Reducing nitrogen to ammonia with solar energy has become a wide concern when it comes to photocatalysis research.It is considered to be one of the more promising alternate options for the conventional Haber-Bosch cyc...Reducing nitrogen to ammonia with solar energy has become a wide concern when it comes to photocatalysis research.It is considered to be one of the more promising alternate options for the conventional Haber-Bosch cycle.Herein,2D g-C_(3)N_(4)composites with modifying ultrathin sheet MnO_(2-x)were prepared and used as nitrogen fixation photocatalyst.With the assistance of the nature of MnO_(2-x),the generation rate of NH_(3)reached 225 mmol g^(-1)h^(-1),which is more than twice over the rate of pristine 2D g-C_(3)N_(4)(107 mmol g^(-1)h^(-1)).The presence of ultrathin sheet MnO_(2-x)shortens the gap of the carriers to the surface of photocatalyst.Thus the speed of electron transfer gets increased.Besides,the construction of Z-scheme heterojunction boosts the separation and migration of photogenerated carriers.As a result,the nitrogen reduction reaction(NRR)performance gets enhanced.The work may provide an example of promoting the NRR performance of non-metallic compound.展开更多
目的 探讨脑胶质瘤组织中叉头框C1 (FOXC1) m RNA表达水平及其与预后的相关性。方法 基于TCGA数据库中下载脑胶质瘤的基因表达谱数据和患者的临床-病理资料,比较701例脑胶质瘤组织及50例正常脑组织中FOXC1 m RNA表达水平的差异,多因素CO...目的 探讨脑胶质瘤组织中叉头框C1 (FOXC1) m RNA表达水平及其与预后的相关性。方法 基于TCGA数据库中下载脑胶质瘤的基因表达谱数据和患者的临床-病理资料,比较701例脑胶质瘤组织及50例正常脑组织中FOXC1 m RNA表达水平的差异,多因素COX回归分析胶质瘤患者预后的危险因素,采用K-M曲线分析胶质瘤组织中FOXC1表达和总体生存率的关系,利用TIMER数据库分析胶质瘤组织中FOXC1表达与免疫细胞浸润程度的相关性。纳入我科20例脑胶质瘤患者和20例脑外伤患者作为研究对象,采用免疫组化法探讨胶质瘤组织及正常脑组织中FOXC1阳性表达率的差异。结果 脑胶质瘤组织和正常脑组织中FOXC1 mRNA表达水平分别为1.87 (1.54,2.16)和1.61 (1.14,1.92),与正常脑组织比较,脑胶质瘤组织中FOXC1 m RNA表达水平显著升高,差异有显著统计学意义(P<0.01)。脑胶质瘤中FOXC1高表达和低表达患者的中位生存时间分别为933 d和2 835 d,脑胶质瘤中FOXC1高表达生存率显著降低(HR=1.76,95%CI:1.25~2.49,P=0.001)。经多因素COX回归分析证实,年龄(>40周岁)、WHO分级(G3)、IDH状态(突变型)、1p/19q共缺失(非共缺失)和FOXC1表达(高表达)是胶质瘤患者预后的独立影响因素。脑胶质瘤组织中FOXC1 m RNA表达和中性粒细胞(r=0.433,P<0.01)、巨噬细胞(r=0.400,P<0.01)、嗜酸性细胞(r=0.365,P<0.01)等细胞浸润程度呈显著正相关,与Tgd细胞(r=-0.115,P<0.05)、TFH细胞(r=-0.158,P<0.01)及pDC细胞(r=-0.207,P<0.01)浸润程度呈显著负相关。免疫组化证实,20例胶质瘤组织中FOXC1高度阳性表达14例,中度阳性表达6例,正常的脑组织中FOXC1无表达,差异具有显著统计学意义(P<0.01)。结论 FOXC1在脑胶质瘤组织中显著高表达,且FOXC1高表达与患者的不良预后相关,FOXC1可作为脑胶质瘤治疗的一个靶向标志物。展开更多
Due to the abundance and sustainability of solar energy,converting it into chemical energy to obtain clean energy presents an ideal solution for addressing environmental pollution and energy shortages stemming from th...Due to the abundance and sustainability of solar energy,converting it into chemical energy to obtain clean energy presents an ideal solution for addressing environmental pollution and energy shortages stemming from the extensive combustion of fossil fuels.In recent years,hydrogen energy has emerged on the stage of history as the most promising clean energy carrier of the 21st century.Among the current methods of producing hydrogen,photocatalytic hydrogen production technology,as a zero-carbon approach to producing high calorific value and pollution-free hydrogen energy,has attracted much attention since its discovery.As the core of photocatalysis technology,semiconductor photocatalysts are always the research hotspots.Among them,graphite-phase carbon nitride(g-C_(3)N_(4)),an organic semiconductor material composed of only C and N elements,possesses physicochemical properties incomparable to those of traditional inorganic semiconductor materials,including suitable energy band positions,easy structural regulation,inexpensive raw materials and abundant reserves,simple preparation,high