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PM_(2.5)characterization of primary and secondary organic aerosols in two urban-industrial areas in the East Mediterranean

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Journal of Environmental Sciences 2021年第3期33卷 98-116页

作者： Marc Fadel Frédéric Ledoux Mariana farhat Adib Kfoury Dominique Courcot Charbel Afif Emissions Measurementsand Modeling of the Atmosphere(EMMA)LaboratoryCARFaculty of SciencesSaint Joseph UniversityBeirutLebanon Unitéde Chimie Environnementale et Interactions sur le Vivant UCEIV UR4492FR CNRS 3417University of Littoral Côte d Opale(ULCO)DunkerqueFrance Department of Environmental Sciences University of BalamandAl KourahLebanon Climate and Atmosphere Research Center The Cyprus InstituteNicosiaCyprus

Primary and secondary organic aerosols in PM_(2.5)were investigated over a one-year campaign at Zouk Mikael and Fiaa,*** n-alkanes concentrations were quite similar at both sites(26-29 ng/m^(3))and mainly explained by anthropogenic emissions rather than natural *** concentrations of total Polycyclic Aromatic Hydrocarbons(PAHs)were nearly three times higher at Zouk Mikael(2.56 ng/m^(3))compared to Fiaa(0.95 ng/m^(3)),especially for indeno[1,2,3-c,d]pyrene linked to the presence of the power plant.A characteristic indeno[1,2,3-c,d]pyrene/(indeno[1,2,3-c,d]pyrene+benzo[g,h,i]perylene)ratio in the range0.8-1.0 was determined for heavy fuel oil combustion from the power *** acids and hopanes were also investigated and were assigned to cooking activities and vehicular emissions *** were identified for the first time in Lebanon with high concentrations at Zouk and Fiaa(106.88 and 97.68 ng/m^(3) respectively).Moreover,the biogenic secondary aerosols revealed higher concentrations in *** total terpene concentration varied between 131 ng/m^(3) at Zouk Mikael in winter to 469 ng/m3 at Fiaa in ***,the concentrations of the dicarboxylic acids especially for adipic and phthalic acids were more influenced by anthropogenic *** analysis of molecular markers and diagnostic ratios indicated that the sites were strongly affected by anthropogenic sources such as waste open burning,diesel private generators,cooking activities,road transport,power plant,and industrial ***,results showed different pattern during winter and summer ***,higher concentrations of biogenic markers were clearly encountered during the summer period.

关键词： PM_(2.5) Secondary organic aerosols PAHs Phthalates Lebanon Urban-industrial sites

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Insight into crystal growth and upconversion luminescence property of tetragonal Ba_(3)Sc_(2)F_(12) nanocrystals

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Rare Metals 2021年第1期40卷 113-122页

作者： Juan Xie Guang-Chao Zheng Yang-Ming Hu farhat Nosheen Zhi-Cheng Zhang Er-Jun Liang School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Division of Science and Technology Department of ChemistryUniversity of EducationLahore 54770Pakistan Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University and Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China

Sc-based nanomaterials have attracted considerable attention due to their unique optical properties different from those of Ln/Y-based ***,studies on Sc-based nanomaterials are far from ***,nanoscale alkaline(Ca,Sr and Ba)scandium fluorides were almost ignored for their stringent synthetic ***,we synthesize high-quality tetragonal phase Ba_(3)Sc_(2)F_(12) nanocrystals with uniform morphology and good dispersibility by carefully tailoring the reaction conditions,such as the molar ratio of reactants,temperature and reaction ***,the upconversion(UC)luminescence property of Ba_(3)Sc_(2)F_(12):Yb/Er(Ho)samples is investigated in *** doping concentrations of sensitizer(Yb^(3+))and activator(Er^(3+)and Ho^(3+))are optimized for the strongest UC luminescence,of which the corresponding energy transfer processes are also ***,tetragonal Ba_(3)Sc_(2)F_(12) nanocrystals can gradually transform into hexagonal Ba_(4)Yb_(3)F_(17) nanocrystals with the increase in Yb^(3+)doping *** work provides a novel type of Sc-based nanomaterials with strong red UC emissions which are promising in high-resolution 3-dimensional color displays,laser,bioimaging and biolabels.

