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제암성물질의 합성에 관한 연구 VI. 2,4-Dihydroxy-5-nitropropiophenone 유도체의 합성 및 항종양시험
정원근(Won Keun Chung),이남복(Nam Bok Lee) 대한약학회 1973 약학회지 Vol.17 No.2
Seven beta-substituted-2, 4-dihydroxy-5-nitropropiophenones were synthesized as potential antineoplastic agents, and subjected to the screening test of survival effect and cell decrease effect. Of the synthesized compounds, beta-(1-methyl-1-hydroxymethyl) ethylamino-2,4-dihydroxy-5-nitropropiophenone, beta-(1,1-dihydroxymethyl) ethylamino-2, 4-dihydroxy-5-nitropropiophenone and beta-(1,1-dihydroxymethyl) propylamino-2,4-dihydroxy-5-nitropropiophenone were found to be active against both Ehrlich ascites carcinoma and Sarcoma 180.
Benzoxazolin-2-thione과 PAS의 Alkyl Ester과의 Mannich Base 합성 및 항균력에 관한 연구
정원근(Won Keun Chung),정상헌(Sang Hun Chung),정필근(Pil Keun Chung),윤원영(Won Yung Yoon),이남복(Nam Bok Lee) 대한약학회 1974 약학회지 Vol.18 No.4
Nine benzoxazolin-2-thione derivatives were synthesized as the potential antimicrobial substances. These compounds were tested for the antimicrobial activities using Staphylococcus aureus and Escherichia coli by way of tube dilution method. The three compounds of 1, II and VII inhibited the growth of S. aureus at the concentration of 1mcg/ml, and III, VI, VIII and IX exhibited considerable antimicrobial activities against S. aureus at the concentration of l0mcg/ml. As to the growth of E. Coli, VII VII and VIII inhibited at the concentration of 1mcg/ml. II,III and IV exhibited considerable antimicrobial activities against E. coli at the concentration of 10mcg/ml.
CdSe 나노입자 형광층 구조에 따른 백색 LED 발광 특성 연구
정원근 ( Won Keun Chung ),유홍정 ( Hong Jeong Yu ),박선희 ( Sun Hee Park ),전병희 ( Byung Hee Chun ),김성현 ( Sung Hyun Kim ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.3
TOPO/TOP capped CdSe nanoparticles were synthesized via thermal-solvent method. The 540nm green and 620 nm red emitting CdSe nanoparticles were obtained by controlling the reaction time and temperature. Phosphor conversion white LED was produced combining a 460 nm emitting InGaN LED chip as an excitation source with 540 and 620 nm CdSe nanoparticles as phosphors. The single or double phosphor layer was fabricated by mixing with epoxy, and investigated the effects on the luminous properties of the white LED. The single phosphor layer white LED showed 5.78 lm/W with CIE of (0.36, 0.45) in reddish white, and the double phosphor layer white LED showed 7.28 lm/W with that of (0.32, 0.34) in pure white at 20 mA. When the 400 nm near-UV LED was applied to optical pumping source, the luminous efficiency of white LED was enhanced to 8.76 lm/W.
제암성물질의 합성 및 항종양시험에 관한 연구III. 수종한국산식물의 Ethanol Extract의 항종양시험
정보섭(Bo Sup Chung),정원근(Won Keun Chung),김중협(Choong Hyp Kim),천문우(Moon Woo Chun) 대한약학회 1970 약학회지 Vol.14 No.3,4
Alcohol extracts of six plant namely Coix agrestis L>OUREIRO, Chloranthus Japonicus (Siebi) NAKAI, Ajuga Spectabilis NAKAI, Juglans mandsuria Max,, Cirsium Macki var Ussuriense KITA and Sasamorpha Purpurascense (Hack) NAKAI were subjected to the screening tests for anti-tumor activities against SN-36 Leukemia, Sarcoma 180 and Ehrlich ascites carcinoma. Of the six extracts, Ajuga Spectabilis NAKAI and Coix agrestis LOUREIRO were found to be potential in survival effect of tumor transplanted mice.
초음파 합성법을 이용한 이리듐계 인광 물질 합성과 합성된 인광 물질의 전계 발광 특성 분석
유홍정 ( Hong Jeong Yu ),정원근 ( Won Keun Chung ),전병희 ( Byung Hee Chun ),김성현 ( Sung Hyun Kim ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.3
Ir(pmb)3 (Iridium(III)Tri(1-phenyl-3-methylbenzimidazolin-2-ylidene-C,C2) was synthesized to develop a deep blue-emitting Ir(III) complex. We suggested the ultrasonic reactor to enhance the poor reaction yield of Ir(pmb)3. The ultrasonic wave enhanced the reaction yield of Ir(pmb)3 because the ultrasound helped non-soluble reactants disperse efficiently and produced free radial during the reaction. The maximum yield of Ir(pmb)3 was 42.5%, which was 4 times higher than conventional method. Organic light emitting devices were fabricated with the synthesized mer-Ir(pmb)3 which emitted at 405 nm. A range of host materials with large bandgaps (UGH2, mCP and CBP) were tested for developing a deep blue emitting device. In case of the device with mCP as the host material, it emitted deep blue and performed quite well relative to the other host materials tested.
