检索结果-南通市图书馆

Enhancing capacitive deionization performance and cyclic stability of nitrogen-doped activated carbon by the electro-oxidation of anode materials

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第5期69卷 23-33页

作者： xiaona Liu Baohua Zhao Yanyun Hu Luyue Huang Jingxiang Ma Shuqiao xu Zhonglin Xia Xiaoying Ma Shuangchen Ma School of Environmental Science and Engineering North China Electric Power UniversityBaoding 071003China Huadian Zhengzhou Machinery Design and Research Institute Co. LtdZhengzhou 450002China Huadian Inner Mongolia Energy Co. Ltd.Baotou Power Generation BranchBaotou 014013China

Electrode materials with high desalination capacity and long-term cyclic stability are the focus of capacitive deionization(CDI) community. Understanding the causes of performance decay in traditional carbons is crucial to design a high-performance material. Based on this, here, nitrogen-doped activated carbon(NAC) was prepared by pyrolyzing the blend of activated carbon powder(ACP) and melamine for the positive electrode of asymmetric CDI. By comparing the indicators changes such as conductivity, salt adsorption capacity, pH, and charge efficiency of the symmetrical ACP-ACP device to the asymmetric ACP-NAC device under different CDI cycles, as well as the changes of the electrochemical properties of anode and cathode materials after long-term operation, the reasons for the decline of the stability of the CDI performance were revealed. It was found that the carboxyl functional groups generated by the electro-oxidation of anode carbon materials make the anode zero-charge potential(E_(pzc)) shift positively,which results in the uneven distribution of potential windows of CDI units and affects the adsorption capacity. Furthermore, by understanding the electron density on C atoms surrounding the N atoms, we attribute the increased cyclic stability to the enhanced negativity of the charge of carbon atoms adjacent to quaternary-N and pyridinic-oxide-N.

关键词： Anodic oxidation Capacitive deionization Cyclic stability N-doping

Textured Perovskite/Silicon Tandem Solar Cells Achieving Over 30% Efficiency Promoted by 4-Fluorobenzylamine Hydroiodide

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第9期16卷 557-570页

作者： Jingjing Liu Biao Shi Qiaojing xu Yucheng Li Yuxiang Li Pengfei Liu Zetong SunLi xuejiao Wang Cong Sun Wei Han Diannan Li Sanlong Wang Dekun Zhang Guangwu Li xiaona Du Ying Zhao Xiaodan Zhang Renewable Energy Conversion and Storage Center Solar Energy Conversion CenterInstitute of Photoelectronic Thin Film Devices and TechnologyNankai UniversityTianjin 300350People’s Republic of China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin 300350People’s Republic of China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192People’s Republic of China Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Tianjin 300350People’s Republic of China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072People’s Republic of China Center of Single‑Molecule Sciences Institute of Modern OpticsTianjin Key Laboratory of Micro‑Scale Optical Information Science and TechnologyCollege of Electronic Information and Optical EngineeringNankai University38 Tongyan RoadJinnan DistrictTianjin 300350People’s Republic of China Shenzhen Research Institute of Nankai University 16Th FloorYantian Science and Technology BuildingHaishan StreetYantian DistrictShenzhen 518083People’s Republic of China

Monolithic textured perovskite/silicon tandem solar cells(TSCs)are expected to achieve maximum light capture at the lowest cost,potentially exhibiting the best power conversion efficiency.However,it is challenging to fabricate high-quality perovskite films and preferred crystal orientation on commercially textured silicon substrates with micrometersize pyramids.Here,we introduced a bulky organic molecule(4-fluorobenzylamine hydroiodide(F-PMAI))as a perovskite additive.It is found that F-PMAI can retard the crystallization process of perovskite film through hydrogen bond interaction between F^(−)and FA^(+)and reduce(111)facet surface energy due to enhanced adsorption energy of F-PMAI on the(111)facet.Besides,the bulky molecular is extruded to the bottom and top of perovskite film after crystal growth,which can passivate interface defects through strong interaction between F-PMA+and undercoordinated Pb^(2+)/I^(−).As a result,the additive facilitates the formation of large perovskite grains and(111)preferred orientation with a reduced trap-state density,thereby promoting charge carrier transportation,and enhancing device performance and stability.The perovskite/silicon TSCs achieved a champion efficiency of 30.05%based on a silicon thin film tunneling junction.In addition,the devices exhibit excellent longterm thermal and light stability without encapsulation.This work provides an effective strategy for achieving efficient and stable TSCs.

