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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第9期14卷 774-784页

作者： Nadeem Akhtar ABBASI Tariq PERVAIZ ishfaq ahmed hafiz Mehwish YASEEN Azhar HUSSAIN Plant Tissue Culture Laboratory Department of HorticulturePir Mehr Ali Shah-Arid Agriculture University

In vitro cultures of loquat cultivar Mardan were established using shoot apices after treating with NaOCl (5%,7%,10%,12%,14% (v/v)) for 12 min and HgCl2 (0.01%,0.05%,0.10%,0.20%,0.25% (w/v)) for 2 min.A maximum survival rate of 70% was recorded after surface sterilization with 10% *** response was assessed on Murashige and Skoog (MS) medium fortified with assorted combinations of the cytokinins,benzylaminopurine (BAP),kinetin,and N6-(2-isopentyl)adenine (2iP).Treatment of BAP 1.5 mg/L combined with 2iP 9.0 mg/L and kinetin 1.5 mg/L was found to be optimum for shoot morphogenesis in terms of the number and subsequent growth of shoots,while the highest shoot length was yielded by the combination of BAP 0.5 mg/L,kinetin 0.5 mg/L,and 2iP 3 mg/*** levels of cytokinins induced callogenesis,vitrification and stunted growth to some *** rhizogenesis,uniform sized micro-shoots were excised and transferred to half-strength MS medium containing *** best rooting expression was observed with naphthaleneacetic acid (NAA) 1 mg/L combined with indole-3-butyric acid (IBA) 2 mg/L and paclobutrazol (PBZ) 1 mg/L.

关键词： Eriobotryajaponica Micropropagation Sterilization of Ioquat Plant growth regulator Shoot proliferation Rhizogenesis

Experimental Study on Heat Storage Properties Comparison of Paraffin/Metal Foams Phase Change Material Composites

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Journal of Thermal Science 2024年第2期33卷 469-478页

作者： Waqar ahmed Abid HUSSAIN Hanzla SHAHID Imran ALI hafiz Muhammad ALI Department of Mechanical Engineering University of Engineering and TechnologyTaxila47080Pakistan Department of Mechanical Engineering Institute of Space TechnologyIslamabadPakistan Department of Mechanical Mechatronics and Manufacturing EngineeringUniversity of Engineering and Technology LahoreFaisalabad CampusPunjabPakistan Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Renewable Energy and Power Systems(IRC-REPS) King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia

Heat storage properties of phase change materials(PCMs) are essential characteristics that perform a key role in thermal heat energy storage *** thermal properties of PCMs can be improved by developing metal foam/PCM *** addition of metal foam in PCMs has a significant effect on the thermal characteristics of *** this paper,the heat storage properties of two different metal foam/PCM composites were experimentally *** behavior of paraffin in metal foam(copper and iron-nickel)/paraffin composites concerning pure paraffin at a constant heat flux of 1000 W/m^(2) in three directions simultaneously(x,y,and z) was *** was infiltrated into copper and iron-nickel foams to develop composite materials which resulted in enhancing the thermal conductivity of the paraffin.A comparative analysis is made on the heat storage properties of paraffin in copper and iron-nickel foams/paraffin *** temperature distribution during the phase transition process is experimentally *** comparison indicates that temperature uniformity in copper foam/paraffin composite is better than in iron-nickel foam/paraffin composite and pure paraffin at the same heat *** results show that at heat flux of 1000 W/m^(2),the heat storage time for copper foam/paraffin composite is 20.63% of that of iron-nickel foam/paraffin composite.

关键词： heat storage capacity paraffin/metal foam composite temperature uniformity heat storage rate phase transition process

MXenes and heterostructures-based electrocatalysts for hydrogen evolution reaction:Recent developments and future outlook

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Journal of Energy Chemistry 2024年第5期92卷 176-206页

作者： Abdul Hanan hafiz Taimoor ahmed Awan Faiza Bibi Raja Rafidah Raja Sulaiman Wai Yin Wong Rashmi Walvekar Seema Singh Mohammad Khalid Sunway Centre for Electrochemical Energy and Sustainable Technology(SCEEST) School of Engineering and TechnologySunway UniversityNo.5 Jalan UniversitiBandar Sunway47500 Petaling JayaSelangorMalaysia Fuel Cell Institute Universiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Faculty of Innovation and Technology School of EngineeringChemical Engineering ProgrammeNo.1 Jalan Taylor’sTaylor’s University Malaysia47500 Subang JayaSelangorMalaysia Chitkara Centre for Research and Development Chitkara UniversityHimachal Pradesh 174103India School of Applied and Life Sciences Uttaranchal UniversityDehradunUttarakhand 248007India Manipal Institute of Technology Manipal Academy of Higher EducationManipal 576104KarnatakaIndia Centre of Research Impact and Outcome Chitkara UniversityPunjab 140401India

