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The purpose of this paper is to synthesize some phosphonium salts with PPh3 and some chiral quaternary ammonium salts with L-Valine. And we also use L-Valine and L-Phe-OMe to synthesize a new type catalyst —2,5-diketopiperazine , the simplest compound of cyclo-peptide.

本文利用廉价易得的三苯基磷和手性L-缬氨酸作为起始原料，合成了几种普通季鏻盐和手性季铵盐，并且利用L-缬氨酸与L-苯丙氨酸甲酯反应，合成了一种新型的相转移催化剂——2，5-二酮哌嗪环类的化合物。

Methods Synaptosomes was made from hippocampus and incubated with artificial cerebrospinal fluid. 30μmol/L propofol, 50μmol/L picrotoxin or both was added into aCSF. Intralipid was administered as solvent control and any drugs was applied in control. To observe Ca~(2+)-dependent release of glutamate and GABA, dihydrokainic acid and nipectic acid were added into aCSF.

制备大鼠海马突触体，随机分为5组：PTX组加入印防己毒素使其终浓度为50μmol/L，Pro30+PTX组加入终浓度为30μmol/L的丙泊酚和50μmol/L的PTX，Pro30组加入终浓度为30μmol/L的丙泊酚，溶剂对照组加入脂肪乳，空白对照组不加入上述药物。

The results suggested that an addition of 10%-15% FCS,1-2 mg·L -1 17β E 2,20-50 mg·L -1 LH and 10 mg·L -1 FSH was effective to improve oocyte nuclear maturation,and to extrude the first polar body.

结果表明，添加体积分数为10％～15％的FCS，1～2mg·L－117β－E2，20～50mg·L－1LH和10mg·L－1FSH有利于提高卵母细胞核成熟，并放出第一极体。

The fiwww.yixuelw.cnrst polar body extrusion of mouse oocytes after 24 h of incubation in the presence of MXC (7.25 mg/L: 52.8%; 14.5 mg/L:44.4%;29 mg/L:22%) was significantly lower than than in the unexposed comtrol group (71.2%).

但在培养液培养24 h时PB1的排出率7.25 mg/L MXC组为52.8%，14.5 mg/L MXC组为44.4%，29 mg/L MXC组为22%，明显低于对照组的71.2%，差异具有统计学意义(P.05)。

Are preparatively cultured in the differentiation culture mediums(IBA 1 mg/L, BA0.4 mg/L) for two days, and AS is added in preparative culture medium and MSo bacterial liquid that has been centrifugated. The extents of colouration are not identical.

影响瞬时表达的因素很多，本实验主要对四个因素进行测试：预培养天数(1天、2天)、不同激素配比的分化培养(IBA 1.0mg/L BA 0.4mg/L、IBA 0.2mg/L BA 2mg/L)、是否加入乙酰丁香酮、外植体类型(子叶、真叶、下胚轴、根)。

Total average quantity of Phytoplankton is 687.56×10^4ind/L, and biomass is 8.888 3 mg/L; Zooplankton belong to 4 Phylums-31 Genus or Species, protozoon and rotifer have the most quantity (77.67%), Copepoda have the most biomass (1.193 0 mg/L), total average quantity of Zooplankton is 270.690ind/L.

浮游动物共4类31个种属，数量上以原生动物、轮虫为主，占77.67%，生物量桡足类最大，为1.1930mg/L，浮游动物总平均量为270.690ind/L。

In addition,the rapid development of resistance to chemical insecticide by psocids has also been reported.In China,the commonly occurred psocid species are Liposcelis bostrychophila,L.entomophila,L.decolor,and L.paeta.

在我国发生为害最为严重的种类有嗜卷书虱Liposcelis bostrychophila、嗜虫书虱L.entomophila、无色书虱L.decolor以及小眼书虱L.paeta等。

As the para- sitoid was treated with 10 mg/L, 20 mg/L and 40 mg/L chlorfluazuron in adult stage, pupation and developmental duration of their offsprings were not affected.

寄生蜂成虫直接经10mg/L、20mg/L和40mg/L氟啶脲处理后，均对后代结茧和发育历期等无显著影响。

However, the cell wall cultured at high concentration of Cu2+(10～200 mg/L) was clearly thickened and became multiple layers, and the pigment decreased and the pyrenoid became one or disappeared. Low concentration of Cu2+(0.01 mg/L, 0.1 mg/L) did not affect the growth of Chlorococcum sp., but the growth became slow and even negative beyond the concentration of 0.1 mg/L.

与对照BG11培养的绿球藻比较，0.01～1 mg/L Cu2+浓度下培养的绿球藻，细胞壁无明显增厚，色素没有多大变化，但蛋白核由一个变为多个；而在高浓度(10～200 mg/L Cu2+)下，细胞壁明显增厚为多层，色素减少，蛋白核减少并回复到1个或消失。

But for breed Ganlenblue, the Callus-generated and motage ratio of quickset there were no significantly difference between 50 mg/L GGR treatment and contrast.

不同激素处理中，浓度为50 mg/L的GGR激素处理有利于粉蓝插条的成活和生根，其插条愈伤组织产生率和生根率分别比对照提高42.5和33.33个百分点；浓度为50 mg/L的GGR处理对园蓝插条愈伤组织产生率和生根率最佳；100 mg/L的GGR激素处理有利于品种杰兔插条的成活和生根，其插条愈伤组织产生率和生根率分别比对照提高10.83和7.5个百分点。25mg/L的GA有利于品种S13插条的成活，其愈伤组织产生率比对照提高36.66%，但是插条扦插生根率仅比对照提高10%；100mg/L的GGR对品种S13插条产生愈伤组织没有效果，其插条愈伤组织产生率与对照无显著差异，但是有利于插条生根，其插条扦插生根率比对照提高21.66个百分点。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。