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Application and Study Progress of Thermophilic Bacteria in Biochemical Treatment of Wastewater
HE Wei1,LUO Yi-jing1,ZHANG Zhong-zhi1,WANG Han2,MA Dao-xiang2(1.Faculty of Chemical Science and Engineering,China University of Petroleum,Beijing 102249,China;2.No.2 Oil Production Factory,Henan Oilfield,Nanyang 473400,China)This paper introduces thermophilic bacteria's classification,thermophilic mechanism and application briefly.The cases are analyzed in order to illustrate the feasibility of wastewater treatment with thermophilic bacteria.The advantages and disadvantages of thermophilic aerobic technology,thermophilic anaerobic technology and combination of the two technologies treating wastewater are summarized in the paper,with the prospect of future research forecasted.
Research Progress on Eucommia Ulmoides Oliv. Prevention and Treatment of Osteoporosis
PAN Ya-lei 1,2,ZHAI Yuan-kun1,2,NIU Yin-bo1,2,LI Chen-rui1,2, WU Xiang-long1,2,MEI Qi-bing1,3 (1.College of Life Sciences,Northwestern Polytechnical University,Xi′an 710072,China; 2.Key Laboratory for Space Bioscience and Biotechnology,College of Life Sciences,Northwestern Polytechnical University,Xi′an 710072,China; 3.Department of Pharmacology,Fourth Military Medical University,Xi′an 710032,China)In recent years,Eucommia ulmoides Oliv.has been extensively investigated for its significant pharmacological effects in the prevention and treatment of osteoporosis.The related studies concentrate on revealing its molecular mechanism on animal level and cell level and screening the potential bioactive ingredients.This article reviews the research progress of Eucommia ulmoides Oliv.in the protection and treatment of osteoporosis and a number of perspectives have been provided.
pH-Sensitive Polymer Materials
HU Hui,FAN Xiao-dong (Department of Applied Chemistry,Northwestern Polytechnical University,Xi'an 710072,China)The concept and kinds of pH-sensitive polymer materials were reviewed.The pH-sensitive theories were discussed as well.The latest study on some representative pH-sensitive polymers were emphasized.The potential applications of these materials were introduced lastly.
Preparation and Performance Evaluation of Carboxymethyl Chitosan/Oxidized Konjac Glucomannan Composite Sponge
LI Jie;XU Jianzhen;HU Ping;LEI Qiqi;ZHANG Wenning;AO Ningjian;Using carboxymethyl chitosan(CMCS) and oxidized konjac glucomannan(OKGM) as raw materials,we prepared a CMCS/OKGM composite sponge by a freeze-drying method.Moreover,we characterized the structure by FTIR,~1HNMR,and SEM.Furthermore,we evaluated the performance by water absorption,porosity,air permeability,NIH-3 T3 cell proliferation test,antibacterial ability,and acute systemic toxicity test.The results show the optimal preparation process of CMCS/OKGM composite sponge is determined as follows:firstly,OKGM is prepared by oxidation of sodium periodate;then,5% CMCS solution is mixed with 5% OKGM solution according to the volume ratio of 5∶5,and 2% glycerin is added as a plasticizer;finally,the composite sponge is obtained by freezing and drying.The CMCS/OKGM composite sponge has good water absorption,porosity,air permeability,antibacterial activity,and biosafety,and can promote proliferation of epidermal cells.CMCS/OKGM composite sponge is an excellent base material for medical chronic wound dressing.
Research Advances on Synthesis of 4-Substituted Coumarins via Pechmann Reaction
ZHENG Tu-cai1,LI Hui-zhen1,SHEN Jin-yu1,WANG Xiao-qing2,YE Shan-hai2(1.College of Chemistry and Materials Engineering,Quzhou University,Quzhou 324000,China; 2.Zhejiang Hai-Sheng Chemicals Co.,Ltd.,Quzhou 324004,China)This review summarizes the most recent research advances on the syntheses of 4-substituted coumarins via Pechmann reaction,with particular emphases on the type of 4-substituents and reaction conditions,particularly solid acid catalysts,Lewis acid catalysts,ionic liquids,microwave-assisted reactions and ultrasound-assisted reactions.
Synthesis and Performances of Gemini Quaternary Ammonium Salts Cationic Surfactant
HAN Li-hui,LI Yin-gang (Key Laboratory of Marine Chemical Theory and Technology of Ministry of Education,Ocean University of China,Qingdao 266100,China)In this paper,one kind of Gemini quaternary ammonium salts cationic surfactant was synthesized with dodecyl dimethyl amine and 1,3-dichloropropane as main materials.The structure of the product was analyzed qualitatively by the method of IR.The melting point,CMC,epispastic character,stabilization for bubble and the anti-swelling rate as clay stabilizer in exploiting rock oil of the Gemini quaternary ammonium salts cationic surfactant were measured.The results showed that the melting point was 190℃,the CMC was 9.68×10-4 mol·L-1,the anti-swelling rate was 85.3%.The Gemini quaternary ammonium salts cationic surfactant is a kind of high performance surfactant.
Research Status and Progress in Treatment Technology for Oily Emulsified Wastewater
LI Zhong-lin;CHEN Xiao-gang;RUI Bin;ZHOU Bin;LI Song-lin;With the rapid development of industry,the increment of oily emulsified wastewater increasingly exerts pressure upon environment. It is of great significance to develop a new and efficient treatment technology for oily emulsified wastewater. We review the widely used treatment methods for oily emulsified wastewater in recent researches,and prospect the future direction of treatment technology for oily emulsified wastewater.