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333 results on '"Shah, Aamer Ali"'

27. Production and characterization of novel thermostable CotA-laccase from Bacillus altitudinis SL7 and its application for lignin degradation

Author

Khan, Sanam Islam, primary, Sahinkaya, Miray, additional, Colak, Dilsat Nigar, additional, Zada, Numan Saleh, additional, Uzuner, Urgu, additional, Belduz, Ali Osman, additional, Çanakçi, Sabriye, additional, Khan, Alam Zeb, additional, Khan, Samiullah, additional, Badshah, Malik, additional, and Shah, Aamer Ali, additional

Published
2023
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28. Production, optimization, and physicochemical characterization of biodiesel from seed oil of indigenously grown Jatropha curcas

Author

Haq, Abdul, primary, Laiq Ur Rehman, Mian, additional, Rana, Qurrat ul Ain, additional, Khan, Alam, additional, Sajjad, Wasim, additional, Khan, Haji, additional, Khan, Samiullah, additional, Shah, Aamer Ali, additional, Hasan, Fariha, additional, Ahmed, Safia, additional, Islam, Arshad, additional, Badshah, Malik, additional, Shah, Tawaf Ali, additional, Dawoud, Turki M., additional, and Bourhia, Mohammed, additional

Published
2023
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29. Unraveling the Radioprotective Mechanisms of UV-Resistant Bacillus subtilis ASM-1 Extracted Compounds through Molecular Docking

Author

Rahman, Asim Ur, primary, Ali, Aftab, additional, Ahmad, Faisal, additional, Ahmad, Sajjad, additional, Alharbi, Metab, additional, Alasmari, Abdullah F., additional, Fayyaz, Amna, additional, Rana, Qurrat ul ain, additional, Khan, Samiullah, additional, Hasan, Fariha, additional, Badshah, Malik, additional, and Shah, Aamer Ali, additional

Published
2023
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42. Production of bioethanol and biogas from Spirodela polyrhizain a biorefinery concept and output energy analysis of the process

Author

Rana, Qurrat ul ain, Khan, Muhammad Adil Nawaz, Shiekh, Zeshan, Parveen, Saleha, Ahmed, Safia, Irfan, Muhammad, Gauttam, Rahul, Shah, Aamer Ali, Jamal, Asif, Khan, Samiullah, and Badshah, Malik

Abstract

Spirodela polyrhizais a fast-growing hydrophyte with the ability to attain high starch and high biomass yield which makes it an excellent alternative feedstock for the production of biofuels. In this study, Spirodelawas given nutrient stress to enhance its starch content from 21 to 80%. The plant biomass with high starch was pretreated with dilute acid for conversion of starch to glucose which was fermented with indigenously isolated and optimized yeast strain and yielded 99.8% of theoretical ethanol yield. The fermentation vinasse was anaerobically digested, and 0.88 NL/g VS yield of biogas was obtained. Further, output energy analysis of bioethanol, biogas, and both bioethanol and biogas sequentially produced from Spirodelawas carried out, which showed that highest amount of energy is produced in the process where high starch containing Spirodelaplant biomass was used for the production of biomethane only. The results obtained showed that high starch Spirodelais best used in terms of energy when it is anaerobically digested for production of biogas only. To the best of our knowledge, this study is the first one which attempts to practically depict that this feedstock can be used in a sequential process to produce the two biofuel variants by using the same batch of feedstock. Further, this study for the first time evaluates the energy output potential of biofuels produced from Spirodela. It was interesting to see that in terms of energy output, duckweed has more potential for biogas production than that of ethanol, while many researchers have focused the production of ethanol only from Spirodela.

Published
2023
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47. Prebiotic potential of enzymatically prepared resistant starch in reshaping gut microbiota and their respond to body physiology

Author

Khan, Anum, primary, Ali, Huma, additional, Rehman, Ubaid Ur, additional, Belduz, Ali Osman, additional, Bibi, Amna, additional, Abdurahman, Mujib Abdulkadir, additional, Shah, Aamer Ali, additional, Badshah, Malik, additional, Hasan, Fariha, additional, Kilic, Ali Osman, additional, Ullah, Asad, additional, Jahan, Sarwat, additional, Rehman, Muhammad Maqsood Ur, additional, Mansoor, Rashid, additional, and Khan, Samiullah, additional

Published
2022
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48. The Purification and Characterization of a Cutinase-like Enzyme with Activity on Polyethylene Terephthalate (PET) from a Newly Isolated Bacterium Stenotrophomonas maltophilia PRS8 at a Mesophilic Temperature.

