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Comparative Study of the Effects of Nano ZnO and CuO on the Biodegradation,Biocompatibility,and Antibacterial Properties of Micro-arc Oxidation Coating of magnesium Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 242-254页

作者： Ying Shen Xianfeng Shan Iniobong P.Etim Muhammad Ali siddiqui Yang Yang Zewen Shi Xuping Su Junxiu Chen Key Laboratory of materials Surface Science and Technology of Jiangsu Province Changzhou UniversityChangzhou213164China Department of Stomatology The Affiliated Xinhua Hospital of Dalian UniversityDalian116000China Department of Physics University of CalabarCalabar540242Nigeria Metallurgical Engineering Department NED University of Engineering and TechnologyUniversity RoadKarachi75270Pakistan Ningbo No.2 hospital Ningbo315010China

This research systematically examined the degradation,antibacterial effects,and biocompatibility of micro-arc oxidation(maO)coatings with nano CuO and ZnO on extruded Mg *** copper(Cu)and Zinc(Zn)possess antibacterial *** findings demonstrated that adding ZnO will appreciably reduce the degradation rate of maO-coating alloy due to the self-sealing micro ***+maO coating exhibited excellent antibacterial performance,with an antibacterial rate of over 90%within 6 h co-cultured with Staphylococcus ***,the antibacterial rate of ZnO+maO coating reached 90%after 12 h *** test using MG63 cell indicated that the incorporation of CuO and ZnO did not notably affect the cell viability rate of the ***,after 14 days of culture,the CuO+maO and ZnO+maO coated samples exhibited higher alkaline phosphatase(ALP)activity than the maO-coated and uncoated samples,suggesting favorable osteogenic properties.

关键词： Copper oxide Zinc oxide Micro-arc oxidation(maO)coating Corrosion behavior Antibacterial characteristics

Predicting potential invasion risks of Leucaena leucocephala(Lam.)de Wit in the arid area of Saudi Arabia

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Journal of Arid Land 2024年第7期16卷 983-999页

作者： haq S maRIFATUL Darwish MOhAMMED Waheed MUhAMmaD Kumar maNOJ siddiqui h maNZER Bussmann W RAINER Department of Ethnobotany Institute of BotanyIlia State UniversityTbilisi 0162Georgia The Centre of Excellence on Sustainable Land management(CoE-SLM) Indian Council of Forestry Research and EducationDehradun 248006India Department of Botany and Microbiology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Botany State Museum for Natural HistoryKarlsruhe 76133Germany

The presence of invasive plant species poses a substantial ecological impact,thus comprehensive evaluation of their potential range and risk under the influence of climate change is *** study uses maximum entropy(maxEnt)modeling to forecast the likelihood of Leucaena leucocephala(Lam.)de Wit invasion in Saudi Arabia under present and future climate change *** the maxEnt modeling,we integrated climatic and soil data to predict habitat suitability for the invasive *** conducted a detailed analysis of the distribution patterns of the species,using climate variables and ecological *** focused on the important influence of temperature seasonality,temperature annual range,and precipitation *** distribution modeling used robust measures of area under the curve(AUC)and receiver-operator characteristic(ROC)curves,to map the invasion extent,which has a high level of accuracy in identifying appropriate *** complex interaction that influenced the invasion of *** was highlighted by the environmental parameters using Jackknife ***,the actual geographic area where *** was found in Saudi Arabia was considerably smaller than the theoretical maximum range,suggesting that it had the capacity to expand *** maxEnt model exhibited excellent prediction accuracy and produced reliable results based on the data from the ROC *** and temperature were the primary factors influencing the potential distribution of ***,an estimated area of 216,342 km^(2)in Saudi Arabia was at a high probability of invasion by *** investigated the potential for increased invasion hazards in the future due to climate change scenarios(Shared Socioeconomic Pathways(SSPs)245 and 585).The analysis of key climatic variables,including temperature seasonality and annual range,along with soil properties such as clay composition and nitrogen content,unveiled their substanti

