Výsledky vyhledávání - "Jung-Duk Kim"

The Study on Concentration of PM10and Heavy Metal in Public Schools at Chung-Nam Area

Autor: Tae-Jin Cho, Mi-Ra Song, Wonho Yang, Bu-Soon Son, Tae Woong Chung, Jung-Duk Kim

Publikováno v: Journal of Environmental Science International. 17:1005-1013

In this study, in order to analyze the air quality of the indoor environments of schools, we measured the indoor, outdoor and personal exposure concentration level of for 40 classrooms(20 old, 20 new) in chungnam area from June 22 to July 19 and from

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c0a721393f285a5c888535c6d632a0f
https://doi.org/10.5322/jes.2008.17.9.1005

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Preparation and characterization of long persistence strontium aluminate phosphor

Autor: John Hulme, Jung-Duk Kim, Sang-Do Han, Chi-Hwan Han, Krishan Chander Singh, Jihye Gwak, Il-Su Chun, Devender Jakhar, Hak-Soo Lee, Tai-Yeon Cho

Publikováno v: Journal of Luminescence. 128:301-305

Long afterglow green phosphor SrAl 2 O 4 :Eu 2+ ,Dy 3+ is synthesized by a solid-state reaction method at 1350 °C under mild reducing atmosphere of activated carbon. The effects of B 2 O 3 flux on the sintering dynamic process and the optimum concen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::de59db40b7b2344e47312d551e6cc663
https://doi.org/10.1016/j.jlumin.2007.07.017

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Uniform and continuous SiO2 coating on ZnS phosphor

Autor: Jung-Duk Kim, Hua Yang, You-Hui Lee, Sang-Do Han, Kwang-Shik Myung, Krishan Chander Singh

Publikováno v: Materials Chemistry and Physics. 103:89-94

An investigation is reported for the coating of ZnS particles by silica using a buffer solution. Sodium silicate was used as the precursor material and it was diluted in water. The coating was performed at room temperature and sodium silicate was add

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6d824437a3e3b2a575fd530e835de585
https://doi.org/10.1016/j.matchemphys.2007.01.020

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The optical properties dependent on different doping concentrations of activators Cu2+and in ZnS:Mn,Cu,Cl phosphor

Autor: Jung-Duk Kim, Ae-Kyung Kwon, Sang-Do Han, Jihye Gwak, Hak-Soo Lee, Chi-Hwan Han

Publikováno v: Journal of Korean Sensors Society. 15:323-327

Manganese, copper and chlorine-doped ZnS phosphors (ZnS:Mn,Cu,Cl) were synthesized through solid-state reaction. Manganese was added in the range of amount mol % to ZnS phosphors containing 0.2 or 1.0 mol % of copper and a small amount of chlorine. A

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c76022a891f80bbca10c0f7f8f0a70b
https://doi.org/10.5369/jsst.2006.15.5.323

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Electroluminescent efficiency of alternating current thick film devices using ZnS:Cu,Cl phosphor

Autor: Satyender P. Khatkar, Young Woo Rhee, Gaytri Sharma, Sang Do Han, Jung Duk Kim

Publikováno v: Materials Science and Engineering: B. 131:271-276

ZnS:Cu,Cl phosphor is prepared with the help of low intensity milling of the precursor material in two step firing process. The synthesized phosphor is used for the preparation of alternating current thick film electroluminescent (ACTFEL) devices wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6cef84d92cd37508c42614b60a71fadd
https://doi.org/10.1016/j.mseb.2006.03.037

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Synthesis and Luminescence Characterization of En3+Doped Gd2O3Phosphors by Combustion Method

Autor: Jung-Duk Kim, Young-Ho Jeong, Krishan Chander Singh, Jinwon Park, Sang-Do Han, Kwang-Shik Myung

Publikováno v: Transactions on Electrical and Electronic Materials. 4:28-32

Europium-doped gadolinium oxide () phosphors have been prepared by combustion method using urea[HNCONH] or carbohydrazide[HNNHCONHNH] as fuel materials in a preheated furnace at 500. The phosphors obtained were fired at 1200 for 3 hours to get better

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::efe1261356756cda44010533d515da8b
https://doi.org/10.4313/teem.2003.4.5.028

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ChemInform Abstract: Regio- and Stereoselectivity in Palladium-Catalyzed Cycloreductions of 1,6-Enynes in the Presence of Formic Acid or Triethylsilane

Autor: Jung Duk Kim, Hye Rhyan Sung, Hyung Hoon Jung, Chang Ho Oh

Publikováno v: ChemInform. 32

Palladium catalyzed 1,6-enyne cycloreductions in the presence of 1.2 equiv. of formic acid (method A) would involve cycloalkylpalladium formates which proceed via two consecutive steps: β-elimination of alkylpalladium intermediates and then reductio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75beef33c7b175f06d3c528018feb66e
https://doi.org/10.1002/chin.200124049

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ChemInform Abstract: Palladium-Catalyzed Cyclizations of 1,6-Dienes in the Presence of Lewis Acids

Autor: Je Wook Han, Chang Ho Oh, Jung Duk Kim

Publikováno v: ChemInform. 33

Palladium-catalyzed cyclizations of several 1,6-dienes were accomplished by utilizing a catalytic amount of additives. Use of Lewis acids gave the endocyclic compounds, while use of silver(I) salts gave the exocyclic compounds.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8179251436d1687462fbb6e77e2cf75
https://doi.org/10.1002/chin.200219045

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