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Optimizing Fluid Flow Cooling in Gas Transmission Systems

Fluid Dynamics & Materials Processing 2022年第4期18卷 1099-1109页

作者： Gunawan Widjaja Mohaimen al-Thamir Farshid Mehran Lis M.Yapanto Irina N.Fardeeva alim al ayub ahmed Supat Chupradit V.A.Kukushkina Oleg R.Kuzichkin Universitas Krisnadwipayana Senior Lecturer Faculty of Public Health Universitas IndonesiaFaculty of Law Universitas KrisnadwipayanaJawa Barat13077Indonesia Scientific Research Center Al-Ayen UniversityThi-Qar64001Iraq Islamic Azad University Jolfa International BranchJolfa***Iran Departement of Aquatic Management Faculty of Fisheries and Marine ScienceUniversitas Negeri GorontaloGorontalo96128Indonesia Kazan Federal University Kazan420008Russia School of Accounting Jiujiang UniversityJiujiang33200China Department of Occupational Therapy Faculty of Associated Medical SciencesChiang Mai UniversityChiang Mai50200Thailand Lipetsk State Technical University Lipetsk398600Russia Department of Information and Robototechnic Systems Belgorod State UniversityBelgorod308015Russia

In this study,structural theory was used to examine the geometric configuration of channels embedded inside an object in the presence of internal heat generation for cooling by a heat transfer *** growth and development of gas transmission lines and the lack of up-to-date integrated information systems have made the design and maintenance of pipelines,as well as the handling of problems caused by various accidents in the pipeline,very complex in many *** accurate descriptive and spatial information in tolls on gas transmission line maps such as pipes,booster stations,valves,and forks in a spatial reference database can engage planners,operators,and paramedics in a variety of *** are used to help in the direction of optimal and purposeful ***,in this paper,by considering appropriate laboratory conditions and numerical experiments and calculations,it is possible to determine the optimal attraction of duct holes for cooling components of the gas transmission system,so that the industry can produce and developed gas transmission without *** this study,in addition to studying the geometric characteristics of channel spacing and their length,the dimensions of a specific channel for reducing the maximum produced temperature are also discussed.

关键词： Cooling component duct hole gas transmission line pipeline cooling system

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Application of Vortex Generators to Remove Heat Trapped in Closed Channels

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Fluid Dynamics & Materials Processing 2023年第1期19卷 15-24页

作者： alim al ayub ahmed Salim Oudah Mezan Binyamin Murtadha Doghiam Abdullah Elena Tesleva Linar G.Akhmetov Rustem Zalilov Mustafa M.Kadhim Abduladheem Turki Jalil School of Accounting Jiujiang UniversityJiujiang332000China General Directorate of Education in al-Muthanna Governorate Ministry of EducationSamawah66001Iraq Department of Mechanical Engineering Faculty of Science and TechnologyUniversitas Muhammadiyah Kalimantan TimurSamarinda75124Indonesia College of Petroleum Engineering Al-Ayen UniversityThi-Qar64001Iraq National Research Tomsk Polytechnic University Tomsk634050Russia Kazan Federal University Kazan420008Russian Nosov Magnitogorsk State Technical University Magnitogorsk455000Russia Department of Dentistry Kut University CollegeKutWasit52001Iraq College of Technical Engineering The Islamic UniversityNajaf7003Iraq Department of Pharmacy OsolAldeen University CollegeBaghdad993P+PWXIraq Faculty of Biology and Ecology Yanka Kupala State University of GrodnoGrodno230023Belarus

The utilization of vortex generators to increase heat transfer from cylinders installed inside a duct is *** particular,a channel containing eight cylinders with volumetric heat sources is considered for different values of the Reynolds *** effective possibility to use vortex generators with different sizes to increase heat transfer and,consequently,reduce the surface temperature of the cylinders is ***,the amount of pressure drop inside the channel due to the presence of vortex generators is considered and compared with the cases without vortex *** results show that although the addition of generators increases the pressure drop,it strongly contributes to increase the heat transfer coefficient inside the duct(up to 80–90%).

