• Title, Summary, Keyword: Na Woon-gyu

Search Result 9, Processing Time 0.059 seconds

Formal Characteristics of Joseon Films in the Early 1920s (1920년대 초반 조선영화의 형식적 특징)

  • Han, Sang-Eon;Chung, Tae-Soo
    • The Journal of the Korea Contents Association
    • /
    • v.13 no.12
    • /
    • pp.117-125
    • /
    • 2013
  • Early 1920s, Joseon film production began with Japanese colonial rule organization and expanded into civilian. These films were influenced by the documentary film what recorded the scenery and the custom also influenced by kino drama that displayed the place of a dramatic incident. So these films developed into the form emphasize on place. At that time, hollywood serial films were popular. So the first Joseon films shooted a picturesque place and a landmark of the city in the background where heros took a risk. In the style stakes, Joseon films looked very similar to Japanese films. shooted long-take and long-shot, it had rhythm with narration of benshi and emphasized on visual excitation by using color. Early 1920s Joseon films which were similar to Japanese films changed from Japanese style to Hollywood style caused by Na woon-kyu's .

Transesterification and Compatibilization in the Blends of Bisphenol-A Polycarbonate and Poly(trimethylene terephthalate)

  • Na Sang-Kuwon;Kong Byeong-Gi;Choi Changyong;Jang Mi-Kyeong;Nah Jae-Woon;Kim Jung-Gyu;Jo Byung-Wook
    • Macromolecular research
    • /
    • v.13 no.2
    • /
    • pp.88-95
    • /
    • 2005
  • Melt blending of Bisphenol A polycarbonate (PC) and poly(trimethylene terephthalate) (PTT) was carried out over the entire composition range. The mixing time was varied up to 90 min. The resulting samples were analyzed by FT-IR, DSC, XRD, DMTA, $^{1}H NMR$, and SEM. The process of transesterification between the two polymers and their resulting compatibilization were observed. The behaviors of the PTT-rich and PC-rich blends were different and an equilibrium was found to exist. Peculiar behavior, which was different from that of the PTT-rich and PC-rich blends, was exhibited by the 50/50 (PTT/PC) blend.

Synthesis and Antimicrobial Activity of Polyacryloylcephalexine and Polymethacryloylcephalexine (Polyacryloylcephalexine과 Polymethacryloylcephalexine의 합성 및 그 항균작용)

  • Euy Kyung Yu;Gwon, Gyu Hyeok;Wol Suk Cha;Jae-Woon Na
    • Journal of the Korean Chemical Society
    • /
    • v.37 no.7
    • /
    • pp.677-682
    • /
    • 1993
  • Polyacryloylcephalexine and polymethacryloylcephalexine were prepared by the reaction of polyacryloylchloride or polymethacryloyl chloride with cephalexine. The antimicrobial activities of these polymeric drugs were investigated by the common twofold dilution technique and the minimum inhibitory concentration (MIC) of polymeric durgs was also examined. Polyacryloylcephalexine revealed an excellent antibacterial activity against Micrococcus luteus ATCC 9341, Escherichia coli ESS, Bacillus subtilis ATCC 6633, Staphylococcus aureus ATCC 25923, Mycobacterium phlei IFO 3158, Klebsiella pueumouiae KCTC 1560, Escherichia coli KCTC 1039, Salmonella typhimurium KCTC 1925. Polymethacryloylcephalexine revealed an excellent antibacterial activity against Micrococcus luteus ATCC 9341, Klebsiella pueumouiae KCTC 1560, Bacillus subtilis ATCC 6633, Staphylococcus aureus ATCC 25923, Mycobacterium phlei IFO 3158, Escherichia coli KCTC 1039, Escherichia coli ESS, Salmonella typhimurium KCTC 1925.

  • PDF

The Kinetics of Transesterification between Dimethylterephthalate and 1,3-Propanediol (디메틸 테레프탈레이트와 1,3-프로판디올 사이의 에스테르교환반응에 관한 연구)

  • Na, Sang-Kuwon;Kong, Byeong-Gi;Choi, Chang-Yong;Kim, Jung-Gyu;Hong, Wan-Hae;Nah, Jae-Woon
    • Polymer Korea
    • /
    • v.29 no.1
    • /
    • pp.41-47
    • /
    • 2005
  • The transesterification of dimethyl terephthalate (DMT) with 1,3-propanediol (PDO) was investigated in the presence of catalyst, titanium (IV) butoxide (TBO), at 175~190 $^{\circ}C$ . The degree of transesterification reaction was measured by the output of methanol which was distilled from the reactor. The amount of methanol increased as the reaction temperature, molar ratio and catalyst concentration increased. The observed overall rate of the transesterification was third order; first order with respect to DMT, PDO, and the concentration of catalyst, respectively. Using calculated rate constants, the activation energy for transesterification was 26.93 kcal/mole. The melting temperature of bis(2-hydroxytrimethyl) terephthalate (BHTMT) was 85.2$^{\circ}C$ and heat of fusion 141.3 J/g.

