酪氨酸

The composition of amino in feed matter and feed draff after degradation for sixteen in rumen compared, from which we found the content of vary of amino acids in peanut meal and Soybean meal had increasing trends after sixteen hours cultured in rumen. The increasing trends of leucine, isoleucine, threonine, phenylalanine were greater. The increase trends of lysine, methionine, arginine and histidine were smaller. The content of varies of amino acid in cotton seed meal matter had decreasing trend s after sixteen hours cultured in rumen, but decreasing value was small. The compositions of amino acid in lees and rape seed meal matter were steady after sixteen hours cultured in rumen.

通过把饲料原料中氨基酸的组成和瘤胃降解16h后饲料残渣的氨基酸组成比较发现各种蛋白质饲料瘤胃降解前后氨基酸组成均发生了一定的变化，总的来说，氨基酸浓度在降解后有上升趋势(p＜0.05)的有亮氨酸、异亮氨酸、苯丙氨酸、缬氨酸、苏氨酸、丙氨酸和脯氨酸，氨基酸浓度在降解后有下降趋势(p＜0.05)的有赖氨酸、精氨酸、谷氨酸和胱氨酸，氨基酸浓度在降解后差异不显著的有组氨酸、天门冬氨酸、甘氨酸，降解后无明显规律的有蛋氨酸、丝氨酸和酪氨酸。

We discuss how this observed tyrosine loss correlates with the expansion of tyrosine kinases in the evolution of the metazoan lineage and how it may relate to the optimization of signaling systems in multicellular animals.

我们探讨随着多细胞生物进化中酪氨酸酶的日益壮大这些发现的酪氨酸是如何损失的，及在多细胞生物中酪氨酸是如何有效利用信号通路的。

Tyrosine binding occurred also under the condition of 4℃ for 10min or when the transportation of tyrosine into the cells was inhibited by ouabain.

用哇巴因抑制酪氨酸向细胞内的转运后，〓-酪氨酸的特异结合依然存在，放射菌酮也不能影响〓-酪氨酸结合。

At the same time,in the yogurt酪氨酸regarding alleviates the human body which the psychological pressure oversized,is highly anxious and anxious initiates exhaustedly has the very big help.

同时，酸牛奶中的酪氨酸对于缓解心理压力过大、高度严重和焦虑而引发的人体怠倦有很大的帮助。

At the same time, in the yogurt 酪氨酸 regarding alleviates the human body which the psychological pressure oversized, is highly anxious and anxious initiates exhaustedly has the very big help.

同时，酸奶中的酪氨酸对于缓解心理压力过大、高度紧张和焦虑而引发的人体疲惫有很大的帮助。

Erve growth factor can combine with its" receptor (one of tyrosine protein kinase receptor coded by proto - oncogene tyrosine kinase, TrkA), Causing the molecule of receptors to gather on the cell surface, and the tyrosine protein in cytoplasmic domain may be activated, three tyrosine base in the kinase domain of its" receptor and two tyrosine base at other domain be phosphated, thus, phosphated tyrosine receptor kinase became the bracket which absorb all kinds of connective proteins and kinases.

GF与其酪氨酸受体激酶受体(由原癌基因trk编码的一种酪氨酸蛋白激酶受体，TrkA)相结合，引起受体分子在细胞表面发生二聚体化，然后受体细胞内结构上酪氨酸活性被激活，使受体自身结构中位于激酶结构域的三个酪氨酸残基及在此结构域外的两个酪氨酸残基发生自身磷酸化，这样，磷酸化的酪氨酸受体激酶A便成为吸收各种连接蛋白质和酶的支架。

In the first experiment, CL cells were incubated with 〓-tyrosine at 24℃ for 45 min. The binding of 〓-ty- rosine to the CL cells reached saturation at 12 μM of 〓-tyrosine con- centration.

将黄体细胞与〓-酪氨酸一起孵育（24℃，45min）后，〓-酪氨酸能与黄体细胞特异结合，〓-酪氨酸浓度为12.5μM时达到饱和，在4℃孵育10min的条件下仍有〓-酪氨酸的结合。

The inner reorganization energy and the exothermicity of the reaction are then determined. Closed shell HF SCF calculations have been carried out for the systems Tryptophy1-Tyrosine and Tyrosyl-Tryptophan for different values of R, and the Koopmans^,theorem is invoked to estimate the energy level splitting A.From the obtained A~m~i~n, the values of electron transfer matrix element V~D~A are determined to be 0.96kJ. mol^-^1 and 0.87kJ.mol^-^1 for Tryptophyl-Tyrosine and Tyrosyl- Tryptophan, respectively.

对色氨酰酪氨酸和酪氨酰色氨酸体系进行闭壳层HF自洽场计算，按Koopmans定理计算体系分子轨道分裂能值A，在R约为0处发现了A的极小值，从而获得色氨酰酪氨酸及酪氨酰色氨酸体系分子内电子转移的电子转移矩阵元V~D~A分别为0.96kJ.mol^-^1和0.87kJ.mol^-^1。

Results: Good linearity was observed in 6～1512μmol.L-1 range for phenylalanine, the intra-run and inter-run imprecisions w ere 3.68%and 4.01%, the recovery rate was 98.6%; good linearity was observed in 5.4 ～1380.0μmol.L-1 range for tyrosine, the intra-run and inter-run i mp recisions were 1.87%and 2.59%, the average recovery rate was 98.9%.

酪氨酸的线性范围为5.4～1380μmol.L-1，最低检测浓度为0.7。μmol* L-1，平均回收率98.9%，批内CV为1.87%，批间CV为2.59%。健康儿童血清苯丙氨酸浓度为(61.4±10.8)μmol.L-1，血清酪氨酸浓度为(131.8±28.0)μmol.L -1。健康成人血清苯丙氨酸浓度为(69.3±8.6)μmol.L-1，血清酪氨酸浓度为(83.6±9.4)μmol.L-1.4例苯丙酮尿症患儿的血清苯丙氨酸浓度为1296～1759μmol.L-1，血清酪氨酸为29.5～53.5μmol.L-1。

The experimental results show that in the presence of acetic anhydride, the L-tyrosine can be completely racemized and converted into DL-tyrosine both in NaOH aqueous solution and in acetic acid solvent, and moreover, in the presence of acetic anhydride

今讨论了在碱性水溶液中，L-酪氨酸、乙酸酐和NaOH三者摩尔比例对消旋过程的影响和在纯乙酸溶剂中，乙酸用量和L-酪氨酸与乙酸酐的摩尔比例与消旋温度对消旋过程的影响。结果表明在乙酸酐的作用下，L-酪氨酸在纯乙酸溶剂中的消旋具有消旋速度快，DL-酪氨酸收率高的优点。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。