A scheme for compactification of ammonia water absorption refrigerators, especially for the reduction of the height of the generating rectification column is proposed, which includes using spiral sheet heat exchangers as the generator and the partial condenser of the refrigerator instead of the tube shell ones.

提出了一種氨水吸收式制冷機(jī)緊湊化的方案欧美暴力性爱，特別是采用螺旋板式換熱器作為發(fā)生器和分凝器以降低發(fā)生精餾器高度的新設(shè)計(jì)春药视频一区二区二区四区，給出了采用上述改進(jìn)方案所研制的乙醇蒸餾裝置的實(shí)驗(yàn)結(jié)果。

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Methods:A YWG-C18 column was used.The mobile phase consist ed of acetonitrile containing 0.2% methanol-water solution containing 0.1% tri ethylamine and 0.1% phosphoric acid(3∶97)and the detection wavelength was 220 nm.

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OBC dual-receiver is a new-developed exploration technique in the late eighties of last century, which is mainly used to suppress " water column reverberation " interference appeared between sea bottom and sea level that resulted in effectively improving S/N ratio of seismic data.

海底電纜雙檢接收技術(shù)是20世紀(jì)80年代末出現(xiàn)的勘探新技術(shù)国产有毛，主要用于壓制在海底和海面之間存在的"水柱混響"干擾精品国产三级免费，能有效地提高地震資料的信噪比。

A theoretical analysis shows that the non-zonation of ACC in the region of Kerguelen Plateau is due to the changes in potential vorticity of the water column caused by the curl of the ratio of wind stress to topography. The bifurcation and turning of ACC is related to the curl distribution.

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The charomatographic conditions of separation and direct dermination of benzophenone-4(MS40), salizyle acid sodium, salol, benzophenone-3(M40), octyl dimethyl PABA(6007), butyl methoxy dibenzoyl methane(1789), octyl methoxyl cinnamate and octyl salicylate(587) from u-Bondapak C18 Column were studied with methanol-water-THF as elution. A HPLC method for these compounds was founded.

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Methods: The sample that pass through handled to be abstracted twice by acetonitrile, evaporate the organic phase to dryness following defecated through the Na2SO4, cleaned-up by norm alhexalle, then analysed by HPLC (C18 column) with a gradient system of methanol-water as a mobile phase.

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