爬山虎色素的大孔树脂吸附、分离及理化性质研究

比较了6种不同型号的大孔树脂对爬山虎红色素的吸附能力，筛选其中最佳的HPD-600树脂作为爬山虎红色素的吸附和分离的树脂；用甲醇作为洗脱剂，洗脱效果较好；研究了食品中6种常见的共存物、4种金属离子、氧化剂、温度及光等对爬山虎红色素稳定性的影响。     

Synthesis of polypyrrole‐modified TiO2 composite adsorbent and its adsorption performance on acid Red G

The adsorption–desorption characteristics of Acid Red G (ARG) on the polypyrrole‐modified TiO₂ (PPy/TiO₂) composite as a novel adsorbent was investigated. PPy/TiO₂ was synthesized via the in‐situ polymerization of pyrrole monomer in the prepared TiO₂ sol solution. Results from X‐ray diffraction and Fourier transform infrared spectra indicated the formation of the PPy/TiO₂ composite. The adsorption experiments showed that the modification of PPy substantially improved the adsorption and regeneration abilities of PPy/TiO₂. The adsorption equilibrium was achieved in a short time of 20 min, and the adsorption kinetics followed the pseudo‐second‐order model. The Langmuir adsorption isotherm was found for PPy/TiO₂, with the maximum adsorption capacity of 179.21 mg/g. The regeneration experiments showed that PPy/TiO₂ could be successfully regenerated by simple alkali‐acid treatment. The adsorption efficiency of the regenerated PPy/TiO₂ adsorbent for ARG was still greater than 90% after regeneration for 10 times. Additionally, the adsorption efficiency of PPy/TiO₂ for the ARG effluent was still higher than 78% after adsorption–desorption for four times. It is expected that the PPy/TiO₂ composite can be considered as a stable adsorbent for the removal of dye. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Live‐Cell Imaging with Water‐Soluble Aminophenoxazinone Dyes Synthesised through Laccase Biocatalysis

Aminophenoxazinone dyes with variable water solubilities were assayed for the first time in a live‐cell imaging application. Among a library of ten sulfonylated chromophores, one compound gave excellent results as an endocytic marker, showing a precise subcellular distribution. The compound was compared to four commercial vital tracers, including Lucifer Yellow. The first laccase‐mediated regioselective synthesis of a diphosphorylated 2‐aminophenoxazinone dye was also described. This compound, water‐soluble at 10^?2 M , displayed modest fluorescence properties and the ability to complex Mg²⁺ and Ca²⁺ cations, therefore giving fluorescence quenching.     

工艺因素对钒锆蓝颜料呈色的影响

探讨了工艺因素对钒－硅酸锆蓝色颜料合成的影响，用XRD和UV－V光谱对样品进行了表征，得到一些有益的结论。     

Development of a green two‐dimensional HPLC‐DAD/ESI‐MS method for the determination of anthocyanins from Prunus cerasifera var. atropurpurea leaf and improvement of their stability in energy drinks

This study aimed to develop a green two‐dimensional HPLC‐DAD/ESI‐MS method for analysing anthocyanins from Prunus cerasifera var. atropurpurea leaf and improve their stability in energy drinks by the addition of phenolic acids. Ethanol and tartaric acid solutions were used as mobile phases for one‐dimensional HPLC‐DAD for quantitative analysis of anthocyanins, and the primary anthocyanins were identified as cyanidin‐3‐O‐galactoside, cyanidin‐3‐O‐glucoside and cyanidin‐3‐O‐rutinoside using two‐dimensional HPLC‐MS. Method validation showed that the developed method was accurate, stable and reliable for the analysis of P. cerasifera anthocyanins. The effects of gallic, ferulic and caffeic acid on the stability of cyanidin‐3‐O‐galactoside, cyanidin‐3‐O‐glucoside, cyanidin‐3‐O‐rutinoside and total anthocyanins from P. cerasifera leaf in energy drinks were evaluated, and the degradation of P. cerasifera anthocyanins ideally followed a first‐order model (R² > 0.98). Gallic acid showed stronger protective effects on P. cerasifera anthocyanins in energy drinks, and adding/increasing ferulic and caffeic acids accelerated the degradation reactions.     

铜掺杂磷酸锌钠的制备及其太阳光反射性能研究

采用共沉淀法制备铜掺杂磷酸锌钠作为热反射材料,通过XRD、SEM、UV-VIS-NIR分光光度计对产物进行表征,探讨了溶液p H值、掺杂量与热处理温度对产物晶体结构、表面形貌以及反射性能的影响。结果表明,当溶液p H从6增加到10时,样品NaZn0.5(Cu)_(0.5)PO_4的近红外反射率先升高后降低,当溶液p H值为9时,其近红外反射性能最优;随着铜掺杂量的增加,样品Na Zn1-x(Cu)_xPO_4的近红外反射率先升高后降低,当x=0.5时,其近红外反射率最高;热处理温度从400℃升高至700℃后,样品Na Zn0.5(Cu)0.5PO4的近红外反射率逐渐升高,经700℃热处理后近红外反射率高达60.4%。     

Colour assays: An inside look into Alentejo traditional limewash paintings and coloured lime mortars

A series of colour assays were conducted taking into account old bibliographic recommendations and oral testimony regarding traditional lime painting technology from the Alentejo (South Portugal) region. The main objectives were: (a) the colorimetric analysis of paintings made with different limewash preparation methods; (b) the comparison between natural processed red and yellows ochre pigments (“home made” and from industrial origin) and synthetic iron oxides in different concentrations and lime proportions; (c) the evaluation of the colorimetric CIELAB coordinates during the lime carbonation process in coloured mortars and limewashes. The results shows that the evolution of L*, a*, and b* during the carbonation process is independent of pigment concentration and paint thickness but dependent of pigment composition and finishing technique (lime painting or coloured mortar). They also emphasize the importance of surface appearance attributes and its influence on the colorimetric parameters. © 2010 Wiley Periodicals, Inc. Col Res Appl, 36, 61–71, 2011     

Combined cathodoluminescence and X-ray analysis of paint pigments

The suitability of cathodoluminescence (CL) measurements for differentiating between different paint pigments is demonstrated with an example of a combined energy-dispersive X-ray (EDX) and CL analysis of different zinc oxide (ZnO) pigments in a paint fragment where the EDX spectra are virtually identical, but where the CL spectra show significant differences. Consequently, it is possible to distinguish different pigments on the basis of CL spectra and monochromatic CL micrographs.     

云母钛珠光颜料的正电子寿命谱研究

用正电子湮没技术测量了云母钛珠光颜料的正电子寿命和强度与煅烧温度，包覆量等的关系，并与Ｘ射线衍射，透射电镜等方法进行了比较。     

水介质中制备铝粉颜料的研究

以蒸馏水替代有机溶剂制备环保型铝粉颜料,通过优化组合获取一种优良的复合缓蚀剂,以抑制铝粉在球磨过程中与水发生反应;通过优化转速、球料比及球磨时间等工艺参数,获得制备铝粉颜料的最佳条件:转速为300r/min,球料比为25∶1,球磨时间为6h.