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A Porous Nano-Micro-Composite as a High-Performance Bi-Functional Air Electrode with Remarkable Stability for Rechargeable Zinc-Air Batteries

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Nano-Micro Letters 2020年第10期12卷 87-102页

作者： yasir arafat Muhammad Rizwan Azhar Yijun Zhong Xiaomin Xu Moses OTadé Zongping Shao WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6845Australia School of Engineering Edith Cowan UniversityPerthWA 6027Australia State Key Laboratory of Materials‑Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuPeople’s Republic of China

The development of bi-functional electrocatalyst with high catalytic activity and stable performance for both oxygen evolution/reduction reactions(OER/ORR)in aqueous alkaline solution is key to realize practical application of zinc-air batteries(ZABs).In this study,we reported a new porous nano-micro-composite as a bifunctional electrocatalyst for ZABs,devised by the in situ growth of metal-organic framework(MOF)nanocrystals onto the micrometersized Ba0.5Sr0.5Co0.8Fe0.2O3(BSCF)perovskite *** carbonization,MOF was converted to porous nitrogen-doped carbon nanocages and ultrafine cobalt oxides and CoN4 nanoparticles dispersing inside the carbon nanocages,which further anchored on the surface of BSCF *** homogeneously dispersed BSCF perovskite particles in the surfactant;subsequently,ZIF-67 nanocrystals were grown onto the BSCF *** this way,leaching of metallic or organic species in MOFs and the aggregation of BSCF were effectively suppressed,thus maximizing the number of active sites for improving *** BSCF in turn acted as catalyst to promote the graphitization of carbon during pyrolysis,as well as to optimize the transition metal-tocarbon ratio,thus enhancing the ORR catalytic activity.A ZAB fabricated from such air electrode showed outstanding performance with a potential gap of only 0.83 V at 5 mA cm-2 for OER/***,no obvious performance degradation was observed for the continuous charge-discharge operation for 1800 cycles over an extended period of 300 h.

关键词： BSCF perovskites ZIF-67 Porous carbon Zn-air batteries Oxygen evolution reaction Oxygen reduction reaction

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Suicide in Nigeria:observations from the content analysis of newspapers

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General Psychiatry 2021年第1期34卷 30-36页

作者： Tosin Philip Oyetunji S M yasir arafat Stephen Oluwaseyi Famori Timilehin Blessing Akinboyewa Michael Afolami Moyo Faith Ajayi Sujita Kumar Kar Department of Human Nutrition Faculty of Public HealthCollege of MedicineUniversity of IbadanIbadanOyoNigeria Department of Psychiatry Enam Medical College and HospitalSavarBangladesh Department of Geology University of IbadanIbadanOyoNigeria Department of Psychology Adekunle Ajasin UniversityAkungba-AkokoOndoNigeria Department of International Relations Obafemi Awolowo UniversityIle-IfeOsunNigeria Department of Psychiatry King George's Medical UniversityLucknowU.PIndia

Background Suicide is a global public health problem and Nigeria is one of the epicentres of suicide in the ***,there is a dearth of research exploring the epidemiological aspects of suicide in *** To examine the demographic information and precipitating events for suicides in Nigeria by analysing the contents of newspaper reports of *** We searched,collected,and analysed published news reports about suicide from 10 English newspapers in Nigeria.A total of 350 suicide reports were assessed between January 2010 and December 2019 after screening and *** The mean(SD)age of the reported cases was 36.33(15.48)*** of the reported cases were male(80.6%),married(51.8%),students(33.6%),living in a semi-urban area(40.3%)and among the age group of 25-34(25.3%).Hanging(48.6%)and poisoning(32.2%)were the most commonly reported methods of *** constraints and marital conflicts were most commonly assumed precipitating *** This study suggests that being male,married,or living in semi-urban areas are associated with suicide in *** community-based studies are warranted to generalise the findings and adopt appropriate preventive strategies.

