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Extraction Procedures for Free Radical Scavenging Activity from Noni Fruit (Morinda citrifolia)
Mi-Kyung Gwak,Hee-Sun Choi,Benya Manochai,Jeong-Hwa Hong 한국약용작물학회 2011 한국약용작물학회지 Vol.19 No.1
In this study, we investigated maximum yield of radical scavenging activity (RSA) using each of various extraction solvents and procedure from noni friut (Morinda citrifolia). Noni fruits were either sun-dried (FS) or hot-air dried (FO) at 60℃ after steam blanching. For optimum aqueous extraction, noni fruits should be sun dried and autoclave extraction time should not be over 30 min to produce extraction with high RSA with low cost. In case of 50% ethanol extraction, reflux extracts of FS and FO resulted in IC50 of 1.92 mg/mL and 3.06 mg/mL at 8 hr. When IC50 values were lower than 5 mg/mL, coefficient of correlation was 0.71 indicating that 71% of the phenolic antioxidants in noni fruits were accounted for the activity by scavenging free DPPH. However, coefficient of correlation significantly decreased to 0.63 over IC50 values of 5 mg/mL. Autoclave extraction contained chlorogenic acid of 14.69 μg/mL and scopoletin of 3.86 μg/mL. Reflux extraction showed all three compounds, chlorogenic acid (26.19 μg/mL), quercetin (19.59 μg/mL), and scopoletin (17.4 μg/mL). Therefore, the result of this study indicated that the potential antioxidant activities and functional values were obtained significantly with reflux extraction from noni fruit.
Propofol/Rocuronium을 이용한 신속 기관 내 삽관 시 Remifentanil의 세 가지 지속 정주 용량에서의 혈역학적 반응
곽미숙 ( Mi Sook Gwak ),최수주 ( Soo Joo Choi ),윤진선 ( Jin Sun Yoon ),이준용 ( Jun Yong Lee ),양미경 ( Mi Kyung Yang ),김갑수 ( Gaab Soo Kim ),이상민 ( Sang Min Lee ),김명희 ( Myung Hee Kim ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.50 No.4
Background: This study compared the effect of the three different infusion doses of remifentanil on the hemodynamic response to rapid sequence anesthesia induction and tracheal intubation. Methods: In this prospective, randomized double-blind study, 60 ASA I or II patients without any airway abnormalities, who were scheduled to undergo elective surgery requiring endotracheal intubation, were allocated to receive remifentanil 0.25, 0.5, or 1.0μg/kg/min. Anesthesia was induced with a remifentanil infusion and propofol 2.0 mg/kg. Rocuronium 1.0 mg/kg was given after a loss of consciousness and endotracheal intubation was performed 1 min after the rocuronium injection. The remifentanil infusion was stopped immediately before intubation. The noninvasive blood pressure (BP) and heart rate (HR) were recorded before induction (baseline), immediately before intubation, and at 1 min intervals until 5 min after intubation. Results: The HR and BP measured immediately before intubation decreased significantly in the three doses. The HR was similar in the three doses, and the BP was significantly different only between the 0.25 and 1.0μg/kg/min doses (P < 0.05). The hemodynamic response to endotracheal intubation was very well blunted in 0.5 and 1.0μg/kg/min, but not in 0.25μg/kg/min. The HR and BP increased significantly 1 min after intubation in the 0.25μg/kg/min (P < 0.05). There were no significant differences between the 0.5 and 1.0μg/kg/min doses until 5 min after intubation. Conclusions: Remifentanil 0.5μg/kg/min infusion without a bolus provides excellent hemodynamic stability for a rapid sequence endotracheal intubation using propofol and rocuronium. There are no advantages in using remifentanil doses higher than 0.5μg/ kg/min. (Korean J Anesthesiol 2006; 50: 385~9)
Gwak, Geum-Youn,Yoon, Jung-Hwan,Yu, Su Jong,Park, Su Cheol,Jang, Ja June,Lee, Kyoung Bun,Lee, Sung-Hee,Lee, Soo-Mi,Shin, Chan Soo,Suh, Kyung-Suk,Lee, Hyo-Suk National Hellenic Research Foundation 2006 Oncology reports Vol.15 No.5
