检索结果-南通市图书馆

Mechanochemical synthesis of MAPbBr_(3)/carbon sphere composites for boosting carrier-involved superoxide species

Journal of Environmental Sciences 2021年第6期33卷 399-414页

作者： Qun Wang Ming Ma Kai Cui Xiaochen Li Yan Zhou Yang Li xiaohong wu School of Chemistry and Chemical Engineering MIITKey Laboratory of Critical Materials Technology for New Energy Conversion and StorageHarbin Institute of TechnologyHarbin 150001China

Lead halide perovskites MAPbX_(3)(MA = CH_(3)NH_(3) or Cs;X = I, Br, Cl) are well considered to be potential candidates for photocatalytic reaction due to its excellent photoelectrical properties, but they still suffer from the low charge separation efficiency and slow catalytic reaction dynamics. To tackle the drawbacks, herein, MAPbBr_(3)/carbon sphere(CS) composite photocatalysts using glucose as the carbon source were elaborately designed and fabricated via a dry mechanochemical grinding process. The interfacial interaction Pb-O-C chemical bonds were constructed between MAPbBr_(3) and the carbon sphere surface containing organic functional groups. By optimizing the content of CSs, the enhanced photocatalytic degradation kinetic rate of Malachite Green(MG) pollutants(92% within 20 min) for MAPbBr_(3)/CS x( x = 17 wt.%) is about 3.6-fold of that for pristine MAPbBr_(3), which is attributed to the corporative adsorption and enhanced carrier transportation and separation of MAPbBr_(3)/CS x. Furthermore, the possible degradation mechanism was proposed on basis of the electrochemical, mass spectrometry and optical characterization results. Owing to the robust interfacial interaction, effective electron extraction rate( k et = 4.6 × 10^(7) sec^(-1)) from MAPbBr_(3) to CS can be established, which driven oxygen activation where superoxide radicals(·O^(2-)) played an important role in MG degradation. It is expected that mechanochemistry strategy may provide a new route to design efficient lead halide perovskite-carbon or metal oxide or sulfide composite photocatalysts.

关键词： Lead halide perovskites Carbon sphere Mechanochemistry Carrier separation Superoxide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

2022年金华市儿童预防接种门诊服务能力现况调查

引用

中国公共卫生管理 2024年第2期40卷 222-225页

作者：吴晓虹胡美娟陈梦安金华市疾病预防控制中心浙江金华321002 浙江省永康市疾病预防控制中心

目的分析金华市儿童预防接种门诊现状,评价预防接种服务能力。方法选取金华市158家儿童预防接种门诊为调查对象,设计调查问卷,对2022年各儿童预防接种门诊相关情况进行调查。结果金华市158家儿童预防接种门诊规范化覆盖率达到100.00%。... 详细信息

目的分析金华市儿童预防接种门诊现状,评价预防接种服务能力。方法选取金华市158家儿童预防接种门诊为调查对象,设计调查问卷,对2022年各儿童预防接种门诊相关情况进行调查。结果金华市158家儿童预防接种门诊规范化覆盖率达到100.00%。平均每家门诊配置5.29名工作人员,专职人员占59.33%;男女性别比为1∶8.28;年龄以30~40岁年龄组为主,占47.37%;学历以大学本科为主,占68.06%;中级以上职称占52.15%;工作人员与服务人口比值为1.05/万。疫苗冷链设备均配备自动测温报警系统,98.00%的冰箱为医用冰箱。客流智能管理系统覆盖率为46.84%,34.18%的门诊认为疑似预防接种异常反应处置水平不高。结论金华市儿童预防接种门诊能够满足辖区预防接种服务需求,但存在工作人员数量不足、数字化门诊建设落后、疑似预防接种异常反应处置水平不高等问题,今后仍需进一步优化门诊服务及资源的配置。

关键词：儿童预防接种门诊服务能力配置

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

新生儿缺氧缺血性脑病患儿血清DNMT1、DNMT3a和BDNF检测对预后评估的临床价值

引用

四川医学 2024年第8期45卷 886-890页

作者：颜海峰霍开明吴小红周家仍海南医学院第二附属医院儿科二区海南海口570311

目的探讨血清DNA甲基化转移酶(DNMT)1、DNMT3a和脑源性神经营养因子(BDNF)检测在新生儿缺氧缺血性脑病(HIE)患儿预后评估中的价值。方法选取2016年1月至2023年1月在我院诊治的84例新生儿HIE患儿为观察组,并选取同期84例于我院出生的健... 详细信息