关键词： newspaper finding content

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Mechanistic Study of Ruthenium(III) Catalyzed Oxidation of Cyclohexanone by Acidic Bromate

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Journal of Surface Engineered Materials and Advanced Technology 2018年第2期8卷 27-36页

作者： yasir arafat Lone Masood Ayoub Kaloo Faizan Danish Khaleel Department of Chemistry Lovely Professional University Phagwara India Department of Chemistry Government Degree College Shopian India Department of Chemistry Islamic University of Science and Technology Awantipora India

In this work, kinetics and mechanism of Ru(III) catalyzed oxidation of cyclohexanone by acidified solution of potassium bromate has been studied. Present study employ mercuric acetate Hg (OAc)2 as a scavenger for Br¯?ion to prevent parallel oxidation by bromine. The kinetics and mechanism have also been studied in the temperature range of 30°C - 45°C. The reaction exhibits first order kinetics with respect to Ru (III), while zero order kinetics with respect to KBrO3 and HClO4. The influence of Hg(OAc)2 and ionic strength on the rate of reaction was found to be insignificant. Positive effect in the reaction mixture was also observed upon addition of chloride ion;while as the negative effect was revealed with acetic acid. A suitable mechanism in conformity with the kinetic observations has been proposed and the rate law is derived on the basis of obtained data. The various activation parameters such as energy of activation (ΔE*), Arrhenius factor (A), entropy of activation (ΔS*) were calculated from the rate measurements at 30°C, 35°C - 40°C and 45°C.

关键词： Kinetics Ru (III) Oxidation Ketone Bromate Acidic Order

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Impact of Ursodeoxycholic Acid on Gall Stone Formation Post Bariatric Surgery

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Surgical Science 2023年第3期14卷 240-251页

作者： Afra Amin yasir arafat Mohammed Alkhayat Mohannad Eledreesi Sultan Alotaibi Omnia Othman Taif Aramid Forces Hospital Taif Saudi Arabia

Introduction: Bariatric surgery is identified as highly effective therapy for obesity and help to loss wight that is become important public health priority because it increases the risk of condition including diabetes, cardiovascular disease, and several types of cancer whether by accomplishing mini-gastric bypass, Gastric bypass (Roux-en-Y) and sleeve gastrectomy [1] rapid weight loss increased incidence risk of gall stone formation [2]. Ursodeoxycholic acid is a bile acid which affect a reduction in cholesterol in biliary fluid primary by dispersing the cholesterol and forming a liquid-crystal phase [2], it’s can play a significant role in preventing of gall stone formation. Objective: Study potential effect of Ursodeoxycholic acid (UDCA) on gall stone formation after bariatric surgery. Methods: This study Cross-sectional Trials, review of all patient underwent bariatric surgery November 2021-Jun 2022, Taif Military Hospital in the department of surgery, the sample of study will be around 143 participants or more, data collection all patient underwent bariatric surgery. Results: A Total of 160 patients underwent bariatric surgery in Taif Armed Forces Hospitals from 2015 to 2021. Of these, 53 were male (33.1%) and 107 were female (66.9%). only 33 patients (20.6%) received Ursodeoxycholic acid, and 127 patients (79.4%) weren’t proscribed for them. However, 40 patients (25%) develop gall stone and underwent cholecystectomy, three of them were on Ursodeoxycholic acid (9%) and 37 patients weren’t on Ursodeoxycholic acid (29%). which shows that Ursodeoxycholic acid remarkable reduce the risk of gall stone formation post wight reduction surgery. Conclusion: In conclusion, bariatric procedures come with the risk of leading to the formation of gallstones. This is especially in the stage when a patient experiences rapid loss of weight. This is why a preventive measure is necessary and UDCA have been considered for this purpose. This study has shown that patients who use UD

关键词： Ursodeoxycholic Acid Gallstone Bariatric Surgery

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不同肥料对退化茶园根际土壤微生物代谢活性和群落结构的影响

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生态学杂志 2017年第10期36卷 2894-2902页

作者：蒋宇航林生林伟伟陈婷 yasir arafat 位小丫林文雄福建省农业生态过程与安全监控重点实验室福建农林大学生命科学学院福州350002 作物生态与分子生理学福建省高校重点实验室福建农林大学福州350002

