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Highly efficient one-pot synthesis of dihydropyran heterocycles

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Chinese Chemical Letters 2014年第2期25卷 212-214页

作者： Mohamed A.Ameen Sara M.Motamed Fathy F.Abdel-latif Chemistry Department.Faculty of Science El Minia University

Diammonium hydrogen phosphate and potassium carbonate-catalyzed one-pot synthesis of 1,4- phenylene-bis（2-amino-4H-pyran-3-carbonitrile and 2-amino-4-aryl-4H-pyran-3-carbonitrile deriva- tives has been achieved by a three-component cyclocondensation of aldehydes, malononitrile, and different nucleophiles in aqueous medium in high yields.

关键词： One pot synthesis Diammonium hydrogen phosphate Pyran Aqueous media

Ecological fitness of brown planthopper, Nilaparvata lugens (Stål), to rice nutrient management

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Ecological Processes 2017年第1期6卷 149-158页

作者： Md.Mamunur Rashid Mahbuba Jahan Khandakar S.Islam Md.Abdul latif Plant Physiology Division Bangladesh Rice Research Institute(BRRI)Gazipur 1701Bangladesh Department of Entomology Bangladesh Agricultural UniversityMymensingh 2202Bangladesh Plant Pathology Division Bangladesh Rice Research Institute(BRRI)Gazipur 1701Bangladesh

Introduction:The brown planthopper(BPH),Nilaparvata lugens(Stål)(Hemiptera:Delphacidae),is a notorious insect pest of *** supplementation can alter plant biochemical compositions which may indirectly affect on ecological fitness parameters of its insect ***,few findings are available on nutrient-induced ecological fitness of BPH and relationship of BPH fitness parameters with its host rice plant biochemical ***:We studied the main and interaction effects of nitrogen(N),phosphorus(P),and potassium(K)inputs on BPH fitness,as measured by the following variables:nymph survival,nymphal duration,adult body weight,and its *** planthopper fitness parameters were regressed as function of rice plant(Oryza sativa)biochemical composition.A completely randomized design with four replications in a factorial scheme was used considering N,P,and K levels as ***:Nitrogen application to the host rice plants provided greater survival and enhanced body weight of *** nymphal duration was found to decrease with N subsidy that caused shorter generation time of *** compounds N and soluble protein(SP),total free sugar(TFS),and silicon(Si)content in rice plant tissue correlated strongly with all fitness traits of ***,SP,and TFS associated positively with BPH survival and body weight,while negatively with nymphal *** contrast,Si had negative correlation with BPH survival and body weight,but positive with nymphal *** supplementation to host plant contributed to increase BPH body *** of P with all parameters of BPH were weak except body weight which was highly significant and *** between N and P inputs demonstrated significant effect on BPH body *** of K had no significant effect on BPH survival and *** analysis did not detect significant relationship of BPH fitness parameters with plant tissue content of ***:The res

关键词： Nilaparvata lugens Nutrient management Survival Nymphal duration Body weight

The impact of simulated gastrointestinal digestion on the bioaccessibility and antioxidant activity of purple rice phenolic compounds

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Food Bioscience 2022年第3期47卷 881-888页

作者： Borkwei Ed Nignpense Sajid latif Nidhish Francis Christopher Blanchard Abishek Bommannan Santhakumar School of Dentistry and Medical Sciences Charles Sturt UniversityLocked Bag 588Wagga WaggaNSW 2678Australia National Life Sciences Research Hub Charles Sturt UniversityWagga WaggaNSW 2795Australia School of Agricultural Environment and Veterinary SciencesCharles Sturt UniversityWagga WaggaNSW 2650Australia Gulbali Institute Charles Sturt UniversityWagga WaggaNSW 2650Australia Australian Research Council (ARC) Industrial Transformation Training Centre (ITTC) for Functional GrainsGraham Centre for Agricultural InnovationCharles Sturt UniversityWagga WaggaNSW 2650Australia

