查询词典 reagents

Being good at method and cosmetology artifice curing skin problem such as acne , cicatrices , fleck, and having whose unique treating specifically for dark yellow , removing the trivial wrinkle , face skin loss , thick pore that cosmetics and medicines and chemical reagents arouse and so on of skin.

曾在国外专业进修医疗美容，擅长治疗青春痘、痤疮、瘢痕、色斑等皮肤问题，并针对皮肤暗黄、消除细小皱纹、化妆品及药品引起的面部皮肤损伤、粗大毛孔等有其独特的治疗方法及美容技巧。

The flotation effect of BET was compared with that of the commonly used reagents GF and FS202. The result shows that although the usage of BET is only 1/10 and 1/100 of GF and FS202 respectively, the collectability and selectivity for pyrite and coal gangue is obviously better than that of using GF and FS202. In addition, it will not be influen...

结果表明：尽管 BET的用量分别是 GF，FS2 0 2用量的 1 /1 0和 1 /1 0 0 ，但对黄铁矿、煤矸石等捕收性和选择性明显优于 GF，FS2 0 2 ，且不受 p H条件的影响；与其它 3种同系物(AET，DET，HET)在脱硫降灰方面综合比较表明，BET的效果最好，具有用量少、选择性强等优点，是一种应用前景良好的煤炭浮选药剂。

However, electron-withdrawing groups that have conjugative effect in molecule can increase complex ability, sensitivity and selectivity of fluorone reagents. From the experiment, it is clear that microemulsion media have more excellent solubilization and sensitization than micelle and water media.

而具有吸电子效应和共轭效应的基团，可以改变显色剂分子的电子云分布，使分子的共轭程度增大，使反应官能团羟基质子较容易离去，增加了显色剂与金属离子的成络能力，从而提高了试剂的灵敏度和选择性。

An experimental study was carried out on simulation of hot metal injection desiliconization in ladles by way of multi-batches top addition of desiliconization reagents plus partial immersion blowing of gaseous oxygen in SiC tube furnace at 1350℃.

在实验室SiC管炉上采用分批上置法并浸入吹O2在1350℃下进行了模拟铁水罐喷吹脱硅的实验研究。

In conclusion, we have reported herein that dialkyl phosphites are powerful reagents for radical translocation/ cyclization reactions that start from readily available terminal alkynes.

最后， 有报道说，我们这里有强大的试剂磷酸烷基自由基易位/环化反应，从现成末端炔烃。

A series of dissymmetric Gemini surfactants with the structure ofC_(12H_(25)CH_(3_(2)N~CH_(2_(4)N~CH_(3_(2)C_mH_(2m+1),denoted as C_(12)-4-C_m(m is 14,16,18),have been synthesized with N,N-dimethylalkylamine and 1,4-dibromobutane as the initial reagents.

以N，N-二甲基脂肪胺和1，4-二溴丁烷为原料，合成了一系列具有不同疏水链的不对称Gemini表面活性剂C12H25(CH3)2N+(CH2)4N+(CH3)2CmH2m+1(C12-4-Cm，m=12，14，16，18)，并通过1H NMR、MS和元素分析等方法鉴定其结构。

Progress in dissymmetric Gemini surfactants;2. A series of dissymmetric Gemini surfactants with the structure ofC_(12H_(25)CH_(3_(2)N~CH_(2_(4)N~CH_(3_(2)C_mH_(2m+1),denoted as C_(12)-4-C_m(m is 14,16,18),have been synthesized with N,N-dimethylalkylamine and 1,4-dibromobutane as the initial reagents.

以N，N-二甲基脂肪胺和1，4-二溴丁烷为原料，合成了一系列具有不同疏水链的不对称Gemini表面活性剂C12H25(CH3)2N+(CH2)4N+(CH3)2CmH2m+1(C12-4-Cm，m=12，14，16，18)，并通过1H NMR、MS和元素分析等方法鉴定其结构。

Recent development of coupling reagents and methods for hindered peptide containing N-alkylated or C_α,C_α-disubstituted amino acid residues is reviewed.

本文综述了合成含N-烷基氨基酸或α，α-二取代氨基酸位阻肽的偶合试剂研究新进展，并对这些新的偶合试剂及偶合方法的优点和不足予以评述。

The synthesis of sterically hindered peptides containing N-alkylated or 〓disubstituted amino acid residues is being a challenge, which results in difficultcondensation using the usual DCC/HOBt or HOBt-derived coupling reagents.

多肽合成的一个主要难题是富含N-烷基化氨基酸或C〓二烷基化氨基酸的肽链的合成，采用BOP或HBTU等常规缩合剂往往不能得到令人满意的结果。

Several tetraalkylammonium reagents were examined for controlling the electroosmotic flow in order to improve resolution of the enantiomers.

考察了不同种类季铵盐对电渗流及分离的影响，其中四甲基氢氧化铵能有效控制电渗流并提高组分的分离度。

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。