Effect of toluene, an immiscible pollutant, on the photocatalytic degradation of azo dye

Mohsin Nawaz,이대성,임성린,김동우,Waheed Miran,Avinash Kadam,허준,신설혜,장지선 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.30 No.-

An adverse effect of a water-immiscible pollutant, toluene, on the photocatalytic degradation of DirectRed 80 (DR80) with TiO2 in an aqueous solution was observed when toluene was added as a continuousfree layer. However, a more efficient photocatalytic system was obtained when toluene was added in thePickering emulsion (PE) form with TiO2. With only UV and two different types of TiO2 (more hydrophilicand large-sized type A TiO2 and less hydrophilic and small-sized type B TiO2), 44% and 59% color removalwas observed, respectively. Almost 20% decrease in color removal with toluene in the continuous freelayer form was observed, however, the higher color removal was obtained when toluene was added as PEstabilized with type B TiO2 than with type A TiO2. The higher color removal was owing to the goodstability of PE stabilized with type B TiO2.

Extracorporeal photopheresis for chronic graft-versus-host disease: a systematic review and meta-analysis

Mohsin Ilyas Malik,Mark Litzow,William Hogan,Mrinal Patnaik,Mohammad Hassan Murad,Larry J. Prokop,Jeffrey L. Winters,Shahrukh Hashmi 대한혈액학회 2014 Blood Research Vol.49 No.2

Background The safety of extracorporeal photopheresis (ECP) in steroid-refractory chronic graft-versus- host disease (SR-cGVHD) has been explored in multiple studies but reported response rates (RR) vary significantly across studies. Methods We conducted a meta-analysis to assess the efficacy of ECP for SR-cGVHD. A search of electronic databases for studies published between 1984 and 2012 was conducted. End points included RR: complete response (CR), overall response rates (ORR), and organ- specific RR. The initial search generated 312 studies, of which 18 met the selection criteria (N=595). A random effects model was used for pooled rates. Results Pooled CR rates and ORR were 29% (confidence interval [CI], 19‒42%) and 64% (CI, 65‒ 82%), respectively. One-year overall survival was available for 4 studies only and was 49% (CI, 29‒70%). The pooled RR for skin, liver, ocular, oral, lung, gastrointestinal and musculoskeletal SR-cGVHD was 74%, 68%, 60%, 72%, 48%, 53%, and 64%, respectively. There was a significant heterogeneity among studies due to differences in ECP schedules and duration. No significant differences in responses to ECP for pediatric and adult populations were found. Sensitivity analysis could not be undertaken due to a limited number of prospective studies. Conclusion ECP is an effective therapy for oral, skin, and liver SR-cGVHD, with modest activity in lung and gastrointestinal SR-cGVHD.

Measurement of Traffic-Related Air Pollution in Peshawar, Pakistan - A Pilot Study

Mohsin Khan,Mohammad Abdul Aziz Irfan,Najeeb Ullah 한국대기환경학회 2021 Asian Journal of Atmospheric Environment (AJAE) Vol.15 No.4

This pilot study measured Traffic-Related Air Pollution (TRAP) and calculated the corresponding Air Quality Index (AQI) in Peshawar. Using Libelium wireless sensors, the research measured outdoor TRAP and monitored indoor air quality for 48 days. The maximum outdoors daily mean concentration was 47 μg m-3 for PM1, 90 μg m-3 for PM2.5, 356 μg m-3 for PM10, 258 ppb for SO2, and 219 ppb for NO2, respectively. This corresponds to PM2.5 AQI of 158 (Unhealthy), PM10 AQI of 148 (Unhealthy for Sensitive Groups; USG), SO2 AQI of 181 (Unhealthy), and NO2 AQI of 123 (USG). The maximum daily average concentration for the indoor condition was 31 μg m-3 for PM1, 49 μg m-3 for PM2.5, 78 μg m-3 for PM10, 465 ppb for SO2, and 247 ppb for NO2, respectively. The corresponding AQI was 135 (USG) for PM2.5, 62 (Moderate) for PM10, 254 (Very Unhealthy) for SO2, and 129 (USG) for NO2. Data analysis shows that about 73% of the overall indoor AQI falls in the category of “USG”, while SO2 was the largest contributor to overall AQI. The study concludes that indoor AQI was slightly better than outdoor AQI because of the distance and height from the outdoor location. Moreover, Pakistan’s AQI for PM2.5 exceeds WHO’s 24-hours limit; however, it was relatively better by 23%, 65%, and 170% compared to China, India, and Bangladesh, respectively. In contrast, AQI for SO2 and NO2 was poor as compared to the same countries. The concentration and AQI for traffic-related air pollutants remain unhealthy and sometimes becomes hazardous, which means the sensitive groups are at greater risk.

Using power to achieve network outcomes: why Funders should maintain a hands-on approach

Mohsin Bashir 한국행정학회 2016 International Review of Public Administration Vol.21 No.4

This article analyses the effects of organizational power on the outcomes of two public service networks in rural Pakistan. It finds that even networks that are alike when compared along the determinants of network effectiveness, as identified in the seminal work done by Turrini et al., can have considerably different outcomes. It also finds that the outcomes of these networks can be significantly altered by the exercise of power, or lack thereof, by infl uential collaborators. Based on these findings, the article concludes that funders in a public service network should adopt a hands-on approach to ensure that the network achieves its stated goals.

