查询词典 protecting group

Starting form chitosan,amidogen protecting,cross linking,etheration,amination,amidogen release and addition reaction with CS_2,and chitosan derivative containing dithiocarbamate group was firstly prepared.

本文在课题组前期关于淀粉改性重金属捕集剂研究工作的基础上，参考国内外的相关文献，建立了以壳聚糖为主要原料制备二硫代氨基甲酸改性壳聚糖重金属捕集剂的合成工艺。

For protecting the anonymousness of the sender as well as to provide the authentication,an ID-based ring signature scheme suited for distributed and collaborative design system is proposed based on GDH group.

分布式协同设计[1-2]是网络化制造的核心技术，指分布在不同地域的产品设计人员，通过互联网对制造资源异地交互，相互协同地设计和开发产品。

In order to resolve these questions, we try to find some new protecting group which could be used in the preparation of such unstable nucleotides analogues.

对于一些寡核苷酸的类似物，由于它们在某些化学环境下的不稳定性而使它们的合成具有一定的困难，为了解决这些问题，人们一直在开发新的保护基，以消除这些副反应的影响，更方便地制备这些化合物。

These three groups show the lowest willingness to pay for the fee of increasing the government's tax revenue. The groups of mass consumption and positive concernment show the highest willingness to pay fee for the use of education in ecological. The group of protecting environment shows the highest willingness to pay for the fee of interpreter's salary. The groups of protecting environment and positive concernment show the difference between the fees of ecological preservation. The groups of mass consumption and positive concernment show the difference fees of ecological education. The group of positive concernment shows the highest willingness to pay fee to the use of interpreter's salary, ecological preservation, increasing governments' tax revenue, and the use about ecological education.

研究结果发现此三集群游客均对於支付解服务费用作为增加政府税收之愿付价格为最低；「大众消费」及「热衷投入」集群均对於支付费用作为生态保育经费之愿付价格最高，「保护环境」集群则对於支付费用作为解员薪资之愿付价格最高；「保护环境」和「热衷投入」集群对於支付费用作为生态保育经费有显著性差；「大众消费」和「热衷投入」集群对於支付费用作为生态教育费用亦有显著性的差；「热衷投入」集群对於支付解服务费用作为解员之薪资、生态保育经费、政府税收和教育经费的愿付价格均是三集群中最高。

Constituting dicycle; 2. region selectively reducing six-membered ring ketocarbonyl radical; 3. introducing 7alpha-hydroxy group; 4. Aldol reaction to introduce side chain and obtain 8alpha-hydroxy group; 5. oxidizing the position 7 hydroxy group into ketone; 6. turning the configuration of the position 7 hydroxy group; 7. glycosidating the position 7 hydroxy group; and 8. eliminating protecting group to obtain the target compound.

该方法包括如下步骤：(1)双环的构建；(2)区域选择性还原六元环酮羰基；(3)7α-羟基的引入；(4)Aldol反应引入侧链，同时得到8α-羟基；(5)7位羟基氧化为酮；(6)7位羟基构型的翻转；(7)7位羟基的糖苷化；(8)脱除保护基得到目标化合物。

ERαhad a weaker expression inraloxifene of 1mg/kg/d with estradiol valerate of 0.02mg/kg/d group than the othergroups 1 Raloxifene combined with different estradiol dosages hasdemonstrated the same protecting effect on bone as raloxifene alone. Combinedadministration does not decrease the protecting effect. 2 Raloxifene combined with different estradiol dosages has not demonstratedstimulatory effect on uteri and breasts and has maintained normal aorta structure.

