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| 1 | Microbiologically influenced corrosion of titanium caused by aerobic marine bacterium Pseudomonas aeruginosa显示文摘Microbiologically influenced corrosion(MIC) is a big threat to the strength and safety of many metallic materials used in different environments throughout the world. The metabolites and bioactivity of the microorganisms cause severe deterioration on the metals. In this study, MIC of pure titanium(Ti) was studied in the presence of a highly corrosive aerobic marine bacterium Pseudomonas aeruginosa. The results obtained from electrochemical test showed that Ti was corrosion resistant in the abiotic culture medium after 14 d, while the increased corrosion current density(i_(corr)) obtained from polarization curves and the decreased charge transfer resistance(R_(ct)) from electrochemical impedance spectroscopy(EIS)indicated the accelerated corrosion of Ti caused by P. aeruginosa biofilm. For further confirmation of the above results, the surface of Ti was investigated using scanning electron microscopy(SEM), confocal laser scanning microscopy(CLSM) and X-ray photoelectron spectroscopy(XPS). According to the XPS results, TiO_2 was formed in both abiotic and biotic conditions, while unstable oxide Ti_2O_3 was detected in the presence of P. aeruginosa, leading to the defects in the passive film and localized corrosion. Pitting corrosion was investigated with the help of CLSM, and the largest pit depth found on Ti surface immersed in P. aeruginosa was 1.2 μm. Ti was not immune to MIC caused by P. aeruginosa. | M.Saleem Khan Zhong Li Ke Yang Dake Xu Chunguang Yang Dan Liu Yassir Lekbach Enze Zhou Phuri Kalnaowakul | 2019 | Journal of Materials Science & Technology2019，35，1： | 8 |
| 2 | Characterization of vanadyl phthalocyanine based surface-type capacitive humidity sensors显示文摘This study presents the fabrication and characterization of novel surface-type capacitive humidity sensors using vanadyl phthalocyanine(VOPc) as the active material.The devices,which comprise three different thicknesses, have been fabricated using the thermal evaporation technique.A thin film of VOPc is deposited on thoroughly cleaned glass substrates with pre-patterned Ag electrodes.The capacitive effect of the samples under humidity has been investigated. Comparison of the samples with different thicknesses shows that the thinnest device seems more sensitive towards humidity.The humidity dependent capacitance properties of the sensor make it beneficial for use in commercial hygrometers. | Fakhra Aziz M.H.Sayyad Khassan S.Karimov M.Saleem Zubair Ahmad S.Mahmood Khan | 2010 | Journal of Semiconductors2010，31，11： | 2 |
| 3 | Corrosion Inhibition of X80 Steel in Simulated Marine Environment with Marinobacter aquaeolei显示文摘In the present study, a novel bacterium( Marinobacter aquaeolei) was examined for its corrosion inhibiting behaviour against X80 pipeline steel. Electrochemical results showed that X80 steel immersed in the solution inoculated with M. aquaeolei possessed very high corrosion resistance compared to that of abiotic control. Besides, scanning electron microscopy, confocal laser scanning microscopy and energy-dispersive X-ray spectroscopy were employed to analyse the corrosion product and the biofi lm formed on the metal surface. Fourier-transform infrared spectroscopy was also applied to determine the composition of extracellular polymeric substances(EPS). Above results indicated that the corrosion inhibition effciency observed in biotic medium was very high(91%), proving that M. aquaeolei was an effective inhibitive agent for the corrosion of carbon steel. The inhibition was credited to the formation of bacterial biofi lm and the compact protective layer of the secreted EPS. Thus, this study will introduce a natural, environmentally friendly and cost-effective system for the corrosion control of the carbon steel. | M.Saleem Khan Dake Xu Dan Liu Yassir Lekbach Ke Yang Chunguang Yang | 2019 | Acta Metallurgica Sinica(English Letters)2019，32，11： | 2 |
