检索结果-南通市图书馆

Templated synthesis of transition metal phosphide electrocatalysts for oxygen and hydrogen evolution reactions

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第2期89卷 646-669,I0014页

作者： Rose Anne Acedera Alicia Theresse dumlao dJ donn Matienzo Maricor divinagracia Julie Anne del Rosario Paraggua Po-Ya Abel Chuang joey ocon Laboratory of Electrochemical Engineering(LEE) Department of Chemical EngineeringUniversity of the PhilippinesDilimanQuezon City 1101Philippines Mechanical Engineering University of CaliforniaMercedCA 95343USA Energy Engineering Program College of EngineeringUniversity of the PhilippinesDilimanQuezon City 1101Philippines

Transition metal phosphides(TMPs)have been regarded as alternative hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalysts owing to their comparable activity to those of noble metal-based *** have been produced in various morphologies,including hollow and porous nanostructures,which are features deemed desirable for electrocatalytic *** synthesis routes are often responsible for such *** paper reviews the latest advances and existing challenges in the synthesis of TMP-based OER and HER catalysts through templated methods.A comprehensive review of the structure-property-performance of TMP-based HER and OER catalysts prepared using different templates is *** discussion proceeds according to application,first by HER and further divided among the types of templates used-from hard templates,sacrificial templates,and soft templates to the emerging dynamic hydrogen bubble *** catalysts are then reviewed and grouped according to their ***,prospective research directions for the synthesis of hollow and porous TMP-based catalysts,such as improvements on both activity and stability of TMPs,design of environmentally benign templates and processes,and analysis of the reaction mechanism through advanced material characterization techniques and theoretical calculations,are suggested.

关键词： OER HER Transition metal phosphide Templated synthesis Electrocatalysts

Association of accelerometer-measured sleep duration and different intensities of physical activity with incident type 2 diabetes in a population-based cohort study

在线全文

学校读者我要写书评

暂无评论

Journal of Sport and Health Science 2024年第2期13卷 222-232页

作者： Xinyi Jin Yilin Chen Hongliang Feng Mingqing Zhou joey W.Y.Chang Yaping Liu Alice Pik Shan Kong Xiao Tan Yun-Kwok Wing Yannis Yan Liang Jihui Zhang Guangdong Cardiovascular Institute Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China Guangdong Provincial Key Laboratory of Coronary Heart disease Prevention Guangdong Cardiovascular InstituteGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510080China School of Medicine South China University of TechnologyGuangzhou 510641China Center for Sleep and Circadian Medicine The Affiliated Brain Hospital of Guangzhou Medical UniversityGuangzhou 510180China The Second School of Clinical Medicine Southern Medical UniversityGuangzhou 510282China Guangdong Mental Health Center Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510120China Li Chiu Kong Family Sleep Assessment Unit Department of PsychiatryFaculty of MedicineThe Chinese University of Hong KongHong Kong 999077China department of Psychiatry Faculty of MedicineThe Chinese University of Hong KongHong Kong 999077China department of Medicine and Therapeutics Faculty of MedicineThe Chinese University of Hong KongHong Kong 999077China department of Medical Sciences Uppsala UniversityUppsala 75185Sweden department of Big data in Health Science Zhejiang University School of Public HealthHangzhou 310058China Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China Guangzhou 510260China

Purpose:The aim of the current study was to investigate the association of accelerometer-measured sleep duration and different intensities of physical activity(PA)with the risk of incident type 2 diabetes in a population-based prospective cohort ***:Altogether,88,000 participants(mean age=62.2±7.9 years,mean±Sd)were included from the UK *** duration(short:day;normal:6-8 h/day;long:>8 h/day)and PA of different intensities were measured using a wrist-won accelerometer over a 7-day period between 2013 and *** was classified according to the median or World Health Organization-recommendation:total volume of PA(high,low),moderate-to-vigorous PA(MVPA)(recommended,not recommended),and light-intensity PA(high,low).Incidence of type 2diabetes was ascertained using hospital records or death ***:during a median follow-up of 7.0 years,1615 incident type 2 diabetes cases were *** with normal sleep duration,short(hazard ratio(HR)=1.21,95%confidence interval(95%CI):1.03-1.41)but not long sleep duration(HR=1.01,95%CI:0.89-1.15)was associated with excessive type 2 diabetes *** increased risk among short sleepers seems to be protected against by *** with normal sleepers with high or recommended PA,short sleepers with low volume of PA(HR=1.81,95%CI:1.46-2.25),not recommended(below the World Health Organization-recommended level of)MVPA(HR=1.92,95%CI:1.55-2.36),or low light-intensity PA(HR=1.49,95%CI:1.13-1.90)had a higher risk of type 2 diabetes,while short sleepers with a high volume of PA(HR=1.14,95%CI:0.88-1.49),recommended MVPA(HR=1.02,95%CI:0.71-1.48),or high light-intensity PA(HR=1.14,95%CI:0.92-1.41)did ***:Accelerometer-measured short but not long sleep duration was associated with a higher risk of incident type 2 diabetes.A higher level of PA,regardless of intensity,potentially ameliorates this excessive risk.

