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Prevalence and risks of soil transmitted helminths among Ethiopian school children:A cross-sectional study

Asian Pacific Journal of Tropical Medicine 2022年第3期15卷 121-127页

作者： Abebe Fenta Bewket Mesganaw Feven Belachew Getachew Teshale Gashaw Abebaw Elias Tesfa Getaye Alemayehu Department of Medical Laboratory Science Health Science CollegeDebre Markos UniversityDebre MarkosEthiopia

Objective:To assess the prevalence and associated factors of soil transmitted helminths(STHs)among Endemata primary school in North West Ethiopia,2021.Methods:A cross-sectional study with 195 school children was conducted from May to July 2021 at Endemata primary school.The study participants were selected by using systematic random sampling technique.Stool samples were processed via direct wet mount and formol-ether concentration techniques.Data was entered by Epi-Dara version 3.1 and data analysis was done using SPSS version 20.0.Variables were considered to be statistically significant if P<0.05 at 95%confidence level.Results:The overall prevalence of STHs was 10.8%(95%CI 7.1-16.0).The prevalence of Ascaris lumbricoides,hookworm and Trichuris trichiura were 5.6%(95%CI 3.1-9.9),3.1%(95%CI 1.3-6.7)and 2.1%(95%CI 0.6-5.3),respectively.Grade 1-4 students were more likely to get infected with STHs as compared to grade 5-8 students(adjusted OR 4.7,95%CI 1.3-16.6).Students who did not have latrines at their home were at higher risk to develop STHs infection comparing with those who had latrine at their home(adjusted OR 5.0,95%CI 1.7-15.2).Similarly,the school children who did not wear shoes were more likely to be infected by STH parasite than those who did it(adjusted OR 6.3,95%CI 1.9-20.7).The odds of being infected by STH parasites in children who did not trim their fingernails were 4.9 as compared to those who did it(adjusted OR 4.9,95%CI 1.5-15.7).Conclusions:The prevalence of STHs among Endemata primary school children was low.Student grade level,latrine availability,shoes wear and nail status were significantly associated with STHs infection.Therefore,we recommend policy makers and stakeholders to follow the integration of deworming with water,hygiene and sanitation as well as the consistent health education of school children to control and prevent STH infections.

关键词： Soil transmitted helminths Prevalence Associated factors School children Ethiopia

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Trimetallic nanostructures and their applications in electrocatalytic energy conversions

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Journal of Energy Chemistry 2022年第2期31卷 329-351页

作者： Shushay Hagos Gebre Marshet getaye Sendeku College of Natural and Computational Science Department of ChemistryJigjiga University1020 JigjigaEthiopia CAS Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyBeijing 100190China

The advancement and growth of nanotechnology lead to realizing new and novel multi-metallic nanostructures with well-defined sizes and morphology,resulting in an improvement in their performance in various catalytic applications.The trimetallic nanostructured materials are synthesized and designed in different architectures for energy conversion electrocatalysis.The as-synthesized trimetallic nanostructures have found unique physiochemical properties due to the synergistic combination of the three different metals in their structures.A vast array of approaches such as hydrothermal,solvothermal,seedgrowth,galvanic replacement reaction,biological,and other methods are employed to synthesize the trimetallic nanostructures.Noteworthy,the trimetallic nanostructures showed better performance and durability in the electrocatalytic fuel cells.In the present review,we provide a comprehensive overview of the recent strategies employed for synthesizing trimetallic nanostructures and their energy-related applications.With a particular focus on hydrogen evolution,alcohol oxidations,oxygen evolution,and others,we highlight the latest achievements in the field.

关键词： Trimetallic nanoparticle Electrooxidation Electrocatalysis Alloy Energy conversion

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钨掺杂镍铁水滑石高效电催化析氧反应(英文)

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物理化学学报 2023年

作者：段欣漩 Marshet getaye Sendeku 张道明周道金徐立军高学庆陈爱兵邝允孙晓明清华大学深圳研究院海洋氢能研发中心北京化工大学化工资源有效利用国家重点实验室北京软物质科学与工程高精尖创新中心中核战略研究规划总院新疆工程学院新疆煤矿机电工程技术研究中心河北科技大学化学与制药工程学院

电解水对制备可持续和清洁的氢气能源至关重要。电解水的阳极析氧反应设计复杂的4-电子转移过程，所需能耗较高，是电解水的速控步骤。催化剂对于析氧反应的进行具有重要作用。镍铁水滑石是最具潜力的碱性非贵金属析氧反应(OER)催化剂... 详细信息

