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The construction of branched-chain sugar was carried out by hydroboration-oxidation of a double bond in the corresponding hexose.

通过相应的烯糖9的硼氢化-氧化反应构建了支链糖11,同时分离到一系列还原的副产物7c-e,通过X-射线晶体衍射确定了7c和7e新的手性中心的构型。

By using HST-100 high speed tribometer,the friction couple of different materials can be tested under high speed and electric current .

我们研制了 HST-100型高速载流摩擦磨损试验机,其主要性能完全满足模拟高速铁路实际工况下的速度、载荷及电流等参数的要求,能够对不同材质的摩擦配副材料进行高速工况条件下的载流摩擦磨损试验。

From the study, it is higlighted the importance of the effect of the land-sea distrution and topography on the formation and varitaion of the SH, and it is generally improved our knowledgement on the formation of the global subtropical climate pattern.

本项目的研究提高了我们对海陆分布和地形在副高形成和变异中的重要性的认识,从总体上加深了对全球副热带气候型形成的了解。

Based on the investigation of the transesterification between dimethyl sebacate and 1,2,2,6,6-pentamethyl-4-piperinol, the synthetic technologies of Tinuvin292 and Tinuvin 765 were established. The two kinds of hindered amine light stabilizers were obtained in the yield of 93.3% and 92.4% respectively and qualified as the advanced level of the kindred overseas products.2. The synthetic technology of Tinuvin123 was studied and established. Using 2,2,6,6-tetramethyl-4-piperinol as the starting material, the product was synthesized successfully through oxidation, free-radical reaction and transesterification in overall yield of 57.6%.

本文研究建立了三个受阻胺类光稳定剂的合成工艺,探索了聚合型受阻胺类光稳定剂生产过程中不溶性副产物产生的原因,并设计、合成了一系列具有抑菌活性的新型受阻胺类光稳定剂。1、在研究癸二酸二甲酯与1,2,2,6,6-五甲基哌啶醇的酯交换反应的基础上,建立了受阻胺类光稳定剂Tinuvin292、Tinuvin765的合成工艺,分别以93.3%和92.4%的收率得到了光稳定剂Tinuvin292、Tinuvin765,所得产品质量达到了国外同类产品的水平。2、研究建立了受阻胺类光稳定剂Tinuvin123的合成工艺。

The synthetic technologies of three hindered amine light stabilizers were established, the reason for the insoluble side products formed in the production of polymerized hindered amine light stabilizers were studied, and a series of novel hindered amine light stabilizers with antibacterial properties were designed and synthesized in this present paper.1. Based on the investigation of the transesterification between dimethyl sebacate and 1,2,2,6,6-pentamethyl-4-piperinol, the synthetic technologies of Tinuvin292 and Tinuvin 765 were established. The two kinds of hindered amine light stabilizers were obtained in the yield of 93.3% and 92.4% respectively and qualified as the advanced level of the kindred overseas products.2. The synthetic technology of Tinuvin123 was studied and established.

本文研究建立了三个受阻胺类光稳定剂的合成工艺,探索了聚合型受阻胺类光稳定剂生产过程中不溶性副产物产生的原因,并设计、合成了一系列具有抑菌活性的新型受阻胺类光稳定剂。1、在研究癸二酸二甲酯与1,2,2,6,6-五甲基哌啶醇的酯交换反应的基础上,建立了受阻胺类光稳定剂Tinuvin292、Tinuvin765的合成工艺,分别以93.3%和92.4%的收率得到了光稳定剂Tinuvin292、Tinuvin765,所得产品质量达到了国外同类产品的水平。2、研究建立了受阻胺类光稳定剂Tinuvin123的合成工艺。

Yanbian region lies in the eastern segment of north margin of North China slab, situating on the intersect point of North China, Sibiric and the pacific slab. Space and boundary of these slabs controls the Mesozoic volcanic-subvolcanic rock distribution, which restricts the epithermal-porphyry gold metallogenic series. Though many research of deposits have been done individually, the synthesize works are few.

中文题名延边地区浅成低温热液-斑岩型金成矿系列副题名外文题名 The epithermal-porphyry gold deposit series in Yanbian region 论文作者梁俊红导师金成洙王建国教授学科专业矿产普查与勘探研究领域\研究方向学位级别博士学位授予单位东北大学学位授予日期2002 论文页码总数112页关键词成矿系列金矿床延边地区馆藏号BSLW /2003 /P618.51 /1 延边地区处于华北板块北缘东段,正好位于华北板块、西伯利亚板块和濒太平洋构造三大构造区域之间的三联点处,三者所处的空间位置和边界条件,对延边地区的火山—次火山岩及与之有成生联系的金成矿系列的形成和演化起着明显的控制作用。

To obtain the tervalent fusion toxin gene, three toxin gene fragments from three species of Vibrio parahaemolyticus, Vibrio vulnificus and Vibrio mimicus were connected with the flexible linker using overlap extension PCR. The three toxin gene fragments respectively encode the mature proteins of the thermostable direct hemolysin of V. parahaemolyticus, the cytotoxin of V. vulnificus and the heat-labile hemolysin of V.

采用柔性Linker和重叠延伸PCR方法将三个毒素基因,即副溶血性弧菌的耐热型直接溶血素基因tdh、创伤弧菌的溶细胞毒素基因vvhA和拟态弧菌的热不稳定型溶血素基因vmhA的成熟蛋白基因片段进行串联,得到三联融合毒素基因tdh-vvhA-vmhA。

In a typical scenario, users might be using MS Outlook in their office; on the road, they might be using a laptop or Pocket PC for a quick check without the risk of creating multiple, unsynchronized copies of incoming messages.

在一个典型的情况下,用户可能会使用MS观在他们的办公室;论道,他们可能会使用笔记型电脑或Pocket PC ,可提供快速入住,没有风险,创造多方面的,同步的副本来袭的讯息。

Several tens of superlarge hydrothermal gold deposits related to volcano subvolcanic rocks have been defined in the world since 1980s. It is of great importance, both economically and theoretically, to study this type of gold deposits. The newly discovered Jinchang gold deposit, Heilongjiang Province, is one of this type of gold deposits, which is hosted by breccias bodies that are associated with volcano-subvolcanic rocks. More than 30 t Au resource has been proved after preliminary exploration by the 5〓 Geological Party of Gold Headquarter.

中文题名黑龙江省东宁金厂金矿床综合地质异常及找矿评价副题名外文题名 Comprehensive geological anomaly and exploring evaluation of the Jinchang gold deposit,Dongning,Heilongjiang province 论文作者朱成伟导师崔彬教授学科专业矿物学、岩石学、矿床学研究领域\研究方向成矿系列与成矿预测学位级别博士学位授予单位中国地质大学学位授予日期2001 论文页码总数75页关键词金矿床金厂金矿综合地质异常找矿评价馆藏号BSLW /2003 /P618.51 /5 80年代以来,国内外发现的与火山-次火山有关的浅成热液型特大型金矿床数十处,具有很大的工业价值和找矿前景,对该类型金矿进行深入研究具有重要的理论和实际意义。

And fill in 3 of the pump noise to rub pair in influencing the axial column of the Model 63CY14-1B: With mix oil friction , variable head and slippery friction , column of boots of record fill in with column friction to fill hole cylinder block.

而对于影响63CY14-1B型轴向柱塞泵噪音的3个摩擦副:缸体与配油盘的摩擦、变量头与滑靴的摩擦、柱塞与柱塞孔的摩擦。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。