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Understanding the catalysis of chromium trioxide added magnesium hydride for hydrogen storage and Li ion battery applications

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Journal of magnesium and Alloys 2024年第3期12卷 1117-1130页

作者： D.Pukazhselvan IhsanÇaha Catarina de Lemos Sergey m.mikhalev Francis leonard Deepak Duncan Paul Fagg Department of mechanical Engineering TEMA-Centre for Mechanical Technology and AutomationUniversity of AveiroAveiro 3810-193Portugal LASI-Intelligent Systems Associate Laboratory Guimarães 4800-058Portugal Nanostructured materials Group International Iberian Nanotechnology Laboratory(INL)Avenida Mestre Jose VeigaBraga 4715-330Portugal

This study explores how the chemical interaction between magnesium hydride(mgH_(2))and the additive CrO_(3) influences the hydrogen/lithium storage characteristics of mgH_(2).We have observed that a 5 wt.%CrO_(3) additive reduces the dehydrogenation activation energy of mgH_(2) by 68 kJ/mol and lowers the required dehydrogenation temperature by 80℃.CrO_(3) added mgH_(2) was also tested as an anode in an Li ion battery,and it is possible to deliver over 90%of the total theoretical capacity(2038 mAh/g).Evidence for improved reversibility in the battery reaction is found only after the incorporation of additives with mgH_(2).In depth characterization study by X-ray diffraction(XRD)technique provides convincing evidence that the CrO_(3) additive interacts with mgH_(2) and produces Cr/mgO *** free energy analyses confirm the thermodynamic feasibility of conversion from mgH_(2)/CrO_(3) to mgO/Cr,which is well supported by the identification of Cr(0)in the powder by X ray photoelectron spectroscopy(XPS)*** high resolution transmission electron microscopy(HRTEm)and energy dispersive spectroscopy(EDS)we found evidence for the presence of 5 nm size Cr nanocrystals on the surface of mgO rock salt *** is also convincing ground to consider that mgO rock salt accommodates Cr in the *** observations support the argument that creation of active metal–metal dissolved rock salt oxide interface may be vital for improving the reactivity of mgH_(2),both for the improved storage of hydrogen and lithium.

关键词： Hydrogen storage Rechargeable batteries Binary hydrides metal oxides Catalytic mechanism.

Acceptability of Kangaroo mother Care (KmC) by mothers with Low-Birth-Weight Babies at Arthur Davison Children’s Hospital, in Ndola, Zambia

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Open Journal of Obstetrics and Gynecology 2024年第5期14卷 790-823页

作者： Julia D. Kalito maureen m. masumo Chapima Fabian Department of midwifery Women&#8217s and Child Health University of Zambia Lusaka Zambia

Background: Kangaroo mother Care is a simple safe method used to care for low-birth-weight babies. Low-birth-weight is a global public health issue that pose significant challenge to perinatal care systems. Globally, complications due to low-birth-weight are the leading cause of neonatal mortality, resulting in an estimated 1 million deaths annually. Kangaroo mother Care (KmC) is a low-cost method of care for low-birth-weight infants in areas with inadequate incubators and power outages with positive outcomes. Objectives: To assess factors influencing acceptability of Kangaroo mother Care (KmC) in NICU at Arthur Davison Children’s Hospital in Ndola, Zambia. methodology: A cross sectional quantitative analytical study design was used. The study was conducted at Arthur Davison Children’s Hospital (ADCH) in Ndola, Zambia. The purposive sampling method was used to select the study participants and a total of 129 mothers with Low Weight Babies A were selected to participate structured closed ended questionnaire was used to collect data from the participants using an interview. Data was analyzed using a Statistical Package for Social Scientists (SPSS) software version 26. Cross tabulations were done to determine association of variables using a Chi square (x2) test at 95% confidence interval and were assumptions where not met, fishers exact test was used. multivariate binary logistic regression analysis was used to quantify the relationship between the dependent and independent variables. Results: most of the respondents had male babies 77%, 69% of the babies weighed 1000 g - 1400 g, majority 79% had normal delivery, 71% of the respondents were multigravida and most of the respondents 79% were married. The study reviewed that 85% of those who attained secondary education accepted KmC, 74% of the respondents without monthly income accepted KmC, 80% of the respondents had positive attitude and accepted KmC. 82% of the respondents who had positive perception accep