thermal/mechanical/chemical stability,etc.Therefore,g-C_(3)N_(4) has attracted extensive attention in the field of photocatalytic hydrogen production in the last two decades.This review comprehensively outlines the research trajectory of g-C_(3)N_(4) photocatalytic hydrogen production,encompassing development,preparation methods,advantages,and disadvantages.A concise introduction to g-C_(3)N_(4) is provided,as well as an analysis of the underlying mechanism of the photocatalytic system.Additionally,it delves into the latest techniques to enhance performance,including nanostructure design,elemental doping,and heterojunction construction.The applications of g-C_(3)N_(4) based photocatalysts in hydrogen production are surveyed,underscoring the significance of catalyst active sites and g-C_(3)N_(4) synthesis pathways.At length,concluded are insights into the challenges and opportunities presented by g-C_(3)N_(4) based photocatalysts for achieving heightened hydrogen production.展开更多
基金supported by National Natural Science Foundation of China(21776118,21808090)Natural Science Foundation of Jiangsu Province(BK20190981)+3 种基金Jiangsu Fund for Distinguished Young Scientists(BK20190045)China Postdoctoral Science Foundation(2019M661765)High-tech Research Key laboratory of Zhenjiang(SS2018002)A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions,the high-performance computing platform of Jiangsu University。
文摘Reducing nitrogen to ammonia with solar energy has become a wide concern when it comes to photocatalysis research.It is considered to be one of the more promising alternate options for the conventional Haber-Bosch cycle.Herein,2D g-C_(3)N_(4)composites with modifying ultrathin sheet MnO_(2-x)were prepared and used as nitrogen fixation photocatalyst.With the assistance of the nature of MnO_(2-x),the generation rate of NH_(3)reached 225 mmol g^(-1)h^(-1),which is more than twice over the rate of pristine 2D g-C_(3)N_(4)(107 mmol g^(-1)h^(-1)).The presence of ultrathin sheet MnO_(2-x)shortens the gap of the carriers to the surface of photocatalyst.Thus the speed of electron transfer gets increased.Besides,the construction of Z-scheme heterojunction boosts the separation and migration of photogenerated carriers.As a result,the nitrogen reduction reaction(NRR)performance gets enhanced.The work may provide an example of promoting the NRR performance of non-metallic compound.
文摘目的 探讨脑胶质瘤组织中叉头框C1 (FOXC1) m RNA表达水平及其与预后的相关性。方法 基于TCGA数据库中下载脑胶质瘤的基因表达谱数据和患者的临床-病理资料,比较701例脑胶质瘤组织及50例正常脑组织中FOXC1 m RNA表达水平的差异,多因素COX回归分析胶质瘤患者预后的危险因素,采用K-M曲线分析胶质瘤组织中FOXC1表达和总体生存率的关系,利用TIMER数据库分析胶质瘤组织中FOXC1表达与免疫细胞浸润程度的相关性。纳入我科20例脑胶质瘤患者和20例脑外伤患者作为研究对象,采用免疫组化法探讨胶质瘤组织及正常脑组织中FOXC1阳性表达率的差异。结果 脑胶质瘤组织和正常脑组织中FOXC1 mRNA表达水平分别为1.87 (1.54,2.16)和1.61 (1.14,1.92),与正常脑组织比较,脑胶质瘤组织中FOXC1 m RNA表达水平显著升高,差异有显著统计学意义(P<0.01)。脑胶质瘤中FOXC1高表达和低表达患者的中位生存时间分别为933 d和2 835 d,脑胶质瘤中FOXC1高表达生存率显著降低(HR=1.76,95%CI:1.25~2.49,P=0.001)。经多因素COX回归分析证实,年龄(>40周岁)、WHO分级(G3)、IDH状态(突变型)、1p/19q共缺失(非共缺失)和FOXC1表达(高表达)是胶质瘤患者预后的独立影响因素。脑胶质瘤组织中FOXC1 m RNA表达和中性粒细胞(r=0.433,P<0.01)、巨噬细胞(r=0.400,P<0.01)、嗜酸性细胞(r=0.365,P<0.01)等细胞浸润程度呈显著正相关,与Tgd细胞(r=-0.115,P<0.05)、TFH细胞(r=-0.158,P<0.01)及pDC细胞(r=-0.207,P<0.01)浸润程度呈显著负相关。免疫组化证实,20例胶质瘤组织中FOXC1高度阳性表达14例,中度阳性表达6例,正常的脑组织中FOXC1无表达,差异具有显著统计学意义(P<0.01)。结论 FOXC1在脑胶质瘤组织中显著高表达,且FOXC1高表达与患者的不良预后相关,FOXC1可作为脑胶质瘤治疗的一个靶向标志物。
基金supported by the National Natural Science Foundation of China(22202086,22208129)Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJCX23_2070)College Student Innovation and Practice Fund of Industrial Center of Jiangsu University(ZXJG2022002).
