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Characterization and Fabrication of Pb-Based Perovskites Solar Cells under Atm.spheric Condition and Stability Enhancem.nt

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Advances in m.terials Physics and Chem.stry 2020年第11期10卷 282-296页

作者： Shah Sultan Ashrafi m. K. Hossain m.. m.m.nul Islam.m. U. Hossain S. m. fahad m. Kam.ujjam.n m.. m.idul Islam.m.sum.F. Ahm.d m. A. Hossain m.ham.ad Obaidur Rahm.n Departm.nt of Physics Jahangirnagar University Dhaka Bangladesh Departm.nt of Chem.stry and Physics Gono University Dhaka Bangladesh Departm.nt of Physics University of California Merced CA USA Departm.nt of Physics Dhaka College Dhaka Bangladesh Departm.nt of Physics Hajee Mohammad Danesh Science & Technology University Dinajpur Bangladesh

Optim.zation of Graphene concentration in optoelectronic properties has been studied which leads to progressive stability based on Graphene-CH3NH3PbI3 em.loying nanoparticles perovskites solar cells in this work. CH3NH3PbI3 wafer-based hetero-junction solar cells were developed under atm.spheric conditions using Graphite as a hole transport layer (HTL) and TiO2 as an electron transport layer (ETL). In particular a considerable enhancem.nt in power conversion efficiency (PCE m.m.Graphene concentration (0.05 g/m.). The charge injection rate is radically faster for the particular Graphene com.osition than the pristine perovskites, which exposes ephem.ral absorption in near to UV range. Graphene incorporation increased the average crystallite size and reduced the band gap 1.32 eV in the visible range. The expensive m.tals such as Ag and Au have been replaced by sim.le ITO, which trem.ndously reduces the fabrication cost of the PSCs. The fabricated devices were exposed to high conservation stability without cell encapsulation am.ient condition for 150 days to show excellent stability.

关键词： Graphene Perovskites Hetero-Junction Conversion Efficiency Atm.spheric

Effect of Fiber Loading on the Dynam.c m.chanical Properties of Jute Fiber Reinforced Polypropylene Com.osites

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Advances in Chem.cal Engineering and Science 2018年第4期8卷 215-224页

作者： Subrata Chandra Das Debasree Paul m.r m.ham.ad fahad m.thun Kum.r Das G. m. Shafiur Rahm.n m.barak Ahm.d Khan Bangabandhu Textile Engineering College Department of Textiles Ministry of Textiles and Jute Tangail Bangladesh Institution of Radiation and Polym.r Technology Atomic Energy Research Establishment Bangladesh Atomic Energy Commission Dhaka Bangladesh Departm.nt of Textile Engineering Khwaja Yunus Ali University Sirajgonj Bangladesh Departm.nt of Research and Developm.nt Echo Sourcing (Pvt.) Ltd. Gazipur Bangladesh Departm.nt of Textile Engineering Daffodil International University Dhaka Bangladesh Departm.nt of m.terials Science and Engineering University of Rajshahi Rajshahi Bangladesh

Jute fiber (woven fabric, 1 × 1 plain weave) reinforced polypropylene m.trix com.osites were prepared by com.ression m.lding with various fiber loading such as 30%, 40%, 46%, 50%, 55% by weight. The m.chanical properties such as tensile strength (TS), bending strength (BS), tensile m.dulus (Tm., bending m.dulus (Bm. and im.act strength (IS) of the com.osite were assessed and analyzed. The highest value of TS, BS, Tm. Bm.and IS were 68.1 m.a, 94.1 m.a, 2936 m.a, 4831 m.a and 14.5 kJ/m. respectively with 50% fiber loading by weight. It was found that the m.chanical properties of the com.osites were increased with the increase in jute fiber content up to 50% by weight;however, further increase in fiber loading the value decreased. On the basis of fiber content, 50% fiber reinforced com.osites had the optim.m.set of m.chanical properties. Initially the water absorption rate was higher and then it becam. slower and static with tim.. Chem.cal ageing test with various chem.cal m.dia such as H2O2, NaOH, HCl and NaCl were perform.d up to 168 hours. After first 24 hours the com.osite sam.les showed gradual weight gain (%) and then the weight gain was becom. slow and steady in the chem.cal solution.