关键词： Acceptability Kangaroo mother Care Low Birth Weight Babies

狐狸界的“妲己” 赤狐近亲相残究竟为什么？

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环球人文地理 2024年第5期 74-81页

作者：鲨鲨张扬的小强滕洪亮 m.leonard Photo marcel Rudolph-Gajda Kcapaldo mihiro＿wildlife Zyabich vladk213

因美丽而招致杀身之祸，为生存而近亲相残。狐狸界的妲己——赤狐，到底是祥瑞，还是祸水？从古至今，民间流传的神话传说、志怪传记都少不了狐狸们的身影。早在远古时期，华夏领袖大禹的妻子涂山九尾狐还是正面形象，可随后一个全然相...

因美丽而招致杀身之祸，为生存而近亲相残。狐狸界的妲己——赤狐，到底是祥瑞，还是祸水？从古至今，民间流传的神话传说、志怪传记都少不了狐狸们的身影。早在远古时期，华夏领袖大禹的妻子涂山九尾狐还是正面形象，可随后一个全然相反的狐狸形象诞生——妲己，她的知名度远远超过涂山氏，并在一定程度上定义了狐狸的妖媚概念。

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Demonstrating grating-based phase-contrast imaging of laser-driven shock waves

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matter and Radiation at Extremes 2024年第4期9卷 90-97页

作者： leonard Wegert Stephan Schreiner Constantin Rauch Bruno Albertazzi Paulina Bleuel Eric Frojdh michel Koenig Veronika Ludwig Artem Smartynenko Pascal meyer Aldo mozzanica michael müller Paul Neumayer markus Schneider Angelos Triantafyllidis Bernhard Zielbauer Gisela Anton Thilo michel Stefan Funk Plasma Physics Department GSI Helmholtzzentrum fur SchwerionenforschungPlanckstraBe 164291 DarmstadtGermany Erlangen Centre for Astroparticle Physics(ECAP) Friedrich-Alexander-Universität Erlangen-NurnbergNikolaus-Fiebiger-StraBe 291058 ErlangenGermany LULI-CNRS CEASorbonne UniversitésEcole PolytechniqueInstitut Polytechnique de ParisF-91120 Palaiseau CedexFrance Paul Scherrer Institut(Psi) Forschungsstrasse 1115232VilligenSwitzerland Karlsruhe Institute of Technology Institute of Microstructure TechnologyHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany

Single-shot X-ray phase-contrast imaging is used to take high-resolution images of laser-driven strong shock *** a two-grating Talbot interferometer,we successfully acquire standard absorption,differential phase-contrast,and dark-field images of the shocked *** agreement is demonstrated between experimental data and the results of two-dimensional radiation hydrodynamics simulations of the laser-plasma *** main sources of image noise are identified through a thorough assessment of the interferometer’s *** acquired images demonstrate that grating-based phase-contrast imaging is a powerful diagnostic tool for high-energy-density *** addition,we make a novel attempt at using the dark-field image as a signal modality of Talbot interferometry to identify the microstructure of a foam target.

关键词： interaction. shock phase

住院患者认知障碍识别和信息管理的整合性综述

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International Journal of Nursing Sciences 2024年第1期11卷 120-132页

作者：熊蓓蓓 Daniel X.Bailey Paul Prudon Elaine m.Pascoe leonard C.Gray Frederick Graham Amanda Henderson melinda martin-Khan Centre for Health Services Research Faculty of MedicineThe University of QueenslandBrisbaneAustralia Centre for Clinical Research Faculty of MedicineThe University of QueenslandRoyal Brisbane&Women’s HospitalBrisbaneAustralia Dementia and Delirium Division of MedicinePrincess Alexandra HospitalBrisbaneAustralia School of Nursing Faculty of HealthQueensland University of TechnologyBrisbaneAustralia Nursing Practice Development Unit Princess Alexandra HospitalBrisbaneAustralia School of Nursing Midwifery and Social SciencesCentral Queensland UniversityBrisbaneAustralia Griffith Health Griffith UniversityBrisbaneAustralia School of Nursing Midwifery and ParamedicineThe University of the Sunshine CoastBrisbaneAustralia Department of Health and Life Sciences University of ExeterExeterUnited Kingdom School of Nursing University of Northern British ColumbiaPrince GeorgeCanada

