The gas phase chemistry of neutral-neutral reactions of interest in the interstellar medium (ISM) is poorly understood. The rate coefficients (kOH) for the majority of the reactions of hydroxyl (OH) radicals with interstellar oxygenated species are unknown at the temperatures of the ISM. In this study, we present the first determination of kOH for HC(O)OCH3 between 22.4 ± 1.4 and 64.2 ± 1.7 K. ...

purpose: to report the prevalence of fungal keratitis as a cause of corneal ulcer in patients refered to boo-ali sina hospital in sari and identify the predisposing factors.  methods: this prospective study was conducted on patients who presented with corneal ulcers to the ophthalmology ward at boo-ali sina hospital in sari, 2004-2005. using standard techniques, a corneal scraping was performed...

Yersinia pseudotuberculosis was recovered from KOH-treated precipitates of 20.6% of 500 freshwater samples. KOH treatment of precipitates is a simple and expedient means of recovering Y. pseudotuberculosis from such samples.

Remarkable changes are brought about by KOH in transforming negative cells of Nitella (showing dilute solution negative with KOH) to positive cells (showing dilute solution positive with KOH). NaOH is less effective as a transforming agent. This might be explained on the ground that the protoplasm contains an acid (possibly a fatty acid) which makes the cell negative and which is dissolved out ...

Background. There are relatively few studies published examining the sensitivity and specificity of potassium hydroxide (KOH) smear and fungal culture examination of tinea pedis. Objective. To evaluate the sensitivity and specificity of KOH smear and fungal culture for diagnosing tinea pedis. Methods. A pooled analysis of data from five similarly conducted bioequivalence trials for antifungal d...

BACKGROUND Genital warts are the most common viral sexually transmitted disease affecting 1% of the population. A prospective, open-label controlled trial was performed to compare topical 5% potassium hydroxide (KOH) solution with CO2 laser in the treatment of female genital warts. METHODS Seventy patients were enrolled in the study after convenience sampling. Right-sided lesions of the patie...

Studies were done to determine the usefulness of dilute alkali (KOH) treatment of meat samples for direct isolation of Yersinia enterocolitica and Yersinia pseudotuberculosis, without enrichment. Virulent Y. enterocolitica and Y. pseudotuberculosis in pork contaminated with 10(2), 10(3), and 10(4) cells per g survived the direct KOH treatment and were never recovered by using KOH postenrichment...

Several species of anaerobic bacteria display variable Gram stain reactions which often make identification difficult. A simple, rapid method utilizing a 3% solution of potassium hydroxide to distinguish between gram-positive and gram-negative bacterial was tested on 213 strains of anaerobic bacteria representing 19 genera. The Gram stain reaction and KOH test results were compared with the ant...

A mixture of solid KOH in dimethyl sulfoxide has a strong basicity, but only a low nucleophilicity and is used for Q methylation of ketones. With this simple and inexpensive reagent complete methylation with yields up to 90% can be achieved. Solid KOH in dimethyl sulfoxide (DMSO) is a very strong base with a pKa-value of 27 or even higher. l-3 On the other hand, the nucleophilicity of this reag...

The optimization of an alkaline pretreatment process for the delignification of sugarcane bagasse (SCB) to enhance the subsequent enzymatic hydrolysis was performed according to the Doehlert uniform shell design. In this experimental design, the effect of two factors—potassium hydroxide (KOH) concentration and autoclaving time at 121 C (1 atm)—on cellulose, hemicellulose, or the total polysacch...