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H9c2 심근 세포주에서 외인성 nitric oxide가 허혈에 의한 세포 독성에 미치는 영향
정성구,장현용,김명천,고영관,정주호,배영미,박원서,김대중,유영민,김성수,임성빈 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4
Background: Nitric oxide(NO) is known to have protective effects on an ischemic heart and to exert triggering effects on ischemic preconditioning. However, the effects of NO during the ischemic period have not been investigated. To investigate the role of exogenous nitric oxide in a model of ischemic heart cell death, we studied the effects of ischemic preconditioning and ischemia in a normal and an ischemic buffer. Methods: Rat cardiac myoblast cells(H9c2) were cultured in a normal and an ischemic buffered medium. For the ischemic culture of heart cells, the cells were cultured in a dessicator with GasPak for 5 hrs. In ischemic preconditioning, the cells were pretreated with ischemic buffer for 5 min and then perfused with normal medium for 30 min. For the measurement of the cytotoxicity, a MTT(3-4-Sdimethylthiazol-2-yl-2,5-diphenyl tetrazolium bromide) assay was performed. A DAPI(4',6-diamidino-2-phenylindole dihydrochloride) staining procedure and a flow cytometry analysis were performed to confirm apoptotic cell death by ischemia. Results: Cell viability, as determined by using a MTT assay, showed that the preconditioned group treated with NO showed more cell death than with the not-preconditioned groups in both normal and ischemic buffers. But, In normal medium and not-preconditioned groups, NO showed protective effect according to the concentrations(100,1000μM) . No treatment with NO produced the different results. In normal medium, the protective effect of ischemic preconditioning was demonstrated, but no protective effect of ischemic preconditioning could be seen in the case of the ischemic buffer. The DAPI staining and flow cytometry analysis of heart cells showed characteristic apoptotic features. Conclusion: NO added in the ischemic phase had deterious effects on heart cells. Ischemic preconditioning was more harmful than ischemia alone. The toxicity of the cells was characteristic apoptosis.
The Oxidation of Fullerene[C_(60)] using Several Oxidants under Microwave Irradiation
Ko, Weon Bae,Hwang, Sung Ho,Ahn, Ju Hyun 한국고무학회 2005 엘라스토머 및 콤포지트 Vol.40 No.1
풀러렌[C_(60)]은 3-chloroperoxy benzoic acid, benzoyl peroxide, trichloroisocyanuric acid, chromium(Vl) oxide 등의 산화제를 사용하여 마이크로파 조건에서 반응시켜 풀러렌 산화물[C_(60)(O)_(n)](n=1~4 or n=1)을 합성 하였다. 동일한 마이크로파 조건에서 여러 가지 산화제와 풀러렌[C_(60)]의 고체상태 반응성은 3-chloroperoxy benzoic acid > benzoyl peroxide > trichloroisocyanuric acid??chromium(Vl) oxide 순으로 증가함을 나타냈다. MALDI-TOF-MS, UV-visible, 그리고 HPLC를 사용하여 분석한 결과 생성된 풀러렌 산화물은[C_(60)(O)_(n)] (H=1~4 or n=1)임을 알 수 있었다. Synthesis of fullerene oxides[C_(60)(O)_(n)] (n=1~4 or n=1) by fullerene[C_(60)] and several oxidants such as 3-chloroperoxy benzoic acid, benzoyl peroxide, trichloroisocyanuric acid, and chromium(VI) oxide took place under microwave irradiation. The reactivity in solid state of fullerene[C_(60)] with various oxidants under same microwave condition increased in order of 3-chloroperoxy benzoic acid > benzoyl peroxide > trichloroisocyanuric acidchromium(VI) oxide. The MALDI-TOF-MS, UV-visible spectra and HPLC analysis confirmed that the products of fullerene oxidation were [C_(60)(O)_(n)] (n=1~4 or n=1).
마이크로파 조건에서 풀러렌 산화물 [C70On](n=1~3 or n=1)의 합성
고원배 ( Weon Bae Ko ),안주현 ( Ju Hyun Ahn ),임영아 ( Young A Lim ),한지연 ( Ji Yeon Han ),한동설 ( Dong Sul Han ) 한국고무학회 2004 엘라스토머 및 콤포지트 Vol.39 No.4
풀레렌[C_(70)]을 3-chloroperoxy benzoic acid, chromium (VI) oxide, benzoyl peroxide, trichloroisocyanuric acid 등의 산화제를 사용하여 1마이크로파 조건에서 반응시켜 풀러렌 산화물 [C_(70)O_(n)] (n=1~3 or n=1)을 합성하였다. 동일한 마이33.파 조.건에서 여러가지 산화제와 풀러렌 [C_(70)]의 고체상태 반응성은 3-chloroperoxy benzoic acid > rhromium(VI) oxide > trichloroisocyanuric acid ?? benzoyl peroxide 순으로 증가함을 나타냈다. MALDl-TOF MS, UV-visible, 그리고 HPLC를 사용하여 분석한 결과 생성된 풀러렌 산화물은 [C_(70)O_(n)] (n=1~3 or n=1)임을 알 수 있었다. Synthesis of fullerene oxides [C_(70)O_(n)] (n=1~3 or n=1) in solid state by fullerene [C_(70)] and several oxidants such as 3-chloroperoxy benzoic acid, chromium(VI) oxide, benzoyl peroxide, and trichloroisocyanuric acid was taken place under microwave irradiation. The reactivity in solid state of fullerene [C_(70)] with various oxidants under same microwave condition increased in the order of 3-chloroperoxy benzoic acid > chromium(VI) oxide > trichloroisocyanuric acid benzoyl peroxide. The MALDI-TOF-MS, UV-visible spectra and HPLC analysis confirmed that the products of fullerene oxidation were [C_(70)O_(n)] (n=1 -3 or n=1).
