The invention relates to an extracting technique of natural Chinese medicinal herb Daemonorops draco B1., especially a processing method of separating effective components in Daemonorops draco B1. by supercritical fluid extraction. Its character: use CO2 to supercritically extract nonpolar ineffective ...
A method is described to measure freely dissolved compounds, using solid-phase microextraction (SPME) as sampling technique. Currently applied techniques, like solvent extraction, have the disadvantage of extracting the total amount of a... WHJ Vaes,Enaut Urrestarazu Ramos,HJM Verhaar,... - 《...
The stability constants of 81 metal complexes were calculated using the newly‐developed method which was previously used for determining pK values of acid–base dissociation constants by plane wave functions. Fifteen metal ions and 36 ligands were chosen, and a wide range of the complexes was stud...
Briefly explain the circumstances under which a mixed solvent recrystallization method would be used to recrystallize a given compound. Explain: 2H2O + C \longrightarrow CO + 2H2 Zn + 2HCl r H2 + ZnCl2 What is the theory of simple distillation and fractional distillation? Which mixture has th...
a提取的条件、方法、溶剂等的改变均会对羊栖菜提取物的活性会产生影响 The extraction condition, the method, the solvent and so on the change can withdraws to Yang Qicai activeness be able to have the influence [translate] ae-mail: fjnic@fjdcb.fz.fj.cn [translate] a我喜欢动手 [translate] a...
The invention concerns a method for preparing a pharmaceutical composition in the form of microspheres with prolonged release of a water-soluble active principle. The invention is characterized in that it comprises the following successive steps: dissolving an active principle in an appropriate amount ...
Below is a short introduction to these methods followed by results of the Beermaster spectrum analysis. Iso-octane extraction In the manual iso-octane extraction method, the acidified beer/wort is extracted with iso-octane by optimized shaking process. Extract is measured with manual photometer at...
10. The method according to claim 8 wherein said antibiotic substance is an antibacterial substance. Description: BACKGROUND OF THE INVENTION This invention relates to the identification, isolation and preparation of an active principle by extraction from natural tissues, and in particular it relates ...
Steam explosion technology is an emerging pretreatment method that has shown great promise for food processing due to its ability to efficiently destroy the natural barrier structure of materials. This narrative review summarizes the principle of steam explosion technology, its similarities and differences...
Another quantity upon which to judge the applied electronic structure method was the Bader charges obtained by applying the atoms in molecules (AIM) population analysis [66,67,68,69,70]. For both bulk materials of YF3 and HoF3, all tested methods predicted a metal charge of 2.2–2.4 e an...