天冬氨酸的

On the basis of the instrumentation to study intact-receptor based on maxillary palp of cockroach Periplaneta Americana, a thermoplate was designed for constant temperature control during the experiment and a new electrode holder was also designed for improving reproducibility.

依响应频率将氨基酸分成了三类：响应频率最高的第一类为天冬氨酸、谷氨酸、甘氨酸和脯氨酸，其次为第二类包括组氨酸、精氨酸和苯丙氨酸，第三类为没有响应信号的包括丙氨酸、色氨酸、酪氨酸和苏氨酸等。

The major route of β-alanine production for pantothenate in Escherichia coli is through the α-decarboxylation of L-aspartate, which is catalysed by the enzyme L-aspartate-α-decarboxylase. The panD mutant of E. coli is β-alanine auxotrophy.

在大肠杆菌中，用于泛酸生物合成的的β-丙氨酸主要是由L-天冬氨酸α位脱羧而产生，这个生化反应由panD基因编码的L-天冬氨酸-α-脱羧酶催化。

The IR spectra indicated that the functional group—COO〓 in PASP linked to the surface of carbon steel. The pitting corrosion inhibition of tungstate and BTA on carbon steel and the passivation of carbon steel in solutions containing sodium borate were studied by the measurement of polarization curves and the curves of current vs.

失重法研究钨酸钠与聚天冬氨酸对碳钢的协同缓蚀效应发现，钨酸钠与PASP对自来水中的碳钢有协同缓蚀作用，加入锌离子可产生进一步的协同作用，碳钢表面分析表明：聚天冬氨酸是以羧基在碳钢表面成键。

Aspartic acid is the main constituent of total AA. After 100 days of storage at 37℃ and 50℃, aspartic acid loss is about 67% and 73% of the total AA loss, but the concentration of proline increases.

酥梨汁氨基酸的主要成分为天冬氨酸，37℃和50℃贮存100d时，天冬氨酸含量的减少占总氨基酸减少的67%和73%，脯氨酸的浓度上升。

Objective To explore effects of mutations in the tyrosine methionine aspartic acid aspartic acid motif of hepatitis B virus polymerase gene on lamivudine therapy.

目的 探讨乙型肝炎病毒多聚酶酪氨酸蛋氨酸天冬氨酸天冬氨酸基序变异对拉米夫定抗病毒疗效的影响。

The white low-density powder of the the sodium salt of polyaspartic acid was got by dropping the hydrolyzable solution to wiscked high speedly carbinol which Consumption amount is about 3-6 times to the amount of solution, the powders density is about 0.35g/ml.4 Polyaspartic acid was characterized by NMR and IR.5 The scale inhibition behavior of polyaspartic acid was studied and result shows: The calcium carbonate inhibition rate is up to 99% at the dosages of 12.5mg/ Land when pH value is 9.0, Ca2+ concentration is 120mg/L and HCO3- concentration is 366mg/L.6 The primary design was put forward for industrialized production of PASP.

在此工艺下得到聚天冬氨酸钠粉术，外观为白色的轻质粉术，堆积密度0.35g／ml，不用进行脱色和粉碎。 4。用红外光谱和核磁共振谱图对聚天冬氨酸进行了表征。 5。对合成的聚天冬氨酸钠对CaCO_3的阻垢性能进行了研究。结果表明：在Ca~(2+)离子浓度120mg/L(以碳酸钙计300mg/L)，HCO_3~-离子浓度为366mg/L(以碳酸钙计600mgL)，PH值=9.0的条件下，阻垢剂浓度达到12.5mg/L时阻垢率可达99％。

In this analogue, the hydrogen of amide group could still form a hydrogen bond with the oxygen of ester bond and the ester bond was isosteric with peptide bond.

我们合成了甜味肽的类似物L-天冬酰氨酰-L-α-羟基苯丙酸甲酯，将甜味肽的天冬氨酸替换为天冬酰胺，肽键替换为酯键。

The progress in the application of polyaspartic acid and its derivatives in scale inhibition,viscosity reduction,fertilizer synergism and super-absorbing networks were described in this article. polyaspartic acid ; synthesis ; scale inhibition ; viscosity reduction ; fertilizer synergia ; water-absorbing resin

聚天冬氨酸可以改变钙盐的晶体结构，是一种优良的阻垢分散剂，用于循环冷却水系统、锅炉及油气田水处理[1～3]；聚天冬氨酸具有良好的降粘作用[4]；聚天冬氨酸作为肥料增效剂，能促进植物生长[5，6]；它还具有优良的保湿性能，用于日用化妆品和保健用品的制造[7]；由聚天冬氨酸可制备高吸水树脂[8～10]；另外，由聚天冬

Ordinarily the reaction rate of amino acids is faster than that of glycols, but the carbon chain of ethylene glycol is very short, the reaction rate of L-aspartic acid was longer than that of ethylene glycol.

另外，丁二醇比乙二醇碳链长，位阻大，反应慢；通常氨基酸的反应速度要比醇快，但由于乙二醇的碳链很短，导致其比天冬氨酸的反应速度还快。

Effects of microwave power, reaction time, reaction temperature, solvent etc. on reaction were studied by a single factor tests. The results show that maleic acid is more active than fumaric acid; the introduction of methyl group on the double bond can weak the reactivity of the Michael addition reaction; the ester base is more propitious to complete the Michael addition reaction than the nitrile base.

为研究微波下迈克尔反应的规律，本文采用单模聚焦微波有机合成仪，通过对顺丁烯二酸、反丁烯二酸和氨水合成DL-天冬氨酸、顺式3-甲基丁烯二酸和氨水合成3-甲基天冬氨酸、丙烯酸甲酯和氨水合成β-丙氨酸、丙烯腈和氨水合成β-氨基丙腈等五个反应对迈克尔加成反应进行了研究。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。