色氨酸

In the second part of this dissertation, we studied the stereoselectivity of the Pictet-Spengler reaction of D-tryptophan methyl ester with piperonal and the synthesis of tadalafil.

在本论文的第二部分，我们研究了D-色氨酸甲酯和胡椒醛发生Pictet-Spengler反应的立体选择性和他达那非的合成。

We discovered that the best stereoselectivity of the Pictet-Spengler (cis/trans=92:8) was obtained, when the reaction of D-tryptophan methyl ester II-33 with piperonal II-34 in acetic acid was catalyzed by benzoic acid at room temperature.

我们发现室温下在冰醋酸中，D-色氨酸甲酯II-33和胡椒醛II-34在苯甲酸催化下，发生Pictet-Spengler反应的立体选择性最高， cis：trans的比例为92： 8。

The Pictet-Spengler reaction of D-tryptophan methyl ester hydrochloride II-42 with piperonal II-34 in various solvents was extensively studied. The best stereoselectivity (cis/trans=99:1) was obtained using nitromethane or acetonitrile as the solvent.

我们研究了在不同溶剂中，D-色氨酸甲酯盐酸盐II-42和胡椒醛II-34发生的Pictet-Spengler反应的立体选择性，发现当分别用硝基甲烷和乙腈做溶剂时反应的立体选择性达到最高， cis：trans的比例为99： 1。

TDFPS has been applied to the study of fluorescent properties of ethidium bromide, pyrene and tryptophan in various environments.

运用三维荧光偏振光谱法研究了溴化乙锭、芘和色氨酸在不同环境中的荧光特性。

If continuous work makes you insomina,you shoud drink a cup of milk before sleeping,and eat some sweet food,which contains tryptophan that can go into cerebra with the function of hypnosis,and make you have a good sleep to benefit you refight.

如果连续的工作是你失眠，可在睡觉前喝一杯牛奶，吃几块甜点，其中含有的"色氨酸"能进入大脑起催眠作用，让你睡个好觉以利再战。

The lac operon is an inducible operon, whereas the trp operon is a repressible operon.

乳糖操纵元是可诱导的操纵元；色氨酸操纵元是可阻遏的操纵元。

This will cause tryptophan in your blood to enter the brain, where it is metabolized into serotonin.

这会使你血液中的色氨酸进入大脑，在那里代谢成血清素。

Skatole ( 3-methylindole ) which has strong odour is metabolic product of tryptophan in human and animals. It also exists in many food we take ( e.g some meat).

粪臭素即3-甲基吲哚，有极强的粪臭味，是人和动物体内色氨酸的代谢产物，人摄取的很多食物中本身也含有粪臭素。

Free tryptophane, docosoic acid and methyl 14-methy pentadecanate were isolated and identified as monomeric compounds also for the first time from Panax plants. Malonyl-ginsenoside 〓, ginsenoside Ro,〓, Re,〓,〓,〓(8 saponins) and stigmasterol were isolated and identified for the first time from the fruits and molonyl- ginsenoside 〓 was also the first from the plant of panax quinquefolium.

游离色氨酸、二十二碳酸及14-甲基-十五碳酸甲酯是首次从人参属植物中分离鉴定的杂环α-氨基酸和脂肪羧酸类单体化合物；丙二酸单酰基人参皂甙〓、人参皂甙〓及豆甾醇是西洋参果中首次分离鉴定的8种单体皂甙和1种甾醇化合物，M-〓亦为西洋参中首次分离鉴定的皂甙化合物。

N-bromosuccinimide and N-ethylmaleimide were used to modify the trptophan residues and sulfhydryl groups respectively in the main component α-Ⅲ of A.

4041α-淀粉酶的主要组分α－Ⅲ的色氨酸残基和巯基进行修饰。

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。