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。
To synthesize the octreotide, Phe-Leu-Glu-Glu-Leu and C_(15)H_(31)-CO-Lys-Thr -Thr-Lys-Ser peptides, the strategies are as followings: Fmoc- group as protective group for α-NH_2; TBTU, DIEA and HOBt as coupling reagent; and ethanedithiol -phenol - thioanisole - H_2O - TFA (2.5:5:5:5:82.5, V/V) as cleaving solution.
采用Fmoc固相合成法，以苯并三哗四甲基脲四氟硼酸盐、二异丙基乙胺和1-羟基苯骈三氮唑为缩合剂；苯酚—乙二硫醇—苯甲硫醚—水—三氟乙酸(5：5：2.5：5：82.5，V/V)为切割试剂，合成了奥曲肽、Phe-Leu-Glu-Glu-Leu及C_(15)H_(31)-CO-Lys-Thr-Thr-Lys-Ser三种小分子多肽，并对奥曲肽的合成规模进行了放大。
There are many reasons for This phe-nomenon appearing, but writer's behavior of writing assistance (writers who wrote articles to make a living) was the key aspect.
出现这种现象的原因很多，其中文人尤其是佃文谋生的布衣文人的代耕行为，是一个关键因素。
Methods A high fibrinolytic enzyme was purified with (NH4)2SO4 fractionation and sephadex G-100 gelfiltration chromatography, and characterization was investigated by check the enzymatic activities in different conditions.
枯草芽孢杆菌培养，利用(NH4)2SO4沉淀、Sephadex G-100 柱层析对该酶发酵液进行分离纯化，利用四肽底物Sue-Ala-Ala-Pro-Phe-PNA作为底物，研究酶的理化性质。
Three strains (designated as RMRC SCN1, RMRC SCN2 and RMRC SCN6) of thiocyanate degrading bacteria and one strain (designated as RMRC PHE1) of phenol degrading bacterium were isolated from oil-water interface of rain-sewage storage tank of petroleum refinery.
自炼油厂雨污水贮槽内油水界面油泥中，筛选出3株硫氰酸盐高效率分解菌(RMRC SCN1、RMRC SCN2、RMRC SCN6)及1株高效率分解菌(RMRC PHE1)。
So lots of analogues were synthesized in order to overcome this disadvantage. The best known is the octreotide. In particular, the ~(111)In-DTPA-D-phe~1-octreotide is clinically established for diagnostic imaging of neuroendocrine tumours. Though these compounds have prolonged the biological half-life in a way, most of such analogues couldnt remain the high affinity to all of SSTRs.
人们通过改变氨基酸序列，引入非常规氨基酸等方式，研究合成了大量生物半衰期相对较长的生长抑素类似物，放射性核素标记的奥曲肽、兰若肽已在临床用于生长抑素受体阳性肿瘤的诊断和治疗，其中~(111)In标记的DTPA-D-phe~1-octreotide作为第一个获美国FDA批准的多肽类放射性药物，已广泛用于生长抑素受体阳性肿瘤的诊断。
Higher concentration of PHE inhibited soil biological activity, and in turn the effect of soil biology on PHE degradation.
黑麦草对土壤中多环芳烃有较强的忍耐性，但过高的菲浓度对黑麦草的生长有影响。
The results indicated that chlorine demand and CF yield of Tyr were much higher than those of Ala and Phe based on the same chlorination conditions, which indicated that Tyr was an important precursor of CF.
研究发现，在同等氯化反应条件下，由于侧链基团的不同，Tyr的耗氯量以及CF产率都明显高于Ala和Phe，从而说明Tyr确实是一种重要的CF前体物质。
RESULTS An increase in H2O2 levels, thiobarbital acid reactive substance and protein carbonyls, and reduction in reduced glutathione level, activities of superoxide dismutase, catalase and glutathione peroxidase; and total antioxidative capacity in the brain of fetal rats were observed 4 d after Phe treatment. In contrast to these effects, decreased H2O2 and O-2 levels, normal activities of antioxidative enzymes and GSH level in fetal brain were seen in MT treated rats.
结果 妊娠期染毒Phe导致胚胎脑组织H2O2水平升高，脂质过氧化和蛋白质氧化产物增加，超氧化物岐化酶、过氧化氢酶和谷胱甘肽过氧化物酶活性下降，总还原型谷胱甘肽含量及总抗氧化力降低。
Nga Phe Chaug is the biggest and oldest monastery on the Inle Lake and is worth visiting for its historical purposes and architecture as well as its cats.
衙前苯丙氨酸巧是最大和最古老的修道院的茵莱湖，是值得一游的宗旨和历史建筑以及它的猫。
The results of fluorescence measurements show that there is a strong interaction between Py-Phe-DA and BSA.
该单体与牛血清白蛋白反应的荧光光谱结果表明它们之间可发生相互作用。
This paper introduced the manufacturing methods of phe-fiberglass mesh emulsion coating.
本文介绍了苯丙型玻璃纤维土工网格布涂层乳液的制备方法。
From optical studies, the photoionization of aromatic amino acids produced radicals and hydrated electron, and the interaction of tyrosine and phenylalaninewith SO*-4 radical yields predominantly the corresponding one-electron oxidized radicals. However, with tryptophan, it is proposed that the SO*-4 radical interacts predominantly via addition reaction with the indole moiety to produce the C(2)-yl sulphate radical adduct.