目的探讨血清DNA甲基化转移酶(DNMT)1、DNMT3a和脑源性神经营养因子(BDNF)检测在新生儿缺氧缺血性脑病(HIE)患儿预后评估中的价值。方法选取2016年1月至2023年1月在我院诊治的84例新生儿HIE患儿为观察组,并选取同期84例于我院出生的健康新生儿为对照组。根据患儿病情程度分为轻度组36例、中度组28例、重度组20例。采用酶联免疫吸附(ELISA)法检测血清DNMT1、DNMT3a和BDNF水平;多因素Logistic回归分析新生儿HIE患儿预后的影响因素;受试者工作特征(ROC)曲线分析血清DNMT1、DNMT3a和BDNF水平对新生儿HIE患儿预后的预测价值。结果与对照组相比,轻度、中度、重度组新生儿HIE患儿血清DNMT1、DNMT3a水平依次升高(P<0.05),BDNF水平依次降低(P<0.05);与预后良好组相比,预后不良组新生儿HIE患儿血清DNMT1、DNMT3a水平升高(P<0.05),BDNF水平降低(P<0.05);多因素Logistic回归分析发现,病情程度、DNMT1、DNMT3a是影响新生儿HIE患儿预后的危险因素(P<0.05),新生儿Apgar评分、BDNF是影响患儿预后的保护因素(P<0.05);血清DNMT1、DNMT3a、BDNF联合检测预测新生儿HIE患儿预后的ROC曲线下面积(AUC)为0.955,均优于其各自单独预测(Z_(联合检测-DNMT1)=2.046,P=0.020;Z_(联合检测-DNMT3a)=3.046,P=0.001;Z_(联合检测-BDNF)=2.073,P=0.019)。结论新生儿HIE患儿血清DNMT1、DNMT3a水平升高,BDNF水平降低,在新生儿HIE患儿预后评估中具有一定价值。

关键词：新生儿缺氧缺血性脑病 DNMT1 DNMT3a BDNF 预后

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

新诊断2型糖尿病患者亚临床颈动脉粥样硬化的影响因素及综合治疗后的转归情况

引用

南京医科大学学报（自然科学版） 2024年第7期44卷 927-933页

作者：王祎洁徐汉文张文琼周洁茹金晶武晓泓锦州医科大学研究生学院辽宁锦州121001 浙江省人民医院内分泌科浙江杭州310014 嘉善县第一人民医院内分泌科浙江嘉善314100 蚌埠医学院研究生学院安徽蚌埠233030 浙江中医药大学研究生学院浙江杭州310053

目的:探讨新诊断2型糖尿病(type 2 diabetes mellitus,T2DM)患者亚临床颈动脉粥样硬化(subclinical carotid atherosclerosis,SCAS)的相关影响因素及综合治疗后的转归情况。方法:收集402例新诊断T2DM患者的资料,根据有无SCAS进行分组,... 详细信息

目的:探讨新诊断2型糖尿病(type 2 diabetes mellitus,T2DM)患者亚临床颈动脉粥样硬化(subclinical carotid atherosclerosis,SCAS)的相关影响因素及综合治疗后的转归情况。方法:收集402例新诊断T2DM患者的资料,根据有无SCAS进行分组,比较两组间各项指标的差异。采用二元Logistic回归分析新诊断T2DM合并SCAS的影响因素,利用受试者工作特征(receiver operating characteristic,ROC)曲线分析危险因素的截断值。对其中72例患者进行随访,比较综合治疗前后代谢指标达标情况及SCAS检出率。结果:402例新诊断T2DM住院患者中SCAS检出率为57.0%(229/402)。SCAS组与无SCAS组比较,糖尿病周围神经病变(diabetic peripheral neuropathy,DPN)、糖尿病视网膜病变(diabetic retinopathy,DR)、估算的肾小球滤过率(estimated glomerular filtration rate,eGFR)、甘油三酯(triglyceride,TG)、体重指数(body mass index,BMI)、心率的差异均有统计学意义(P <0.05)。二元Logistic回归分析结果显示,新诊断T2DM合并SCAS的独立影响因素包括DPN、DR、eGFR、BMI(P <0.05)。ROC曲线分析显示,eGFR截断值为103.50 mL/(min·1.73 m2),BMI截断值为27.32 kg/m2。与基线相比,干预1年后患者的颈动脉内膜-中膜厚度(carotid intima-media thickness,CIMT)、SCAS检出率及代谢指标有明显改善,两组之间差异有统计学意义(P <0.05)。结论:新诊断T2DM住院患者SCAS检出率高,DPN、DR与新诊断T2DM合并SCAS风险呈正相关,BMI升高、eGFR下降是新诊断T2DM合并SCAS的独立危险因素。综合治疗可改善新诊断T2DM患者的代谢指标、缓解CIMT增厚、降低SCAS检出率,但颈动脉斑块未得到明显改善。

