منابع مشابه
Boric Acid and Borates
Boric acid and its chemical relatives are pesticides that are derived from the element boron. Boron rarely occurs alone and is typically found in combination with other elements; common combinations are boric acid or borates.1 Unlike many pesticides which are synthetic compounds,2 boric acid and related pesticides are naturally occurring compounds.1 Boron compounds are widely found in rivers, s...
متن کاملReproductive toxicology. Boric acid.
Boric acid (BA), widely used for both medicinal and nonmedicinal purposes, was known to adversely affect reproduction and fertility in rodents. NIOSH, in evaluating the literature prior to writing a Criteria Document, asked NIEHS to perform an RACB study on BA to generate both structural and functional data to be used for setting exposure criteria (Fail et al., Fundam Appl Toxicol 17:225-239 [1...
متن کاملSeparation of Vitamin B2 and B12 byImpregnate HPTLC Plates with Boric Acid
A high performance thin layer chromatography system (HPTLC) for the separation of vitamin B2 and B12 has been developed. The separation was successfully using a solvent system of methanol, water, ammonia 7.3.1 (V/V) as mobile phase on HPTLC plates impregnated with boric acid. The effect of other mobile phases on the separation of vitamins was also examined. The method is based on different beha...
متن کاملChelation of boric acid with some nucleosides.
Tab. 1. NMR-Spektren substituierter Acetanilide a . a In CDC13 , 60 MHz. b Die Zuordnung erfolgte unter der plausiblen Annahme, daß in der eis-Verbindung der Methylteil der CH3CO-Gruppe oberhalb der aromatischen Ringebene zu liegen kommt, ihr NMR-Signal im Vergleich zur fransVerbindung also nach höherem Feld verschoben sein sollte. c Im Falle des cts-2.6-Diisopropyl-acetanilides zeigen die iso-...
متن کاملBoric acid preservation of urine samples.
Comparison of the results of bacteriological culture and microscopic examination of urine samples transported over a distance by the dip-inoculum transport medium, ice-box, and boric acid preservation with "natural" urine specimens showed that the last, in a final concentration of 1.8%, gives satisfactory preservation.
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ژورنال
عنوان ژورنال: Scientific American
سال: 1887
ISSN: 0036-8733
DOI: 10.1038/scientificamerican04301887-9444supp