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Methods The effects of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine and 7-nitroindazole (7-NI) on nitric oxide synthase activity, levels of dopamine、3,4-dihydroxyphenylacetic acid、homovanillic acid, and TH-immunostained postive nerve fibres in the striatum of mice were determined by using colorimetic analysis, HPLC with electrochemical detection, and immunohistochemical analysis.

用比色分析、高效液相色谱电化学及免疫组化法检测1-甲基-4-苯基-四氢吡啶和7-硝基吲唑(7-NI)对C57BL小鼠纹状体一氧化氮合酶活性,多巴胺、二羟基苯乙酸、高香草酸水平和酪氨酸羟化酶免疫阳性神经纤维的影响。

The dissertation mainly consists of two parts:1. The Reaction Chemistry of Alkynes under Palladium Catalysis Part 1 studies the reaction α,β-unsaturated carbonyl compounds with alkenylpalladium intermediate generated by nucleopalladation, and discovered 1 the Pd-catalyzed tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls,2 the four-component tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls, 3 the tandem intramolecular oxypalladation-conjugate additionreaction of alkynoic acids with α,β-enals. These new reactions provide notonly efficient highly stereoselective methods for the synthesis of γ,δ-unsaturated,polyunsaturated carbonyl compounds and γ-lactonic aldehydes, but also thebasic transformations for a number of C-C bond formation reactions which can be usedto design synthesis of many acyclic, cyclic or polycyclic compounds.

本论文的主要工作分为两个部分:一、钯催化下炔烃的反应化学在本小组前人工作的基础上,我们详细研究了炔烃亲核钯化产生的烯基钯中间体与α,β-不饱和羰基化合物的反应,发现两价钯催化下卤离子-炔烃-α,β-不饱和醛酮的串联加成反应、卤离子-炔烃-α,β-不饱和醛酮的西组分串联加成及炔酸分子内氧钯化-串联Michael型加成反应;由此发展了γ,δ-不饱和醛酮、多不饱和羰基化合物和带有醛酮基侧链的γ-丁内酯衍生物的高立体选择性合成方法,这一过量卤离子存在下的烯基钯对α,β-不饱和羰基化合物共轭加成反应的发现,为大量碳-碳键形成反应的实现提供了基础,使我们能够从这一基本反应出发,设计和开发多种分子内、分子间的碳碳成键反应,以好的立体、区域选择性组建开链、环状及多环类型的化合物。

Cases are attributed to lumbarization. Most of this cases have backleg pain more or less.

结果 6例为腰椎骶化,10例为骶椎腰化,多有不同程度的腰腿痛。

In the depth surpasses in 10 meter deep well nitrogenation oven technique of manufacture, applied the multi-link graduation to enter the ammonia active nitrogen atom weaken compensation method, caused the nitrided uniformity distinct enhancement.

在深度超过10米的深井氮化炉制造技术中,应用了多环分级进氨气活性氮原子衰减补偿法,使氮化均匀性明显提高。

Fourteen unreported N-substituted piperidin-4-one oxime ethers derivatives were synthesized withsubstituted benzylamines or phenethylamine as raw materials via a series of Michael addition, Dieckmann condensation, hydrolysis decarboxylation reactions, oximation a...

以取代苄胺或苯乙胺为起始原料,依次经Michael加成,Dieckmann缩合,水解脱羧,肟化和醚化等多步反应合成了14个未见文献报道的N-取代哌啶酮肟醚衍生物。

This research utilizes the method of organic synthesis to put different amount of aminophenol into hydroxybenzoic acid or caffeic acid so as to produce a series of high yield of polyhydroxy benzamides (1~40).Through the following different activity tests, discussing the applied value of cosmetics.Ⅰ.

摘要 本研究主要利用有机合成方法,将具有不同数量及在不同位置之羟基取代之安息香酸及咖啡酸分别与胺基苯酚化合物进行醯胺化反应,得到一系列高产率之多酚醯胺类衍生物(1~40),经由下列不同活性测试方法,探讨其化菻~上的应用价值。

A series of ABEPS were synthesized from long chain fatty acids, benzene, polyglycol and 1, 3-propane sultone by the procedure of Friedel-Crafts acylation, Huang-Minlon reduction, Williamson and sulfonation reaction, and these compounds had never been reported in the past time.

以长链羧酸、苯、多缩乙二醇和丙烷磺内酯为初始原料,依次经Friedel-Crafts酰基化反应、Huang-Minlon还原、Blank反应、Williamson成醚以及磺化反应等过程,合成了系列未见报道的ABEPS。

A new system design based on the conception of SOC is also given. Processing and tracking algorithms. Put forward some IR image algorithms by analyzing the characteristics of IR image such as: low contrast、ununiformity、wide gray dynamic range.

在红外图像处理算法方面,分析了焦平面红外图像具有的低信噪比、宽图像动态范围及图像非均匀性等特性,结合实际硬件条件,提出了直方图归一化、去冗余灰度均衡、受限空域锐化、多帧平均等处理算法,在实际应用中取得良好效果。

More and more people have been interested in information granulating since the problem was firstly proposed and discussed in the world by L.A. Zadeh.

从1979年L.A.Zadeh在世界上首次提出并讨论了模糊信息粒化问题之后,信息粒化得到人们越来越多的关注。

Besides being well designed, Python is also well tooled for modern software methodologies such as structured, modular, and object-oriented design, which allow code to be written once and reused many times.

除了是精心设计的,Python也使用了现代软件方法,如结构化,模块化,面向对象设计,使代码写一次,可重复使用多次。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力