关键词： Vortex generators heat trapped temperature of hot surfaces heat transfer

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Optimization of the Cooling System of Electric Vehicle Batteries

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Fluid Dynamics & Materials Processing 2022年第3期18卷 835-850页

作者： A.Heri Iswanto Iwan Harsono alim al ayub ahmed Sergushina Elena Sergeevna Stepan Krasnikov Rustem Zalilov John William Grimaldo Guerrero Liliya N.Latipova Safa Kareem Hachim Public Health Department Faculty of Health ScienceUniversity of Pembangunan Nasional Veteran JakartaJakarta16426Indonesia Universitas Mataram West Nusa Tenggara83116Indonesia School of Accounting Jiujiang UniversityJiujiang330300China National Research Ogarev Mordovia State University Saransk430005Russia Russian Technological University Moscow119454Russian Nosov Magnitogorsk State Technical University Magnitogorsk455000Russian Departamento de Energía Universidad de la CostaBarranquilla080002Colombia Kazan Federal University Kazan628400Russia College of Technical Engineering The Islamic UniversityNajaf54001Iraq

The most important components of electrical vehicles are the battery and the related cooling *** subsystems play a major role in determining the overall electric vehicle *** this study,a novel cooling system with fluid in the battery cell is proposed,by which the energy storage system can be optimized through control of the temperature of the batteries.A sensitivity analysis is conducted considering the maximum temperature,the heat rate,the coolant temperature,and the geometry of the *** numerical simulations show that the parameters for the trapezoidal compartment have an impact on the thermal performance of *** optimal geometry is proposed *** is concluded that for high values of Reynolds number for which the flow becomes turbulent,a decrease in the battery temperature can be obtained thereby avoiding thermal stresses.

关键词： Thermal flow batteries geometry cavity cooling system

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Use of Scrapped Rubber Tires for Sustainable Construction of Manhole Covers

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Journal of Renewable Materials 2021年第5期9卷 1013-1029页

作者： Sadaqat Ullah Khan Afzal ahmed Sajjad ali Ayesha ayub ahmed Shuja Muhammad Ahsan Shahid Department of Urban and Infrastructure Engineering NED University of Engineering and TechnologyKarachi75270Pakistan Department of Civil Engineering NED University of Engineering and TechnologyKarachi75270Pakistan

Scrapped tires from vehicles are produced in large quantities. Despite numerous existing uses of scrapped tires, alarge quantity ends up at the landfill sites, which contributes to environmental degradation. The development ofmore applications of scrapped tire usage can reduce the disposal of tires at landfill sites. This research proposes anovel use of scrapped tires by using the strips taken from scrapped tires in replacement of steel bars as reinforcement. Manhole covers were produced using scrapped tires by completely replacing the steel with scrapped *** different samples of manhole covers were prepared and tested. The highest bearing capacity of 25.5 kN wasrecorded with a sample of 100 mm thickness made with cementitious composite, which is 2.25 times higher thanthe bearing capacity of a conventional reinforced-concrete manhole cover. The use of manhole covers made withscrapped tires can effectively address the theft issue of manhole covers. The lifecycle cost analysis shows that themanhole cover made with scrapped tires is 3.4 times more cost-effective in comparison with the conventionalmanhole cover. This research shows a new avenue of the potential use of scrapped tires as reinforcement in structures, which can improve sustainable construction practices.