Author

Din, Salah Ud, Kalsoom, Satti, Sadia Mehmood, Uddin, Salah, Mankar, Smita V., Ceylan, Esma, Hasan, Fariha, Khan, Samiullah, Badshah, Malik, Beldüz, Ali Osman, Çanakçi, Sabriye, Zhang, Baozhong, Linares-Pastén, Javier A., and Shah, Aamer Ali

Subjects
CHEMICAL purification, STENOTROPHOMONAS maltophilia, POLYETHYLENE terephthalate, WASTE salvage, BACTERIAL enzymes, FOURIER transform infrared spectroscopy
Abstract

Featured Application: The potential use of bacteria and their enzymes for the degradation of plastic waste and the recovery of value-added products considering bio-up recycling for the circular economy. A polyethylene terephthalate (PET)-degrading bacterium identified as Stenotrophomonas maltophilia PRS8 was isolated from the soil of a landfill. The degradation of the PET bottle flakes and the PET prepared as a powder were assessed using live cells, an extracellular medium, or a purified cutinase-like enzyme. These treated polymers were analyzed using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The depolymerization products, identified using HPLC and LC-MS, were terephthalic acid (TPA), mono(2-hydroxyethyl)-TPA (MHET), and bis(2-hydroxyethyl)-TPA (BHET). Several physicochemical factors were optimized for a better cutinase-like enzyme production by using unique single-factor and multi-factor statistical models (the Plackett–Burman design and the central composite design software). The enzyme was purified for homogeneity through column chromatography using Sephadex G-100 resin. The molecular weight of the enzyme was approximately 58 kDa. The specific activity on para nitrophenyl butyrate was estimated at 450.58 U/mg, with a purification of 6.39 times and a yield of 48.64%. The enzyme was stable at various temperatures (30–40 °C) and pH levels (8.0–10.0). The enzyme activity was significantly improved by the surfactants (Triton X-100 and Tween-40), organic solvent (formaldehyde), and metals (NiCl2 and Na2SO4). The extracellular medium containing the cutinase-type enzyme showed a depolymerization yield of the PET powder comparable to that of Idonella skaiensis IsPETase and significantly higher than that of Humicola insolens thermostable HiCut (HiC) cutinase. This study suggests that S. maltophilia PRS8 is able to degrade PET at a mesophilic temperature and could be further explored for the sustainable management of plastic waste. [ABSTRACT FROM AUTHOR]

Published
2023
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49. Evaluation of agricultural wastes as a sustainable carbon source for the production of β-glucosidase from Bacillus stercoris, its purification and characterization.

Author

Ur Rahman, Ubaid, Qasim, Salma, Zada, Numan Saleh, Ahmad, Sohail, Shah, Aamer Ali, Badshah, Malik, Hasan, Fariha, and Khan, Samiullah

Subjects
AGRICULTURAL wastes, GLUCOSIDASES, BACILLUS (Bacteria), WHEAT bran, ORANGE peel, AMMONIUM sulfate
Abstract

β-glucosidases are found in all domains of life and has the ability to hydrolyse the glycosidic bond between carbohydrates and non-carbohydrates residues making it a potent enzyme from an industrial and agricultural perspective. The aim of the current study was isolation, screening, and identification of bacterial strains having maximum β-glucosidase activity from soil sample of Jacobabad, Pakistan. The isolates were screened primarily, and efficient isolates were confirmed for β-glucosidase production through secondary screening. Among the different isolated strains, 1j2 was selected as the best β-glucosidase producer. The isolate showed 99% similarity with Bacillus stercoris after 16S rRNA sequencing. Different culture conditions were optimized for effective β-glucosidase production. Enhanced level of β-glucosidase was achieved at 40°C, pH 8 at 150 rpm in a β-glucosidase production medium supplemented with a combination of agricultural residues of wheat bran 0.25% (w/v) and orange peel 0.25% (w/v), using 5% inoculum. Bacillus stercoris produced a higher yield (2.89U/mg) of β-glucosidase under optimized conditions. Partial purification of β-glucosidase was achieved after 80% ammonium sulfate precipitation. The enzyme was purified and had shown maximum specific activity of 53.2 U/mg with molecular weight of approximately 36 kDa. In all the tested metals Cu2+ was observed to have inhibitory effect while Ca2+ had not affected the enzyme activity significantly. While organic solvents and surfactants had significantly reduced the β-glucosidase activity. Based on the afore mentioned abilities of purified β-glucosidase from Bacillus stercoris strain it could be a promising player for the industrial applications of lignocellulose hydrolysis found in agricultural residues for the cheap production of biofuels. [ABSTRACT FROM AUTHOR]

Published
2023
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