查询词典 stilbene

On the one hand, one benzen ring of stilbene was substituted by one pyridine ring for the purpose of evaluating the bioactivities of azastilbenes. On the other hand, some stilbene derivatives with different substituents in different sites were designed for the study of SAR.

一，以吡啶环替代母核的一个苯环，考察分子中引入氮原子对活性的影响；二，改变母核上的取代基类型及取代位点，考察取代基在构效关系中的影响规律。

The maximal absorption wavelength of the nitro-stilbene derivatives with an ether bond exhibited approximate 30 to 40 nm bathochromic shift compared to that of nitro-stilbene dyes with an ester bond.

相对于酯键而言，通过醚键连接的对硝基二苯乙烯类分子的最大吸收波长有一个大约30至40 nm的红移现象。

In the presence of different sensitizers, we measured the rate of photoisomerization of t-stilbene to cis-stilbene as a method for evaluating the efficiency of these compounds.

本文还测定了存在不同敏化剂时，芪的顺、反异构化反应速度，以此评价化合物的敏化效率。

The annulation of stilbene compounds were studied. Phenanthrene derivates-interme diates of tylophorine were synthesized by annulation from-2,3-bis(3,4-dimethoxyphen yl)acrylic acid and-2,3-bis(3,4-dimethoxyphenyl) acrylonitrile with phenyliodine diace tate as a friendly and high efficient catalyzer.The route was first reported, whose application foreground would be promising.The catalyzer will be used to study of synthesi- zing a series of new phenanthrenes.

本文还探索了简单类化合物关环反应，并研究出用廉价高效对环境友好的催化剂-二乙酸碘苯成功地将类化合物－3，4-二甲氧基-α-(3，4-二甲氧苯基)-肉桂酸和-2-(3，4-二甲氧苯基)-3-(3，4-二甲氧苯基)-丙烯关环形成相应的菲环衍生物－娃儿藤碱重要中间体，此方法在国内尚属首次，具有重要的应用价值，此外可用此催化剂研究一系列类化合物的关环反应。

In-vivo neutron and gamma spectra of depleted uranium sphere and vanadium sphere under central D-T neutron source were measured,with a 18 mm×20 mm stilbene crystal detector, at 7,10,13,16,19,22 cm away to the center in 45° direction in depleted-uranium sphrer, and 1.8,4.8,8.3 cm away to the center in the 0° direction in V sphere.

为获得介质内中子能谱及伴生γ能谱的实验数据，在中心D-T中子照射下，用18 mm×20 mm的茋闪烁体探测器，测量了与D+束成45°角的水平方向距球心7、10、13、16、19、22 cm位置处贫化铀球介质内的中子能谱和伴生γ能谱，以及钒球内与D+束成 0°角、距离球心1.8、4.8和8.3 cm处的中子能谱和伴生γ能谱。

OBJECTIVE: To investigate the effect of stilbene glucoside on hypoxia-reoxygenation injury of human umbilical vein endothelial cells.

目的：观察二苯乙烯苷对人脐静脉血管内皮细胞缺氧/复氧损伤是否具有保护作用。

Stilbene glucoside protects HUVECs against hypoxia-reoxygenation injury, which has superior therapeutical effect to that of prevention.

二苯乙烯苷对血管内皮细胞缺氧复氧损伤具有明显的保护作用，而且其治疗作用优于预防作用。

The intervention experiment was divided into the control, hypoxia-reoxygenation and stilbene glucoside groups, with each group were repeated for 6 times.

采用人脐静脉血管内皮细胞建立缺氧复氧损伤模型，干预实验分为8组，每组重复6次。

Resveratrol is a naturally occurring stilbene found in a limited number of unrelated plant species such as giant knotweed rhizome,grape,peanut or pine.

Res及其糖苷只存在于有限的植物之中，如虎杖、葡萄、花生、松树等。

The two-photon absorption properties of 4,4′-bis stilbene synthesized recently are calculated at ab initio level.

对最近实验室合成的分子材料4，4＇二甲氨基二苯乙烯的双光子吸收特性在从头计算的基础上进行了理论研究。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。