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Gweon,Seong-Cheol 啓明大學 産業經營硏究所 1976 經營經濟 Vol.7 No.1
A few illustrations of multinational corporation could be found seventy-five or one hundred years ago, but the flowering of their particular form of enterprise did not occur until, after World War II, the increasing trend of foreign trade was revealed (see Table I-1).
Escherichia coli deactivation study controlling the atmospheric pressure plasma discharge conditions
Gweon, B.,Kim, D.B.,Moon, S.Y.,Choe, W. Elsevier 2009 CURRENT APPLIED PHYSICS Vol.9 No.3
Bio-applications of plasma have been widely studied in recent years. However, considering the high interests, the inactivation mechanisms of micro-organisms by plasma have not been clearly explained. The goal of this study was to find the sterilization mechanisms and define the major sterilization factors with the atmospheric pressure radio-frequency helium glow discharge. For the sterilization target the Escherichia coli was used. To begin with the sterilization study, the plasma characteristics were investigated by means of electrical and optical diagnostics. Especially, the gas temperature was controlled under 50<SUP>o</SUP>C by keeping the input power less than 70W to eliminate the thermal effects. Contribution of the UV irradiation from the plasma was studied and it turned out to be negligible. On the other hand, it was found that the sterilization was more effective up to 40% with only 0.15% oxygen addition to the helium supply gas. It indicates that the inactivation process was dominantly controlled by oxygen radicals, rather than heat or UV photons.
Gweon, Hye Mi,Cho, Nariya,Seo, Mirinae,Chu, A Jung,Moon, Woo Kyung Springer International 2014 EUROPEAN RADIOLOGY Vol.24 No.8
<P>To investigate whether kinetic features via magnetic resonance (MR)-computer-aided evaluation (CAE) can improve the positive predictive value (PPV) of morphological descriptors for suspicious lesions at screening breast MRI.</P>
Gweon, Tae-Geun,Kim, Sang Woo,Noh, Yong-Sun,Hwang, Seawon,Kim, Na-Young,Lee, Yoonbum,Lee, Soon-Wook,Lee, Sung Won,Lee, Jong Yul,Lim, Chul-Hyun,Hun Kim, Hyung,Kim, Jin Su,Kyung Cho, Yu,Myung Park, Jae Wolters Kluwer Health 2015 Medicine Vol.94 No.13
<P><B>Abstract</B></P><P>For afternoon colonoscopy, same-day administration of sodium picosulfate, magnesium oxide, and citric acid (PM/Ca) is recommended. However, few studies have evaluated the bowel-cleansing efficacy and safety of this regimen. The aim of this study was to compare the bowel-cleansing efficacy, side effects, and patient's tolerability of a same-day split administration of PM/Ca with polyethylene glycol (PEG) for afternoon colonoscopy.</P><P>Patients were randomly assigned to a PM/Ca group or a PEG group. The PM/Ca group consumed 1 sachet of PM/Ca at 06:00 and 1 sachet of PM/Ca 4 hours before the colonoscopy. They also took 2 tablets of bisacodyl before sleep on the night before. The PEG group consumed 2 L of PEG at 06:00 and 2 L of PEG 4 hours before the colonoscopy. All subjects were instructed to finish the bowel cleanser or fluid at least 2 hours before colonoscopy. All colonoscopic examinations were performed in the afternoon on the same day. The bowel-cleansing efficacy was scored using 2 scales: the Ottawa Bowel Preparation Scale (OBPS) and the Aronchick scale. Ease of using the bowel cleanser was rated from 1 (very easy) to 5 (very difficult).</P><P>Two hundred nine patients underwent colonoscopy. The bowel-cleansing scores by OBPS did not differ between groups (5.0 vs 4.9, <I>P</I> = 0.63). Ease of using the bowel cleanser was superior in the PM/Ca group (<I>P</I> < 0.01).</P><P>The cleansing efficacy of PM/Ca administered on the day of colonoscopy is comparable to that of PEG. Patients prefer PM/Ca.</P>
Gweon-Young Ryu,Jung-Hyu Shin Korean Chemical Society 1991 Bulletin of the Korean Chemical Society Vol.12 No.2
The $^{13}C-NMR$ shifts of a series of para-substituted $8-aryl-tricyclo[3.2.1.0^{2,7}]oct-8-yl$ and $9-aryl-tricyclo[3.3.1.0^{2,8}]-non-9-yl$ cations were measured in $FSO_3H/SO_2ClF\ at\-90^{\circ}$ in order to examine whether the ${\rho}^{C^+}$ values can be used as a measure of the geometric influence on the charge delocalization resulting from ${\rho}$ conjugation in rigid tricyclopropylcarbinyl cations. Plot of the ${\Delta}{\delta}^{C+} shifts against the ${\sigma}^{C+}$ constants revealed excellent linear correlation. The 8-aryl tricyclooctyl systems yielded a ${\rho}^{C+}$ value of -5.00 with r = 0.9962. Previous investigation of the 9-aryl-tricyclononyl systems gave a correlation coefficient of r = 0.9948 with a slope of ${\rho}^{C+}$ = -4.95. A fair parallelism exists between the results of $^{19}F-NMR $ studies and the change of ${\rho}^{C+}$ value in these cations. Consequently, it is established that the ${\rho}^{C+}$ value can be used to explain the mechanism of charge stabilization of the rigid cyclopropylcarbinyl cation such as tricyclo $[3.2.1.0^{2,7}]oct-8-yl$ cation.
Gweon Bomi,Jang Tae-Kyu,Thuy Pham Xuan,Moon Eun-Yi 한국응용약물학회 2022 Biomolecules & Therapeutics(구 응용약물학회지) Vol.30 No.2
The airway epithelium is equipped with the ability to resist respiratory disease development and airway damage, including the migration of airway epithelial cells and the activation of TLR3, which recognizes double-stranded (ds) RNA. Primary cilia on airway epithelial cells are involved in the cell cycle and cell differentiation and repair. In this study, we used Beas-2B human bronchial epithelial cells to investigate the effects of the TLR3 agonist polyinosinic:polycytidylic acid [Poly(I:C)] on airway cell migration and primary cilia (PC) formation. PC formation increased in cells incubated under serum deprivation. Migration was faster in Beas-2B cells pretreated with Poly(I:C) than in control cells, as judged by a wound healing assay, single-cell path tracking, and a Transwell migration assay. No changes in cell migration were observed when the cells were incubated in conditioned medium from Poly(I:C)-treated cells. PC formation was enhanced by Poly(I:C) treatment, but was reduced when the cells were exposed to the ciliogenesis inhibitor ciliobrevin A (CilioA). The inhibition of Beas-2B cell migration by CilioA was also assessed and a slight decrease in ciliogenesis was detected in SARS-CoV-2 spike protein (SP)-treated Beas-2B cells overexpressing ACE2 compared to control cells. Cell migration was decreased by SP but restored by Poly(I:C) treatment. Taken together, our results demonstrate that impaired migration by SP-treated cells can be attenuated by Poly(I:C) treatment, thus increasing airway cell migration through the regulation of ciliogenesis.
Prolongation of Neuromuscular Block of Succinylcholine Chloride by Ketamine in Rabbits
Gweon, Kyeong Deog,Chung, Woon Hyok CATHOLIC MEDICAL CENTER 1980 Bulletin of the Clinical Research Institute Vol.8 No.1
The effect of ketamine on the muscle relaxation produced by succinylcholine chloride was studied. The cause of prolongation of neuromuscular block of succinylcholine chloride by ketamine was discussed. The clinical dose of S.C.C. should be carefully adjusted, if ketamine would be administered.