| 4 | The effect of Urban Heat Island mitigation strategies on outdoor human thermal comfort in the city of Baghdad显示文摘Todays,most Iraqi cities suffer from extremely hot-dry climate for long periods throughout the year.However,most urban patterns that exist inside these cities are not suitable for this harsh conditions and lead to an increase in the value of the Urban Heat Island(UHI)index.Consequently,this will increase outdoor human thermal discomfort as well as energy consumption and air pollution in cities.This study attempts to evaluate the effect of UHI mitigation strategies on outdoor human thermal comfort in three different common types of urban patterns in the biggest and most populated city in Iraq,Baghdad.Three different mitigation strategies are used here-vegetation,cool materials,and urban geometry-to build 18 different scenarios.Three-dimensional numerical software ENVI-met 4.2 is utilised to analyse and assess the studied parameters.The input data for simulations process are based on two meteorological stations in Baghdad:Iraqi Meteorological Organization&Seismology,and Iraqi Agrometeorological Network.All measurements are taken in a pedestrian walkway.The results of different scenarios are compared based on their effect on human thermal comfort.Outdoor thermal comfort is assessed according to Predicted Mean Vote index,as mentioned in ISO 7730 standard.This study provides a better understanding of the role of UHI mitigation strategies on human thermal comfort in the outdoor spaces of Baghdad’s residential neighbourhoods.This can help generate guidelines of urban design and planning practices for better thermal performance in hot and dry cities. | Aws M.Salman Younis M.Saleem | 2021 | Frontiers of Architectural Research2021，10，4： | 1 |
| 5 | Investigation of microbial corrosion inhibition of Cu-bearing 316L stainless steel in the presence of acid producing bacterium Acidithiobacillus caldus SM-1显示文摘Stainless steel(SS)has unsatisfied corrosion resistance in many aggressive environments,particularly under a low p H condition in the bioleaching industry.In this study,through surface analyses and electrochemical measurements,the corrosion resistance of a novel Cu-bearing 316L SS was evaluated in the presence of an acid-producing bacterium,Acidithiobacillus caldus SM-1 that was able to create an extremely acidic corrosive environment.The significantly enhanced anti-microbiologically-inducedcorrosion performance could be explained by the intracellular reactive oxygen species(ROS)and Fenton reaction on the Cu-bearing 316L SS. | Yuqiao Dong Jiaqi Li Dake Xu Guangling Song Dan Liu Haipeng Wang M.Saleem Khan Ke Yang Fuhui Wang | 2021 | Journal of Materials Science & Technology2021，，5： | 1 |
| 6 | 有关Lagrange方法的一些结果显示文摘本文阐明由Lagrange和其他作者为求n2阶非齐次线性微分方程的一个特解所加的条件有时是方便的,但不总是最好的,可以用添加更一般的条件来得到一个特解. | S.A.Obaid M.Saleem 李鸿祥 | 2008 | 高等数学研究2008，11，3： | 1 |
| 7 | Optimization of environmental parameters for biodegradation of alpha and beta endosulfan in soil slurry by Pseudomonas aeruginosa显示文摘 | M.Arshad S.Hussain M.Saleem | 2008 | Journal of Applied Microbiology2008，，2： | 1 |
| 8 | Strip distortion generator for simulating inlet flow distortion in gas turbine engine ground test facilities显示文摘A methodology has been developed to generate a non-uniform/distoited inlet flow field to test a gas turbine engine in ground test facilities.The distorted flow field is generated by positioning radial and circumferential strips of varying widths upstream of the Aerodynamic Interface Plane.The interacting wakes from these strips are used to generate a given target flow field.The approximate superposition of these wakes is investigated and used to construct the strip arrangement which is subsequently validated by computing the flow field by solving the Navier-Stokes equations.The strip geometry designed using the present methodology is able to produce the target Mach number distribution with a root-mean-square error of 5.06%. | M.Saleem Yusoof M.Sivapragasam M.D.Deshpande | 2016 | Propulsion and Power Research2016，5，4： | 1 |