The increasing focus on electrocatalysis for sustainable hydrogen(H_(2))production has prompted significant interest in MXenes,a class of two-dimensional(2D)materials comprising metal carbides,carbonitrides,and *** materials exhibit intriguing chemical and physical properties,including excellent electrical conductivity and a large surface area,making them attractive candidates for the hydrogen evolution reaction(HER).This scientific review explores recent advancements in MXene-based electrocatalysts for HER *** discusses various compositions,functionalities,and explicit design principles while providing a comprehensive overview of synthesis methods,exceptional properties,and electro-catalytic approaches for H_(2) production via electrochemical ***,challenges and future prospects in designing MXenes-based electrocatalysts with enhanced kinetics are highlighted,emphasizing the potential of incorporating different metals to expand the scope of electrochemical *** review suggests possible efforts for developing advanced MXenes-based electrocatalysts,particularly for efficient H_(2) generation through electrochemical water-splitting reactions..

关键词： MXenes Electrocatalyst Water Splitting Hydrogen Generation Clean Energy

Laccase/caffeic acid-catalyzed crosslinking coupled with galactomannan alters the conformational structure of ovalbumin and alleviates Th2-mediated allergic asthma

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Food Science and Human Wellness 2024年第4期13卷 1962-1973页

作者： ishfaq ahmed Suidong Ouyang Shengquan Wu Haochang Song Miaoyuan Zhang Renxing Luo Peishan Lu Jiaqi Deng Tingting Zheng Yanyan Wang Xinguang Liu Gonghua Huang Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguan 523808China Haide College Ocean University of ChinaLaoshan CampusQingdao 266100China School of Medical Technology Guangdong Medical UniversityDongguan 523808China

Ovalbumin(OVA)is the major allergenic protein that can induce T helper 2(Th2)-allergic reactions,for which current treatment options are *** this study,we developed a polymerized hypoallergenic OVA product via laccase/caffeic acid(Lac/CA)-catalyzed crosslinking in conjunction with galactomannan(Man).The formation of high molecular weight crosslinked polymers and the Ig G-binding were analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE)and Western *** study indicated that Lac/CA-catalyzed crosslinking plus Man conjugation substantially altered secondary and tertiary structures of OVA along with the variation in surface *** digestion stability assay indicated that crosslinked OVA exhibited less resistance in simulated gastric fluid(SGF)and simulated intestinal fluid(SIF).Mouse model study indicated that Lac-Man/OVA ameliorated eosinophilic airway inflammatory response and efficiently downregulated the expression of Th2-related cytokines(interleukin(IL)-4,IL-5,and IL-13),and upregulated IFN-γand IL-10 *** of bone marrow-derived dendritic cells with Lac-Man/OVA suppressed the expression of phenotypic maturation markers(CD80 and CD86)and MHC class II molecules,and suppressed the expression levels of proinflammatory *** knowledge obtained in the present study offers an effective way to acquire a hypoallergenic OVA product that can have a therapeutic effect in alleviating OVA-induced allergic asthma.

关键词： Ovalbumin Laccase Galactomannan Conformational structure Asthma

The interplay mechanism between IDH mutation, MGMT-promoter methylation, and PRMT5 activity in the progression of grade 4 astrocytoma: unraveling the complex triad theory

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Oncology Research 2024年第6期32卷 1037-1045页

作者： MAHER KURDI ALAA ALKHOTANI ABDULRAHMAN SABBAGH EYAD FAIZO ahmed I.LARY ahmed K.BAMAGA MAJID ALMANSOURI BADR hafiz THAMER ALSHARIF SALEH BAEESA Department of Pathology Faculty of MedicineKing Abdulaziz UniversityRabighSaudi Arabia Department of Pathology College of MedicineUmm Al-Qura UniversityMakkahSaudi Arabia Department of Surgery Faculty of MedicineKing Abdulaziz UniversityJeddahSaudi Arabia Department of Surgery Faculty of MedicineUniversity of TabukTabukSaudi Arabia Section of Neurosurgery Department of SurgeryKing Abdulaziz Medical CityJeddahSaudi Arabia Department of Pediatrics Faculty of MedicineKing Abdulaziz UniversityJeddahSaudi Arabia Department of Clinical Biochemistry Faculty of MedicineKing Abdulaziz UniversityJeddahSaudi Arabia Department of Neurosciences King Faisal Specialist Hospital and Research CenterJeddahSaudi Arabia Department of Surgery King Abdulaziz Specialist HospitalTaifSaudi Arabia

