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Roghayeh Tarasi,Ali Ramazani,Massomeh Ghorbanloo,Mehdi Khoobi,Hamideh Aghahosseini,주상우,Abbas Shafiee 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.4
The manganese-containing mesoporous nanomaterial (MCM-41@PEIMn) was synthesized and used as a catalyst for the oxidation of cyclohexene, ethyl benzene, and toluene. The mesoporous MCM-41 was prepared via hydrothermal method and then polyethylenimine as a reactive surface modifier was grafted on its surface in the presence of ([3-(2,3-epoxypropoxy)propyl] trimethoxysilane) as a grafting agent. Manganese(ii) acetate was loaded onto the prepared MCM-41@PEI. The MCM-41, MCM-41@PEI, and MCM-41@PEI.Mn were characterized and elucidated by Fourier transform infrared, powder X-ray diffraction, thermogravimetric, N2 adsorption–desorption, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and transmission electron microscopy techniques. The catalytic activity and selectivity of the MCM-41@PEI.Mn in the oxidation of cyclohexene, ethyl benzene, and toluene with 30% aqueous H2O2 as an oxidant were studied. Furthermore, the influences of various parameters such as temperature, oxidant amount, catalyst reusability, and kinds of solvents have been studied. The results showed that the manganese-containing mesoporous nanomaterial was easily separated from the reaction mixture and reused at least five times without noticeable loss of activity.
Roghayeh Tarasi,Masoumeh Alipour,Lena Gorgannezhad,Somaye Imanparast,Aliakbar Yousefi-Ahmadipour,Ali Ramezani,Mohammad Reza Ganjali,Abbas Shafiee,Mohammad Ali Faramarzi,Mehdi Khoobi 한국고분자학회 2018 Macromolecular Research Vol.26 No.8
Three types of improved Fe3O4 magnetic nanoparticles (MNPs), including poly(amidoisophthalicacid) coated magnetite nanoparticles (Fe@PA), cyclodextrin (CD) anchored Fe@PA (Fe@PA-CD), and chitosan (Cs) coated Fe@PA-CD (Fe@PACD- Cs) were successfully developed and characterized. Laccase immobilization onto MNPs was carried out via physical adsorption. The maximal and minimal loading capacity were obtained for Fe@PA and Fe@PA-CD-Cs, respectively. Fe@PA-CDCs- laccase exhibited around 100% of the maximum activity at pH 4 and maintained 70% of its initial activity within the temperature range of 15-55 °C; and Cs coated nanoparticles were more efficient than non-coated. Fe@PA-CD-Cs-laccase maintained 70% of its initial activity up to 12 d from the first day of storage at 25 °C whereas the free laccase, Fe@PA-laccase, and Fe@PA-CD-laccase kept 10%, 28%, and 33% of initial activity, respectively. Furthermore, bio-removal of phenolic compounds was performed by the free and immobilized enzyme. Fe@PA-CD-Cs-laccase showed maximal removal with 96.4% and 85.5% for phenol and bisphenol A, respectively. It seems that Fe@PA-CD-Cs could be an appropriate support for immobilization of other enzymes in various industrial application especially bioremoval of phenolic compounds.
How customer experience management reconciles strategy differences between East and West
Ruth N. Bolton,Anders Gustafsson,Crina O. Tarasi,Lars Witell 한국마케팅과학회 2021 마케팅과학연구 Vol.31 No.3
This paper studies how customers of a global firm evaluate their experiences within and across 44 countries. It focuses on customers’ emotional, cognitive, sensory and behavioral responses to the catalog experience. It develops a theory-based model of satisfaction with the catalog experience as a function of experiential attributes and control variables. A second model captures how each experiential attribute’s contribution to the customer experience is influenced by market and customer characteristics. The models were operationalized using survey data from 366,185 customers who used the firm’s catalog across different trade areas in 44 countries, yielding 571 equations that describe satisfaction with the customer experience. Consistent with theoretical work on context-dependent judgments, nine contingency factors explain significant and substantial amounts of variation (30% on average) in the elasticities of the 12 experiential attributes. East and West can appear similar when market characteristics are similar – or when they are different. Emotional, cognitive, sensory, and behavioral responses to the customer experience systematically differ due to economic, demographic, technological, cultural and consumer characteristics. East and West especially differ in terms of responses to emotional and sensory experiences. Customer experience management can help to shape a strategy that resolves strategy differences between East and West.
Fariba Sadri,Ali Ramazani,Abdolhossain Massoudi,Mehdi Khoobi,Vahid Azizkhani,Roghayeh Tarasi,Leila Dolatyari,Bong-Ki Min 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.7
Magnetically nano-CoFe2O4 efficiently catalyzes oxidation of primary and secondary benzylic and aliphatic alcohols to give the corresponding carbonyl products in good yields. The reactions were carried out in an aqueous medium at room temperature in the presence of oxone (potassium hydrogen monopersulfate) as an oxidant. In addition, the catalysts could be reused up to 6 runs without significant loss of activities. Catalyst was characterized by SEM, XRD and IR.
Sadri, Fariba,Ramazani, Ali,Massoudi, Abdolhossain,Khoobi, Mehdi,Azizkhani, Vahid,Tarasi, Roghayeh,Dolatyari, Leila,Min, Bong-Ki Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.7
Magnetically nano-$CoFe_2O_4$ efficiently catalyzes oxidation of primary and secondary benzylic and aliphatic alcohols to give the corresponding carbonyl products in good yields. The reactions were carried out in an aqueous medium at room temperature in the presence of oxone (potassium hydrogen monopersulfate) as an oxidant. In addition, the catalysts could be reused up to 6 runs without significant loss of activities. Catalyst was characterized by SEM, XRD and IR.