Results 81 to 90 of about 1,246,235 (130)

N,N,N-三甲基-2-萘基季铵盐的合成

open access: yes, 2007
以2-萘胺和碘甲烷为原料,首次合成了N,N,N-三甲基-2-萘基季铵盐,其结构经1H NMR ...
黄毅   +5 more
core  

Synthesis and Structure Characterization of the Quaternary Ammonium Salt of Chitosan

open access: yes, 1997
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]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Zhang H   +6 more
europepmc   +1 more source

Quaternary phosphino chitosan quaternary ammonium salt as well as preparation method thereof and application thereof

open access: yes, 2016
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
core  

[Association between airborne particulate matter(PM 2.5) concentration and the incidence of allergic rhinitis in Shanghai]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2023
Sun N   +12 more
europepmc   +1 more source

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