关键词： Ba_(3)Sc_(2)F_(12)nanocrystals Crystal growth Upconversion Sc-based nanomaterials

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Carotid endarterectomies for relieving severe or moderate carotid stenosis

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Chinese Medical Journal 2004年第6期117卷 956-958页

作者：吕志前萧明第 Montagna Pietro farhat Fadi Olivier Jegaden Department of Cardiovascular Surgery Shanghai First People's Hospital Department of Cardiovascular Surgery Lyon Cardiac Hospital

Carotid artery stenosis is one of the major causes of ischemic strokes.1 To prevent or reduce the occurrences of ischemic strokes, carotid endarterectomies (CEAs) were performed on 48 patients with carotid artery sten... 详细信息

关键词： carotid stenosis·endarterectomy carotid

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Laser back scatter: Limitation to higher repetition rate [kHz] Satellite Laser Ranging system

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Geodesy and Geodynamics 2021年第1期12卷 48-53页

作者： farhat Iqbal G.Kirchner F.Koidl Erich Leitgeb Department of Physics University of SargodhaPakistan Space Research Institute Head of Department Satellite GeodesyAustrian Academy of SciencesLustbuehelstrasse 46A-8042GrazAustria Space Research Institute Engineer at Department Planetary GeodesyAustrian Academy of Sciences HpLustbuehelstrasse 46A-8042GrazAustria Institut für Hochfrequenztechnik Institute of Microwave and Photonic EngineeringGraz University of TechnologyA-8010GrazInffeldgasse 12Austria

Satellite laser ranging(SLR)with higher repetition rate is the recent trend for its various *** backscatter(coincidence between recently transmitted pulses and received pulses near the detector)is found to be a constraint for the repetition rates higher than 20 kHz,due to,overlapping with photons returning from a satellite with the present constellation of most of the SLR *** an overlap occurs at every 75 km satellite distance change at 2 kHz repetition rate,and remains for about 7.5 km;for a 20 kHz system however,it will occur after every 7.5 km and remains for 7.5 km,resulting in constant backscatter overlap e leaving no chance to avoid *** resulting noise is 5 times more than before causing a serious problem in detection and lowers the signal to noise ratio of the overall SLR ***,decreasing energy per shot at higher repetition rates e assuming a constant power laser e the resulting backscatter may decrease fractionally.

关键词： Satellite laser ranging Higher repetition rate Noise Retro reflectors

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Understanding the dehydrogenation mechanism over iron nanoparticles catalysts based on density functional theory

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Chinese Chemical Letters 2021年第1期32卷 286-290页

作者： Wenjuan Yang Yating Zhu Junjun Li Zheng Chen farhat Nosheen Qitao Zhang Zhicheng Zhang SZU-NUS Collaborative Innovation Center for Optoelectronic Science£/Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China Hanshan Normal University Chaozhou 521041China Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Key Laboratory of Molecule-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241000China Department of Chemistry Division of Science&TechnologyUniversity of EducationLahorePakistan

The conversion of chemical feedstock materials into high value-added products accompanied with dehydrogenation is of great value in the chemical ***,the catalytic dehydrogenation reaction is inhibited by a limited number of expensive noble metal catalysts and lacks understanding of dehydrogenation ***,we report the use of heterogeneous non-noble metal iron nanoparticles(NPs) incorporated mesoporous nitrogen-doped carbon to investigate the dehydrogenation mechanism based on experiment observation and density functional theory(DFT) *** NPs catalyst displays excellent performance in the dehydrogenation of 1,2,3,4-tetrahydroquinoline(THQ)with 100% selectivity and 100% conversion for 10-12 h at room *** calculated adsorption energy implies that THQ prefers to adsorb on Fe NPs as compared with absence of Fe *** is more,the energy barrier of transition state is relatively low,illustrating the dehydrogenation is *** work provides an atomic scale mechanism guidance for the catalytic dehydrogenation reaction and points out the direction for the design of new catalysts.

关键词： Dehydrogenation mechanism Fe nanoparticles Density functional theory Transition states 1,2,3,4-Tetrahydroquinoline Theoretical calculations

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Bioactivity analysis of the Ta(Ⅴ) doped SiO2–Ca O–Na2O–P2O5 ceramics prepared by solid state sintering method

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Progress in Natural Science:Materials International 2016年第1期26卷 41-48页

作者： Rehana Zia Madeeha Riaz Nida ul nasir farhat Saleemi Zora Kayani Safia Anjum Farooq Bashir Tousif Hussain Department of Physics Lahore College for Women University 2. Government College for Women University 3. CASP Government College

The main objective of the study was to control the degradation rate of material at a higher degradation rate improving the chemical stability of the material. Ta is known to have good chemical resistance, biocompatibility and show no adverse biological response. In the present study, Si O–NaO–Ca O–PObioceramics with different TaOcontents was prepared by solid state sintering method at 1000 °C. The as-sintered ceramics were subjected to immersion studies in stimulated body fluid(SBF) for 21 days under static condition and characterized by XRD, FTIR, SEM, and AAS. The findings of the research indicate that the addition of TaOcontrolled degradability, and all samples showed sufficient bioactivity.

