成酸性

When the solution changed from acidic to basic, the chem. shifts of b-15N atom shifted from 366-380 ppm to ~500 ppm, corresponding to an equilibrium shift from hydrazone form to azo anion structure of the dyes.

当样品溶液从酸性转成碱性，β-氮-15原子的化学位移从366-380PPM移到500PPM，相应于从腺型到偶氮阴离子结构。

Based on the absorption property of glyoxime which can be formed by addition reaction of aldehyde group and hydroxylamine in the UV-spectral region,spectrophotometric determination of glyoxal in glyoxal solution was proposed.

利用醛基与羟胺在酸性条件下的成肟反应产物乙二醛二肟对紫外光的吸收特性，用紫外分光光度法测定乙二醛的含量。

The whole work is mainly composed of following three parts:Part I: we first reported the Michael reaction of indole.

通过吲哚与α，β-不饱和酮的Michael加成反应，在酸性离子液体HSO4催化下高产率地得到了目标化合物。

Despite ready access to the sea food, Liguria's best-known food is land-based in origin. Focaccia, the locals' answer to pizza, is right-angled cuts of tasty bread made with little more than flour, salt, olive oil and a few extras than vary depending on which town along the Italian Riviera you visit. The tastiest type hails from Recco, where Stracchino cheese ( Stracchino is a type of Italian cheese, typical of Lombardy which derives from the Italian word "stracca", meaning "tired". It is said that the milk from tired cows is richer in fats and more acidic. It is eaten very young, has a soft, creamy texture and normally a mild and delicate flavour. It is normally square in form.) gets sandwiched between two layers of bread and then served piping hot. Those not keen on stand-up lunches among the sun-lotioned throngs have plenty of alternatives though as rustic eateries are plentiful around Santa Margherita Ligure.

在乐乔亚区虽然海产唾手可食，可是最吸引人的美食还是当地类似 Pizza 整齐切片的 Focaccia 面包，口味与配料延著义大利 Riviera 地区而异，主要是由面粉、盐、橄榄油与洋葱等额外配料烤成，最美味的是来自 Genova 省 Recco 区的 Stracchino 起司夹心热三明治( Stracchino 起司是 Lombardy 地区的典型起司，Stracchino 源自义大利文"stracca"，原意是疲倦，产自疲倦乳牛的牛乳据闻更富脂肪与酸性；趁鲜食用，乳脂柔软富香气，以块状包装)，它并非渴望在艳阳下囫囵吞枣的五脏庙祭品，但环绕 Santa Margherita Ligure 地区却有许多乡间小馆可让大家选择。

β-Methylhydrogen itaconate was prepared from itaconic acid and methyl alcohol with benzoyl chloride as catalyst.

摘 要：以衣康酸和无水甲醇为原料，酸性催化下酯化合成β-衣康酸单甲酯。

According to Griess reaction, diazonium-salts formed from aromatic amines such as sulfonamides etc., react with NaNO_2 in acid medium and may be coupled with α-naphthylamine or diphenylamine to produce red colored compounds.

一按Griess反应芳香族胺类的重氮化鹽，如对氨基苯磺醯胺类药物等，在酸性溶液中皆能与α-萘胺或二苯胺分别偶合成偶氮色素而显紅色，过多之亞硝酸可与氮色素再作用使紅色消失而呈棕黄色。

It is reported in this paper that diphenylcarbazone reacts with Hg in pH 2.2 in the presence of Tween─60 to form a purple complex with its absorption maximum at 486 nm. The existence of chloride will depress the absorption of the complex. The negative absorption will be proportional to the consistence of chloride.

摘要﹞ 在pH为2.2的酸性介质中，在吐温－60溶液的存在下，Hg与二苯卡巴形成紫色的配合物，其最大吸收波长为486 nm，氯离子的存在可使原紫色配合物吸光度降低，其负吸光度与氯离子浓度成正比。

Objective: To investigate the nephrotoxicity of plumbagin on human embryonic kidney cell 293 in vitro and protective effects of acid fibroblast growth factor on the cells.

目的：观察白花丹素在体外对人胚肾细胞293的毒性，以及酸性成纤维细胞生长因子对白花丹素所致肾损伤的保护作用。

Glia; gliogenesis; glioma; glial cells; central nervous system; CNS; glial progenitor cells; glial fibrillary acidic protein; ependymocytes; ependoma; cytokeratins; vimentin; tanycytes; ion transport; lining cells; cerebrospinal fluid; CSF; ventricular system; floor plate; axon guidance; choroidal cells; choroid plexus epithelium; Chiari malformations; congenital aqueductal stenosis; neuroblast migration disorders; gap junctions

神经胶质；gliogenesis；神经胶质瘤；胶质细胞；中枢神经系统；CNS；神经胶质祖细胞；胶质原纤维酸性蛋白；室管膜细胞；ependoma；细胞角蛋白；波形蛋白；tanycytes；离子转运；衬细胞；脑脊髓液；CSF；脑室系统；底板；；脉络膜细胞；脉络丛上皮；恰里畸形；先天性导水管狭窄；成神经细胞迁徙扰乱；缺隙连接点

They also have a high catalyzing potential to oxidize SO 2 into SO 3 , which can be extremely damaging due to its acidic properties.

他们还具有较高的催化氧化潜力的SO 2成的SO 3 ，它可以是极为有害的，因为它的酸性属性。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。