1雷洛昔芬和不同剂量雌激素配伍对去卵巢大鼠的股骨效应与雷洛昔芬相同，两种药物合用不减弱对骨的保护作用。2雷洛昔芬和不同剂量雌激素配伍对去卵巢大鼠的子宫和乳腺无刺激性，能够维持主动脉内皮和平滑肌的正常形态和功能。

The E-TOF will also be feasible and practical to assist chemists in screening the optimal reaction condition or evaluating the overall efficiency of different catalytic systems for a specific asymmetric reaction.4.For the first time,we explored chiralγ-hydroxy-α,β-acetylenic esters,which were prepared via asymmetric alkynylation,as key intermediates to the synthesis of chiralγ-butyrolactones. This convergent and enantioselective approach to chiralγ-butyrolactones is practical and easily handled with protecting group free.

这一概念包括反应产率、对映选择性、配体用量以及反应时间四个重要反应参数，不仅适用同一反应不同催化体系的横向综合性评价，而且适用于某一特定反应催化体系的优化过程，有助于研究人员选择最佳的反应条件。4、我们发展了以手性γ-羟基-α，β-炔酸酯为关键中间体完成了手性γ-丁内酯类天然产物的对映立体选择性全合成，该关键中间体能够以我们的催化体系方便的对映选择性合成，之后的官能团转换方法成熟，易于操作，无需进行繁琐的官能团保护和脱保护过程，绿色经济。

C. In addition, they introduced a fluorosubstituted benzylic ester (CH 2 C 6 H 4 CH 2 CH 2 C 8 F 17 ) as a protecting group in solution-phase peptide synthesis to facilitate the purification of intermediates by fluorous-solid-phase extraction.

丙此外，他们推出了fluorosubstituted苄酯(丙6小时2楚楚242丙的CH8六17)为保护群液相肽合成纯化中间体的便利氟-固相萃取。

Methods: 60 cases of chronic severe hepatitis were divided into observe group and control group randomly, 30 cases in respectively. Control group was treated with routine approaches comprised of liver protecting, kata-ALT, detoxicating and albumin supplementing, et al, at the same time, adding colon herbs dialysis to the cases of observe group with HC-3000 therapeutic machine. At first, intermittence lavage using coloclysis solution at the depth of 50cm, 60min, then infund 100~200ml herbs colon dialysis solution constituted by rhubarb, acori graminei, semen raphani, dandelion, oyster and cornu bubali, at al, remaining 1~2h, biw, continuous 4wks. Observe the amelioration of primary symptoms, physical signs and complications in all of the cases, as well as the change of liver function, prothrombin time and the contents of blood ammonia.

60例慢性重型肝炎患者按分层随机配对分为观察组和对照组各30例，对照组给予常规护肝、降酶、退黄以及补充白蛋白等支持治疗，观察组在基础上加用HC-3000结肠途径治疗机透析治疗，每次先用结肠灌洗液间歇灌洗60min，深度50cm，然后注入由大黄、石首蒲、莱菔子、蒲会英、牡蛎、水牛角等组成的中药结肠透析液100~200mL，保留灌肠1~2h，每周2次，连续4周后观察患者主要症状、体征及并发症的改善情况，同时检测治疗前后肝功能(TBil、ALT、ALB、CHE)、凝血酶原时间和血氨(NH3)等指标。

Objective To research effect on tendon healing and adhearing after tendontransplanted with vascular vessel and protect paratenonMethods 30 rabbits were regarded as study objects ,the double Achillestendons were cut off and anastomosd in 24 ,the left Achilles were anastomosedwith protecting paraneton and circulation under microscope as theexperimental group; the right Achilles were handled as the left exceptresecting the peritendineum as the control group; the another 6 as thenormal group without any surgical intervene. All the animals wereimmobilized with plaster 3 weeks.

目的 研究吻合血管、保留腱膜肌腱移植对肌腱愈合及粘连影响方法以30只健康中国白毛红眼兔为实验动物，双后肢自身对照，实验组取左后肢于镜下保护好腱周血供，在腱周组织表面用尖刀片轻柔作一约0.5cm切口，挑出一束跟腱刀片横断，3-0无创缝线改良Kessler法缝合，再间断缝合腱周组织；对照组取右后肢，游离并切除腱周组织，余操作同实验组；空白组：不予任何外科干预。

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。