A novel sandwich\|type compound, Na\-\{12\}\[Fe\-4(H\-2O)\-2(As\-2W\-\{15\}O\-\{56\})\-2\]\538H\-2O(denoted as Fe\-4As\-4W\-\{30\}) was synthesized. The compound was well characterized by means of IR, UV\|Vis, \{\{\}\...A novel sandwich\|type compound, Na\-\{12\}\[Fe\-4(H\-2O)\-2(As\-2W\-\{15\}O\-\{56\})\-2\]\538H\-2O(denoted as Fe\-4As\-4W\-\{30\}) was synthesized. The compound was well characterized by means of IR, UV\|Vis, \{\{\}\+\{183\}W NMR\} and elemental analyses. Redox electrochemistry of the compound has been studied in acid buffer solutions using cyclic voltammetry(CV). The compound containing multilayer films has been fabricated on the 4\|aminobenzoic acid(4\|ABA) modified glassy carbon electrode(GCE) surface by alternate deposition with a quaternized poly(4\|vinylpyridine) partially completed with \[Os(bpy)\-2Cl\]\+\{2+/-\}(denoted as QPVP\|Os). CV, X\|ray photoelectron spectroscopy(XPS) and UV\|Vis spectroscopy were used to characterize the as\|prepared multilayer films. It is proved that the multilayer films are uniform and stable. The electrocatalytic activities of the multilayer films were investigated on the reduction of two substrates of important analytical interest, NO\+-\-2 and H\-2O\-2.展开更多
砷酸盐[arsenate,As(Ⅴ)]作为水体中砷的主要存在形态之一,通过食物链影响食品安全。微生物砷脱除技术以其安全经济的优势成为解决食品砷污染途径之一。对砷的脱除能力是微生物脱砷技术的前提和基础。库德毕赤酵母(Pichia kudriavzevii...砷酸盐[arsenate,As(Ⅴ)]作为水体中砷的主要存在形态之一,通过食物链影响食品安全。微生物砷脱除技术以其安全经济的优势成为解决食品砷污染途径之一。对砷的脱除能力是微生物脱砷技术的前提和基础。库德毕赤酵母(Pichia kudriavzevii)作为一种多抗性酵母,可耐盐、高温和重金属(镉、锌和铜)等。该文研究了As(Ⅴ)对P.kudriavzevii A16生长的影响,并运用非靶向代谢组学技术研究了砷酸盐胁迫与正常培养条件下P.kudriavzevii A16之间的差异表达代谢物及代谢通路的变化。砷酸盐胁迫与正常培养相比,正离子模式下检测到317个差异代谢物,169个显著上调表达,148个代谢物显著下调表达;负离子模式下,检测到差异代谢物329个,其中171个显著上调表达,158个代谢物显著下调表达;差异代谢物的KEGG(Kyoto Encyclopedia of Genes and Genomes)富集通路主要涉及谷胱甘肽代谢、氨酰tRNA合成等代谢通路,As(Ⅴ)促进了酵母细胞能量代谢,增强了其抗氧化性能。该文从代谢组学水平解析了砷酸盐胁迫下库德毕赤酵母代谢物的变化,为指导微生物法脱砷技术的开发提供参考。展开更多
文摘A novel sandwich\|type compound, Na\-\{12\}\[Fe\-4(H\-2O)\-2(As\-2W\-\{15\}O\-\{56\})\-2\]\538H\-2O(denoted as Fe\-4As\-4W\-\{30\}) was synthesized. The compound was well characterized by means of IR, UV\|Vis, \{\{\}\+\{183\}W NMR\} and elemental analyses. Redox electrochemistry of the compound has been studied in acid buffer solutions using cyclic voltammetry(CV). The compound containing multilayer films has been fabricated on the 4\|aminobenzoic acid(4\|ABA) modified glassy carbon electrode(GCE) surface by alternate deposition with a quaternized poly(4\|vinylpyridine) partially completed with \[Os(bpy)\-2Cl\]\+\{2+/-\}(denoted as QPVP\|Os). CV, X\|ray photoelectron spectroscopy(XPS) and UV\|Vis spectroscopy were used to characterize the as\|prepared multilayer films. It is proved that the multilayer films are uniform and stable. The electrocatalytic activities of the multilayer films were investigated on the reduction of two substrates of important analytical interest, NO\+-\-2 and H\-2O\-2.
文摘砷酸盐[arsenate,As(Ⅴ)]作为水体中砷的主要存在形态之一,通过食物链影响食品安全。微生物砷脱除技术以其安全经济的优势成为解决食品砷污染途径之一。对砷的脱除能力是微生物脱砷技术的前提和基础。库德毕赤酵母(Pichia kudriavzevii)作为一种多抗性酵母,可耐盐、高温和重金属(镉、锌和铜)等。该文研究了As(Ⅴ)对P.kudriavzevii A16生长的影响,并运用非靶向代谢组学技术研究了砷酸盐胁迫与正常培养条件下P.kudriavzevii A16之间的差异表达代谢物及代谢通路的变化。砷酸盐胁迫与正常培养相比,正离子模式下检测到317个差异代谢物,169个显著上调表达,148个代谢物显著下调表达;负离子模式下,检测到差异代谢物329个,其中171个显著上调表达,158个代谢物显著下调表达;差异代谢物的KEGG(Kyoto Encyclopedia of Genes and Genomes)富集通路主要涉及谷胱甘肽代谢、氨酰tRNA合成等代谢通路,As(Ⅴ)促进了酵母细胞能量代谢,增强了其抗氧化性能。该文从代谢组学水平解析了砷酸盐胁迫下库德毕赤酵母代谢物的变化,为指导微生物法脱砷技术的开发提供参考。
