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Journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1311-1318页

作者： WOnG Yeong Yi f L Supian A Radzwan M Musa n f n abd karim Department of Physics Sultan Idris Education UniversityTanjong Malim 35900Malaysia Department of Chemistry Sultan Idris Education UniversityTanjong Malim 35900Malaysia

Calix[n]arenes was utilized to detect PABA,the primary sunscreen *** study investigates the interaction of calix[4]arene(C4),calix[6]arene(C6),and PABA using the Langmuir method and first-principle density functional theory(DfT).Using the Langmuir-Schaefer(LS)technique,an ultrathin film composed of calix[n]arenes and their complexes with PABA was deposited on various *** on the Langmuir study,the PABA molecule was bonded to the lower rims of both C4 and C6 with the host-guest ratio of 1:*** of the LS films formed were then characterized by ultravioletvisible spectroscopy(UV-Vis),fourier-transform infrared spectroscopy(fTIR)and carbon,hydrogen,nitrogen,sulfur elemental analyzer(CHnS).The band gap reduction obtained in the DfT study denotes the charge transfer interaction with promising reactivity between the calix[n]arenes and *** sensing of PABA by C4 and C6 is successful based on the formation of bonding between them due to the hosts’effective trapping *** outcomes of this study could be applied to drug delivery systems for future pharmaceutical and medical applications.

关键词： calix[n]arenes band gap density functional theory Langmuir-Schaefer PABA sensor

A COMPUTATIOnAL APPROACH fOR OPTIMAL COnTROL SYSTEMS GOVERnED BY PARABOLIC VARIATIOnAL InEQUALITIES

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Journal of Computational Mathematics 2003年第6期21卷 815-824页

作者： n.H.Sweilam L.f.abd-Elal Department of Mathematics Faculty of Science Cairo University Giza-EgyptDepartment of Mathematics Faculty of Science Cairo University Giza-Egypt

Iterative techniques for solving optimal control systems governed by parabolic varia-tional inequalities are presented. The techniques we use are based on linear finite elements method to approximate the state equations and nonlinear conjugate gradient methods to solve the discrete optimal control problem. Convergence results and numerical experiments are presented.

关键词： Parabolic variational inequalities finite elements method nonlinear conjugate gradient methods.

Various flows of black and grey particles produced in Mg-emulsion collisions at 4.5 A GeV/c

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Chinese Physics C 2011年第1期35卷 40-43页

作者：高雁刘福虎 n.n.abd Allah R.Bekmirzaev Department of Physics Xinzhou Normal University Institute of Theoretical Physics Shanxi University Department of Physics Faculty of ScienceSohag UniversitySohagEgypt nuclear Physics Department Djizak State Pedagogical InstituteDjizzak 708000Uzbekistan

Various flow phenomena of black particles （b-particles） and grey particles （g-particles） produced in magnesium-emulsion （Mg-Em） collisions at 4.5 A GeV/c are reported. These flows are directed and elliptic transverse flows （v1 and v2） related by the azimuthal angle （φ）, directed and elliptic reaction plane flows （vR1 and vR2） related by the projected angle （φ） on the reaction plane, and directed and elliptic polar direction flows （vp1 and vp2） related by the polar angle （）. We extract absolute flows as the direct experimental values minus the isotropic theoretical values. The dependence of the various flows on the target particle multiplicity and on the angles （ ,φ,φ） is investigated. Our results show that the dependence of b-particle flows on the target size is obvious and for heavy targets the dependence on target particle multiplicity is slight. Compared with b-particles, g-particles have a slight dependence on the target size and target particle multiplicity.

关键词： various flows absolute flows b- and g-particles Mg-Em collisions

Meshless Method for Analysis of Permeable Breakwaters in the Proximity of A Vertical Wall

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China Ocean Engineering 2019年第2期33卷 148-159页

作者： nadji CHIOUKH karim OUAZZAnE Yal??n YüKSEL Benameur HAMOUDI Esin ?EVIK Department of Hydraulics University Djillali Liabes of Sidi Bel-Abbes Laboratory of naval Aero-Hydrodynamics USTO MB faculty of Life Sciences and Computing London Metropolitan University Laboratory of Hydraulics and Coastal Engineering Yildiz Technical University

In the present work, the improved version of the meshless singular boundary method(ISBM) is developed for analyzing the performance of bottom standing submerged permeable breakwaters in regular normally incident waves and in the proximity of a vertical wall. Both single and dual prismatic breakwaters of rectangular and trapezoidal forms are examined. The physical problem is cast in terms of the Laplace equation governing an irrotational flow and incompressible fluid motion with appropriate mixed type boundary conditions, and solved numerically using the ISBM. To model the permeability of the breakwaters fully absorbing boundary conditions are assumed. numerical results are presented in terms of hydrodynamic quantities of the reflection coefficients. These are firstly validated against the results of a multi-domain boundary element method(BEM) developed independently for a previous study. The agreement between the results of the two methods is excellent. The coefficients of reflection are then computed and discussed for a variety of structural conditions including the breakwaters height, width, spacing, and absorbing permeability. Effects of the proximity of the vertical plane wall are also investigated. The breakwater's width is found to have only marginal effects compared with its height. Permeability tends to decrease the minimum reflections. These coefficients show periodic variations with the spacing relative to the wavelength. Trapezoidal breakwaters are found to be more cost-effective than the rectangular breakwaters. Dual breakwater systems are confirmed to perform much better than single structures.

