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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。

A composition that can be used as catalyst is disclosed, which comprises or is produced by combining, a titanium compound; either a complexing agent, a combination of a complexing agent, hypophosphorous acid or a salt thereof, and optionally a solvent, a zirconium compound, or both, combinations thereof; a phosphorus compound; and, optionally, a solvent.

公开了一种可用作催化剂的组合物，该组合物包括钛化合物；络合剂，或络合剂、次磷酸或其盐和选择性使用的溶剂、锆化合物或二者的组合，或它们的组合；磷化合物和选择性使用的一种溶剂；或是用它们的组合制成的催化剂。

Compound 15 is a new compound and named myrisisolignan.Compound 7 is isolated from the genus Myristica for the first time.

化合物15为新化合物，命名为肉豆蔻异木脂素(myr-isisolignan)；化合物7为首次从肉豆蔻属植物中分离得到。

The effect of the SDT／S on the properties of NR compound was investigated The results showed that SDT／S plays the advanced role in NR compound,in order to keep the vulcanizate properties level as before may decrease some accerlator;the physical properties of overcured vulcanizate,the adhesion strength of optimum cure or overcured valcanizate between rubber and cord were improved by adding 2 phr of SDT／S to NR compound.

研究了SDT／S对天然胶胶料配方各项性能的影响。结果表明：在配方中使用SDT／S，对天然胶胶料起硫化促进作用，为保持原水平的硫化特性，可以适当减少促进剂的用量；可有效提高胶料过硫化条件下的300%定伸应力、扯断强度、邵氏硬度、撕裂性能、磨耗性能，可有效提高正硫化或过硫化条件下的胶料与帘线间的附着力。

It was indi-cated that compound Ⅳ and Ⅴ possess antitumor activity. The〓 of 〓 and 〓 was 7.85 and 7.45 μg/mL respectively to〓 compound Ⅳ,Ⅴ and Ⅶ show pesticidal activity. The inhibi-tory effect of compound Ⅶ(2) was 1OO% to Barnyardgrass,and 100% to Rice Sheath Blight.

表明化合物Ⅳ、Ⅴ具有一定的抗癌活性（如Ⅳ(1)及Ⅴ(2)，对人白血病细胞株〓的〓分别为7.85和7.45ug／ml，化合物Ⅳ、Ⅴ及Ⅷ具有一定的农药活性（如Ⅷ(2)在50ppm时对水稻纹枯菌的抑制率为100%，对稗草的抑制率（100ppm为100%。

In the study of testing the overall ability of anti-oxidation, polyhydroxy substituted N-benzoylserotonin derivatives (compound 1-10) still have the better overall ability of anti-oxidation than control group, trolox. The IC50 values of compound 1-10 range 2.49 to 3.92, while the IC50 value of trolox is 5.23 μg/ml. Compound 10 is still the best derivative which has the best overall ability of anti-oxidation; IC50 value is 2.49 μg/ml.

而在总抗氧化能力结果显示，相较於对照组水溶性维生素E之IC50值5.23 μg/ml，多羟基取代之N-色洛冬宁苯甲醯胺衍生物（化合物1 ~ 10）之总抗氧化能力效果IC50值介於2.49 ~ 3.92 μg/ml之间，十种醯胺化合物的总抗氧化效果皆比对照组水溶性维生素E的抗氧化效果还要来得优越，其中效果最强的仍为化合物10，其 IC50值为 2.49 μg/ml。

A nanometer compound material is a new type of material developed in recent years, and the polymer/inorganic nanometer compound material formed by dispersing the inorganic nanometer structural unit into the polymeter is a type of compound material.

纳米复合材料是近年来发展起来的新型材料，聚合物／无机纳米复合材料是将无机纳米结构单元分散于聚合物基体中所形成的复合材料。

The results of research showed that compound ferrous flocculant has simple preparation and not any second pollution matter is produced to the environment, it has big and stout floes formation and fast speed sedimentation while dealing with waste water, it is positively charged according to the electrophoresis, it belongs to cationic flocculant, can gives better coagulation results in turbidity removal, color removal, the maximum removal rate of turbidity and color are 95.4% and more than 81.7%, respectively. There are interactions between polysilicic acid and hydrolyzed ferrous species, the compound ferrous with appropriate Si/Fe not only but also can lower the water treatment cost. The compound ferrous removes colloid particles in water by charge oxidation-reduction, neutralization and furl mechanism.

研究结果表明：复合亚铁制备工艺简便，无二次污染；处理水样时产生的矾花大，密实、沉降速度快；复合亚铁带电性为正，为阳离子型絮凝剂；复合亚铁具有较好的除浊、脱色能力，除浊率及脱色率最高分别可达95.4％及81.7％；在复合亚铁中，聚硅酸与亚铁的水解产物间存在着相互作用，合适的硅铁摩尔比有利于提高混凝效果，而且还可以降低投药成本；复合亚铁是通过氧化还原、吸附电中和及卷扫三种作用机理起混凝作用的。

Autocorrelation topological study on the acute toxicities of substituted aromatic compound s;2. The autocorrelation topological researches on slow and acutetoxicities of substituted aromatic compound s to scenedesmus ubliquus, rat and so on;3. Results show that the SW and KOW of the substituted aromatic compound s could be better forecasted at AM1 level.

应用分子力学方法MM+和半经验量子化学AM1、MNDO和PM3法得到了54种取代芳烃的优势构象，在此基础上结合分子图形学技术，获得相应优化构象的电子结构参数和几何结构参数，并将这些参数与取代芳烃的辛醇/水分配系数和溶解度相关联。

The high speed lumber compound machining center was the woodworking machinery profession key equipment, this paper elaborates the present development Qituation of the contemporary woodworking profession, analyzes the princple of the high speed lumber compound machining center control system, takes UMAC as the core component and develops control system used in the high speed lumber compound machining center by combining its harduare with its soft wase.

高速木材复合加工中心是木工机械行业的关键装备，文中阐述了当代木材加工行业的发展现状，分析了高速木材复合加工中心控制系统的原理，并且以UMAC为核心器件，在配合其硬件和软件的基础上开发了一种用于高速木材复合加工中心控制系统。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我