• Title/Summary/Keyword: Energy rose

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Formation of $I_2$ by a Photocatalytic Reaction of Rose Bengal (Rose Bengal의 광촉매 반응에 의한 $I_2$의 생성)

  • Yoon, Kil-Joong
    • Analytical Science and Technology
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    • v.9 no.1
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    • pp.72-77
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    • 1996
  • In the process of solar energy conversion into electrical energy using the photoelectrochemical cell containing the sensitizer, rose bengal and supersensitizer. $I^-$, the photocurrent is stabilized and durable. But the long time span of irradiation causes the decrease of photocurrent monotonically. Spectroscopic and electrochemical analyses of rose bengal solution containing $I^-$ revealed that the decrease of concentration of rose bengal was attributed to the reaction of rose bengal in the dark with $I_2$ formed as a result of the possible photocatalytic reaction of rose bengal with $I^-$.

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Photocatalytic Reaction of Sensitizer, Rose Bengal and Supersensitizer, Thiourea (감응제 Rose Bengal과 초감응제 Thiourea의 광촉매 반응)

  • Yoon, Kil-Joong
    • Analytical Science and Technology
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    • v.9 no.1
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    • pp.62-71
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    • 1996
  • The enhancement of the solar energy conversion efficiency into the electrical energy by the dye sensitization with a photoelectrochemical cell was studied. The magnitude of the rose bengal sensitized photocurrent containing the supersensitizer, thiourea was five times greater than that in the absence of thiourea. It was observed, however, that the long time span of irradiation causes the decrease in the photocurrent. Spectroscopic analysis of the dye solution showed that the dye molecule was photobleached and the insoluble aggregate which settles down in the solution, was formed as a result of the possible photocatalytic reaction and the disappearance of dye from the solution was the cause of the decreased photocurrent in the sensitization run.

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A Study on the Photocatalytic Dimerization of Rose Bengal and Allylthiourea (Rose Bengal과 Allylthiourea의 광촉매 이합체화 반응에 관한 연구)

  • Yoon, Kil-Joong;Hahm, Eun-Jeong;Kim, Kang-Jin
    • Analytical Science and Technology
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    • v.11 no.1
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    • pp.20-28
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    • 1998
  • Fluorimetric and absorption spectroscopic studies were performed to elucidate the photocurrent decay with time in the conversion process of solar energy into electrical energy using a photoelectrochemical cell containing rose bengal as a sensitizer, and allylthiourea as a supersensitizer. Spectra of dye solution before and after irradiation revealed a new photocatalytic dimerization reaction between sensitizer and supersensitizer. It was also found that the geometrical arrangement of the transition dipoles is oblique in the dimer of dye molecules.

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Pre-harvest ethylene control affects vase life of cut rose 'Carola' by regulating energy metabolism and antioxidant enzyme activity

  • Gong, Bi;Huang, Shuai;Ye, Niu;Yuan, Xue;Ma, Huiling
    • Horticulture, Environment, and Biotechnology : HEB
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    • v.59 no.6
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    • pp.835-845
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    • 2018
  • We studied the role of ethylene control in regulating energy metabolism, antioxidant enzyme activity, and vase life of cut rose Rosa hybrida 'Carola'. Rose flowers at stage II were sprayed with one of the following solutions: water (control), $10{\mu}L\;L^{-1}$ 1-methylcyclopropene (1-MCP), or $0.5g\;L^{-1}$ 2-chloroethanephosphonic acid (ethephon). After harvest, ethylene production rate, respiration intensity, energy charge (EC), activities of energy metabolism-related and antioxidant enzymes, and malondialdehyde (MDA) content were measured. Results showed that 1-MCP enhanced the activities of superoxide dismutase, $H^+$-adenosine triphosphatase, $Ca^{2+}$-adenosine triphosphatase, succinic dehydrogenase, and cytochrome c oxidase, increased adenosine triphosphate (ATP) content, maintained high EC levels, inhibited respiration intensity, reduced peroxidase (POD) and polyphenol oxidase (PPO) activity and MDA accumulation, and prolonged vase life. Ethephon promoted ethylene production and respiration intensity, increased POD and PPO activity, reduced ATP content and EC levels, and accelerated senescence. Our results support a novel role for ethylene control in regulating senescence of 'Carola'.

Study on iodine Labelling (II) Efficient of Labelling Rose Bengal, Hippuran, and Human Serum Albumin in Small Scale

  • Kim, Jaerok
    • Nuclear Engineering and Technology
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    • v.4 no.3
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    • pp.186-193
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    • 1972
  • For efficient micro scale syntheses of Rose $Bengal-^{131}I$, $Hippuran-^{131}I$, and $H.S.A.-^{131}I$, the dependence of labelling yields on pH, on salt contents, and on the volume of buffer solution in the reaction mixtures as well as the reaction apparatus were studied. pH of 5.6 was optimum for preparation of both Rose $Bengal-_{131}I$ and Hippuran $-^{13}I$ but pH of 8.5 was optimum for preparation of $H.S.A.-^{131}I$. Salt in the reaction mixtures hindered drastically the formation of $Hippuran-^{131}I$ but it slightly increased the labelling yield of H.S.A.. The compactly closed reaction vessels were effective for preparations of both Rose $Bengal-^{131}I$and $Hippuran-^{131}I$ in small volume. Thereupon, the labelling procedures were modified to bring about higher labelling yields and better reproducibilities. By these newly established procedures, the labelling yields of Rose $Bengal-^{131}I$ and $Hippuran-^{131}I$ could be increased even with the home-produced sodium $iodide-^{131}I$ solution containing reducing agent.

