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Muhammad Asim Rasheed,Kamran Ahmad,Nilem Khaliq,Yaqoob Khan,Muhammad Aftab Rafiq,Abdul Waheed,Attaullah Shah,Arshad Mahmood,Ghafar Ali 한국물리학회 2018 Current Applied Physics Vol.18 No.3
The effect of electrochemical reduction on the structural and electrical properties of amorphous as well as annealed TiO2 nanotubes (TNTs) is investigated under ambient conditions. TNTs were prepared by anodizing titanium sheet in ethylene glycol electrolyte containing NH4F and de-ionized water at 40 V for 6 h. Electrochemical reduction is carried out in 1 M aqueous KOH solution for ~15 s at 3 V. TNTs are characterized by SEM, XRD, XPS and impedance spectrometer. XRD results confirm an increase in dspacing for (101) and (200) planes, after electrochemical reduction. XPS data reveal that electrochemical reduction produced prominent shifts of ~0.7e1.0 eV in the binding energies of TNTs. Interestingly, these shifts recover completely (in case of amorphous TNTs) and partially (in case of anatase TNTs) within ~7 days after reduction process due to oxygen uptake. Partial recovery in the binding energies of anatase TNTs is due to the fact that the oxygen vacancies are thermodynamically more stable as compared to amorphous TNTs. Similarly, the electrochemical reduction process decreases the impedance values of TNTs by more than three orders of magnitudes (from MU to kU). The impedance values also recover to the similar values before reduction in a span of ~7days.
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Aslam, Muhammad,Ahmad, Rizwan,Yasin, Muhammad,Khan, Asim Laeeq,Shahid, Muhammad Kashif,Hossain, Shakhawat,Khan, Zakir,Jamil, Farrukh,Rafiq, Sikander,Bilad, Muhammad Roil,Kim, Jeonghwan,Kumar, Gopalakr Elsevier 2018 Bioresource technology Vol.269 No.-
<P><B>Abstract</B></P> <P>Biohydrogen as one of the most appealing energy vector for the future represents attractive avenue in alternative energy research. Recently, variety of biohydrogen production pathways has been suggested to improve the key features of the process. Nevertheless, researches are still needed to overcome remaining barriers to practical applications such as low yields and production rates. Considering practicality aspects, this review emphasized on anaerobic membrane bioreactors (AnMBRs) for biological hydrogen production. Recent advances and emerging issues associated with biohydrogen generation in AnMBR technology are critically discussed. Several techniques are highlighted that are aimed at overcoming these barriers. Moreover, environmental and economical potentials along with future research perspectives are addressed to drive biohydrogen technology towards practicality and economical-feasibility.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Anaerobic membrane bioreactor technology for biohydrogen production is overviewed. </LI> <LI> Enhancement of biohydrogen yield and generation rates via various strategies is discussed. </LI> <LI> Techno-economic and environmental impacts of this approach are addressed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Sana Arz BHUTTO,Yasir JAMAL,Asim RAFIQ,Noor Un NISA,Saifullah SAIFULLAH,Munir HUSSAIN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.11
The aim of this study is to investigate the role of employee engagement as a mediator between the High-Performance Work System and the Service-Oriented Organizational Citizenship Behavior (Service-Oriented OCB). Furthermore, work-life balance as a moderator, the impact Service-Oriented OCB on customer satisfaction will be investigated. This study employs a quantitative methodology for which questionnaires were distributed to sixty restaurants in Karachi, and a sample of 418 responses was collected for structural equation modeling analysis. Smart PLS software was used to analyze the structure model. The results show that HPWS has a positive impact on Service-Oriented OCB. It is assumed that the role of work engagement as a mediator between HPWS and Service-Oriented OCB is significant. This study found that Service-Oriented OCB has a positive impact on customer satisfaction. Work-life balance was also found to have a moderating influence. The findings confirmed the black box mechanism and the HPWS procedures in restaurants. This study suggests implementing effective HPWS practices to influence employees’ work engagement, which leads to Service-Oriented OCB and employees being able to optimize their performance to influence customer satisfaction. The study contributes to the existing body of knowledge in human resource management.
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Sana Arz BHUTTO,Yasir JAMAL,Asim RAFIQ,Kashif MEHMOOD,Munir HUSSAIN,Amjad ALI 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.12
This study aims to examine the role of training and absorptive capacity as a mediator to examine the impact of human capital dimensions on the performance of an organization. This study employs the quantitative approach for analysis. A sample of 208 respondents was collected from the textile factories based in Karachi and Faisalabad. Data was analyzed using the PLS-SEM technique. PLS-SEM algorithm was used to check the validity and reliability of the data. PLS-SEM bootstrapping was used for studying the impact. The results show that the skills have an insignificant impact on organizational performance. Education and skills have an insignificant indirect impact on the performance of an organization. The research findings show that the human capital dimensions are full and partially mediated via absorptive capacity and training. The findings revealed that if we implement one by one dimension of human capital then it will not cause any increase in the organization’s performance but if we implement all dimensions then it results in optimal performance. Thus, this study suggests adopting effective training techniques and creating absorptive capacity in an organization to increase the performance of an organization. The findings of this study significantly contribute to the existing body of knowledge.
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