关键词： area under the curve invasive species invasion risks climate change maxEnt model

Petrogenesis of Late Cretaceous Volcanism in Kazhaba Area and Its Relationship with mantle Plume Activity of Reunion hotspot

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Journal of Earth Science 2017年第2期28卷 229-240页

作者： Rehanul haq siddiqui Changqian ma Balochistan University of lnformation Technology Engineering and Management Science Quetta 87650 Pakistan School of Earth Sciences China University of GeosciencesWuhan 430074 China

Basaltic pillow lavas near the Kazhaba village in Balochistan are found in the tectonic slivers of the Bagh complex： the melange zone beneath the Muslim Bagh ophiolite complex. These volcanics are mainly represented by alkali basalts. The petrography and chemistry suggest that these volcanic rocks belong to mildly to strongly alkaline, intra-plate volcanic rock series. Their low Mg~# and low Cr, Ni and Co contents suggest that the parent magma of these volcanics was not directly derived from a partially melted mantle source, but resulted fractionation in an upper level magma chamber, en-route to eruption. Their LILE and hFSE, enriched primordial mantle-normalized patterns with marked positive Nb anomalies further confirm their within-plate geochemical signatures and are consistent with an enriched mantle source. Their highly enriched LREE patterns and high（La/Yb）_N and（Ce/Yb）_N ratios suggest a partially melted garnet-lherzolite parent magma source. The Zr versus Zr/Y studies suggest that these volcanics were derived from about 15% partially melted enriched mantle source. It is suggested that these Late Cretaceous intra-plate volcanics may represent the mantle plume activity of the Reunion hotspot, and were erupted during the passage of Ceno-Tethys Ocean floor prior to the passage of Indian Plate over it.

关键词： Late Cretaceous Kazhabavolcanics Balochistan Pakistan

Fallopian tube assessment of the peristaltic-ciliary flow of a linearly viscous fluid in a finite narrow tube

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Applied mathematics and Mechanics(English Edition) 2018年第3期39卷 437-454页

作者： h.AShRAF A.M.siddiqui M.A.RANA Department of mathematics and Statistics Riphah International University Department of mathematics York CampusPennsylvania State University

The present theoretical assessment deals with the peristaltic-ciliary trans- port of a developing embryo within a fallopian tubal fluid in the human fallopian tube. A mathematical model of peristalsis-cilia induced flow of a linearly viscous fluid within a fallopian tubal fluid in a finite two-dimensional narrow tube is developed. The lubrica- tion approximation theory is used to solve the resulting partial differential equation. The expressions for axial and radial velocities, pressure gradient, stream function, volume flow rate, and time mean volume flow rate are derived. Numerical integration is performed for the appropriate residue time over the wavelength and the pressure difference over the wavelength. Moreover, the plots of axial velocity, the appropriate residue time over wavelength, the vector, the pressure difference over wavelength, and the streamlines are displayed and discussed for emerging parameters and constants. Salient features of the pumping characteristics and the trapping phenomenon are discussed in detail. Yhrther- more, a comparison between the peristaltic flow and the peristaltic-ciliary flow is made as the special case. Relevance of the current results to the transport of a developing embryo within a fallopian tubal fluid from ampulla to the intramural in the fallopian tube is also explored. It reveals the fact that cilia along with peristalsis helps to complete the required mitotic divisions while transporting the developing embryo within a fallopian tubal fluid in the human fallopian tube.

关键词： peristaltic-ciliary flow linearly viscous fluid analytic solution human fal-lopian tube

Use of reducing agents for the aerobic growth of Campylobacter jejuni

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Asian Pacific Journal of Tropical Medicine 2010年第3期3卷 235-236页

作者： Rabia Sultana siddiqui Siti Asma h School of Dental Sciences Universiti Sains Malaysia16150 Kubang KerianKelantanMalaysia School of Medical Sciences Universiti Sains Malaysia16150 Kubang KerianKelantanMalaysia