关键词： Light physical activity Sleep duration Triaxial accelerometer Type 2 diabetes UK Biobank

Enhanced reversible capacity of Li-S battery cathode based on graphene oxide

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2013年第2期22卷 336-340页

作者： Jin Won Kim joey d. ocon dong-Won Park Jaeyoung Lee School of Environmental Science and Engineering Laboratory for Energy Storage Systems Ertl Center for Electrochemistry and Catalysis RISE Gwangju Institute of Science and Technology

Lithium sulfur battery （LSB） offers several advantages such as very high energy density, low-cost, and environmental-friendliness. However, it suffers from serious degradation of its reversible capacity because of the dissolution of reaction intermediates, lithium polysulfides, into the electrolyte. To solve this limitation, there are many studies using graphene-based materials due to their excellent mechanical strength and high conductivity. Compared with graphene, graphene oxide （GO） contains various oxygen functional groups, which enhance the reaction with lithium polysulfides. Here, we investigated the positive effect of using GO mixed with carbon black on the performance of cathode in LSB. We have observed a smaller drop of capacity in GO mixed sulfur cathode. We further demonstrate that the mechanistic origin of reversibility improvement, as confirmed through CV and Raman spectra, can be explained by the stabilization of sulfur in lithium polysulfide intermediates by oxygen functional groups of GO to prevent dissolution. Our findings suggest that the use of graphene oxide-based cathode is a promising route to significantly improve the reversibility of current LSB.

关键词： lithiums sulfur battery graphene oxide capacity fading lithium polysulfide dissolution

Polyaniline Nanofiber Composites with Amines:Novel Materials for Phosgene detection

在线全文

学校读者我要写书评

暂无评论

Nano Research 2009年第2期2卷 135-142页

作者： Shabnam Virji Robert Kojima Jesse d.Fowler joey G.Villanueva Richard B.Kaner Bruce H.Weiller Materials Processing and Evaluation department Space Materials LaboratoryThe Aerospace CorporationP.O.Box 92957/M2-248Los AngelesCA 90009USA department of Chemistry&Biochemistry and California NanoSystems Institute University of CaliforniaLos AngelesLos AngelesCA 90095-1569USA

Several orders of magnitude of change in resistance are observed upon chemical doping and dedoping of the conducting polymer *** large conductivity range can be utilized to make sensitive chemical ***,in its nanofiber form,has even greater sensing capabilities due to the small fiber diameters,high surface area,and porous nanofiber network that enhances gas diffusion into the *** nanofibers have been synthesized using a rapid mixing method and dispersed in water allowing them to be easily modified with water soluble agents,making new composite *** nanofiber composite materials can be used to enhance detection of analytes that unmodified polyaniline would not otherwise be able to *** detection mechanism involves the reaction of an additive with the analyte to generate a strong acid that is easily detected by polyaniline,resulting in orders of magnitude changes in *** reaction of the additive alone with the analyte produces no electrical response,*** this paper,an array of amine-polyaniline nanofiber composite materials is investigated for the detection of phosgene *** influence of environmental conditions such as humidity and temperature are examined and a detection mechanism is presented.

