氮化法

A new spectrophotometric method for the determination of chromium has been developed. In HCl medium, the chromium oxidizes hydroxylammonium chloride to form nitrite, which produces a pink azo dye when reacting with p-aminobenzene sulfonic acid and α-naphthylamine.

基于铬在稀盐酸介质中氧化盐酸羟胺产生亚硝酸根，而亚硝酸根与对氨基苯磺酸重氮化后可与α-萘胺偶联产生粉红色偶氮染料，提出了分光光度法测定铬的新方法。

In HCl medium, iodate oxidizes hydroxylammonium chloride to form nitrite, which can produce a red azo dye with the reaction of p nitroaniline and α naphthylamine.

基于碘酸根在稀盐酸介质中氧化盐酸羟胺产生亚硝酸根，而亚硝酸根和对硝基苯胺重氮化后可以与α-萘胺偶联产生红色偶氮染料，提出了分光光度法测定碘的新方法。

The various surface treatments such as without treatment, nitridation, RTO, and ozone water are compared and studied.

所以我们比较了没做表面处理、氮化处理、快速热氧化法与用臭氧水成长氧化层等不同表面处理方法，探讨对特性的影响。

The detectability for element in salution is 10-12/μL. The quantity of extractant used, the extraction time, reliability and reproduci-bility of the method are discussed.

薄层显色法所用的显色剂叠氮化钠是剧毒和易爆炸的药品，实验条件比较苛刻。

A new fluotescence quenching method has been developed to determine nitrite in water samples. The method is based on the diazo-reaction between nitrite ion and thionine in dilute suifuric acid medium.

文章研究了在稀硫酸介质中亚硝酸根与硫堇发生的重氮化反应，基于硫堇的荧光强度随亚硝酸根的加入量增加而明显降低的现象，建立了荧光猝灭法测定痕量亚硝酸根的新方法。

Our plant develops usualness inter-access technology communication with more than ten international famous electric furnace manufacturing companys,and repeated visits to the foreign advanced electric furnace factories and institutes every year, learning and absorbing foreign advanced industrial furnace manufacturing technology and production processes, technology, special components of electric furnace improving technology, product upgrading technology, it makes our plant keep synchronization with the international advanced industrial furnace manufacturing technology no whether in the type,the updating of furnace, fundation material progress, components manufacturing technology progess , manufacturing automation, and the way the loading of the loading basket manufacturing technology, WDS lining energy saving techniques, ceramic fiber wave of high pressure tied ceiling stack technology, oxidation-free protection atmosphere, carburizing, nitriding, molten, salt bath, nitrate Austempered, precision heat treatment process, equational flow and temperature heat transfer asymmetric quenching tank manufacturing technology, microcomputer program heat treatment technology curve temperature control process , and so on can keep pace with internationa advanced industrial electric furance manfacturing technology.

我厂与国际十多家著名电炉制造公司开展经常性互访技术交流，每年多次前往国外先进电炉制造厂和研究所，学习并吸收国外先进的工业电炉制造技术和生产过程，工艺技术，电炉专用零部件改进技术，产品更新换代技术，使我厂工业电炉产品无论在品种类型，炉种更新，基础材料进步，零部件制造技术进步，制造工艺自动化，装料方式和装料筐制造技术方式，WDS炉衬节能技术，陶瓷纤维波浪叠法高压捆扎吊顶技术，无氧化保护气氛，渗碳，氮化，盐浴，硝盐等温淬火，精密热处理工艺，均流均温换热不对称淬火油槽制造技术，微电脑程序热处理工艺曲线控温等各个方面，能够与国际上先进工业电炉制造技术保持同步。

The experiments on the chemical synthesis of DL-phenylalanine employed the Modified Aniline way, the Diazo Reaction, Hydrolysis Reaction, and Aminate Reaction in turm to synthesize the DL-phenylalanine.

混旋苯丙氨酸化学合成实验部分首先采用改进苯胺法，经重氮化反应、Meerwein反应、水解反应、氨化反应，合成混旋苯丙氨酸，收率达到84％。

The yield was 84%. With OP-10, NPE as the the catalyzer for the diazo reaction, the use of hydrolyzed propenenitrile instead of propenoic acid, and OP-10 as the catalyzers of the aminate reaction, these experiments showed the feasibility of industralization, due to the much reduced costs, shortened reaction time and a higher yield.

采用壬基酚聚氧乙烯醚（OP-10）、萘磺酸甲醛缩合物作重氮化反应催化剂，丙烯腈加成、水解替代丙烯酸，OP-10做氨化反应催化剂，通过四因子三水平正交试验法实验，得到较佳反应参数，反应时间、收率、成本都大大降低，适宜工业化生产。

Both both me plant and international a dozen or more home in the front rank electric heater manufacturing company unfold recurrenting exchange visits exchange of know-how,per annum time after time head for abroad advance electric heater manufactory and look into ,study combine drink in abroad advanced industry electric heater manufacturing engineering AND production run, technical skill, electric heater dedication spare improve on technology, product replacement and update technology,take me plant industry electric heater product soever at variety type, kiln strain renewal, underpinning advancement, spare manufacturing engineering advancement, manufacturing engineering automation, loading pattern AND discharge basket manufacturing engineering approach, wds brasque power-saving technology, ceramic fiber wave stack normal height prick suspended ceiling technique, non-oxidation shielding gas atmosphere, carburize, nitride, salt bath, saltpetre salt austemper, precision heat treater art, flow equalization temperature equalization recuperation asymmetry oil quenching bath manufacturing engineering, microcomputer procedure heat treatment cycle curve control warm up grade spectrrm,in a position to and internationally advance industry electric heater manufacturing engineering held in.

我厂与国际十多家著名电炉制造公司开展经常性互访技术交流，每年多次前往国外先进电炉制造厂和研究所，学习并吸收国外先进的工业电炉制造技术和生产过程、工艺技术、电炉专用零部件改进技术、产品更新换代技术，使我厂工业电炉产品无论在品种类型、炉种更新、基础材料进步、零部件制造技术进步、制造工艺自动化、装料方式和装料筐制造技术方式、WDS炉衬节能技术、陶瓷纤维波浪叠法高压捆扎吊顶技术、无氧化保护气氛、渗碳、氮化、盐浴、硝盐等温淬火、精密热处理工艺、均流均温换热不对称淬火油槽制造技术、微电脑程序热处理工艺曲线控温等各个方面，能够与国际上先进工业电炉制造技术保持同步。

Methods 60 female SD rats were randomly divided into four groups, namely normal control, pathological, solfasalazine and JCKT groups. Experimental colitis model in rats were induced by Trinitrobenzene sulphonic acid. The expression of EGFR and PCNA were observed by immunohistochemistry.

雌性 SD 大鼠 60 只，随机分为 4 组，分别为正常对照、模型、柳氮磺胺吡啶及结肠康泰组，以 5% 2，4，6-三硝基苯磺酸诱导大鼠形成结肠炎症，免疫组化法观察 EGFR 及 PCNA 的表达。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。