关键词：新诊断2型糖尿病慢性微血管并发症亚临床颈动脉粥样硬化

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Electrospun naringin-loaded microsphere/sucrose acetate isobutyrate system promotes macrophage polarization toward M2 and facilitates osteoporotic bone defect repair

引用

Regenerative Biomaterials 2023年第1期10卷 470-485页

作者： Jihong Li Jinlin Song Di Meng Yin Yi Ting Zhang Yu Shu xiaohong wu Stomatological Hospital of Chongqing Medical University No.426 Songshibei RoadYubei DistrictChongqing 401147China Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences Chongqing 401147China Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing 401147China

Repairing osteoporotic bone defects is still a major clinical *** studies have revealed that immune response is also essential in *** intrinsic inflammatory response of the host,especially the M1/M2 polarization status and inflammatory secretory function of macrophages,can directly affect osteogenic ***,in this study,an electrospun naringin-loaded microspheres/sucrose acetate isobutyrate(Ng-m-SAIB)system was constructed to investigate its effect on the polarization of macrophage and osteoporotic bone *** results of both in vitro and in vivo experiments showed that Ng-m-SAIB had good biocompatibility and could promote the polarization of macrophage toward M2,thereby forming a favorable microenvironment for *** animal experiments also showed that Ng-m-SAIB could promote the osteogenesis of critical size defects in the skull of the osteoporotic model mouse(the senescence-accelerated mouse-strain P6).Together,these results collectively suggested that Ng-m-SAIB might be a promising biomaterial to treat osteoporotic bone defects with favorable osteo-immunomodulatory effects.

关键词： electrospun microspheres macrophage polarization Ng-m-SAIB osteoporotic bone defects

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrolyte for lithium protection: From liquid to solid

引用

Green Energy & Environment 2019年第4期4卷 360-374页

作者： xiaohong wu Kecheng Pan Mengmin Jia Yufei Ren Hongyan He Lan Zhang Suojiang Zhang CAS Key Laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemical Engineering&Technology Tianjin UniversityTianjin 300072China

Lithium battery with high energy density and enhanced safety is undoubtedly the ideal choice for consumer electronics and electric *** anode such as lithium has been considered as the most effective way to enhance the energy density as it provides ultra-high theoretical capacity and the lowest redox ***,due to the low coulombic efficiency as well as safety concerns originated from dendrite issue of lithium,its further commercial utilization is *** growth is a common phenomenon in metal electrodeposition while the plating process of Li is more complicated than other metals for its high reactivity *** a matter of fact,the Li plating process is accompanied with the generation of solid electrolyte interphase(SEI)in which the electrolyte plays a vital *** this paper,recent advances of electrolytes for Li protect application are reviewed,from liquid to gel polymer and solid state,on which we find that although tremendous progress has been accomplished,there are still great challenges before Li metal anode could be commercially used.

关键词： Lithium battery Dendrite Lithium protection Electrolyte SEI

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of the ecological environment around 10000 a BP in Zhaitang area,Beijing:A case study of the Donghulin Site

引用

Chinese Science Bulletin 2012年第4期57卷 360-369页

作者： XIA ZhengKai ZHANG JunNa LIU Jing ZHAO ChaoHong wu xiaohong School of Urban and Environmental Science Peking UniversityBeijing 100871China School of Archaeology and Museology Peking UniversityBeijing 100871China

The transition from Paleolithic to Neolithic around 10000 a BP was a significant event in human history. We have analyzed the paleoenvironment in the Zhaitang area (Beijing) based on samples from an early Neolithic site at Donghulin. This site is considered to demonstrate the Paleolithic-Neolithic transition in this area. The site yielded burials with several human skeletons, known as "Donghulin man". We conducted a geomorphological and quaternary geological investigation in the Donghulin area, and also analyzed sediments and pollen, enabling us to discuss the living environment of the local people. Donghulin man lived mainly from 11100-9600 cal a BP; a period of warming following the Younger Dryas. The climate was good, the land was covered by dry temperate grassland, and later, wet temperate meadow steppe. "Donghulin man" usually inhabited the floodplain; this was flat, warm, and wet, with abundant plants and animals for a favorable living environment. Our research helps to rebuild the living environment of humans in the Beijing area around 10000 a BP, and to understand more about the environmental setting in north China during the Paleolithic-Neolithic transition.

