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        검색결과 6

        1.
        2024.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        이 연구의 목적은 척추 자기공명영상 검사 시, 검사시간을 단축할 수 있는 기법인 SENSE와 CS-SENSE를 경추, 흉추, 요추 검사 시 어떤 기법을 적용하는 것이 효과적인지 알아보기 위함이다. 본 연구는 2022년 10월부터 2023년 3월까지 척추질환 및 의심 환자 102명을 대상으로 분석하였다. 사용된 장비는 필립스 사의 3.0T Ingenia Elition X와 20채널 두경부 코일과 44 채널 척추 코일을 사용하였다. 본 연구는 축상 T2강조 고속스핀에코를 SENSE와 CS-SENSE factor 1.5, 2, 3으로 각각 영상을 획득하고, 정량평가는 신호대잡음비와 대조대잡음비를 각 factor 별로 대응 표본 t-test를 진행하였고, 정성평가는 2명의 평가자의 평가점수를 Kruskal-wallis test로 비교하였다. 정량평가 결과, SENSE보다 CS-SENSE가 신호대잡음비와 대조대잡음비가 높게 나왔다. 정성평가 결과, 경추, 요 추는 CS-SENSE 사용 시 평가점수가 높게 나왔고, 흉추는 SENSE 사용 시 평가점수가 높게 나왔다. 결론적으로 척추 MRI 검사 시, 경추, 요추는 CS-SENSE를, 흉추는 SENSE를 사용하는 것이 효과적이다.
        4,200원
        2.
        2017.09 KCI 등재 서비스 종료(열람 제한)
        Present study aimed to determine the effect of ‘bitter melon’, a popularly used fruit in Bangladesh and several other Asian countries, on high-fat-diet-induced type 2 diabetes. To investigate the effect, ethanol extract from bitter melon (BME) as a dietary supplement with mouse chow was used. BME was found to significantly attenuate the high-fat diet (HFD) -induced body weight and total fat mass. BME also effectively reduced the insulin resistance induced by the HFD. Furthermore, dietary supplementation of BME was highly effective in increasing insulin sensitivity and reducing hepatic fat and obesity. These results indicate that BME could be effective in attenuating type 2 diabetes and could therefore be a preventive measure against type 2 diabetes.
        3.
        2015.05 서비스 종료(열람 제한)
        Livestock wastewater has high potential as one of energy resources because this wastewater is including high organic matter. Therefore the studies attempting to bio-gasification and bio-electricity generation using livestock wastewater is being tried. The pre-treatment system used in this study was the purpose to control the ammonia nitrogen in conjunction with the system and the microbial fuel cell. Because ammonia nitrogen is to inhibit the electricity generation efficiency of microbial fuel cell. These studies were to ascertain the effect of oxidants on the nitrogen removal in the pre-treatment system using catalyst and microbubbles to treat the ammonia nitrogen. The three kinds of oxidant such as air, oxygen (O2), and hydrogen peroxide (H2O2) were used to know the ammonia and nitrate nitrogen removal. This system was operated with four kinds of conditions. First method is O2 gas with 100 mL/min with 1ml of 30% H2O2 was supplied to the wastewater. A second method, the O2, with 400 and 1,000 mL/min was supplied through the flow meter before livestock wastewater was flow in the reactor. The last method, air was supplied 800 mL/min. The nitrate removal had no significant difference all conditions except the air supply. On the other hand, the ammonia and nitrate nitrogen removal when oxygen was supplied with 1000 mL O2/min was higher than that of the other conditions. The removal rate when air was supplied 800 mL/min was similar to the value in the supplied with 400 ml O2/min. This result showed that oxidant was important factor to improve the ammonia nitrogen removal rate.
        4.
        2013.12 KCI 등재 서비스 종료(열람 제한)
        Transforming growth factor (TGF) family is well known to induce the chondrogenic differentiation of mesenchymal stem cells (MSC). However, the precise signal transduction pathways and underlying factors are not well known. Thus the present study aims to evaluate the possible role of C2 domain in the chondrogenic differentiation of human mesenchymal stem cells. To this end, 145 C2 domains in the adenovirus were individually transfected to hMSC, and morphological changes were examined. Among 145 C2 domains, C2 domain of protein kinase C eta (PKCη) was selected as a possible chondrogenic differentiation factor for hMSC. To confirm this possibility, we treated TGFβ3, a well known chondrogenic differentiation factor of hMSC, and examined the increased-expression of glycosaminoglycan (GAG), collagen type II (COL II) as well as PKCη using PT-PCR, immunocytochemistry and Western blot analysis. To further evaluation of C2 domain of PKCη, we examined morphological changes, expressions of GAG and COL II after transfection of PKCη -C2 domain in hMSC. Overexpression of PKCη-C2 domain induced morphological change and increased GAG and COL II expressions. The present results demonstrate that PKCη involves in the TGF-β3-induced chondrogenic differentiation of hMSC, and C2 domain of PKCη has important role in this process.