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On the roads to H1N1 pandemic era:drive safe and fearless using colour-coded masks

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Asian Pacific Journal of Tropical Medicine 2012年第4期5卷 333-334页

作者： M shahid Department of Microbiology Immunology & Infectious DiseasesCollege of Medicine & Medical SciencesArabian Gulf UniversityKingdom of Bahrain Section of Antimicrobial Resistance Research and Molecular Biology Department of MicrobiologyJawaharlal Nehru Medical College & HospitalAligarh Muslim UniversityAligarh-202002Uttar PradeshIndia

Notwithstanding the end of 2009 H1N1 pandemic,the threat for its revisit still persists and WHO has warned to remain *** that lime the situation was more panicky than *** this article,a suggestion to minimize the panic is provided by the usage of colour-coded masks and is proposed hereby as a "population segregation" approach in case of the revisit of HlNl or similar threatening respiratory viral infections.

关键词： H1N1 Respiratory viral infections Colour-coded masks Population segregation Public health

Total Fragmentation Cross Section of 158A GeV Lead Projectiles in Cu Target

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Chinese Physics Letters 2008年第9期25卷 3208-3211页

作者： Mukhtar Ahmed Rana shahid Manzoor Physics Division Directorate of Science PINSTECH PO Nilore Islamabad Pakistan

Total fragmentation cross section for the reaction 158A Pb ions ＋ Cu target is measured using the most sensitive track detector CR-39. Measured values are compared with calculations. Exposures of target-detector stack with 158A P5 projectiles are made at CERN-SPS beam facility. Results of calibration of CR-39 detector in a charge region （63 ≤ Z ≤ 83） are also reported, which can be used for high energy particle identification using CR-39 and in determination of partial charge changing cross sections. The charge resolution δz achieved by this technique is about 0.2e. A systematic dependence of total fragmentation cross section on target properties is revealed and the corresponding results are presented.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Broadband Access:Technologies,Drivers,and Issues

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China Communications 2007年第4期4卷 23-32页

作者： Muhammad Khalil shahid School of Economics and Management Beijing University of Posts and Telecommunications

Economic research shows that public infrastructure investment is a powerful driver of business productivity,investment,and economic *** paper discusses the drivers for broadband and analyses the various broadband access technologies and their respective market *** policy and regulatory issues are also *** access,along with its extended value-added services and applications,has now become the most important growth driver for fixed *** Subscriber Line(DSL) is the leading access technology due to already available copper infrastructure and WiMAX is emerging new technology,especially in Asia/Pacific(APAC) region,due to its speedy and low cost infrastructure deployment characteristics. Countries with high penetration of broadband users such as South Korea,Japan and Canada have all implemented conscious policies for the growth of broadband in their *** in APAC region,especially the developing countries,will have to play the leading role for broadband due to its importance in economic and social growth.

关键词： Broadband access DSL WiMAX APAC region

A framework for coupled consolidation-desiccation behaviour of clay slurries

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International Journal of Mining Science and Technology 2018年第2期28卷 275-280页

作者： Faseel S.Khan shahid Azam Faculty of Engineering and Applied Science University of Regina

A framework is proposed to understand coupled consolidation-desiccation in clay slurries using effective stress and soil suction as state variables. Constitutive surfaces were derived from best-fit equations for reference curves where one state variable was kept at 1 kPa and the other was varied up to 10~6 *** indicated that volume compressibility comprises of apparent pre-consolidation up to 100 kPa beyond which a single best-fit curve is valid. Similarly, the theoretical virgin compression line(specific gravity dependant), indicated that both state variables have the same effect up to the air entry value(1000 kPa at a void ratio of 1.8) beyond which void ratio reduces more readily under effective stress than under soil suction. Likewise, hydraulic conductivity remained saturated up to the air entry value and varied from 10^(-9)m/s to 10^(-12)m/s. Finally, the unsaturated hydraulic conductivity correlated well with empirical relationship up to 10^(-14) m/s bevond which vapor flow became dominant.

