查询词典 Ad

The investigation of the catalytic activity and stereoselectivity of ligand 10 was also carried out under another standard set of K〓Fe 〓 conditions (〓/ligand/substrate=0.002: 0.01: 1). The AD reaction of seven olefins gave corresponding diols in 72～99% yield (except for ethyl cinnamate, 48%) and 91～99% ees, which was comparable to those obtained from the reactions using the commercial ligand 〓PHAL.

将单季铵盐手性配体10用于AD反应的另一个催化体系〓BuOH-H〓O/K〓Fe〓中考察其催化活性和立体选择性，在七种烯烃的AD反应中，〓、配体与底物的摩尔比为0.002：0.01：1时，化学产率为72～99％（肉桂酸乙酯除外，为48％），ee值为91～99.9％，与商品配体〓PHAL的催化结果相当。

So it is a effective prescription of protecting and treating AD.In our experiments, the model ras were administered D-gal intraperitioneal injection and β-Amyloid protein fragment_(1-40) into hippocampus. Mean well we used the technique of optical lens、 electron microscope、 immunohistochemical method, biochemistry and molecular biology.We studied the mechanisms that DR pretect and treat AD from the aspects of apoptosis、 inflammation injury、 oxidative injury 、 cholinergic neuron injury and the behavior experiments at cellar and molecular level.

本实验复制了D-gal腹腔注射合并Aβ_(1-40)海马定向注射AD动物模型，运用光、电镜技术及免疫组化、生物化学及分子生物学等先进检测方法，从行为学及细胞、分子水平探索地黄饮子对过氧化损伤、胆碱能损害、炎症损伤、细胞凋亡等相关调控因素影响的作用机制。

Electrotherapy could decrease the escape latency time and mistaken times,improving the learning and memory ability of AD rats.

电针能使AD大鼠在水迷宫实验中逃避潜伏期和错误次数减少，使AD大鼠学习记忆能力得到一定程度的恢复。

S.aureus not only may aggravate and exacerbate inflammation of lesions in AD by secreting exotoxin withsuperantigenic properties, but they may also function as an allergen, as the level of toxic-specific IgE correlates with the severity of AD.

细菌感染因素，尤其是金葡茵感染或定植在 AD的发病中起着重要的作用；金葡菌不仅可分泌多种具有超抗原特性的纠。

The routing algorithm is the fundamental and most important issue for the wireless communications in ad hoc network.

路由算法是Ad Hoc网络的重要组成部分，是建立Ad Hoc网络的首要问题。

The results above suggest that there was the hypothyroid in brain tissue of AD model.

本研究结果表明：在AD模型中存在甲状腺激素代谢紊乱，主要表现为脑组织中甲状腺功能不足，是由于〓-脱单碘活性降低所致，这种酶活性降低的原因推测是AD模型胆碱能系统损害后引起脑内自由基增多而致。

However it is not suitable for multi-and high-speed Ad Hoc networks for the incurrence of serious over-interference area and poor performance in such environment. A scheme is proposed to solve this problem, which includes Adaptive-RTS and Adaptive-CTS at both sender and receiver side.

我们提出了一种适合多速率高速Ad Hoc网络的自适应RTS／CTS握手机制，来解决多速率MAC协议在Ad Hoc网络中的大干扰区问题和性能低下问题，该自适应过程包括发送端的自适应RTS机制（Adaptive RTS，A-RTS）和接收端的自适应CTS机制（Adaptive CTS，A-CTS）。

It is very important to set up an ideal model of AD to observed the change of pathology in olfactory systerm.

为了观察AD嗅觉系统的病理改变在疾病发生发展中的作用，建立一种理想的AD模型十分重要。

Excitotoxicity resulting from overstimulation of NMDA-type glutamate receptors may contribute to AD, providing a rationale for blocking these receptors.

对NMDA型谷氨酸受体的过度刺激引起的兴奋性中毒可能与AD也有关系，这是阻断这些受体以治疗AD的原理所在。

With the popularization of Ad-Hoc, the policy of Ad-Hoc is become more and more important.

随着网络的发展和应用的普及， Ad-Hoc 的应用策略问题也显得越来越重要。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。