Objective:To produce a technique for the growth of Campylobacter jejuni in aerobic condition Methods:Different combinations of reducing agents were tested in brucella broth and the growth turbidity was compared with tubes containing normal broth *** environment was also provided in a petri plate seeded with Campylobacter culture by pouring 3 different concentrations（10%,5%and 2.5%） of five reducing agents along with bacto-agar in the lid which was used to cover and seal the culture *** reducing agents were also added in broth in concentration of 0.25 mg/mL of each with different ***:In lid agar technique,Campylobacter jejuni growth appeared in all three concentrations of reducing agents, that is 10%,5%and 2.5%after 24 hours of incubation but the best results were observed in 10% *** colonial and morphological characters were not affected when the organisms were grown by this ***:It was found that reducing agents enhance the growth of ***/*** combination of FeSO4,Na2CO3 with h3BO3 worked as ideal mixture for the aerobic growth of *** technique is more economical as compared to commercially available media in the market and can be used for the oral facultative and microaerophilic bacterial growth in laboratory.

关键词： Camylobacter jejuni Microaerophilic Reducing agents Lid agar technique

On study of horizontal thin film flow of Sisko fluid due to surface tension gradient

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Applied mathematics and Mechanics(English Edition) 2015年第7期36卷 847-862页

作者： A.M.siddiqui h.AShRAF A.WALAIT T.hAROON Department of mathematics York CampusPennsylvania State University Department of mathematics COMSATS Institute of Information Technology

The present paper is concerned with the steady thin film flow of the Sisko fluid on a horizontal moving plate, where the surface tension gradient is a driving mechanism. The analytic solution for the resulting nonlinear ordinary differential equation is obtained by the Adomian decomposition method （ADM）. The physical quantities are derived including the pressure profile, the velocity profile, the maximum residue time, the stationary points, the volume flow rate, the average film velocity, the uniform film thickness, the shear stress, the surface tension profile~ and the vorticity vector. It is found that the velocity of the Sisko fluid film decreases when the fluid behavior index and the Sisko fluid parameter increase, whereas it increases with an increase in the inverse capillary number. An increase in the inverse capillary number results in an increase in the surface tension which in turn results in an increase in the surface tension gradient on the Sisko fluid film. The locations of the stationary points are shifted towards the moving plate with the increase in the inverse capillary number, and vice versa locations for the stationary points are found with the increasing Sisko fluid parameter. Furthermore, shear thinning and shear thickening characteristics of the Sisko fluid are discussed. A comparison is made between the Sisko fluid film and the Newtonian fluid film.

关键词： thin film flow Sisko fluid model horizontal moving plate surface tension gradient analytic solution Adomian decomposition method (ADM)

Prestroke selective serotonin reuptake inhibitor use and functional outcomes after ischaemic stroke

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Stroke & Vascular Neurology 2018年第1期3卷 9-16页

作者： mark R Etherton Khawja A siddiqui Lee h Schwamm Department of Neurology Harvard Medical SchoolBostonMassachusettsUSA Department of Neurology Massachusetts General HospitalBostonMassachusettsUSA

background Selective serotonin reuptake inhibitors(SSRIs)have been implicated in contributing to recovery after acute ischaemic *** particular,poststroke initiation of an SSRI has been demonstrated to improve motor *** role of prestroke SSRI use on functional outcomes and stroke recovery is less *** aimed to examine the effect of prestroke SSRI use on metrics of hospitalisation and functional *** We included 4968 consecutive patients from January 2006 to June 2015 in our local Get With The Guidelines-Stroke registry in whom a preadmission drug list could be extracted from an administrative research data *** and multivariate analyses were performed to identify predictors of functional *** On univariate analysis,among 4698 ischaemic strokes(740 SSRI users and 3948 non-users),SSRI use before acute ischaemic stroke did not impact the National Institutes of health Stroke Scale(NIhSS)admission score,length of stay or rate of symptomatic *** using SSRIs prior to their stroke were more likely to present with weakness(57% vs 47.3%;Phave hospitalisations complicated by pneumonia(7.6% vs 5.7%;Ph a negative impact on ambulatory status at discharge and discharge to *** multivariate regression analysis,SSRI use was associated with lower likelihood of discharge to home(adjusted OR 0.79,95% CI 0.62 to 0.997,Phaemic stroke is associated with lower rates of discharge to home despite no significant increase in length of stay or NIhSS score.

