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Impact of Pollutant Concentration and Particle Deposition on the Radiative Flow of Casson-Micropolar Fluid between Parallel Plates

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Computer Modeling in Engineering & sciences 2025年第1期142卷 665-690页

作者： Ghaliah Alhamzi Badr saad T.Alkahtani Ravi shanker Dubey Vinutha Kalleshachar Neelima Nizampatnam Department of Mathematics and statistics College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11564Saudi Arabia Department of Mathematics College of ScienceKing Saud UniversityRiyadh11989Saudi Arabia Department of Mathematics Amity School of Applied SciencesAmity University RajasthanJaipur302002RajasthanIndia Department of studies in Mathematics Davangere UniversityDavangere577002India Department of Electronics and Communication Engineering Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru560035India

Assessing the behaviour and concentration of waste pollutants deposited between two parallel plates is essential for effective environmental *** the effectiveness of treatment methods in reducing pollution scales is made easier by analysing waste discharge *** waste discharge concentration analysis is useful for assessing how effectively wastewater treatment techniques reduce pollution *** study aims to explore the Casson micropolar fluid flow through two parallel plates with the influence of pollutant concentration and thermophoretic particle *** explore the mass and heat transport features,thermophoretic particle deposition and thermal radiation are *** governing equations are transformed into ordinary differential equations with the help of suitable similarity *** Runge-Kutta-Fehlberg’s fourthfifth order technique and shooting procedure are used to solve the reduced set of equations and boundary *** integration of a neural network model based on the Levenberg-Marquardt algorithm serves to improve the accuracy of predictions and optimize the analysis of *** outcomes are displayed to analyze the characteristics of the relevant dimensionless parameters in the current *** reveal that concentration upsurges as the micropolar parameter *** concentration reduces with an upsurge in the thermophoretic *** upsurge in the external pollutant source variation and the local pollutant external source parameters enhances mass *** surface drag force declines for improved values of porosity and micropolar parameters.

关键词： Micropolar fluid thermal radiation porous medium thermophoretic particle deposition waste discharge concentration

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Detection of oxidative stress and DNA damage in freshwater snail Lymnea leuteola exposed to profenofos

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Frontiers of Environmental science & Engineering 2018年第5期12卷 181-187页

作者： Daoud Ali Huma Ali saud Alifiri saad Alkahtani Abdullah A Alkahtane shaik Althaf Huasain Department of Zoology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia 2 Department of ChemistryMANITBhopal 462003India

Extensive production and use of organophosphate pesticide in agriculture,has risen concerned about its ecotoxicity and risk assessment of insecticides,which are more ***,the present investigation was aimed to study the induction of oxidative stress and DNA damage by organophosphate insecticide profenofos(PFF)in freshwater snail Lymnea luteola(***).The median lethal value(96 h LC50)of PFF was estimated as 1.26 mg/L for *** in a semi-static system and on the basis of LC50 value three concentrations viz.,0.126(1/10 of LC50,sublethal I),0.63(1/2 of LC50,sublethal II)and 0.84 mg/L(2/3 of LC50,sublethal III)were *** were exposed to above-mentioned concentrations of PFF along with solvent control(acetone)and negative control for 96 *** haemolymph was collected at 24 and 96 h of after *** heamolymph of PFF exposed snail,lipid peroxide,glutathione reduced glutathione s transferase and superoxide dismutase activities at the tested concentrations significantly differ from those in the *** genotoxicity induced in hemocytes of treated snails was measured by alkaline single cell gel electrophoresis *** data of this experiment demonstrated significantly enhancement of oxidative stress and DNA damage in the treated snails as compared to ***,we observed statistically significant correlations of ROs with DNA damage(%tail DNA)(R^(2)=0.9708)for 24 h and DNA damage(R^(2)=0.9665)for 96 *** of the current experiment can be useful in risk evaluation of PFF among aquatic *** study confirmed the use of comet assay for in vivo laboratory experiments using freshwater snail for selecting the toxic potential of industrial chemicals and environmental contaminants.