Polyphenol-rich purple rice has been shown to exhibit a wide range of health properties including antioxidant *** study aimed to determine the impact that gastrointestinal digestion of purple rice had on its phenolic bioaccessibility and antioxidant *** results demonstrated a significant difference(p<0.01)in bioaccessible phenolic content level and antioxidant activity between simulated gastric and intestinal ***,mass spectrometry and ultra-high-performance liquid chromatography(UHPLC)coupled with online ABTS•+scavenging activity demonstrated a significant loss in the number of polyphenols that were bioaccessible after ***,substantial free radical scavenging activity was retained after digestion due to the bioaccessibility of bioactive compounds such as tryptophan and protocatechuic ***,purple rice may be considered as a source of bioaccessible phenolic and antioxidant compounds.

关键词： Antioxidant Bioaccessibility Gastrointestinal digestion Polyphenols Purple rice

Efficient and Cost-Effective Vehicle Detection in Foggy Weather for Edge/Fog-Enabled Traffic Surveillance and Collision Avoidance Systems

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Computers, Materials & Continua 2024年第10期81卷 911-931页

作者： Naeem Raza Muhammad Asif Habib Mudassar Ahmad Qaisar Abbas Mutlaq BAldajani Muhammad Ahsan latif Department of Computer Science National Textile UniversityFaisalabad37610Pakistan College of Computer and Information Sciences Imam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11432Saudi Arabia Department of Computer Science University of AgricultureFaisalabad38000Pakistan

Vision-based vehicle detection in adverse weather conditions such as fog,haze,and mist is a challenging research area in the fields of autonomous vehicles,collision avoidance,and Internet of Things(IoT)-enabled edge/fog computing traffic surveillance and monitoring *** and cost-effective vehicle detection at high accuracy and speed in foggy weather is essential to avoiding road traffic collisions in *** evaluate vision-based vehicle detection performance in foggy weather conditions,state-of-the-art Vehicle Detection in Adverse Weather Nature(DAWN)and Foggy Driving(FD)datasets are self-annotated using the YOLO LABEL tool and customized to four vehicle detection classes:cars,buses,motorcycles,and *** state-of-the-art single-stage deep learning algorithms YOLO-V5,and YOLO-V8 are considered for the task of vehicle ***,YOLO-V5s is enhanced by introducing attention modules Convolutional Block Attention Module(CBAM),Normalized-based Attention Module(NAM),and Simple Attention Module(SimAM)after the SPPF module as well as YOLO-V5l with *** vehicle detection accuracy parameters and running speed is validated on cloud(Google Colab)and edge(local)*** mAP50 score of YOLO-V5n is 72.60%,YOLOV5s is 75.20%,YOLO-V5m is 73.40%,and YOLO-V5l is 77.30%;and YOLO-V8n is 60.20%,YOLO-V8s is 73.50%,YOLO-V8m is 73.80%,and YOLO-V8l is 72.60%on DAWN *** mAP50 score of YOLO-V5n is 43.90%,YOLO-V5s is 40.10%,YOLO-V5m is 49.70%,and YOLO-V5l is 57.30%;and YOLO-V8n is 41.60%,YOLO-V8s is 46.90%,YOLO-V8m is 42.90%,and YOLO-V8l is 44.80%on FD *** vehicle detection speed of YOLOV5n is 59 Frame Per Seconds(FPS),YOLO-V5s is 47 FPS,YOLO-V5m is 38 FPS,and YOLO-V5l is 30 FPS;and YOLO-V8n is 185 FPS,YOLO-V8s is 109 FPS,YOLO-V8m is 72 FPS,and YOLO-V8l is 63 FPS on DAWN *** vehicle detection speed of YOLO-V5n is 26 FPS,YOLO-V5s is 24 FPS,YOLO-V5m is 22 FPS,and YOLO-V5l is 17 FPS;and YOLO-V8n is 313 FPS,YOLO-V8s is 182 FPS,YOLO

关键词： Vehicle detection YOLO-V5 YOLO-V5s variants YOLO-V8 DAWN dataset foggy driving dataset IoT cloud/edge/fog computing

In silico designing and optimization of anti-epidermal growth factor receptor scaffolds by complementary-determining regions-grafting technique