<P>N-cadherin signaling has recently been implicated in the progression of certain epithelial tumors by promoting invasion and dissemination of cancer cells. N-cadherin has also been reported to exert an anti-apoptotic effect. In this study, we attempted to evaluate the participation of this adhesion molecule in the progression of human hepatocellular carcinomas (HCCs) by analyzing its anti-apoptotic signaling as well as its prognostic implication in HCC patients. N-cadherin was found to be expressed in human HCCs. We established a stable human HCC cell line expressing a truncated N-cadherin, NCaddeltaC, with a dominant-negative action. NCaddeltaC-expressing cells were more susceptible to bile acid-induced apoptosis than control cells. N-cadherin was found to complex with procaspase-8, and this association was diminished in NCaddeltaC-expressing cells, leading to enhanced procaspase-8 recruitment to death-inducing signaling complex following bile acid treatment. A clinicopathological analysis in patients who had undergone surgical resection for HCC revealed that tumoral N-cadherin up-regulation was significantly related to poor recurrence-free and overall survival. Our findings implicate N-cadherin signaling as contributing to HCC progression by exerting anti-apoptotic effects. Thus, we suggest that the selective interruption of this signaling may have therapeutic potential.</P>
양미경,정익수,곽미숙,김갑수,심우석,함태수 대한마취과학회 2001 Korean Journal of Anesthesiology Vol.40 No.5
Background: Compared with blockers mounted on the endotracheal tube, (a conjugated blocker), studies about blockers that are independent of a single-lumen tube, (a separated blocker) are rare. This study's object was to find several characteristics about these new blokers. Methods: We compared the peak and plateau airway pressures in intubated patients (n = 30) with, (group EB) and without, (group E) blockers. We measured the depth of the blockers and the pressures of the balloon of the blockers. Balloon pressures were measured twice outside and inside of the E-tube with 7 ml of air. All of these measurements were done in the supine position with 1 L/min flow rate. The frequency of malposition, the score of the lung collapse, and bronchial mucosa change were checked thereafter. Results: The peak airway pressures of group EB were significantly higher than those of group E (P<0.05). However, the plateau pressures of both groups were not different. The depth of the blockers was 52.0±1.8 cm, and the balloon pressures of the blockers were 124±22 and 139±20 mmHg, respectively. Six patients needed additional bronchoscopy because of malposition. The lung collapse score was good in 17 patients, fiar in 10 patients, and poor in 3 patients. There was not any severe bronchial mucosa damage. Conclusions: Understanding the characteristics of these new blockers, we can consider the use of them in some situations in which the use of a double-lumen tube is impossible or inconvenient.
Oh, Se-Kyung,Gwak, Chung-Lee,Lee, Mi-Young Korea Data Strategy Society 2011 Journal of information technology applications & m Vol.18 No.3
Korea professional baseball industry has grown to take the lion's share of the domestic sports industry, but still does not make break even. The purpose of this study is to examine the financial impact of adopting the Customer Relation Management (CRM) approach on the profitability of Korea professional baseball industry. We use a measuring tool called entropy used in ID3 decision tree algorithm. In the paper, we specify five the most important factors that affect spectator satisfaction based on the previous literature, perform survey analysis, calculate entropy values, and find the results. We predicted the change in revenues when we adopt CRM by checking the spectators' willingness to pay more when the conditions of each factor are improved. We find that we can reap significant fruits of the effect of CRM introduction through enhancing 'game content factor' and 'game promotion factor' among the five factors. We also find that we can increase the revenues of domestic professional baseball teams to 2.4 times or 2.1 times the current level if we manage intensively those two factors respectively. It is very surprising to see that the improvement in total revenues makes both ends meet for domestic professional baseball teams. This clearly demonstrates the effectiveness of CRM approach in improving the profitability of organizations.