Concentrated solutions (N/10-N/300) of HCN or KCN produce an initial increase in viscosity of the protoplasm of amebae (immersed) which is followed by liquefaction and disintegration of the cell. Dilute solutions of HCN or KCN decrease the ...

The oxygen in hemoglobin is liberated by K(3)Fe(CN)(6) and not by KCN, that in hemocyanin by KCN and not by K(3)Fe(CN)(6), that in hemerythrin by both, and that in echinochrome by K(3)Fe(CN)(6) and not by KCN. The bearing of these results on the nature of the substances involved is discussed.

Polarography, using cylindrical platinum electrodes, proved suitable for measuring changes in the internal apical O(2) concentration of the primary root of pea (Pisum sativum L. cv Meteor) effected by KCN and/or salicylhydroxamic acid (SHAM) in the bathing medium. An electrical rootaeration analog was used to help evaluate some of the results. Concentrations of KCN </=0.05 millimolar had no sig...

Far red and near infrared (NIR) light promotes wound healing, but the mechanism is poorly understood. Our previous studies using 670 nm light-emitting diode (LED) arrays suggest that cytochrome c oxidase, a photoacceptor in the NIR range, plays an important role in therapeutic photobiomodulation. If this is true, then an irreversible inhibitor of cytochrome c oxidase, potassium cyanide (KCN), s...

Although high levels of KCN (53 micromoles per gram fresh weight of seed, corresponding to 3.2 millimolar) failed to block germination of lettuce seeds incubated in covered Petri dishes, the same levels totally blocked germination in sealed dishes. Inhibition was reversed by removing the seal. Placement of KCN remote from seeds also blocked germination in closed systems. Cyanide effectiveness w...

Rhodanese is the major detoxifying enzyme for cyanide and requires sulphur for its action. Allium cepa (Onion) is rich in organosulphur which may serve as an antidote for cyanide poisoning by supplying sulphur to the enzyme rhodanese. The possible effects of Allium cepa on rhodanese activity during cyanide toxicity was investigated in male Wistar rats. Sixty Wistar rats (150-180 g) were divided...

purpose: to report two patients with keratoconus who underwent regrafting to correct anisometropia and high astigmatism after penetrating keratoplasty. patients and findings: the first case is a 34-year-old man with keratoconus who had undergone penetrating keratoplasty. the sutures were removed 6 months postoperatively that led to high hyperopia. regraft was performed considering vitreous leng...