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Response of Yield and Related Attributes of Upland Cotton to Weather Variables

American Journal of Plant Sciences 2017年第7期8卷 1711-1720页

作者： Kalim Ullah Muhammad Idrees Khan Zahid Mahmood toheed iqbal Saeed Muhammad Hafiz Abdul Haq Aftab Ahmad Sabahat Hussain The PCCC Cotton Research Station Dera Ismail Khan Pakistan The PCCC Central Cotton Research Institute Multan Pakistan Agricultural Research Institute Ratta Kulachi Dera Ismail Khan Pakistan Global Change Impact Study Centre Islamabad Islamabad Pakistan

Cotton growth and development is effected by various ecological issues like temperature fluctuations, distribution and quantity of rainfall, relative humidity and winds which are the climate change attributes. A field experiment was carried out to find out the response of cotton to weather variables in terms of total variation in yield and quality. The effect of planting times and thermal temperatures (cumulative heat units) on yield of 4 cotton cultivars viz;CIM-600, CIM-616, CIM-622 & CRIS-641 was evaluated. Plants were sown on 6 planting times during the year 2015-2016 and 2016-2017 in an experiment conducted in randomized complete block design having three replications. Cotton cultivars depicted significant variances for number of bolls plant-1, boll weight and seed cotton yield. The cultivar CIM-616 depicted the highest seed cotton yield of 2083.60 kg·ha-1 on interpretation of highest bolls and boll weight. Maximum seed cotton yield was noted in planting time from 1st April to 15th April whereas early and late planting decreases the seed cotton yield on account of less accretion of cumulative heat units. Regression analysis depicted that rise of one unit (15 days) from early to optimal date (15th March to 15th April) enhanced the seed cotton yield by 93.76 kg·ha-1 (y = -93.764x2 + 521.04x + 1364). Delayed planting also reduces the seed cotton yield with the same ratio. It is therefore established that cotton must be cultivated from 1st April to 1st May to harvest good production in this type of climate.

关键词： G. hirsutum Planting Time Cumulative Heat Units Cotton Cultivars

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Biosorption characteristics of unicellular green alga Chlorella sorokiniana immobilized in loofa sponge for removal of Cr(Ⅲ)

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Journal of Environmental Sciences 2008年第2期20卷 231-239页

作者： AKHTAR Nasreen iqbal Muhammad ZAFAR Saeed iqbal iqbal Javed Department of Biology Government lslamia College for WomenCooper RoadLahore-54550Pakistan. Environment Biotechnology Group Biotechnology and Food Research CentrePCSIR Laboratories ComplexLahore-54600Pakistan. School of Biological Sciences University of PunjabLahore-54570Pakistan.

Loofa sponge （LS） immobilized biomass of Chlorella sorokiniana （LSIBCS）, isolated from industrial wastewater, was investigated as a new biosorbent for the removal of Cr（Ⅲ） from aqueous solution. A comparison of the biosorption of Cr（Ⅲ） by LSIBCS and free biomass of C. sorokiniana （FBCS） from 10-300 mg Cr（Ⅲ）/L aqueous solutions showed an increase in uptake of 17.79% when the microalgal biomass was immobilized onto loofa sponge. Maximum biosorption capacity for LSIBCS and FBCS was found to be 69.26 and 58.80 mg Cr（Ⅲ）/g biosorbent, respectively, whereas the amount of Cr（Ⅲ） ions adsorbed onto naked LS was 4.97 mg/g. The kinetics of Cr（Ⅲ） biosorption was extremely rapid and equilibrium was established in about 15 and 20 min by LSIBCS and FBCS, respectively. The biosorption equilibrium was well defined by Langmuir adsorption isotherm model. The biosorption kinetics followed the pseudo-second order kinetic model. The biosorption was found to be pH dependent and the maximum sorption occurred at the solution pH 4.0. Desorption studies showed that 98% of the adsorbed Cr（Ⅲ） could be desorbed with 0.1 mol/L HNO3, while other desorbing agents were less effective in the order： EDTA 〉 H2SO4 〉 CH3COOH 〉 HCl. The regenerated LSIBCS retained 92.68% of the initial Cr（Ⅲ） binding capacity up to five cycles of reuse in continuous flow-fixed bed columns. The study revealed that LSIBCS could be used as an effective biosorbent for the removal of Cr（Ⅲ） from wastewater.

