为了探讨环境激素类物质邻苯二甲酸二乙酯(DEP)和壬基酚(NP)对海洋微藻的联合毒性效应,选取杜氏盐藻(Dunaliellasalina)为受试生物,以环境激素对杜氏盐藻单一暴露的96 h EC50的毒性效应作为一个毒性单位(IU),采用毒性单位法比较研究了DE...为了探讨环境激素类物质邻苯二甲酸二乙酯(DEP)和壬基酚(NP)对海洋微藻的联合毒性效应,选取杜氏盐藻(Dunaliellasalina)为受试生物,以环境激素对杜氏盐藻单一暴露的96 h EC50的毒性效应作为一个毒性单位(IU),采用毒性单位法比较研究了DEP和NP单一暴露以及两者以三种不同混合比例(毒性单位比:1∶1、1∶4和4∶1)暴露对杜氏盐藻的细胞生长、叶绿体色素含量、可溶性蛋白含量、SOD活性以及最大光能转化效率(Fv/Fm)的影响。实验结果表明:DEP和NP单一暴露对杜氏盐藻的96hEC50分别为69.54 mg/L和1.47 mg/L,两种环境激素对杜氏盐藻均有抑制作用,且NP较DEP对杜氏盐藻的毒性更强。DEP和NP联合暴露较单一暴露对杜氏盐藻的细胞生长、叶绿体色素和可溶性蛋白的合成有较强的抑制作用,两种环境激素在毒性单位比为1:1、1:4、4:1三个比例水平上的联合毒性效应均表现为协同效应,其中比例为1:1的协同效应最强。展开更多
An investigation of hydrotalcite-derived ternary Mg-Al-Ce oxides as catalysts for vapour phase condensation of ethanol to 1-butanol in a flow reactor under atmospheric pressure was carried out.The Mg-Al-Ce oxide syste...An investigation of hydrotalcite-derived ternary Mg-Al-Ce oxides as catalysts for vapour phase condensation of ethanol to 1-butanol in a flow reactor under atmospheric pressure was carried out.The Mg-Al-Ce oxide systems with Mg/(Al+Ce)ratio from 1 to 4 were synthesized and characterized by XRD,SEM,NMR,and XPS.The study of acid-base characteristics of the systems with different Mg/(Al+Ce)ratio by NH3/CO_(2)quasi-equilibrium thermal desorption techniques shows that the ratio of the catalyst oxide components(Mg,Al,Ce)can provide acid/base capacity ratio close to 3 for the effectivity of the target process.The highest selectivity 68%is reached over Mg-Al-Ce oxide catalyst with the ratio of Mg/(Al+Ce)=2.展开更多
文摘为了探讨环境激素类物质邻苯二甲酸二乙酯(DEP)和壬基酚(NP)对海洋微藻的联合毒性效应,选取杜氏盐藻(Dunaliellasalina)为受试生物,以环境激素对杜氏盐藻单一暴露的96 h EC50的毒性效应作为一个毒性单位(IU),采用毒性单位法比较研究了DEP和NP单一暴露以及两者以三种不同混合比例(毒性单位比:1∶1、1∶4和4∶1)暴露对杜氏盐藻的细胞生长、叶绿体色素含量、可溶性蛋白含量、SOD活性以及最大光能转化效率(Fv/Fm)的影响。实验结果表明:DEP和NP单一暴露对杜氏盐藻的96hEC50分别为69.54 mg/L和1.47 mg/L,两种环境激素对杜氏盐藻均有抑制作用,且NP较DEP对杜氏盐藻的毒性更强。DEP和NP联合暴露较单一暴露对杜氏盐藻的细胞生长、叶绿体色素和可溶性蛋白的合成有较强的抑制作用,两种环境激素在毒性单位比为1:1、1:4、4:1三个比例水平上的联合毒性效应均表现为协同效应,其中比例为1:1的协同效应最强。
基金the Program of National Academy of Sciences of Ukraine KPKVK 6541230“Support for the development of priority areas of scientific research”(0120U101212).
文摘An investigation of hydrotalcite-derived ternary Mg-Al-Ce oxides as catalysts for vapour phase condensation of ethanol to 1-butanol in a flow reactor under atmospheric pressure was carried out.The Mg-Al-Ce oxide systems with Mg/(Al+Ce)ratio from 1 to 4 were synthesized and characterized by XRD,SEM,NMR,and XPS.The study of acid-base characteristics of the systems with different Mg/(Al+Ce)ratio by NH3/CO_(2)quasi-equilibrium thermal desorption techniques shows that the ratio of the catalyst oxide components(Mg,Al,Ce)can provide acid/base capacity ratio close to 3 for the effectivity of the target process.The highest selectivity 68%is reached over Mg-Al-Ce oxide catalyst with the ratio of Mg/(Al+Ce)=2.