| 9 | Resistive humidity sensor based on vanadium complex films显示文摘A resistive-type relative humidity (RH) sensor based on vanadium complex (VO_2(3-fl)) film is reported inthisstudy.Gold electrodes were deposited on the glass substrates in a co-planar structure.A thin film of vanadium complex was coated as a humidity-sensing material on the top of the pre-patterned electrodes.The humidity-sensing principle of the sensor was based on the conductivity change of coated sensing element upon adsorption/desorption of water vapor. The resistance of the humidity sensor measured at 1 kHz decreased linearly with increasing the humidity in the range of 35%–70% RH. The overall resistance of the sensor decreases 11 times. An equivalent circuit for the VO_2(3-fl) based resistive-type humidity sensor was developed. The properties of the sensor studied in this work make it beneficial for use in the instruments for environmental monitoring of humidity. | Kh.S.Karimov M.Saleem M.Mahroof-Tahir R.Akram M.T.Saeed Chanee A.K.Niaz | 2014 | Journal of Semiconductors2014，35，9： | 1 |
| 10 | Surface-type humidity sensor based on cellulose-PEPC for telemetry systems显示文摘Au/cellulose-PEPC/Au surface-type humidity sensors were fabricated by drop-casting cellulose and poly-N-epoxypropylcarbazole(PEPC) blend thin films.A blend of 2wt%of each cellulose and PEPC in benzol was used for the deposition of humidity sensing films.Blend films were deposited on glass substrates with preliminary deposited surface-type gold electrodes.Films of different thicknesses of cellulose and PEPC composite were deposited by drop-casting technique.A change in electrical resistance and capacitance of the fabricated devices was observed by increasing the relative humidity in the range of 0-95%RH.It was observed that the capacitances of the sensors increase,while their resistances decrease with increasing the relative humidity.The sensors were connected to op-amp square wave oscillators.It was observed that with increasing the relative humidity,the oscillator's frequencies were also increased in the range of 4.2-12.0 kHz for 65μm thick film sample,4.1-9.0 kHz for 88μm thick film sample,and 4.2-9.0 kHz for 210μm sample.Effects of film thickness on the oscillator's frequency with respect to humidity were also investigated.This polymer humidity sensor controlled oscillator can be used for short-range and long-range remote systems at environmental monitoring and assessment of the humidity level. | Kh.S.Karimov M.Saleem T.A.Qasuria M.Farooq | 2011 | Journal of Semiconductors2011，32，1： | 0 |
| 11 | Ag/PEPC/NiPc/ZnO/Ag thin film capacitive and resistive humidity sensors显示文摘A thin film of blended poly-N-epoxypropylcarbazole(PEPC)(25 wt.%),nickel phthalocyanine(NiPc)(50 wt.%) and ZnO nano-powder(25 wt.%) in benzene(5 wt.%) was spin-coated on a glass substrate with silver electrodes to produce a surface-type Ag/PEPC/NiPc/ZnO/Ag capacitive and resistive sensor.Sensors with two different PEPC/NiPc/ZnO film thicknesses(330 and 400 nm) were fabricated and compared.The effects of humidity on capacitance and resistance of the Ag/PEPC/NiPc/ZnO/Ag sensors were investigated at two frequencies of the applied voltage:120 Hz and 1 kHz.It was observed that at 120 Hz under humidity of up to 95%RH the capacitance of the sensors increased by 540 times and resistance decreased by 450 times with respect to humidity conditions of 50%RH. It was found that the sensor with a thinner semiconducting film(330 nm) was more sensitive than the sensor with a thicker film(400 nm).The sensitivity was improved when the sensor was used at a lower frequency as compared with a high frequency.It is assumed that the humidity response of the sensors is associated with absorption of water vapors and doping of water molecules in the semiconductor blend layer.This had been proven by simulation of the capacitance-humidity relationship. | Kh.S.Karimov Kuan Yew Cheong M.Saleem Imran Murtaza M.Farooq Ahmad Fauzi Mohd Noor | 2010 | Journal of Semiconductors2010，31，5： | 0 |