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Quantitative Biology 2024年第3期12卷 301-312页

作者： Razieh Rezaei Adriani Seyed latif Mousavi Gargari Hamid Bakherad Jafar Amani Department of Biology Shahed UniversityTehranIran Department of Pharmaceutical Biotechnology School of Pharmacy and Pharmaceutical SciencesIsfahan University of Medical SciencesIsfahanIran Applied Microbiology Research Center System Biologyand Poisonings InstituteBaqiyatallah University of Medical SciencesTehranIran

Monoclonal antibodies are attractive therapeutic agents in a wide range of human disorders that bind specifically to their target through their complementary-determining regions(CDRs).Small proteins with structurally preserved CDRs are promising antibodies *** this in silico study,we presented new antibody mimetics against the cancer marker epidermal growth factor receptor(EGFR)created by the CDRs grafting *** potential graft acceptor sites that efficiently immobilize the grafted CDR loops were selected from three small protein scaffolds using a *** three most involved CDR loops in antibody-receptor interactions extracted from panitumumab antibody against the EGFR domain III crystal structure were then grafted to the selected scaffolds through the loop randomization *** combination of three CDR loops and 10 grafting sites revealed that three of the 36 combinations showed specific binding to EGFR DIII by binding energy ***,the present strategy and selected small protein scaffolds are promising tools in the design of new binders against EGFR with high binding energy.

关键词： CDR grafting technique EGFR molecular dynamic simulation panitumumab

Genetic Characterization of Indigenous Rice Varieties in Eastern Himalayan Region of Northeast India

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Rice science 2014年第2期21卷 90-98页

作者： Baharul Islam CHOUDHURY Mohammed latif KHAN Selvadurai DAYANANDAN Forest and Evolutionary Genomics Laboratory and Centre for Structural and Functional GenomicsBiology DepartmentConcordia University Québec Centre for Biodiversity Sciences 1205 Dr.Penfield Avenue MontréalQC Department of Forestry North Eastern Regional Institute of Science & Technology Department of Botany Dr.Harisingh Gour Central University

The eastern Himalayan region of Northeast （NE） India is home to a large number of indigenous rice varieties, which are traditionally classified as Oryza sativa subspecies indica, japonica or intermediate types. The classification based on traditional Cheng’s index is often inconclusive due to phenotypic plasticity of morphological characters, which are influenced by environmental conditions. We used molecular markers specific for indica and japonica subspecies to assess the degree of genetic relatedness of indigenous rice varieties in NE India. The results revealed that majority of upland （jum） and glutinous rice varieties, traditionally considered as japonica, were genetically close to the subspecies indica. All varieties of boro ecotype were found to be indica type, and only a few varieties cultivated in lowland and upland areas were japonica type. Some of the lowland varieties of the sali ecotype were intermediate between indica and japonica, and they showed a closer genetic affinity to O. rufipogon.

关键词： classification genetic characterization insertion and deletion marker indica japonica O. sativa

Review on global change status and its impacts on the Tibetan Plateau environment

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Journal of Plant Ecology 2019年第6期12卷 917-930页

作者： Aamir latif Sana Ilyas Yangjian Zhang Yuqin Xin Lin Zhou Quan Zhou Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsBeijing 100029China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China Sanmenxia Academy of Environmental Sciences Sanmenxia 472000China Southwest Branch of State Grid Corporation of China Chengdu 610094China

The Tibetan Plateau(TP)holds fundamental ecological and environmental significances to China and *** TP also lies in the core zone of the belt and road *** protect the TP environment,a comprehensive screening on current ecological research status is *** teased out research gap can also be utilized as guidelines for the recently launched major research programs,*** second TP scientific expedition and silk and belt road research *** findings showed that the TP has experienced significant temperature increase at a rate of 0.2℃ per decade since *** most robust warming trend was found in the northern *** also exhibited an increasing trend but with high spatial *** climates have caused a series of environmental consequences,including lake area changes,glacier shrinkage,permafrost degradation and exacerbated *** rising temperature is the main reason behind the glaciers shrinkage,snow melting,permafrost degradation and lake area changes on the TP and neighboring *** projected loss of glacial area on the plateau is estimated to be around 43%by 2070 and 75%by the end of the *** was responsive to the changed environments,varied climates and intensified human activities by changing phenology and *** global change study should be more oriented toward integrating various research methods and tools,and synthesizing diverse subjects of water,vegetation,atmosphere and soil.

