查询词典 formic acid

The effect of voltage,distance from spinneret to collecting screen and concentration of polycaprolactam-formic acid solution on the configuration of the fiber was analyzed,and the relationship between the above electro-spinning parameters and the diameter distribution of the spun fiber was investigated.

采用静电纺丝的方法纺制了锦纶6纳米级纤维，分析了锦纶6甲酸溶液质量分数、喷丝头与接收屏之间的距离和电压对纤维形态结构的影响，讨论了上述参数和静电纺锦纶6纤维直径分布之间的关系。

A method for the determination of 12 sulfonamides (sulfanilamide, sulfamonomethoxine, sulfacetamide, sulfamethoxazole, sulfadiazine, sulfisoxazole, sulfathiazole, sulfadimethoxine, sulfamerazine, sulfaquinoxaline, sulfamethazine, sulfanitran) in cosmetics was developed by ultra performance liquid chromatography with photodiode array detector. The chromatographic column used was Acquity UPLCTM BEHC C18 (50 mm×2.1 mm, 1.7 μm) and the mobile phase was acetonitrile-0.1% formic acid aqueous solution.

建立了采用超高效液相色谱-二极管阵列检测器测定化妆品中12种常见的磺胺抗生素(磺胺，磺胺间甲氧嘧啶，磺胺醋酰，磺胺甲基异唑，磺胺嘧啶，磺胺二甲异唑，磺胺噻唑，磺胺二甲氧嘧啶，磺胺甲基嘧啶，磺胺喹啉，磺胺二甲嘧啶，磺胺硝苯)的方法。

Methods: Glipizide gliclazide glyburide glimepiride gliquidone repaglinide nateglinide pioglitazone rosiglitazone metformin phenformin and tolbutamide added in the blank ground samples were extracted with 80% methanol and were separated from an ACQUITY UPLC DBH C18 column with a gradient mobile phase of acetonitrile - 0.2 % formic acid water solution. A tandem quadrupole mass spectrometer equipped with electrospray ionization source was used in positive ion mode multiple reaction monitoring was performed to quantify above mentioned compounds.

被添加在中成药制剂及其包装物中的二甲双胍、苯乙双胍、罗格列酮、吡格列酮、格列吡嗫娶瑞格列奈、甲苯磺丁脲、格列齐特、格列苯脲、那格列奈、格列美脲、格列喹酮等西药成分用80%甲醇提取，以乙腈- 0.2%甲酸水溶液为流动相梯度洗脱，在ACQUITY UPLC DBH C18色谱柱上分离，串联四级杆质谱检测，MRM方式采集并定量。

Analyse and compare what adopt a variety of pair of methods, the Michael addition reaction of ester of acerbity second of second of hydroxyl of protection of benzyl of the response of close nucleus addition that uses second nitrile and ester of formic acid second certainly, chloridize, cyanogen, reaction that take off carboxyl generates 3- benzyl oxygen radical the fifth of the ten Heavenly Stem the method of 2 nitrile, detailed discussion the action that wait and the by-product that arise possibly reach the reactant in each pace reaction, activator, dissolvent avoid a method.

通过对多种方法的分析和比较，确定采用乙腈和甲酸乙酯的亲核加成反应、氯化苄保护羟基、氰乙酸乙酯的Michael加成反应、脱羧反应生成3-苄氧基戊二腈的方法，并具体的讨论了每一步反应中反应物、催化剂、溶剂等的功能和可能产生的副产物及避免方法。

In joins in the cobaltous acetate resultant besides nano-carbonball, has tubular of matter the minority head harness metal. Adds response the formic acid nickel to be possible to obtain the particle size comparatively greatly to have the carbon-encapsulated. The Co3B obtained resultant shape not to be more irregular also to have the carbon-encapsulated.

当加入醋酸钴反应时，产物中除奈米碳球外，还具有少数头戴金属钴之管状物质；而加甲酸镍时，则可得到较大粒径具有包覆现象之奈米碳球；然而加入硼化钴所得反应产物形状较不规则且具有包覆之奈米颗粒。

The results showed that the ultrasonic extraction is a rather ideal method of extracting red P. tha fortuneana pigment. Cyanidin3glucoside can be hydrolysised to aglycon cyanidin under the conditions of 90℃, 9％HCl and 11min.Silica gel thinlayer chromatography with developping agent benzene∶ethyl acetate∶formic acid = 2∶2∶1 is better to separate cyanidin. Cyanidin is stable to heat and light, unstable to Zn2+ and Fe3+ and Cu2+, insensitive to Co2+ and Bi3+, befitting to acidic condition.

结果表明，超声提取法是提取火棘红色素的较理想方法；矢车菊素3葡萄糖苷在90℃和9％盐酸中水解11 min，可以顺利得到其苷元矢车菊素；以苯、乙酸乙酯、甲酸(2∶2∶1)为展开剂的硅胶薄层层析法分离矢车菊素的效果较好；矢车菊素对热和光较稳定，在酸性条件下稳定，对Co2+和Bi3+不敏感，对Zn2+、Fe3+、Cu2+不稳定。

Using liquid-reduction or complex-redution method,four catalysts,i.e,the Au/C,Pd/C,Pd-Au/C-T and Pd-Au/C-H were preparated and which electroanalytic activities and stabilities for the oxidation of formic acid were compares.

合成并比较了碳载Au、碳载Pd、碳载高合金化Pd-Au和碳载非合金化Pd-Au催化剂对甲酸氧化的电催化活性和稳定性。

The electrocatalytic performance of the Pd/TiC-C catalysts for the oxidation of formic acid was investigated.

研究了TiC和C作混合载体的Pd催化剂对甲酸氧化的电催化性能。

Ethyl acetate?formic acid (100∶1∶0.5) as elute］.

乙酸乙酯？甲酸(体积比100∶1∶0.5)为洗脱剂，可以将大黄酚和大黄素甲醚完全分离。

This paper studies the synthesis of the Philippines from 9-hydroxy fluorene -9 - formic acid to its bromide process.

本文研究了由菲醌合成9-羟基芴-9-甲酸到其溴代的过程。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。