关键词： Polyaniline nanofibers conducting polymer amines chemical sensor phosgene

Preliminary study on different nutrient pools supplies for the phytoplankton growth in the Jiaozhou Bay in China in the fall of 2004

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

Acta Oceanologica Sinica 2007年第3期26卷 110-120页

作者： WANG dan SUN Jun SONG Shuqun LUAN Qingshan joey McMurdie Key Laboratory of Marine Ecology ＆ Environmental Science Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China depatment of Civil ＆ Environmental Engineering Stanford University California 94305 USA

The source and significance of two nutrients, nitrogen and phosphorous, were investigated by a modified dilution method performed on seawater samples from the Jiaozhou Bay, in autumn 2004. This modified dilution method accounted for the phytoplankton growth rate, microzooplankton grazing mortality rate, the internal and external nutrient pools, as well as nutrient supplied through remineralization by microzooplankton. The results indicated that the phytoplankton net growth rate increased in turn from inside the bay, to outside the bay, to in the Xiaogang Harbor. The phytoplankton maximum growth rates and microzooplankton grazing mortality rates were 1.14 and 0.92 d^-1 outside the bay, 0.42 and 0.32 d^ -1 inside the bay and 0.98 and 0.62 d^-1 in the harbor respectively. Outside the bay, the remineralized nitrogen （Kt = 24.49） had heavy influence on the growth of the phytoplankton. Inside the bay, the remineralized phosphorus（Kt = 3.49） strongly affected the phytoplankton growth. In the harbor, the remineralized phosphorus （Kt = 3.73） was in larger demand by phytoplankton growth. The results demonstrated that the dif- ferent nutrients pools supplied for phytoplankton growth were greatly in accordance with the phytoplankton community structure, microzooplankton grazing mortality rates and environmental conditions. It is revealed that nutrient remineralization is much more important for the phytoplankton growth in the Jiaozhou Bay than previously believed.

关键词： phytoplankton external nutrient internal nutrient remineralized nutrient maximum growth rate microzooplankton grazing mortality rate Jiaozhou Bay

Phylogenetic inferences in Prunus （Rosaceae） using chloroplast ndhF and nuclear ribosomal ITS sequences

在线全文

学校读者我要写书评

暂无评论

植物分类学报 2008年第3期46卷 322-332页

作者： Jun WEN Scott T. BERGGREN Chung-Hee LEE Stefanie ICKERT-BONd Ting-Shuang YI Ki-Oug YOO Lei XIE joey SHAW dan POTTER department of Botany National Museum of Natural History MRC 166 Smithsonian Institution Washington DC 20013-7012 USA department of Biology Colorado State University Fort Collins CO 80523 USA Korean National Arboretum 51-7 Jikdongni Soheur-eup Pocheon-si Gyeonggi-do 487-821 Korea UA Museum of the North and department of Biology and Wildlife University of Alaska Fairbanks Fairbanks AK 99775-6960 USA Key Laboratory of Plant Biodiversity and Biogeography Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China division of Life Sciences Kangwon National University Chuncheon 200-701 Korea State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China department of Biological and Environmental Sciences University of Tennessee Chattanooga TN 37403-2598 USA department of Plant Sciences MS 2 University of California Davis CA 95616 USA

Sequences of the chloroplast ndhF gene and the nuclear ribosomal ITS regions are employed to recon-struct the phylogeny of Prunus (Rosaceae), and evaluate the classification schemes of this genus. The two data sets are congruent in that the genera Prunus s.l. and Maddenia form a monophyletic group, with Maddenia nested within Prunus. However, the ndhF data set is incongruent with the ITS data supporting two major groups within Prunus: one consisting of subgenera Laurocerasus (including Pygeum) and Padus as well as the genus Maddenia and another of subgenera Amygdalus, Cerasus, and Prunus. The ITS data, on the other hand, support a clade composed of subgenera Amygdalus and Prunus and Prunus sect. Microcerasus in addition to a paraphyletic grade of subgenera Laurocerasus and Padus (and the genus Maddenia) taxa. In general, the subgeneric classifications of Prunus s.l. are not supported. The ITS and ndhF phylogenies differ mainly in interspecific relationships and the relative position of the Padus/Laurocerasus group. Both ITS and ndhF data sets suggest that the formerly recog-nized genus Pygeum is polyphyletic and that the distinction of the subgenera Padus and Laurocerasus is not supported. The biogeographic interactions of the temperate and tropical members in the Padus/Laurocera- sus/Maddenia alliance including Pygeum are shown to be highly dynamic and complex.

