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We hope that the formation of biazulene compound(201), under the coupling reaction of 1、3-position being along with electron-withdrawing group, 2-position being along with hydroxy group, and four 4、8-position being along with static energy obstacle large enough functional group of azulene compound(200), may have the chiral auxiliary effect like that of the BINOL.

希望将两个在1、3-位置上有拉电子基、2-位置上有羟基及在4、8-位置上有立体能障够大的官能基之薁类化合物(200),进行偶合反应后所形成的双薁类化合物(201)能够像BINOL那样具有掌性辅助剂之效果。

There are 23 species and 3 varieties Orobanche plants in China,most of which are distributed over north,northwest and northeast.The compounds of Orobanche were reported at phenylethanoid glycosides such as acteoside and isoacteoside,and acteoside has significantly protective againstα-galactose induced hepatic injury,which is better than Biphenyl dicarboxylate.

第一部分紫花列当化学成分及生物活性研究紫花列当Orobanche coerulescens Steph为列当科列当属二年生或多年生寄生草本植物,性温、味甘,生长于沙丘、干草原、砾石沙地和戈壁之中,寄生在菊科蒿属植物的根上,具有补肾、强筋之功效,用于肾虚、腰膝冷痛、阳痿遗精和神经官能症等疾病的治疗。

Then,the core molecule was used as a coupling agent to condensate with polyethylene glycolsof different molecular weight or polyethylene glycol monomethyl etherin the presence of stannous octoate as catalyst and diphenyl ether as azeotropic agent to remove water.

在辛酸亚锡催化下,以二苯醚为共沸脱水剂,将三官能度小分子TMP-SK3作为偶联剂,进一步与不同分子量的端羟基聚乙二醇和聚乙二醇单甲醚缩合,减压下共沸脱水,制备了以TMP-SK3为核,PEG或PEGm为臂的三臂星形大分子。

Osteoarthritis is a degenerative disease that disunites the extra cellular matrix of articular cartilage and is arduous to cure because cartilage is a complex and nonvascular tissue. Treatment of OA has targeted modifiable reagent to be the connective tissue structure-modifying agents and disease- modifying osteoarthritis drugs, such as hyaluronic acid or modified tetracycline.

退化性关节炎是一种缓慢渐进式的退化性疾病,目前治疗关节炎药物的研究重点,在於进一步修饰已知传统药物之官能基,使其成为具有改善连结组织结构以及减缓关节炎症状之药物。

However, the relationship between the radiological findings, pain and dysfunction remains unclear.

然而,在放射线学的调查结果,痛苦和官能不良之间的关系保持不易了解。

Results indicated that semidried mei preserved by reused brine or regenerated salt have higher values in acid, soluble solids, and salt contents than those prepared from fresh salt. However, there is no significant difference in sensory evaluation. These results implied that the reuse of waste brine is feasible.

研究结果显示以废液再腌渍的梅胚在可滴定酸含量、可溶性固形物含量、盐度等方面均较高,但官能品评方面则无明显差异,因此将废盐液重复使用於梅胚腌渍的构想初步可行,且再生盐亦可於二次腌渍时利用。

The invention relates to condensation products comprised of cyclic carboxylic acid anhydrides of dicarboxylic acids, tricarboxylic acid anhydrides or tetracarboxylic acid anhydrides and difunctional polyamines, especially polyoxyalkylene amines.

本发明涉及由二元羧酸的环状羧酸酐、三羧酸酐或四羧酸酐和二官能化多胺,特别是聚氧化烯胺制备的缩合产物。

Esophageal varices are a common source of UGB, especially in patients with liver dysfunction and chronic alcoholics.

食管varices是UGB的一个共源极,特别是在有肝脏官能不良和慢性酒客的患者。

n thes paper, the oligomers with different molecular weight of monohydroxylpolyethersulfones were synthesized in solution and the optimum condition ofpolymerization was obtained; With phase transfer catalyst method,the oligomerswas obtained and transformed to monovinylpolyethersulfones macromer. Its structure was characterized with IR and 1H-NMR.

本文采用溶液法以单酚(4-氯-4'-羟基二苯砜)为原料合成了不同聚合度的单酚低聚体,得到了控制聚合度的最佳聚合条件;用相转移催化剂法成功地将单酚转化为单烯大分子单体,并用IR、1H—NMR对其结构进行了表征;测定了双键官能度均在1.90以上。

The same lethargy, I am afraid, characterizes the use of all our faculties and senses.

我担心同样的冷漠也存在于我们对自己官能和意识的运用上。

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Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来,英国,在此地早期居住的是凯尔特人,已经被征服了三次。

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