于福建省安溪县桃舟乡,选择宿根连作20年茶园进行田间试验。以未施肥(CK)、氮肥(NF)、羊粪(GM)及豆科绿肥(LF)等处理后的茶树根际土壤作为供试土样,分析不同肥料对茶树根际土壤理化特性、微生物代谢活性及其不同类型磷脂脂肪酸含量变化... 详细信息

于福建省安溪县桃舟乡,选择宿根连作20年茶园进行田间试验。以未施肥(CK)、氮肥(NF)、羊粪(GM)及豆科绿肥(LF)等处理后的茶树根际土壤作为供试土样,分析不同肥料对茶树根际土壤理化特性、微生物代谢活性及其不同类型磷脂脂肪酸含量变化等影响。结果表明:NF、GM和LF均能够提高茶园土壤pH值和有机质(OM)及速效钾(AK)等含量,其pH分别提高0.47%、2.36%和2.13%;OM分别提高17.56%、27.48%和54.96%;AK分别提高56.10%、63.41%和73.17%;碱解氮(AN)和速效磷(AP)在NF处理下分别下降了9.10%和335.00%;在GM处理下分别提高了17.06%和2.11倍;在LF处理下分别提高了16.70%和3.88倍;同时,施肥能提高土壤脲酶、蔗糖酶、多酚氧化酶和过氧化物酶等活性,且提高效果由高到底依次为LF、GM、NF;酸性磷酸酶活性(ACP)和微生物对磷素利用率(UTP)在NF处理下分别降低70.04%和249.00%;在GM处理下分别提高了24.74%和1.80倍;在LF处理下分别提高34.28%和2.51倍;与此同时,GM和LF还能够提高根际土壤微生物群落丰度以及菌群多样性。综上所述,豆科绿肥和羊粪能够有效改善茶园土壤肥力,促进根际微生物对养分的代谢活性,对提升茶园经济效益和生态效益具有现实意义。

关键词：羊粪氮肥豆科绿肥茶树根际土壤微生物群落

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How far has panic buying been studied?

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World Journal of Meta-Analysis 2020年第6期8卷 446-460页

作者： S M yasir arafat Fahad Hussain Sujita Kumar Kar Vikas Menon Kum Fai Yuen Department of Psychiatry Enam Medical College and HospitalDhaka 1340Bangladesh Department of Pharmacy Noakhali Science and Technology UniversityNoakhali 3814Bangladesh Department of Psychiatry King George’s Medical UniversityLucknow 226003India Department of Psychiatry Jawaharlal Institute of Postgraduate Medical Education and ResearchPuducherry 605006India School of Civil and Environmental Engineering Nanyang Technological UniversitySingapore 639798Singapore

BACKGROUND Although panic buying(PB)is a ubiquitous behavior,it became prominent during the coronavirus disease 2019 ***,studies are inadequate to explore the different aspects of it,even though it covers several perspectives of life and academic *** To assess the research that have been conducted on *** A search was conducted to identify the articles in PubMed,PubMed Central,Scopus,and Google Scholar using the search term“panic buying”on November 15,2020.A total of 104 articles was extracted from the initial *** removing duplicates and initial and full-text screening,42 articles were included in the *** only considered peer-reviewed published articles that can be downloaded in a full portable document *** published in other languages and preprints were *** Among the 42 articles,27 were original contributions,6 were correspondences,3 were commentaries,3 were review articles,and there was one each for editorial,opinion,and discussion type of *** domains have been researched such as psychology,responsible factors,supply chain,management,disaster preparedness,e-commerce,consumer behavior,marketing,prevention strategies,media,social network,economics,personality,and *** from several disciplines,such as psychiatry,management,economics,business,sales and marketing,consumer behavior,public health,communication,information management,sociology,engineering,business administration,psychology,nursing,health economics,food policy,epidemiology,and community health,have been studied ***,causative model,econometric model,controlling strategy,and measuring instrument have been reported.A total of 18 papers had cross-country collaboration,and ten were funded *** of the authors were affiliated with the institutions of Australia,Bangladesh,China,India,Singapore,and the United *** PB is a relatively newer concept to get the attention of the research communit

关键词： Panic buying Systematic review COVID-19 Pandemic Disaster Supply chain

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