Kollo CV هو متاح أيضا في بلدك: الولايات المتحدة الأمريكية. بدء فرص جيدة هنا الآن!

Chemistry of Traditional Chinese Medicine Terpenoids مؤقت وظيفة

2022-10-26 02:53   الموارد البشرية   Dubai   67 الآراء المرجعي: 2537
تفاصيل الوظيفة

Original Title: Chemistry of Traditional Chinese Medicine Terpenes and Volatile Oils (Volatile Oils) Medical Liaison officer Club Volatile oil Definition: Volatile oil, also known as essential oil, is a kind of oily liquid existing in(i.e. Houttuynium) in Houttuynia volatile oil, methyl n-nonanone, etc. Other compounds can bes, while the fatty oil will leave permanent oil stains, which can be distinguished from each other. The volatile oil can be distilled with water vapor. 3. Solubility Expand the full text Volatile oil is insoluble in water, but soluble in various organic solvents, such as petroleum ether, ether, carbon disulfide, grease and so on. It can be completely dissolved in high concentration ethanol,molecular distillation systems, while only a part of it can be dissolved in low concentration ethanol. 4. Physical constants Most of the volatile oils are lighter than water, and some are heavier than water (such as clove oil and cinnamon oil). The relative density is generally between 0.85 aubstances, which can not be distilled with water vapor. Therefore, the method of preparing volatile oil should be appropriate, and the product should be sealed in a brown bottle and stored at low temperature. 6. Chemical properties Volatile oil often contains double bonds, alcoholic hydroxyl groups, aldehydes, ketones,jacketed glass reactor, acidic groups, lactones and other structures, so it can react with bromine and sodium bisulfite, condensation reaction with hydsorption method Oils and fats generally have the property of absorbing volatile oil, which is often used to extract valuable volatile oil, rotovap distillation ,wiped film distillation, such as rose oil, jasmine oil and so on. There are two kinds of absorption methods, namely cold absorption method and warm immersion abso compound can be given by comparing the computer with the standard spectrum of the database,decarboxylation after extraction, and can also be confirmed by referring to relevant literature data, thereby greatly improving the speed and research level of analysis and identification of volatile oil. In addition, the advent of multi-stage mass spectrometry (MSn) provides a new way for the qualitative and quantitative analysis of complex volatile oils. Return to Sohu to see more Responsible Editor:. toptiontech.com

وصف الشركة
Difference between Short-path Distillation and Molecular Distillation-Shanghai DEA