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3-D seismic interpretation of stratigraphic and structural features in the Upper Jurassic to Lower Cretaceous sequence of the Gullfaks Field,Norwegian North Sea:A case study of reservoir development

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Energy Geoscience 2021年第4期2卷 287-297页

作者： Muhammad Usman Numair ahmed siddiqui Eduardo Garzanti Muhammad Jamil Qazi Sohail Imran Luqman ahmed Laboratory for Provenance Studies Department of Earth and Environmental SciencesUniversity of Milano-BicoccaPiazza Della Scienza 420126MilanoItaly Geoscience Department Universiti Teknologi PETRONASSeri Iskandar32610PerakMalaysia Shale Gas Research Group Institute of Hydrocarbon RecoveryUniversiti Teknologi PETRONASSeri Iskandar32610PerakMalaysia Institute of Geology University of the PunjabLahore56300Pakistan

The 3-D seismic dataset is a key tool to analyze and understand the mechanism of structural and stratigraphic hydrocarbon(HC)trapping in the *** used subsurface seismic characterization methods for fractures are based on the theory of effective anisotropy *** aim of this work is to improve the structural images with dense sampling of 3-D survey to evaluate structural and stratigraphic models for reservoir development to predict reservoir *** present study of the Gullfaks Field,located in the Norwegian North Sea Gullfaks sector,identifies the shallowest structural *** steepness of westward structural dip decreases eastward during the Upper Jurassic to Lower Cretaceous *** sands consist of the Middle Jurassic deltaic deposits and Lower Jurassic fluvial channel and delta plain *** supply steadily prevails on sea-level rise and the succession displays a regressive trend indicated by a good continuous stacking *** key factor for the development of reservoirs in the Gullfaks Field is fault transmissibility with spatially distributed *** majority of mapped faults with sand-to-sand contacts are non-sealing,which provide restriction for the HC flow between the fault *** traps for HC accumulation occur between the post-rift and syn-rift strata,*** set by extensional system,unconformity trap at the top of syndeposition,and structural trap due to normal *** reservoir quality in the studied area is generally excellent with average 35%porosity and permeability in the Darcy *** findings are useful to better understand the development of siliciclastic reservoirs in similar geological settings worldwide.

关键词： 3-D seismic model Mesozoic stratigraphic boundary Structural trap Reservoir quality Gullfaks Field

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Effect of layer sliding on the interfacial electronic properties of intercalated silicene/indium selenide van der Waals heterostructure

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Communications in Theoretical Physics 2022年第3期74卷 112-118页

作者： masood Yousaf M W Younis ahmed S Jbara M Junaid Iqbal Khan G Murtaza M A Saeed Department of Physics Division of Science and TechnologyUniversity of EducationLahore54770Pakistan Department of Chemistry University of Management and TechnologyC-IIJohar TownLahore54770Pakistan Mathematics Department College of Education for Pure ScienceAl-Muthanna UniversitySamawah66001Iraq Laboratory of Theoretical and Experimental Physics Department of PhysicsBahauddin Zakariya UniversityMultan60800Pakistan Materials Modelling Lab Department of PhysicsIslamia College PeshawarKPPakistan Department of Mathematics&Natural Sciences Prince Mohammad Bin Fahd UniversityP.O.Box 1664Alkhobar 31952Saudi Arabia

Methods capable of tuning the properties of van der Waals(vdW)layered materials in a controlled and reversible manner are highly *** electronic properties of two-dimensional vdW heterostructure consisting of silicene and indium selenide(InSe)have been calculated using density functional theory-based computational ***,in order to vary the aforementioned properties,silicene is slid over a InSe layer in the presence of Li *** intercalation of the heterostructure,the buckling parameter associated with the corrugation of silicene decreases from 0.44A to 0.36A,whereas the InSe structure remains *** energy scans reveal a significant increase in the sliding energy barrier for the case of intercalated heterostructure as compared with the unintercalated *** sliding of the silicene encounters the maximum energy barrier of 0.14 *** analysis shows the noteworthy differences between calculated in-plane and out-of-plane part of dielectric function.A variation of the planar average charge density difference,dipole charge transfer and dipole moment have been discussed to elucidate the usability spectrum of the *** employed approach based on intercalation and layer sliding can be effectively utilized for obtaining next-generation multifunctional devices.