Background:The dysregulation of Isocitrate dehydrogenase(IDH)and the subsequent production of 2-Hydroxyglutrate(2HG)may alter the expression of epigenetic proteins in Grade 4 *** interplay mechanism between IDH,O-6-methylguanine-DNA methyltransferase(MGMT)-promoter methylation,and protein methyltransferase proteins-5(PRMT5)activity,with tumor progression has never been ***:A retrospective cohort of 34 patients with G4 astrocytoma is classified into IDH-mutant and IDH-wildtype *** groups were tested for MGMT-promoter methylation and PRMT5 through methylation-specific and gene expression PCR ***-cohort statistical significance was ***:Both IDH-mutant WHO grade 4 astrocytomas(n=22,64.7%)and IDH-wildtype glioblastomas(n=12,35.3%)had upregulated PRMT5 gene expression except in one *** of the 22 IDH-mutant tumors,10(45.5%)tumors showed MGMT-promoter methylation and 12(54.5%)tumors had unmethylated *** IDH-wildtype tumors had unmethylated *** was a statistically significant relationship between MGMT-promoter methylation and IDH in G4 astrocytoma(p-value=0.006).Statistically significant differences in progression-free survival(PFS)were also observed among all G4 astrocytomas that expressed PRMT5 and received either temozolomide(TMZ)or TMZ plus other chemotherapies,regardless of their IDH or MGMT-methylation status(p-value=0.0014).Specifically,IDH-mutant tumors that had upregulated PRMT5 activity and MGMT-promoter methylation,who received only TMZ,have exhibited longer ***:The relationship between PRMT5,MGMT-promoter,and IDH is not ***,accumulation of D2-hydroxyglutarate(2-HG),which partially activates 2-OG-dependent deoxygenase,may not affect their *** IDH-wildtype glioblastomas,the 2HG-2OG pathway is typically inactive,leading to PRMT5 *** alone,compared to TMZ-plus,can increase PFS in upregulated PRMT5 ***,using a PRMT5 inhibitor in G4

关键词： Grade 4 astrocytoma Glioblastoma Isocitrate dehydrogenase(IDH) O-6-methylguanine-DNA methyltransferase(MGMT) Protein methyltransferase proteins-5(PRMT5) Progression-free survival(PFS)

Analysis of cerium substitution in Co-Sr based spinel ferrites for high frequency application

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Journal of Rare Earths 2024年第9期42卷 1755-1763,I0005页

作者： Laura Khudaysh Inas A.ahmed Syeda Rabia Ejaz Sajjad Ahmad Khan Yasir A.Haleem Mohamed M.Ibrahim Mahmood Ali hafiz Muhammad Tahir Farid Zeinhom M.El-Bahy Department of Physics Faculty of ScienceJazan UniversityJazan45142Saudi Arabia Department of Chemistry Faculty of ScienceKing Khalid UniversityAbha62224Saudi Arabia Department of Physics The Government Sadiq College Women UniversityBahawalpur63100Pakistan Institute of Physics Khwaja Fareed University of Engineering and Information TechnologyRahim Yar Khan64200Pakistan Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Centre of Excellence in Solid State Physics University of the PunjabLahorePakistan Department of Physics Government CollegeTaunsa Sharif32200Pakistan Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City11884CairoEgypt

Spinel ferrites exhibit exceptional magnetic properties,making them a distinctive class of magnetic *** sol-gel technique was utilized for the synthesis of spinel ferrites with the chemical formula Co_(0.6)Sr_(0.4)Ce_(x)Fe_(2-x)O_(4). Following that,a comprehensive X-ray diffraction analysis unveiled the crystalline cubic structure of the synthesized *** the utilization of the M-H loop approach,the ferromagnetic attributes of ferrites were assessed,and the assimilation of rare earth elements led to substantial enhancements in saturation magnetization,remanence,and *** ferrites with a high concentration of rare earth elements have improved direct current resistivity and activation *** logarithm of a material's resistance increased from 5.29 to 8.12 Ω·cm as cerium is *** a change in the amount of cerium,the activation energy goes up from 0.19 to *** changing the frequency from 5.5 to 9.5 GHz,the dielectric characteristics were *** the frequency goes up,the dielectric constant goes *** ferrites that have been made better in every way can be used in high-frequency applications.

