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RISS 인기검색어
- 검색키워드
- 저자 : Zulfiqar Ali Raza (검색결과 4 건)
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Zulfiqar Ali Raza,Umaira Bilal,Unsa Noreen,Somayyah Abdul Munim,Shahina Riaz,Muhammad Umar Abdullah,Sharjeel Abid 한국섬유공학회 2019 Fibers and polymers Vol.20 No.7
Cellulosic materials being biodegradable are susceptible to bacterial attack. Present study was meant to develop anantibacterial viscose fabric via a clean, easy and reproducible approach. Silver nanoparticles (SNPs) were prepared usingchitosan both as reducing and as well as stabilizing agent to promote green synthesis of SNPs. The prepared SNPs werecharacterized using dynamic light scattering and UV-visible (vis) absorption spectroscopy. The average size of SNPs wasfound to be 8.574 nm with respective zeta potential of +45.2 mV using AgNO3 concentration of 1 mM and chitosan as 1 %(w/v). Pre-treated viscose fabric was undergone an in situ treatment to impregnate SNPs on its surface under certain autoclaveconditions. Scanning electron microscopy revealed the presence of SNPs on surface of treated viscose fabric in comparisonwith the untreated fabric. In addition, Fourier transform infrared and elemental analysis confirmed the presence of silver onthe treated fabric. The textile properties of the viscose fabric samples like; tensile strength, wettability, antibacterial activityand whiteness were evaluated using the standard protocols. The developed treated viscose fabric showed good antibacterialproperties against both Gram negative Escherichia coli and Gram-positive Staphylococcus aureus bacterial strains with fairtextile characteristics. This is the first report on in situ fabrication and impregnation of SNPs using chitosan as both reducingand stabilizing agent on a regenerated cellulose fabric like viscose.
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Genetic and Molecular Control of Floral Organ Identity in Cereals
Ali, Zulfiqar,Raza, Qasim,Atif, Rana Muhammad,Aslam, Usman,Ajmal, Muhammad,Chung, Gyuhwa MDPI AG 2019 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.20 No.11
<P>Grasses represent a major family of monocots comprising mostly cereals. When compared to their eudicot counterparts, cereals show a remarkable morphological diversity. Understanding the molecular basis of floral organ identity and inflorescence development is crucial to gain insight into the grain development for yield improvement purposes in cereals, however, the exact genetic mechanism of floral organogenesis remains elusive due to their complex inflorescence architecture. Extensive molecular analyses of Arabidopsis and other plant genera and species have established the ABCDE floral organ identity model. According to this model, hierarchical combinatorial activities of A, B, C, D, and E classes of homeotic genes regulate the identity of different floral organs with partial conservation and partial diversification between eudicots and cereals. Here, we review the developmental role of A, B, C, D, and E gene classes and explore the recent advances in understanding the floral development and subsequent organ specification in major cereals with reference to model plants. Furthermore, we discuss the evolutionary relationships among known floral organ identity genes. This comparative overview of floral developmental genes and associated regulatory factors, within and between species, will provide a thorough understanding of underlying complex genetic and molecular control of flower development and floral organ identity, which can be helpful to devise innovative strategies for grain yield improvement in cereals.</P>
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Naseer Ahmad,Shahid Kamal,Zulfiqar Ali Raza,Sharjeel Abid,Muhammad Zeshan 한국섬유공학회 2020 Fibers and polymers Vol.21 No.5
Present work investigates multi-response optimization in development of super-oleohydrophobic cotton fabricunder pad-dry-cure method. A bleached cotton fabric was treated with ZnO nanoparticles (NPs) incorporated oil and waterrepellent finish (Oleophobol CP-C®) to impart in it antibacterial activity, UV protection and super oleo/hydrophobicity. Taguchi based fuzzy logics and grey relational analytical techniques were employed to obtain simultaneous optimum settingsof input parameters including concentrations of ZnO NPs, O-CPC® finish and Knittex FEL®, and curing temperature formultiple responses. The fuzzy logics and grey relational analysis were employed on the experimental data to determinesignificant process parameters for optimization of multiple responses. The present set of techniques was effectively used todevelop super-hydrophobic (WCA: 162 o) and oleophobic (OCA: 140 o) cotton fabric along with appropriate textileproperties as reported in the text. The developed fabric has potential uses in various domestic and house-hold applicationsdue to its antibacterial, self-cleaning, non-staining and UV-protection properties.
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Huma Tariq,Abdul Rehman,Farzana Kishwar,Zulfiqar Ali Raza 한국섬유공학회 2022 Fibers and polymers Vol.23 No.11
Herein, clove oil encapsulated-chitosan morphologies have been prepared using the emulsion evaporation method. The prepared microstructures were analyzed for z-average and zeta potential using dynamic light scattering analysis and thenapplied on cellulosic fabric for antibacterial and textile properties using citric acid as a green cross-linker in the presence ofsodium hypophosphite as a catalyst. The treated fabric was characterized for surface morphology, chemical functionalities,crystal properties, conventional textile properties including whiteness index, air permeability, crease recovery, stiffness,tensile strength, antibacterial activity, and finish loading/release profiles. The z-averages of the native chitosan microcapsuleswere recorded as 250±10 nm, and that of 1 and 2 % (v/v) clove oil containing chitosan microcapsules were observed as300±10 and 380±15 nm, respectively. The chitosan-based microcapsules-treated cellulosic fabrics exhibited good broadspectrumantibacterial activity with overall retained tensile properties and a sustained release of essential oil in the phosphatebufferedsaline. The results were found validated based on statistical analysis.
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