Special Theme 02 - NFPA의 화재안전교육 전략

Gamache, Sharon 한국화재보험협회 2011 防災와 保險 Vol.143 No.-

Sharon Gamache는 National Safety Council, NFPA에 근무하면서 대민화재안전교육 업무를 수행하여 왔다. NFPA의 High-Risk Outreach 프로그램을 총괄하며 다수의 대민화재안전교육 교재 제작을 지휘하였다.

Platinum nanocomposites and its applications: A review

Sharon, Madhuri,Nandgavkar, Isaac,Sharon, Maheshwar Techno-Press 2017 Advances in materials research Vol.6 No.2

Platinum is a transition metal that is very resistant to corrosion. It is used as catalyst for converting methyl alcohol to formaldehyde, as catalytic converter in cars, for hydrocracking of heavy oils, in Fuel Cell devices etc. Moreover, Platinum compounds are important ingredient for cancer chemotherapy drugs. The nano forms of Platinum due to its unique physico-chemical properties that are not found in its bulk counterpart, has been found to be of great importance in electronics, optoelectronics, enzyme immobilization etc. The stability of Platinum nanoparticles has supported its use for the development of efficient and durable proton exchange membrane Fuel Cells. The present review concentrates on the use of Platinum conjugated with various metal or compounds, to fabricate nanocomposites, to enhance the efficiency of Platinum nanoparticles. The recent advances in the synthesis methods of different Platinum-based nanocomposites and their applications in Fuel Cell, sensors, bioimaging, light emitting diode, dye sensitized solar cell, hydrogen generation and in biosystems has also been discussed.

Photocatalytic Degradation of E. coli and S. aureus by Multi Walled Carbon Nanotubes

Sharon, Madhuri,Datta, Suprama,Shah, Sejal,Sharon, Mahesh War,Soga, T.,Afre, Rakesh Korean Carbon Society 2007 Carbon Letters Vol.8 No.3

Carbon Nano Tubes could be either metallic or semi-conducting in nature, depending on their diameter. Its photocatalytic behavior has given an impetus to use it as an anti-microbial agent. More than 95% Escherichia coli and Staphylococcus aureus bacteria got killed when exposed to Carbon Nano Tubes for 30 minutes in presence of sunlight. Carbon Nano Tubes are supposed to have smooth surface on to which it accumulates positive charges when exposed to light. The surface that is non illuminated has negative charge. At the cellular level microorganisms produce negative charges on the cell membrane, Therefore damaging effect of multi walled carbon nano tubes (exposed to light) on the microorganisms is possible. In this paper, photo catalytic killing of microbes by multi walled carbon nano tubes is reported. Killing was due to damage in the cell membrane, as seen in SEM micrographs. Moreover biochemical analysis of membrane as well as total cellular proteins by SDS PAGE showed that there was denaturation of membrane proteins as well as total proteins of both the microbes studied. The killed microbes that showed a decrease in number of protein bands (i.e. due to breaking down of proteins) also showed an increase in level of free amino acids in microbes. This further confirmed that proteins got denatured or broken down into shorter units of amino acids. Increased level of free amino acids was recorded in both the microbes treated with multi walled carbon nano tubes and sunlight.

2,4-Dimethoxy-2,4-dimethylpentan-3-one: An Aprotic Solvent Designed for Stability in Li–O₂ Cells

Sharon, Daniel,Sharon, Pessia,Hirshberg, Daniel,Salama, Michael,Afri, Michal,Shimon, Linda J. W.,Kwak, Won-Jin,Sun, Yang-Kook,Frimer, Aryeh A.,Aurbach, Doron American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.34

<P>In this study, we present a new aprotic solvent, 2,4-dimethoxy-2,4-dimethylpentan-3-one (DMDMP), which is designed to resist nucleophilic attack and hydrogen abstraction by reduced oxygen species. Li-O-2 cells using DMDMP solutions were successfully cycled. By various analytical measurements, we showed that even after prolonged cycling only a negligible amount of DMDMP was degraded. We suggest that the observed capacity fading of the Li-O-2 DMDMP-based cells was due to instability of the lithium anode during cycling. The stability toward oxygen species makes DMDMP an excellent solvent candidate for many kinds of electrochemical systems which involve oxygen reduction and assorted evaluation reactions.</P>

Hydrogen Storage by Carbon Fibers Synthesized by Pyrolysis of Cotton Fibers

Maheshwar Sharon,Madhuri Sharon,Golap Kalita,Bholanath Mukherjee 한국탄소학회 2011 Carbon Letters Vol.12 No.1

Synthesis of carbon fibers from cotton fiber by pyrolysis process has been described. Synthesis parameters are optimized using Taguchi optimization technique. Synthesized carbon fibers are used for studying hydrogen adsorption capacity using Seivert's apparatus. Transmission electron microscopy analysis and X-ray diffraction of carbon fiber from cotton suggested it to be very transparent type material possessing graphitic nature. Carbon synthesized from cotton fibers under the conditions predicted by Taguchi optimization methodology (no treatment of cotton fiber prior to pyrolysis, temperature of pyrolysis 800℃, Argon as carrier gas and paralyzing time for 2 h) exhibited 7.32 wt% hydrogen adsorption capacity.