关键词： meshless improved singular boundary method regular normal waves rectangular and trapezoidal breakwaters permeability vertical wall reflection

Varying Track Etch Rates along the fission fragments＇ Trajectories in CR-39 Detectors

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Chinese Physics Letters 2010年第5期27卷 76-79页

作者： n. All E. U. Khan A. Waheed S. karim f. Khan A. Majeed DPAM PLEAS P.O. Nilore Islamabad Pakistan P.D PINSTECH P.O. Nilore Islamabad Pakistan International Islamic University Islamabad Pakistan Department of Physics CIIT Islamabad Pakistan

We determine the behavior of track etch rate VT along the tracks in CR-39 detectors exposed to fission fragments from ^252Cf source. CR-39 detectors are etched at 70℃ in different concentrations of na2COa-mixed 6M naOH solutions for different etching time intervals of 5-10min starting from 15 min up to 210min. Two values of track etch rate are determined along the fission fragment trajectories. The variation in VT is correlated with the energy loss rate of the fission fragment in the detector material.

关键词： PARTICLE track etching nUCLEAR fission nUCLEAR fragmentation nUCLEAR track detectors TEMPERATURE effect SODIUM compounds CORRELATIOn (Statistics) EnERGY dissipation

Atomistic material behavior at extreme pressures

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npj Computational Materials 2016年第1期2卷 93-96页

作者： Laurent karim Béland Yuri n Osetsky Roger E Stoller Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTNUSA

Computer simulations are routinely performed to model the response of materials to extreme environments,such as neutron(or ion)*** latter involves high-energy collisions from which a recoiling atom creates a so-called atomic displacement *** cascades involve coordinated motion of atoms in the form of supersonic *** shockwaves are characterized by local atomic pressures 415 GPa and interatomic distances o2Å.Similar pressures and interatomic distances are observed in other extreme environment,including short-pulse laser ablation,high-impact ballistic collisions and diamond anvil *** cascade simulations using four different force fields,with initial kinetic energies ranging from 1 to 40 keV,show that there is a direct relationship between these high-pressure states and stable defect *** important shortcoming in the modeling of interatomic interactions at these short distances,which in turn determines final defect production,is brought to light.

关键词： extreme defect latter

Inhibition of vascular adhesion protein-1 modifies hepatic steatosis in vitro and in vivo

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World Journal of Hepatology 2020年第11期12卷 931-948页

作者： Emma L Shepherd Sumera karim Philip n newsome Patricia f Lalor Centre for Liver and Gastroenterology Research Birmingham National Institute for Health ResearchBirmingham Biomedical Research CentreInstitute of Immunology and ImmunotherapyUniversity of BirminghamBirmingham B152TTWest MidlandsUnited Kingdom Liver Unit Queen Elizabeth HospitalUniversity Hospitals BirminghamBirmingham B152TTWest MidlandsUnited Kingdom

BACKGROUnD non-alcoholic fatty liver disease(nAfLD)is associated with obesity,insulin resistance and dyslipidaemia and currently is estimated to affect up to a third of all individuals in developed *** standard of care for patients varies according to disease stage,but includes lifestyle interventions common insulin sensitizers,antioxidants and lipid ***,to date specific therapies have shown little histological or fibrosis stage improvement in large clinical trials,and there is still no licensed therapy for *** the high prevalence,limited treatment options and significant screening costs for the general population,new treatments are urgently *** To assess the potential for inhibition of the amine oxidase enzyme vascular adhesion protein-1(VAP-1)to modify hepatic lipid accumulation in *** We have used immunochemical and qPCR analysis to document expression of VAP-1 and key functional proteins and transporters across the nAfLD *** then utilised hepatocytes in culture and human precision cut liver slices in concert with selective enzyme activity inhibitors to test the effects of activating the semicarbazide-sensitive amine oxidase activity of VAP-1 on hepatic lipid uptake and triglyceride export.A murine model of nAfLD was also used to determine the consequences of VAP-1 knockout and gene expression arrays were used to quantify the effects of VAP-1 activity on key lipid modifying and proinflammatory gene *** We confirmed that increasing severity of nAfLD and progression to cirrhosis was associated with a significant increase in hepatocellular VAP-1 *** in vitro exposed to recombinant VAP-1 and its substrate methylamine showed increased lipid accumulation as determined by quantification of Oil Red O *** was recapitulated using hydrogen peroxide,and lipid accumulation was accompanied by changes in expression of the lipid transporter molecules fABP3,fATP6,insulin recep

关键词： non-alcoholic fatty liver disease Hepatocyte Lipid Cell biology Vascular adhesion protein-1 Steatosis

Modified thin manual Descemet stripping endothelial keratoplasty with air-guided, non-pachymetric donor lenticule dissection: outcomes of graft thickness and complication rate

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International Journal of Ophthalmology(English edition) 2020年第2期13卷 342-345页

作者： abdo karim Tourkmani Andrew M J Turnbull Parwez n Hossain Aristides Konstantopoulos David f Anderson Cornea and External Eye Disease Service Department of OphthalmologyUniversity Hospital SouthamptonSouthampton SO166YDUK.