关键词： Clay slurries Volume compressibility Hydraulic conductivity Constitutive surfaces

Fungicide tolerant Bradyrhizobium japonicum mitigate toxicity and enhance greengram production under hexaconazole stress

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Journal of Environmental Sciences 2019年第4期31卷 92-108页

作者： Mohammad shahid Mohd.Saghir Khan Department of Agricultural Microbiology Faculty of Agricultural SciencesAligarh Muslim University

Bacterial strain RV9 recovered from greengram nodules tolerated 2400 μg/mL of hexaconazole and was identified by 16 S rDNA sequence analysis as Bradyrhizobium japonicum(KY940048). Strain RV9 produced IAA(61.6 μg/mL), ACC deaminase(51.7 mg/(protein·hr)), solubilized TCP(105 μg/mL), secreted 337.6 μg/mL EPS, and produced SA(52.2 μg/mL) and 2,3-DHBA(28.3 μg/mL). Exopolysaccharides produced by strain RV9 was quantified and characterized by SEM, AFM, EDX and FTIR. Beyond tolerance limit,hexaconazole caused cellular impairment and reduced the viability of strain RV9 revealed by SEM and CLSM. Hexaconazole distorted the root tips and altered nodule structure leading thereby to reduction in the performance of greengram. Also, the level of antioxidant enzymes, proline, TBARS, ROS and cell death was increased in hexaconazole treated *** images revealed a concentration dependent increase in the characteristic green and blue fluorescence of hexaconazole treated roots. The application of B. japonicum strain RV9 alleviated the fungicide toxicity and improved the measured plant characteristics. Also,rhizobial cells were localized inside tissues as revealed by CLSM. Colonization of *** strain RV9 decreased the levels of CAT, POD, APX, GPX and TBARS by 80%, 5%,13%, 13% and 19%, respectively over plants grown at 80 μg/(hexaconazole·kg) soil. The ability to detoxify hexaconazole, colonize plant tissues, secrete PGP bioactive molecules even under fungicide pressure and its unique ability to diminish oxidative stress make *** an attractive choice for remediation of fungicide polluted soils and to concurrently enhance greengram production under stressed environment.

关键词： Hexaconazole toxicity Greengram Bradyrhizobium japonicum Cellular damage Nodule ultrastructure Oxidative stress

Origin of Ferromagnetism in Al and Ni Co-doped ZnO Based DMS Materials

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Chinese Physics Letters 2012年第10期29卷 155-157页

作者： Murtaza Saleem Saadat A.Siddiqi shahid M.Ramay shahid Atiq Shahzad Naseem Centre for Solid State Physics University of the PunjabQuaid-e-Azam CampusLahore 54590Pakistan 2Interdisciplinary Research Centre in Biomedical MaterialsCOMSATS Institute of Information TechnologyDefence RoadOff Raiwind RoadLahorePakistan 3Department of Chemical EngineeringCollege of EngineeringKing Saud UniversityP.O.Box 800Riyadh 11421Saudi Arabia

Zn0.95Ni0.05O and Zn0.90Ni0.05Al0.05O compositions of nanocrystallites are synthesised using the well recognised auto-combustion *** x-ray diffraction patterns demonstrate the phase pure characteristic wurtzite-type crystal structure with space group P63mc in both the *** elemental incorporation of Ni and Al contents into the ZnO structure is confirmed by energy dispersive x-ray *** micrographs of scanning electron microscopy show an approximate ordered *** electrical resistivity is observed to decrease with the rising temperature,depicting the characteristic semiconductor behaviour of the *** lower values of resistivity and ferromagnetic interactions in the Al-doped sample correspond to an increase of carrier's *** is observed that the carrier mediated mechanism is mainly responsible for ferromagnetism in ZnO-based diluted magnetic semiconductors.