关键词： Tibetan Plateau silk and belt road climate change human activities environmental consequences

Optimizing the Preparation Parameters of Nanocrystalline Zirconia for Catalytic Applications

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Acta Metallurgica Sinica(English Letters) 2013年第5期26卷 565-573页

作者： M.M.Abd El-latif M.S.Showman A.M.Ibrahim M.M.Soliman Fabrication Technology Department Advanced Technology and New Materials Research Institute(ATNMRI) City of Scientific Research and Technological Applications (SRTA-City) Dharyya Colleges for Science and Atrs Qassim University Surface Chemistry and Catalysis Laboratory Physical Chemistry Department National Research Center Department of Materials Science Institute of Graduate Studies and Research Alexandria University

Nanocrystalline zirconia powder with high surface area and high tetragonal phase percentage is prepared by the precipitation method using ammonium hydroxide as a precipitating agent. The pH of precipitation, preparation temperature and calcinations＇ temperature are *** size, specific surface area, tetragonal phase percentage and the thermal stability of the prepared samples are identified by diferent characterization tools such as X-ray difraction（XRD）, thermo gravimetric analysis（TGA）, diferential scanning calorimetry（DSC）, BET surface area, scanning electron microscopy（SEM） and transmission electron microscopy（TEM）. The optimum preparation parameters for obtaining nanocrystalline zirconia with high percentage of tetragonal phase and high surface area are pH 9, preparation temperature of 80℃ and calcinations＇ temperature of 400℃. The sample prepared under optimized conditions showed a high specific surface area of 179.2 m2/g, high tetragonal phase percentage of 81% and high catalytic activity（60%） for synthesis of butyl acetate ester.

关键词： Tetragonal zirconia Nanocrystalline zirconia Precipitation synthesis Catalytic properties of zirconia Esterification with zirconia

Allocation and sizing of reactive power compensators considering PV power and load demand uncertainty using beetle-antenna grey wolf optimization

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Clean Energy 2023年第2期7卷 350-362页

作者： Rasha Elazab M.Ser-Alkhatm Maged A.Abu Adma K.M.Abdel-latif Department of Electrical Power and Machines Engineering Faculty of EngineeringHelwan UniversityCairoEgypt

Distributed photovoltaic(PV)systems play an important role in supplying many recent *** absence of reactive power support for these small-scale PV plants increases total microgrid losses and voltage-instability *** power compensations(RPCs)should be integrated to enhance both microgrid losses and voltage *** planning is a non-linear,complicated *** this paper,a combined RPC allocation and sizing algorithm is *** RPC-integrating buses are selected using a new adaptive approach of loss sensitivity *** the sizing process,the uncertainties in PV power and load demand are modelled using proper probability density *** simulation techniques for handling uncertainties are compared to define the accurate and fast accurate method as follows:Monte Carlo simulation(MCS),scenario tree construction and reduction method,and point estimation method(PEM).The load flow equations are solved using the forward-backward sweep *** are optimally sized using the beetle-antenna-based strategy with grey wolf optimization(BGWO)to overcome the local minima problem that appeared in the other pre-proposed *** have been compared using particle swarm optimization and conventional *** proposed model is verified using the IEEE 33 radial bus *** expected power loss has been reduced by 22% and 31% using compensation of 26% and 44%,*** results obtained prove that the BGWO optimal power flow and PEM to handle the uncertainty can significantly reduce the computation time with sufficient *** the study conditions,PEM reduces the computation time to 4 minutes compared with 4 hours for MCS,with only a 3% error compared with MCS as an uncertainty benchmark method.

关键词： distributed PV plants reactive power compensator sizing PV uncertainty beetle-antenna grey wolf optimization