关键词： Activation energy DC electrical resistance Remanence magnetization Cobalt strontium spinel ferrites High frequency application Rare earths

Evaluating the Potential of Nitrofurantoin and Fosfomycin for *** UTIs: A Susceptibility Study

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Journal of Clinical and Nursing Research 2024年第6期8卷 351-358页

作者： Usama ahmed Muhammad Zubair Baqaur Rehman hafiz Muhammad Sultan Department of Medicine School of Biomedical EngineeringShenzhen University Medical SchoolShenzhen 518060China Institute of Biological Sciences Khwaja Fareed University of Engineering and Information TechnologyRahim Yar KhanPakistan Department of Biosciences COMSATS University IslamabadPark RdIslamabad Capital Territory 45550Pakistan Crop Diseases Research Institute(CDRI) National Agricultural Research Centre NARCIslamabadPakistan

This study was designed to find the susceptibility of Nitrofurantoin and Fosfomycin among urinary isolates of *** hundred(400)urine samples were collected for susceptibility of nitrofurantoin and fosfomycin among urinary isolates of *** indoor and outdoor patients'urinary samples yielded growth of ***-stream urine specimens were inoculated on blood agar and CLED agar and incubated at 35±2°*** was observed,and Escherichia coli was identified by Gram staining,Catalase,Motility test and API 20E(Bio murex)as per standard *** susceptibility testing of isolates for nitrofurantoin and fosfomycin was carried out by the modified Kirby-Bauer disc diffusion method according to CLSI guidelines ATCC *** was used as a quality control strain.A total of 400 samples were tested susceptibility of nitrofurantoin and fosfomycin among urinary isolates of *** during this period.A total of 400 samples yielded the growth of ***,out of which 178(44.5%)were male and 222(55.5%)were female *** males,18(10%)were tolerant to nitrofurantoin,and 2(1.1%)were tolerant to *** females,9(4.09%)were susceptible to nitrofurantoin while 6(2.72%)were susceptible to *** age groups below 45 years old,6(4.76%)were tolerant to nitrofurantoin,and 2(1.58%)were sensitive to *** 46-66 years old,4(2.81%)were sensitive to nitrofurantoin,and 3(2.11%)were sensitive to *** 67-90 years old,17(12.87%)were sensitive to nitrofurantoin,and 4(3.03%)were tolerant to *** and nitrofurantoin showed good susceptibility in urinary isolates of *** and can be used empirically in our setup.

关键词： E.coli Fosfomycin Nitrofurantoin Susceptibility Urinary isolates

Growth,yield and water productivity of dry direct seeded rice and transplanted aromatic rice under different irrigation management regimes

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Journal of Integrative Agriculture 2020年第11期19卷 2656-2673页

作者： Muhammad ishfaq Nadeem Akbar Shakeel ahmed Anjum Muhammad Anwar-Ul-haq Department of Agronomy University of AgricultureFaisalabad 38040Pakistan Department of Plant Science University of CaliforniaCalifornia 95616-8780USA Institute of Soil and Environmental Sciences University of AgricultureFaisalabad 38040Pakistan

Sustainability of traditionally cultivated rice in the rice-wheat cropping zone(RWCZ)of Pakistan is dwindling due to the high cost of production,declining water resources and escalating labour ***,farmers and researchers are compelled to find promising alternatives to traditional transplanted rice(TPR).A field study was conducted in Punjab,Pakistan,in 2017 and 2018 to explore the trade-offs between water saving and paddy yield,water productivity and economics of two aromatic rice varieties under dry direct seeded rice(DDSR)and *** experiment was comprised of three irrigation regimes on the basis of soil moisture tension(SMT)viz.,continuous flooded(>–10 kPa SMT),alternate wetting and drying(AWD)(–20 kPa SMT)and aerobic rice(–40 kPa SMT),maintained under TPR and DDSR *** aromatic rice verities:Basmati-515 and Chenab Basmati-2016 were used during both years of *** both years,DDSR produced higher yields(13–18%)and reduced the total water inputs(8–12%)in comparison to *** comparison to traditional continuous flooded(CF),AWD under DDSR reduced total water input by 27–29%and improved the leaf area index(LAI),tillering,yield(7–9%),and water productivity(44–50%).The performance of AWD with regard to water savings and increased productivity was much higher in DDSR system as compared to AWD in TPR *** of DDSR with aerobic irrigation improved water savings(49–55%)and water productivity(22–30%)at the expense of paddy yield reduction(36–39%)and spikelet *** regard to variety,the highest paddy yield(6.6 and 6.7 t ha–1)was recorded in DDSR using Chenab Basmati-2016 under AWD irrigation threshold that attributed to high tiller density and *** economic analysis showed DDSR as more beneficial rice establishment method than TPR with a high benefit-cost ratio(BCR)when the crop was irrigated with AWD irrigation *** results highlighted that with the use of short duration varieties,DDSR cultivation in conjunction wit