Effect of Inherent Anatomy of Plant Fibers on the Morphology of Carbon Synthesized from Them and Their Hydrogen Absorption Capacity

Madhuri Sharon,Maheshwar Sharon 한국탄소학회 2012 Carbon Letters Vol.13 No.3

Carbon materials were synthesized by pyrolysis from fibers of Corn-straw (Zea mays), Rice-straw (Oryza sativa), Jute-straw (Corchorus capsularis) Bamboo (Bombax bambusa), Bagass (Saccharum officinarum), Cotton (Bombax malabaricum), and Coconut (Cocos nucifera); these materials were characterized by scanning electron microscope, X-ray diffraction (XRD), and Raman spectra. All carbon materials are micro sized with large pores or channel like morphology. The unique complex spongy, porous and channel like structure of Carbon shows a lot of similarity with the original anatomy of the plant fibers used as precursor. Waxy contents like tyloses and pits present on fiber tracheids that were seen in the inherent anatomy disappear after pyrolysis and only the carbon skeleton remained; XRD analysis shows that carbon shows the development of a (002) plane, with the exception of carbon obtained from bamboo, which shows a very crystalline character. Raman studies of all carbon materials showed the presence of G- and D-bands of almost equal intensities, suggesting the presence of graphitic carbon as well as a disordered graphitic structure. Carbon materials possessing lesser density, larger surface area, more graphitic with less of an sp3 carbon contribution, and having pore sizes around 10μm favor hydrogen adsorption. Carbon materials synthesized from bagass meet these requirements most effectively, followed by cotton fiber, which was more effective than the carbon synthesized from the other plant fibers.

Photocatalytic Degradation of E. coli and S. aureus by Multi Walled Carbon Nanotubes

Madhuri Sharon,Suprama Datta,Sejal Shah,Mahesh War Sharon,T. Soga,Rakesh Afre 한국탄소학회 2007 Carbon Letters Vol.8 No.3

Carbon Nano Tubes could be either metallic or semi-conducting in nature, depending on their diameter. Its photocatalytic behavior has given an impetus to use it as an anti-microbial agent. More than 95% Escherichia coli and Staphylococcus aureus bacteria got killed when exposed to Carbon Nano Tubes for 30 minutes in presence of sunlight. Carbon Nano Tubes are supposed to have smooth surface on to which it accumulates positive charges when exposed to light. The surface that is non illuminated has negative charge. At the cellular level microorganisms produce negative charges on the cell membrane, Therefore damaging effect of multi walled carbon nano tubes (exposed to light) on the microorganisms is possible. In this paper, photo catalytic killing of microbes by multi walled carbon nano tubes is reported. Killing was due to damage in the cell membrane, as seen in SEM micrographs. Moreover biochemical analysis of membrane as well as total cellular proteins by SDS PAGE showed that there was denaturation of membrane proteins as well as total proteins of both the microbes studied. The killed microbes that showed a decrease in number of protein bands (i.e. due to breaking down of proteins) also showed an increase in level of free amino acids in microbes. This further confirmed that proteins got denatured or broken down into shorter units of amino acids. Increased level of free amino acids was recorded in both the microbes treated with multi walled carbon nano tubes and sunlight.

Simulation-based education for selected communication skills: exploring the perception of post-graduate dental students

Sharon Mascarenhas,Manal Al-Halabi,Farah Otaki,Mohamed Nasaif,Dave Davis 한국의학교육학회 2021 Korean journal of medical education Vol.33 No.1

Purpose: The role of simulation-based education (SBE) in enhancing communication has been established in the literature. To ensure achieving desired outcomes from SBE initiative, the individual learners, their experiences, and environments need to be considered. This study aimed at exploring the perception of post-graduate dental students regarding their participation in SBE sessions, around selected communication skills, designed in alignment with the assumptions of adult learning theory and steps of Kolb’s experiential learning cycle. Methods: This study utilized a qualitative design. Six focus-group sessions were conducted following the SBE sessions. The generated data was inductively investigated using a multi-staged participant-focused approach to thematic analysis, based upon constructivist epistemology. NVivo was utilized to facilitate text Fragments’ coding and categorization. Results: Forty-three post-graduate dental students participated. The analysis resulted in 16 categories spread across five sequential phases of the SBE experience. The “input” theme referred to the resources needed for the SBE process, and included three categories: facilities, personnel, and teaching materials. The second theme included steps of SBE “process”: pre-brief, simulation, and debrief. The third, fourth, and fifth themes constituted the short- and longer-term results of the SBE intervention. The participants reported instant benefits on confidence in their expertise in communicating with patients and their guardians. Additionally, perceived effects on the empathy and professionalism were reported. Conclusion: SBE, that is based upon adult and experiential learning theories, and developed after thorough consideration of the individual learners, and their experiences and learning environments, holds potential in enhancing communication skills among post-graduate dental students.

Sport Ethics

Sharon Kay Stoll 한국체육철학회 1995 움직임의철학 : 한국체육철학회지 Vol.3 No.2

Study on the Relative Price Difference between Online and Offline Products Focus on Age Adjustment Variables

( Sharon Smith ),( Jin Woo Jung ),( Hyo Jeong Kim ) 재단법인 서암순창장학회 2018 Journal of Marketing Thought Vol.5 No.3

The fact that off-line things can be replaced by online is a major feature of modern society. The space in which the photo book was stored on the bookshelf to store the memories is now replaced by a palm-sized hard disk. As such, digitalization is spreading rapidly in many fields. Despite these benefits, the real-world advantages still appeal to consumers. (Belk 2013; Molesworth and Denegri-Knott 2013; Odom, Zimmerman, and Forlizzi 2011), rather than digital products that are easier and less expensive to store. (Ozgun Atasoy, 2018) that ownership is influenced by people's emotions and memories, and that the choice of ownership and digital license ownership depends on the individual's age.