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(±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo[b, d] Pyran-9(8H)-one의 염소화 반응에 관한 연구
백승화,홍기운,육찬남 원광대학교기초자연과학연구소 1992 基礎科學硏究誌 Vol.11 No.3
(±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo[b, d] pyran-9[8H]-one 의 염소화 반응은 metal halide와 함께 18-crown-6존재하에 m-chloroperbenzoic acid에 의해 산화반응이 일어났다. 이 반응계에서는 염소화 반응이 방향족 고리에만 선택적으로 일어났다. (±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo[b, d] pyran-9[8H]-one has been chlorinated in the aromatic ring with metal halide in the presence of 18-crown-6 on oxidation with m-chloroperbenzoic acid. This reagent system effects the regiospecific chlorination of activated aromatic ring over olefinic double bond.
ESR 및 ESEM을 이용한 VH-SAPO-11의 V(IV)화학종, 위치 및 흡착상호작용에 관한 연구
백건호,백승찬 昌原大學校 基礎科學硏究所 2002 基礎科學硏究所論文集 Vol.14 No.-
Vanadium-doped H-SAPO-11 samples were prepared by a high-temoerature solid-state reaction between SAPO-11 and the paramagentic V(IV) species and characterized carefully by ESR and Electron Spin-Echo Modulation(ESEM) studied. However,subsequent oxidation result weak paramagnetic V(IV) species,subsequent activation results in the formation of V(IV)species exist as vanadyl ion either as (V(IV)O)^2+ or V^4+. The (V(IV)O^2+ species seem more probable because of the following reasons.Since SAPO-11 have a low negative framework charge^32,more positively charged species, like V^4+ are not as easily stabilized.Tetravalent vanadium ion can only be observed at or below 77 K, the activated sample of VH-SAPO-11 can be measured even at room temperature. After adsorption of methanol, ethano, propanol, only one molecule coordinates to (V(IV)O)^2+ was observed in ESR and ESEM spectra.
10MgO-10Fe_2O_3-30Na_2O-5OSiO_2 유리의 Mo¨ssbauer 효과 연구
홍치유,박관호,백승도,문찬호,조수열 동국대학교 1987 論文集 Vol.26 No.-
The Mo¨ssbauer effect studies of the quenched glass and heat-treated glasses were performed. The Debye and Einstien temperatures of the quenched glass, determined using the center shift and kinetic temperature, are 540K and 430K respectively. The X-ray diffraction pattern showed that the heat-treated glasses were crystallized. Form the isomer shift of the heat-treated glasses, it was concluded that the Fe^(3+) ion is predominantly octahedrally coordinated.
박창식,김승건,김민찬,이상백 제주대학교 공과대학 첨단기술연구소 2005 尖端技術硏究所論文集 Vol.16 No.1
The experimental study on photocatalytic phenol removal was conducted by using TiO_(2) as a photocatalyst and ultraviolet(UV) ray as a light source. The effect of several variables such as the amount of photocatalyst, the wavelength of UV ray and the operation temperature and pH of reaction system on the removal efficiency of phenol was experimentally examined. Up to the concentration of photocatalyst 0.025g/L, the removal efficiency of phenol increased with the concentration of photocatalyst and beyond this concentration the reaction rate was independent of catalyst concentration. The removal of phenol was enhanced as the energy intensity was increased, that is the wavelength became shorter. It seemed that the photocatalytic decomposition of phenol prefers the basic condition and is insensitive to the operation temperature.
(±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo [b,d] pyran-9(8H)-one의 염소화 반응에 관한 연구
홍기운,육찬남,백승화 圓光大學校 1991 論文集 Vol.25 No.2
(±)-6a, Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo[b,d] pyran-9[8H]-one의 염소화 반응은 metal halide와 함께 18-crown-6존재하에m-chloroperbenzoic acid에 의해 산화반응이 일어났다. 이 반응계에서는 염소화 반응이 방향족 고리에만 선택적으로 일어났다. (±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo [b, d]pyran-9(8H)-one has been chlorinated in the aromatic ring with metal halide in the presence of 18-crown-6 on oxidation with m-chloroperbenzoic acid. This reagent system effects the regiospecific chlorination of activated aromatic ring over olefinic double bond.
