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| 1 | 乳液催化剂存在下空气辅助甲酸氧化法使油品脱硫(英文)显示文摘Catalytic oxidative desulfurization(ODS) of model oil and commercial oil samples was investigated using an air-assisted performic acid oxidation system with a phase transfer or emulsion catalyst comprising a quaternary ammonium salt-based heteropolyoxometalate.Different emulsion catalysts with a Keggin type heteroployoxometalate anion(containing W,Mo,and V) and cetyltrimethylammonium bromide cation were prepared and characterized by X-ray fluorescence,Fourier transform infrared spectroscopy,and scanning electron microscopy.[C16H33N(CH3)3]3[PW9Mo3O40] was the most effective catalyst in the current oxidation system,which reduced the sulfur content of the model oil from 1275 μg/g to 57 μg/g.The reactivity order of different model sulfur compounds was thiophene < dibenzothiophene < 4,6-dimethyldibenzothiophene. The ODS of model sulfur compounds followed first order kinetics with apparent activation energy from 29 to 27 kJ/mol.The catalysts also performed efficiently in the ODS of the industrial oil samples,including untreated naphtha,light gas oil,heavy gas oil,and Athabasca oil sands derived bitumen,for which sulfur removal rates were 83%,85%,68% and 64%,respectively. | Ahmad Imtiaz Ahmad Waqas Ishaq Muhammad | 2013 | 催化学报2013，34，10： | 4 |
| 2 | Doping Induced Tailoring in the Morphology,Band-Gap and Ferromagnetic Properties of Biocompatible ZnO Nanowires, Nanorods and Nanoparticles显示文摘The modification of nanostructured materials is of great interest due to controllable and unusual inherent properties in such materials. Single phase Fe doped Zn O nanostructures have been fabricated through simple, versatile and quick low temperature solution route with reproducible results. The amount of Fe dopant is found to play a significant role for the growth of crystal dimension. The effect of changes in the morphology can be obviously observed in the structural and micro-structural investigations, which may be due to a driving force induced by dipole-dipole interaction. The band gap of Zn O nanostructures is highly shifted towards the visible range with increase of Fe contents, while ferromagnetic properties have been significantly improved.The prepared nanostructures have been found to be nontoxic to SH-SY5 Y Cells. The present study clearly indicates that the Fe doping provides an effective way of tailoring the crystal dimension, optical band-gap and ferromagnetic properties of Zn O nanostructure-materials with nontoxic nature, which make them potential for visible light activated photocatalyst to overcome environmental pollution, fabricate spintronics devices and biosafe drug delivery agent. | Javed Iqbal Tariq Jan Yu Ronghai Sa jjad Haider Naqvi Ishaq Ahmad | 2014 | Nano-Micro Letters2014，6，3： | 2 |
| 3 | Optical absorption of ion irradiated multi-walled carbon nanotube sheets in the visible to terahertz ranges显示文摘Optical absorption of Ar and H ion beam irradiated multi-walled carbon nanotube (MWCNT) sheets at various doses in the visible and terahertz spectral ranges was investigated.It was found that the optical absorption of MWCNT sheets in the visible range was decreased with increasing ion irradiation dose.Similar behavior was observed in terahertz range,where the optical absorption of MWCNT sheets in the range of 0 to 1.5 THz was also decreased with increasing ion irradiation dose.The optical absorption decreases in irradiated MWCNT sheets can be ascribed to the increase of defects in the irradiated MWCNTs. | ISHAQ Ahmad YAN Long HE Suixia ZHU Dezhang ZHOU Xingtai | 2009 | Nuclear Science and Techniques2009，20，4： | 2 |
