以酸枣(Ziziphus acidojujuba C.Y.Cheng et M.J.Liu)水培实生幼苗为试材,研究了CaCl_2对NaCl胁迫下其根、茎、叶中抗坏血酸—谷胱甘肽循环(AsA-GSH)的影响。结果表明:与对照(日本园试配方营养液)相比,NaCl处理下根和叶中AsA含量升高,MD...以酸枣(Ziziphus acidojujuba C.Y.Cheng et M.J.Liu)水培实生幼苗为试材,研究了CaCl_2对NaCl胁迫下其根、茎、叶中抗坏血酸—谷胱甘肽循环(AsA-GSH)的影响。结果表明:与对照(日本园试配方营养液)相比,NaCl处理下根和叶中AsA含量升高,MDHAR活性升高,APX活性下降;根、茎、叶中GSH含量升高。NaCl+CaCl_2处理与NaC处理相比,根和茎中AsA含量进一步升高,叶中AsA含量下降,叶中APX下降,根中MDHAR活性进一步升高,茎和叶中DHAR活性升高;根和叶中GSH含量下降。外源CaCl_2可能通过提高酸枣实生苗根、茎和叶中AsA再生关键酶MDHAR和DHAR活性,促进根和茎中AsA的再生与生物合成,从而提高根、茎清除过量H_2O_2的能力,缓解NaCl胁迫对酸枣幼苗根和茎部的伤害。展开更多
Silicon nanowires(SiNWs)with diameter distributions ranging from 80 to 350 nm were prepared by electrochemical reduction of Ni/SiO2 in molten CaCl2.The effect of the content of nickel additives on the morphology of pr...Silicon nanowires(SiNWs)with diameter distributions ranging from 80 to 350 nm were prepared by electrochemical reduction of Ni/SiO2 in molten CaCl2.The effect of the content of nickel additives on the morphology of produced silicon was investigated.Large quantities of SiNWs are obtained by the electrochemical reduction of Ni/SiO2 blocks with SiO2 to Ni molar ratio of 20 and 10.Nickel additives repress the growth of irregular branches and promote longitudinal growth of SiNWs.Wire morphologies and surfaces are influenced by the electrolysis temperature.SiNWs become thicker with the increase of the electrolysis temperature.The optimum temperature to prepare single crystal SiNWs with high aspect ratio and extraordinary surface quality seems to be 1173 K.The amorphous layer of the silicon nanowire is thinner compared to the SiNWs obtained from the pure SiO2 pellets.The produced SiNWs show a photoluminescence emission peak at about 758 nm at room temperature.This work demonstrates the potentiality for the electrochemical reduction process to obtain large quantities of SiNWs with high quality.展开更多
文摘以酸枣(Ziziphus acidojujuba C.Y.Cheng et M.J.Liu)水培实生幼苗为试材,研究了CaCl_2对NaCl胁迫下其根、茎、叶中抗坏血酸—谷胱甘肽循环(AsA-GSH)的影响。结果表明:与对照(日本园试配方营养液)相比,NaCl处理下根和叶中AsA含量升高,MDHAR活性升高,APX活性下降;根、茎、叶中GSH含量升高。NaCl+CaCl_2处理与NaC处理相比,根和茎中AsA含量进一步升高,叶中AsA含量下降,叶中APX下降,根中MDHAR活性进一步升高,茎和叶中DHAR活性升高;根和叶中GSH含量下降。外源CaCl_2可能通过提高酸枣实生苗根、茎和叶中AsA再生关键酶MDHAR和DHAR活性,促进根和茎中AsA的再生与生物合成,从而提高根、茎清除过量H_2O_2的能力,缓解NaCl胁迫对酸枣幼苗根和茎部的伤害。
基金financially supported by the National Natural Science Foundation of China(No.51404032 and No.51504032)the National High Technology Research and Development Program of China(No.2013AA050904)
文摘Silicon nanowires(SiNWs)with diameter distributions ranging from 80 to 350 nm were prepared by electrochemical reduction of Ni/SiO2 in molten CaCl2.The effect of the content of nickel additives on the morphology of produced silicon was investigated.Large quantities of SiNWs are obtained by the electrochemical reduction of Ni/SiO2 blocks with SiO2 to Ni molar ratio of 20 and 10.Nickel additives repress the growth of irregular branches and promote longitudinal growth of SiNWs.Wire morphologies and surfaces are influenced by the electrolysis temperature.SiNWs become thicker with the increase of the electrolysis temperature.The optimum temperature to prepare single crystal SiNWs with high aspect ratio and extraordinary surface quality seems to be 1173 K.The amorphous layer of the silicon nanowire is thinner compared to the SiNWs obtained from the pure SiO2 pellets.The produced SiNWs show a photoluminescence emission peak at about 758 nm at room temperature.This work demonstrates the potentiality for the electrochemical reduction process to obtain large quantities of SiNWs with high quality.
