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A silver ion selective electrode was prepared and characterized with trimethylene bis (N-ethyl-N-phenyldithiocarbamate) as ionophore.

制备并考察了以双（N-乙基－N-苯基氨基二硫代甲酸）1，3-丙二醇酯为载体的银离子选择电极的性能。

First, N'-(4-aminophenyl)-N'-4-(5-phenyl-1,3,4-oxadiazol-2-ylphenylbenzene-1,4-diamine was prepared and polymerization was carried out by direct polycondensation with a series of dianhydrides to obtain polyimides containig triphenylamine units in the main chain and 1,3,4-oxadiazole moieties as pendent group.

首先合成新型双胺N'-(4-aminophenyl)-N'-4-(5-phenyl-1，3，4-oxadiazol-2-ylphenylbenzene-1，4-diamine后，与一系的芳香族二酐进聚缩合反应，可制得一系列三苯胺为主链且1，3，4-恶二唑为侧链的聚醯亚胺。

The structural and electronic analysis indicates that the GeCNN (5) possesses a conjugate triply bonded structure |Ge≡C—N≡N|.

几何和电子结构分析表明， GeCNN (5)具有共轭三键结构： Ge≡C—N≡N：。

Tobacco mosaic virus, a member of alphavirus-like superfamily, the N-terminal truncated TMV helicase formed hexamer and exhibited double strand RNA unwinding activity. Accordingly, we also constructed the same N-terminal truncated BaMV helicase-like domain and analysis the capability to unwind double-strand RNA.

在同属於alphavirus-like superfamily的Tobacco mosaic virus之解螺旋蛋白的分析中，其N端的截断蛋白会形成六聚体，而且具有解旋活性，因此我们同样建构了许多类解螺旋酵素N端的截断蛋白，测试其蛋白质的聚集形式及解旋活性。

METHODS: We randomized 42 healthy parturients in early laborto receive 0.1% ropivacaine + fentanyl 2 g/mL eithervia PCEA+BCI (n = 21,bolus 5 mL, lockout 10 min, basal infusion5 mL/h) or via PCEA+AMB (n = 21, patient-activated bolus of5 mL, lockout 10 min, basal automated boluses of 5 mL/h [omittedif a patient-activated bolus was successfully administered inthe last 1 h]) after successful induction of combined spinalepidural analgesia.

我们将42名处于早期产程的健康娠妇女在成接受腰硬联合镇痛后，随机分为两组，一组接受 PCEA+BCI (n = 21，单次给药5ml ，锁定时间 10分钟，背景剂量5 mL/h)，另一组接受 PCEA+AMB (n = 21，患者自控单次给药5 mL，锁定时间 10 分钟，背景剂量自单次给药5ml/h)，两组均给予0.1%的罗哌卡因+太尼2 g/mL 。

Its structure was determined by a combination of MALDI-TOF MS ana lyses, N-terminal Edman degradation and amino acid analyses. Amino acid sequenc e of VAPP was: N-terminus VLSAADKSNVKAAWGKVGGNAPAFGAEALLRM.

结合激光解析电离飞行时间质谱，N-端Edman降解和氨基酸分析结果表明，该多肽是由32个氨基酸残基组成的直链多肽，分子量3 216 u，主要含缬氨酸、丙氨酸、赖氨酸和甘氨酸，无半胱氨酸，其一级结构氨基酸排列顺序为：N端-VLSAA DKSNVKAAWGKVGGNA PAFGAEALLRM，与已知蛋白序列同源性远小于50%。

After stratification (myoma size, number of myomas,and surgeon), patients were randomized to either laparoscopy( n = 19) or laparotomy ( n = 21) and received a standardizedanesthesia and patient-controlled analgesia for 24 h after surgery.

在对肌瘤大小、数量和手术医生分层后，病人被随机分在腹腔镜组（ n = 19）或剖腹组（ n = 21），并且接受标准化的麻醉和术后24小时的病人自控镇痛。

Penicillin G sulphoxide is esterified by N,N′-bistrimethylsilyl urea under the temperature 55℃ with a molar ratio 2.5∶1 between BSU and sulphoxide,and the ester obtained is ring-enlarged in the toluene under refluxing with the exist of catalyst-pyridine acetyl bromide.

摘 要 本文在制得青霉素G亚砜的基础上，完成了重排酸的扩环反应，重点探讨了扩环反应的最优化条件。青霉素G亚砜与N，N′-双脲在55℃下反应，得到亚砜的酯化物。

N The Air Transport Users Council in the UK called for the publication of "name and shame" league tables for airlines around the world in order to lead a drive for improved performance.

n \n \n英国航空运输用户委员会呼吁，编制一份包括全球所有航空公司&丑行&的排行榜，敦促它们改善服务。

A yield of 88% for TMH can be obtained by using the optimized synthetic conditions as follows: molar ratio of formaldehyde to octylaldehyde 4.5: 1.0, molar ratio of sodium hydroxide to octylaldehyde 1.4: 1.0, aldol condensation temperature 35℃ and time 240min Cannizzaro reaction temperature 55℃ and time 180min.

结果表明，优化的合成三羟甲基庚烷的反应条件是，n／n=4.5，n/n=1.4，羟醛缩合反应温度和时间分别为35℃和240min，康尼扎罗反应温度和时间分别为55℃和180min，摩尔产率可达88%。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