关键词： resistivity diluted Origin

Bivariate joint distribution analysis of the flood characteristics under semiparametric copula distribution framework for the Kelantan River basin in Malaysia

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Journal of Ocean Engineering and Science 2021年第2期6卷 128-145页

作者： shahid Latif Firuza Mustafa Department of Geography University of MalayaKuala Lumpur 50603Malaysia

Flood is becoming the severe hydrologic issue at the Kelantan River basin in *** joint distribution analysis amongst multiple interacting flood characteristics,i.e.,flood peak discharge flow,volume,and duration series usually provide a comprehensive understanding of the hydrologic risk assessments through visualizing the multivariate exceedance probability or return *** traditional copulas-based methodology is frequently employed under parametric settings where parametric family functions are often employed to model univari-ate marginal distribution before capturing their dependence ***,no universal rules and literature are imposed to model any flood vectors through any fixed or predefined density function,which would follow the different distribution and needs to model by fitting most parsimonious ***,the copula function already relaxes the restriction of selecting marginal distributions from the same distribution ***,incorporation of non-parametric kernel density estimations or KDE would be much stable and less biased smoothing alternatives than the parametric *** this literature,the semi-parametric copula-based methodology is incorporated,where the flood marginals are modelled under the kernel functions and applied as a case study for 50 years annual maximum(AM)flood samples of the Kelantan River basin at the Gulliemard Bridge gauge station in *** Archimedean families copulas(i.e.,Frank,Gumbel and Clayton)and Elliptical copula(i.e.,Gaussian copula)are tested,and thus best-fitted copulas are employed to model the bivariate joint distribution amongst flood characteristics,and which further employed to derive joint and conditional return periods.

关键词： Flood Kelantan River basin Semiparametric Copulas framework Nonparametric marginal distribution Kernel density estimation Return periods

Exact Solutions of Schrdinger Equation for the Position-Dependent Effective Mass Harmonic Oscillator

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Communications in Theoretical Physics 2014年第12期61卷 790-794页

作者： Naila Amir shahid Iqbal School of Natural Sciences National University of Sciences and Technology

A one-dimensional harmonic oscillator with position-dependent effective mass is studied. We quantize the oscillator to obtain a quantum Hamiltonian, which is manifestly Hermitian in configuration space, and the exact solutions to the corresponding Schr¨odinger equation are obtained analytically in terms of modified Hermite *** is shown that the obtained solutions reduce to those of simple harmonic oscillator as the position dependence of the mass vanishes.

关键词： nonlinear harmonic oscillator position-dependent effective mass system Schr¨odinger equation modified Hermite polynomials

Identification of an S5^n allele in Oryza rufipogon Griff. and its effect on embryo sac fertility

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Chinese Science Bulletin 2010年第13期55卷 1255-1262页

作者： shahid Muhammad Qasim Provincial Key Laboratory of Plant Molecular Breeding South China Agricultural University

Oryza rufipogon exhibits abundant genetic diversity and contains many elite genes. In this work, a total of 441 accessions of O. rufipogon were genetically examined using the functional marker S5n, revealing that 18 accessions carried the S5n allele with a heterozygous genotype (S5nS5i/j). Of these accessions, 14 were from Guangdong Province, 2 from Guangxi Zhuang Autonomous Region, 1 from Hainan Province and 1 from Jiangxi Province. Further sequence analysis spanning both sides of the deletion in S5n allele of O. rufipogon confirmed that this allele is identical with that of 02428, a wide-compatibility variety of domesticated rice. The segregation ratio of the 3 genotypes (S5iS5i/S5jS5j:S5nS5i/j:S5nS5n) among 15 self-bred progenies of O. rufipogon significantly deviated from the Mendelian expectation (1:2:1) in that the proportion of plants exhibiting S5n heterozygous and homozygous genotypes was much lower in the progeny. Sequence analysis of full-length S5n alleles indicated that a few base pairs were different between O. rufipogon and O. sativa, and it was presumed that S5n may be an ancient allele. The fertility of the embryo sac in plants with an S5n heterozygous genotype was low, suggesting the existence of other genes controlling embryo sac fertility in the wild rice.

关键词：普通野生稻等位基因胚囊广西壮族自治区鉴定序列分析遗传多样性广亲和品种