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Javed Iqbal,김호정(Ho Jeong Kim),양지원(Ji Won Yang) 대한환경공학회 2005 대한환경공학회 학술발표논문집 Vol.2005 No.12
Micellar-enhanced ultrafiltration (MEUF), a surfactant based membrane process for the removal of arsenic from aqueous stream has been studied using three types of cationic surfactants, hexadecylpyridinium chloride (CPC), hexadecyltrimethyl ammonium bromide (CTAB), octadecylamine acetate (ODA). In order to investigate the removal characteristics, the solution was processed by ultrafiltration membrane with pore size small enough to block the passage of the micelles and adsorbed ions. Two types of membrane having molecular weight cut-off (MWCO) 3,000 and 10,000 Da were employed. The removal of arsenic with CPC and CTAB observed more than 90% when the concentration of the surfactant was 10mM. However, the removal efficiency decreased to 77% with ODA. The rejection of the surfactant was more than 90% when its concentration increased to 10mM in the feed. The relative flux was relatively high at the beginning of the filtration but it decreased to 40% as the operation progressed. When ODA was used, the relative flux declined severely due to high viscosity of the surfactant solution.
( Saba Naseem ),( Javed Iqbal ),( Misbah Nosheen ),( Mark Wohar ) 한양대학교 경제연구소 2022 JOURNAL OF ECONOMIC RESEARCH Vol.27 No.3
While previous studies have investigated the asymmetric behavior of the J-Curve effect using a Nonlinear ARDL methodology, our study employs disaggregated industry data to investigate this for the relation between Pakistan and US, China, and the UK. Our study contributes to the existing literature by estimating the J-curve phenomena between Pakistan and her four major trading partners; the US, China, the UK, and Japan at the industry level while allowing for asymmetry in the relationship between the exchange rate and the trade balance. The present study estimates both the linear and non-linear ARDL models for selected 22 industries in the USA, 09 industries in China, 27 industries in the UK, and 15 industries in Japan that trade with Pakistan. The empirical exercise shows that the industries having symmetric J-curve effect are 03 in the case of the US and Pakistan, 01 in the case of China and Pakistan, 04 in the case of the UK and Pakistan, and 04 in the case of Japan and Pakistan either considering the traditional definition or the advanced definition of the J-curve effect. According to the asymmetric approach to cointegration, the J-curve effect exists between Pakistan and the USA, China, the UK, and Japan in 11, 02, 09, and 04 industries respectively. The results show that asymmetry holds in the case of many industries. The study indicates the asymmetric behavior of exchange rate changes concerning the trade balance.
Anticancer Activity of Essential Oils: Targeting of Protein Networks in Cancer Cells
Aras, Aliye,Iqbal, Muhammed Javed,Naqvi, Syed Kamran-Ul-Hassan,Gercek, Yusuf Can,Boztas, Kadir,Gasparri, Maria Luisa,Shatynska-Mytsyk, Iryna,Fayyaz, Sundas,Farooqi, Ammad Ahmad Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.19
Cancer is a multifaceted and genomically complex disease and research over decades has gradually and sequentially shown that essential biological mechanisms including cell cycle arrest and apoptosis are deregulated. The benefits of essential oils from different plants have started to gain appreciation as evidenced by data obtained from cancer cell lines and xenografted mice. Encouraging results obtained from preclinical studies have attracted considerable attention and various phytochemicals have entered into clinical trials.
Kamran, Muhammad,Javed, Nazir,Ullah, Ihsan,Nazir, Shahid,Jamil, Shakra,Iqbal, Muhammad Zafar,Abbas, Huma,Khan, Sajid Aleem,Haq, Muhammad Ehetisham ul The Korean Society of Plant Pathology 2019 Plant Pathology Journal Vol.35 No.1
A great variable response was observed when PP-3 and PP-J encumbered with 116 populations of root knot nematode (RKN) at two different temperatures ($25{\pm}2^{\circ}C$ and $30{\pm}2^{\circ}C$) and concentrations ($10^4$ and $10^5$ spores/ml). The PCR reaction amplified intergenic region between cytochrome oxidase subunit II gene (COII) and large subunit of rRNA gene (lrRNA) of the mitochondrial genome of different RKN species. The primer C2F3 and 1108 identified M. incognita with the highest frequency (52.6%) followed by M. javanica (36.8%) and M. arenaria (10.5%). The sizes of PCR products were 1.7 kb for M. incognita and M. javanica populations while populations of M. arenaria produced 1.1 kb fragment. The digestion with Hinf I yielded three different fragment length patterns on 1.5 % agarose gel. From current research it is concluded that intra-Meloidogyne genetic variability exist in RKN populations which have better encumbrance with P. penetrans.