电解水对制备可持续和清洁的氢气能源至关重要。电解水的阳极析氧反应设计复杂的4-电子转移过程，所需能耗较高，是电解水的速控步骤。催化剂对于析氧反应的进行具有重要作用。镍铁水滑石是最具潜力的碱性非贵金属析氧反应(OER)催化剂，但是由于水滑石导电性差、活性位点暴露不充分、对反应中间体吸附较弱等问题，催化活性还需要进一步提高。如何提升催化活性已经被科学家们广泛关注，比如：制造缺陷、掺杂、将水滑石剥离为单层结构和组装为阵列结构等。在本论文中，通过简单的“一锅法”醇解合成了一系列不同量W掺杂NiFe-LDH的样品。XRD结果表明合成的NiFeW-LDH的衍射峰与完美NiFe-LDH标准卡片相同，没有其他的衍射峰，表明W没有单独成相，被成功掺杂进入NiFe-LDH。扫描电镜表明NiFeW-LDH为纳米片(尺寸约为～500 nm)组成的3d立体花状结构，且材料中Ni、Fe和W均匀分布。XPS表明材料中W的价态为6+，与未掺杂的NiFe-LDH相比，Fe向高价态移动，表面吸附的OH增多。在密度泛函理论(DFT)计算中，结果同样表明W6+掺杂有利于H2O和O*中间体的吸附，提高了Fe位点的活性。在1 mol·L-1KOH中，NiFeW-LDH达到10 mA·cm-2所需过电位是199和237 mV，这比大多数的NiFe基粉末催化剂的性能好。综上，实验和计算表明W掺杂调控催化剂中Fe位点电子结构，优化对反应中间体的吸附，使催化剂具有更高活性。

关键词：析氧反应水滑石钨掺杂电子相互作用电催化

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基于范德华铁电异质结的具有亚5nm沟道亚热电子场效应晶体管

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Science Bulletin 2020年第17期65卷 1444-1450,M0003页

作者：王峰刘佳黄文浩程瑞清尹蕾王俊俊 Marshet getaye Sendeku 张玉詹雪莹单崇新王振兴何军 CAS Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyBeijing 100190China School of Physics and Technology Wuhan UniversityWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material Physics(Ministry of Education)School of PhysicsZhengzhou UniversityZhengzhou 450052China

本文展示了基于铁电范德华异质结的具有小于5 nm沟道宽度的二维亚热电子场效应晶体管.该器件分别由石墨烯作为电极,二硫化钼作为导电沟道, CuInP2S6作为铁电介电层.研究表明,所制造的长沟道器件在室温下具有3个数量级的开关比,几乎无回... 详细信息

本文展示了基于铁电范德华异质结的具有小于5 nm沟道宽度的二维亚热电子场效应晶体管.该器件分别由石墨烯作为电极,二硫化钼作为导电沟道, CuInP2S6作为铁电介电层.研究表明,所制造的长沟道器件在室温下具有3个数量级的开关比,几乎无回滞,并具有亚热电子的开关特性.此外,本文使用金属碳纳米管作为有效的栅极制备了超短沟道器件.该器件同样表现出亚热电子开关特性,室温下亚阈值摆幅最小可达6.1 mV/dec.

关键词：场效应晶体管开关特性热电子异质结亚阈值摆幅沟道宽度器件开关比

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单原子钌分散的TiO_(2)促进高效水氧化产过氧化氢

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Science Bulletin 2023年第6期68卷 613-621,M0004页

作者：王兆磊徐文海谭国英段欣璇袁碧晨 Marshet getaye Sendeku 刘海李天水王枫梅邝允孙晓明 State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing University of Chemical TechnologyBeijing 100029China Ocean Hydrogen Energy R&D Center Research Institute of Tsinghua UniversityShenzhen 518057China

电催化两电子水氧化为分布式合成H_(2)O_(2)提供了一个有效的途径.但是由于缺乏合适的阳极电催化剂,通过两电子水氧化合成H_(2)O_(2)难以兼得高选择性和高产率.本文将钌单原子可控地引入到TiO_(2)中,用于促进高效水氧化产H_(2)O_(2).研... 详细信息

电催化两电子水氧化为分布式合成H_(2)O_(2)提供了一个有效的途径.但是由于缺乏合适的阳极电催化剂,通过两电子水氧化合成H_(2)O_(2)难以兼得高选择性和高产率.本文将钌单原子可控地引入到TiO_(2)中,用于促进高效水氧化产H_(2)O_(2).研究发现,钌单原子的引入优化了材料对含氧中间体的吸附,在获得高电流密度的同时促进了H_(2)O_(2)产生.具体来说,通过对钌掺杂浓度的调控,所合成催化剂在120 mA cm^(-2)的电流密度下实现了62.8%的法拉第效率,并且H_(2)O_(2)产率高达24.2μmol min-1cm^(-2)(10 min内H_(2)O_(2)积累超过400 ppm).本文不仅证明了在高电流密度下高效率产H_(2)O_(2)的可能性,同时也验证了在电催化水氧化过程中调节中间体吸附的重要性.