●AIM:To describe a modified technique of donor lenticule dissection for thin manual Descemet stripping endothelial keratoplasty(TM-DSEK).●METHODS:Donor material was soaked in balanced salt solution(BSS)for 30 min,before being mounted on an artificial anterior chamber(AAC).Rather than BSS,the AAC was filled with filtered air,resulting in a visible reflection at the corneal endothelium-air *** reflection served as a landmark for the depth of the dissection,facilitating the creation of a thin lenticule with low risk of *** was commenced at a standardized depth of 500 microns,with no initial pachymetry *** 29 donor corneas were dissected by a novice TM-DSEK *** time,central graft thickness at 2 mo and complications were analysed.●RESULTS:Results were similar to other endothelial keratoplasty techniques,despite the cases being performed by a novice DSEK *** dissection time was 7 min(range 6-10).One graft perforation occurred(3.45%),but the air tamponaded the break and enabled dissection to be restarted and completed from a different *** central graft thickness after at least two months follow-up was 106 microns(range 25-170).●COnCLUSIOn:A problem with manual DSEK is the risk of graft perforation by attempting to dissect too thin a lenticule,or creating a thick graft due to fear of *** modified air-guided technique addresses this problem,and is recommended for surgeons either embarking on the learning curve,or who wish to achieve more consistently thin grafts while reducing perforation rates.

关键词： Descemet stripping endothelial keratoplasty manual donor lenticule dissection graft thickness

On thermoelastic problem based on four theories with the efficiency of the magnetic field and gravity

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Journal of Ocean Engineering and Science 2024年第4期9卷 338-347页

作者： A.A.Kilany A.n.abd-alla A.M.abd-Alla S.M.Abo-Dahab Department of Mathematics Faculty of ScienceSohag UniversitySohag 82524 Egypt Department of Computer Science Faculty of Computers and InformationLuxor UniversityEgypt Department of mathematics Faculty of ScienceSouth Valley UniversityQena 83523Egypt

The fundamental objective of this paper is to study the effectiveness of magnetic field and gravity on an isotropic homogeneous thermoelastic structure based on four theories of generalized *** another meaning,the models of coupled dynamic theory(CDT),Lord-Shulman(LS),Green-Lindsay(GL)as well as Green-naghdi(Gn II)will be taken in the ***,applying the harmonic method(normal mode technique),the solution of the governing equations and the expressions for the components of the displacement,temperature and(Mechanical and Maxwell’s)stresses is taken into account and calculated *** impacts of the gravity and magnetic field are illustrated graphically which are pronounced on the different physical ***,the results of some research that others have previously obtained may be found some or all of them as special cases from this study.

关键词： Generalized thermoelasticity Gravity Magnetic field Green and naghdi TheoryⅡ normal mode approach

The flow behavior of powder stearin-based methyl ester sulfonates and the effect of glidant

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Particuology 2023年第9期80卷 148-156页

作者： Zulina abd Maurad Luqman Chuah abdullah Mohd Shamsul Anuar nor nadiah abdul karim Shah Zainab Idris Malaysian Palm Oil Board 6Persiaran InstitusiBandar Baru Bangi43000SelangorMalaysia Department of Chemical and Environmental Engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia Department of Process and food Technology Faculty of EngineeringUniversiti Putra MalaysiaSerdangSelangor43400Malaysia

The preparation and behavior of powder stearin-based methyl ester sulfonates(MES)with the addition of builder as a glidant agent was *** is an anionic surfactant and its performance is equivalent to petroleum-based linear alkylbenzene sulfonates(LAS),the workhorses of the detergent *** the same time,zeolites or soda ash were the alternative builders for non-phosphate-based *** behavior of powder MES properties was measured in terms of morphology,particle size,cohesion,caking,and *** that,these palm stearin-based MES of carbon chain 16–18 with ratios of 98:2,80:20,and 60:40 in flakes were ground using a high shear mixer by 23,000 rpm to produce powder *** the particle size of MES powder can reduce the powder's cohesion,caking,and *** addition of zeolite or soda ash as a glidant in powdered MES can improve the caking *** high stearic in MES greatly influenced getting fine particle powders and required more glidant *** powder MES with excellent powder characteristics can perform well as a bio-based cleaning product.

关键词： Methyl ester sulfonates Caking Compaction Cohesion Glidant