羟基

Regarding dietary intake of isoflavones, nonsignificant inverse associations were observed for both genistein and daidzein.

在异黄酮饮食摄入量方面，三羟基异黄酮和daidzein无显著翻转相关性。

The condensation reaction,in which the yield of intermediate product after refining process was more than 90%,used iso-butylaldehyde and formaldehyde as materials,Et 3N as catalyst.The hydrogenation,in which the conversion of hydroxypivaldehyde and selectivity of NPG were respectively 99% and 95%,used Cu-ZnO as catalyst,and ethanol as solute,meanwhile in the hydrogenation,the impurity in material could also ...

缩合反应采用异丁醛和甲醛为原料，三乙胺为催化剂，在 60℃左右反应，缩合产物经减压蒸馏和结晶、干燥，得到收率为 90 %以上的中间体羟基戊醛；加氢反应采用自制的Cu -ZnO催化剂，乙醇为溶剂，在 15 0℃将HPA加氢生成新戊二醇，HPA转化率为 99%，新戊二醇收率在 95 %以上，而且HPA缩合反应的副产物在加氢反应中也转化为新戊二醇。

RESULTS: Pseudopodia of mononuclear macrophage in the normal control group were intact, nuclear membrane was normal, and nucleoplasm was uniformed.

结果：正常对照组单核巨噬细胞伪足完整、核膜正常、核质均匀；20，100，200 mg/L纳米羟基磷灰石诱导24 h后，单核巨噬细胞具有典型的凋亡形态学特征。

The solubilities in some solvents were investigated and solubilization abilities of OCC for water-insoluble drugs were evaluated. The results show that the degree of substitution of carboxymethyl groups and octyl groups are determined to be 115.9% and 58.0%, respectively. OCC are insoluble in organic solvents while show a much better solubility in water and formed opalescence solutions, which increased the solubility of paclitaxel up to 500 folds in water. The drug loading and drug encapsulation efficiency of OCC are 34.6% and 89.9%, respectively.

所制备的OCC羧甲基取代度为115.9%，取代主要发生在6位羟基上；辛基取代度58.0%，取代主要发生在2位氨基上；与壳聚糖相比，OCC分子间／内氢键作用减弱；OCC在常用的有机溶剂中不溶，但在水中溶解度增加，能够形成具有淡蓝色乳光的纳米胶体溶液，对难溶性抗肿瘤药物紫杉醇具有优越的增溶能力，使紫杉醇在水中的溶解度提高近500倍，载药量34.6%，包封率为89.9%。

Its well-defined crystal structure and surface abundance of silanol groups offer good supports to study the surface organometallic chemistry.

沸石分子筛是一类性能优良和用途广泛的无机材料，其确定的晶体结构和丰富的表面羟基为表面金属有机化学的研究提供了良好基体。

Meanwhile, when the supported ionic liquid is used in asymmetric dihydroxylation reaction, there was no catalystic activity of osmium catalyst.

离子液体固载于改性后BMMs在不对称双羟基化反应中由于分子筛改性引入的氨基与锇催化剂的配位作用使其失去活性。

Objective To investigate the effect of hydroxyapatite nanoparticles on the growth of osteosarcoma U2-OS cell line.

目的 研究羟基磷灰石纳米粒子对骨肉瘤U2-OS细胞生长的影响。

Diketoreductaseis a class of new enzyme, and compared with other oxidoreductase, whose uniqueness lies in its ability to restore at the same time reduced to two hydroxy carbonyl and a high degree of stereoselectivity.

双羰基还原酶（Diketoreductase，简称DKR）是一类全新的酶，与其他的氧化还原酶相比，其独特之处在于它能够同时还原两个羰基还原成羟基，并有高度的立体选择性。

Propenediol oxidoreductase isoenzyme is one of the key enzymes in biotransformation systhesis of 1,3-propenediol,and is encoded by the yqhD gene.

大肠杆菌1，3-丙二醇氧化还原酶同工酶被yqhD的基因编码，能催化羟基丙醛生成1，3-丙二醇。

The acidic composition can be prepared by mixing a monovalent or polyvalent cation and an organic acid in the presence of a strong oxyacid, wherein the resultant acidic composition is less corrosive to a ferrous metal than a solution of a mineral acid having the same acidic pH value as that of the acidic composition, and where in the acid composition is more biocidal than a mixture of the organic acid and a metal salt of the organic acid which mixture has the same acid normality value as that of the acidic composition.

所述酸性组合物可以在一种强羟基酸存在时，通过混合单价或多价阳离子和有机酸来制备，其中与具有相同的酸性pH值的无机酸溶液相比，所形成的酸性组合物对含铁金属的腐蚀性更小，并且与具有相同酸当量值的有机酸与有机酸金属盐的混合物相比，所述的酸组合物具有更强的杀生物作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。