关键词： Scrapped tires sustainability manhole cover waste management recycling

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Autologous CD34^+ and CD133^+ stem cells transplantation in patients with end stage liver disease

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World Journal of Gastroenterology 2010年第42期16卷 5297-5305页

作者： Hosny Salama Abdel-Rahman N Zekri Abeer A Bahnassy Eman Medhat Hanan A Halim Ola S ahmed Ghada Mohamed Sheren A al alim Ghada M Sherif Tropical Medicine Department El-Kasr Al-Aini School of MedicineKasr Al-Aini st.Kasr AlAini11977 CairoEgypt Virology and Immunology Unit Cancer Biology DepartmentNational Cancer InstituteCairo UniversityKasr Al-Aini st.Fom El-Khaleeg11976 CairoEgypt Pathology Department National Cancer InstituteCairo UniversityKasr Al-Aini st.Fom El-Khaleg11976 CairoEgypt Biostatistics and Epidemiology Department National Cancer InstituteCairo University11976 CairoEgypt

AIM:To assess the utility of an autologous CD34 + and CD133 + stem cells infusion as a possible therapeutic modality in patients with end-stage liver ***:One hundred and forty patients with endstage liver diseases were randomized into two *** 1,comprising 90 patients,received granulocyte colony stimulating factor for five days followed by autologous CD34 + and CD133 + stem cell infusion in the portal *** 2,comprising 50 patients,received regular liver treatment only and served as a control ***:Near normalization of liver enzymes and improvement in synthetic function were observed in 54.5% of the group 1 patients;13.6% of the patients showed stable states in the infused *** of the patients in the control group showed *** adverse effects were ***:Our data showed that a CD34 + and CD133 + stem cells infusion can be used as supportive treatment for end-stage liver disease with satisfactory tolerability.

关键词： CD34 CD133 Stem cell Liver Hepatitis C virus

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Fentanyl and xylazine crisis:Crafting coherent strategies for opioid overdose prevention

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World Journal of Psychiatry 2024年第6期14卷 760-766页

作者： Lakshit Jain Jasleen Kaur Shahana ayub Danya Ansari Rizwan ahmed Abdul Qadir Dada Saeed ahmed Department of Psychiatry University of ConnecticutFarmingtonCT 06032United States Addiction Services Division Connecticut Valley HospitalMiddletownCT 06457United States Department of Psychiatry Institute of LivingHartfordCT 06102United States Department of Medicine Islamabad Medical and Dental CollegeIslamabad 44000Pakistan Department of Medicine Liaquat College of Medicine and DentistryKarachi 75290Pakistan Department of Medicine Trinity School of MedicineRoswellGA 30075United States Addiction Services and Dual Diagnosis Unit Saint Francis Hospital and Medical CenterHartfordCT 06105United States

The United States is in the throes of a severe opioid overdose epidemic,primarily fueled by the pervasive use of fentanyl and the emerging threat of xylazine,a veterinary sedative often mixed with *** high potency and long duration of fentanyl is compounded by the added risks from xylazine,heightening the lethal danger faced by opioid *** such as enhanced surveillance,public awareness campaigns,and the distribution of fentanylxylazine test kits,and naloxone have been undertaken to mitigate this ***-related overdose deaths persist despite these efforts,partly due to inconsistent policies across states and resistance towards adopting harm reduction strategies.A multifaceted approach is imperative in effectively combating the opioid overdose *** approach should include expansion of treatment access,broadening the availability of medications for opioid use disorder,implementation of harm reduction strategies,and enaction of legislative reforms and diminishing stigma associated with opioid use disorder.

关键词： Fentanyl Xylazine Opioid overdose Epidemic Opioid use disorder Buprenorphine Medications for opioid use disorder

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Structure Elucidation and Biological Screening of Bis(4-{[(E)-(2-Hydroxybenzylidene)amino]methyl}-cyclohexane-carboxylato-O)-triaqua-cadmium

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Chinese Journal of Structural Chemistry 2018年第6期37卷 871-877页

作者： MUHAMMAD Danish SABA Akbar MUHAMMAD Nawaz Tahir MUHAMMAD Naeem ahmed RABIA ayub Butt MUHAMMAD Asam Raza MUHAMMAD Ashfaq Department of Chemistry University of Gujrat Department of Physics University of Sargodha Department of Chemistry University of Azad Jammu and Kashmir