目的旨在对目前提供急性照护的医院识别认知障碍患者以及在病历中记录和管理认知相关信息的实际情况及政策要求和推荐方法进行综述。方法采用Whittemore和Knaf1的五步法,系统检索medline,CINAHL和Scopus数据库,并检索了灰色文献来源。... 详细信息

目的旨在对目前提供急性照护的医院识别认知障碍患者以及在病历中记录和管理认知相关信息的实际情况及政策要求和推荐方法进行综述。方法采用Whittemore和Knaf1的五步法,系统检索medline,CINAHL和Scopus数据库,并检索了灰色文献来源。纳人了提供急性照护的医院已实施的患者认知障碍识别和认知信息管理相关的文献。采用混合方法评价工具和灰色文献质量评估清单对文章质量进行评价。采用主题分析法呈现和整合结果。该综述已在PROSPERO预注册(CRD42022343577)。结果共22篇原始研究文献和10篇政府/行业文件被纳人分析。结果显示,实践和政策之间存在差距。尽管在政策层面上高度重视认知障碍的识别、认知相关信息的透明度,以及与患者、家属和照顾者(如适用)之间的互动,但有时在临床实践中,认知评估是非正式的,患者的认知相关信息未作记录,与患者、家属和照顾者的互动也存在不足。结论.通过整合认知评估,利用信息技术开发信息管理综合系统,建立相关法律法规,提供教育与和培训,并采用国家层面的策略,有可能显著改善对认知障碍患者的识别和护理。

关键词：急性照护认知功能障碍数据透明度谵妄痴呆健康信息管理与患者互动.

Targeted genotyping for the prediction of celiac disease autoimmunity development in patients with type 1 diabetes and their family members

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World Journal of Diabetes 2019年第3期10卷 189-199页

作者： maureen m.leonard Stephanie Camhi Victoria Kenyon Rebecca A Betensky Craig Sturgeon Shu Yan Alessio Fasano mucosal Immunology and Biology Research Center Mass General Hospital for Children Boston MA 02115 United States Center for Celiac Research and Treatment Mass General Hospital for Children Boston MA 02115 United States Department of Pediatric Gastroenterology and Nutrition Mass General Hospital for Children Boston MA 02114 United States Department of Biostatistics Harvard T.H. Chan School of Public Health Boston MA 02115 United States

BACKGROUND Patients with type 1 diabetes (T1D) and their first-degree relatives (FDRs) have an increased risk of developing celiac disease (CD) compared to the general population. This is largely explained by the shared association with major histocompatibility class II human leukocyte antigen (HLA) DQ2 and/or DQ8 between the two disease states. AIm To describe the frequency of CD autoimmunity (CDA) and the distribution of HLA and haptoglobin genotypes in patients with T1D and their FDRs. Additionally, we aimed at identifying predictors associated with an increased risk of developing CDA in patients with T1D and their family members. mETHODS We obtained clinical information and blood samples from 1027 participants (302 with T1D and 725 FDRs) over a five-year period. Samples were tested for autoantibodies associated with CD, HLA-DQ alleles, and haptoglobin *** fit univariate and multiple logistic regression models for CDA separately for subjects with T1D and for FDRs of subjects with T1D. RESULTS Implementation of a screening program increased the frequency of CDA by 2- fold in participants with T1D and 2.8-fold in their FDRs. multivariate analysis found that, in participants with T1D, having both DR7-DQ2 and DR4-DQ8 was associated with an increased frequency of CDA. In FDRs of T1D patients, reported CD in the family was associated with an increased frequency of CDA during screening. Haptoglobin 2 genotype was not associated with developing CDA in the multivariate analysis. CONCLUSION Patients with T1D and their FDRs have a high frequency of CDA. Carrying both DR7-DQ2 and DR4-DQ8 was associated with development of CDA in patients with T1D.

