Porous organic polymer with in situ generated palladium nanoparticles as a phase-transfer catalyst for Sonogashira cross-coupling reaction in water

A new Pd nanoparticle loaded and imidazolium-ionic liquid decorated organic polymer of Pd@PTC-POP was readily fabricated via a Pd(PPh₃)₄ catalysed in situ one-pot Suzuki cross-coupling reaction between imidazolium attached dibromobenzene and 1,3,5-tri(4-pinacholatoborolanephenyl)benzene. Besides the high thermal and chemical stability, the obtained Pd@PTC-POP can be used as a highly active and reusable phase-transfer solid catalyst to promote the Sonogashira coupling reaction in water. The obtained results indicate that the Pd@PTC-POP herein could create a versatile family of solid phase transfer catalysts for promoting a broad scope of reactions carried out in water.

A Pd nanoparticle loaded and imidazolium-ionic liquid decorated organic polymer, which can be used as a highly active phase-transfer solid catalyst to promote the Sonogashira reaction in water, was reported.     

组织透明化技术在神经退行性疾病中的应用研究进展

组织透明化技术是一种快速发展的新兴组织学技术,将大块组织、单个器官、啮齿动物全身以及人类大型标本,通过一系列物理化学原理与方法进行处理,在保持其完整性的同时快速实现高度光学透明,为高通量地获取生物组织三维结构信息提供了重要的工具.结合现代光学成像技术和荧光标记技术,可显著提高成像深度和图像对比度,已成为经典组织学技术有...     

用牛免疫缺陷病毒筛选抗艾滋病药物的实验模型

本文应用牛免疫缺陷病毒（BIV）合胞体形成和BIV长末端重复序列（LTR）引导的萤火虫荧光素酶（Luc)基因表达分析，建立了抗艾滋病（AIDS）药物的筛选和评价模型，BIV合胞体形成及BIV－LTR引导的Luc基因活力与BIV感染的细胞呈线性关系，临床有效药物3‘叠氮胸嘧啶脱氧核苷（AZT）可显著抑制BIV合胞体的形成及BIV－LTR引导的Luc基因表达水平，并有剂量依赖关系，上述两种分析得到AZT的IC50分别为0．24和052umol/L。     

替硝唑颊含片的研究

选择合适的填充剂制备替硝唑颊含片,并考察人唾液中药物浓度.结果表明,含高黏度羟丙甲纤维素的片剂在口腔能维持治疗浓度4h.     

地中海贫血诊断实验的选择在临床的应用价值

目的探讨地中海贫血不同检测方法的选择及临床诊断应用的价值,针对不同人群建立相对合理的检测程序。方法选择经分子生物学方法确认的215例地中海贫血相关基因携带阳性病例和80例对照组,采用临床常用地中海贫血血液学筛查指标平均红细胞体积（MCV）、红细胞平均血红蛋白量（MCH）、红细胞压积（HCT）、红细胞体积分布宽度（RDW）及红细胞脆性试验（RBC脆性）进行筛查评价。比较跨跃断裂点PCR（Gap-PCR）技术、膜芯片反向点杂交技术、变性高效液相色技术对地中海贫血确认诊断的应用范围。结果 215例地贫相关基因携带阳性病例组与80例对照组MCV、MCH、HCT及RBC脆性检测数据比对分析表明,地贫组与对照组经统计学分析差异均有统计学意义（P〈0.01）。常规筛查指标对215例地贫相关基因携带阳性病例组的漏检分析显示,RBC脆性漏检率为2.33%,MCV漏检率为5.58%,MCH漏检率为6.98%,HCT漏检率为15.81%。分子生物学确认实验中Gap-PCR技术仅适用于α-珠蛋白基因缺失的检测,膜芯片反向点杂交技术可适用于α、β-珠蛋白基因突变位点的检测。结论血液学指标MCV、MCH对地贫筛查敏感性较高,可自动化、大批量操作,适合用于大规模健康体检人群的地贫筛查,而RBC脆性试验虽然敏感性高,但为手工操作,建议用于高危人群的筛查。膜芯片反向点杂交技术结合Gap—PCR技术是目前临床地贫基因确认的最佳手段。     

Nickel-metalated porous organic polymer for Suzuki–Miyaura cross-coupling reaction

A new Ni(ii)-α-diimine-based porous organic polymer, namely Ni(ii)-α-diimine-POP, was constructed in high yield via the Sonogashira coupling reaction between the metallo-building block of Ni(ii)-α-diimine and 1,3,5-triethynylbenzene. Besides the high thermal and chemical stability, the obtained Ni(ii)-α-diimine-POP can be a highly active reusable heterogeneous catalyst to promote the Suzuki–Miyaura coupling reaction. The obtained results indicate that the Ni(ii)-α-diimine-POP herein is a promising sustainable alternative to the Pd-based catalysts for catalysing the C–C formation in a heterogeneous way.

A porous organic polymer with Ni(ii) α-diimine moiety, which can be a highly active reusable heterogeneous catalyst to promote the Suzuki–Miyaura coupling reaction, was reported.