리스페달 정(리스페리돈 2㎎)에 대한 리스펜 정의 생물학적 동등성
조혜영,박은자,강현아,백승희,이석,박찬호,문재동,이용복 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.2
The purpose of the present study was to evaluate the bioequivalence of two risperidone tablets, Risperdal (Janssen Korea Co., Ltd) and Rispen (Myung In Pharm. Co., Ltd), according to the guidelines of Korea Food and Drug Administration (KFDA). The risperione release from the two risperidone formulations in vitro was tested using KP Ⅷ Apparatus Ⅱ method with various of dissolution media (pH 1.2, 4.0, 6.8 butter solution and water). Twenty four healthy male subjects, 23.33±2.10 years in age and 69.24±8.05 kg in body weight, were divided into two groups and a randomized 2×2 crossover study was employed. After one tablet containing 2 ㎎ as risperidone was orally administered, blood was taken at predetermined time intervals and the concentration of risperidone in serum were determined using HPLC method with UV detector. The dissolution profiles of two formulations were similar at all dissolution media. Besides, the pharmacokinetic parameters such as AUC_(t), C_(max) were calculated and ANOVA test was utilized for the statistical analysis of the parameters using logarithmically transformed AUC_(t), C_(max) and untransformed T_(max). The results showed that the differences between two formulations based on the Risperdal were 0.20, -1.29 and -11.09% for AUC_(t), C_(max) and T_(max), respectively. There were no sequence effects between two formulations in these parameters. The 90% confidence intervals using logarithmically transformed data were within the acceptance range of log(0.8) to log(1.25) (e.g., log(0.90)∼log(1.03) and log(0.84)∼log(1.09) for AUC_(t) and C_(max), respectively). Thus, the criteria of the KFDA guideline for the bioequivalence were satisfied, indicating Rispen tablet and Risperdal tablet were bioequivalent.
비유피-4 정(염산프로피베린 20㎎)에 대한 건일염산프로피베린 정의 생물학적동등성
조혜영,박은자,강현아,백승희,김세미,박찬호,오인준,문재동,이용복 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.5
The purpose of the present study was to evaluate the bioequivalence of two propiverine hydrochloride tablets. BUP-4 (Jeil Pharm. Co., Ltd.) and Kuhnil Propiverine Hydrochloride (Kuhnil Pharm. Co., Ltd.), according to the guidelines of the Korea Food and Drug Administration (KFDA). The propiverine release from the two propiverine hydrochloride formulations in vitro was tested using KP Ⅷ Apparatus Ⅱ method with a variety of dissolution media (pH 1.2, 4.0, 6.8 buffer solutions, water and blend of polysorbate 80 into pH 6.8). Twenty six healthy male subjects, 23.73 ± 2.79 years in age and 67.04 ± 7.93 kg in body weight, were divided into two groups and a randomized 2 x 2 cross-over study was employed. After one tablet containing 20 mg as propiverine hydrochloride was orally administered, blood was taken at predetermined time intervals and the concentrations of propiverine in serum were determined using HPLC method with UV detector. The dis-solution profiles of two formulations were similar at all dissolution media. Besides, the pharmacokinetic parameters such as AUC" C _(max) and T _(max) were calculated and ANOVA test was utilized for the statistical analysis of the parameters using logarithmically transformed AUC, C_(max), and untransformed T_(max). The results showed that the differences between two formulations based on the BUP-4 were 0.17%, 7.98% and 4.55% for AUC,, C_(max), and respectively. There were no sequence effects between two formulations in these parameters. The 90% confidence intervals using logarithmically trans-formed data were within the acceptance range of log(0.8) to log(1.25) (e.g., log(0.88)-log(l .12) and log(0.90)-log(l.15) for AUC, and _(max), respectively). Thus, the criteria of the KFDA bioequivalence guideline were satisfied, indicating Kuhnil Propiverine Hydrochloride tablet was bioequivalent to BUP-4 tablet.
Seung Chan Park,Tuy An Trinh,Won-Yung Lee,Ji Yun Baek,Seung Yong Lee,Kyu Hee Choi,Jaewon Ha,Chang-Eop Kim,Ki Sung Kang,Hye Lim Lee 한국한의학연구원 2021 Integrative Medicine Research Vol.10 No.3
Background: This study aimed at determining the effect of the herbal mixture estrogen inhibition formula (EIF) and its possible mechanisms by precocious puberty animal models and network pharmacology-based analysis. Methods: Precocious puberty animal models were established by a single injection of 300 μg danazol, then female rats were administered EIF, vaginal openings were monitored, uterus and pituitary indices were determined. The levels of ALP, E2, LH, and FSH were measured using ELISA kits. Real-time PCR was performed to evaluate the mRNA expression of GnRH, UNC5C, and netrin-1 in hypothalamic tissues. We applied network pharmacological analysis to predict potential targets and pathways of EIF. Results: EIF delayed danazol-induced early vaginal opening. In the onset model, EIF reduced the increased levels of serum ALP, E2, LH, and FSH; as well as mRNA expressions of GnRH, Netrin-1, and UNC5C. Moreover, long-term administration of EIF not only diminished all impaired factors but also had no effect on the normal development of the animals. The gene set enrichment analysis showed that the targets of EIF are mainly associated with the GnRH signaling and ovarian steroidogenesis pathways. Conclusion: EIF could be used in preclinical research for the treatment of precocious puberty by the inhibition of HPGA pre-maturation.