Using a bidentate ligand, a Schiff base 4-（{[（Z）-（2-hydroxyphenyl）methyldene]amino}methyl）cyclohexanecarboxylic acid, complex I（ML2, where M = Cd（Ⅱ）） was synthesized and characterized by IR spectroscopy and X-ray crystallography. It crystallizes in monoclinic system, space group C2/c, M_r = 685.04, 0.34 mm × 0.26 mm × 0.14 mm, a = 54.050（3）, b = 6.1220（3）, c = 9.5081（5） A, β = 90.229（2）°, Z = 4, C_（30） H_（40） CdN_2 O_9 and V = 3146.2（3） A^3. Complex I was screened for its bactericidal activity against four bacterial strains Chromohalobactersalexigens, Chromohalobacterisraelensis, Halomonashalofila and Halomonassalina and fungicidal activity against Aspergillusnigerand Aspergillusflavus. Antimicrobial activity results showed that the synthesized complex displayed good anti-fungal activity against two fungal strains. It was found to be inactive against four different bacterial strains analyzed and was negative for bactericidal effect.

关键词： Schiff base tranexamic acid Cd XRD fungicidal activity bactericidal activity

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4-((4-Chlorophenylsulfonamido)methyl)cyclohexanecarboxylic Acid： Synthesis, Crystal Structure and Biological Activities

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Chinese Journal of Structural Chemistry 2017年第8期36卷 1307-1314页

作者： MUHAMMAD Danish RABIA ayub Butt MUHAMMAD Nawaz Tahir MUHAMMAD Ashfaq SYEDA Tahira Hafeez MUHAMMAD Naeem ahmed HalEEMA Qureshi Department of Chemistry University of Gujrat Gujrat 50700 Pakistan Department of Physics University of Sargodha Sargodha Pakistan Department of Chemistry University of Azad Jammu and Kashmir Muzaffarabad 13100 Pakistan

In this study, a novel 4-（（4-chlorophenylsulfonamido）methyl）cyclohexanecarboxylic acid（C（14）H（18）ClNO4S） was synthesized by the reaction of tranexamic acid and 4-chlororbenzene sulfonyl chloride in basic medium at room temperature. The molecular structure was determined by FT-IR, NMR, elemental analysis and single-crystal X-ray analysis. The compound crystallizes in the monoclinic system, space group P21/c with a = 12.3120（11）, b = 16.5987（19）, c = 7.6873（7）？, β = 90.495（6）o, Z = 4 and V = 1570.9（3）？~3, crystal size（mm） = 0.38 × 0.16 × 0.14 and Rint = 0.045. In this compound, the carboxylic acid A（O（1）/C（1）/C（2）） and the sulfonyl B（O（3）/S（1）/O（4）） moieties are of course planar. The molecules are dimerized due to the O–H…O type of H-bonding with the R22（8） ring motifs. The dimmers are interlinked through C–H…O and N–H…O types of H-bonding. The synthesized compound was screened against four bacterial and two fungal strains and inactive against all strains. Antioxidant activity was checked against DPPH. Enzyme inhibition activity was carried out using three different enzymes and the title compound was more potent α-chymotrypsin inhibitor.

关键词： sulfonamide tranexamic acid 4-chlorobenzenesulfonyl chloride XRD biological applications

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Impact of non-alcoholic fatty liver disease on coronavirus disease 2019: A systematic review

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World Journal of Hepatology 2024年第8期16卷 1185-1198页

