Quinone and its derivatives for energy harvesting and storage materials

Son, E.,Kim, J.,Kim, K.,Park, C. Royal Society of Chemistry 2016 Journal of Materials Chemistry A Vol.4 No.29

<P>In nature, quinone plays a vital role in numerous electrochemical reactions for energy transduction and storage; such processes include respiration and photosynthesis. For example, fast proton-coupled electron transfer between primary and secondary quinones in green plants triggers the rapid charge separation of chlorophyll molecules, achieving unparalleled photosynthesis with near-unity quantum yield. In addition, quinone-rich polymers such as eumelanin and polydopamine show unique optical and electrical properties (e.g., strong broadband absorbance or a switching response to external stimuli), mostly arising from their chemically disordered structures. Understanding the unique features of quinone and its derivatives can provide solutions to the construction of bio-inspired systems for energy harvesting and conversion. This paper reviews recent advances in the design of quinone-functionalized hybrid materials based on quinone's redox, electrical, optical, and metal chelating/reducing properties to determine these materials' applications in energy-harvesting and -storage systems, such as artificial photosynthetic platforms, rechargeable batteries, pseudocapacitors, phototransistors, plasmonic light harvesting platforms, and dye-sensitized solar cells.</P>

Integrated numerical method for the prediction of wind turbine noise and the long range propagation

Son, E.,Kim, H.,Kim, H.,Choi, W.,Lee, S. Elsevier 2010 CURRENT APPLIED PHYSICS Vol.10 No.2

Characteristics of noise propagation from wind turbine have been studied by using the integrated numerical methods based on Ray theory. There are two numerical approaches in this paper. Those are constructing noise sources of wind turbine and computing the noise level on the ground. First of all, the flow fields around the wind turbine blade are calculated using Wind Turbine Flow, Aeroacoustics and Structure analysis (WINFAS). WINFAS is an unsteady vortex lattice methods based on potential flow. The results of flow analysis are used for predicting tonal noise, turbulence ingestion noise, and airfoil self noise. Tonal noise is induced by the displacement of fluid and loading fluctuation of the blade and those are predicted by Farassat 1A equation. Moreover, semi-empirical formulas are used for the prediction of broadband noise such as the airfoil self noise and turbulence ingestion noise. Before the beginning of the next step, the acoustic pressure is integrated at the each point of virtual acoustic sphere considering retarded time. It also represents the noise directivity on wind turbine. Then, the noise level on the ground has been predicted including the effects of air absorption, ground reflection and diffraction.

Catecholamine-functionalized graphene as a biomimetic redox shuttle for solar water oxidation

Son, E.,Kim, J.,Ko, J.,Park, C. Royal Society of Chemistry 2017 Faraday discussions Vol.198 No.-

<P>In natural photosynthesis, solar energy is converted to chemical energy through a cascaded, photoinduced charge transfer chain that consists of primary and secondary acceptor quinones (i.e., Q(A) and Q(B)). This leads to an exceptionally high near-unity quantum yield. Inspired by the unique multistep architecture of charge transfer in nature, we have synthesized a catecholamine-functionalized, reduced graphene oxide (RGO) film as a redox mediator that can mimic quinone acceptors in photosystem II. We used polynorepinephrine (PNE) as a redox-shuttling chemical. We also used it to coat graphene oxide (GO) and to reduce GO to RGO. The quinone ligands in PNE, which are characterized by a charge transfer involving two electrons and two protons, acted as electron acceptors that facilitated charge transfer in photocatalytic water oxidation. Furthermore, PNE-coated RGO film promoted fast charge separation in [Ru(bpy)(3)](2+) and increased the activity of cobalt phosphate on photocatalytic water oxidation more than two-fold. The results suggest that our bio-inspired strategy for the construction of a forward charge transfer pathway can provide more opportunities to realize efficient artificial photosynthesis.</P>

Titanium oxide Thin Film의 광화학적 성질의 연구

이송주 광주보건대학 1989 論文集 Vol.14 No.-

Photoeffect in TiO₂=x electrolyte junction has been Observed in the Wave-length range from 200 to 800mm. Photocurrent Peak appeared at 328~368mm, 538~543mm, 623~633mm, and 743~763mm regions, and those at 328~368mm were the largest. Photocurrent in the visible region was about One-hundredth of Photocurrent of the UV region.

Insecticidal Effect of Sulfuryl Fluoride to Lasioderma serricorne, Fabricius (Coleoptera: Anobiidae)

Sone Jin,Ohh Myung-Hee 한국응용곤충학회 2000 한국응용곤충학회 학술대회논문집 Vol.2000 No.1

Carbon Dioxide Production in Stored Maize as Affected by Moisture Content, Level of Broken Corn and Foreign Materials and Infestation by Sitophilus zeamais Motschulsky

Sone, Jin Korean Society of Applied Entomology 1999 Journal of Asia-Pacific Entomology Vol.2 No.2

