秩消因子分析—荧光光度测定某些食物中的营养元素硒

本文应用秩消因子分析－荧光光度法测定了食物中营养元素硒的含量，与文献〔１〕报道的ＤＡＮ－荧光光度法测定结果比较，具有良好的统计学一致性，从而为简化实验操作，改善痕量硒测定的准确性和灵敏度提供了新的可能。     

交联助剂对PPC／NBR弹性体结构和性能的影响

研究了马来酸酐（ＭＡ）及异氰脲酸三烯丙酯（ＴＡＩＣ）对聚丙撑碳酸酯／丁腈橡胶共混弹性体结构和性能的影响，发出加入ＭＡ或ＴＡＩＣ能有效地改善交联网络；加入适量ＭＡ能显著改善共混弹性体热氧老化稳定性；加入ＴＡＩＣ使共混弹性体具有优良的高弹特性和力学性能。     

Visual recognition of melamine in milk via selective metallo-hydrogel formation

A novel protocol allowing convenient and highly selective visual recognition of melamine in raw milk via selective metallo-hydrogel formation at a concentration as low as 10 ppm without any tedious pretreatment has been developed.     

THz spectroscopic investigation of 2,4-dinitrotoluene

We have investigated the terahertz (THz) spectrum of 2,4-DNT by using Fourier transform infrared spectroscopy in the 0.2–19.5 THz region. We also examined low-frequency intermolecular or phonon modes between 0.2 and 1.8 THz via THz time-domain spectroscopy. The extracted absorption coefficient and refractive index of an intermolecular band at 1.08 THz are 110 cm⁻¹ and 1.67, respectively. Density functional theory (DFT) was applied to obtain structure and vibrational frequencies of 2,4-DNT. The calculated results are in agreement with the experimental data. Observed vibrational frequencies have been interpreted using DFT. Two intermolecular or phonon modes were identified at 1.08 and 2.52 THz.     

Preparation of Europium Induced Conformation—specific anti—calmodulin Monoclonal Antibody

Monoclonal antibody technique was employed to detect the conformational difference of CaM induced by metal ions. A trivalent europium ion induced conformation-specific anti-calmodulin monoclonal antibody was successfully prepared with europium-saturated calmodulin as antigen.     

偏最小二乘光度法同时测定多种酚的研究及应用

利用Ｃｕ（Ⅱ）吡啶能与酚形成稳定的三元配合物的特点，研究了Ｃｕ（Ⅱ）－吡啶－酚三元显色新体系，并以偏最小二乘法建立模型预测，同时测定了模拟水样和环境水样中的对苯二酚、间苯二酚、邻苯三酚和对硝基苯酚，取得满意效果。     

氨-碘酸盐介质中白喉类毒素的平行催化氢波

在 0 .4mol/LNH3 NH4Cl (pH 8.3 1 )介质中 ,白喉类毒素 (DT)于 - 1 .89V(vs.SCE)处产生的极谱催化氢波可被碘酸钾进一步催化 ,峰电流明显增大 ,但峰电位不变 ,产生一种氢的新动力波 ,建议称其为平行催化氢波。在 0 .4mol/LNH3 NH4Cl(pH 8.3 1 ) - 5 .0× 1 0 - 3 mol/LKIO3介质中 ,DT平行催化氢波的二阶导数峰电流与其浓度在 0 .2 μg/mL～ 1 .0 μg/mL内呈线性关系 ,可用于生物制品中DT含量的测定。     

反应挤出法合成S/B多嵌段共聚物的研究

在阴离子引发体系下 ,以双螺杆挤出机为反应器 ,采用丁二烯、苯乙烯混和单体加料方式 ,本体法一步合成了S B多嵌段共聚物 .考察了螺杆转速、进料速率以及不同丁苯配比对反应挤出合成PS及S B嵌段共聚物聚合转化率的影响 .用1 H NMR、IR、DMA、TEM等方法对S B嵌段共聚物进行了表征 ,结果表明共聚物由多个微小的丁二烯嵌段和少量无规段组成 .当丁二烯含量少至 15 %左右时 ,其嵌段可回缩成球状 ,粒径大约在 30～ 5 0nm .该材料的韧性随着共聚物中丁二烯含量的增加而逐渐提高 ,特别是断裂延伸率的提高尤为显著