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산수유 꽃 추출물의 항산화 활성에 키토산이 미치는 영향
유보람,김진미,최지선,정병옥,정석진 한국키틴키토산학회 2014 한국키틴키토산학회지 Vol.19 No.1
The purpose of this study was to investigate the antioxidant activities of the D.W., EtOH, MeOH, BuOH, and EtOAc extractsof Cornus officinalis flowers (COF), and COF extracts+Chitosan (Cs). As a result, the yield of extract showed the highest valuein an D.W. extract. The total polyphenol, flavonoid, and tannin showed 98.95 mg GAE/g, 17.96 mg QE/g, and 81.26 mg TAE/gat the EtOAc extract. The COF extracts at a concentration of 1 mg/mL, the ABTS radical scavenging activity and FRAP assayindicated the hightest activity with EtOAc extract. And DPPH was high value in an EtOH extract (90.57%). We knew that theEtOAc extract is good antioxidant potential. It can be seen that these effects are due to the polyphenol and flavonoid. Theaddition of Cs in the extracts of COF improved the DPPH and ABTS radical scavenging activity. As the result, extracts of COFand Cs are going to be used as a nature antioxidant and antioxidants substance for functional foods. 추출용매에 따른 산수유 꽃의 항산화활성을 알아보고자 총polyphenol, flavonoid 및 tannin의 함량을 조사하고, 꽃 추출물, 꽃 추출물과+Cs 혼합용액의 DPPH radical 소거활성, ABTS radical 소거활성과 FRAP을 분석하였다. 추출물의 수율은 D.W.가 38.9%로 가장 높았으며, 총 polyphenol, flavonoid, tannin 모두 EtOAc가 다른 추출 용매에 비하여 높은 함량을 나타내었다. D.W., EtOH, MeOH, BuOH, EtOAc 추출물의 1 mg/mL 농도에서 DPPH radical 소거활성은 87.02~ 90.57%의 소거활성을 나타났으며, ABTS radical 소거활성은95.29~96.79%의 높은 활성을 나타냈다. FRAP 활성은 1 mg/ mL 농도에서 흡광도가 0.92~1.72로 EtOAc가 가장 높은 흡광도를 나타내었다. DPPH, ABTS radical scavenging activity 및 FRAP assay 실험에서 추출물의 농도가 증가함에 따라 항산화력도 증가하였다. 추출물과 Cs 혼합용액의 DPPH 소거활성은 추출물과 Cs 혼합비율이 9:1일 때 EtOH과 Cs 혼합용액이 가장 높은 소거활성을 나타내었으며, ABTS는 혼합비율이 6:4일 때 EtOAc과 Cs 혼합용액이 가장 높은 소거활성을 나타내었으나 FRAP는 EtOAc 추출물에서 가장 높은 항산화력을 보였다. 이상의 결과로 보아 산수유 꽃 추출물의 우수한 항산화력을 나타내었고 키토산과 혼용할 경우 일정농도에서 상승작용을 하는 것으로 보아 기능성식품을 위한 천연항산화 물질로써 활용이 가능할 것으로 사료된다.
재정 투명성과 정부 간 자원배분: 특별교부세 지역현안수요분을 중심으로
유보람,조정래 한국지방정부학회 2024 지방정부연구 Vol.27 No.4
This study examined the impact of enhancing fiscal transparency on intergovernmental resource allocation. To do so, it investigated whether the revision of the Local Subsidy Act of 2009 and the disclosure of allocation information, focusing on the allocation of Special Revenue Sharing (SRS), brought about changes in the determinants of intergovernmental resource allocation. The SRS had faced criticism for having been arbitrarily distributed in the absence of reasonable allocation criteria. For this reason, efforts were made to enhance fiscal transparency through the 2009 revision of the Local Subsidy Act and the disclosure of allocation information. For empirical analysis, this study examined the changes in the mechanism of intergovernmental resource allocation before and after 2009 when fiscal transparency was enhanced. The analysis included 224 local governments, and a fixed effect model was used to analyze panel data of 2005, 2007, 2011, 2013, 2015, 2017, 2019. During this period, the amount of SRS allocated to each local government was used as the dependent variable, while political and socio-economic factors of each local government were employed as independent variables in the analytical model. As political factors this study used the number of terms, political parties, committee affiliations of members of National Assembly and the political party, reelection status, hometown, and approval rating of the heads of local governments. Fiscal self-reliance, population, the proportion of elderly population, and per capita property tax burden were used as socio-economic factors. The analysis results showed that after the enhancement of fiscal transparency in 2009, the role of local government heads decreased, while the role of members of National Assembly strengthened in intergovernmental resource allocation. It also revealed that a wider range of socio-economic factors were considered in resource allocation. In conclusion, while fiscal transparency did not exclude political influence from intergovernmental resource allocation, it empirically confirmed that socio-economic factors representing the financial demands of local governments were being considered more actively.