关键词： Crystallization Bioactivity Ta2O5 Degradation rate Bioceramic

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Epidermal growth factor receptor rs17337023 polymorphism in hypertensive gestational diabetic women: A pilot study

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World Journal of Diabetes 2019年第7期10卷 396-402页

作者： Russell S Martins Taimur Ahmed Sabah farhat Sana Shahid Syeda Sadia Fatima Medical College Aga Khan UniversityKarachiSindh 74800Pakistan Department of Biological and Biomedical Sciences Aga Khan UniversityKarachiSindh 74800Pakistan Department of Physiology Sir Syed Medical College for GirlsKarachiPakistan

BACKGROUND Women with gestational diabetes mellitus have an increased risk of developing gestational hypertension,which can increase fetal and neonatal morbidity and *** the past decade,single nucleotide polymorphisms in several genes have been identified as risk factors for development of gestational *** epidermal growth factor receptor activates tyrosine kinase mediated blood vessels contractility;and inflammatory *** in these mechanism are known to contribute towards *** is thus plausible that polymorphisms in the epidermal growth factor receptor gene would be associated with the development of hypertension in women with gestational *** To determine whether the epidermal growth factor receptor rs17337023 SNP is associated with the occurrence of hypertension in gestational diabetic *** This pilot case-control study was conducted at two tertiary care hospitals in Karachi,from January 2017-August *** hundred and two women at 28 week of gestation with gestational diabetes were recruited and classified into normotensive(n=80)and hypertensive(n=122)*** blood samples were genotyped for epidermal growth factor receptor polymorphism rs17337023 using tetra-ARMS polymerase chain *** analysis was applied on baseline *** data was analyzed for genotype and allele frequency determination using chi-squared *** all cases,a P value of0.05).Body fat percentage was significantly higher in hypertensive females as compared to normotensive subjects(35.138±4.29 Case vs 25.01±8.28 Control;P<0.05).Similarly,systolic and diastolic blood pressures among groups were significantly higher in hypertensive group than the normotensive group(P<0.05).Overall epidermal growth factor receptor rs17337023 polymorphism genotype frequen

关键词： Gestational diabetes mellitus Gestational hypertension Epidermal growth factor receptor rs17337023 Single nucleotide polymorphism Polymorphism Casecontrol

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Three-dimensional hierarchical Pt-Cu superstructures

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Nano Research 2015年第3期8卷 832-838页

作者： farhat Nosheen Zhicheng Zhang Guolei Xiang Biao Xu Yong Yang Faisal Saleem Xiaobin Xu Jingchao Zhang Xun Wang Department of Chemistry Tsinghua University Beijing 100084 China

三维(3D ) 层次 Pt-Cu 四角形，高度分叉，并且树枝状的上层建筑被一条灵巧的没有模板的热水的途径综合了，出现生长模式沿着(111， 110 ) ，(111 ) ，并且(100 ) 飞机分别地。这些结构被传播电子显微镜学( TEM )描绘了，X光检查衍射( X... 详细信息

三维(3D ) 层次 Pt-Cu 四角形，高度分叉，并且树枝状的上层建筑被一条灵巧的没有模板的热水的途径综合了，出现生长模式沿着(111， 110 ) ，(111 ) ，并且(100 ) 飞机分别地。这些结构被传播电子显微镜学( TEM )描绘了，X光检查衍射( XRD )，精力散X光检查光谱学( EDX )，诱导地联合的血浆光排放 spectrometry ( ICP-OES )和详细形成机制被开发了，它证明在里面形成的 situ 我在 Cu 和磅之间的 2 和流电的代替反应4+可以指导这些上层建筑的形成。比较 electrocatalytic 性质为甲醇和乙醇氧化被调查了。由于他们的互连的手臂，足够的吸收地点，和暴露的表面，这些上层建筑展览为甲醇和乙醇的电镀物品氧化提高了 electrocatalytic 性能什么时候与商业 Pt/C 和磅黑色相比。

关键词：上层建筑三维电感耦合等离子体透射电子显微镜 ICP-OES 光学发射光谱铂铜

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Saponins and solvent extracts from Atriplex laciniata L. exhibited high anthelmintic and insecticidal activities

