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RISS 인기검색어
- 검색키워드
- 저자 : Jamshaid Rashid (검색결과 4 건)
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Jamshaid Rashid,M.A. Barakat,Numan Salah,Sami S. Habib 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.23 No.-
Zinc oxide nanoparticle thin films were synthesized on glass substrate by radio-frequency magnetron sputtering (RF Sputtering) technique. The thin films were characterized and tested for optical properties by using different techniques such as field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), UV–visible spectrophotometry and fluorescence spectrofluorophotometry. The produced nanoparticle ZnO thin films were investigated as photocatalyst for degradation of 2- chlorophenol (2-CP) in synthetic wastewater solutions under UV irradiation. Complete degradation of 2- CP was achieved by ZnO thin film (200 nm thickness) within 3 h at solution pH 3. The photocatalyst retained its high efficiency even after three reuse cycles.
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Sabaoon Shamshad,Jamshaid Rashid,Ihsan-ul-haq,Naseem Iqbal,Saif Ullah Awan 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.6
Multidrug resistance of bacteria is an emerging human health hazard and warrants development of novel antibacterial agents with more effective mode of action. Here, zinc oxide and silver nanomaterials were prepared using Ficus palmata Forssk leaf extract with efficient antibacterial activity. SEM coupled with EDS confirmed the spherical symmetry with average particle diameter 50 to 65 nm while the XRD confirmed crystalline face centered cubic structure of silver and hexagonal crystallize phase of zinc oxide nanoparticles. Antibacterial activity was evaluated for 8 pathogenic bacterial strains including 3 drug resistant pathogenic strains. The nanoparticles showed enhanced growth inhibition for resistant strains in comparison with the broad-spectrum antibiotics i.e. roxithromycin and cefixime. Minimum inhibitory concentration in μg.mL−1 of silver nanoparticles was found to be as low as 33.3 for resistant Streptococcus haemolyticus; 11.1 for Staphylococcus aureus and E Coli; and 3.7 mu;g.mL−1 for resistant Pseudomonas aeruginosa. Similarly, the minimum inhibitory concentration of zinc oxide nanoparticles was found to be 100 mu;g.mL−1 against resistant Streptococcus haemolyticus and Staphylococcus aureus; 11.1 mu;g.mL−1 for resistant Pseudomonas aeruginosa; and 3.7 mu;g.mL−1 against resistant E coli. Ficus palmata Forssk leaf extracts can be explored effectively for synthesizing active antibacterial nanomaterials as a non-toxic and environmentally benign synthesis route.
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Sabaoon Shamshad,Jamshaid Rashid,Ihsan-ul-haq,Naseem Iqbal,Saif Ullah Awan 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.6
Multidrug resistance of bacteria is an emerging human health hazard and warrants development of novel antibacterial agents with more effective mode of action. Here, zinc oxide and silver nanomaterials were prepared using Ficus palmata Forssk leaf extract with efficient antibacterial activity. SEM coupled with EDS confirmed the spherical symmetry with average particle diameter 50 to 65 nm while the XRD confirmed crystalline face centered cubic structure of silver and hexagonal crystallize phase of zinc oxide nanoparticles. Antibacterial activity was evaluated for 8 pathogenic bacterial strains including 3 drug resistant pathogenic strains. The nanoparticles showed enhanced growth inhibition for resistant strains in comparison with the broad-spectrum antibiotics i.e. roxithromycin and cefixime. Minimum inhibitory concentration in μg.mL<SUP>-1</SUP> of silver nanoparticles was found to be as low as 33.3 for resistant Streptococcus haemolyticus; 11.1 for Staphylococcus aureus and E Coli; and 3.7 μg.mL<SUP>-1</SUP> for resistant Pseudomonas aeruginosa. Similarly, the minimum inhibitory concentration of zinc oxide nanoparticles was found to be 100 μg.mL<SUP>-1</SUP> against resistant Streptococcus haemolyticus and Staphylococcus aureus; 11.1 μg.mL<SUP>-1</SUP> for resistant Pseudomonas aeruginosa; and 3.7 μg.mL<SUP>-1</SUP> against resistant E coli. Ficus palmata Forssk leaf extracts can be explored effectively for synthesizing active antibacterial nanomaterials as a non-toxic and environmentally benign synthesis route.
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Shazra Khalid,Aneela Iqbal,Asif Javed,Jamshaid Rashid,Ihsan ul Haq,Mohamed Abou El-Fetouh Barakat,Rajeev Kumar 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.11
Industrialization and urbanization have increased the demand for petroleum hydrocarbons; hence the likelihood of contamination of air, soil, and water bodies increases. The survival and biodegradation capabilities of fifteen bacterial isolates were tested in a harsh diesel environment. The bacteria were isolated from soil samples and identified by 16S rRNA gene sequencing. The biodegradation capability of isolates was performed in batch experiments, and diesel degradation analyses were conducted on gas chromatography-mass spectroscopy (GC-MS). The results revealed that only two bacterial isolates (A1 and E5) sufficiently consumed diesel hydrocarbons as a carbon-based energy source. 16S rRNA sequencing identified both isolates as Bacillus genera. An average of 60% of 3% (v/v) diesel was degraded in about 16 hours. Bacillus sp. E5 strain could degrade about 72% and 68% heavier compounds of C24 and C26. The Monod kinetic model for Bacillus sp. E5 utilizing diesel as a substrate showed maximum specific bacterial growth rate (μmax) as 0.1131 hr-1 at 1%, while 0.1287 hr-1 for 3% diesel. Results suggest that the isolated bacterial strain Bacillus sp. E5 has bioremediation potential and can be used as an alternative method for cleaning contaminated petroleum hydrocarbon field sites for sustainable development.
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