以廉价易得的盐酸/亚硝酸钠为催化剂,碘为碘化试剂,通过分子氧,氧化碘化芳烃、醚、酚的活泼芳香底物,发展了温和条件下高效碘化方法。以苯甲醚为模型底物,系统考察了影响反应的因素,确定的最佳反应条件为:20℃氧气条件下,1,2-二氯乙烷(DCE)为溶剂,n(苯甲醚)∶n(碘)∶n(亚硝酸钠)∶n(HC l)=1∶0.515∶0.05∶0.1。该方法碘原子经济性好,催化剂廉价易得,反应时间大为缩短,选择性好、转化率高,副产物仅为水,容易处理,绿色环保、易于工业化;通过反应机理验证实验 ...
张国富 +3 more
core
[Preparation of magnetic bifunctional materials for exosome capture from serum and phosphopeptide enrichment]. [PDF]
Wang ZR, Zheng HJ, Jia Q.
europepmc +1 more source
本发明提供了一种稀土掺杂氟化物纳米分散液的制备方法,解决了目前掺稀土纳米分散过程中存在的分散浓度低,表面修饰剂抑制纳米分散液发光性能的技术问题。该方法以反应离子的硝酸盐为反应前驱物,通过调节反应体系的pH值,利用水热法合成掺稀土氟化物纳米粉体,根据溶剂极性、密度及纳米颗粒表面电荷等特性,结合超声波技术将其分散到有机溶剂中,得到透明的掺稀土氟化物纳米分散液。本发明所制备的纳米分散液具有高分散浓度、高透过率、高纯度以及不易发生团聚的优点;本发明的制备方法所需温度较低,工艺简单易操作 ...
崔晓霞, 韦玮, 王中跃, 彭波
core
[Expert Consensus on the Clinical Application of Sodium Cantharidinate and Vitamin B6 Injection]. [PDF]
Lung Cancer Specialty Committee of Chinese Elderly Health Care Association.
europepmc +1 more source
本发明涉及α-氟代查耳酮类化合物及其制备方法和作为治疗Ⅱ型糖尿病药物的用途,其结构式如下通式(T)所示。其中:R与Ar的定义见所明书。本发明的化合物具有激活腺苷单核苷酸激酶(AMP-activated protein kinase,AMPK)的能力 ...
杨佑喆, 黄涌澜, 孙健
core
[Effectiveness and cost-effectiveness of risk-based topical fluoride intervention on early childhood caries in Jiangnan District, Nanning City]. [PDF]
Jiang Y +8 more
europepmc +1 more source
应用响应面法对通过钡盐转化法制备重铬酸钠的工艺进行了优化,在单因素试验基础上,选定反应温度、反应时间和液固比为影响因子,以铬酸钡的转化率为响应值,采用Design-Expert软件设计三因素三水平的响应面分析方法,由此得到最优工艺参数为:反应温度80℃、反应时间400 min、液固比9∶1(体积质量比mL/g)。在此条件下进行试验,得到铬酸钡的转化率实际值是95%,与预测值非常接近 ...
张懿 +5 more
core
[Electroacupuncture alleviates articular chondrocyte apoptosis in rats with knee osteoarthritis by regulating the TLR4/MyD88/NF-κB signaling pathway]. [PDF]
Li C +6 more
europepmc +1 more source
[Determination of 26 perfluorinated and polyfluoroalkyl compounds in human serum by solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Yue YX +9 more
europepmc +1 more source
[Deep eutectic solvent and improved needle filter-based liquid-membrane microextraction combined with high performance liquid chromatography for the determination of sulfonamide and fluoroquinolone residues in milk]. [PDF]
Xu RM +5 more
europepmc +1 more source

