| 词汇 | stearic-acid |
| 释义 | stearic acid noun[ U ] chemistry specializeduk /stiˌærɪk ˈæsɪd/ us /ˌstɪr.ɪk ˈæsɪd/ a substance like wax that is used for making candles and for some medicines硬脂酸 Chemistry: types of chemical acid salt aerogel albumin alkali metal alkaline alkaloid antioxidant carbohydrate homologous series inorganic isopropanol ketone lectin melamine monosaccharide mothball propellant saline soluble sulphide Examples of stearic acidstearic acid Our results agreed with their findings except in the case of stearicacid, which increased with late planting. While some stearicacid was extracted from most of the batches, yields are less than those obtained by liquid-liquid extraction for all sample batches. In addition, important levels of stearicacid (18:0), 18:1 and 18:2 were observed. The stearicacid was incorporated into the sulphate mineral in the laboratory by precipitating magnesium sulphate from a solution that contained stearicacid. Various starting concentrations of stearicacid in solution in methanol were precipitated. The primary approach for generating plant oils enriched in stearicacid has been to enhance metabolic flow from palmitic to stearic acid in developing seeds. This suggests that intracrystalline stearicacid and magnesium stearate are present. However, it should be noted that some of the intracrystalline organic matter would probably still be present as stearicacid and on pyrolysis could produce n-alkanes that would readily volatilize. Stearicacid was chosen because of its relatively ubiquity as a biomolecule, and because of its carboxylic acid functionality and the ability to form organic salts (magnesium stearate). Stearyl alcohol is prepared from stearicacid or some fats by the process of catalytic hydrogenation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A second problem is that the stearicacid makes the paper brittle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The salts and esters of stearicacid are called stearates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Most of the surviving 1888 recordings would be formulated from a combination of ceresin wax, carnauba wax, stearicacid, and beeswax. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the fat stearicacid is present up to 40-45% and palmitic acid up to 10-13%. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He was able to transform liquid oleic acid into solid stearicacid by the use of catalytic hydrogenation with dispersed nickel. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of stearic acid These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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