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- 저자 : Muhammad Imran Malik (검색결과 6 건)
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Muhammad Hasnain,Imran Ghani,Muhammad Fermi Pasha,Ishrat Hayat Malik,Shahzad Malik 한국인터넷방송통신학회 2019 International Journal of Internet, Broadcasting an Vol.11 No.2
Research classification of software modules was done to validate the approaches proposed for addressing limitations in existing classification approaches. The objective of this study was to replicate the experiments of a recently published research study and re-evaluate its results. The reason to repeat the experiment(s) and re-evaluate the results was to verify the approach to identify the faulty and non-faulty modules applied in the original study for the prioritization of test cases. As a methodology, weconducted this study to re-evaluate the results of the study. The results showed that binary logistic regression analysis remains helpful for researchers for predictions, as it provides an overall prediction of accuracy in percentage. Our study shows a prediction accuracy of 92.9% for the PureMVC Java open source program, while the original study showed an 82% prediction accuracy for the same Java program classes. It is believed by the authors that future research can refine the criteria used to classify classes of web systemswritten in various programming languages based on the results of this study.
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Antioxidant Activity with Flavonoidal Constituents from Aerva persica
Ahmed Ejaz,Imran Muhammad,Malik Abdul,Ashraf Muhammad The Pharmaceutical Society of Korea 2006 Archives of Pharmacal Research Vol.29 No.5
A new flavanone Persinol (1) and the new flavanone glucosides persinosides A (2) and B (3), along with known flavonoids (4 and 5) have been isolated from the ethyl acetate soluble fraction of the whole plants of Aerva persica. Their structures were elucidated on the basis of extensive analysis of nuclear magnetic resonance (1D & 2D-NMR) spectral data. All of them showed profound antioxidative activities by DPPH and cytochrome-c-reduction assays using the HL-60 cell culture system.
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Antioxidant Activity with Flavonoidal Constituents from Aerva persica
Ejaz Ahmed,Muhammad Imran,Abdul Malik,Muhammad Ashraf 대한약학회 2006 Archives of Pharmacal Research Vol.29 No.5
A new flavanone Persinol (1) and the new flavanone glucosides persinosides A (2) and B (3), along with known flavonoids (4 and 5) have been isolated from the ethyl acetate soluble fraction of the whole plants of Aerva persica. Their structures were elucidated on the basis of extensive analysis of nuclear magnetic resonance (1D & 2D-NMR) spectral data. All of them showed profound antioxidative activities by DPPH and cytochrome-c-reduction assays using the HL-60 cell culture system.
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Daim Asif Raja,Syed Ghulam Musharraf,Muhammad Raza Shah,Abdul Jabbar,Muhammad Iqbal Bhanger,Muhammad Imran Malik 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.87 No.-
Polymer capped metal nanoparticles have been used for numerous biomedical and analyticalapplications. In present study, highly stable gold nanoparticles (AuNPs) capped with polypropyleneglycol (PPG) were synthesized using chemical reduction method. The characterization of PPG-AuNPs wasaccomplished by atomic force microscopy (AFM), zetasizer, fourier transform infrared spectroscopy (FT-IR) and UV–vis spectroscopy. Furthermore, PPG-AuNPs were utilized as colorimetric probe for thirdgeneration cephalosporin antibiotic, ceftriaxone (CEF). PPG-AuNPs permitted efficient, selective,quantitative and rapid recognition in concentration range of 0.1–100 mM in presence of numerousother drugs and salts. PPG-AuNPs have great potential for quantitative recognition of ceftriaxone inbiological and environmental samples. Moreover, the developed sensor has capacity to be applied asquality control of pharmaceutical formulations containing ceftriaxone. The PPG-AuNPs based sensorpermits quantitative and fast recognition of ceftriaxone away from a sophisticated laboratory setup.
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Rubina Abdul-Karim,Syed Ghulam Musharraf,Muhammad Imran Malik 한국고분자학회 2019 Macromolecular Research Vol.27 No.9
In this study, ring-opening polymerization (ROP) of propylene carbonate (PC) is conducted for synthesis of novel amphiphilic di- and tri-block copolymers containing poly(ethylene oxide) as hydrophilic with poly(propylene ether-carbonate (PPEC) as a hydrophobic block. A series of di- and tri-block copolymers is synthesized, by using macro-initiators [polyethylene glycol monomethyl ethers and poly(ethylene glycol)s] of different molar masses, while systematically varying monomer to macro-initiator ratio. The synthesized block copolymers are characterized by size exclusion chromatography, for augmentation in the molar mass, NMR for average chemical composition while liquid chromatography at critical conditions, is used for comparison of individual block lengths alongside purity of block copolymers, with regard to presence of homopolymers of both types. Chromatographic critical conditions of the polymer synthesized by ROP of PC, PPEC, are reported for the first time. Established chromatographic critical conditions of PEG and PPEC, successfully tracked presence of homopolymers of both types, with fair comparison of individual block lengths of the block copolymers synthesized by the same macroinitiator.
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Maria Yousaf Lodhi,Khalid Mahmood,Azhar Mahmood,Huma Malik,Muhammad Farooq Warsi,Imran Shakir,M. Asghar,Muhammad Azhar Khan 한국물리학회 2014 Current Applied Physics Vol.14 No.5
In this work cobalt substituted magnesium zinc nanocrystalline spinel ferrites having general formula Mg0.5CoxZn0.5xFe2O4 where x ¼ 0.1, 0.2, 0.3, 0.4, 0.5 were synthesized using micro-emulsion technique. The Co substituted samples annealed at 700 C and characterized by various characterization techniques, such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), dielectric measurements and vibrating sample magnetometer (VSM). XRD analysis confirmed single phase spinel structure and the crystalline size calculated by Scherrer’s formula found to be in 21.38e45.5 nm range. The lattice constant decreases as substitution of Co is increased. The decrease in lattice constant is attributed to the smaller ionic radius of cobalt as compared to zinc ion. The FTIR spectra reveled two prominent frequency bands in the wave number range 400e600 cm1 which confirm the cubic spinel structure and completion of chemical reaction. The dielectric parameters were observed to decrease with the increased Co contents. The peaking behavior was observed beyond 1.8 GHz. The frequency dependent dielectric properties of all these nanomaterials have been explained qualitatively in accordance with Koop’s phenomenological theory. Magnetic studies revealed that the coercivity (Hc) attains maximum value of 818 Oe at w21 nm. The increasing trend of magnetic parameters (coercivity and retentivity) is consistent with crystallinity. The crystallite size is small enough to attain considerable signal to noise ratio in high density recording media. The optimized magnetic parameters suggest that the material with composition Mg0.5Co0.5Fe2O4 may have potential applications in high density recording media.
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