3-丙烯酰胺基-9-乙基咔唑/碘鎓盐体系敏化甲基丙烯酸甲酯光聚合

研究了 3_丙烯酰胺基_9_乙基咔唑 (AAECZ) /氯化二苯基碘钅翁盐 (DPIOC)组成的光敏引发体系引发的甲基丙烯酸甲酯 (MMA)光聚合 ,并研究了各因素对聚合速率的影响 ,得到了聚合动力学方程 ;讨论了温度对聚合反应的影响 ,并探讨了引发机理     

压电液相免疫传感信号放大技术研究进展

本文简要介绍了压电液相生物传感器的理论基础,并对近年来压电液相免疫传感技术中所采用的质量效应信号放大技术和非质量效应信号放大技术的研究进展作系统综合评述。引用文献46篇。     

具有饱和接触率和垂直传染的SIRS传染病模型分岔分析

研究了一类具有饱和发生率、脉冲生育、脉冲接种和垂直传染的SIRS传染病模型的复杂动力学行为,首先构造了一个庞卡莱映射,然后利用映射的不动点及其特征值,得到了系统无病周期解的存在和稳定的条件,接着详细讨论了系统的跨临界分岔、超临界分岔和倍周期分岔现象,最后给出了能很好验证理论分析的数值结果.     

Mechanical Properties of Breast Cancer Cell Membrane Studied with Optical Tweezers

Membrane tethers are extracted from breast cancer cells using a force generated by an optical trap. It is experimentally obtained that the radius of tether is about 0.1μm and the static tether force is about 8.5 pN. Calculations based on the experimental measurements give a bending modulus for the tether of 1.35 x 10^-19 N.m and a surface membrane tension of 6.76 x 10^-6 N/m in the breast cancer cell. The treatment with cytochalasin D results in the decreasing bending modulus and decreasing apparent surface tension. When the membrane protein caveolin is over-expressed, similar cases occur in bending modulus and apparent surface tension. In addition, the viscous resistance coefficient of the membrane is calculated to be 1.15pN.s/μm according to the dynamic tether forces obtained under different pulling velocities.     

具有表面活性的功能化离子液体N-(三甲氧硅丙基)-N-甲基-2-吡咯烷酮盐酸盐的合成与表征

以N-甲基-2-吡咯烷酮和3-氯丙基三甲氧基硅烷单体为原料,利用SN2亲核取代反应合成具有一定表面活性的功能化离子液体N-(三甲氧硅丙基)-N-甲基-2-吡咯烷酮盐酸盐.通过元素分析、红外光谱和核磁共振对功能化离子液体进行表征,并测定了其表面张力和导电率.结果表明,合成的产物结构与其理论结构基本一致,具有较宽的液体温度范围和较低的表面张力,并具有较高的电导率,随着温度的升高,电导率逐渐增高.     

为创建中国特色的数学教育而努力——评《马忠林数学教育论文集》

今年就是我国现代数学教育家马忠林教授八十寿辰了。为总结马忠林先生五十余年如一日辛勤耕耘在数学教育园地上的业绩,江苏教育出版社已经把他生平有关数学教育(教学)的部分论文、演     

Color-stable,reduced efficiency roll-off hybrid white organic light emitting diodes with ultra high brightness

High-brightness and color-stable two-wavelength hybrid white organic light emitting diodes (HWOLEDs) with the configuration of indium tin oxide (ITO)/ N, N, N, N-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD): tetrafluoro-tetracyanoqino dimethane (F4-TCNQ)/N,N-di(naphthalene-1-yl)-N,N-diphenyl-benzidine (NPB)/ 4,4-N,N-dicarbazolebiphenyl (CBP): iridium (III) diazine complexes (MPPZ) 2 Ir(acac)/NPB/2-methyl-9,10-di(2-naphthyl)anthracene (MADN): p-bis(p-N,N-di-phenyl-aminostyryl)benzene (DSA-ph)/bis(10-hydroxybenzo[h] quino-linato)beryllium complex (Bebq2)/LiF/Al have been fabricated and characterized. The optimal brightness of the device is 69932 cd/m2 at a voltage of 13 V, and the Commission Internationale de l'Eclairage (CIE) chromaticity coordinates are almost constant during a large voltage change of 6-12 V. Furthermore, a current efficiency of 15.3 cd/A at an illumination-relevant brightness of 1000 cd/m2 is obtained, which rolls off slightly to 13.0 cd/A at an ultra high brightness of 50000 cd/m2. We attribute this great performance to wisely selecting an appropriate spacer together with effectively utilizing the combinations of exciton-harvested orange-phosphorescence/blue-fluorescence in the device. Undoubtedly, this is one of the most exciting results in two-wavelength HWOLEDs up to now.     

非贵金属催化电极Ni/C@CF的制备及绿色类Fenton性能

传统芬顿(Fenton)法利用Fe²⁺催化H₂O₂产生具有强氧化性的羟基自由基(·OH),可以高效氧化降解水中有机污染物,但其操作pH范围窄(pH≈3)和易产生铁絮凝沉淀的缺点限制了其应用发展.原子氢H*作为一种单电子供体,可以将电子快速转移到H₂O₂中,生成·OH,适用于广泛的pH值,没有铁污泥产生,是一种新型高效绿色芬顿法.然而,原子H*更易相互结合形成H₂,极不稳定,因此,探索合适的电催化剂对H*绿色Fenton的应用起着至关重要的作用.本文以炭黑作为载体,通过液相还原法制备了具有催化活性高、性能稳定的Ni/C@碳毡(Ni/C@CF)非贵金属电催化材料,制备的Ni纳米粒子均匀分散在炭黑上.以此电极材料为阴极,构建绿色Fenton催化体系,能够催化H₂O和H+生成H*,进而催化H₂O₂产生·OH,高效降解去除水中抗生素污染物.通过调节制备方法、电压、溶液pH值及外加氧化剂量,确定了该体系...