[C70]풀러렌 산화 반응의 거동에 관한 초음파 분광학적 고찰
고원배 ( Weon Bae Ko ) 한국고무학회 2014 엘라스토머 및 콤포지트 Vol.49 No.2
1,2-dichlorobenzene용액에서 [C70]풀러렌 과 3-chloroperoxy benzoic acid 산화반응의 거동을 고분해능 초음파 분광기를 사용하여 고찰하였다. UV-vis spectroscopy, X-ray diffraction 을 가지고 [C70]풀러렌 산화 반응의 생성물을 확인하였다. High resolution ultrasonic spectroscopy was used to observe the oxidation of [C70]fullerene with 3-chloroperoxy benzoic acid in 1,2-dichlorobenzene. UV-vis spectroscopy and X-ray diffraction confirmed the resulting products of [C70] fullerene oxidation.
고원배 ( Weon Bae Ko ),권석찬 ( Sock Chan Kown ),정홍식 ( Hong Seok Jeong ) 한국고무학회 2003 엘라스토머 및 콤포지트 Vol.38 No.2
풀러렌[C_60, C_70]을 benzoylperoxide, trichloroisocyanuric acid, methyltrioxorhenium(Ⅶ), iodosobenzene 그리고 phosphorous pentoxide 등의 산화제를 사용하여 상온, 초음파 조건에서 풀러렌 산화물을 제조하였다. MALDI-TOF MS, UV-VIS 그리고 HPLC를 사용하여 분석한 결과 생성된 풀러렌 산화물은 [C_60(O)_n](n=1~3, 또는 n=1) 과 [C_70(O)_n](n=1~2 또는 n=1)임을 알 수 있었다. 한편, 동일한 실험 조건에서 C_60 반응속도는 C_70보다 높았다. Synthesis of fullerene oxides by fullerenes [C_60, C_70] and several oxidants such as benzoylperoxide, trichloroisocyanuric acid, methyltrioxorhenium(Ⅶ), iodosobenzene, phosphorous pentoxide take place under ultrasonic condition at room temperature. The MALDI-TOF MS,UV-visible spectra and HPLC analysis confirmed that the products of fullerenes oxidation are [C_60(O)_n], (n=1~3 or n=1) and [C_70(O)_n], (n=1~2 or n=1). As compared with the reactivity of epoxidation of fullerenes [C_60, C_70], the reaction rate of C_70 was lower than that of C_60 under same reaction condition.
방향족 아민 화합물과 풀러렌 산화물의 [C70(O)n](n≥1)의 초음파 화학 반응
고원배 ( Weon Bae Ko ),박병은 ( Byoung Eun Park ),이영민 ( Young Min Lee ) 한국고무학회 2008 엘라스토머 및 콤포지트 Vol.43 No.1
FeCl3를 첨가한 초음파 조건에서 4-nitroaniline, 3-nitroaniline, and 4-isopropylaniline등의 방향족 아민 화합물과 풀러렌 산화물[C70(O)n] (n≥1)을 반응시켰다. 이 반응은 방향족 아민 화합물을 사용한 풀러렌 산화물 쪼개짐 반응이다. MALDI-TOF-MS and UV-vis spectra를 사용하여 생성된 화합물이 아민화 풀러렌 유도체임을 확인하였다. Sonochemical reaction of fullerene oxides, [C70(O)n] (n≥1) with several aromatic amines such as 4-nitroaniline, 3-nitroaniline, and 4-isopropylaniline, in the presence of FeCl3 were investigated under ultrasonic irradiation. This method is applicable to a wide variety of aromatic amines especially ring deactivated, to afford the corresponding cleavage products under mild conditions. The aminated fullerenes were confirmed by MALDI-TOF-MS and UV-vis spectra.
초음파 조건에서 여러가지 아민 N-옥시드와 풀러렌[C70]을 이용한 풀러렌 산화물의 합성
고원배 ( Weon Bae Ko ),한지연 ( Ji Yeon Han ),임영아 ( Young A Lim ),신원직 ( Won Jic Shin ),유구용 ( Gu Yong Yu ) 한국고무학회 2004 엘라스토머 및 콤포지트 Vol.39 No.2
vs플러렌[C_(70)]을 3-picoline N-oxide, pyridine oxide hydrate, quinoline 라oxide, isoquinolne N-oxide의 여러가지 아민 N-옥시드를 사용하여 25~43℃, 초음파 조건에서 반응시켜 풀러렌 산화물을 합성 하였다. 동일한 초음파 조건에서 여러가지 아민 N-옥시드에 대한 풀러렌 [C_(70)]의 반응성은 3-picoline N-oxide ?? pyridine N-oxide hydrate ?? quinoline N-oxide ?? isoquinoline N-oxide처럼 동일하게 나타났다. MALDI-TOF MS, UV-vis 그리고 HPLC를 사용하여 생성된 풀러렌 산화물을 분석한 결과 [C^(70)(O)_(n)] (n=1) 임을 알 수 있었다. N/A