| 12 | Temperature sensor based on composite film of vanadium complex(VO_2(3-fl))and CNT显示文摘A vanadium complex(VO2(3-fl)) and CNT composite film based temperature sensor is reported in this study. Surface-type silver electrodes were deposited on the glass substrates. A thin film of VO2(3-fl) and CNT composite was coated as a temperature-sensing material on the top of the pre-patterned Ag electrodes. The temperature-sensing principle of the sensor was based on the conductivity change of the coated sensing element upon heating or cooling processes. DC and AC(100 Hz) resistances of the temperature sensor decreased quasilinearly with increasing the temperature in the range of 25–80°C. The overall resistance of the sensor decreases by 1.8–2.1 and 1.9–2.0 times at DC and AC voltage, respectively. The resistance temperature coefficients of the sensor were in the range of –(0.9–1.3)% and –(1.1–1.3)% at DC and AC voltage, respectively. The properties of the sensor studied in this work, make it beneficial to be used in the instruments for environmental monitoring of temperature. | Kh.S.Karimov M.Mahroof-Tahir M.Saleem M.Tariq Saeed Chani A.Khan Niaz | 2015 | Journal of Semiconductors2015，36，7： | 0 |
| 13 | Optical transmission in thin films of vanadium compounds显示文摘Thin films of five vanadium compounds/composite:(1) VO2(3-fl)(3-fl=3-Hydroxyflavone),(2)VO(pbd)2(pbd=1-Phenyl-1, 3-butadione),(3) VO(dbm)2(dbm= Dibenzoylmethane),(4) VPc(Vanadyl Phthalocyanine)and(5) V2O5-PEPC(V2O5- poly-N-epoxypropylcarbazole composite), were deposited by the dropcasting method from the solution in benzene. The transmittance–irradiance relationships were investigated and the transmission in the visible spectrum and optical images were obtained as well. It was found that the transmittance of the VO2(3-fl), VO(pbd)2, VO(dbm)2 and VPc, was practically independent of the irradiance; whereas the transmittance of V2O5-PEPC decreased by 4% for thin and 9% for thick films with an increase of the irradiance. | Kh.S.Karimov M.Mahroof-Tahir M.Saleem N.Ahmad A.Rashid | 2014 | Journal of Semiconductors2014，35，7： | 0 |
| 14 | Study of structural and dielectric properties of La_(0.9)Na_(0.1)CrO_(3)-and Ni_(0.5)Cu_(0.5)Fe_(2)O_(4)-based composites显示文摘The preparation of La_(0.9)Na_(0.1)CrO_(3)(LNCO),Ni_(0.5)Cu_(0.5)Fe_(2)O_(4)(NCFO)and their composites of the type e1xT La_(0.9)Na_(0.1)CrO_(3)(LNCO)t(x)Ni_(0.5)Cu_(0.5)Fe_(2)O_(4)(NCFO)ex?0.25,0.50T through solid state route is reported.From X-ray diffraction data analysis,the parent La_(0.9)Na_(0.1)CrO_(3)was found to crystallize in orthorhombic structure(Pnma)while Ni_(0.5)Cu_(0.5)Fe_(2)O_(4)has crystallized into the cubic structure(Fd3m)further verified via Retvield refinement.The morphology and compositional studies were carried out using field emission scanning electron microscopy(FESEM)and energy dispersive analysis of X-rays(EDAX),respectively.Lattice structure was confirmed via Raman characterization for the prepared samples.The sample formation was further verified through Fourier transform Infra-Red(FTIR)spectroscopy.The dielectric studies reveal the La_(0.9)Na_(0.1)CrO_(3)e13*10^(4)T and Ni_(0.5)Cu_(0.5)Fe_(2)O_(4)e1.83*10^(4)T exhibit high dielectric constant.However,their composites show abrupt drop in dielectric constant.The electric modulus study confirmed that the samples exhibit non-Debye character with spread of relaxation time constants. | M.Saleem Shivani Chouhan A.Mishra | 2019 | Journal of Advanced Dielectrics2019，9，6： | 0 |
| 15 | Low dielectric constant and signature of ferroelectric nature in transition metal(Co,Ni,Cu)-doped Mg_(0.5)Zn_(0.5)Al_(2)O_(4)aluminates显示文摘This paper throws light on the preparation of transition metal-doped Mg_(0.5)Zn_(0.5)Al_(2)O_(4)(x=0,0.05 and TM=Co,Ni,Cu)aluminates via solid-state reaction route.The X-ray diffraction characterization analysis confirmed that all the samples have crystallized into the psuedocubic phase having space group Fd3m and were single phased.The incorporation of transition metals viz.Co^(2+),Ni^(2+),Cu^(2+)in the Mg_(0.5)Zn_(0.5)Al_(2)O_(4)matrix does not result in the appearance of