关键词： Hydrogen peroxide synthesis Single atom Water oxidation Electrocatalysis

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Reconfigurable photovoltaic effect for optoelectronic artificial synapse based on ferroelectric p-n junction

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Nano Research 2021年第11期14卷 4328-4335页

作者： Yanrong Wang Feng Wang Zhenxing Wang Junjun Wang Jia Yang Yuyu Yao Ningning Li Marshet getaye Sendeku Xueying Zhan Congxin Shan Jun He CAS Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyBeijing100190China Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan430072China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Sino-Danish college University of Chinese Academy of SciencesBeijing100049China Sino-Danish Centre for Education and Research Beijing100049China School of Physics and Engineering Zhengzhou UniversityZhengzhou450001China

Neuromorphic machine vision has attracted extensive attention on wide fields.However,both current and emerging strategies still suffer from power/time inefficiency,and/or low compatibility,complex device structure.Here we demonstrate a driving-voltage-free optoelectronic synaptic device using non-volatile reconfigurable photovoltaic effect based on MoTe_(2)/α-In_(2)Se_(3) ferroelectric p-n junctions.This function comes from the non-volatile reconfigurable built-in potential in the p-n junction that is related to the ferroelectric polarization inα-In_(2)Se_(3).Reconfigurable rectification behavior and photovoltaic effect are demonstrated firstly.Notably,the figure-of-merits for photovoltaic effect like photoelectrical conversion efficiency non-volatilely increases more than one order.Based on this,retina synapse-like vision functions are mimicked.Optoelectronic short-term and long-term plasticity,as well as basic neuromorphic learning and memory rule are achieved without applying driving voltage.Our work highlights the potential of ferroelectric p-n junctions for enhanced solar cell and low-power optoelectronic synaptic device for neuromorphic machine vision.

关键词： ferroelectric p-n junction reconfigurable rectification reconfigurable PV effect optoelectronic synaptic devices

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CRP Binding Kinetics Enhancement Using Local Narrowing into a Bent Channel: Finite Element Analysis

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Engineering（科研） 2022年第1期14卷 62-75页

作者： Mohamed Bahri Imen Dermoul Marshet getaye Mohamed Amin Elaguech Khouloud Djebbi Mounir Ben Ali Chaker Tlili Deqiang Wang Chongqing School University of Chinese Academy of Sciences Chongqing China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China University of Chinese Academy of Sciences Beijing China Preparatory Institute for Engineering of Nabeul IPEIN University of Carthage Campus Universitaire Merazka Tunisia NANOMISENE Lab LR16CRMN01 Centre for Research on Microelectronics and Nanotechnology of Sousse Technopole of Sousse Sousse Tunisia University of Sousse Higher Institute of Applied Sciences and Technology of Sousse GREENS-ISSAT Cité Ettafala Sousse Tunisia

Binding kinetics enhancement of a microfluidic biosensor into a micro-channel through the application of a supplementary mechanism has received tremendous attention because of the obtained significant enhancement factor. However, biosensor’s performance enhancement using only simple channel engineering is still rarely realized. Herein, we present a novel design of a complex reactive protein (CRP) biosensor into a U-shaped channel with a sensitive membrane located in the middle of the bent zone. Various critical factors affecting the equilibrium binding time are numerically investigated. The turn geometry is then optimized when the arc length along the inner and outer radii is almost the same, which leads to locally minimizing the channel height overhead the reaction surface and improves the analyte transport towards the sensing area. The numerical studies reveal that applying a local narrowing above the reaction surface can notably enhance the trapping and the surface formation of complex antibody-antigen, thus upgrading the biosensor performance. This work puts a significant advance towards microfluidic channel engineering and the exploration of micro-flow injection experimental studies.

关键词： Finite Elements Method Binding Reaction CRP Biosensor Microfluidic System Microchannel Turn Numerical Simulation

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