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10g
产品货号:XF-J3365
产品规格:10g
产品包装:瓶
储存条件及有效期:详见标签
本产品仅供科研实验用,不做其他用途!
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文献和实验胆固醇是环戊烷多氢菲的衍生物,它不仅参与血浆蛋白的组成,而且也是细胞的必要结构成分,还可以转化成胆汁酸盐、肾上腺皮质激素和维生素D等。胆固醇在体内以游离胆固醇及胆固醇酯两种形式存在,统称总胆固醇。总胆固醇的测定有化学比色法和酶学方法两类。本实验采用前一方法。 胆固醇及其酯在硫酸作用下与邻苯二甲醛产生紫红色物质,此物质在550nm波长处有最大吸收,可用比色法作总胆固醇的定量测定。胆固醇含量在400mg/100ml内,与OD值呈良好线性关系。 本法不必离心
Differences Between Biogenic Amine Detection by HPLC Methods Using OPA and Dansyl Derivates
Biogenic amines can be formed and degraded as a result of normal metabolic activity in animals, plants, and microorganisms and are usually produced by the decarboxylation of amino acids (1 ). Recent trends in food security are promoting
. In the alkaline medium, histamine reacts with o -phthalaldehyde (OPA) to form fluorescence products. This feature has been utilized for sensitive determination of histamine by HPLC with postcolumn OPA derivatization of histamine
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