作者： Abdul Moeed Muhammad Omar Larik Muhammad ahmed ali Fahim Hafsah alim Ur Rahman Lubna Najmi Mah I Kan Changez Muhammad Moiz Javed Md al Hasibuzzaman Department of Internal Medicine Dow University of Health SciencesKarachi 74200SindhPakistan Department of Internal Medicine Dow International Medical CollegeKarachi 74200SindhPakistan Department of Internal Medicine Ziauddin UniversityKarachi 75000SindhPakistan Department of Research Yale UniversityNew Haven 06520CTUnited States Department of Internal Medicine King Edward Medical UniversityLahore 54000PunjabPakistan Institute of Nutrition and Food Science University of DhakaDhaka 1000Bangladesh Department of Medicine The Affiliated Hospital of Medical School of Ningbo UniversityNingbo 315211Zhejiang ProvinceChina

BACKGROUND Many studies have revealed a link between non-alcoholic fatty liver disease(NA-FLD)and coronavirus disease 2019(COVID-19),making understanding the relationship between these two conditions an absolute *** To provide a qualitative synthesis on the currently present data evaluating COVID-19 and *** This systematic review was conducted in accordance with the guidelines pro-vided by preferred reporting items for systematic reviews and meta-analyses and the questionnaire utilized the population,intervention,comparison,and outcome *** search strategy was run on three separate databases,PubMed/MEDLINE,Scopus,and Cochrane Central,which were systematically searched from inception until March 2024 to select all relevant *** addition,***,***,and Google Scholar were searched to identify grey *** After retrieval of 11 studies,a total of 39282 patients data were *** was found in 11.5%and 9.4%of people in NAFLD and non-NAFLD *** all,23.2%of NAFLD patients and 22%of non-NAFLD admissions diagnosed with COVID-19 were admitted to the intensive care unit,with days of stay *** support ranged from 5%to 40.5%in the NAFLD cohort and from 3.1%to 20%in the non-NAFLD *** incidence of acute liver injury showed *** improvement on days 7 and 14 between the two classifications was *** stay ranged from 9.6 days to 18.8 days and 7.3 days to 16.4 days in the aforementioned cohorts respectively,with 73.3%and 76.3%of patients being *** rates *** Clinical outcomes except mortality consistently showed a worsening trend in patients with NAFLD and concomitant *** research in conducting prospective longitudinal studies is essential for a more powerful conclusion.

关键词： Non-alcoholic fatty liver disease Coronavirus disease 2019 Mechanical ventilation Intensive care unit Acute liver injury

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Production of low cost <i>Bacillus thuringiensis</i>based-biopesticide for management of chickpea pod-borer <i>Helicoverpa armigera</i>(Huebn) in Pakistan

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Natural Science 2013年第11期5卷 1139-1144页

作者： Abida Bibi Khalique ahmed Najma ayub Sadia alam Department of Microbiology Quaid-i-Azam University Islamabad Pakistan Departmentof Microbiology University of Haripur Haripur Pakistan KarakuramUniversity Gilgit Pakistan

The biopesticide was prepared from locally available low cost ingredients: dried beef blood, molasses and mineral salts (ZnCl2, MgCl2, MnCl2, CaCl2CaCl2, and FeCl3) which were used as medium for the laboratory scale production of Bacillus thuringiensis (B.t.) bio-pesticide by shake flask technique. Indigenous B.t. isolate PA-Sb- 46.3 which produced two crystals—bi-pyramidal and cuboidal was found 73.6 times toxic against H. armigera than reference strain Bacillus thuringiensis var. kurstaki (HD-I-S-1980) used. Medium was fermented for 72 hours at 30℃ ± 2℃ and 160 rpm. 72 h fermented medium showed 95% - 99% sprulation, with spore yield of 3.97 × 109 spores/ml, and LC50 value to 1st instar larvae of H. armigera was 0.53 μg/ml diet. Preservatives and diluents used in the biopesticide were found to be effective to store at room temperature over a period of 30 months. These observations suggested that the biopesticide produced was effective and highly economical for the industrial scale production to manage H. armigera in Pakistan.

关键词： Beef Blood Molasses Indigenous B.t. Isolate PA-Sb-46.3 Sporulation Entomotoxicity Biopesticide

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