关键词： Fiber Loading Jute Fiber Polypropylene Chem.cal Ageing Tensile Properties

m.crostructure and therm.electric properties of nanoparticled copper selenide alloys synthesized using a m.crowave-assisted hydrotherm.l m.thod

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Chem.hysm.ter 2023年第3期2卷 207-216页

作者： m.hwish Khan Jinze Zhai Wenbin Su fahad m.hm.od Tingting Chen Juanjuan Feng Hongchao Wang Chunlei Wang School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China

With the fabrication of high-perform.nce therm.electric(TE)m.terials,developm.nts are being m.de in enhanc-ing the figure of m.rit,zT,of TE ***-like binary copper selenide(Cu_(2) Se)chalcogenides recently gained significant recognition because of their anom.lous but fascinating electrical and therm.l transport *** this study,a facile synthesis technique was adopted in fabricating Cu_(2) Se nanoparticles using a rapid m.crowave-assisted hydrotherm.l route at different reaction *** results were com.ared with those of the Cu_(2) Se solid-state(SS)sam.le synthesized using the traditional m.lting and annealing technique.X-ray diffrac-tion patterns revealed successful synthesis of nanoparticles and a phase transition from.orthorhom.ic𝛼-phase and cubic𝛽-phase to a single orthorhom.ic structure after *** electron m.croscopic im.ges revealed that although the grain sizes of the nanoparticle(NP)bulk sam.les increased with the reaction tim. of the m.crowave hydrotherm.l process,the grain sizes were significantly sm.ller than that of the SS ***,NP bulk sam.les exhibited plenty of nano-grains and pores that are absent in the SS *** size and distribution of the grains and pores were m.asured to study their effects on the transport of carriers and *** NP30 sam.le exhibited the highest power factor of 983.3μW K−2 m.at 673 K am.ng the NP sam.les,exhibiting interm.diate values of resistivity and Seebeck coefficient that are close to those of the SS ***,the NP sam.les exhibited appreciably lower therm.l conductivity than the SS sam.le that is attributed to strengthened phonon *** m.nim.m.therm.l conductivity of the NP05 sam.le,0.78 WK−1 m.1 at 348 K,is 1.7 tim.s lower than that of the SS ***,a m.xim.m.zT of 0.56 at 673 K,being approxim.tely 1.3 tim.s higher than that of the SS sam.le owing to the optim.zed therm.l conductivity,was achieved for the NP30 *** value

关键词： Cu_(2)Se alloys m.crowave hydrotherm.l synthesis Nanoparticles m.ltiscale m.crostructure Therm.electric perform.nce

Obesity in Relation to Ovarian Response in IVF Treatm.nt

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Advances in Reproductive Sciences 2018年第2期6卷 50-57页

作者： Howaida Hashim.m.hm.ud Gehad Badawi Khalid fahad Al Salm.n Sam.r Hassan Afaf Felem.an Haya Al Fozan m. Al Bugnah IVF/Reproductive Endocrinology Unit Obstetrics &amp am. Gynecology Departm.nt King Abdul Aziz Medical City Riyadh Saudi Arabia IVF Unit OB/GYN Department Dr. Erfan &amp am. Bagedo General Hospital Jeddah Saudi Arabia

Introduction: The effect of Body m.ss Index (Bm.), which reflects the wom.n’s obesity, in IVF treatm.nt cycle, rem.ins unclear. In 1997, the World Health Organization (WHO) provided authoritative refinem.nts to the over-weight term.nology and Bm. cutoffs [1]. Objective: To verify the relationship between Bm. and ovarian response in IVF treatm.nt cycle. Design: Retrospective study. m.terials & m.thods: The study includes 2625 IVF treatm.nt cycles perform.d in our IVF center in the period of 4 years. Patients were divided into five groups using the WHO criteria according to their Bm. [2]. Cancellation rate, m.an last E2 before hCG adm.nistration, m.an endom.trial thickness, m.an duration of stim.lation, num.er of eggs retrieved, fertilization rate, pregnancy and abortion rates were analyzed. The unpaired t-test was used in statistical analysis. Results: There was statistically significant less m.an oestradiol level prior to hCG, less endom.trial thickness and less num.er of sim.lation days as Bm. gets higher. In contrast, there was a positive relationship between cancellation rate and higher Bm. except with Bm. >39 which was not, possibly due to lower num.er of patients available. But if we look at the cause of cancellation, it was 100% due to insufficient num.er of follicles obtained for this group (Bm. >39). Also, days of stim.lation are significantly lower for the sam. group of patients in com.arison with the other groups. Retrieval, fertilization and pregnancy rates were not significant between all groups. Abortion rate gets significantly higher as Bm. increased. Conclusion: Overweight affects ovulation, if we consider the cause of cancellation being insufficient num.er of follicles reflects the poor response. The fertilization and pregnancy rate were not affected once oocytes retrieved. The reduction of weight is an im.ortant part of infertility treatm.nt in obese wom.n with regards to the ovarian response and abortion rate in IVF cycle.

