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Shah Syed Imran Abbas,Saleem Ammar,Munawar Sana,Khan Komal Zaman,Osman Sameh M.,Ehsan Muhammad Fahad,Manzoor Sumaira 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.4
This study presents hydrothermal synthesis of manganese telluride supported on graphene oxide (MnTe/GO) nanostructure, showcasing its exceptional potential as a material for supercapacitor applications. The thorough characterization of synthe- sized materials encompasses a variety of methodologies, notably X-ray diff raction (XRD), scanning electron microscopy (SEM), and Brunauer Emmet-Teller (BET) analysis, which collectively elucidate their structural, morphological, and textural attributes. Electrochemical assessments, employing established techniques such as cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), electrochemical impedance spectroscopy (EIS), and determination of electrochemical active surface area (ECSA), validate the exceptional performance of the synthesized materials. The nanocomposite MnTe/GO exhibits a heightened specifi c capacity (Csp) of 2203 F g −1 at a current density of 2 A g −1, demonstrating an impressive retention rate of 99% over 2000 cycles, thus highlighting its superior stability. These enhanced electrochemical capabilities are ascribed to the eff ective incorporation of MnTe into GO sheets, facilitating electron transfer and augmenting the active electrochemical surface area. Consequently, the electroactive nanocomposites, featuring metal telluride nanostructures, emerge as promising candidates for next-generation, high-performance supercapacitor applications.
Abdul Naeem,Shah Zaman,Muhammad Farooq,Ihtisham Wali Khan,Zahid Ali Ghazi,Tooba Saeed,Muhammad Hamayun 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.6
This work describes the practicability of utilizing bentonite clay as a cheap and raw support for heterogeneouscatalyst development. In the current research, ammonium persulfate (APS) impregnated bentonite heterogeneouscatalyst was designed for the conversion of waste cooking oil to biodiesel. The fabricated catalyst was analyzed byvarious instrumental techniques (FTIR, TGA, BET, SEM, XRD, and EDX) to study its various physiochemical properties. It was identified that the clay supported heterogeneous catalyst executed an excellent activity for waste cooking oilconversion as providing maximum biodiesel yield of 93% at optimal reaction conditions (reaction temperature 75 oC,oil/methanol molar ratio, 1 : 10; catalyst amount, 2.5 wt%; stirring rate, 600-rpm in 3.5 hr reaction time). Gas chromatographymass spectroscopy (GCMS) analysis confirms the successful conversion to biodiesel. Similarly, the variousphysiochemical characteristics of the synthesized biodiesel meet the international standard of American (ASTM6751)and European Union (EU-14214). Moreover, the designed acid catalyst showed catalytic activity for up to eight consecutiveruns demonstrate its good reusability.
Khalid, Nauman,Ahmed, Iftikhar,Latif, Malik Shah Zaman,Rafique, Tariq,Fawad, Sardar Atiq The Korean Society for Applied Biological Chemistr 2014 Applied Biological Chemistry (Appl Biol Chem) Vol.57 No.3
Allium species are considered to be one of the world's oldest cultivated vegetables. Most commonly used species of garlic in Pakistan and India is Allium sativum, while Allium tuberosum is mainly consumed and cultivated in China, Southeast Asia, and North-east part of India. The present study was conducted to compare the antimicrobial activity, nutritional value and antioxidant profile of Allium sativum and Allium tuberosum. The outcome indicates that Allium tuberosum have slightly higher antimicrobial activity, higher mineral profile, and enriched in antioxidants in comparison with Allium sativum. The highest antimicrobial activity of Allium tuberosum was noticed against Staphylococcus aureus and Bacillus subtilis with 43.9 and 40.7 mm zone of inhibition using 100% extract. Allium tuberosum contains high contents of calcium ($28.662{\pm}.00mg/100g$), potassium ($10.62{\pm}0.50$) and zinc ($59.00{\pm}1.00$). Allium tuberosum also showed higher antioxidant activity ($0.24{\pm}0.03mg$ vitamin C equivalent (VCE)/g fresh weight in ferric reducing antioxidant power assay, $0.18{\pm}0.02mg\;VCE/g$ fresh weight in 2,2-diphenyl-1-picrylhydrazyl assay and $1.09{\pm}0.12mg\;VCE/g$ fresh weight in 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) assay) in comparison with Allium sativum.
