Karrer and Enslin reported that the structure of alstyrine S_(19H_(22)N_2, a selenium- dehydrogenation-degradation product obtained by Sharp from the alkaloid alstonine, is identical with that of corynanthyrine,α-[2-(4, 5 diethylpyridyl)]-β-ethylindole, despite the fact that the melting points of these two substances have a 5°difference.

前者的紫外線吸收光譜與阿爾斯泰令(alstyrine熟女屁眼，係一種由西阿斯木鹼經(jīng)硒降解後的產(chǎn)物)的吸收光譜極為類似99久久国产免费只有精品；且二者有一種相同的顏色反應(yīng)色网站性感污骚视频。

The effect of chloride carrier in spectrographic analysis has been investigated with carrier distillation method.

本文報告光譜分析中氯化物載體對雜貭元素譜綫強度的影響成在线人黄页免费视频。

Low-boiling phenols in low-temperature coal tar are important chemical raw materials. For the identification and determination of the individual phenol boiling below 210℃ in the low temperature coal tar, the methods of gas chromatography, liquid-liquid chromatography followed by ultra-violet analysis and fractional distillation followed by infrared analysis were evaluated and compared.

隨著煤煉油工業(yè)的發(fā)展啪啪啪啪啪啪啪教学视频高清无码，煤焦油中的酚類各类熟女熟妇真实广东视频，特別是低級酚，作為化工原料的利用很重要欧美性爱丫丫丫，我們應(yīng)用(1)氣液色譜法台湾农村寡妇特级A毛片，(2)液液色譜與紫外光譜法結(jié)合及(3)精餾與紅外光譜法結(jié)合三種不同方法對210°以前的低級酚進行了各種異構(gòu)體的成分分析，比較分析結(jié)果：三種方法對同一樣品進行分析時anjiuse在线观看，最大絕對誤差在2％以內(nèi)可以直接进入的黄色网站，其中以氣液色譜法最為快速老妇操B网，液液色譜法次之，精餾-紅外光譜法費時間較多日本一一video；但后二種方法所得數(shù)據(jù)較完全欧美日韩专区。

There are thermoluminescence-photoluminescence meter, high accuracy liquid scintillation counter, hot surface ionizing isotope mass-spectrometer, solid isotope mass-spectrometer, multichannel electro-inductance coupling plasma mass-spectrometer, inert gas mass-spectrometer and their corresponding laboratories.

現(xiàn)擁有熱釋光-光釋光儀、高精度液體閃射記錄儀日韩一级视频欧美一级、熱表面電離同位素質(zhì)譜儀wwXX日本免费、多通道電感耦合等離子質(zhì)譜儀和惰性氣體質(zhì)譜儀等儀器及相應(yīng)的年代學(xué)實驗室。