查询词典 salicin

The enzyme follows typical Michaelis-Menten Kinetics with apparent Km of 3.40mmol/L for Salicin. The activation energy of the enzyme is 50.63KJ/mol.

测定该酶的最适反应温度为43℃，最适反应pH为5.1；在pH5.1，45℃下，该酶催化水杨素水解的Km值为3.40mmol/L，活化能为50.63kJ/mol。

In its natural form as willow bark and leaves, this remarkable remedy dates back to Hippocrates. In 1829 the chemical in the willow tree that can relieve pain and fever was discovered to be salicin. By 1899 the Bayer Company in Germany had marketed a variant, acetylsalicylic acid, under the name of aspirin.

柳树皮和柳树叶是其天然形式，这种疗效显著的药物可以回溯到希波克拉底时代。1829年，人们发现柳树中能止痛退烧的化学物质为水杨醇葡萄糖甙。1899年，德国拜耳公司上市了一种变种商品，命名为阿司匹林。

The ancient Greeks, for example, treated pain with a tea made by boiling willow leaves and bark, a tea modern scientists now know contains salicin, a precursor of acetylsalicylic acid—aspirin.

例如，古希腊人用柳叶和柳树皮煮成的茶水来止痛。现代科学家已经了解到，这种茶里面含有水杨苷成分，就是乙酰水杨酸——阿司匹林的前身。

The most appropriate catalyzed temprature and pH for it is 60 ℃ and 5.5 respectively. It has the extreme stability at the temperatures no more than 50 ℃.The CMC-Na has the protective effect on the cellulase. The pH stability range of the purified cellulase is 4 ~ 8. Zn2+, Ca2+, Mg2+, K+, Li+ can ativate the cellulase. And cellulase can mainly decompose CMC and salicin, but can decompose other substrates feebly.

对这个组分的催化性质进行了研究，该酶的最适催化温度60 ℃，pH值为5.5，在50 ℃以下酶的稳定性较好，70 ℃条件下底物对酶有较强的保护作用，该酶的pH稳定性范围为4～8， Zn2+，Ca2+，Mg2+，K+，Li+对酶活有促进作用，Mn2+、Co2+、、Fe2+、Fe3+对酶活起抑制作用，酶对CMC-Na和水杨素有分解作用，而不分解脱脂棉和滤纸。

The "a" came from acetyl. The "spir" came from the spirea plant, which alsoproduces salicin. And the "in"?

a"取自"acetyl"，"spir"取自"spirea"（绣线菊类的植物，另一种也能制造酸的植物），那么"in呢？

In this research, the activities of CWDE were measured by saccharifying according to the theory that red-brown amino compounds were produced when 3, 5-dinitro salicylic acid and aldehyde were heated together. And the testing conditions were made clear. The activity of Cx should be tested with optimal temperature of 50℃, optimal pH of 4.8, incubation time of 30 min, and optimal substrate of 0.6% CMC-Na. Due to the heat-libality, Cx should be sterilized more than 10 min. The testing conditions of the activity ofβ-G were almost the same with Cx except the substrate of 0.5% salicin and the sterilization time of more than 15 min.

主要取得了一下成果：(1)明确了条锈菌细胞壁降解酶活性测定的条件：羧甲基纤维素酶活性的测定条件为50℃，pH4.8，反应时间30min，底物浓度为0.6%羧甲基纤维素钠，以DNS法测定，且失活酶液的灭活时间应大于10min；β-葡萄糖苷酶活性的测定条件为：50℃，pH4.8，反应时间30min，底物浓度为0.5%水杨苷，以DNS法测定，且失活酶液的灭活时间应大于15min；果胶酶活性的测定条件为：50℃，pH4.8，反应时间1h，底物浓度为0.25%果胶，以DNS法测定，且失活酶液的灭活时间应大于10min。

By using high performance liquid chromatographycombined withthin-layer chromatography,three PG:salicin,salicortin and deltoidin weredetected in the bark of P.deltioides,Five kinds of PG were detected in the leaves,which included trmuloidin and tremulacin besides the three PG.

采用薄层色谱与高效液相色谱法相结合的方法，在实验材料的树皮中测定到三种主要的酚甙类物质：水杨甙、柳皮甙和美洲黑杨甙，在叶片中测定到5种酚甙类物质，除上述3种物质外，还包括2′-苯甲酰水杨甙和颤杨甙，对于后两者在前人的研究中未见报道。研究还对5种化学物质进行了分离。

The fusant F-K6-lm4208 can't make gelatin liquefy,but can hydrogenize the nitrate,and ferment maltose, xylose, glucose, fructose, cellobiose, lactose, glucopyranoside, sorbose and mannose,but can't ferment rhamnose,aesculin and salicin.

对本实验室保存的反刍兽月形单胞菌K6及分离鉴定的粘膜乳杆菌lm4208进行了菌株生长曲线绘制，确定了粘膜乳杆菌lm4208及反刍兽月形单胞菌K6的对数生长期，粘膜乳杆菌lm4208对数生长期为4~12h，反刍兽月形单胞菌K6对数生长期为8~16h。

Five kinds of bacteria were isolated from disease Meretrix meretrix and culture water (two isolated from the M. meretrix, three from the culture water) in Lvsi harbor, Jiangsu province. The results of infection showed that strain WG1702 can cause disease with the mortality rate 100 percent and the same symptoms as original. It was cued that strain WG1702 was the pathogenic bacteria and caused the death in large scare, a preliminary research was done on the bacteria including morphological, physiological, biochemical characteristics, phylogenetic position and pathogenic. Strain WG1702 was a straight-rod gram negative bacterium, the physiological and biochemical indicators were lysine decarboxylase, ornithine decarboxylase, reduction of NO3- to NO2-, mannitose, oxidase and methylred reaction positive, arginine decarboxylase, arginine dihydrolase, salicin and voges-proskauer negative.

本文从江苏吕泗文蛤养殖区发病文蛤和养殖水体中分离到5株优势菌(病蛤中分离到3株优势菌，养殖水体中分离到2株优势菌)，人工感染实验结果显示，菌株WG1702能引起供试文蛤发病，死亡率为100%，且发病症状与原发病症状相同，提示该菌是引起文蛤大面积死亡的主要致病菌，对其形态、生理生化特征、分类地位及致病性进行了初步研究，菌株WG1702为革兰氏阴性菌，直杆状，生理生化指标为：赖氨酸脱羧酶、鸟氨酸脱羧酶、硝酸盐还原、甘露糖、氧化酶、甲基红阳性，精氨酸脱羧酶、精氨酸双水解酶、水杨素、V.P阴性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