Search results
Results from the WOW.Com Content Network
The conversion between hydroxyl value and other hydroxyl content measurements is obtained by multiplying the hydroxyl value by the factor 17/560. [2] The chemical substance may be a fat, oil, natural or synthetic ester, or other polyol. [3] ASTM D 1957 [4] and ASTM E222-10 [5] describe several versions of this method of determining hydroxyl value.
It is the hydroxyl endmember of the complex apatite group. The OH − ion can be replaced by fluoride or chloride, producing fluorapatite or chlorapatite. It crystallizes in the hexagonal crystal system. Pure hydroxyapatite powder is white.
The aqueous solution in the classical reaction contains glucose, sodium hydroxide and methylene blue. [14] In the first step an acyloin of glucose is formed. The next step is a redox reaction of the acyloin with methylene blue in which the glucose is oxidized to diketone in alkaline solution [6] and methylene blue is reduced to colorless leucomethylene blue.
Hydroxylamine derivatives substituted in place of the hydroxyl or amine hydrogen are (respectively) called O- or N‑hydroxylamines. In general N‑hydroxylamines are more common. Examples are N‑tert‑butylhydroxylamine or the glycosidic bond in calicheamicin. N,O‑Dimethylhydroxylamine is a precursor to Weinreb amides.
As hydroxyl radicals are short-lived in solution, they need to be generated upon experiment. This can be done using H 2 O 2, ascorbic acid, and Fe(II)-EDTA complex. These reagents form a system that generates hydroxyl radicals through Fenton chemistry. The hydroxyl radicals can then react with the nucleic acid molecules. [17]
Young powered the Hawks to a wild 124-121 win over the Utah Jazz on Tuesday night with one of the most ridiculous shots of his career. Young's shot was only half of the finish at the Delta Center.
Starch gelatinization is a process of breaking down of intermolecular bonds of starch molecules in the presence of water and heat, allowing the hydrogen bonding sites (the hydroxyl hydrogen and oxygen) to engage more water. This irreversibly dissolves the starch granule in water. Water acts as a plasticizer.
Lonzo also speculated that years of training on the hard concrete of Chino Hills State Park could have played a role in the cartilage issues that have hammered his career.