非活性的

The 20S catalytic core of the 26S proteasome has the shape of a barrel made of four rings which are composed of seven differentαsubunitsα_1-α_7 at two outer rings and seven differentβsubunitsβ_1-β_7 at two inner rings at which the catalytic sites locate. Three of theβsubunits contain proteolyses sites, which are sequestered in the hollow interior of the 20S particle. Substrates enter the 20S through a narrow channel formed by theβsubunits, whose N-termini, depending on their conformation, can either obstruct or allow substrate entry and thus function as a gate. This entry channel is narrow and only permits passage of unfolded, linearized polypeptides.

哺乳动物26S蛋白酶体是由一个20S催化颗粒(catalytic particle，CP)和两个19S调节颗粒(regulatory particle，RP)组成的ATP(adenosine-triphosphate，ATP)依赖性蛋白水解酶复合体。20S CP是26S蛋白酶体的催化核心，它是由4个圆环堆叠形成的桶状复合物，其中两侧外环每个环是由α_1-α_7亚基组成，两个内环每个环是由β_1-β_7亚基组成，4个环的中央形成一个狭窄的内腔。2个β内环形成了20S CP的催化中心空腔，其内壁为催化活性位点所在地；外侧α环中心的孔道是底物到达催化中心空腔的通道，一般被α亚基上的N末端所封闭，阻止胞内非目的靶蛋白进入20S CP内被降解破坏。

In presence of non- cancer suspicious patients, serum MMP-2 activity in chronic hepatitis is contrary to decrease at lowest among them. The level of MMP-9 similarly low compare with normal control. Therefore found out that the process from chronic hepatitis to hepatoma, a variation of MMP-2 is earlier to decrease and then to rise. Although there is no great variation but lower in MMP-9 compare to normal control.

肝癌病人的血清中MMP-9及MMP-2两者的变化与正常人相比差距最易观察，当比较所有非癌症病人血清时，慢性肝炎病人血清MMP-2活性表现相反的下降，而且是其中最低的，因此可以看出由慢性肝炎到肝癌的过程MMP-2的变化是先下降再升高，MMP-9虽然没有大变化，相较於正常人却都偏低。

Methane, oxygen and H_2O molecules are activated, ionized and dissociated into active particles such as CH_3~+, O~-, H_2O~+, CH_3, CH_2, CH, H,OH and O, by nonelastic collision with high energy electrons. The particles react with each other in the reactor to synthesize chemically products including gaseous oxy-hydrocarbons.We study the rule of reaction by changing electrical parameter, gas flow etc. Study the conversion of methane, selectivity of gaseous hydrocarbons and yield of methanol under different reaction condition.

针对常规甲烷催化转化和氧化偶联制备含氧化合物的问题，遵循国际化学科学研究前沿"绿色化学"原则，采用自然界存在丰富的CH_4、H_2O和O_2为原料，在绿色友好的常温大气压无任何催化剂的条件下，采用强电场电离放电加速电子及其激励气体分子的极端物理手段，在反应腔体内进行无任何环境污染的非平衡等离子体化学反应，将气体分子激发、电离、离解成CH_4~+、CH_3~+、CH_4~·、H_2O~+、H_2O~·、O_2~+、O(~1D)等活性粒子，生成气态烃及含氧碳氢化合物，整个反应过程实现零污染、零副产品。

This product can increase immunity of livestock and poultry, enhance the activity of phagocyte, which otherwise can not be performed by normal microorganism flora parasitized in animal intestinal tract.

禽畜机体内正常的微生物菌群对机体的免疫系统具有重要的诱发作用，本品可提升动物肠内免疫系统细胞，使一般非特异免疫功能得到协调和提高，加大吞嗜细胞的活性，这些并非原宿于禽畜肠道内微生物菌系所能达到的。

A method was developed for synthesis of DBP catalyzed with non-proton acid and the result showed that aluminum oxide can be used to synthesize dibutyl phthalate characterized with high reaction activity,good selectivity and high rate of conversion,but less environmental pollution.

通过研究非质子酸催化合成增塑剂邻苯二甲酸二丁酯的方法，探讨了合成的最佳工艺条件。实验结果表明，Al2O3催化酯化合成邻苯二甲酸二丁酯具有反应时间短、反应活性和选择性好、产率高、无环境污染等优点、是理想的合成DBP的催化剂。

This makes Ni-W-P powder more suitable for partial hydrogenation of dienes. The kinetic results suggest there are some different between the active sites of Ni-P and Ni-W-P powder. DSC, XRD and EXAFS results suggest that the tungsten codeposition makes Ni-W-P powder more amorphous than Ni-P powder.

动力学结果表明在两种合金微粒上，不仅环戊二烯与环戊烯的相对配位能力不同，而且它们各自的反应速率常数也不一样，表明非晶态Ni-P、Ni-W-P合金微粒的催化活性中心存在着一定的差异。

It was typically indirect effect that the following variations induced in the progenies of endosperms implanted by heavy ion beams were discovered. 1 In comparison with control, there were very high differences in biological trait, anti-oxidation enzyme activity, MDA content and protein content, chromosome aberration rate and micro-nucleus rate in M1 generation. 2 Shorter stem variants and purple stem mutants were analyzed by RAPD and AFLP. The analytic results showed that the sequences of their DNA were changed, so those variations were not physiological damage only. And there were differences among M2 generation plants of the same sort of variants or mutants, it was indicated that M2 generation may be in disjunction.

M1代的生物学性状、幼苗的抗氧化酶活性、MDA含量、蛋白质含量和染色体畸变率及微核率等发生了较大的变化。2）对其矮杆变异株和紫色茎杆突变体（M2）做RAPD和AFLP分子鉴定等研究，结果显示了矮杆变异体和紫色茎杆突变体的DNA序列发生了改变，而非仅仅产生生理损伤；同一种变异体或突变体，在M2代单株间也存在着明显的差异，表明它们可能还处于分离状态。

As to the crabs'immunological research, the immune mechanism of crabs was still unclear, but it was commonly believed that immune of crabs was mainly non-special defense, in the process of which circulating haemocytes, phanoloxidase system, lysozyme, SOD in the serum played an important role.

尽管甲壳动物的血淋巴液内不存在免疫球蛋白，但是具有非特异性免疫的性质，适当的诱导可提高血细胞的吞噬能力及多种体液免疫因子的数量和活性。

It can be proposed that the TS-1/H〓O〓 catalyzed opening ring reaction of propylene oxide was an heterogeneous catalytic reaction occurred on the active sites on the surface of the catalyst, not an homogeneous reaction catalyzed by H〓.

根据已知的实验结果可以推断，TS-1/H〓O〓催化的PO的开环反应是发生在催化剂表面活性位上的非均相催化反应过程，与H〓催化的均相反应不同。

A series of amorphous Ni-Sn-B/SiO 2 catalysts with different tin contents were prepared by salt impregnation and KBH 4 reduction.

采用化学还原法制备了一系列三元非晶态Ni Sn B/SiO2 催化剂，并考察了Sn含量对催化剂的苯乙酮选择加氢制备苯乙醇反应的活性及选择性的影响，同时对Sn改性前后的催化剂进行了系统的表征。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。