关键词： Acute toxicity Profenofos ROs oxidative stress DNA damage Lymnea luteola

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Medical treatment of inflammatory punctual stenosis monitored by anterior segment optical coherence tomography

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International Journal of Ophthalmology(English edition) 2020年第7期13卷 1074-1078页

作者： Hanan Youssef Elalfy Mahmoud A Elsamkary Ahmed M shafek Elridy Tarek M saad saad Mohamed Rashad samah M Fawzy Al Dorra subspecialty Ophthalmology Centre Cairo 11751Egypt Department of Ophthalmology Ain Shams UniversityCairo 11471Egypt

AIM:To evaluate the role of medical treatment in the management of inflammatory punctum stenosis guided by spectral domain anterior segment optical coherence tomography(OCT).METHODs:This prospective study included 60 patients complaining of epiphora due to inflammatory punctual *** were divided into two groups:Group A(30 patients)treated with a combination of preservative free hydrocortisone sodium phosphate 3.35 mg/m L eye drops,and preservative free artificial tears based on sodium hyaluronate,polyethylene and propylene Glycol;Group B(30 patients)treated with the same preservative free artificial tears *** normal subjects were included for comparison of pre-treatment anatomical *** starting treatment,all patients underwent anterior segment assessment including slit lamp examination,measurement of intraocular pressure(IOP),fluorescein dye disappearance test,and measurement of the outer punctum diameter(OPD)by spectral domain anterior segment *** assessments were repeated at each follow up done at 1 and 3 mo later,together with subjective evaluation of patient’s satisfaction of the treatment outcome by simple rating ***:Punctual diameter increased significantly with treatment in both groups(Ps more in Group A as compared to group B(16.2%vs 8%of the original punctual size,mean difference of 28.933μm,P=0.0076).subjective satisfaction with treatment outcome was also better in group A(70%vs 40%,Chi-square P=0.0397).CONCLUsION:A combination of preservative free steroid eye drops and artificial tears causes significant widening of inflammed stenotic punctae and improvement of the associated epiphora.

关键词： artificial tears hydrocortisone inflammatory punctual stenosis optical coherence tomography preservatives

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sorption of 2,4-dinitroanisole (DNAN) on lignin

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Journal of Environmental sciences 2012年第5期24卷 808-813页

作者： Rabih saad Zorana Radovic-Hrapovic Behzad Ahvazi sonia Thiboutot Guy Ampleman Jalal Hawari Biotechnology Research Institute National Research Council of Canada6100 Royalmount AvenueMontréalQuebecCanada Defense Research Development Canada Department of National DefenseValcartierQuebecCanada

The present study describes the use of two commercially available lignins,namely,alkali and organosolv lignin,for the removal of2,4-dinitroanisole（DNAN）,a chemical widely used by the military and the dye industry,from *** of DNAN on bothlignins reached equilibrium within 10 hr and followed pseudo second-order kinetics with sorption being faster with alkali than withorganosolv lignin,i.e.k2 10.3 and 0.3 g/（mg·hr）,*** a separate study we investigated sorption of DNAN between 10 and40 C and found that the removal of DNAN by organosolv lignin increased from 0.8 to 7.5 mg/g but reduced slightly from 8.5 to 7.6mg/g in the case of alkali *** isotherms for either alkali or organosolv lignin best fitted Freundlich equation with enthalpyof formation,H0 equaled to 14 or 80 kJ/*** help understand DNAN sorption mechanisms we characterized the two lignins byelemental analysis,BET nitrogen adsorption-desorption and 31P *** in elemental compositions between the two ligninsindicated that alkali lignin should have more sites（O-and s-containing functionalities） for *** BET surface area andcalculated total pore volume of alkali lignin were almost 10 times greater than that of organosolv lignin suggesting that alkali ligninshould provide more sites for sorption.31P NMR showed that organosolv lignin contains more phenolic-OH groups than alkali lignin,i.e.,70% and 45%,*** variations in the type of OH groups between the two lignins might have affected the strength ofH-bonding between DNAN and the type of lignin used.

关键词： sorption DNAN lignin kinetics isotherms.

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Ternary Fe3O4@PANI@Au nanocomposites as a magnetic catalyst for degradation of organic dyes

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science China(Technological sciences) 2017年第5期60卷 749-757页

作者： ZHU YuMei ZHOU XiaoWei CHEN Dongsheng LI Fang XUE Tao Ahmed saad FARAG Institute of New-Energy Materials School of Materials Science and Engineering Tianjin University Tianjin 300072 China Analysis Centre Tianjin University Tianjin 300072 China Eastman Institute for Oral Health University of Rochester Medical Center Rochester NY 14620 USA

Magnetic Fe_3O_4@PANI@Au nanocomposites are fabricated through electrostatic self-assembly and seed growth *** rate constant K_(app) is calculated to be 8.63×10^(-3) s^(-1) at room temperature for the reduction of 4-nitrophenol to 4-aminophenol with an excessive amount of NaBH_4 as a model system showing outstanding catalytic efficiency and *** recyclable performance,the catalyst exhibits slight loss in catalytic performance on the conversion of 4-nitrophenol after running for more than 10 ***,the smaller and simpler the structure,the easier the molecular structure can be degraded,and the faster the cationic dyes can be degraded than the anionic dyes,which can reveal the *** practical application,Congo red as a pollutant of the lake water is degraded rapidly after Fe_3O_4@PANI@Au is added to the solution in a few *** has been demonstrated that magnetic Fe_3O_4@PANI@Au nanoparticle composite is a promising catalyst for environment sewage.