Tanzeela YAQOOB,Javed IQBAL 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.1
This paper investigates the long run hedging ability of precious metals against the risks associated with adverse conditions of economic and financial variables for Pakistan, the USA, China, and India. Monthly data of gold, silver, platinum, stock returns, exchange rate, industrial production, and inflation was collected for the selected economies. Saikkonen and Lutkepohl (2002) unit root test was employed to access the unit root properties of the data series and identify the break dates. Furthermore, this study used the Johansen cointegration test with and without structural breaks to identify the long-run relationship between metals prices and different financial and economic variables. The findings suggest that the time series under study have unit root problem at level with and without structural breaks. Without considering structural breaks, the Johansen trace test indicates that in Pakistan and China, gold, silver, and platinum hold a cointegrating relationship with macroeconomic and financial variables. For the US, gold indicates cointegration which supports the hedging ability of gold against inflation, stock, and industrial production in the long run. The results of the cointegration test after incorporating the structural breaks provide even stronger evidence of the long-run relationship of precious metals and consumer prices, exchange rate, and stock prices.
Muhammad Amir,Tahir Fazal,Javed Iqbal,Aamir Alaud Din,Ashfaq Ahmed,Asim Ali,Abdul Razzaq,Zulfiqar Ali,Muhammad Saif Ur Rehman,박영권 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
The expensive carbonaceous substrates including graphene, reduced graphene oxide, carbon nanotubeshave been coupled with ZnO to improve the properties and photocatalytic performance of carbon basedZnO photocatalysts. To replace these expensive materials, biochar offers as a low-cost alternative to preparebiochar-based photocatalysts. In this study, Calotropis gigantea leaves derived biochar-ZnO (BC-ZnO)composites were synthesized to overcome the ZnO related problems (charge recombination, wider bandgap, and poor visible light absorption). Different BC-ZnO (BCZ-1–3) composites were characterized toevaluate their intrinsic properties and composites were employed to degrade ciprofloxacin (CIP). BCZ-3composite exhibited slower recombination of electron-hole pairs, lower band gap (2.97 eV), and betterlight absorption in visible region than ZnO. The enhanced adsorptive-photocatalytic degradation efficiencywas attained up to 98.5% using BCZ-3 than BC (46.2%) and ZnO (41.4%). The O2 and OH radicalswithin BCZ-3 are dominant reactive species indulged in CIP photocatalytic degradation. BCZ-3 photocatalystexhibits 80% degradation of CIP after four regeneration cycles. The maximum adsorption capacitywas achieved 54.18 mg g1 for BCZ-3 than BC (46.20 mg g1) and ZnO (15.55 mg g1). The results showthat BCZ-X composites can be used as stable, efficient, economical, and sustainable composite for therecovery of pharmaceutical wastewater.
The Relationship between Default Risk and Asset Pricing: Empirical Evidence from Pakistan
KHAN, Usama Ehsan,IQBAL, Javed Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.3
This paper examines the efficacy of the default risk factor in an emerging market context using the Fama-French five-factor model. Our aim is to test whether the Fama-French five-factor model augmented with a default risk factor improves the predictability of returns of portfolios sorted on the firm's characteristics as well as on industry. The default risk factor is constructed by estimating the probability of default using a hybrid version of dynamic panel probit and artificial neural network (ANN) to proxy default risk. This study also provides evidence on the temporal stability of risk premiums obtained using the Fama-MacBeth approach. Using a sample of 3,806 firm-year observations on non-financial listed companies of Pakistan over 2006-2015 we found that the augmented model performed better when tested across size-investment-default sorted portfolios. The investment factor contains some default-related information, but default risk is independently priced and bears a significantly positive risk premium. The risk premiums are also found temporally stable over the full sample and more recent sample period 2010-2015 as evidence by the Fama-MacBeth regressions. The finding suggests that the default risk factor is not a useless factor and due to mispricing, default risk anomaly prevails in the Pakistani equity market.