Utilizing the hydrazine-assisted water electrolysis for energy-efficient hydrogen production shows a promising application, which relies on the development and design of efficient bifunctional electrocatalysts. Herein...Utilizing the hydrazine-assisted water electrolysis for energy-efficient hydrogen production shows a promising application, which relies on the development and design of efficient bifunctional electrocatalysts. Herein, we reported a low-content Pt-doped Rh metallene(Pt-Rhene) for hydrazine-assisted water electrolysis towards energy-saving hydrogen(H_(2)) production, where the ultrathin metallene is constructed to provide enough favorable active sites for catalysis and improve atom utilization.Additionally, the synergistic effect between Rh and Pt can optimize the electronic structure of Rh for improving the intrinsic activity. Therefore, the required overpotential of Pt-Rhene is only 37 mV to reach a current density of-10 mA cm^(-2) in the hydrogen evolution reaction(HER), and the Pt-Rhene exhibits a required overpotential of only 11 mV to reach a current density of 10 mA cm^(-2) in the hydrazine oxidation reaction(HzOR). With the constructed HER-HzOR two-electrode system, the Pt-Rhene electrodes exhibit an extremely low voltage(0.06/0.19/0.28 V) to achieve current densities of 10/50/100 mA cm^(-2) for energy-saving H_(2) production, which greatly reduces the electrolysis energy consumption. Moreover,DFT calculations further demonstrate that the introduction of Pt modulates the electronic structure of Rh and optimizes the d-band center, thus enhancing the adsorption and desorption of reactant/intermediates in the electrocatalytic reaction.展开更多
目的探讨竹节参总皂苷(saponins of Panax Japonicus,SPJ)改善高脂饮食诱导的小鼠睾丸生殖功能障碍的作用及机制。方法采用血球计数板于光镜下进行精子计数,伊红Y染色法检测精子存活率;苏木精伊红(HE)染色法检测小鼠睾丸组织形态;TUNEL...目的探讨竹节参总皂苷(saponins of Panax Japonicus,SPJ)改善高脂饮食诱导的小鼠睾丸生殖功能障碍的作用及机制。方法采用血球计数板于光镜下进行精子计数,伊红Y染色法检测精子存活率;苏木精伊红(HE)染色法检测小鼠睾丸组织形态;TUNEL法检测睾丸生精细胞的凋亡;Westernblot法检测睾丸组织内p-NF-κB及其下游炎症因子肿瘤坏死因子α(TNF-α)和白细胞介素1β(IL-1β)的蛋白表达水平;免疫荧光法检测睾丸巨噬细胞数量。结果SPJ可减轻高脂饮食小鼠的体质量,提高睾丸和附睾的质量及其指数,提高精子存活率和精子数量,改善生精小管形态并减轻生精细胞的凋亡,明显下调p-NF-κB、TNF-α和IL-1β的蛋白表达水平,减少睾丸巨噬细胞的数量。结论SPJ对高脂饮食小鼠睾丸生殖功能障碍有明显改善作用,其机制可能与减轻巨噬细胞浸润,抑制NF-κB通路介导的睾丸炎症有关。展开更多
