砒霜坳隧道监控量测及其应用

结合新奥法施工的需要,讨论京珠高速公路粤境北段砒霜坳隧道左、右线必测项目和选测项目监控量测工作及主要量测方法和分析结果,以及在隧道施工中的应用.     

Preparation of copper arsenite and its application in purification of copper electrolyte

The preparation of copper arsenite with arsenic trioxide was presented and its application in the purification of copper electrolyte was proposed. The variables of n（OH^-）/n（As）, n（Cu）/n（As）, NaOH concentration, reaction temperature and pH value have some effects on the yield of copper arsenite. The optimum conditions of preparing copper arsenite are that the molar ratio of alkali to arsenic is 2：1, NaOH concentration is 1 mol/L, the molar ratio of copper to arsenic is 2：1, pH value is 6.0 and reaction temperature is 20℃. The yield of copper arsenite is as high as 98.65% under optimum conditions and the molar ratio of Cu to As in the product is about 5：4. The results of the purification experiments show that the removal rate of antimony and bismuth is 53.85% and 53.33% respectively after 20g/L copper arsenite is added. The purification of copper electrolyte with copper arsenite has the advantages of simple technique, good purification performance and low cost.     

氯酸钾综合处置技术

氯酸钾主要的处置方法有两种，包括焚烧处置、氧化还原处置，焚烧处置产生的废气会造成环境二次污染，且控制不好极易造成爆炸，常规的氧化还原处置方式针对于处置大量的氯酸钾难度较大，由于氯酸钾溶解度较低，且具有爆炸性，通过加热等方式促进溶解也易造成爆炸，同时处置后产生的可溶性盐含量较高，后续处置难度较大，氯酸钾优化处置技术，从改进处置装置，协同处置钡盐，减少氯酸盐处置后产生的可溶性盐含量，改进了处置废液氯酸根检测方法，并探索出了一种现场快速检测方法。     

早吃热 晚吃凉

俗话说：“早上吃姜胜过参汤，晚上吃姜等于砒霜。”虽然晚上吃姜并不真像服用砒霜那样可怕，但此句话说出了一个养生的道理：早上吃热性的食物对身体有益，而晚上吃热性食物则对身体有害，应吃一些凉性的食物。     

载三氧化二砷的PEG—PLGA隐性纳米粒的制备及体外研究

The aim of this study was to prepare arsenic trioxide （ATO）-loaded stealth PEGylated PLGA nanoparticles （PEG-PLGA-NPs） and to assess the merits of PEG-PLGA-NPs as drug carriers for ATO delivery. PEG-PLGA copolymer was synthesized with methoxypolyethyleneglycol （Mw=5000）, D, L-lactide, and glycolide by the ring-opening polymerization method. Amorphous ATO was transformed into cubic crystal form to increase its solu-bility in the organic solvent. ATO-loaded PEG-PLGA-NPs were prepared by the modified spontaneous emulsification solvent diffusion （SESD） method, and the main experimental factors influencing the characteristics of nanopar- ticles were investigated, to optimize the preparation. To confirm the escape of PEG-PLGA-NPs from phagocytosis by phagocytes, PEG-PLGA-NPs labeled rhodamine B uptake by murine peritoneal macrophages （MPM） were analyzed by flow cytometry. The results showed that the physicochemical characteristics of PEG-PLGA-NPs were affected by the type and concentration of the emulsifiers, polymer concentration, and drug concentration. ATO-loaded PEG-PLGA-NPs, with particle size of 120.8nm, zeta potential of-10.73mV, encapsulation efficiency of 73.6%, and drug loading of 1.36%, were prepared under optimal conditions. The images of transmission electron micros-copy （TEM） indicated that the optimized nanoparticles were near spherical and without aggregation or adhesion. The release experiments in vitro showed the ATO release from PEG-PLGA-NPs exhibited consequently sustained release for more than 26d, which was in accordance with Higuchi equation. The uptake of PEG-PLGA-NPs by MPM was found to decrease markedly compared to PLGA-NPs. The experimental results showed that PEG-PLGA-NPs were potential nano drug delivery carriers for ATO.     

砒霜测试iGame 260＋显卡镀银PCB接受挑战

一、引言 早在2009年1月初，iGame研究所便对外公布了其自行研发设计的第一片IPU芯片，其设计上为我们带来了众多创新表现。这次除了展现质量至上的产品设计理念，iGame研究所在最新的iGame显卡PCB（印刷电路板）内覆全球第一家“SPT超量镀银”工艺（Ultra—much silver plating technology），     

饮料业的心动与心痛

饮料业有软黄金之称，从今天中国饮料老大——娃哈哈一年100多亿的经营状况看．其的确是具有捞金的超凡实力，这不能不令众多投资者心动；另一方面，近年来，饮料界的“砒霜门”、“自来水门”等食品安全事件不断，惹得业界风生水起、热闹不堪。这又不能不让众多饮料企业时时心痛。     

互联网思维：家电业的春药还是砒霜？

四川长虹是国内家电行业中最早向互联网转型的。去年下半年,长虹推出系列智能家居产品,气贯长虹,让资本市场对这家老牌国企刮目相看,被认为是老树发新芽。凭此,四川长虹去年股价翻番。     

我国砒霜厂场地污染现状及其治理研究进展

砒霜厂是我国一类典型的重金属复合污染场地。介绍了国内砒霜厂遗留场地的形成背景和污染现状,对物理阻隔、固化/稳定化、生态修复三类主要治理技术的基本原理和特点进行了综述,并重点阐述了固化/稳定化材料的种类及其应用现状,总结了砒霜厂污染场地治理的典型工程案例,分析与展望了砒霜厂污染场地治理技术的发展方向,旨在为砒霜厂污染场地的修复和管理提供参考。