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Journal of Traditional Chinese Medicine 2017年第5期37卷 599-606页

作者： Zul Kamal farhat Ullah Sajjad Ahmad Muhammad Ayaz Abdul Sadiq Muhammad Imran Shujat Ahmad Faiz Ur Rahman Anwar Zeb Department of Pharmacy Shaheed Benazir Bhutto University Sheringal Dir Upper 18050Pakistan Department of Pharmacy University of Malakand Chakdara Dir Lower 18000 Pakistan Department of Zoology Shaheed Benazir Bhutto University Sheringal Dir Upper 18050 Pakistan

OBJECTIVE: To investigate saponins and various solvent extracts from Atriplex laciniata(A. laciniata)against human parasites and various ***: The samples from A. laciniata used in the activities were crude saponins(*** F) and solvent samples including methanolic extract(*** F), ethyl acetate(*** F), choloroform(*** F),n-hexane(*** F) and water residual(*** F). Anthelmintic potentials of the samples were analyzed against Pheretima posthuma(earthworms) and Ascaridia galli(round worms) using contact toxicity method. Insecticidal activities were performed against Heterotermes indicola(termite), Monomorium pharaonis(pharaoh ant), Tribolium castaneum(flour beetle) and Rhyzopertha dominica(grain borer) using standard ***: In anthelmintic assay, *** F and *** F were most effective against P. posthuma and A. gal-li with average death times of 25.62 and 29.65 min respectively. Likewise the anthelmintic assay, *** F and *** F were most effective against H. indicola causing 90.36% and 73.24% lethality respectively. Furthermore, in anti-Pharaoh activity *** F, *** F, *** F, *** F and *** F exhibited highest activity with LD50 of 78, 220, 260, 330 and > 800 mg/m L respectively. *** F and *** F were highly effective against R. dominica causing 80.11% and71.30% lethality respectively. *** F was found most active against T. ***: Our findings suggest that the *** F, *** F and *** F extracted from *** *** be the best options for the isolation of anthelmintic and bio-insecticidal compounds.

关键词： Saponins Atriplex 寄生虫 Heterotermes indicola Monomorium pharaonis Rhyzopertha dominica Tribolium castaneum

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Application of GIS for the identification and demarcation of selective heavy metal concentrations in the urban groundwater

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Journal of Geographical Sciences 2015年第2期25卷 225-235页

作者： Sobia ASHRAF farhat ABBAS Muhammad IBRAHIM Umer RASHID Shoaib KHALID Hammad Raza AHMAD Khalid Rehman HAKEEM Tahir MAJEED Department of Environmental Sciences and Engineering Government College University Faisalabad (38000) Pakistan Institute of Advanced Technology Universiti Putra Malaysia UPM Serdang 43400 Selangor Malaysia Department of Geography Government College University Faisalabad 38000 Pakistan institute of Soil & Environmental Sciences University of Agriculture Faisalabad 38040 Pakistan Faculty of Forestry University of Putra Malaysia Serdang 43400 Selangor Malaysia Institute of Soil Chemistry and Environmental Sciences Ayub Agricultural Research Institute (AARI) Jhang Road Faisalabad

Groundwater is the most appropriate and widely used source of drinking water, which is increasingly threatened by pollution from industrial and agricultural activities. To check the severity of the problem, 156 groundwater samples were collected from various depths （60-110 ft） of 52 different localities in Faisalabad city, the third largest metropolis in Pakistan, and analyzed for the metals （Zn, Cu, Cd, Ni, Pb, Mn and Fe） concentration in 2009. Quantification was done by using Flame Atomic Absorption Spectrophotometer technique and the results were compared with WHO standards for drinking water quality. Results showed that the levels of Cu, Mn and Fe were below the WHO standards while the concentrations of Zn, Cd, Ni and Pb were above the recommended levels of safe drinking water. Correlation analysis among the occurrence of these heavy metals revealed a highly significant and positive correlation of Mn with Zn and Fe. A significant and positive correlation of Cd was also found with Cu and groundwater depth showing that there is strong association between Cu-Cd pair and that the Cd concentration varies with depth of groundwater in the study area. Regional patterns of heavy metals occurrence were mapped using Geographical Information System （GIS） for the identification and demarcation of risk areas. The concentration maps may be used by policymakers of the city to mitigate groundwater pollution.

关键词： heavy metals groundwater contamination Faisalabad pollution mitigation

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