关键词： Fe3O4@PANI@Au catalytic magnetic degradation 4-nitrophenol dyes

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PID Controller Tuning for a Multivariable Glass Furnace Process by Genetic Algorithm

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International Journal of Automation and computing 2016年第1期13卷 64-72页

作者： Kumaran Rajarathinam James Barry Gomm Ding-Li Yu Ahmed saad Abdelhadi Mechanical Engineering and Materials Research Centre Control Systems Group School of EngineeringLiverpool John Moores University

standard genetic algorithms （sGAs） are investigated to optimise discrete-time proportional-integral-derivative （PID） con- troller parameters, by three tuning approaches, for a multivariable glass furnace process with loop interaction. Initially, standard genetic algorithms （sGAs） are used to identify control oriented models of the plant which are subsequently used for controller optimisa- tion. An individual tuning approach without loop interaction is considered first to categorise the genetic operators, cost functions and improve searching boundaries to attain the desired performance criteria. The second tuning approach considers controller parameters optimisation with loop interaction and individual cost functions. While, the third tuning approach utilises a modified cost function which includes the total effect of both controlled variables, glass temperature and excess oxygen. This modified cost function is shown to exhibit improved control robustness and disturbance rejection under loop interaction.

关键词： Genetic algorithms control optimisation decentralised control proportional-integral-derivative (PID) control modifiedcost function multivariable process loop interaction.

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Link between COVID-19 vaccines and myocardial infarction

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World Journal of Clinical Cases 2022年第28期10卷 10109-10119页

作者： Umema Zafar Hamna Zafar Mian saad Ahmed Madiha Khattak Department of Physiology Khyber Medical CollegePeshawar 25000Pakistan Department of Medicine Khyber Teaching HospitalPeshawar 25000Pakistan Department of Forensic Medicine Khyber Medical CollegePeshawar 25000Pakistan

BACKGROUND Vaccines for coronavirus disease 2019(COVID-19) include Ch Ad Ox1-sARs-COV-2(Astra Zeneca),***2.s(Janssen),m RNA-1273(Moderna),BNT162b2(Pfizer),BBIBP-Cor V(sinopharm),Corona Vac(sinovac),and Bharat Biotech BBV152(Covaxin).AIM To find the association between COVID-19 vaccines and myocardial infarction(MI).METHODs This is a systematic review that involved searching databases such as MEDLINE,EMBAsE,and Pak Medi Net after making a search strategy using Me sH and Emtree *** criteria were set,and studies having no mention of MI as a complication of COVID-19 vaccination,protocols,genetic studies,and animal studies were *** was extracted using a predesigned extraction table,and 29 studies were selected after screening and applying the eligibility *** The majority of studies mentioned Astra Zeneca(18 studies) followed by Pfizer(14 studies) and Moderna(9 studies) in subjects reporting MI after *** of all the studies,69% reported MI cases after the first COVID-19 vaccination dose and 14% after the second,44% reported sT-segment elevation MI,and 26% reported non-sT-segment elevation *** mortality rate was 29% after *** In conclusion,many studies linked MI to COVID-19 vaccinations,but no definitive association could be found.

关键词： sARs-Co V-2 infection Vaccination Myocardial infarction Association Pfizer Astra Zeneca Moderna sinovac Janssen Covaxin

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Control of animal brucellosis: the Malaysian experience

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Asian Pacific Journal of Tropical Medicine 2016年第12期9卷 1111-1115页

作者： M.Zamri-saad M.I.Kamarudin Research Centre for Ruminant Diseases Faculty of Veterinary MedicineUniversiti Putra Malaysia Department of Veterinary services Malaysia Ministry of Agriculture and Agro-based Industry

