Characterization of Human Serum Immunoglobulin G Modified with Singlet Oxygen

Reactive oxygen species, as singlet oxygen (¹O₂), is continuously being generated by aerobic organisms, and react actively with biomolecules. At excessive amounts, ¹O₂ induces oxidative stress and shows carcinogenic and toxic effects due to oxidation of lipids, proteins and nucleic acids. In our study, immunoglobulin G (IgG) was modified by ¹O₂ generated by the ultraviolet (UV) irradiation of methylene blue. The modified IgG was characterized by UV spectroscopy, carbonyl content determination, thermal denaturation and electrophoretic study. Oxidation induced by modification of IgG by ¹O₂ also analyzed by scavenging studies. It was found that ultraviolet absorption spectra of modified IgG shows marked hyperchromicity. The carbonyl content was found to be high in modified IgG as compared to native IgG which confirms its oxidation. Thermal denaturation of modified protein sample shows decrease in Tm value by 3 °C and less intensity banding pattern on polyacrylamide gel electrophoresis. The quenching effect of sodium azide provides clue for modification of IgG by methylene blue, as it is known ¹O₂ scavenger. Hence, the IgG modified with ¹O₂ may be one of the etiological pathogenic factors for rheumatoid arthritis and diabetes.     

石灰预处理在制革废水处理中的应用

采用石灰预处理法对皮革废水进行处理,研究了石灰添加量对灰皮水及蓝皮水COD值和氨氮含量的影响,结果表明：石灰预处理灰皮水可大幅度降低水体的COD值和氨氮含量,其原理应为可溶性蛋白质在等电点下沉淀,氨氮以氨气的形式挥发．     

痕量铜的新催化光度法测定

研究了铜(Ⅱ)催化双氧水氧化溴百里酚兰褪色的催化效应及动力学条件,建立了测定痕量铜的新催化光度法.该法标准曲线的线性范围为铜(Ⅱ)浓度0～0.5μg/25mL,检出限为0.009μg/25mL,方法简便、快速、准确,用于铝合金中痕量铜的测定,回收率为96.0%～98.3%.     

从“黄”与“蓝”透视中西文化差异

在中国文化中黄色乃至高无上的象征，而在西方文化中被奉为高贵之色的却是蓝色（紫色）。这种文化现象并非偶然存在的。从地理学意义上说，色彩的不同文化内涵与不同的自然环境紧密相关；黄色与蓝色代表了两种不同的文化性格和文化心理，反映了两种不同的思维模式和感觉模式；色彩还具有行为学意义上的文化意蕴。     

光照、温度对亮蓝色素稳定性影响的研究

研究了光照、温度及酸度等因素对食用合成色素亮蓝稳定性的影响.研究表明:亮蓝色素的酸稳定性较好,在pH=2～9的范围内能稳定保存;耐热性较好,温度对其稳定性基本没有影响;暗处放置有利于色素的保存;金属离子K 、Na 、Mg2 、Al3 、Mg2 、Zn2 与其共存,稳定性较好;Fe3 和Cu2 的加入,会使亮蓝色素溶液变色,生成难溶物;食品中只能添加微量的Fe3 、Cu2 .     

铸造铝合金中硅的分光光度分析方法

探讨了铸造铝合金中高硅的钼蓝光度分析方法，通过采取减少试样引入量、减少硅的相对含量等方式，使方法得以适用；提出了方法的最佳分析条件，从而使分析的结果在国家标准的误差范围之内．     

环境水样中NO2-的催化光度法测定

提出了催化褪色光度法测定痕量NO2-的新方法.此法是基于百里香酚蓝在H2SO4介质中被KBrO3氧化的反应受到痕量NO2-的催化.本法的检测限为4.6×10-8g/mL,测定范围为2～12μg/25mL.     

一种稳定的蓝色有机电致发光材料

In order to compare two kinds of blue electroluminescent materials,we have investigated two kinds of blue OLEDs with the similar structure ITO/CuPc/NPB/JBEM:perylene/Alq/Mg:Ag[device(J)] and ITO/CuPc/NPB/DPVBi:perylene/Alq/Mg:Ag[device(D)].The difference of luminance and efficiency was not obvious for the two devices,However,there was remarkable difference for their lifetime.The device(J) achieved longer half lifetime of 1035h at initial luminance of 100 cd/m^2,and that of device(D) was only255h,According to their energy level diagrams,the differentce of their stability may originate from different host materials in the two devices.It may be attributed to the better thermal stability of JBEM molecues than that of DPVBi.It is shown that JBEM may be a promising blue organic electroluminescent material with great stability.     

绿蓝并举实虚结合--全面建设小康社会与岳阳经济发展的战略思考之二

岳阳的地理位置、自然资源、经济条件和发展现状，决定了岳阳在全面建设小康社会，实施“跨一攻二兴三”协同发展经济战略的同时，还应当注重“绿蓝并举，实虚结合”。即在发展绿色经济的同时大力发展蓝色湖泊经济，在发展实体经济的同时适度发展虚拟经济，促进岳阳经济全面、协调、可持续发展。     

数值计算蓝相BPII的序参数张量参数

采用液晶的格胞理论,运用一定的统计方法,在定域坐标系中,对蓝相序参量张量的参数进行数值计算,得出不同势参数下约化温度与蓝相BPII序参量张量参数之间的关系图,所得的结果和实验相符.