new peaks or any considerable shift in diffraction peaks within the limits of XRD experimentation.This infers homogeneous dispersion of dopants at the Mg-site which is attributed to nearly same ionic radii of the dopants to that of Mg-site in Mg 0:5 Zn0:5 Al 2 O 4.Lattice structure,bonding nature and hence the spinel formation were verified through Raman scattering technique.The compositional verification was carried out via energy dispersive analysis of X-rays(EDAX).The surface morphology and hence the microstructural studies were carried out using field emission scanning electron microscopy(FESEM).The synthesized Mg_(0.5)Zn_(0.5)Al_(2)O_(4)(x=0,0.05 and TM=Co,Ni,Cu)aluminate samples were tested for polarization studies keeping their insulating nature into consideration and they displayed a sign of well-behaved P-E loop. | M.Saleem M.Padole A.Mishra | 2019 | Journal of Advanced Dielectrics2019，9，4： | 0 |
| 16 | Mn_(0.8)Zn_(0.2)Fe_2O_4 nanoparticulates spinel ferrites:An approach to enhance the antenna field strength for improved magnitude versus offset(MVO)显示文摘Electromagnetic signals in deep reservoir are very weak so that it is difficult to predict about the presence of hydrocarbon in seabed logging(SBL) environment.In the present work,Mn0.8Zn0.2Fe2O4 nanoferrites were prepared by a sol–gel technique at different sintering temperatures of450 °C,650 °C and 850 °C to increase the strength of electromagnetic(EM) antenna.XRD,FESEM,Raman spectroscopy and HRTEM were used to analyze the phase,surface morphology and size of the nanoferrites.Magnetic properties of the nanoferrites were also measured using an impedance network analyzer.However,nanoferrites sintered at 850 °C with initial permeability of 200 and Q factor of 50 were used as magnetic feeders with the EM antenna.Lab scale experiments were performed to investigate the effect of magnetic field strength in scale tank.SPSS and MATLAB softwares were also used to confirm the oil presence in scale tank.It was observed that the magnitude of the EM waves for the antenna was increased up to 233%.Finally,the correlation values also show 208% increase in the magnetic field strength with the presence of the oil.Therefore,antenna with Mn0.8Zn0.2Fe2O4 nanoferrites based magnetic feeders can be used for deep water and deep target hydrocarbon exploration. | Majid Niaz Akhtar Nadeem Nasir Muhammad Kashif Noorhana Yahya Mukhtar Ahmad Ghulam Murtaza Muhammad Azhar Khan M.H.Asif A.Sattar R.Raza M.Saleem S.N.Khan | 2014 | Progress in Natural Science:Materials International2014，24，4： | 0 |
| 17 | Humidity sensing properties of CU_2O-PEPC nanocomposite films显示文摘A blend of copper oxide nanopowder(Cu_2O),3 wt.%,and poly-N-epoxypropylcarbazole(PEPC), 2 wt.%,in benzol was drop-casted on glass substrates with pre-deposited surface-type silver electrodes for the fabrication of Cu_2O-PEPC nanocomposite thin films.The thicknesses of the Cu_2O-PEPC films were in the range of 10-13μm.The effect of humidity on the electrical properties of the nanocomposite films was investigated by measuring the capacitance and dissipation of the samples at two different frequencies of the applied voltage:120 Hz and 1 kHz.The AC resistance of the samples was determined from the dissipation values,and the DC resistance was measured directly.The effect of ageing on the humidity sensing properties of the nanocomposite was observed. After ageing,it was observed that at 120 Hz and 1 kHz,under a humidity of up to 86%RH,the capacitance of the cell increased by 85 and 8 times,and the resistance decreased by 345 and 157 times,accordingly,with respect to 30%RH conditions.It was found that with an increase in frequency,the capacitance and resistance of the samples decreased.It is assumed that the humidity response of the cell is associated with the diffusion of water vapors and doping of the semiconductor nanocomposite by water molecules. | Kh.S.Karimov M.Saleem Z.M.Karieva A.Mateen M.Tariq Saeed Chani Q.Zafar | 2012 | Journal of Semiconductors2012，33，7： | 0 |
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