Brucellosis is a zoonotic disease characterized by reproductive failure in animals and undulent fever in humans. In cattle, it is caused by Brucella abortus while in goats by Brucella melitensis, the main cause of brucellosis in humans. Brucellosis in livestock has been associated with importation of animals from breeder herd of unknown disease status. The prevalence of bovine brucellosis Brucella abortus in 2014 ranged between 1%-2% in Thailand and Indonesia, and 4%-5% in Malaysia and Myanmar. Prevalence of goat brucellosis Brucella melitensis is approximately 1% in Malaysia and Thailand. ‘Test-and-slaughter' is the general policy against brucellosis adopted by most AsEAN countries to eradicate the disease. Under this program, the Rose Bengal Plate Test(RBPT) is used as the screening test to identify infected farm/herd while the Complement Fixation Test(CFT) is the confirmatory test. The test-and-slaughter eradication strategy that was implemented since 1979 had managed to keep the prevalence rate to less than 5%, from 3.3% in 1979, 0.23% in 1988, 1% in 1998 and 5% in 2016. The test-and-slaughter program seemed effective in reducing the prevalence of brucellosis but was unable to eradicate the disease due to several factors, which include failure to locate and identify the remaining affected animals and to control their movement, importation of breeder animals from non-brucellosis free countries and lack of participation by the farmers following unrealiable test results. To support the eradication policy, research activities since 1980 s have suggested combinations of serological tests to improve diagnosis while surveillance should be focused on hotspots areas. The prevalence can be further reduced by strictly sourcing breeder animals from brucella-free areas or countries.

关键词： Brucellosis Animal Control

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Impact of preterm birth and low birth weight on medical conditions, medication use and mortality among neonates: a prospective observational cohort study

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World Journal of Pediatrics 2019年第3期15卷 281-288页

作者： Krishna Undela Bashar Talal saad Mohammed Parthasarathi Gurumurthy srinivasa Murthy Doreswamy Department of Pharmacy Practice JSS College of Pharmacy.JSS Academy of Higher Education and ResearchSS NagaraMysuru.Karnataka 570 015.India Department of Pediatrics JSS Medical College and Hospital.JSS Academy of Higher Education and ResearchMahatma Gandhi RoadMysuruKarnataka 570 004India

Background There is a paucity of studies conducted in India on neonatal outcomes of preterm birth and low birth ***,we aimed to assess the impact of preterm birth and low birth weight on medical conditions,medication use and mortality among *** A prospective observational cohort study was conducted at the neonatal intensive care unit (NICU) over a period of 9 *** of either sex,admitted to NICU and who received at least one medication were enrolled in the *** and demographic data,reason(s) for NICU admission,diagnoses,medications prescribed,medication-related problems,discharge status and the direct medical cost were documented and *** Four hundred and five neonates Were included in the study:60.5% were boys,32.7% were preterm and 44.2% were born *** sepsis (n =125,16.7%),unconjugated hyperbilirubinemia (n =83,11.1%) and respiratory distress syndrome (n =62,8.3%) were the most common medical conditions and were significantly more common among preterm and underweight *** half of the medications prescribed were anti-infectives for systemic use (n =1310,47.4%).The mean number of medications received by neonates increased from term to extremely preterm (5.2-15.0) and normal birth weight to extremely low birth weight (5.0-14.9).Mortality rate was significantly higher among extremely preterm (66.7%),and very preterm (15.2%) neonates compared to term (2.9%) *** median direct medical cost for NICU admission was INR 21,430 (UsD 331).Conclusion Medical conditions,medications prescribed and mortality rate were significantly higher among preterm and underweight neonates admitted to NICU.

关键词： Low birth weight Medical conditions Medications Mortality Preterm birth

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Describe the Mathematical Model for Exchanging Waves Between Bacterial and Cellular DNA

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Computers, Materials & Continua 2021年第9期68卷 3615-3628页

作者： Mohamed s.Mohamed sayed K.Elagan saad J.Almalki Muteb R.Alharthi Mohamed F.El-Badawy Amr M.s.Mahdy Department of Mathematics College of ScienceTaif UniversityTaif21944Saudi Arabia Microbiology and immunology Department Faculty of PharmacyUniversity of Sadat CityMenoufiya GovernorateEgypt

In this article,we have shown that bacterial DNA could act like some coils which interact with coil-like DNA of host *** decreasing the separating distance between two bacterial cellular DNA,the interaction potential,entropy,and the number of microstates of the system ***,the system gives its energy to the medium and the temperature of the host body *** could be seen as fever in *** emitting some special waves and changing the temperature of the medium,the effects of bacterial waves could be reduced and bacterial diseases could be *** investigators have shown that bacterial DNA could emit or absorb electromagnetic *** of the main experiments about bacterial waves has been done by Montagnier and his *** have shown that the genomic DNA of most pathogenic bacteria includes sequences that are able to emit electromagnetic *** results have shown that wave affects the crucial physicochemical processes in both Gram-positive and Gram-negative *** emphasis in this survey is on the development of controlling model equations and computer emulation of the model equations rather than on mathematical methods for solving the model equations and differential equations of epidemics.

关键词： DNA bacteria diseases inductor magnetic field

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