查询词典 sulfuric

Some coumarin derivatives are synthesized through Pechmann reaction with catalytical amount of sulfuric acid.

在催化量硫酸的存在下，用微波辐射进行Pechmann反应，制备香豆素衍生物，获得中等至良好的产率。

The P. caudatum were cultured in the straw water with different mass concn. of Cu(superscript 2+), its polysaccharide was extracted and detected by the anthrone-sulfuric method and the effect of Cu(superscript 2+) on the content of polysaccharide in P.

方法］通过用含不同质量浓度Cu(上标 2+)的稻草液培养大草履虫，提取其体内多糖，用蒽酮－硫酸法进行检测，研究Cu(上标 2+)对大草履虫体内多糖含量的影响。

Octachlorodipropyl ether was extracted from tea samples using n-hexane-acetone(22∶3,V/V),purified with celite 545-sulfuric acid(1g-0.4mL) using hexane as an eluent.

茶叶样品用正己烷-丙酮(22∶3，V/V)提取，经硅藻土545-浓硫酸(1g+0.4mL)净化，以正己烷洗脱，GC-ECD检测，外标法定量。

Indirect electrosynthesis of ochlorobenzaldehyde from ochlorotoluene was carried out using ceric/cerous in sulfuric acid as a mediator.

用硫酸做介质、Ce4 + Ce3+做氧化媒质间接电合成邻氯苯甲醛。

Activation with dilute chloric acid or sulfuric acid solution was adopted as pretreatment of traditional citric gold plating .

传统的柠檬酸盐镀金工艺前处理采用稀盐酸或稀硫酸活化，活化液可能被带入镀金溶液，造成SO2-4、Cl-积累，严重影响柠檬酸镀金溶液的稳定性和镀层质量。

Diluted nitric acid, phosphoric acid, organic acid and medium containing smal amount of sulfuric acid or chlorion

抗病毒中和生物鉴定法进行干扰素中和抗体检测。2。但CO2只适用于强碱性、高酸中和能力的灰渣。

Key words: collophanite; mineral beneficiation; flotation; adoption of low grade thermal energy in sulfuric acid plant; reducing steam consumption

胶磷矿；选矿；浮选；硫酸低位热能利用；降低蒸汽消耗

In addition, analysis was carried out in the differences of the water extract, effective component polysaccharide and the icariin distilled rate from the commonly cribble and the ultra-fine powder by weighing, anthrone-sulfuric acid method and RP-HPLC.

此外，还应用称重法、蒽酮-硫酸法以及反相高效液相色谱法分别比较分析了微粉与粗粉的总浸出物、有效成分多糖以及淫羊藿苷溶出率的差异。

R-1,c-2, t-3, t-4-1,3-bis(4-biphenyl)-2,4-di(4-pyridyl)cyclobutane was obtained in diluted sulfuric acid by photodimerization reaction.

通过反-1-(4-联苯基)-2-(4-吡啶基)乙烯在稀硫酸中的光二聚反应合成了r-1，c-2，t-3，t-4-1，3-双(4-联苯基)-2，4-二(4-吡啶基)环丁烷。

Ketoheptamethylenimine was prepared by one-pot reaction of cycloheptanone with concentrated sulfuric acid. In this step, oximation and rearrangement occurred .

制备庚内酰胺时，我们采用了&一锅反应&的方法，环庚酮、浓硫酸和硫酸羟胺混合在一起，经过肟化、重排一次得到庚内酰胺。

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％。