选择性的

The ligand of the chiral Schiff base and acetylacetone vanadium are subjected to complexation in situ, hydrogen peroxide is taken as an oxidant, aryl alkyl thioether asymmetric oxidation reaction is catalyzed in a toluene or dichloromethane solution under low temperature or room temperature, enantioselectivity of chiral sulphoxide is 72 percent to 95 percent ee, and yield is 42 percent to 83 percent.

将上述手性西佛碱配体与乙酰丙酮氧钒原位络合，采用双氧水为氧化剂，在甲苯或二氯甲烷溶液中低温至室温下催化芳基烷基硫醚不对称氧化反应，手性亚砜的对映选择性为72％-95％ee，产率为42％-83％。

The reactions of linear alkanes on SO~4^2-/ZrO~2 solid superacid catalysts were studied.

本文考察了SO~4^2-/ZrO~2固体超强酸催化剂上正构烷烃的反应及影响催化剂活性和选择性和各种因素。

Part Ⅱ: The evelopropanation reactions of both semi-stabilized telluronium and arsoniumylides with α,β--unsaturated ketones proceed smoothly.

第二部分：烯丙基、巴豆基、三甲基硅基烯丙基、肉桂基、苄基碲、胂两种叶立德与α，β-不饱和酮均可以成功地进行环丙烷化反应，并且表现出不同的立体选择性。

Finally, Prdm16-deficient brown fat displays an abnormal morphology, reduced thermogenic gene expression and elevated expression of muscle-specific genes.

PRDM16（一种锌指蛋白，已知能够刺激棕色脂肪选择性基因表达）可强有力地调控肌肉与棕色脂肪之间的双向细胞命运转换。

The trilobe 355 catalyst(Fe-K-Mg-Ce-Mo) for ethylbenzene dehydrogenation which had the characteristics of high catalytic activity,high selectivity,low water-oil ratio ,high side pressure,and good water resistance was developed.

开发成功了具有高活性、高选择性、低水油比、高侧压强及抗水性能好等特点的三叶型355催化剂（Fe－K－Mg－Ce－Mo）。

Methods The Epidermal stem cell were isolated by adhering to collagen type IV after obtained by digesting human foreskin with Dispase Ⅱ and Tryp and culture in vitro in K-SFM. The expressions of β1-integrin and keratin 19 (K19) in epidermal stem cell were detected with immunocytochemical methods,and the colony forming efficiency was also studied .

中性蛋白酶和胰蛋白酶两步法从手术切除的人包皮组织中分离表皮层和真皮层，并获得表皮单细胞悬液，采用Ⅳ型胶原铺板选择性粘附、分离和角质形成细胞无血清培养基培养表皮干细胞。

Unpromoted α-MoC(subscript 1-x) produced mainly CO2 and light hydrocarbons, addition of K2CO3 as a promoter, however, resulted in remarkable selectivity shift from hydrocarbons to alcohols.

结果表明，K改性使α-MoC(下标 1-x)催化剂的CO加氢选择性发生显著变化。

The present study showed ursolic acid has a selective cytotoxic effect on human uveal melanoma cells in vitro.

讨论：指示熊果酸在体外试验中对人类葡萄膜黑色素瘤细胞有明显的选择性细胞毒性作用。

It is found that the oxidized insulin B chain is specifically cleaved with palladium complexes and 〓 ion.

研究了Pd配合物和〓离子对氧化态胰岛素B链的选择性切割。

Our products are characterized by strong decoloring power, large specific surface area, strong adsorptive power, low impurities and effective filtering etc.

我公司引进设备生产的活性炭产品，具有脱色能力强、比表面积大、吸附能力好、杂质含量低、过滤速度快、选择性强等特点。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。