Nauman Khalid,Iftikhar Ahmed,Malik Shah Zaman Latif,Tariq Rafique,Sardar Atiq Fawad 한국응용생명화학회 2014 Applied Biological Chemistry (Appl Biol Chem) Vol.57 No.3
Allium species are considered to be one of the world’soldest cultivated vegetables. Most commonly used species ofgarlic in Pakistan and India is Allium sativum, while Alliumtuberosum is mainly consumed and cultivated in China, SoutheastAsia, and North-east part of India. The present study wasconducted to compare the antimicrobial activity, nutritional valueand antioxidant profile of Allium sativum and Allium tuberosum. The outcome indicates that Allium tuberosum have slightly higherantimicrobial activity, higher mineral profile, and enriched inantioxidants in comparison with Allium sativum. The highestantimicrobial activity of Allium tuberosum was noticed againstStaphylococcus aureus and Bacillus subtilis with 43.9 and 40.7mm zone of inhibition using 100% extract. Allium tuberosumcontains high contents of calcium (28.662±.00mg/100 g), potassium(10.62±0.50) and zinc (59.00±1.00). Allium tuberosum alsoshowed higher antioxidant activity (0.24±0.03 mg vitamin Cequivalent (VCE)/g fresh weight in ferric reducing antioxidantpower assay, 0.18±0.02 mg VCE/g fresh weight in 2,2-diphenyl-1-picrylhydrazyl assay and 1.09±0.12 mg VCE/g fresh weight in2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) assay) incomparison with Allium sativum.
Institutional Information Management and Automation System
M.Ahmad Nawaz Ul Ghani,Taimour Nazar,Syed Zeeshan Hussain Shah Gellani,Zaman Ashraf International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.8
World is moving towards digitization at a rapid pace, so the enterprises have developed information systems for management of their business. Empowering educational institutes with information systems are become very important and vital. Doing everything manually is very difficult for students, teachers and staff. Information system can enhance their efficiency and save a lot of time; this research proposed system will solve this issue by providing services like class room reservation, e-library facility, online submission etc. in a secured environment. Up till now limited attention has been paid to utilize robots and drones for automation inside educational institutes. Our proposed system incorporates robots and drones to fill this gap in automation being used in institutes. Through this research, the aim is to improve the efficiency of learning and services in educational institutions or universities.
Rizwana Kousar,Syed Imran Rais,Abdul Mansoor,Khalid Zaman,Syed Tahir Hussain Shah,Shakira Ejaz 한국유통과학회 2019 The Journal of Asian Finance, Economics and Busine Vol.6 No.1
The objective of the study is to examine the impact of financial development and foreign remittances on poverty and income inequality in the context of Pakistan. The study used ARDL-Bounds testing approach for robust inferences. The results show that in the short-run, remittances increases poverty and income inequality, which further translated into its long-run impact. The result confirmed the inverted Ushaped relationship between per capita income and income inequality, while the second order coefficient of per capita income substantially decline poverty incidence in a country. In the long-run, the results disappeared and it’s turned into U-shaped relationship between income inequality and country’s per capita income. Education largely decreases income inequality both in the short and long-run, however, it increases poverty in the long-run. Unemployment rate substantially damaged the pro-poor growth scenario, as high unemployment rate increases both the poverty rates and income inequality, which suffered poor more than non-poor in a country. Financial development has a positive impact on poverty reduction and income inequality in the short-run. The impact of income inequality on poverty incidence is positive both in the short- and long-run, which need pro-poor growth policies and rationale income distribution in a country.
Yan Zhang,Xiaolong Ma,Jinjun Liu,Zhuo Dong,Shah Zaman,Jiuqiang Han 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
Diode-assisted buck-boost voltage source inverter (VSI) boosts the dc source voltage by introducing a diode-capacitor network. With capacitive charging in parallel and discharging in series, it extends voltage regulation range and avoids extreme boost duty ratio. As for the unique structure, various pulse width modulation (PWM) strategies are provided with regarding to the chopped intermediate dc-link voltage. In order to maximize voltage gain, as well as to achieve the increased efficiency, this paper proposed a novel modulation strategy by reducing the switching frequency of power devices in the inverter bridge. The operation principle and relationship of switching device voltage stress versus voltage gain are analyzed in detail. Simulation and experiments are implemented to verify the theoretical analysis. Compared with existing modulation strategies, diode-assisted buck? boost VSI with new modulation scheme demonstrates good performances: less power device requirement and higher efficiency in high voltage gain application. Owing to improved performance, it is a more competitive topology for wide range dc/ac voltage regulation in renewable energy application, especially for ac output with relatively high fundamental frequency. Furthermore, the idea of proposed modulation scheme can also be extended to the control of other quasi two-stage inverter.