Prolonged Expression of Exogenous GFP Gene in the Porcine Embryos generated by Intracytoplasmic Sperm Injection-Mediated Gene Transfer

  • Chung, Hak-Jae;Son, NaRae;Han, Joo-Hee;Park, Chun-Gyu;Kim, Kyung-Woon;Park, Mi-Ryung;Hwang, In-Sul;Park, Jin-Ki;Im, Gi-Sun
    • Journal of Embryo Transfer
    • /
    • v.30 no.3
    • /
    • pp.225-228
    • /
    • 2015
  • Understanding the behavior of transgenes introduced into oocyte or embryos is essential for evaluating the methodologies for transgenic animal production. To date, many studies have reported the production of transgenic pig embryos with, however, low efficiency in environment of blastocyst production. The aim of present study was to determine the expression and duration of transgene transferred by intracytoplasmic sperm injection-mediated gene transfer (ICSI-MGT). Embryos obtained from the ICSI-MGT procedure were analysed for the expression of GFP and then for the transmission of the transgene. Briefly, fresh spermatozoa were bound to exogenous DNA after treatment by Triton X-100 and Lipofectin. When ICSI-MGT was performed using sperm heads with tails removed, the yield of blastocyst (25.3%), treated with Lipofectin (18.8%) and Triton X-100 (19.2%) were observed. Treatments of Lipofectin or Triton X-100 did not further improve the rates of blastocysts. Moreover, the apoptosis rates of embryos were obtained from the control and LIpofectin groups (8.7%, 9.7%, respectively), but were significantly higher in the Triton X-100 group (13.0%). Our results demonstrated that ICSI-MGT caused minimal damage to oocytes that could develop to full term. Moreover, the embryos derived by ICSI-MGT have shown prolonged exogenous DNA expression during preimplantation stage in vivo. However, more efforts will be required to improve the procedures of both sperm treatments cause of high frequency of mosaicisms.

Peptide Properties of Rapid Salted and Fermented Anchovy Sauce Using Various Pretenses 1. Hydrolysis of Anchovy Sauce and Actomyosin by Various Pretenses (단백질 분해효소를 이용하여 제조한 속성 멸치 액젓의 펩티드 특성 1. 단백질 분해효소에 의한 멸치 액젓 및 Actomyosin의 가수분해)

  • KIM In-Soo;CHOI Young-Joon;HEU Min-Soo;CHO Young-Je;IM Yeong-Sun;GU Yeun-Suk;YEO Saeng-Gyu;PARK Jae-Woon
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.32 no.4
    • /
    • pp.481-487
    • /
    • 1999
  • The optimal conditions of enzymatic hydrolysis for preparation of rapid salted and fermented anchovy sauce (SFAS) using various pretenses such as trypsin, chymotrypsin, crude enzyme from squid liver and viscera, Alcalase, Neutrase and Protamex were studied. SFAS prepared with squid viscera had higher level of VBN (173.6 mg/100 g) when stored for 70 days than other samples, and peroxide values were almost equal among all samples during fermentation period. Total amino acids and nonprotein nitrogenous compounds remarkably increased as SFAS treated with Alcalase or Protamex which exhibited higher the hydrolysis rate of $57\%$ at 60 day than others. The optimal pHs of trypsin, chymotryosin, Alcalase, Neutrase and Protamex on anchovy actomyosin were 7.5, 6.5, 6.5, 7.0 and 5.0, respectively. Optimal temperatures of trypsin, chymotryosin, Alcalase and Neutrase were 55, 45, 60 and $55^{\circ}C$, respectively. Otherwise, Protamex activity increased as temperature increased from 20 to $70^{\circ}C$. Protamex had higher $K_m$ (3.545) and $V_{max}$ value (2.688) than others. Protamex affected less by NaCl had $52.5\%$ activity at the fermentation condition of $20^{\circ}C$ and $25\%$ NaCl. Protamex appeared to be very effective for the hydrolysis of crude actomyosin from ancnovy.

  • PDF

Impact of Diltiazem Alone versus Diltiazem with Nitrate on Five-Year Clinical Outcomes in Patients with Significant Coronary Artery Spasm