文摘Due to the abundance and sustainability of solar energy,converting it into chemical energy to obtain clean energy presents an ideal solution for addressing environmental pollution and energy shortages stemming from the extensive combustion of fossil fuels.In recent years,hydrogen energy has emerged on the stage of history as the most promising clean energy carrier of the 21st century.Among the current methods of producing hydrogen,photocatalytic hydrogen production technology,as a zero-carbon approach to producing high calorific value and pollution-free hydrogen energy,has attracted much attention since its discovery.As the core of photocatalysis technology,semiconductor photocatalysts are always the research hotspots.Among them,graphite-phase carbon nitride(g-C_(3)N_(4)),an organic semiconductor material composed of only C and N elements,possesses physicochemical properties incomparable to those of traditional inorganic semiconductor materials,including suitable energy band positions,easy structural regulation,inexpensive raw materials and abundant reserves,simple preparation,high thermal/mechanical/chemical stability,etc.Therefore,g-C_(3)N_(4) has attracted extensive attention in the field of photocatalytic hydrogen production in the last two decades.This review comprehensively outlines the research trajectory of g-C_(3)N_(4) photocatalytic hydrogen production,encompassing development,preparation methods,advantages,and disadvantages.A concise introduction to g-C_(3)N_(4) is provided,as well as an analysis of the underlying mechanism of the photocatalytic system.Additionally,it delves into the latest techniques to enhance performance,including nanostructure design,elemental doping,and heterojunction construction.The applications of g-C_(3)N_(4) based photocatalysts in hydrogen production are surveyed,underscoring the significance of catalyst active sites and g-C_(3)N_(4) synthesis pathways.At length,concluded are insights into the challenges and opportunities presented by g-C_(3)N_(4) based photocatalysts for achieving heightened hydrogen production.
文摘目的 探讨右美托咪定对小儿七氟烷全身麻醉围术期血流动力学、应激反应、炎症因子水平的影响。方法 遴选时段2020年8月至2021年4月内深圳市坪山区妇幼保健院100例择期手术患儿,均实施七氟烷全身麻醉,参考随机数字表法将研究对象分为对照组和观察组[每组各50例,观察组术中静脉给予1μg/kg右美托咪定,维持1μg·kg^(-1)·h^(-1)泵入,对照组等剂量0.9%氯化钠注射液静脉注射。对比结果:应激反应指标[肾上腺素、去甲肾上腺素(NE)]、不同时刻血流动力学指标[平均动脉压(MVP)、心率(HR)]、炎症因子水平[C反应蛋白(CRP)、肿瘤坏死因子(TNF-α)、白细胞介素-6(IL-6)],统计2组患者苏醒时间、拔管时间、躁动发生率。结果观察组气管插管后1 min至拔管后5 min MVP、HR较同时刻对照组均更低(P<0.05);观察组气管插管时至术后12 h肾上腺素、NE水平较对照组均更低(P<0.05);从入室时至术后12 h 2组血清CRP、TNF-α、IL-6水平均逐渐升高,且观察组较同时刻对照组炎症因子水平明显低(P<0.05)。观察组苏醒期躁动发生率较对照组更低(P<0.05)。结论 右美托咪定应用于小儿七氟烷全身麻醉中,不仅可稳定血流动力学,控制炎症因子及应激反应,同时降低苏醒期躁动的发生,提高麻醉安全性。