| 4 | Bioaccumulation of metals in human blood in industrially contaminated area显示文摘Heavy metals were analyzed in different foods crops, milk, meat and blood samples collected from different age group subjects such as children (1-12 years), adolescent (12-18 years), adults (18-45 years) and old age (above 45 and 55 years for males and females, respectively) from polluted and relatively less polluted areas. The results revealed that the consumption of contaminated food crops, meat and milk have significantly increased the concentrations of selected metals in the human blood. Cu, Zn and Mn concentrations were significantly higher (p < 0.05) in the blood samples collected from the polluted area as compared to control area. Old people had accumulated high concentrations of metals as compared to the younger ones within the same area. Males accumulated higher concentrations of metals as compared to females. | F. Akbar Jan M. Ishaq S. Khan M. Shakirullah S. M. Asim I. Ahmad Fazal Mabood | 2011 | Journal of Environmental Sciences2011，23，12： | 2 |
| 5 | Spectral Characterization of Liquefied Products of Pakistani Coal 显示文摘 | Khan M A Ahmad I Ishaq M | 2004 | Fuel Process Technol2004，85，1： | 1 |
| 6 | Oxidative desulphurization study of gasoline and kerosene显示文摘 | M. Shakirullah Waqas Ahmad Imtiaz Ahmad M. Ishaq | 2010 | Fuel Processing Technology2010，，11： | 1 |
| 7 | Synthesis,static,and dynamic light scattering studies of soluble aromatic polyamide显示文摘 | ZULFIQAR S ISHAQ M AHMAD Z | 2008 | Polymers for Advanced Technologies2008，19，9： | 1 |
| 8 | Synthesis,static,and dynamiclight scattering studies of soluble aromatic polyamide显示文摘 | Zulfiqar S Ishaq M Ahmad Z | 2008 | Polymer for Ad-vanced Technology2008，19，： | 1 |
| 9 | Optimal Scheme Selection of Agricultural Production Structure Adjustment——Based on DEA Model; Punjab(Pakistan)显示文摘This paper used the modern evaluation method of DEA(Data Envelopment Analysis) to assess the comparative efficiency and then on the basis of this among multiple schemes chose the optimal scheme of agricultural production structure adjustment. Based on the results of DEA model, we dissected scale advantages of each discretionary scheme or plan. We examined scale advantages of each discretionary scheme, tested profoundly a definitive purpose behind not-DEA efficient, which elucidated the system and methodology to enhance these discretionary plans. At the end, another method had been proposed to rank and select the optimal scheme. The research was important to guide the practice if the modification of agricultural production industrial structure was carried on. | Zeeshan Ahmad Meng Jun Muhammad Abdullah Mazhar Nadeem Ishaq Majid Lateef Imran Khan | 2015 | Journal of Northeast Agricultural University(English Edition)2015，22，4： | 1 |
| 10 | Aromatic-aliphatic polyam- ide/montmorillonite clay nanocomposite materials: Synthesis, nanostructure and properties显示文摘 | Zulfiqar S Ahmad Z Ishaq M | 2009 | Materials Science Engineer- ing A2009，525，12： | 1 |
| 11 | Aromatic-aliphatic polyamide/montmorillonite clay nanocomposite materials: Synthesis, nanostructure and properties显示文摘 | Zulfiqar S Ahmad Z Ishaq M | 2009 | Materials Science and Engineering: A2009，525，： | 1 |
| 12 | Aromatic-aliphatic polyamide/montmorillonite clay nanocomposite materials:Synthesis, nanostructure and properties显示文摘 | Zulfiqar S Zahoor Ahmad Muhammad Ishaq | 2009 | Materials Science and Engineering:A2009，525，12： | 1 |
| 13 | Ar离子束辐照下多壁碳纳米管网络的导电性增强显示文摘用Ar离子束辐照800K高温下的多壁碳纳米管(MWCNT)网络,注量为2×1016/cm2时,MWCNT网络的导电性提高~80%。实验结果表明,离子束辐照可通过在多壁碳纳米管间的引入连接改善多壁碳纳米管间的电学接触,制备高导电性的透明碳纳米管网络。 | 周广颖 闫隆 Ishaq Ahmad 何绥霞 周兴泰 | 2010 | 核技术2010，33，11： | 0 |