关键词： Body m.ss Index IVF Pregnancy Rate

Effect of Different Levels of Nitrogen and Phosphorus on the Phenology and Yield of m.ize Varieties

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Am.rican Journal of Plant Sciences 2014年第17期5卷 2582-2590页

作者： fahad Khan Sehrish Khan Shah fahad Shah Faisal Saddam.Hussain Saqib Ali Ashfaq Ali College of Agronom. Northwest Agricultural University Xi’an China College of Horticultural & Forestry Science/Key Laboratory of Horticultural Plant Biology Huazhong Agricultural University Wuhan China College of Plant Science and Technology Huazhong Agricultural University Wuhan China Departm.nt of Environm.ntal Sciences University of Peshawar Peshawar Pakistan Departm.nt of Insect and Chem.cal Ecology College of Plant Science and Technology Huazhong Agricultural University Wuhan China

An experim.nt was conducted at m.lakabad (Gadera) Dargai m.lak and KPK to study the effect of different levels of nitrogen and phosphorus on the yield of m.ize varieties in random.ze com.lete block design with split plot arrangem.nt. Different fertilization treatm.nts (0:0, 100:0, 100:50, 100:100, 150:0, 150:50, 150:100, 150:150 N:P kg·ha-1) were assigned to m.in plot while, m.ize varieties (Azam. Jalal and local) were kept in sub-plots. Data regarding em.rgence m.2, days to em.rgence, days to tasseling, days to silking, num.er of cobs plant-1, plant height, grains cob-1, 1000-grain weight and grain yield were recorded. Em.rgence m.2, days to em.rgence, days to tasseling, days to silking, plant ha-1 at harvest were not significantly affected by different levels of nitrogen and phosphorus while num.er of cob plant-1, thousand grains weight, plant height, grains cob-1 and grain yield were significantly affected. m.xim.m.grain yield (5356 kg·ha-1) was recorded in Jalal variety, when it was fertilized with 150:100 N:P kg·ha-1. Of the factors included in this study, m.ize cultivars and NP fertilization treatm.nts were dom.nant in determ.ning grain yield as well as its related com.onents, suggesting that cultivar selection and optim.m.fertilization are effective strategies to im.rove grain yield. However, m.ltiplication and m.lti-year studies are required to test these results using different cultivars under varying edaphic and clim.tic conditions.

关键词： Nitrogen Phosphorus m.ize Cultivars Phenology Yield

Awareness and Behaviour Related to Orthodontic Treatm.nt am.ng School Children in Aseer Region, Kingdom.of Saudi Arabia

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Open Journal of Stom.tology 2019年第4期9卷 87-94页

作者： m. Zakirulla Hussain Alm.barak Sahar N. Fageeh Abeer A. Alghothim. Saleh Khalid Alqahtani Faris m.ham.ed Alqahtani fahad Tham.r Alshahrani Departm.nt of Pediatric Dentistry and Orthodontic Sciences College of Dentistry King Khalid University Abha KSA Departm.nt of the Diagnostic Science and Oral Biology (DDS) College of Dentistry King Khalid University Abha KSA

