[Effects of buffer salt types and non-counter ions of ion-pair reagents on the retention behavior of strongly ionized acid compounds in ion-pair reversed-phase liquid chromatography]. [PDF]
Liu X +5 more
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[Simultaneous determination of three quaternary ammonium muscle relaxants in blood by high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Huang Y +4 more
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Synthesis and Structure Characterization of the Quaternary Ammonium Salt of Chitosan
用异相法合成了水溶性壳聚糖季铵盐衍生物,并用红外光谱及核磁共振谱进行结构表征。结果表明:在中性反应条件下,壳聚糖分子的季铵盐衍生化反应主要发生于亲该中心C2位的氨基上。所合成的壳聚糖季铵盐衍生物可直接溶解于水,其水溶液可以任意比例与乙醇、丙二醇、甘油等混溶The water soluble quternary ammonium salt of chitosan derivatives were synthesed in heterogeneous system and characterizad by ...
许晨, 丁马太, 卢灿辉
core
[Advances in stem cell and exosome-based therapies for dry eye disease]. [PDF]
Zhang H +6 more
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[Research progress on high performance liquid chromatography stationary phases based on mixed mode]. [PDF]
Li SJ, Li Z, Tang ZX, Lyu M, Wang LT.
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Development of novel hydrophilic and antibacterial silicone rubber impression material for dental application. [PDF]
Zhang X, Li J, Jiang F, Zhou C, Wu J.
europepmc +1 more source
本发明涉及日化领域及医药行业,具体是一种季膦化壳聚糖季铵盐及其制备方法和应用。季膦化壳聚糖季铵盐结构式如式(1)所示,平均聚合度n取值范围是20?3000。本发明反应高效,易于推广,所需设备及原料易得。研究表明合成的季膦化壳聚糖季铵盐水溶性好,具有极好的抑真菌活性 ...
魏丽杰 +6 more
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[Innovation in experimental teaching practice based on miniature mass spectrometer: from mass spectrometry principles to applications]. [PDF]
Li L, Hong J, Yu XH, Gao PF, Zhai YB.
europepmc +1 more source
[Association between airborne particulate matter(PM 2.5) concentration and the incidence of allergic rhinitis in Shanghai]. [PDF]
Sun N +12 more
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