  • Park, Taeshik;Park, Ji Young;Rha, Seung-Woon;Seo, Hong Seog;Choi, Byoung Geol;Choi, Se Yeon;Byun, Jae Kyeong;Park, Sang-Ho;Park, Eun Jin;Choi, Jah Yeon;Park, Sung Hun;Lee, Jae Joong;Lee, Sunki;Na, Jin Oh;Choi, Cheol Ung;Lim, Hong Euy;Kim, Jin Won;Kim, Eung Ju;Park, Chang Gyu;Oh, Dong Joo
    • Yonsei Medical Journal
    • /
    • v.58 no.1
    • /
    • pp.90-98
    • /
    • 2017
  • Purpose: Calcium channel blockers diltiazem and nitrate have been used as selective coronary vasodilators for patients with significant coronary artery spasm (CAS). However, no study has compared the efficacy of diltiazem alone versus diltiazem with nitrate for long-term clinical outcomes in patients with CAS. Materials and Methods: A total of 2741 consecutive patients without significant coronary artery disease with positive CAS by acetylcholine (Ach) provocation test between November 2004 and May 2014 were enrolled. Significant CAS was defined as a narrowing of >70% by incremental intracoronary injection of 20, 50, and $100{\mu}g$ of Ach into the left coronary artery. Patients were assigned to either the diltiazem group (n=842) or the dual group (diltiazem with nitrate, n=1899) at physician discretion. To adjust for potential confounders, a propensity score matching (PSM) analysis was performed using the logistic regression model. After PSM analysis, two well-balanced groups (811 pairs, n=1622, C-statistic=0.708) were generated. Results: At 5 years, there were similar incidences in primary endpoints, including mortality, myocardial infarction, revascularization, and recurrent angina requiring repeat coronary angiography between the two groups. Diltiazem alone was not an independent predictor for major adverse cardiovascular events or recurrent angina requiring repeat coronary angiography. Conclusion: Despite the expected improvement of endothelial function and the relief of CAS, the combination of diltiazem and nitrate treatment was not superior to diltiazem alone in reducing mortality and cardiovascular events up to 5 years in patients with significant CAS.

Routine Angiographic Follow-Up versus Clinical Follow-Up after Percutaneous Coronary Intervention in Acute Myocardial Infarction

  • Kim, Yong Hoon;Her, Ae-Young;Rha, Seung-Woon;Choi, Byoung Geol;Shim, Minsuk;Choi, Se Yeon;Byun, Jae Kyeong;Li, Hu;Kim, Woohyeun;Kang, Jun Hyuk;Choi, Jah Yeon;Park, Eun Jin;Park, Sung Hun;Lee, Sunki;Na, Jin Oh;Choi, Cheol Ung;Lim, Hong Euy;Kim, Eung Ju;Park, Chang Gyu;Seo, Hong Seog;Oh, Dong Joo
    • Yonsei Medical Journal
    • /
    • v.58 no.4
    • /
    • pp.720-730
    • /
    • 2017
  • Purpose: Differences in the utility of routine angiographic follow-up (RAF) and clinical follow-up (CF) after percutaneous coronary intervention (PCI) in acute myocardial infarction (AMI) are not well understood. The present study aimed to compare the 3-year clinical outcomes of RAF and CF in AMI patients who underwent PCI with drug-eluting stents (DES). Materials and Methods: A total of 774 consecutive AMI patients who underwent PCI with DES were enrolled. RAF was performed at 6 to 9 months after index PCI (n=425). The remaining patients were medically managed and clinically followed (n=349); symptom-driven events were captured. To adjust for any potential confounders, a propensity score matched analysis was performed using a logistic regression model, and two propensity-matched groups (248 pairs, n=496, C-statistic=0.739) were generated. Cumulative clinical outcomes up to 3 years were compared between RAF and CF groups. Results: During the 3-year follow-up period, the cumulative incidences of revascularization [target lesion revascularization: hazard ratio (HR), 2.40; 95% confidence interval (CI), 1.18-4.85; p=0.015, target vessel revascularization (TVR): HR, 3.33; 95% CI, 1.69-6.58; p=0.001, non-TVR: HR, 5.64; 95% CI, 1.90-16.6; p=0.002] and major adverse cardiac events (MACE; HR, 3.32; 95% CI, 1.92-5.73; p<0.001) were significantly higher in the RAF group than the CF group. However, the 3-year incidences of death and myocardial infarction were not different between the two groups. Conclusion: RAF following index PCI with DES in AMI patients was associated with increased incidences of revascularization and MACE. Therefore, CF seems warranted for asymptomatic patients after PCI for AMI.

Effects of Gamma Irradiation on Antioxidant, Antimicrobial Activities and Physical Characteristics of Sargassum thunbergii Extract (지충이 추출물의 항산화, 항균 활성 및 물리적 특성에 미치는 감마선 조사의 영향)

  • Lee, So-Jeong;Song, Eu-Jin;Lee, So-Young;Kim, Koth-Bong-Woo-Ri;Yoon, So-Young;Lee, Chung-Jo;Jung, Ji-Yeon;Park, Na-Bi;Kwak, Ji-Hee;Park, Jin-Gyu;Kim, Jae-Hun;Choi, Jong-Il;Lee, Ju-Woon;Byun, Myung-Woo;Ahn, Dong-Hyun
    • Korean Journal of Food Science and Technology
    • /
    • v.42 no.4
    • /
    • pp.431-437
    • /
    • 2010
  • This study was carried out to determine the effect of gamma irradiation (3-20 kGy) on the antioxidant, antimicrobial activities and physical characteristics of Sargassum thunbergii (ST) extracts. When ST powder was treated by gamma irradiation, the yields and total phenolic compounds (TPC) of water extracts were increased, but radical scavenging activities were not changed. When ST extract was irradiated, the TPC and DPPH radical scavenging activities were increased. In addition, gamma irradiation of ST extract decreased viscosity and removed color. These results suggest that gamma irradiation would be a useful method for improving the physical characteristics of ST extract while maintaining native biological activities.