酰氨

Result s:10 μmol/L retinoids could inhibit the Bel-7402 proliferation and decrease the colony forming of liver cancer cells on soft agar significantly.So some biochemical markers indicating the proliferation status of liver cancer cells changed significant ly, including the significant activity increase of ornithine carbamyl transferase, tyrosine-α-ketoglutaric transaminase and alkaline phosphatase, the significant decrease α-fetoprotein secretion,γ-glutamyltranspetidase and aldolase activity.

结果：10μmol/L维甲酸显著抑制肝癌细胞增殖，并使肝癌细胞软琼脂集落形成率明显减少，使代表肝细胞分化的酶鸟氨酸氨基甲酰转移酶、酪氨酸-α-酮戊二酸转氨酶和碱性磷酸酶比活力明显升高，甲胎蛋白分泌量、γ-谷氨酰转肽酶和醛缩酶比活力明显下降。

Methods Gelators of N-lauroyl-l-alanine methyl esterand N-lauroyl-l-alanine ethyl esterwere synthesized with l-alanine methyl ester,l-alanine ethyl ester and lauroyl chloride as materials.

方法以l-丙氨酸甲酯盐酸盐、l-丙氨酸乙酯盐酸盐和月桂酰氯为原料，合成月桂酰-丙氨酸甲酯凝胶因子及月桂酰-丙氨酸乙酯凝胶因子，采用IR、1H-NMR、MS对其结构进行表征，并对其熔点、热稳定性、在各种植物油中的最小胶凝质量浓度、相转变温度等基本性质进行了研究。

The better reaction conditions are as follows: Reaction temperature is 40°C, Reaction time is 5 hour; the ratio of L - phenylalanine to acetic acid and N - formyl - L- aspartyl anhydrideis 1:10.2:1.1, Its yield is 95.4%.

在查阅文献的基础上，得到较优的α-L-天冬氨酰L-苯丙氨酸甲脂盐酸盐的合成方案，在甲醇一水体系中，N-甲酰-α-L-天冬氨酰-L-苯丙氨酸在浓盐酸的作用下60℃水解90分钟，后冷却到15℃加入浓盐酸在20～30℃保温反应96小时，进行甲脂化，形成甲脂盐酸盐，结晶析出。

Both the and DtV$ for the glycyl dipeptides increase with increasing molality of sodium acetate. The interactions between charged center or glycyl units of the peptide and ions dominate those between alkyl groups of the peptide and the ions. The interaction between the peptides and sodium acetate is mainly pairwise. The results were interpreted successfully by the cosphere overlap model.

结果表明：甘氨酰二肽的标准偏摩尔体积和标准偏摩尔转移体积均随乙酸钠浓度的增加而增大，溶液中离子与肽带电基团/甘氨酰基团(CH2CONH)之间的相互作用大于离子与肽的非极性基团间的相互作用，乙酸钠和甘氨酰二肽之间主要是对相互作用。

Firstly, a Ni complex 2 of glutamic acid Schiff base was formed in a 98% yield from chiral auxiliary 2-benzopheone (1) with nickel chloride hexahydrate and L-glutamic acid.

报道了一种采用谷氨酸席夫碱Ni配合物共保护L-谷氨酸α-氨基和α-羧基合成谷胱甘肽(γ-L-谷氨酰-L-半胱氨酰-甘氨酸)的新方法。

In a system consisting of 20% PEG 400 and 12% magnesium sulfate, the partition coefficient of PGA was less than 0.01, PGA almost completely partitioned into the magnesium sulfate-rich bottom phase. Meanwhile, the partition coefficient of cephalexin was 6.7, the partition coefficients of phenylglycine methyl ester and 7-ADCA were 1.5 and 1.2, respectively.