关键词：北京地区生态环境分析 BP 新石器时代旧石器时代生活环境遗址案例

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

土壤自养固碳微生物研究进展与热点分析

引用

广西林业科学 2024年第1期53卷 124-134页

作者：张亚茹申振涛吴小红廖清颖中南林业科技大学生命科学与技术学院湖南长沙410004

随着全球气候变暖加剧,减少大气中二氧化碳(CO_(2))排放量、提高陆地生态系统碳储量已成为全球关注的焦点。土壤中存在大量自养微生物,具有将大气中CO_(2)转化成有机物质的能力,对提高土壤碳吸收和碳储量有重要意义。探究土壤自养固碳... 详细信息

随着全球气候变暖加剧,减少大气中二氧化碳(CO_(2))排放量、提高陆地生态系统碳储量已成为全球关注的焦点。土壤中存在大量自养微生物,具有将大气中CO_(2)转化成有机物质的能力,对提高土壤碳吸收和碳储量有重要意义。探究土壤自养固碳微生物研究的发展与趋势,展示其知识结构和知识演化过程,可为后续研究提供参考和启示。采用VOSviewer软件对1991—2023年发表在Web of Science核心合集数据库中的文献进行分析,通过分析发文量、作者合作共现、机构合作、国家分布、关键词共现及关键词聚类和演变趋势等,系统梳理土壤自养固碳微生物研究的现状与发展趋势。结果表明,土壤自养固碳微生物研究在2016年后蓬勃发展,中国和美国学者是重要的研究力量;中国为发文量最多的国家,中国科学院为发文量最多的研究机构。热门的研究方向为自养微生物固碳潜力、固碳途径、功能种群及其固碳过程的调控机制等。在系统阐述土壤自养固碳微生物研究发展态势基础上,提出未来可能的重要研究方向,有助于该研究的发展。

关键词：自养微生物文献计量前沿热点可视化分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High rate and cycling stable Li metal anodes enabled with aluminum-zinc oxides modified copper foam

引用

Journal of Energy Chemistry 2020年第2期29卷 87-92页

作者： Songtao Lu Zhida Wang He Yan Rui Wang Ke Lu Yingwen Cheng Wei Qin xiaohong wu MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Department of Chemistry and Biochemistry Northern Illinois UniversityDekalb 60115ILUnited States

Metallic Li is a promising anode material for high energy density batteries but it suffers from poor stability and formation of unsafe dendrites. Previous studies demonstrated that 3 D metal foams are able to improve the stability of Li metal but the properties of these foams are inherently limited. Here we report a facile surface modification approach via magnetron sputtering of mixed oxides that effectively modulate the properties of Cu foams for supporting Li metal with remarkable stability. We discovered that hybrid Li anodes with Li metal thermally infused to aluminum-zinc oxides(AZO) coated Cu foams have significantly improved stability and reactivity compared with pristine Li foils and Li infused to unmodified Cu foams. Full cells assembled with a Li Fe PO4 cathode and a hybrid anode maintained low and stable charge-transfer resistance(<50) during 500 cycles in carbonate electrolytes, and exhibited superior rate capability(~100 m Ah g-1 at 20 C) along with better electrochemical reversibility and surface stability. The AZO modified Cu foams had superior mechanical strength and afforded the hybrid anodes with minimized volume change without the formation of dendrites during battery cycling. The rational construction of surface architecture to precisely control Li plating and stripping may have great implications for the practical applications of Li metal batteries.

关键词： Composite Lianode Metal foams Surface modification Limetal batteries 3D current collector

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fault-tolerant identity-based encryption from SM9

引用

Science China(Information Sciences) 2024年第2期67卷 104-117页

作者： xiaohong LIU Xinyi HUANG Zhaohui CHENG Wei wu Fujian Provincial Key Laboratory of Network Security and Cryptology College of Computer and Cyber SecurityFujian Normal University Artificial Intelligence Thrust Information HubThe Hong Kong University of Science and Technology (Guangzhou) Olym Information Security Technology Ltd. Center for Applied Mathematics of Fujian Province School of Mathematics and StatisticsFujian Normal University

This paper initiates the formal study of attribute-based encryption within the framework of SM9,the Chinese National Cryptography Standard for Identity-Based Cryptography, by presenting two new faulttolerant identity-based encryption(FIBE) schemes. Our first scheme uses the same private-key/ciphertext structure as the original SM9 algorithm and operates in a small attribute universe. As a result, it can be effectively and smoothly integrated into the information systems using SM9. In the random oracle model,we prove that our scheme is ciphertext-indistinguishable against fuzzy selective-identity and chosen-plaintext attacks under the(k + 3)-DBDHI assumption. Our second design is a large universe FIBE scheme based on SM9 that is ciphertext-indistinguishable against chosen-plaintext attacks in the random oracle model under the(f, g)-GDDHE assumption. Finally, we compare the communication and computing costs of our schemes to those of other classical ones. The comparison shows that our schemes have comparable performance as others. We believe that our findings will accelerate the applications of SM9 in modern information systems such as cloud computing and blockchain.

关键词： attribute-based encryption identity-based encryption fault-tolerant SM9

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：