关键词： vdW heterostructure intercalation tuning of properties layer sliding interfacial electronic properties

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Interaction of tetradecyltrimethylammonium bromide with bovine serum albumin in different compositions: Effect of temperatures and electrolytes/urea

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Chinese Journal of Chemical Engineering 2021年第1期34卷 279-287页

作者： Joynal Abedin ShamimMahbub Mohammad Majibur Rahman Anamul Hoque Dileep Kumar Javed masood Khan ahmed M.El-Sherbeeny Department of Chemistry Jahangirnagar UniversitySavarDhaka 1342Bangladesh Department of Chemistry&Physics Gono BishwabidyalaySavarDhaka 1344Bangladesh Department of Environmental Sciences Jahangirnagar UniversitySavarDhaka 1342Bangladesh 4 Division of Computational Phys ics Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityViet Nam Department of Food Science and Nutrition Faculty of Food and Agricultural SciencesKing Saud University2460Riyadh 11451Saudi Arabia Industrial Engineering Department College of EngineeringKing Saud UniversityP.O.Box 800Riyadh 11421Saudi Arabia

Herein,the interaction of a protein,bovine serum albumin(BSA),with tetradecyltrimethylammonium bromide(TTAB,a cationic surfactant),has been investigated using the conductivity measurement technique in pure water and some sodium salts(NaCl,Na_(2) SO_(4),Na_(2) CO_(3), and Na_(3) PO_(4)) solutions at temperature range of 295.15-320.15 *** reveal that,in the plot of specific conductivity versus the concentration of TTAB,only a single critical micelle concentration(cmc) was found for the TTAB+BSA mixed system in all solvents media *** addition of BSA in aqueous TTAB solution,the value of cmc undergoes a change from its pure form,which indicates the presence of strong interaction operating between the BSA and TTAB *** aqueous system,the cmc values of the TTAB+BSA mixtures are obtained higher compared to the values found for single TTAB surfactant However,the addition of salt decreases the cmc value of mixed TTAB+BSA *** values of cmc of the BSA+TTAB mixed system at 310.15 K and 1.00 mmol·kg^(-1) ionic strength of salt followed the order:cmc_(Na_(2) CO_(3))> Cmcc_(Na_(3) PO_(4))> cmcNaCl>cMC_(Na_(2) SO_(4)).The cmc values of TTAB+BSA mixture were found to be lowered in urea solution within the concentrations *** values of degree of dissociation(α) and fraction of counter ion binding(β) were found to be dependent on additives and *** free energy of micellization(AGm) is negative for all the systems,which manifests that the micellization phenomenon is energetically *** enhancement of the negative value of △G_(m)^(0) in aqueous salt solutions reveals an increase of spontaneity of the TTAB+BSA micellization *** values of △G_(m)^(0) also reveal that the spontaneity of micelle formation is enhanced at higher temperatures in all media *** values of free energy of transfer(△G_(m,t)^(o)) were also determined for numerous solvent media used in the present study and described with appropriate reasoning.

关键词： TTAB BSA Conductivity Electrolyte Exothermic interaction

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Antiacanthamoebic properties of natural and marketed honey in Pakistan

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Asian Pacific Journal of Tropical Biomedicine 2016年第11期6卷 967-972页

作者： Farzana Abubakar Yousuf Malik Hassan Mehmood Abdul Malik Ruqaiyyah siddiqui Naveed ahmed Khan Department of Biological and Biomedical Sciences Aga Khan University Department of Biological Sciences Faculty of Science and Technology Sunway University

Objective: To determine antiacanthamoebic activity of natural and marketed honey ***: Natural honey samples were collected directly from the bee hive and marketed honey samples were purchased from the local market in Karachi, Pakistan. Both honey samples were tested for their flavonoid content(quercetin equivalent per gram of the extract) and phenolic content(gallic acid equivalent per gram). Furthermore, their antioxidant activity was determined by measuring 2,2-diphenyl-1-picrylhydrazyl. Using amoebistatic and amoebicidal assays, the effects of honey samples were tested against growth and viability of Acanthamoeba ***: Natural honey exhibited potent amoebistatic and amoebicidal effects, in a concentration-dependent manner. Honey-treated Acanthamoeba castellanii showed loss of acanthopodia, following which amoebae detached, rounded up, reduced in size,decreased in cytoplasmic mass and they were observed floating in the culture ***, honey-treated amoebae did not revive when inoculated in fresh growth medium, however, glycerol-treated amoebae exhibited viable trophozoite and active growth. In contrast, marketed honey samples varied in their efficacy against Acanthamoeba castellanii. The proportion of flavonoid, as determined by quercetin measurements and the proportion of phenolic, as determined by gallic acid measurements was higher in natural honey compared with marketed honey. Similarly, the antioxidant activity, as determined by 2,2-diphenyl-1-picrylhydrazyl scavenging activity was higher in natural honey vs. marketed ***: This study shows that natural honey has antiacanthamoebic properties and possesses higher flavonoid, phenolic and antioxidant properties compared with the marketed honey. These findings are of concern to the public, health officials, and to the manufacturers regarding production of honey for medical applications.