김완태(Kim, Wan-Tai),정관옥(Chung, Kwan-Ogg),김윤선(Kim, Yoon-Sun),조용문(Cho, Yong-Moon),정원근(Chung, Won-Keun),남기용(Nam, Kee-Yong) 대한생리학회 1970 대한생리학회지 Vol.4 No.1
Erythropoietic activity in anemic Plasma of chronic posthemorrhagic anemic men was studied in rats after subcutaneous injection of anemic plasma. Anemic plasma was obtained from blood donors who sold their blood once or twice a week for one or two years to blood bank. Hemoglobin concentrations of 8 blood donors ranged between 4.6 and 8.4 gm/100 ml. Pooled plasma was treated by acidification-boiling method and adjusted to pH 7.5 by adding 0.1 N NaOH. 7ml/kg and 15ml/kg of anemic plasma filtrate was injected to 2 groups of rats respectively for 7 and 8 days. Hemoglobin concentrations, red blood cell counts and reticulocyte counts were observed before and after injection of anemic plasma and no change was induced by the injection. Subsequently, it was concluded that there was no erythropoietin of high titer in the plasma of chronic post-hemorrhagic anemic men.
Acyclonucleoside류의 합성(7) - 6-아자유리딘의 2'', 3''-seco유도체의 합성 -
신대홍(Dae Hong Shin),양재욱(Jae Wook Yang),김중협(Joong Hyup Kim),정원근(Won Keun Chung),천문우(Moon Woo Chun) 대한약학회 1992 약학회지 Vol.36 No.6
Synthesis of 6-aza-2''-azido-2'', 3''-secouridine, 6-aza-2'', 3''-diazido-2'', 3''-secouridine, and 6-aza-5''-azido-2'', 3''-secouridine as potential antiviral agents is described. These acyclic nucleosides were synthesized from uridine by the method of ring opening reaction of sugar moiety. And these compounds were tested against HSV-1 and HSV-2, but the in vitro test results of these compounds were negative.
D-1,3-Dioxolane 및 D-1,3-Oxathiolane 피리미딘 뉴크레오사이드의 합성
홍준희(Joon Hee Hong),차마리(Ma Rie Cha),신성은(Seong Eun Shin),최보길(Bo Gil Choi),정병호(Byung Ho Chung),김중협(Joong Huyup Kim),이종교(Chong Kyo Lee),정원근(Won Keun Chung),천문우(Moon Woo Chun) 대한약학회 1994 약학회지 Vol.38 No.6
We synthesized D-1,3-dioxolanyl acetate from D-mannose using Frazer-Reide reaction and D-1,3-oxathiolanyl acetate from either D-mannose or D-galactose in good yields. These acetates were conjugated with various disilylated pyrimidine base using trimethylsilyl trifluoromethane sulfonate as a Lewis acid catalyst to obtain 32 different D-nucleosides.
Acyclonucleoside 류의 합성(3) -Ribavirin 유도체의 합성-
문형룡(Hyung Ryong Moon),양재욱(Jae Wook Yang),김문환(Moon Hwan Kim),천문우(Moon Woo Chun),정원근(Won Keun Chung) 대한약학회 1989 약학회지 Vol.33 No.6
The Synthesis of acyclic derivatives of ribavirin (2''-azido and halo seco derivatives) for the development of new antiviral agents is described. These acyclic nucleosides are synthesized from ribavirin by the method of ring opening reaction of sugar moietry.
L-1,3-Dioxolane 및 L-1,3-Oxathiolane 피리미딘 뉴크레오사이드의 합성
홍준희(Joon Hee Hong),박정하(Jeong Ha Park),송지연(Ji Yeon Song),최보길(Bo Gil Choi),정병호(Byung Ho Chung),김중협(Joong Hyup Kim),이종교(Chong Kyo Lee),정원근(Won Keun Chung),천문우(Moon Woo Chun) 대한약학회 1994 약학회지 Vol.38 No.6
(+/-)Dioxolane-T and(+/-)BCH-189 are know to possess anti-HIV activities, and less to xicities compared to other dideoxynucleoside AIDS drugs. We have synthesized 34 different enantiomerically pure nucleosides by glycosylation of L-1,3-dioxolanyl acetate and L-1,3-oxathiolanyl acetate sugar moieties with uracil or 6-azauracil with alkyl chains(C1-C3) on 5 or 6 position.