保护基

The macro conjugated molecule fluorene derivative has 2, 3, 6, 7-tetraamino-9, 9'-dialkyl fluorene as a raw material which is added to an organic solvent respectively together with phenanthrenequinone, acenaphthene quinone or bis-carbonyl pyrene derivatives and strong base; under the protection of inert gas, reflux reaction is carried out to the materials, so as to prepare a series of trapezoidal conjugated molecules containing fluorine structures.

本发明涉及一类含大共轭分子的芴衍生物及其制备方法，大共轭分子芴衍生物是将原料2，3，6，7-四氨基-9，9'-二烷基芴，分别与菲醌、苊醌或二羰基芘的衍生物以及强碱加入到有机溶剂中，在惰性气体的保护下，回流反应制得一系列含有芴结构的梯形共轭分子。

Ellagic acid helps reduce free radical damage and protect the nuclei of cell DNA against damage.

柔花酸能有效对抗游离基，更深层保护细胞中的DNA。

The neuroprotectie effects of T-588 administration after agal nere aulsion and neurofunctional recoery after recurrent laryngeal nere crush were studied using motoneuron cell counting, ealuation of choline acetyltransferase immunoreactiity, the electrophysiologic examination, and the re-mobilization of the ocal fold.

本文采用运动神经元细胞记数、胆碱乙酰基转移酶免疫反应性、电生理学检查和声带再运动情况的方法来研究在迷走神经撕脱伤后T-588给药的神经保护作用和喉返神经挤压损伤后神经功能的恢复。

3Nm, modified with alkylamine and alkylthiol were prepared by a simple phase-transfer method using a small Pt nanocluster stabilized by glycol and OH〓 as a building block.

四、采用"非保护型"Pt金属纳米簇作为构筑基元，通过简单的相转移方法制备了长链胺和长链硫醇修饰的Pt纳米簇。

No obvious difference was observed when 6′-OH of isonucleoside was free or was protected by allyl group.

异核苷6′-OH处于游离和烯丙基保护状态时的结果没有显著差异。

At present, studies about function of ApoD expressed in vitro are still very little. A concentration-dependent manner of inhibition rate scavenging of hydroxyl radical and prevention nicking of the supercoiled DNA by recombinant BbApoD suggests that BbApoD probably takes part in antioxidation process in vivo widely.

目前，利用体外表达的ApoD蛋白直接测定其功能作用的研究还很缺乏，BbApoD重组蛋白对体外Fenton体系产生的羟自由基的抑制作用以及对DNA氧化损伤保护作用的浓度依赖性变化暗示了文昌鱼ApoD蛋白很可能也参与了体内的抗氧化过程。

Methods An oxygen free radical generation system FeSO4/ Ascorbic acid was used.

目的 观察氧自由基对线粒体的损伤以及牛磺酸的保护作用。

The roles of 〓-FDP was studied by using autoradiograph in cultrured myocardial cells.

FDP改善心脏功能、保护心肌细胞缺氧再给氧损伤的作用已被证实。作为能量基质可否直接进入心肌细胞参与代谢尚有许多争议。

Integrated with the design and the programming practice of the matching algorithms about LS MPP embedded computer used to image comprehension, this paper will analyze and study five problems about the SIMD computer which oriented to the application of image comprehension, they are how to reduce the number of memory instructions and their execute cycles, how many control register we require, how to protect the contents of the base address register, how to design the buffer and how to set up the date types of image array, etc.

本文结合 L S MPP嵌入式计算机图象匹配算法的设计与编程实践，对面向图象理解应用的 SIMD计算机减少存储类指令及其执行周期、控制寄存器的数量需求、基地址控制寄存器内容的保护、缓冲器的有关设计及图象阵列数据类型的设立等设计问题进行了分析和讨论，提出的一些设计思想对于面向图象理解的类似 SIMD计算机的设计具有较为重要的参考价值

Description :The new Tungsten based IF material has up to twice thestrength of the best impact resistant materials currently used inprotective armor applications such as boron carbide and siliconcarbide, and are over 5 times stronger than steel.

描述：基於IF 材料的新钨比现有使用的保护装甲材料如碳化硼和金刚砂拥有两倍的最好冲撞抵抗效果，是钢强度的五倍以上。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。