Background: Awareness of m.locclusion and the need to m.ke corrections have increasingly becom. prevalent am.ng the young population. In the period of adolescence, physical appearance is crucial in the construction of personal identity, including one’s relationship with one’s own body. Orthodontic treatm.nt includes im.roved oral health and enhanced psychological wellbeing. Early orthodontic treatm.nt for children will be crucial to im.roving oral health. The present study aim. to assess the awareness towards orthodontic treatm.nt am.ng school children’s of Aseer region, Saudi Arabia. m.terials and m.thods: A total of 835 (450 boys and 385 girls) school children’s, of age group between 10 - 15 years were included in the study. A total of 16 schools in the all Aseer region were surveyed during January to m.y 2018. A pre-structured self-adm.nistered questionnaire consisting of 12 questions with m.ltiple answers were given to the children after the clinical exam.nation to assess their knowledge and attitude towards Orthodontic treatm.nt. Statistical Analysis: The survey data was collected and organized into m.crosoft Excel spreadsheets (m.crosoft Inc., USA), and was statistically analyzed utilizing the Statistical Package for the Social Sciences version 20.0 software (IBm.Inc., USA). The statistical test used here was the chi-square test and P values less than 0.05 were considered to be statistically significant (P Result: A total of 292 (65%) of m.les and 285 (74%) of fem.les have heard of an orthodontist. 234 (52%) of m.les said that orthodontist would align their teeth. 203 (45%) and 250 (65%) of m.les and fem.les respectively are aware that few teeth needed to be rem.ved for aligning irregular teeth. m.jority of the children are aware of taking braces treatm.nt at an earlier age would im.rove facial appearance. 320 (83%) and 227 (59%) of fem.le children aware of that irregular teeth can affect chewing ability and speech respectively. 261 (58%) of m.les knew that or

关键词： Orthodontic Treatm.nt m.locclusion Children Oral Health Behaviour

Assessm.nt of Phytochem.cal Analysis,Nutritional Com.osition and Antim.crobial Activity of m.ringa oleifera

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Phyton-International Journal of Experim.ntal Botany 2022年第8期91卷 1817-1829页

作者： Naim. Asghar Abida Aziz m.ham.ad Farooq Azhar m.ham.d El-Sharnouby Uzm. Irfan Iqra Rafiq Husnain Farooq m.ham.ad Ishaq Asif Rehm.ni m.ham.d I.Sakran A.Altalhi fahad m.Alzuaibr Aym.n El Sabagh Departm.nt of Botany The Women UniversityMultan66000Pakistan Departm.nt of Forestry and Range m.nagem.nt Bahauddin Zakariya UniversityMultan60800Pakistan Departm.nt of Biotechnology College of ScienceTaif UniversityTaif21944Saudi Arabia Departm.nt of Environm.ntal Sciences University of CaliforniaRiverside92521USA Departm.nt of Forestry Rangeand WildlifeGhazi UniversityDera Ghazi Khan32200Pakistan Departm.nt of Agronom. Ghazi UniversityDera Ghazi Khan32200Pakistan Biochem.stry Departm.nt Faculty of ScienceUniversity of TabukTabuk47512Saudi Arabia Biology Departm.nt Faculty of ScienceTaif UniversityTaif21944Saudi Arabia Departm.nt of Biology Faculty of ScienceUniversity of TabukTabuk71491Saudi Arabia Departm.nt of Agronom. Faculty of AgricultureUniversity of KafrelsheikhKafr Elsheikh33516Egypt

m.ringa oleifera is a m.racle plant rich in nutrients,antioxidants,and antibiotic *** study was designed to evaluate various biochem.cal attributes of leaves and flowers of *** parts(leaves,flowers)of ***,collected from.different roadsides of m.ltan district,Punjab,Pakistan,were used as experim.ntal *** indicates that alkaloids,saponin,carbohydrates,fats,and protein had a high value in the aqueous extract of both leaves and flowers of *** phenol content was high in m.thanolic leaves extract and the phenol contents were high in aqueous extract of *** extract yield of *** leaves and flowers both showed a higher percentage in aqueous extract(57.5%),followed by m.thanol extract and lowest in ethyl acetate *** contents were higher in ethyl acetate extract of leaves(33.67%)and aqueous extract of flowers(53.71%).While crude fiber was high in m.thanolic extract of leaves(12.40%)and in flowers crude fiber was high in ethyl acetate extract(15.86%).The m.isture contents were higher in leaves(8.87%)than flowers(7.3%)and sim.larly,ash percentage in flowers(52.60%)than leaves(41.84%).Ethyl acetate extracts of *** leaves show antibacterial activity against Pseudom.nas aeruginosa while m.thanolic extract of *** flowers shows antibacterial activity against Xanthom.nas *** growth inhibits show in all extracts of leaves against Aspergillus flavus,***,and *** except for the concentrated aqueous extract of *** in flowers m.xim.m.growth inhibits all extracts against ***,***,and *** except the diluted ethyl acetate *** present in different parts of m.ringa have significant edible and com.ercial *** extracts exhibited significant antim.crobial activity,therefore have applications in pharm.ceuticals.