Carbon dioxide gas production in maize, mixed with 0, 5 or 10% broken corn and foreign material(BCEM) and 0 or 100 adult maize weevils at 13, 16 or 19% moisture content(mc) was studied in 1.8 liter thermos containers which were held at 26.6$^{\circ}C$ and 60$\pm$5% r.h. for 80 days. $CO_2$ was measured at 7 day intervals using an infrared gas analyzer. At 13 or 16% mc, higher $CO_2$production was measured in infested maize than in uninfested maize, and BCFM did not significantly affect $CO_2$production. At 19% mc, $CO_2$production. At 19% mc, $CO_2$production was greatly increased regardless of the presence of insects and BCFM. $CO_2$produced over 12 weeks was 110-166g/kg. The number of live maige weevils after 80 days was 538 in 13% mc, 344 in 16% mc and 48 in the 19% mc Therefore, respiration of fungi such as Aspergillus glaucus, Aspergillus candidus and Aspergillus terreus other than that of insects appeared to more greatly influence $CO_2$production than did th insects at 19% mc The moisture content and presence of maize weevils were major factors affecting respiration during storage, but level of BCFM did not significantly affect $CO_2$production. The $CO_2$produced over 12 weeks was 135-17 g/kg in infested miaze at 13% and 136-144 g/kg at 16% mc.

Heat Changes in Maize Storage Influenced by Compound Factors; Different Levels of Maize Weevils, Broken Corn and Foreign Materials, and Moisture Contents

Sone, Jin Korean Society of Applied Entomology 2000 Journal of Asia-Pacific Entomology Vol.3 No.2

Effect of Sitophilus zeamais Mostschulsky infestation on the heat changes of maitre at 13, 16, and 19% moisture content with 0, 5, and 10% broken com and foreign material was studied in 1.81 thermos containers Containers with infested and uninfested maitre were held in a chamber at 26.6$^{\circ}C$</TEX and 60$\pm$5% r.h. for 80 d. Temperatures were measured continuously using a datalogger system. At 13 and 16% moisture content, more grain heating was recorded in infested than in uninfested maize. Presence of Insects and moisture content level were major factors in grain heating during storage, Level of BCFM did not significantly affect the grain heating. At 19% moisture content, grain heating increased in all treatments. Heating appeared to be more related to microbial growth than to insect activity, and accumulated to 26.5-37 kj/kg maize at 3-4 wk. The growth of the maize weevil population was significantly affected by grain moisture content. The greatest number of offspring after 80 d was recorded in the 13% moisture content trial. At 19% moisture content, there were more dead than live insects.

An Analysis of Storage Food Ecosystem: Microflora Analysis in Dried Vegetable Storage as the Influence of indianmeal Moth, Plodia interpunctella Hubner (Lepidoptera:Pyralidae)

Sone Jin,Ryoo Mun-Il 한국응용곤충학회 2000 한국응용곤충학회 학술대회논문집 Vol.2000 No.1

총요소생산성의 추정을 통한 기술진보가 한국경제에 미치는 기여에 관한 연구

Sone Esambe,고종환(Ko Jonghwan) 부경대학교 인문사회과학연구소 2016 인문사회과학연구 Vol.17 No.1

본 논문에서는 기술진보가 한국경제의 생산에 얼마나 기여하였는가를 파악하기위해 성장회계방정식을 기반으로 한국 경제의 총요소생산성을 추정하였다. 한국의 KLEMS자료에 포함된 72개 산업의 거시통합자료를 만들고, 72개 산업을 농업, 광업, 제조업, 공익산업(수도 전기 가스 수도 등) 및 서비스산업 등 5개 산업군으로 나누었다. 1970년-2012년 분석기간 동안 광업과 제조업 분야의 총요소생산성이 비교적 크게 나타났지만, 농업, 공익산업 및 서비스업에서는 총요소생산성이 매우 낮게 나타났다. 이러한 결과는 한국 제조업이 총요소생산성의 향상에 힘입어 국제경쟁력을 갖게 되었다는 사실과, 특히 서비스업시장의 자유화를 통해 한국 서비스산업의 기술진보를 유도할 필요가 있다는 사실을 의미한다. 서비스시장의 개방을 통한 생산성의 향상은 다양한 서비스를 중간재로 사용하는 제조업의 생산성 향상에도 기여하게 될 것이다. We aim to examine the contribution of technical progress to the Korean economy with estimated total factor productivity (TFP). We use growth accounting equation in connection with the Korean KLEMS database for 1970-2012. We focus on the 72 sectors as prescribed by EU KLEMS-March 2011 updated database. After being examined at aggregate level, they were classified into five subgroups such as agriculture, mining, manufacturing, utilities, and services. TFP was calculated for the aggregate level as a whole consisting of 72 sectors as well as for five subgroups. The estimated results show that the total factor productivity growth rates for agriculture, utilities and services sectors are insignificant compared to those of the mining and manufacturing sectors. This is due to the Korean government’s policy to prioritize the manufacturing sector to improve its global competitiveness, implying that Korea has already obtained a high productivity level and its scope for further productivity improvement is limited. Therefore, there is a need to liberalize the services sector, leading to the increase of the productivity of the manufacturing sectors which use liberalized services as inputs.

Japanese Political Reform

Sone Yasunori 韓國世界地域硏究協義會 1997 世界地域硏究論叢 Vol.11 No.-