药学专业波谱解析课本哪个比较好

雪紫冰樱 2014-11-30 13:36:50 268 浏览

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731812816 2014-12-01 00:00:00

看完宁永成《有机化合物结构鉴定与有机波普学》后，大量的图谱练习请采纳如果你认可我的回答，敬请及时采纳， ~如果你认可我的回答，请及时点击【采纳为满意回答】按钮 ~~手机提问的朋友在客户端右上角评价点【满意】即可。 ~你的采纳是我前进的动力 ~~O(∩_∩)O，记得好评和采纳，互相帮助

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药学专业波谱解析课本哪个比较好:

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药学英语翻译: Havingbrieflyexaminedthestructureoforganicpackingsandthevariousroutesintheirmanufacture，themostimportantfeaturesmaybesummarizedasfollows:>Hydrophilicaswellaslipophilicorg... Having briefly examined the structure of organic packings and the various routes in their manufacture， the most important features may be summarized as follows: > Hydrophilic as well as lipophilic organic packings are synthesized with a controlled pore and surface structure depending on the type of monomer/comonomer and the polymerization reaction. Surface structure can be altered by controlled consecutive surface reactions. > In accordance with the bulk composition， polymer packings are stable across almost the entire pH range， particularly under strong alkaline conditions. > Chemical stability is affected by oxidizing and reducing solutions. > Although cross-linking reactions have been optimised in as much as rigid pressure stable particles can be manufactured， some remaining swelling property is often noted when changing the solvent composition in HPLC. > As in the manufacture of silica， porosity， pore size， and surface area of polymer packings can be adjusted over a wide range， and micro-， meso-， and macro- as well as non-porous beads are synthesized reproducibly. 3.2.4.2 Hydrophobic Polymer Stationary Phases The synthesis of cross-linked copolymers of styrene and divinylbenzene has been studied intensively and is well documented. The starting monomer is styrene， and divinylbenzene (DVB) is used as cross-linker. The amount of DVB can reach up to 55wt.%. At 55% DVB， the copolymer shows practically no swelling and possesses a permanent porosity. Figure 3.21 illustrates the network structure of poly(styrenedivinylbenzene) (St-DVB). Commercial products differ in bead size and pore size. There are even non-porous products on the market， designed for the rapid separation of peptides and proteins by reversed phase HPLC (Maa and Horvath， 1988). St-DVB copolymers are stable in the pH range 0–14. They find increasing application in the separation of low molecular weight compounds， peptides， and proteins by means of reversed phase chromatography (Tanaka et al.， 1987， Tweeten and Tweeten， 1986) and as parent materials for the synthesis of derivatized packings in interaction chromatography of biopoly-mers (Unger et al.， 1987， Regnier， 1987). Numerous other organophilic polymer packings have been synthesized for size exclusion and interactive HPLC after suitable derivatization. They are reviewed in depth by Mikes (1988). 展开

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