关键词： Perovskite crystallization (111)preferred orientation Defect passivation Perovskite/silicon tandem solar cells

Pharmacokinetic study of salvianolic acid D after oral and intravenous administration in rats

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2015年第3期5卷 246-253页

作者： Junke Song Wen Zhang Jialin Sun xiaona xu xue Zhang Li Zhang Zhangying Feng Guan-hua Du State Key Laboratory of Bioactive Substances and Functions of Natural Medicines Beijing Key Laboratory of Drug Target Identification and Drug ScreeningInstitute of Materia MedicaChinese Academy of Medical Sciences & Peking Union Medical College Pharmacy Department of the Affiliated Hospital of Medical College of Qingdao University The Fourth Hospital of Hebei Medical University

A sensitive,specific and rapid LC-MS method was developed and validated for the determination of salvianolic acid D(Sal D) in rat plasma.This method used a single quadrupole mass spectrometer with an electrospray ionization(ESI) source.A single ion monitoring scanning(SIM) mode was employed.It showed good linearity over the concentration range from 3.3 to 666.7 ng/m L for the determination of Sal D.The R.S.D.% of intra-day and inter-day precision values were no more than7.69%,and the accuracy was within 91% 104% at all quality control levels.This LC-MS method was applied to the pharmacokinetic study of Sal D in rats.A two-compartmental model analysis was employed.The plasma concentrations at 2 min(C2min) were 5756.067719.61,11,073.0171783.46 and21,077.5875581.97 μg/L for 0.25,0.5 and 1 mg/kg intravenous injection,respectively.The peak plasma concentration(Cmax) was 333.08761.21 μg/L for 4 mg/kg oral administration.The area under curve(AUC0 t) was 14,384.37978443.184,22,813.369711,860.823,46,406.122727,592.645 and8201.74074711.961 μg/L h for intravenous injection(0.25,0.5 and 1 mg/kg) and oral administration(4 mg/kg),respectively.The bioavailability of Sal D was calculated to be 4.159%70.517%.

关键词： Salvianolic acid D LC-MS Pharmacokinetics Bioavailability Dose proportionality Salvia miltiorrhiza Danshen Analysis method

考虑整流性负载特性的LCC-S型无线电能传输系统优化设计

在线全文

学校读者我要写书评

暂无评论

电力自动化设备 2024年第4期44卷 211-217页

作者：李笑娜吴学智续文政祁静静荆龙北京交通大学国家能源主动配电网技术研发中心北京100044

无线电能传输系统中的整流性负载具有非线性特征,而对系统传输特性分析和谐振参数设计时常采用基波分析法,将整流性负载等效为纯电阻,导致理论分析与实际存在一定偏差、系统偏离谐振状态。针对该问题,以LCC-S型无线电能传输系统为研究对... 详细信息

无线电能传输系统中的整流性负载具有非线性特征,而对系统传输特性分析和谐振参数设计时常采用基波分析法,将整流性负载等效为纯电阻,导致理论分析与实际存在一定偏差、系统偏离谐振状态。针对该问题,以LCC-S型无线电能传输系统为研究对象,考虑谐波以及整流性负载的非线性,对系统传输特性进行分析,进而提出基于整流性负载补偿的负载阻抗和接收端串联谐振电容参数的计算方法,并对逆变电路开关特性进行分析验证。所提接收端谐振参数设计方法能够使系统接收端回路谐振,提高系统的输出功率;降低逆变电路开关管的关断电流,提升系统的传输效率。搭建了一套2.5 kW的LCC-S型无线电能传输实验平台,验证了理论分析与所提参数设计方法的有效性和正确性。