通过考察头孢氨苄、苯甘氨酸甲酯和7-氨基脱乙酰氧基头孢烷酸(7-ADCA)在ATPS中的分配行为建立了一个含20%PEG 400和12%硫酸镁的ATPS，在此体系中头孢氨苄的分配系数为6.7，苯甘氨酸甲酯的分配系数为1.5，7-ADCA的分配系数为1.2，且青霉素酰化酶的分配系数小於0.01。

The glutamine synthetase produced by the engineering bacteria can specially act on NH4 and aminoglutaric acid, the durability to the high concentration ammonium ion has been distinctively improved because of the dissolution of adenosine acylation modification, the major bottleneck of glutamine with enzymatical production has been solved, and the concentration of the obtained glutamine can reach 47.6g/L.

本发明工程菌产的谷氨酰胺合成酶可专一性的作用于NH 4 和谷氨酸，且因解除了腺苷酰化修饰作用对高浓度铵离子的耐受能力显著提高，解决了酶法生产谷氨酰胺的重要瓶颈，生成的谷氨酰胺的浓度最高达到47.6g/L。

Through condensing o-aminobenzoic acid, ethyl oxalyl chloride and ethylenediamine(or 1,2-propylenediamine), two new ligands N-benzoato-N′-(2- aminoethyl)oxamido(H3oxbe) and N-benzoato-N-(2-amino-2-methylethyl)oxamido(H3oxbt) have been synthesized. Their mononuclear complexes Na·1.5H2O and Na·1.5H2O have also been obtained.

2以邻氨基苯甲酸、草酸乙酯酰氯和乙二胺(或1，2-丙二胺)缩合制得了两种具有不对称草酰胺结构配体N-(2-苯甲酰基)-N&-(2-氨乙基)草酰胺(H3oxbe)和N-(2-苯甲酰基)-N&-(2-氨丙基)草酰胺(H3oxbt)，并得到了它们的单核配合物：Na·1.5H2O和Na·1.5H2O。

Densities of glycylglycine in sucrose-water mixed solvent have been measured at 288.15, 298.15 and 308.15 K by Anton Paar DMA55 vibrating-tube digital densimeter. The apparent molar volume VΦ, limiting partial molar volume , partial molar volumes of transfer Δtrs from water to sucrose-water mixed solvent and the hydration numbers Nh for glycylglycine have been calculated.

利用Anton Paar DMA55精密数字密度计测定了288.15， 298.15和308.15 K甘氨酰甘氨酸在蔗糖-水混合溶剂中的密度，计算了甘氨酰甘氨酸的表观摩尔体积VΦ和极限偏摩尔体积，得到了其由纯水溶剂转移至混合溶剂中的迁移偏摩尔体积Δtrs 和理论水化数Nh。

Firstly, phenyliodine diacetate was immobilized to the 2% cross-linked polystyrene or the liner polystyrene resin. The more iodine the resin had, the lower conversion to phenyliodine diacetate. We made our endeavor to extend the range of useful application of polystyrene supported phenyliodine diacetate in organic synthesis:(1) the reagent was used as an effective reagent of carbonyl regeneration from oximes and semicarbazones of ketones.(2) the reagent was also applied to the synthesis of 1, 3, 4-oxadiazoles, 1, 3-disubstituted-2-pyrazoline, 2-arylbenzoxazole from aldehyde N-acylhydrazones, aldehyde hydoazones and phenolic Schiff's bases respectively.

首先，我们以2％交联的聚苯乙烯和线性的聚苯乙烯树脂为载体，制备了聚合物负载的二醋酸碘苯，通过研究发现：(1)聚苯乙烯二醋酸碘苯是酮肟、缩氨脲有效的去保护试剂，不仅芳香酮，脂肪酮和α，β不饱和酮的肟、缩氨脲也能顺利转化为相应的酮，实现酮基的再生；(2)我们还利用此试剂，分别与醛的N-酰基苯、N-酰基苯腙及邻羟基芳亚胺反应，在温和的条件下发生成环反应，以良好的产率生成1，3，4-噁二唑、吡唑啉和二取代苯并噁唑等杂环化合物；(3)聚苯乙烯二醋酸碘苯还可有效地将邻羟基芳酮的酰腙经氧化、重排成1，2-二酰基苯。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了