三者不同之处是，Trp和Tyr光电离分别生成氮中心的吲哚自由基和酚氧自由基；丙酮光敏化除生成上述自由基外，在敏化Trp光解体系还观察到Trp激发三重态，丙酮三重态与Phe没有作用；在SO*-4单电子氧化体系，分别在Trp的吲哚环、Tyr的苯环上加成生成加成产物，其中Trp尤为显著；Phe的光电离与SO*-4氧化体系结果一致。
In native cyt c to 5〓 or more in Im-cyt c. There was a rearrangements of Tyr67 relative to Leu64 and Leu68 in imidazole cytochrome c. Tyr74 ring moved toward Lys73 side-chain from the original position near the 50s and 60s segments. The side chain of Leu68 made its close approach relatively to Phe82. NOE data suggested that Phe82 still located inside the immediate vicinity of Lys13 residue. Ile85 had moved relatively to Leu94 and Te2 after imidazole substitution.
血红素丙酸区的部分残基对Met-80的取代较为敏感，为了容纳外源配体Im，Trp-59，Tyr-67，Tyr-74这三个芳香族残基的芳环间的相对位置发生了重排。cyt c键合Im后，Trp-59环离开Thr-40，Gln-42残基朝Leu-35，Arg-38移动，与Tyr-67，Tyr-74的芳环的间距由原来的小于4.5 A变到大于5.0 A；Tyr-67芳环朝Leu-64移动；Tyr-74环已经离开原来靠近50s，60s片断的位置，移向Lys-73的侧链质子。
In the tensional situation, peoples strain will be magnify and bring many harms to body, and it also can diminish ability of judgement and rational behavior. Pubic panic may lead to the disorder of society, even to a social crisis, which will be not good for the controlling of PHE.
心理张力过高会带来一系列的危害：对生理健康不利，个体判断力与理性行为能力下降，群体恐慌会导致社会秩序混乱，甚至演变成一场社会危机，不利于突发公共卫生事件的应对控制。
In this research, two derivatives of the dipeptide Ala-Phe were synthesized in frozen aqueous systems in the yield of 95% and 89%, while the yields were 20% and 16% in aqueous solutions at room temperature.
在-20℃，两个Ala-Phe衍生物的合成产率可分别达到95%和89%；而在25℃，相应的肽合成产率则分别为20%和16%。
Gislaved Gummi AB (www. ggab. se) is the global market leader in the field of gasket manufacturing for PHE-Gaskets.
Gislaved Gummi AB是全球生产热交换垫片领域的领袖，目前在瑞典及斯里兰卡均设有工厂。
The word `Synalèphe` refers, in Greek language, to the notion of `elision`; it aims in `helping to join or to assemble different elements so that their fusion creates a new entity.
塞纳弗」源自古希腊文，有「重整某些不同之元素，以揉合出新的整体」的含意。
Result:There is one mutant site in the fragment of the second primer of ESR: A→G, it lead aminoacid change: Arg→His, both pig and wild boar are all have no BB genotype individual, but thefrequence of B gene of wild boar is more higher than pig`s. There is two mutant site in thefragment of the first primer of FSHβ: C→T, G→A, it lead to amino acid change: Phe→Ser, Ala→Thr, they all have three genotype except shuangjitun has no AA. There is one mutant sitein the fragment of the third primer of FSHβ:C→T, no amino acid change, so I think there isno difference in three pig breeds. There is two mutant site in the fragment of the third primerof LH: T→G, C→T, no amino acid change, no difference. There is two mutant site in thefragment of the second primer of PRLR: C→T, no amino acid change, T→C it lead to aminoacid change: Val→Ala, the result of statistical analysis is hybrid pig have no BB, CC genotypeindividual, wild boar have no BB genotype, pig all have, but the individual of BB, CC arelittile, too. Taking one with another, it is different in this fragment of PRLR gene among thesepig breeds. There is one mutant site in the fragment of the third primer of RYR1: C→T, noamino acid change, no difference. Take into account whole, there is some difference in the fivegene of part sequence among wild boar, pig and hybrid pig.
结果：ESR第二对引物扩增的片段存在一个点突变 A→G，导致氨基酸 Arg→His 的变化，在家猪和野猪中均不存在 BB 型个体，但野猪中 B 基因的频率明显高于家猪的；FSHβ第一对引物扩增的片段存在两个点突变 C→T，导致氨基酸 Phe→Ser 的变化，G→A 的突变导致氨基酸 Ala→Thr 的变化；基因型检测结果，除双肌臀不存在 AA 型个体外，三种基因型在各个猪种内都有分布，不存在差异；FSHβ第三对引物扩增的片段存在一个点突变 C→T，无氨基酸变化，因此认为不存在差异；PRLR 第二对引物扩增的片段存在两个点突变 C→T 无氨基酸的变化，T→C 导致氨基酸 Val→Ala 的变化，统计分析的结果是杂种猪中没有 BB、CC 型个体，野猪中没有 BB 型，家猪中虽然都有，但是 BB、CC 型的个体也很少，但总的看来，这三者在 PRLR 基因的该片段上还是存在一定差异的；LH 第三对引物扩增的片段存在两个点突变，T→G、C→T，无氨基酸的变化，不存在差异；RYR1 第三对引物所扩增的片段存在一个点突变 C→T，无氨基酸的改变，三者不存在差异。
The liver tissue was stained with both hematoxylin-eosin and picrosirius; The severity of liver disease based on the score of necrosis and inflammatory reaction and fibrosis was assessed in liver biopsy specimens by a skillful pathologist and by image analysis system.
每位临床受试者给予100mg 13C-phe，禁食12h，研究多项试验参数在健康受试者和各级肝硬化患者间的差异，以及试验参数与临床生化指标和Child-Pugh计分的相关性。