从Nrf2信号通路探讨淫羊藿苷(icariin,ICA)对D-半乳糖(D-galactose,D-Gal)诱导的小鼠睾丸支持细胞株15P-1细胞损伤的保护作用。将15P-1细胞分为对照组(control)、150 mM D-Gal处理组、D-Gal+ICA(0.5μM)组和D-Gal+ICA(1.0μM)组。RT-PC...从Nrf2信号通路探讨淫羊藿苷(icariin,ICA)对D-半乳糖(D-galactose,D-Gal)诱导的小鼠睾丸支持细胞株15P-1细胞损伤的保护作用。将15P-1细胞分为对照组(control)、150 mM D-Gal处理组、D-Gal+ICA(0.5μM)组和D-Gal+ICA(1.0μM)组。RT-PCR法和Western blot法检测15P-1细胞分泌的相关因子GDNF、BMP4和SCF mRNA和蛋白的表达水平。Western blot法检测15P-1细胞紧密连接相关蛋白Occludin和Claudin-1、Nrf2信号通路相关蛋白Nrf2、HO-1和NQO-1的蛋白表达水平。免疫荧光法检测Nrf2表达及定位。与对照组相比,D-Gal处理组15P-1细胞分泌的相关因子GDNF、BMP4和SCF的mRNA和蛋白表达水平均显著下降,而给予ICA后均显著升高。此外,与对照组相比,D-Gal处理组15P-1细胞Occludin、Claudin-1、Nrf2、HO-1和NQO-1的蛋白表达水平均显著下降,而ICA可显著上调上述相关蛋白的表达。免疫荧光结果进一步显示,ICA可上调15P-1细胞核内Nrf2蛋白表达。ICA可减轻D-Gal诱导的15P-1细胞损伤,并改善其功能,其机制可能与上调Nrf2信号通路相关蛋白有关。展开更多
基金financially supported by the National Natural Science Foundation of China (No. 21972126, 21978264, 21905250, and 22278369)the Natural Science Foundation of Zhejiang Province (No. LQ22B030012 and LQ23B030010)the China Postdoctoral Science Foundation (2021M702889)。
文摘Utilizing the hydrazine-assisted water electrolysis for energy-efficient hydrogen production shows a promising application, which relies on the development and design of efficient bifunctional electrocatalysts. Herein, we reported a low-content Pt-doped Rh metallene(Pt-Rhene) for hydrazine-assisted water electrolysis towards energy-saving hydrogen(H_(2)) production, where the ultrathin metallene is constructed to provide enough favorable active sites for catalysis and improve atom utilization.Additionally, the synergistic effect between Rh and Pt can optimize the electronic structure of Rh for improving the intrinsic activity. Therefore, the required overpotential of Pt-Rhene is only 37 mV to reach a current density of-10 mA cm^(-2) in the hydrogen evolution reaction(HER), and the Pt-Rhene exhibits a required overpotential of only 11 mV to reach a current density of 10 mA cm^(-2) in the hydrazine oxidation reaction(HzOR). With the constructed HER-HzOR two-electrode system, the Pt-Rhene electrodes exhibit an extremely low voltage(0.06/0.19/0.28 V) to achieve current densities of 10/50/100 mA cm^(-2) for energy-saving H_(2) production, which greatly reduces the electrolysis energy consumption. Moreover,DFT calculations further demonstrate that the introduction of Pt modulates the electronic structure of Rh and optimizes the d-band center, thus enhancing the adsorption and desorption of reactant/intermediates in the electrocatalytic reaction.
文摘目的探讨竹节参总皂苷(saponins of Panax Japonicus,SPJ)改善高脂饮食诱导的小鼠睾丸生殖功能障碍的作用及机制。方法采用血球计数板于光镜下进行精子计数,伊红Y染色法检测精子存活率;苏木精伊红(HE)染色法检测小鼠睾丸组织形态;TUNEL法检测睾丸生精细胞的凋亡;Westernblot法检测睾丸组织内p-NF-κB及其下游炎症因子肿瘤坏死因子α(TNF-α)和白细胞介素1β(IL-1β)的蛋白表达水平;免疫荧光法检测睾丸巨噬细胞数量。结果SPJ可减轻高脂饮食小鼠的体质量,提高睾丸和附睾的质量及其指数,提高精子存活率和精子数量,改善生精小管形态并减轻生精细胞的凋亡,明显下调p-NF-κB、TNF-α和IL-1β的蛋白表达水平,减少睾丸巨噬细胞的数量。结论SPJ对高脂饮食小鼠睾丸生殖功能障碍有明显改善作用,其机制可能与减轻巨噬细胞浸润,抑制NF-κB通路介导的睾丸炎症有关。