关键词： biosorption immobilization loofa sponge Chlorella sorokiniana Cr(Ⅲ) desorption fixed bed column reactor

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Sedimentation retention basin utilization for best management practice

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Journal of Environmental Sciences 2003年第5期15卷 662-668页

作者： Zaheer iqbal CollegeofWaterResourcesandEnvironment

Approaches to the artificial impoundment and theoretical design of sedimentation retention basin are reviewed with particular attention to best management practice(BMP) to control agriculture and surface runoff. Sediments retention basins are the small version of farm pond used where a criteria of farm pond is not met. Such basin traps the pollutants and suspended solids prior to entry into streams and lakes. The study is focused with special reference to the assessment and control of non point source pollution(NPSP) from the sub basin area of Tai Lake in the Xishan County of Wuxi City of China. The author suggested two different approaches to conduct this study including theoretical design for sedimentation retention basin and computation of flow, sediment transport and deposition during the artificial impoundment of retention basin for BMP's utilization. Theoretical design will provide a useful function as a first line defense against the movement of sediments and transport of pollutants into the Tai Lake while the assessment of sediments deposition will help to make its proper use and periodic cleanup.

关键词： agriculture runoff artificial impoundment best management practice sediment retention basin Tai Lake sub basin non point source pollution

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An automated framework for advertisement detection and removal from sports videos using audio-visual cues

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Frontiers of Computer Science 2021年第2期15卷 185-188页

作者： Abeer toheed Ali JAVED Aun IRTAZA Hassan DAWOOD Hussain DAWOOD Ahmed S.ALFAKEEH Department of Software Engineering University of Engineering and Technology-TaxilaTaxila47050Pakistan Department of Computer&Network Engineering University of JeddahJeddah21577Saudi Arabia Information System Department King Abdulaziz UniversityJeddah21577Saudi Arabia

1 Introduction Advertisements detection and replacement with different ads based on the user preferences is employed during sports rebroadcasts that offers more value to both the distributor and *** advertisements detection is a laborious activity and demands an urgent need to develop automated advertisement detection techniques to save the time,storage space,and transmission bandwidth.

关键词： automated visual framework

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Dimeric quinacridone cyclophanes: Synthesis,structures,and photophysical properties

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Science China Chemistry 2011年第2期54卷 314-319页

作者： JAVAD iqbal State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University

Two novel quinacridone (QA) cyclophanes with intrinsic intramolecular dye-dye interactions have been designed and synthesized.X-ray crystal structures as well as detailed photophysical properties have been well *** two dyes have a major advantage that efficient fluorescence quenching can be observed even in their dilute solutions.A comparison of photophysical properties between the dimeric QA cyclophane and its reference monomeric counterpart indicates that the dimerization is predominant for the fluorescence quenching of QA dyes in *** study provided some model QA derivatives with dimeric structures for understanding the fluorescence quenching of QA dyes in solutions.

关键词： quinacridone cyclophanes dye-dye interactions photophysics fluorescence quenching

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Heat Transfer Analysis of MHD Power Law Nano Fluid Flow through Annular Sector Duct

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Journal of Thermal Science 2020年第1期29卷 169-181页

作者： AHMED Farhan iqbal Mazhar School of Natural Sciences National University of Science and Technology

Flow and heat transfer analysis of an electrically conducting MHD power law nano fluid is carried out through annular sector duct,under the influence of constant pressure *** types of nano particles(*** and TiO2)are used in power law nano *** implicit procedure,(SIP)is used to simulate the discretized coupled algebraic *** has been observed that volume fraction of nano particles,ϕand magnetic field parameter,Ha are favourable for the heat transfer rate,however,both resist the fluid *** of applied uniform transverse magnetic field exceeds in the case of shear thickening fluids(i.e.n>1)by increasing the value of Ha as compared to that in shear thinning fluids(i.e.n<1).Therefore,enhancement in heat transfer rate is comparably more in shear thickening ***,comparable limiting case study with published result is also carried out in this research paper.

关键词： electrically conducting power law nano fluid Cu nano particles TiO2 nano particles shear thickening fluid shear thinning fluid heat transfer rate friction factor

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Effect of Minor Alloying on Crystallization Behavior and Thermal Properties of Zr_(64.5)Ni_(15.5)Al_(11.5)Cu_(8.5) Bulk Amorphous Alloy

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Journal of Materials Science & Technology 2011年第6期27卷 534-538页