关键词： Honey Acanthamoeba Amoebicidal Amoebistatic

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Indirect determination of serum creatinine reference intervals in a Pakistani pediatric population using big data analytics

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World Journal of Clinical Pediatrics 2021年第4期10卷 72-78页

作者： Sibtain ahmed Jakob Zierk Imran siddiqui Aysha Habib Khan Department of Pathology and Laboratory Medicine The Aga Khan UniversityKarachi 74800SindhPakistan Department of Pediatrics and Adolescent Medicine University Hospital ErlangenErlangen 91054Germany

BACKGROUND The indirect methods of reference intervals(RI)establishment based on data mining are utilized to overcome the ethical,practical challenges and the cost associated with the conventional direct *** To generate RIs for serum creatinine in children and adolescents using an indirect statistical *** Data mining of the laboratory information system was performed for serum creatinine analyzed from birth to 17 years for both *** timeline was set at six years from January 2013 to December *** Excel 2010 and an indirect algorithm developed by the German Society of Clinical Chemistry and Laboratory Medicine’s Working Group on Guide Limits were used for the data *** Data were extracted from 96104 samples and after excluding multiple samples for the same individual,we calculated RIs for 21920 males and 14846 females,with stratification into six discrete age *** Serum creatinine dynamics varied significantly across gender and age groups.

关键词： Creatinine Pediatric Reference intervals Indirect Data mining Pakistan

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An Improved Study of Electronic Band Structure and Optical Parameters of X-Phosphides (X=B, Al, Ga, In) by Modified Becke-Johnson Potential

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Communications in Theoretical Physics 2012年第11期58卷 777-784页

作者： masood Yousaf M.A. Saeed R. ahmed M.M. Alsardia Ahmad Radzi Mat Isa A. Shaari Physics Department Faculty of ScienceUniversiti Teknologi MalaysiaUTM Skudai81310 JohorMalaysia

We report the electronic band structure and optical parameters of X-Phosphides (X=B, Al,Ga,In) by first-principles technique based on a new approximation known as modified Becke-Johnson (mBJ). This potential is considered more accurate in elaborating excited states properties of insulators and semiconductors as compared to LDA and GGA. The present calculated band gaps values of BP, AlP, GaP, and InP are 1.867 eV, 2.268 eV, 2.090 eV, and 1.377 eV respectively, which are in close agreement to the experimental results. The band gap values trend in this study is as: Eg (mBJ-GGA/LDA)>Eg (GGA)> Eg (LDA). Optical parametric quantities (dielectric constant, refractive index, reflectivity and optical conductivity) which based on the band structure are also presented and discussed. BP, AlP, GaP, and InP have strong absorption in between the energy range 4-9eV, 4-7eV, 3-7eV, and 2-7eV respectively. Static dielectric constant, static refractive index and coefficient of reflectivity at zero frequency, within mBJ-GGA, are also calculated. BP, AlP, GaP, and InP show significant optical conductivity in the range 5.2-10eV, 4.3-8eV, 3.5-7.2eV, and 3.2-8eV respectively. The present study endorses that the said compounds can be used in opto-electronic applications, for different energy ranges.

关键词：电子能带结构光学参数磷化铝磷化镓磷化铟磷化物约翰逊静态介电常数

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In vivo immunomodulatory profile of histamine receptors(H1,H2,H3 and H4):a comparative antagonists study

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Asian Pacific Journal of Tropical Medicine 2010年第6期3卷 465-470页

作者： Trivendra Tripathi Mohammad Shahid Haris M Khan Aijaz ahmed Khan Mashiatullah siddiqui Rahat Ali Khan Department of Biochemistry Faculty of MedicineJawaharlal Nehru Medical College & HospitalAligarh Muslim UniversityAligarh-202002U.P.India Department of Microbiology Faculty of MedicineJawaharlal Nehru Medical College & HospitalAligarh Muslim UniversityAligarh-202002U.P.India Department of Anatomy Faculty of MedicineJawaharlal Nehru Medical College & HospitalAligarh Muslim UniversityAligarh-202002U.P.India Department of Pharmacology Faculty of MedicineJawaharlal Nehru Medical College & HospitalAligarh Muslim UniversityAligarh-202002U.P.India