| 14 | Roadside dust contamination with toxic metals along industrial area in Islamabad, Pakistan显示文摘An investigation has been carried out to understand the contamination characteristics of roadside dust in the industrial area of Islamabad, Pakistan. The amounts of Si, S, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Pb,Zn, Ga, As, Se and Cd were determined from 95 roadside dust samples collected along the Islamabad industrial area using Proton Induced X-ray Emission(PIXE). The results indicated that concentrations of all elements,except Cd, in the roadside dust were significant. The results of the enrichment factor show that the elementary composition of the roadside dust could be categorized as soil elements from the crust of the earth and elements from anthropogenic pollution. The high enrichment factors imply that elements such Cr, Cu, Pb, Zn, As, Se,Cd, Ni, Co and S came from anthropogenic activities. The source of metal contamination was identified using multivariate statistical analysis. It has been concluded that Ca, Sc, Ti, V, Mn and Fe mainly originate from crustal sources; Cr, Cu, Ni, Pb, Zn and Ga are associated with point-sources from industrial pollution/traffic;and S, Cl, K, As and Se are mainly related to oil/coal combustion. | Waheed Akram Morgan Madhuku Kashif Shahzad Ali Awais Ishfaq Ahmad Muhammad Arif Ishaq Ahmad | 2014 | Nuclear Science and Techniques2014，25，3： | 0 |
| 15 | 质子束轰击下MWCNTs无定形结构的转变显示文摘在室温下用70keV质子束多壁碳纳米管(MWCNTs),研究了多壁碳纳米管从石墨结构向无定形结构的转变过程。轰击后,MWCNTs外围的石墨结构变成均匀的无定形结构包覆着内部的石墨结构。增大照射量,这种无定形化的过程继续向MWCNTs内层推进,直至形成一个中空的无定形纳米线结构。质子束轰击引入的MWCNTs的结构转变,是从外层向内层逐步推进的石墨结构向无定形结构的转变过程。本文对这种结构演化的机理进行了讨论。 | 闫隆 周广颖 Ahmad Ishaq 何绥霞 巩金龙 朱德彰 | 2010 | 核技术2010，33，1： | 0 |
| 16 | Bauxite washing for the removal of clay显示文摘Clay impurities associated with bauxite negatively affect the Bayer process for alumina production. These impurities should be removed as far as possible by a beneficiation technique before the ore is used as feed for the Bayer process. In this current investigation, bauxite washing was conducted in the laboratory. Bauxite washing is a physical process that causes the disintegration and deagglomeration of the clay matrix, and bauxite is liberated from the clay(mainly rich in silica). Subsequently, separation occurs with the assistance of wet screening at a predetermined cut size. Three techniques were investigated in the laboratory: drum washing, water-jet washing, and ultrasonic washing. Various operating parameters were investigated for drum washing and water-jet washing, including materials retention time, drum rotation speed, solid concentration, water-jet spray duration, pressure, and height. We concluded that the retention time of bauxite inside the drum at a solid concentration of 55wt% and a drum rotation speed of 31 r/min is the dominant parameter for the removal of clay from the bauxite surface. | Ishaq Ahmad Ernst-Ulrich Hartge Joachim Werther Reiner Wischnewski | 2014 | International Journal of Minerals,Metallurgy and Materials2014，21，11： | 0 |
| 17 | The charge state distribution of B, C, Si, Ni, Cu and Au ions on 5 MV pelletron accelerator显示文摘Stripper gas and terminal potential play a key role for the charge state distribution in a tandem pelletron accelerator. The knowledge of this distribution is important for experiments performed on tandem accelerators. The charge state distribution of B, C, Si, Ni, Cu and Au beams is measured by using Ar as stripper gas, and terminal potential is varied from 0.3 to 3.0 MV on 5UDH-2 tandem pelletron accelerator installed at the National Centre for Physics, Islamabad. The individual charge state is measured after the switching magnet at 15° in high-energy portion. It is observed that the higher charge states are stable in the range of lower and middle atomic masses of periodic table, whereas higher atomic mass(Au) shows beam current instability in higher charge states. For carbon,the charge distribution at 1.7 MV terminal potential by varying stripper gas pressure is also studied, which resulted in decreased overall transmission with good current value for higher charge states. | Ali Awais Javaid Hussain Muhammad Usman Waheed Akram Kashif Shahzad Turab Ali Ishaq Ahmad Malik Maaza | 2017 | Nuclear Science and Techniques2017，28，5： | 0 |