关键词：系统发生学叶绿体核糖体层序核子

在线全文

学校读者我要写书评

暂无评论

带来希望和喜悦的真实人生

空中英语教室（高级版．彭蒙惠英语） 2020年第7期 24-25,44,45页

作者： joey Flechas 陈信宏(译) 不详

提摩西·尼雄在与妈妈还有两个姐妹同住的简朴公寓里,显得很有存在感。在不久之前的一天傍晚,他们公寓那个小巧的起居室里,充盈着这名14岁男孩的声音和欢乐情绪,他不停地述说着他学到的东西。他的姐妹们坐在一张小桌边,一边听他说话,一... 详细信息

提摩西·尼雄在与妈妈还有两个姐妹同住的简朴公寓里,显得很有存在感。在不久之前的一天傍晚,他们公寓那个小巧的起居室里,充盈着这名14岁男孩的声音和欢乐情绪,他不停地述说着他学到的东西。他的姐妹们坐在一张小桌边,一边听他说话,一边感受他发散出的欢乐气氛。

关键词：公寓提摩西起居室

剂量-反应Meta分析之灵活幂函数多项式在模型中的应用

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

中国循证医学杂志 2016年第2期16卷 219-222页

作者：徐畅邝心颖张超牛玉明湖北医药学院附属太和医院循证医学中心湖北十堰442000 武汉大学中南医院泌尿外科武汉430071 四川大学华西医院中国循证医学中心成都610041 湖北医药学院附属太和医院口腔科湖北十堰442000

作为Meta分析的一个分支,剂量-反应Meta分析在探讨潜在病因暴露水平对应疾病发生风险方面起着重要作用。传统的剂量-反应Meta分析模型仅解决了自变量与因变量之间潜在的线性关系,随着方法学及函数模型的发展,各种非线性回归方法被应用... 详细信息

作为Meta分析的一个分支,剂量-反应Meta分析在探讨潜在病因暴露水平对应疾病发生风险方面起着重要作用。传统的剂量-反应Meta分析模型仅解决了自变量与因变量之间潜在的线性关系,随着方法学及函数模型的发展,各种非线性回归方法被应用于剂量反应Meta分析中,如经典的限制性立方样条回归、二次B样条回归等均被研发。然而,上述方法因函数自变量(x)的元数及次数已经固定,对于不同类型的数据分布情况及趋势走向,并不一定均适用,同时可能出现过度拟合的风险。灵活分段多项式法则很好地解决了这个问题,其通过建立灵活的分段多项式函数,各个进行似然比检验,选出最佳的自变量元数及次数对剂量-反应趋势进行拟合,得出更符合个体化数据的结果,使其更接近于真实值。本文就运用灵活分段多项式模型进行剂量-反应Meta分析方法学进行相关简介。

关键词：剂量-反应Meta分析灵活分段多项式似然比检验

QUANTIFYING NANOP ARTICLE TRANSPORT IN VIVO USING HYP ERSPECTRAL IMA GING WITH A dORSAL SKINFOLd WINdOW CHAMBER

在线全文

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2012年第4期5卷 8-17页

作者： TREVOR d.MCKEE JUAN CHEN IAN CORBIN GANG ZHENG RAMA KHOKHA Ontario Cancer Institute University Health Network TorontoOntario STTARR Innovation Center University Health Network TorontoCanada department of Medical Biophysics University of Toronto TorontoCanada Advanced Imaging Research Center University of Texas Southwestern Medical Center at dallas dallas USA

We have developed a noninv asive imaging method to quantify in viwo drug delivery pharmaco-kinetics without the need for blood or tissue collection to determine drug *** combining the techniques of hy perspectral imaging and a dorsal skinfold window chamber,this method enabled the real-time monitoring of vascular transport and tissue deposition of nano-particles labeled with near infrared(NIR)*** this imaging method,we quantified the delivery pharmacokinetics of the native high-density lipoprotein(HdL)and epidermal growth factor receptor(EGFR)-targeted HdL nanoparticles and demonstrated these HdLs had long circulation time in blood stream(half-life>12h).These HdL nanoparticles could eficiently carry cargo diR-BOA to extravasate from blood vesels,difuse through extr acellular matrix,and penetrate and be retained in the tumor *** EGFR targeting specificity of EGFR-targeted HdL(EGFR-specific peptide conjugated HdL)was also visualized in vivo by competitive inhi bition with excess EGFR specifc *** summary,this imaging technology may help point the way toward the development of novel imaging based pharmacokinetic assays for preclinical drugs and evaluation of drug delivery eficiency,providing a dynamic window into the devel opment and application of novel drug delivery systems.

关键词： specificity kinetics competitive