查询词典 ortho

D-Pantothenyl alcohol, also called ortho-vitamin 85, is an important nutrition suppled substance. It has been widely applied in the field such as medicine, cosmetic, foodstuff, feed additive, and so on. The preparation of D-pantothenyl alcohol and the optimization of key factor are discussed mainly in this paper. It mainly includes three section.In the first section, with formaldehyde, isobutyl aldehyde and diethyl oxalate as the starting materials, D-pantolactone is prepared via three steps including condensation, catalytic hydrogenation and physical resolution. The specific rotatory power of the product is consistent with imported product.

D-泛醇，俗称原维生素B_5，属维生素B旋类营养增补剂，广泛应用于医药、化妆品、食品、饲料等领域，本文着重探讨了其制备及关键因素的优化，主要内容可分三部分：第一是D-泛内酯的制备，先以甲醛、异丁醛和草酸二乙酯为起始原料合成酮基泛内酯，再经催化氢化得到DL-泛内酯，然后通过物理拆分获得D-泛内酯，得到产物的比旋光度与进口产品基本一致。

Ortho introduces The Coombs Test to identify sensitized Rh-negative patients.

奥索引入了库姆斯氏试验以识别致敏Rh阴性患者。

L-fucose, as raw material, protected with ortho ester, synthesized the glycosyl acceptor 60, 76, thioglycoside doner 57、61、62, fluorglycoside 65、66 and Schimidt doner 68, 70 in a simple and efficient way.

本文从L-岩藻糖出发，以原酸酯保护的方法简单高效的合成了具有合适保护基的糖基受体60、76，糖基供体57、61、62、65、66、68及70。

This dissertation gives the damping iteration method and geome-tric-mean tracing method, both based on inversion of observed ground-water level data, and also gives the proportional iteration (or ortho-gonalization) method based on inversion of hydrogeologic gradient data.

本文建立了用水位观测资料进行反演的阻尼迭代法和几何均值追踪法，利用水力梯度资料进行反演的比例迭代法。

Both electronic and steric effects were observed for the homo coupling of aryl iodides. Electro-withdrawing and ortho substituents gave desired products in low yields.

在取代碘苯的偶联反应中观察到电子效应和位阻效应的影响，吸电子基取代和邻位取代对反应不利。

When 5 is the set of all symmetric and ortho-symmetric matrices, we have first discussed the construction and eigen-pair character of this kind of matrics.

当S是所有对称正交对称矩阵集合时，我们首先研究了这类矩阵的几何结构和特征性质。

Ortho-dichlorobenzene and certain xylenols have the weak band on the short wave-length side of the main band.

在邻二氯苯和一些二甲苯酚中，弱谱带出现于主要谱带的短波方面。

Results Synergized by microwave under the power of 210W, chlorhexidine and benzalkonium bromide represented weak activity for killing Bacillus subtilis var. niger, glutaraldehyde and ortho-phthalaldehyde presented obvious enhanced activity.

结果 在微波输出功率为210W的协同作用下，低效消毒剂显现微弱杀枯草杆菌黑色变种芽胞活性，高效消毒剂杀枯草杆菌黑色变种芽胞的活性则显著增强。

The sound coating for EPC is composed of: 100 percent of quartz sand, 4 percent of Na-sulfuryl bentonite, 3 percent of Na2CO3 (of Na-sulfuryl bentonite), 2.5 percent of white-latex, 0.5 percent of CMC, 0.05 percent of twelve alkyl phenyl sulfonic Natrium, 0.02 percent of ortho octa hydrin, and the binder is 6%PVA, NaF is except, the perfect position of pouring is at the bottom of casting.

适合该工艺的颗粒粘结剂为质量分数为6％的PVA水溶液，最好的浇注方式为底注，并且在铸渗层合金粉末中不使用NaF熔剂。

By taking ortho-hexahedron as the basic form of abrasive grains that are distributed randomly on the grinding wheel base, the model of virtual grinding wheel is built. Mathematic model of interference between the abrasive grains and the workpiece is given.

以正六面体作为磨粒的基本形态，并将该磨粒随机分布在砂轮基体上，建立虚拟砂轮的仿真物理模型以及磨粒与工件接触的数学模型。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。