| 18 | Diagnosis and Recommendation Integrated System Assessment of the Nutrients Limiting and Nutritional Status of Tomato显示文摘Tomato is an important field crop,and nutritional imbalances frequently reduce its yield.Diagnosis and Recommendation Integrated System(DRIS),uses ratios for nutrient deficiency diagnosis instead of absolute concentration in plant tests.In this study,local DRIS norms for the field tomatoes were established and the nutrient(s)limiting tomatoes yield were determined.Tomato leaves were analyzed for nutrients,to identify nutritional status using the DRIS approach.One hundred tomatoes fields were selected from Chatter Plain Khyber Pakhtunkhwa and the Sheikupura Punjab Pakistan.The first fully matured leaf was sampled,rinsed,dried and ground for analyzing P,K,Ca,Mg,Cu,Fe,Mn and Zn using an Inductively Coupled Plasma Atomic Emission Spectrophotometer(ICP AES).Plant tissue N and S were measured by the combustion method.The tomatoes yields were recorded at each location.The data were divided into high-yielding(≥3.79 kg/10 plant)and low-yielding(<3.79 kg/10 plant)populations and norms were computed using standard DRIS procedures.High-yielding plant population had a statistically greater mean S and Fe than the low-yielding population.The average balance index,the sum of functions,for S and Fe were−11.04 and−5.17 which reflected deficiency of S and Fe.Plant nutrients norms established may optimize plant nutrition in field tomatoes for high yield. | Rabia Manzoor Mohammad Saleem Akhtar Khalid Saifullah Khan Taqi Raza Muhammad Ishaq Asif Rehmani Carl Rosen Muhammad Khalil ur Rehman Nahla Zidan Fahad MAlzuaibr Nisreen MAbdulsalam Najla AKhateeb Majid Alhomrani Abdulhakeem SAlamri Javeed Ahmad Lone Muhammad Ammar Raza Ayman El Sabagh | 2022 | Phyton-International Journal of Experimental Botany2022，91，12： | 0 |
| 19 | Structural and optical analysis of Cr_2N thin films prepared by DC magnetron sputtering显示文摘Chromium nitride(Cr2N) thin films were prepared by a DC magnetron sputtering technique. The deposition temperature was raised from 50 to 300°C, and its influence on the film structure and refractive index was investigated. X-ray diffraction analysis shows that the crystalline structure of the films transforms from the(101) to(002) oriented hexagonal Cr2 N phase as the increase of substrate temperature above 50°C, and a highly textured film grows at 100°C. An empirical relation between the crystalline orientation and infrared active modes of the films is obtained, i.e., the Fourier transform infrared(FTIR) spectrum of the film prepared at 50°C exhibits only A1(TO) mode. The prominent peak in the FTIR spectra of the film prepared above 50°C is assigned to the E1(TO) mode and is correlated with the(002) or c-axis oriented hexagonal wurtzite phase of Cr2 N. In the surface analysis of atomic force microscopy, a transformation from the featureless surface to columnar-type morphology is observed with the increase of substrate temperature from 50 to 100°C, exhibiting c-axis oriented crystallite growth. A further increase in substrate temperature to 200°C causes the c-axis crystallites to merge, resulting in the formation of voids. The refractive index(n) of the deposited films is obtained using spectroscopic ellipsometry. | Shakil Khan A.Mahmood A.Shah Qaiser Raza Muhammad Asim Rasheed Ishaq Ahmad | 2015 | International Journal of Minerals,Metallurgy and Materials2015，22，2： | 0 |
| 20 | Differential elastic scattering cross sections of protons from Al in 2.4–4.8 MeV energy range显示文摘Measurement of differential elastic cross section of protons from aluminum was taken at 165° degree in the2.4–4.8 Me V energy range. The results and measured energy resonances were compared with reported measurements.These data will improve the reliability of backscattering analysis of Al with protons in this energy region. | Kashif Shahzad Faisal J. Qureshi Javeria Taj Ali Awais Javaid Hussain Waheed Akram Shehla Honey Ishaq Ahmad Maaza Malik | 2016 | Nuclear Science and Techniques2016，27，2： | 0 |
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