The Experts below are selected from a list of 8817 Experts worldwide ranked by ideXlab platform
Ren Shi-xue - One of the best experts on this subject based on the ideXlab platform.
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Dispersibility and flocculability of a trimethy Quaternary Ammonium Salt of wheat-alkali-lignin under microwave irradiation
Journal of Beijing Forestry University, 2012Co-Authors: Ren Shi-xueAbstract:The trimethyl Quaternary Ammonium Salt was synthesized under microwave irradiation with wheat-alkali-lignin as raw material, which was extracted from black liquor from the kraft process. Its dispersibility and flocculability were determined: surface tension decreased with the increasing concentration of trimethyl Quaternary Ammonium Salt, degreasing of surface tension was less effective toward water, the surface tension was 63.64 mN/m with its concentration of 500 mg/L;it had a certain dispersion of calcium carbonate particles and can be used as a scale inhibitor; the flocculation of trimethy Quaternary Ammonium Salt was examined by the acid dye of Acid Red B and Acid Orange GG, and the results showed that the acid dye of Acid Red B and Acid Orange GG could be flocculated, and decolorization of Acid Orange GG was higher; the trimethyl Quaternary Ammonium Salt had sedimentation of flocculation with a concentration of 1 000 mg/L kaolin colloidal particle at a concentration of 300-500 mg/L with pH values of no more than 3.
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Synthesis of a trimethy Quaternary Ammonium Salt of wheat-alkali-lignin under microwave irradiation.
Journal of Beijing Forestry University, 2012Co-Authors: Ren Shi-xueAbstract:Alkali lignin has low reaction activity because of its chemical structure,but its reactivity can be improved under microwave irradiation.The trimethyl Quaternary Ammonium Salt was synthesized under microwave irradiation with wheat-alkali-lignin as raw material,which was extracted from black liquor from the kraft process.Effects of reaction temperature,reaction time and catalyst on the synthesis were investigated.The optimal synthesis conditions were determined:reaction temperature 75 ℃,reaction time 25 min,and catalyst was not necessary because the microwave irradiation played a similar role as a catalyst.The flocculation of trimethy Quaternary Ammonium Salt prepared from wheat-alkali-lignin was examined by acid black ATT dye in an aqueous solution,and the results showed that over 90% acid black ATT dye solution could be flocculated when the trimethyl Quaternary Ammonium Salt at a concentration of 600 mg/L with pH values of 1-2.5 was added into the acid black ATT dye with a concentration of 0.15 g/L.
Xiang Zhou - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and biological activities of quinazoline derivatives with ortho-phenol-Quaternary Ammonium Salt groups.
Bioorganic & Medicinal Chemistry, 2007Co-Authors: Lixia Zhang, Lige Ren, Minghui Bai, Liwei Weng, Minggang Deng, Xiang ZhouAbstract:One phenol-Quaternary Ammonium Salt derivative with a flexible linker and three derivatives with a quinazoline moiety are present. Their binding affinities for DNA are discussed and it is clearly demonstrated that this class of phenol-Quaternary Ammonium Salt derivatives could inhibit DNA transcription effectively.
Zhaohua Zhong - One of the best experts on this subject based on the ideXlab platform.
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evaluation of chitosan Quaternary Ammonium Salt modified resin denture base material
International Journal of Biological Macromolecules, 2016Co-Authors: Rong Song, Zhaohua ZhongAbstract:Chitosan Quaternary Ammonium Salt displays good antioxidant and antibacterial characteristics and it shows appreciable solubility in water. When added to the traditional denture material to form a resin base, it could promote good oral health by improving the oral environment. In this study, chitosan Quaternary Ammonium Salt was added to the denture material following two different methods. After three months of immersion in artificial saliva, the specimens were tested for tensile strength and were scanned by electron microscope. The murine fibroblast cytotoxicity and antibacterial properties were also tested. The result showed no significant differences in the tensile strength and in the proliferation of murine L929 fibroblast cells. The two structures of chitosan Quaternary Ammonium Salt-modified denture material had different degrees of corrosion resistance and antimicrobial properties. These results indicate that chitosan Quaternary Ammonium Salt-modified resin denture base material has the potential to become a new generation oral denture composite material.
Peng Xue-ping - One of the best experts on this subject based on the ideXlab platform.
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Synthesis,Properties and Application of Hyperbranched Gemini Quaternary Ammonium Salt
Fine and Specialty Chemicals, 2006Co-Authors: Peng Xue-pingAbstract:Hyperbranched Gemini Quaternary Ammonium Salt was synthesized with dodeca-tertiary amine and epoxy chloropropane as materials.The fist step was reacting at 80℃ for 4h to produce Quaternary Ammonium Salt,and then the target product was synthesized by reacting at 85℃ for 8h.The special characteristics of hyperbranched Gemini Quaternary Ammonium Salt were researched and the applications in oil field,paper making,industrial water treatment,printing PCB, pesticide and textile auxiliary were discussed also.
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Synthesis and Application of Rosin-base Quaternary Ammonium Salt
Fine and Specialty Chemicals, 2006Co-Authors: Peng Xue-pingAbstract:The rosin-base Gemini Quaternary Ammonium Salt was synthesized with natural rosin,tetramethyl-ethylenediamine and epoxy chloropropane as raw materials.The optimum temperature of Salt forming was 80℃ and the optimum temperature of esterification is 140℃.The synthesized product could be applied in cation dispersion rosin-base size emulsifier,pesticide synergistic agent and cation pitch emulsifier.
Lixia Zhang - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and biological activities of quinazoline derivatives with ortho-phenol-Quaternary Ammonium Salt groups.
Bioorganic & Medicinal Chemistry, 2007Co-Authors: Lixia Zhang, Lige Ren, Minghui Bai, Liwei Weng, Minggang Deng, Xiang ZhouAbstract:One phenol-Quaternary Ammonium Salt derivative with a flexible linker and three derivatives with a quinazoline moiety are present. Their binding affinities for DNA are discussed and it is clearly demonstrated that this class of phenol-Quaternary Ammonium Salt derivatives could inhibit DNA transcription effectively.
