The catalytic activity of iodine in the esterification reaction was studied by synthesis cyclohexyl acetate from acetic anhydride,cyclohexano and acetic acid,cyclohexano.

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Wound healing of rat skin may be arbitrarilydivided into the following stages: wound generation, suppurating in someinflammation area, growing of granulation tissue, scab formation,decrustation, and completely healing. The wound depth and the extent ofhealing also could be determined from the OCT images in the different healingtime. Healing time for the skin scald was found to be much shorter than those ofthe skin wound. Because the skin wound is serious than the skin scalds. 3 The result of using OCT to monitor the model of acetic acid gastric ulcer in rats:Results of this experiment showed that using OCT technology can identify theulcerative gastric mucosa tissues with normal tissues, make the imaging on theunder-layer of gastric mucosa tissues, and evaluate the healing period and healingquality. From the OCT images can be clearly found the acetic acid gastric ulcer.

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Optimal process conditions for preparing 2-oxo-1-piperazine acetic acid: N,N'-ethylenediamine diacetic acid with hydrochloric acid at a mole ratio of 1 to 2.6 ,was cyclized to form 2-oxo-1-piperazine acetic acid by refluxing for 8 hours.

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N,N'-ethylenediamine diacetic acid was prepared by condensation of ethylenediamine, formaldehyde and potassium cyanide. Then 2-oxo-1-piperazine acetic acid was prepared from N,N'-ethylenediamine diacetic acid. In addition, 2-oxo-1, 4-piperazine diacetic acid(3-KP) was prepared from 2-oxo-1-piperazine acetic acid with chloroacetic acid.

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With benzoic acid, terephthalic acid, 2. 6naphthalene dicarboxylic acid, dimethyl-2, 6-naphthalene dicarboxylate as solutes, water, acetic acid, N, N-dimethylformamide, N, N-dimethylacemide, dimethyl sulphoxide, N-methl2-ketopyrolidine, and the mixture of water and acetic acid as solvents respectively, the solubilities of 15 binary systems and 4 ternary systems were determined.

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The result of study on the apparent kinetics of photochlorination of acetic acid showed that the reaction rate is comparatively slow and the byproduct of dichloroacetic acid is created during the reaction. In order to put the technology of photochlorination of acetic acid into industrialization, the new technology about distillation column with a single reactor having a large reactive potency must be adapted.

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Results Qidan Granules could relieve the pain caused by glacial acetic acid and heat stimuli; significantly inhibit the oxytocin-induced dysmenorrheal in mice; It also showed obvious inhibitory effects on the increased capillary permeability induced by glacial acetic acid, carrageen-induced toe edema in rats and dimethylbenzene-induced ear swelling in mice, and cotton pellet-induced granuloma formation in rats. It could also significantly inhibit oxytocin-induced dysmenorrhea in mice.

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Experiments show that water solution contained 0. 5 -1 % sodium sulfate and 1 - 2% acetic acid is treated by means of electrodialyzer of 200 × 400mm assembled with tri - membrances and 19% sodium sulfate and 20% acetic acid are recovered by concentrating and separating. The content of salt and acid in the purified water is less than 0. 01%, current efficiency greater than 85 %, flow length in 3 ~ 5m and power consumption about 40 ~ 50 kwh/t.

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In result, formic, acetic, methanesulfonic, oxalic, malonic, succinic and glutaric acids were detected notably. Formic, acetic and oxalic acids were the most abundant organic acids, and the sum of their concentrations averagely accounted for 89% of the total detected organic acids and 13% of the total anions, respectively.

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Glycerolgenesis. Organic acids was mainly produced during growth phase, acetic acid was the highest, about 1. 6g/L. When the amount of acetic acid and α-Keto glutaric acid was increased slightly and others decreased a bit in 〓 process. The kinds and amount of arganic acide during microbial glycerol production in C.

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