关键词：无线电能传输 LCC-S 基波分析法整流性负载谐振参数设计

在线全文

学校读者我要写书评

暂无评论

免疫检查点抑制剂相关结肠炎的研究进展

实用医学杂志 2024年第9期40卷 1314-1319页

作者：孟肖娜孙旭刘怀民郑州大学附属肿瘤医院(河南省肿瘤医院)中西医结合科郑州450008

免疫检查点抑制剂(immune checkpoint inhibitors,ICIs)包括细胞毒性T淋巴细胞相关蛋白4(cytotoxic T-lymphocyte-associated protein4,CTLA-4)抑制剂和程序性死亡受体1(programmed cell death receptor 1,PD-1)抑制剂及其配体1(programmed death-ligand 1,PD-L1)抑制剂改变了很多恶性肿瘤患者的临床结局,成为目前最重要的抗肿瘤手段。随着免疫治疗的广泛应用,ICIs诱导的免疫相关不良事件(immune-related adverse events,irAEs)逐渐引起临床重视,其中ICI相关结肠炎已成为胃肠道系统最常见的不良事件。本文通过对ICI相关结肠炎的流行病学、发病机制及临床诊治等领域进展进行阐述,旨在为临床医师及时鉴别和诊疗ICI相关结肠炎提供参考。

关键词：免疫检查点抑制剂免疫相关不良事件结肠炎

Emerging markers for antimicrobial resistance monitoring

在线全文

学校读者我要写书评

暂无评论

中国化学快报:英文版 2023年第10期34卷 55-66页

作者： Zineng Yi xiaona xu Xiaohan Meng Congyu Liu Qianpeng Zhou Deyan Gong Zhengbao Zha School of Food and Biological Engineering Hefei University of TechnologyHefei 230009China

The appearance and spread of antibiotic-resistant pathogens known as antimicrobial resistance(AMR)is one of the major worldwide health crises that humanity have to deal with over the next decades.One of the main methods for addressing AMR is the effective screening for antimicrobial insensitivity in clinical and environmental monitoring.Current clinical laboratory procedures use traditional culturebased antibiotic susceptibility testing(AST)methods,which can take up to 24 h to identify which drug is suitable for the infection inhibition.Therefore,it is vital to develop novel strategies that offer quick,simple,affordable,reliable,sensitive and accurate AMR monitoring.Sensors for AMR markers detection could possess the essential qualities for quickly identifying resistant microorganisms and could give vital data for the selection of antibacterial drugs administration.This review offers a summary of the innovative application of these AMR markers detection strategies focusing on healthcare and environmental surveillance for the AMR genotypic or phenotypic assessment.

关键词： Antimicrobial resistance markers Genotypic determination Enzymes detection Antibody labeling Protein labeling

在线全文

学校读者我要写书评

暂无评论

探析速度滑冰青年组专项体能训练的方法

冰雪体育创新研究 2024年第2期 10-12页

作者：许小娜沈阳体育学院辽宁沈阳110102

速度滑冰是一项对体能要求较高的运动项目,要求运动员具备较高的耐力、力量、速度和灵敏度等身体素质。青年组运动员正处于身体素质发展的关键时期,通过专项体能训练,可以提高运动员的体能水平。因此应重视速度滑冰青年组的专项体能训练... 详细信息

速度滑冰是一项对体能要求较高的运动项目,要求运动员具备较高的耐力、力量、速度和灵敏度等身体素质。青年组运动员正处于身体素质发展的关键时期,通过专项体能训练,可以提高运动员的体能水平。因此应重视速度滑冰青年组的专项体能训练,通过力量素质、速度素质、耐力素质、平衡素质、灵敏素质以及柔韧素质等专项训练方法,提高运动员的技术水平,为取得优异成绩打下坚实的基础。

关键词：速度滑冰青年组专项体能训练训练方法

大黄素对脂多糖诱导的新生大鼠急性肺损伤的保护作用

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

中国组织化学与细胞化学杂志 2024年第1期33卷 13-18,24页

作者：黄小娜许志有林坚海南省海口市第三人民医院儿内科海口571199

目的探索大黄素对脂多糖(lipopolysaccharide, LPS)诱导的新生大鼠急性肺损伤的保护作用。方法新生大鼠腹腔注射LPS制作建立急性肺损伤模型,每天腹腔注射不同剂量大黄素(emodin, EMD),连续治疗7 d,对照组腹腔注射等体积生理盐水。通... 详细信息