作者： Muhammad iqbal Javed iqbal Akhter Haifeng Zhang Zhuangqi Hu MicrostructuralStudies Group Physics Division Pakistan Institute of Nuclear Science and Technology (PINSTECH) P.O. Nilore Islamabad Pakistan Shenyang Nationel Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Minor alloying plays an important role in the synthesis and improvement of thermal stability of bulk metallic glasses（BMGs）.The present study was conducted to investigate the effect of minor additions of Y,Ti and Nb on the crystallization behavior and the thermal properties of Zr64.5Ni15.5Al11.5Cu8.5 *** parameters and the activation energies for crystallization were calculated for four（Zr0.645Ni0.155Al0.115-Cu0.085）100-xMx（M=Y,Ti and Nb,while x=0,2 at.） *** present alloys have wide supercooled liquid region of ≥87 *** activation energy was found to be greater than 300 kJ/mol for the base *** crystalline phases were identified in the samples annealed at 823 K for 20 *** glass transition temperature（Trg） and other thermal parameters such as γ,δ and β were improved by Y and Ti *** addition resists crystallization below annealing temperature 713 K,however,its effect on thermal properties is not very promising.

关键词： Activation energy Thermal properties Glass-forming ability Thermal stability Precipitation Microstructure

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Appraisal of Biofertilizers in Rice: To Supplement Inorganic Chemical Fertilizer

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Rice science 2018年第6期25卷 357-366页

作者： Haider iqbal KHAN C 36 Gateway Building The University of Nottingham Sutton Bonington Campus

A field experiment was carried out to evaluate the feasibility of inoculating rice seedlings with biofertilizers(Azospirillum and Trichoderma) in order to reduce the use of chemical inorganic nitrogen(N)fertilizer on rice variety BU Dhan 1. The plant performances were better when 25% less inorganic N was applied with Trichoderma and combined application of Trichoderma and Azospirillum. Plants contained the highest chlorophyll concentrations when they were treated with 75% N + Trichoderma. Considering the yield attributes, 75% N + Trichoderma and 75% N + Trichoderma + Azospirillum performed similar to the control. The grain yield of rice was similar to the recommended dose even with 25% less N application. Application of Trichoderma resulted higher yield, followed by combined application with Azospirillum. Results revealed the greater scope of applying biofertilizer(Trichoderma) to supplement chemical N fertilizer with optimum yield of rice.

关键词： Azospirillum biofertilizer inorganic chemical fertilizer rice Trichoderma nitrogen

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Photodetachment of H^- near a hard wall with arbitrary laser polarization direction

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Chinese Physics B 2015年第8期24卷 286-290页

作者： Azmat iqbal A.Afaq Department of Physics COMSATS Institute of Information Technology Centre of Excellence in Solid State Physics University of the Punjab New Campus

The photodetachment of H-near a hard wall is investigated with linear polarized laser light travelling in arbitrary direction θL with respect to the z axis. An analytical formula for the total cross section is derived using semi-classical closed orbit theory, which consists of two terms, i.e., the smooth background term and the oscillatory term with an extra factor 2(θL). This factor controls oscillations in the total photodetachment cross section. The amplitude of oscillation is maximum at θL = 0 when the laser polarization direction is perpendicular to the wall and it approaches zero at θL = π /2when the laser polarization direction is parallel to the wall. It is also observed that the total cross section depends on the source–wall distance and it reduces to a free space case when the wall is at infinite distance from the source.

关键词： quantum interference photodetachment process hard wall closed orbit theory

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Ordering and disordering of in situ grown MgAl-layered double hydroxide and its effect on the structural and corrosion resistance properties

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International Journal of Minerals,Metallurgy and Materials 2019年第12期26卷 1570-1577页

作者： Muhammad Ahsan iqbal Michele Fedel Department of Industrial Engineering University of Trento

A MgAl-layered double hydroxide(MgAl-LDH)protective film was developed on AA6082 substrates via the in situ hydrothermal growth method to obtain a distinct cauliflower-like LDH structure,and coated substrates were further heat-treated in air at temperatures from 100 to 250℃ to further improve the corrosion resistance of MgAl-LDH by taking advantage of the LDH memory effect;also,the effect of calcination on MgAl-LDH structural stability and the corresponding corrosion resistance properties were *** structural characterization of uncalcined and calcined LDH films were examined using scanning electron microscopy,energy-dispersive spectroscopy,X-ray diffraction,thermogravimetric analysis,differential scanning calorimetry,and Fourier transform infrared *** corresponding corrosion protection efficiency of the developed coating was studied through potentiodynamic polarization experiments and by electrochemical impedance *** with uncalcined MgAl-LDH,the calcined film showed a relatively lower corrosion current density and a higher impedance value,especially after heat treatment at 250℃.The findings demonstrate that calcination strongly affects the oriented growth of the LDH and causes an increase in the surface area and contraction of the basal spacing,which in turn caused a compact structure that substantially influenced the LDH corrosion resistance properties.

关键词： layered double hydroxide calcination in situ growth thin films corrosion protection

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