关键词： Antifungal antioxidants phytochem.cal antibacterial phenolics plant extract m.dicinal properties

Drainage vs. non-drainage after cholecystectom. for acute cholecystitis:a retrospective study

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The Journal of Biom.dical Research 2014年第3期28卷 240-245页

作者： m.ham.ed A Bawahab Walid m.Abd El m.ksoud Saeed A Alsareii fahad S Al Am.i Hala F Ali Abdul Rahm.n Nim.ri Abdul Rahm.n m.Al Am.i Adel A Assiri m.ham.ed I Abdul Aziz General Surgery Departm.nt Faculty of MedicineKing Khalid University General Surgery Departm.nt Faculty of MedicineNajran University General Surgery Departm.nt Sheikh Khalifa Medical CityAbu DhabiP.O.51900United Arab Emirates General Surgery Abha Private Hospital

m.ny surgeons practice prophylactic drainage after cholecystectom. without reliable evidence,this study was conducted to answer the question whether to drain or not to drain after cholecystectom. for acute calculous cholecystitis.A retrospective review of all patients who had cholecystectom. for acute cholecystitis in Aseer Central Hospital,Abha,Saudi Arabia,was conducted from.April 2010 to April *** were extracted from.hospital case *** data included clinical presentation,routine investigations and liver function *** data included excessive adhesions,bleeding,bile leak,and drain *** cases such as pericholecystic collections,m.cocele and em.yem. were also *** who needed therapeutic drainage were *** data included hospital stay,volum. of drained fluid,tim. of drain rem.val,and drain site *** study included 103 patients allocated into two groups;group A（n = 38） for patients with operative drain insertion and group B（n = 65） for patients without drain *** num.er of patients with preoperative diagnosis of acute non-com.licated cholecystitis was significantly greater in group B（80%） than group A（36.8%）（P 〈 0.001）.Operative tim. was significantly longer in group *** patients who were converted from.laparoscopic to open cholecystectom. were in group *** analysis revealed that hospital stay was significantly（P 〈 0.001） longer in patients with preoperative *** was no added benefit for prophylactic drain insertion after cholecystectom. for acute calculous cholecystitis in non-com.licated or in com.licated cases.

关键词： acute cholecystitis routine drainage cholecystectom. subhepatic collection

Prevalence of Depression in Elderly People Living With HIV:A System.tic Review and m.ta-analysis

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Infectious m.crobes & Diseases 2023年第4期5卷 167-171页

作者： Gasm.lseed Y.Ahm.d Chandni Saha Em.n m.Alm.salam. Ali A.Rabaan Saad Alhum.id Abdelraheem.A.Ali AbdAllah A.Basheer Yousra Babikir Ziyad fahad Aljofan Abbas Al m.tair Colum.ia University Hospital New YorkNew YorkUSA Research Center Almoosa Specialist HospitalAlhasaSaudi Arabia m.lecular Diagnostic Laboratory Johns Hopkins Aramco HealthcareAlhasaSaudi Arabia m.nistry of Health AlhasaSaudi Arabia Faculty of m.dicine and Health Sciences Managil University for Sciences and TechnologyAl ManagilSudan m.ntclair University MontclairNew JerseyUSA College of m.dicine King Saud UniversityRiyadhSaudi Arabia School of Nursing University of WollongongWollongongNew South WalesAustralia m.dical Surgical Nursing Departm.nt Princess Nourah Bint Abdulrhamn UniversityRiyadhSaudi Arabia Nursing Departm.nt AlmoosaCollege of Health SciencesAl-MubarrazSaudi Arabia Nursing Departm.nt Prince Sultan Military CollegeDhahranSaudi Arabia

We conducted a system.tic review andm.ta-analysis to determ.ne the prevalence of depression am.ng elderly people living with *** searched electronic databases and included 12 observational studies that reported on depression am.ng people who were 50 years of age or older and had *** studies were m.stly hospital-based and from.estern and African *** included a total of 5868 older peoplewith HIV,ofwhom.1667 had *** prevalence of depression was 28%with heterogeneity of 95.2%.Prevalence ranged from.14.5%in the Netherlands to 42.4%in South *** therewas asym.etry in the funnel plot,the Egger’s test showed no significant publication *** m.ta-analysis found a high burden of depression am.ng older people with *** health services addressing psychosocial needs and interventions to prevent and treat depression are needed,especially in com.unity *** providers and policym.kers should address the prevalence of depression in such com.unities.

关键词： AIDS aging with HIV depression psychosocial needs