目的探索大黄素对脂多糖(lipopolysaccharide, LPS)诱导的新生大鼠急性肺损伤的保护作用。方法新生大鼠腹腔注射LPS制作建立急性肺损伤模型,每天腹腔注射不同剂量大黄素(emodin, EMD),连续治疗7 d,对照组腹腔注射等体积生理盐水。通过HE、Masson染色进行组织病理学检测,免疫组织化学检测肺组织平滑肌肌动蛋白(α-SMA)表达水平,原位末端标记法(TUNEL)检测肺组织细胞凋亡水平,Western Blot检测肺组织Ⅰ型胶原蛋白(Collagen Ⅰ)、Ⅲ型胶原蛋白(Collagen Ⅲ)、裂解的天冬氨酸特异性半胱氨酸蛋白酶3(cleaved Caspase 3)、白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)蛋白表达水平。结果脂多糖使大鼠肺损伤评分、肺纤维化程度、α-SMA平均光密度、TUNEL阳性率、Collagen I、Collagen Ⅲ、cleaved Caspase3、IL-1β、TNF-α蛋白表达水平较对照组显著增加,大黄素处理能剂量依赖性抑制脂多糖引起的上述变化。结论大黄素对LPS诱导的新生大鼠急性肺损伤具有保护作用。

关键词：脂多糖大黄素新生大鼠急性肺损伤

Analysis of the relationship between bile duct and duodenal microbiota reveals that potential dysbacteriosis is the main cause of primary common bile duct stones

在线全文

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2021年第4期6卷 414-428页

作者： Zhitang Lyu Tingting Yu Lichao Zhang xiaona xu Yijun Zhang Jihong Li Zhirong Li Wei Zhang Senlin Hou School of Life Sciences Institute of Life Science and Green DevelopmentHebei UniversityBaodingPR China The Second Hospital of Hebei Medical University ShijiazhuangPR China Key Laboratory of Microbial Diversity Research and Application of Hebei Province BaodingPR China Engineering Laboratory of Microbial Breeding and Preservation of Hebei Province BaodingPR China

Bacteria play an important role in the formation of primary Common Bile Duct(CBD)stones.However,the composition and function of the microbiota of bile duct in patients with primary CBD stones remained to be explored.We utilized the 16S rRNA gene high-throughput sequencing technology to analyze the microbial diversity and community composition of biliary and duodenal microbiota in 15 patients with primary CBD stones and 4 patients without biliary tract diseases.Alpha diversity analysis showed that the microbiota richness was similar in bile and intestinal fluid;Beta diversity analysis showed that there were differences in the composition between biliary microbiota and the duodenal microbiota,but the abundance of the main groups showed similarities.The composition of the biliary microbiota from gallstone patients was more complex,as was the duodenal microbiota.Proteobacteria and Firmicutes were the dominant bacteria at phylum level,accounting for at least 75%of the total reads in each subgroup.Pseudomonas and Escherichia􀀀Shigella were the major genus among subgroups,but Escherichia-Shigella had increased abundance in duodenal microbiota with primary choledocholithiasis,which may play an important role in stone formation.It is noteworthy that Clostridiumsensu_stricto,Lachnospiraceae_UCG-008,Butyrivibrio and Roseburia which could produce short chain fatty acids(SCFAs),were significantly decreased in biliary microbiota with primary CBD stones(p<0.05).Our study provided new insights into the compositional of normal biliary microbiota.The micro-ecology of biliary and duodenal in patients with stones is complex and closely related,and there is a potential for dysbacteriosis.The decrease in abundance of certain major acid-producing bacteria affects the health of the biliary tract and thus leads to the formation of stones.

关键词： Primary common bile duct stones ERCP Dysbacteriosis Bile duct microbiota Duodenal microbiota 16S rRNA gene high-throughput sequencing Short chain fatty acids