关键词： functional likely stroke

Nitrogen in Relation to Photosynthetic Capacity and Accumulation of Osmoprotectant and Nutrients in Brassica Genotypes Grown Under Salt Stress

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Agricultural Sciences in China 2010年第5期9卷 671-680页

作者： manzer h siddiqui Firoz Mohammad M Nasir Khan Mohamed h Al-Whaibi Ali h A Bahkali Department of Botany & Microbiology College of Science King Saud University Plant Physiology Section Department of Botany Aligarh Muslim University

Different strategies of the application of nutrients are required to overcome the adverse effects of mustard （Brassica juncea L.） in response to NaCl stress. The objective of the present study was to determine if different added levels of nitrogen （N） in growth medium could alleviate the adverse effects of salt stress on photosynthetic capacity and accumulation of osmoprotectants and nutrients. 14 days mustard seedlings of salt-sensitive （cv. Chuutki） and salt-tolerant （cv. Radha） genotypes were fed with：（i） 0 mmol L^-1 NaCl ＋ 0 mg N kg^-1 sand （control）, （ii） 90 mmol L^-1 NaCl ＋ 30 mg N kg^-1 sand, （iii） 90 mmol L^-1 NaCl ＋60 mg N kg^-1 sand, （iv） 90 mmol L^-1 NaCl ＋90 mg N kg^-1 sand and （v） 90 mmol L^-1NaCl＋ 120 mg N kg^-1 sand. Under the condition of salinity stress, N application caused a significant ameliorative effect on both genotypes with respect to growth attributes [fresh weight （FW） and dry weight （DW）] and physio-biochemical parameters [percent water content （WC）, net photosynthetic rate （PN）, stomatal conductance （gs）, total chlorophyll （Ch1）, carbonic anhydrase （CA） activity and malondialdehyde （MDA）, nitrogen （N）, potassium （K） and sodium （Na） contents, and K/Na ratio] and yield attributes （number of pods/plant, seeds/pod and seed yield/plant）. The salt-tolerant genotype exhibited maximum value for growth, physio-biochemical and yield attributes at 60 mg N kg 1 sand than that of salt-sensitive genotype. These results suggest that application of N may ameliorate most of the attributes and prove to be a physiological remedy to increase the tolerance against the ill effects of salt stress in Brassicas.

关键词： Brassica juncea L. carbonic anhydrase activity malondialdehyde net photosynthetic rate osmoprotectants,salt stress

Debye-hckel solution for steady electro-osmotic flow of micropolar fluid in cylindrical microcapillary

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Applied mathematics and Mechanics(English Edition) 2013年第11期34卷 1305-1326页

作者： A. A. siddiqui A. LAKhTAKIA Department of Basic Sciences Bahauddin Zakariya University Nanoengineered Metamaterials Group Department of Engineering Science and MechanicsPennsylvania State University University Park

Analytic expressions for speed, flux, microrotation, stress, and couple stress in a micropolar fluid exhibiting a steady, symmetric, and one-dimensional electro-osmotic flow in a uniform cylindrical microcapillary were derived under the constraint of the Debye-hiickel approximation, which is applicable when the cross-sectional radius of the microcapillary exceeds the Debye length, provided that the zeta potential is sufficiently small in magnitude. Since the aciculate particles in a micropolar fluid can rotate without translation, micropolarity affects the fluid speed, fluid flux, and one of the two non-zero components of the stress tensor. The axial speed in a micropolar fluid intensifies when the radius increases. The stress tensor is confined to the region near the wall of the mi- crocapillary, while the couple stress tensor is uniform across the cross-section.

关键词： couple stress electro-osmosis microcapillary micropolar fluid microrota-tion steady flow