易经

Herein, we report the enantioselective total syntheses of slagenins A-C and their antipodes. Starting from readily available ethyl -4-chloro-3-hydroxy-butanonate, elongation of the carbon chain with diazomethane, followed by oxidation of the given α-diazoketone using distilled DMD, afforded a key intermediate α-ketoaldehyde .

本文从方便易得的-4-氯-3-羟基-丁酸乙酯出发，经重氮甲烷延伸碳连、DMD氧化相应的α-重氮酮，制得α-酮醛；该化合物与尿素在氢氟酸作用下，以协同方式非对映选择性的直接构建了cis-四氢呋喃并[2，3-d]咪唑啉-2-酮双环结构，进而合成了天然产物slagenins A、B、和C的对映体。

For the production of double boiler industry cycloid arc Gear series, double-arc cycloid involute gear tooth series, double cycloid arc Gear three series reducer is the slowdown in industry experts examine bodies comprehensive demonstration of the industry Reducer various features of the design of new models, it has a reduction ratio, low noise, high efficiency, long life, small size, light weight, style, new structure is simple, reliable transmission, less power consumption, easy operation and maintenance, and other characteristics, Is designed for the boiler industry with stereotypes products.

专为锅炉行业生产的双摆线圆弧齿齿轮系列，双摆线圆弧齿渐开线齿轮系列、双摆线圆弧齿行星三轮系列减速机是经减速机构行业专家考查论证综合各行业各种减速机特点设计的新机型，它具有减速比大、噪音低、效率高、寿命长、体积小、重量轻、样式新颖结构简单、传动可靠、耗电少、易操作维修等特点，是专为锅炉行业配备的定型产品。

The micro mold after forming of electroform needs the increasing thickness process which inset in the block and supports the micro mold during the injection modeling. Otherwise, the buffer layers could prevent the problems of stresss and surface deterioration.

然而微模具在电铸成形后需经增厚处理，因为增厚处理使非常薄的微模具与模具基座较易配合，也将提供微模具於射出成形过程中之支撑，一般增厚制程会在微模具与增厚层间加入一缓冲层避免应力与表层变质造成之问题。

A better understanding of the role of PPAR in insulin action system will be critical in developing more efficacious and safe agent s that act on PPAR and benefit patients with type 2 diabetes. The main content is followed: Synthesis and analysis of 1,3-dicarbonyl compounds. Make use of easily available cheap reagent such as 2-naphthol, 6-hydroxyquinoline, 1,2-dibromoethane, 4- hydroxybenzaldehyde, dimethyl malonate, 2-{4- [(2-napthoxy)ethoxyl] benzyl} malonates and 2-{4 [(1,2,3,4-tetrahydro-6 -quinolinoxy)ethoxyl] benzyl } malonates were synthesized through 6-8 steps in virtue of Williamson, Knoevenagel reaction, Pd/C catalyzed hydrogenation with mild conditions and high yield. The total yield of 40-50%.

本论文的主要内容和研究结果如下： 1，3-二羰基类化合物的合成及分析，采用2-萘酚、6-羟基喹啉、1 ，2二溴乙烷、对羟基苯甲醛、丙二酸二甲酯等常见易得试剂，利用Williamson反应、Knoevenagel反应、钯碳加氢等条件温和且收率高的方法，分别合成了2-{4- [(2-萘氧)乙氧基]苄基}丙二酸衍生物和2-{4 [(1，2，3，4-四氢-6-喹啉氧基)乙氧基]苄基}丙二酸衍生物两个系列8个化合物，经6-8步反应，总收率为40-50%，具有一定绿色化学特性。

The election, however, still required the confirmation of the seven remaining gentes, and only then was the new sachem ceremonially invested with his office by the common council of the whole Iroquois confederacy.

不过选举须经其余七个氏族确认，只有在这以后，当选为酋长的人才正式就职，就职仪式则由全易洛魁联盟的总议事会举行。

The glazed by the high-tech products processing, easy to clean.

该产品的釉面经高技术处理，易清洗。

It seems that preparation from hexafluoroacetone through Grignard reaction has superiorities as facile raw materials, simple operation and so on.

认为以六氟丙酮为原料经格氏反应制备六氟-2-甲基异丙醇具有原料易得、操作简便等特点，值得进行深入研究。

Two technology including nitrocarburizing process and salt nitrocarburzing process haver been adopted. Several conclusions were obtained: firstly, nitrided layers consist of two layers including the outer white layer, mainly ε and γ′ with favorite errosion resistance, the inner dark layer consist of α-Fe.

再往里为扩散层，扩散层与原始组织无明显区别，是过饱和含氮的α-Fe固溶体，比原始组织更易受腐蚀；(2)试样经长时间氮碳共渗后，渗层最表面会出现疏松，这是因为Fe原子向外扩散，在ε相内造成Fe原子空位，空位向内扩散，并可能在晶界上或某些晶体缺陷处堆积，以致造成空洞。

Premature infants with bronchopulmonary dysplasia have difficulty during oral feeding because of insufficient respiratory function. Stress signs with oxygen desaturation, hyperpnea, and bradycardia are common observed during oral feeding.

罹患肺支气管发育不良(bronchopulmonary dysplasia， BPD)早产儿，因其呼吸功能障碍，经口餵食时易产生血氧饱和浓度下降、呼吸过速、心搏迟缓等压力症状。

The leafstalk and stem are facile induced to relaxed callis, and it could be the original of suspension culture by subculture many times. Its content of resveratol is influenced by the different parts of plant and culture condition.

葡萄叶柄和茎易被诱导产生松散的愈伤组织，且经多次继代可以用于建立悬浮培养体系；葡萄愈伤组织中的白藜芦醇含量随外植体及培养基组成的不同而有所差异。

I can still vividly recall the impressive scenes you gave. You were among my friends and relatives who accompanied me from my house to the seaport and when the porters were slow to show up, you obligingly carried my suitcase for me.

你对我的种种感人情意，使我记忆犹新，那天你随着我的亲友从家里送我上轮船，搬运工迟迟不来，你毅然替我提着皮箱上船。

St. Nicholas became the patron saint of Russia, where he was famous for his red cape, flowing white beard, and bishop's mitre.

圣尼古拉成了俄罗斯人的守护神，在那里，他以身披红斗篷，留着飘逸的白胡须，戴着主教法冠而闻名。