Objective:To delineate the comparative immunomodulatory roles of H1R-H4R in antibody generation profile in rabbit ***:The cohort comprised of eight groups containing 18(9 male and 9 female) rabbits in each ***Ⅰremained non-immunized and received only vehicle(sterile distilled water,1 mL/kg×b.i.d.) ***Ⅱreceived vehicle (1 mL/kg×b.i.d.) while GroupsⅢ-Ⅶ(drugs-treated) received subcutaneous histamine (100μg/kg×b.i.d.),and intramuscular H1R-antagonist(pheniramine,10 mg/kg×b.i.d.), H2R-antagonist(ranitidine,10 mg/kg×b.i.d.),H3R-antagonist(iodophenpropit,1μg/kg×b.i.d.) and H4R-antagonist(JNJ 7777120,10μg/kg×b.i.d.),and GroupⅧDMSO(1 mL/kg×b.i.d.),respectively for 10 days(starting from day 1).They were subsequendy immunized with intravenous injection of sheep red blood cells(SRBC) at day *** estimation of serum Igs,IgM and IgG were done by ELISA,and observed at day 0(pre-immunization),and 7,14,21,28 and 58(post-immunization).Results:It was shown that histamine and HRs-antagonists could influence a detectable antibody response to SRBC as early as day 7-post-immunization(post-Ⅰ), which lasted until day 58 post-Ⅰ.The results were found statistically significant(P<0.05,). Conclusions:This study suggests that histamine receptors play important roles in modulation of antibody generation in which H1R,H2R and H4R have immunosuppressive roles and conversely, H3R playes an immune enhancing *** findings of this study may have clinical significance and provide the baseline information for future study.

关键词： Histamine receptors Immunomodulation Humoral immune response H3R-antagonist H4R-antagonist

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Water Quality Evaluation of Chapurson Valley in Hunza Nagar, Gilgit Baltistan, Pakistan, Based on Statistical Analysis and Water Quality Index

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Health 2023年第5期15卷 379-396页

作者： Syeda Urooj Fatima Moazzam Ali Khan Aamir Alamgir Nasir Sulman Tariq masood Ali Khan Faisal ahmed Khan Muhammad Azhar Khan Institute of Environmental Studies University of Karachi Karachi Pakistan

Water borne ailments are of serious public health concern in Gilgit Baltistan’s (GB) region of Pakistan. The pollution load on the glacio-fluvial streams and surface water resources of the Chapurson Valley in the Hunza Nagar area of the GB is increasing as a result of anthropogenic activities and tourism. The present study focuses on the public health quality of drinking water of Chapurson valley. The study addressed the fundamental drinking water quality criteria in order to understand the state of the public health in the valley. To ascertain the current status of physico-chemical, metals, and bacteriological parameters, 25 water samples were collected through deterministic sampling strategy and examined accordingly. The physico-chemical parameters of the water samples collected from the valley were found to meet the World Health Organization (WHO) guidelines of drinking water. The water samples showed a pattern of mean metal concentrations in order of Arsenic (As) > Lead (Pb) > Iron (Fe) > Zinc (Zn) > Copper (Cu) > Magnesium (Mg) > Calcium (Ca). As, Cu, Zn, Ca and Mg concentration were under the WHO guidelines range. However, results showed that Pb and Fe are present at much higher concentrations than recommended WHO guidelines. Similarly, the results of the bacteriological analysis indicate that the water samples are heavily contaminated with the organisms of public health importance (including total coliforms (TCC), total faecal coliforms (TFC) and total fecal streptococci (TFS) are more than 3 MPN/100mL). Three principal components, accounting for 48.44% of the total variance, were revealed using principal component analysis (PCA). Bacteriological parameters were shown to be the main determinants of the water quality as depicted by the PCA analysis. The dendrogram of Cluster analysis using the Ward’s method validated the same traits of the sampling locations that were found to be contaminated during geospatial analysis using the Inverse Distance Weight (IDW) m

关键词： Chapurson Valley Water Quality Physico-Chemical Principal Component Analysis (PCA) Inverse Distance Weight (IDW)