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Comparative Analysis of Commercial Softwares for Wind Climate Data Analysis (풍력자원 계측자료 분석용 상용 소프트웨어 비교분석)

  • Kim, Hyun-Goo
    • New & Renewable Energy
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    • v.6 no.2
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    • pp.5-11
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    • 2010
  • This paper reviews three commercial softwares for wind climate data analysis in wind resource assessment; WAsP/Observed Wind Climate, WindRose and Windographer. Windographer is evaluated as the best software because of its variety of input data format, analysis functions, easiness of user interface, etc. For a quantitative understanding of uncertainty depending on software selection, a benchmark is carried out with the met-mast observation dataset at the Gimnyeong Wind Turbine Performance Test Site. It is found that Weibull parameter calculation and air density correction have a dependency on the software so that such uncertainty should be considered when an analysis software is selected. It is confirmed that annual energy production calculated by WAsP using a statistical table of frequency of occurrence may have some error compared to a time-series calculation method used by the other softwares.

Photocatalytic Reaction of Sensitizer, Rose Bengal and Supersensitizer, Allylthiourea (감응제 Rose Bengal과 초감응제 AIIylthiourea의 광촉매 반응)

  • Yoon, Kil-Joong;Lee, Beom-Gyu
    • Analytical Science and Technology
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    • v.11 no.1
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    • pp.13-19
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    • 1998
  • In the dye sensitization for the solar energy conversion with a photoelectrochemical cell containing allylthiourea, the time profile of the sensitized photocurrent showed a rise and fall with the irradiation time. The dye solution before and after irradiation was analyzed by means of spectroscopic methods. A new precipitation reaction between sensitizer and supersensitizer and photobleaching of the dye appeared to be involved in the decreased photocurrent.

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Development of Web-Based Wind Data Analysis System for HeMOSU-1 (웹기반 해모수-1 풍황자료 분석 시스템 개발)

  • Ryu, Ki-Wahn;Park, Kun-Sung;Lee, Jong-Hwa;Oh, Soo-Yun;Kim, Ji-Young;Park, Myoung-Ho
    • Journal of Wind Energy
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    • v.4 no.1
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    • pp.60-67
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    • 2013
  • A web-based program was developed for analyzing weather and structure data from the HeMOSU-1 offshore meteorological mast installed by the KEPCO Research Institute, and 35 km west-southwestward away from Gyeokpo located in Jeonbuk province. All of the measured data are obtained through the data transmitter and the server systems equipped on the HeMOSU-1 and the aerodynamic laboratory in Chonbuk National University respectively. The dualised server system consists of two servers, one is for logging the 1 second based raw data with 10 minute averaged values, and the other is for managing web page with processed weather data. Daily or weekly 10-min averaged data can be provided based on the input date by users. Processed weather data such as wind rose, Weibull distribution, diurnal distribution, turbulence intensity according to wind speed, wind energy density, and so forth are visualized through the web page which would be both useful and informative for developing the wind farm or designing a wind blade for the wind farm nearby southwest sea around the Korean Peninsula. The URL for this web page is http://www.hemosu.org/.

Preparation of Radiopharmaceuticals-(1) (방사성(放射性) 의약품(醫藥品) 합성방식(合成方式)에 관(關)한 연구(硏究) -제 1 부-(第 1 報))

  • Kim, You-Sun;Kim, Soon-Ok;Kim, Chong-Doo
    • The Korean Journal of Nuclear Medicine
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    • v.1 no.1
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    • pp.83-87
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    • 1967
  • The iodine containing radiopharmaceuticals, Hippuran, L-Thyroxine, Triiodothyronine, Rose Bengal, RISA, MAA, Triolein, Oleic acid and sterilized iodide solution were prepared. The labelling yield was av. 100-70%. The exchange method, iodination method, and chloramine-T procedure for a low temperature iodination were adopted as the preparative procedures. The preparative procedures and pyrogen free test of products were described and the distribution activity of the products in this institute was reported.

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Status of Photovoltaics in the world (세계 태양광발전산업 현황)

  • Kang, Gi-Hwan;Lee, Chang-Koo;Park, Kyung-Eun;Kim, Hyun-Il;Yu, Kwon-Jong;Kim, Jun-Tae
    • 한국태양에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.314-319
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    • 2009
  • The photovoltaic(PV) industry has been growing worldwide. Recently, the PV industries not also in the traditional PV advanced countries but also in other countries are rapidly growing. Especially, China has become the largest supplier in the world PV supply side since 2007. Both the world PV supply and demand rose steadily in 2008 like recent bumper years. In 2008, the world solar cell production reached 6.85GW~7.91GW presenting growth of 85% over the previous year. On the demand side, 81 countries contributed to the 5.95GW presenting growth of 110% over the previous year.

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