关键词： rice establishment aerobic alternate wetting and drying water input tillering yield

Techno-Economic Analysis of a Grid-Connected Waste to Energy Gasification Plant:A Case Study

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Energy Engineering 2021年第6期118卷 1681-1701页

作者： ahmed Abubakar Elwan Mohammed hafiz Habibuddin Department of Electrical Power Engineering Universiti Teknologi MalaysiaJohor Bahru81310Malaysia

With population growth around the world,municipal waste disposal and continued energy demand becomes some of the major challenges to deal *** order to address these,an approach is required for an optimal waste management system that offers the population benefit with a lower environmental *** study evaluates the technical-economic and environmental impact analysis of a grid-connected waste to energy(WtE)plant to power a Univerisiti Teknologi Malaysia(UTM)*** energy recovery potential of the waste stream was assessed using the life cycle assessment(LCA)method with GaBi^(TM) software(version 4).A technical,economic and environmental analysis was then carried out for the grid-connected WtE system using HOMERPro software with gasification conversion *** cash flow analysis was based on levelized costs of energy(LCOE)and total net present value(NPV).The results gave an NPV for the system at USD 1.11×10^(7),with most of the effects resulting from the grid operating costs and the LCOE of USD 0.43/kWh compared to the grid unit price of USD 0.7/kWh which corresponds to a saving of$0.27/kWh in energy *** an environmental point of view,the results showed a significant reduction in carbon dioxide emissions from around 2,000 tons per year to around 400 tons per *** regard to the amount of waste sent to landfills,the results show a significant improvement from 142,605.5 kg/year to 0.13 kg/year.

关键词： Waste to energy techno-economic analysis solid waste gasification

A Progressive Approach to Generic Object Detection: A Two-Stage Framework for Image Recognition

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Computers, Materials & Continua 2023年第6期75卷 6351-6373页

作者： Muhammad Aamir Ziaur Rahman Waheed ahmed Abro Uzair Aslam Bhatti Zaheer ahmed Dayo Muhammad ishfaq College of Computer Science Huanggang Normal UniversityHuanggangHubei438000China FAST School of Computing National University of Computer&Emerging Science(NUCES)Karachi CampusKarachi75030Pakistan School of Information and Communication Engineering Hainan UniversityHaikou68000China

Object detection in images has been identified as a critical area of research in computer vision image *** has developed several novel methods for determining an object’s location and category from an ***,there is still room for improvement in terms of detection *** study aims to develop a technique for detecting objects in *** enhance overall detection performance,we considered object detection a two-fold problem,including localization and *** proposed method generates class-independent,high-quality,and precise proposals using an agglomerative clustering *** then combine these proposals with the relevant input image to train our network on convolutional ***,a network refinement module decreases the quantity of generated proposals to produce fewer high-quality candidate ***,revised candidate proposals are sent into the network’s detection process to determine the object *** algorithm’s performance is evaluated using publicly available the PASCAL Visual Object Classes Challenge 2007(VOC2007),VOC2012,and Microsoft Common Objects in Context(MS-COCO)*** only 100 proposals per image at intersection over union((IoU)=0.5 and 0.7),the proposed method attains Detection Recall(DR)rates of(93.17%and 79.35%)and(69.4%and 58.35%),and Mean Average Best Overlap(MABO)values of(79.25%and 62.65%),for the VOC2007 and MS-COCO datasets,***,it achieves a Mean Average Precision(mAP)of(84.7%and 81.5%)on both VOC *** experiment findings reveal that our method exceeds previous approaches in terms of overall detection performance,proving its effectiveness.

关键词： Deep neural network deep learning features agglomerative clustering localizations refinement region of interest(ROI) object detection