关键词： Screening Gluten Diabetic Coeliac Haptoglobin Human leukocyte antigen

User-centered development and performance assessment of a modular full-body exoskeleton (AXO-SUIT)

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Biomimetic Intelligence & Robotics 2022年第2期2卷 9-16页

作者： Shaoping Bai m.R.Islam Valerie Power leonard OŚullivan Department of materials and Production Aalborg UniversityAalborg 9220Denmark School of Design Health Research Institute and CONFIRM Smart Manufacturing CentreUniversity of LimerickIreland

This paper presents the design and preliminary performance assessment of a full-body assistive exoskeleton(AXO-SUIT)for older ***-SUIT is a system that consists of separate lower-body and upper-body modular exoskeletons,which can be combined to form a full-body system to provide flexible physical assistance as *** full-body exoskeleton comprises 27 degrees of freedom(dof),of which 17 are passive and 10 *** can assist people in walking,standing,carrying and handling tasks.A user-centered design approach was adopted throughout the development of the *** paper describes the design process of AXOSUIT,involving a review of user needs,a kinematic and kinetic motion study,and innovative system *** with the developed systems were conducted on selected end-user subjects,covering both performance evaluations at different levels and useability ***-user testing results show the effectiveness of the exoskeleton in providing flexible physical assistance.

关键词： Exoskeletons Physical assistance for the elderly User-centered design Performance assessment

Study of galvanic corrosion and mechanical joint properties of AZ31B and carbon-fiber–reinforced polymer joined by friction self-piercing riveting

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Journal of magnesium and Alloys 2022年第2期10卷 434-445页

作者： Yong Chae Lim Jiheon Jun Donovan N.leonard Yuan Li Jian Chen michael P.Brady Zhili Feng materials Science and Technology Division Oak Ridge National LaboratoryOne Bethel Valley RoadOak RidgeTN 37831USA

A new testing methodology was developed to quantitively study galvanic corrosion of AZ31B and thermoset carbon-fiber–reinforced polymer spot-joined by a friction self-piercing riveting ***-defined areas of AZ31B in the joint were exposed in 0.1 m NaCl solution over *** galvanic corrosion of AZ31B was observed as exposure time *** measured volume loss was converted into corrosion current that was at least 48 times greater than the corrosion current of AZ31B without galvanic *** percent of the mechanical joint integrity was retained for corroded F-SPR joints to 200 h and then decreased because of the massive volume loss of AZ31B。

关键词： multi-material joining Carbon fiber–reinforced polymer AZ31B Friction self-piercing riveting Galvanic corrosion mechanical joint strength

Boosting acidic water oxidation performance by constructing arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) with abundant atomic steps

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Nano Research 2022年第7期15卷 5933-5939页

作者： Junjie Li Zan Lian Qiang Li Zhongchang Wang Lifeng Liu Francis leonard Deepak Yanping Liu Bo Li Junyuan Xu Zuxin Chen CAS Key Laboratory of Functional materials and Devices for Special Environments Xinjiang Technical Institute of Physics&ChemistryChinese Academy of SciencesUrumqi 830011China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China International Iberian Nanotechnology Laboratory(INL) Braga 4715-330Portugal Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South UniversityChangsha 410083China Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Institute of Semiconductors South China Normal UniversityGuangzhou 510631China

The fabrication of electrocatalysts with high activity and acid stability for acidic oxygen evolution reaction(OER)is an urgent need,yet extremely ***,we report the design and successful fabrication of a high performance self-supported cogwheel arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) catalyst with abundant atomic steps for acidic OER using a facile alloy-spinningelectrochemical activation method that allows large-scale *** obtained Ir_(x)Ru_(1−x)O_(2) catalysts merely need overpotentials of 211 and 295 mV to deliver catalytic current densities of 10 and 300 mA·cm^(−2) in 0.5 m H_(2)SO_(4),respectively,and can sustain constant OER electrolysis for at least 140 h at a high current density of 300 mA·cm^(−2).Further density functional theory(DFT)calculations uncover that such high intrinsic activities mainly originate from the largely exposed high-index atomic step planes,which markedly lower the limiting potential of the rate-determining step(RDS)of *** findings provide an insight into the exploration of high performance electrocatalysts,and open up an avenue for further developing the state-of-theart Ir and/or Ru-based catalysts for large-scale practical applications.

关键词： oxygen evolution reaction(OER)electrolysis nanoporous structure Ir_(x)Ru_(1−x)O_(2) defects atomic steps