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Reversible and irreversible adsorption of bare and hybrid silica nanoparticles onto carbonate surface at reservoir condition

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Petroleum 2020年第3期6卷 277-285页

作者： Zain-UL-Abedin Arain Sarmad Al-Anssari Muhammad Ali Shoaib Memon masood ahmed Bhatti Christopher Lagat Mohammad Sarmadivaleh Department of Petroleum Engineering WA School of Mines:MineralsEnergy and Chemical EngineeringCurtin University26 Dick Perry Avenue6151KensingtonAustralia Department of Chemical Engineering College of EngineeringUniversity of BaghdadBaghdadIraq School of Engineering Edith Cowan University270 Joondalup DriveJoondalupWA6027Australia Premier Oilfield Solutions Australia

Realistic implementation of nanofluids in subsurface projects including carbon geosequestration and enhanced oil recovery requires full understanding of nanoparticles(NPs)adsorption behaviour in the porous *** physicochemical interactions between NPs and between the NP and the porous media grain surface control the adsorption behavior of *** study investigates the reversible and irreversible adsorption of silica NPs onto oil-wet and water-wet carbonate surfaces at reservoir *** carbonate sample was treated with different concentrations of silica nanofluid to investigate NP adsorption in terms of nanoparticles initial size and hydrophobicity at different temperatures,and *** behaviour and the reversibility of NP adsorption onto carbonate surfaces was measured using dynamic light scattering(DLS),scanning electron microscope(SEM)images,energy dispersive X-ray spectroscope(EDS),and atomic force microscope(AFM)*** show that the initial hydrophilicity of the NP and the carbonate rock surface can influence the NPs adsorption onto the rock ***,oppositely charged NP and rock surface are attracted to each other,forming a mono or multilayers of NPs on the *** conditions including pressure and temperature have shown minor influence on nano-treatment ***,DLS measurement proved the impact of hydrophilicity on the stability and adsorption trend of *** was also confirmed by SEM ***,AFM results indicated that a wide-ranging adsorption scenario of NPs on the carbonate surface *** results were obtained from the EDS *** study thus gives the first insight into NPs adsorption onto carbonate surfaces at reservoirs conditions.

关键词： Nanofluid Silica nanoparticles Wettability Contact angle Surface treatment Adsorption Salinity Carbonate reservoir Carbonate

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Adaptation of Vehicular Ad hoc Network Clustering Protocol for Smart Transportation

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Computers, Materials & Continua 2021年第5期67卷 1353-1368页

作者： masood Ahmad Abdul Hameed Fasee Ullah Ishtiaq Wahid Atif Khan M.Irfan Uddin Shaq Ahmad ahmed M.El-Sherbeeny Department of Computer Science Abdul Wali Khan University Mardan23200Pakistan Department of Computing and Technology Iqra UniversityIslamabadPakistan Department of Computer Science and Information Technology Sarhad University of Science and Information TechnologyPeshawar25000Pakistan Department of Computer Science Islamia College PeshawarPeshawar25000Pakistan Institute of Computing Kohat University of Science and TechnologyKohat2600Pakistan Department of Industrial Engineering College of EngineeringKing Saud UniversityRiyadh11421Saudi Arabia

Clustering algorithms optimization can minimize topology maintenance overhead in large scale vehicular Ad hoc networks(VANETs)for smart transportation that results from dynamic topology,limited resources and noncentralized *** performance of a clustering algorithm varies with the underlying mobility model to address the topology maintenance overhead issue in VANETs for smart *** design a robust clustering algorithm,careful attention must be paid to components like mobility models and performance objectives.A clustering algorithm may not perform well with every mobility ***,we propose a supervisory protocol(SP)that observes the mobility pattern of vehicles and identies the realistic Mobility model through microscopic *** analytical model can be used to determine an efcient clustering algorithm for a specic mobility model(MM).SP selects the best clustering scheme according to the mobility model and guarantees a consistent performance throughout VANET *** simulation has performed in three parts that is the central part simulation for setting up the clustering environment,In the second part the clustering algorithms are tested for efciency in a constrained atmosphere for some time and the third part represents the proposed *** simulation results show that the proposed scheme outperforms clustering algorithms such as honey bee algorithm-based clustering and memetic clustering in terms of cluster count,re-afliation rate,control overhead and cluster lifetime.

关键词： Cluster VANET smart transportation supervisory protocol mobility models

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