Assessing Efficiency of Handoff Techniques for Acquiring Maximum Throughput into WLAN

Mohsin Shaikha,Irfan Tunio,Baqir Zardari,Abdul Aziz,Ahmed Ali,Muhammad Abrar Khan International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.4

When the mobile device moves from the coverage of one access point to the radio coverage of another access point it needs to maintain its connection with the current access point before it successfully discovers the new access point, this process is known as handoff. During handoff the acceptable delay a voice over IP application can bear is of 50ms whereas the delay on medium access control layer is high enough that goes up to 350-500ms. This research provides a suitable methodology on medium access control layer of the IEEE 802.11 network. The medium access control layer comprises of three phases, namely discovery, reauthentication and re-association. The discovery phase on medium access control layer takes up to 90% of the total handoff latency. The objective is to effectively reduce the delay for discovery phase to ensure a seamless handoff. The research proposes a scheme that reduces the handoff latency effectively by scanning channels prior to the actual handoff process starts and scans only the neighboring access points. Further, the proposed scheme enables the mobile device to scan first the channel on which it is currently operating so that the mobile device has to perform minimum number of channel switches. The results show that the mobile device finds out the new potential access point prior to the handoff execution hence the delay during discovery of a new access point is minimized effectively.

Distributed Incremental Approximate Frequent Itemset Mining Using MapReduce

Mohsin Shaikh,Irfan Ali Tunio,Syed Muhammad Shehram Shah,Fareesa Khan Sohu,Abdul Aziz,Ahmad Ali International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.5

Traditional methods for datamining typically assume that the data is small, centralized, memory resident and static. But this assumption is no longer acceptable, because datasets are growing very fast hence becoming huge from time to time. There is fast growing need to manage data with efficient mining algorithms. In such a scenario it is inevitable to carry out data mining in a distributed environment and Frequent Itemset Mining (FIM) is no exception. Thus, the need of an efficient incremental mining algorithm arises. We propose the Distributed Incremental Approximate Frequent Itemset Mining (DIAFIM) which is an incremental FIM algorithm and works on the distributed parallel MapReduce environment. The key contribution of this research is devising an incremental mining algorithm that works on the distributed parallel MapReduce environment.

Dead immobilized Rhizopus Arrhizus as a potential biosorbent for copper removal

Mohsin Kazmi,Nadeem Feroze,Naveed Ramzan 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.1

The contemporary study reveals the potential of dead immobilized Rhizopus Arrhizus (DIRA) by studying the effects of initial pH of solution, contact time, initial Cu(II) concentration, co-ion, desorption and biosorbent reuse on the uptake of Cu(II) from synthetic solution. Optimum pH for Cu(II) biosorption on DIRA was 6.5. Pseudo secondorder kinetic most suitably elucidated the kinetic trend. Removal of Cu(II) by DIRA followed the Freundlich adsorption isotherm. Experiments on effect of temperature revealed endothermic nature of Cu(II) biosorption upon DIRA. Na+and Ca++ showed synergetic effect, while Mg++ and Zn++ revealed antagonistic effect on the biosorption of Cu(II). It was shown that reuse of DIRA was possible by means of 0.1 M HCl as an eluent.

Effect of ethyl acetate aroma on viability of human breast cancer and normal kidney epithelial cells in vitro

Mohsin A. Khan,Rumana Ahmad,Anand N. Srivastava 한국한의학연구원 2017 Integrative Medicine Research Vol.6 No.1

Background: Aromatherapy is used in clinical settings for patients suffering from several chronic and critical diseases such as cancer. Ethyl acetate (EA) is a colorless liquid with a characteristic fruity smell and is naturally present in fruits and wines. Methods: In the present study, the effect of the aroma of EA was evaluated on human breast cancer cell line MDA-MB-231 and normal cell line, Vero. Cell line viability and mechanism of EA cytotoxicity were determined by Trypan blue dye exclusion assay and phase contrast microscopy. Results: It was found that EA at a concentration of 0.026 M was effective in causing considerable cytotoxicity in breast cancer cells (without even coming in contact with the culture medium and cells), while showing no effect on normal cells. Mechanism of action of EA on cancer and Vero cells was investigated by DNA fragmentation and dye binding assays using agarose gel electrophoresis (AGE) and fluorescence microscopy/cytometry, respectively. It was found that EA aroma induced predominantly necrosis in the cancer cells exposed to it. Conclusion: A study such as this has not been attempted before and results need further investigation before EA aroma can be used as a complementary therapy.

Effects of 3.5 MeV Proton Irradiation on Pure Zirconium

Mohsin Rafique,San Chae,Qurat ul ain Sahi,Yong-Soo Kim 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.3

The effects of high energy proton irradiation on pure zirconium were investigated in this study. The annealed Zr specimens (50 mm × 3 mm × 0.8 mm) were irradiated by 3.5 MeV hydrogen ions with dose ranges from 1×10 13 to 1 × 10 15 ions/cm 2 at 335 K. The range of the proton beam penetration was measured to be 68-70 μm, depending on the surface, which is in good agreement with the SRIM simulation results. X-ray diffractometer analysis revealed that the peak intensity of the basal plane increased and the position of the peak shifted due to the proton irradiation. Field emission scanning electron microscopy results showed that with increasing irradiation dose hydrogen micro-bubbles formed, concentrated, interconnected, and eventually burst due to the excessive hydrogen pressure inside, causing surface-crack development. Measured yield and ultimate tensile strength seemed to be insignificantly affected by the proton irradiation.

우수, 중수 : 빗물관리-파키스탄에서의 가능성 있는 대안

( Mohsin Nawaz ),( Muhammad Tahir Amin ),( Moo Young Han ) 대한상하수도학회 2007 공동추계 학술발표회 논문집 Vol.2007 No.-