natural base

natural base的基本解释

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天然碱

与natural base相关的网络例句 [注：此内容来源于网络，仅供参考]

Complicated system ; space metric tensor ; natural base ; physical base ; non-Cartesian tensor ; Cartesian tensor ; helical-Cartesian coordinate system ; parabolic cylindrical coordinate system

复杂系统；空间度量张量；自然基物理基；笛卡儿张量；非笛卡儿；张量；螺旋线——笛卡儿坐标系；抛物柱面坐标系

Six experimental stages were designed in our procedure, those are:(1) metabolite recovery and tested sample preparation: the metabolites were recovered by Amberlite XAD-2 absorption, followed by MeOH elution and solvent concentration;(2) antioxidant detection and strain selection: samples were quantitatively analyzed by the inhibition effects on formation of lipid peroxides and TBARS to screen the strains able to produce antioxidants. According to the established screening methods, we chose out a strain of actinomycetes, designed as AMBL-029C;(3) antioxidant purification: the fermentation broth was recovered by a series of separation techniques including centrifugation, Amberlite XAD-2 absorption, followed by MeOH elution and a successive TLC purification. The resulting primary purified compound [temperately designed as AMBL-029C-TS] was further analyzed by HPLC to monitor its purity;(4) physical-chemical characteristics: judging from the acid-base fractionation experiments, and the pH and temperature stability tests, the compound was deduced to be a acidic compound with the properties of low polarity and highly pH and temperature stable;(5) mechanism of the antioxidant: in comparison with some other known antioxidants, TS was subjected to investigate its antioxidant mechanism, together with BHT,-tocopherol, as well as two streptomyces metabolites, homogentisic acid and -phenylpyruvic acid, which were previously isolated as the natural antioxidants in our laboratory.

针对本实验目的，我们设计了以下的实验步骤﹔（1）二次代谢物回收及检测样本处理：我们将发酵所得的培养上清液，利用疏水吸附性树酯Amberlite XAD-2吸附回收，并以甲醇溶离及真空减压浓缩脱水等方式处理，以取得提供抗氧化活性筛选之检测样本；（2）抗氧化活性检测及菌种筛选：以「过氧化脂质」和「硫丙二醯尿」的生成量进行定性定量分析以作为抗氧化物质生产菌筛选之用；经此筛选程序，我们选获了具有抗氧化物质高生产力的菌株，命名为AMBL-029C；（3）抗氧化物质的分离纯化：针对生产菌株的发酵回收处理液，以矽胶薄层色层分离法经物质层析纯化后，并以高效能液相层析法(High performance liquid chromatography；HPLC)分析物质可得一初级纯化物质，命名为AMBL-029C-TS；（4）抗氧化物质的物理化学性质分析：由酸碱转溶（acid-base fractionation）实验得知，此抗氧化物质属於中低极性的强酸性物质，对温度（37℃-100℃）及酸碱度（pH3.0-13.0）均表现出高稳定性；（5）在抗氧化机制探讨方面，我们针对数种不同的抗氧化机制进行探讨，即： 1。

The company's main product of natural base oil, rosemary oil and other natural essential oils in a variety of base oil can be 12,000 tons in production and marketing, rosemary oil, more than 200 tons, has become the domestic cosmetics, medicines, food spices and raw materials import and export enterprises 1, but also Hong Kong's major natural fragrance oil, base oil import and export companies.

公司主营产品天然基础油、迷迭香油及其他各种天然香料油中基础油可年产销12000吨，迷迭香油200多吨，已成为国内化妆品，药品，食品香料及原料的进出口企业之一，也是香港主要的天然香料精油、基础油进出口公司。

与natural base相关的网络解释 [注：此内容来源于网络，仅供参考]

base of natural logarithms：自然对数的底

base of logarithm 对数的底 | base of natural logarithms 自然对数的底 | base period 基本周期

base of natural logarithm：自然封數底

母材試驗片 base metal test specimen | 自然封數底 base of natural logarithm | 基油 base oil

Trainable natural language processor：訓練的自然語言處理器

- Trainable auto mail-classifier. -訓練的自動郵件分類. | - Trainable natural language processor. -訓練的自然語言處理器. | - Trainable knowledge base engine. -訓練的知識庫中相應的引擎.