• 대한수학회지
• /
• 제44권1호
• /
• pp.151-167
• /
• 2007

If k is a subfield of $\mathbb{Q}(\varepsilon_m)$ then the cohomology group $H^2(k(\varepsilon_n)/k)$ is isomorphic to $H^2(k(\varepsilon_{n'})/k)$ with gcd(m, n') = 1. This enables us to reduce a cyclotomic k-algebra over $k(\varepsilon_n)$ to the one over $k(\varepsilon_{n'})$. A radical extension in projective Schur algebra theory is regarded as an analog of cyclotomic extension in Schur algebra theory. We will study a reduction of cohomology group of radical extension and show that a Galois cohomology group of a radical extension is isomorphic to that of a certain subextension of radical extension. We then draw a cohomological characterization of radical group.

• 대한수학회지
• /
• 제57권6호
• /
• pp.1389-1406
• /
• 2020

Let Λ be an Artin algebra and mod Λ the category of finitely generated right Λ-modules. We prove that the radical layer length of Λ is an upper bound for the radical layer length of mod Λ. We give an upper bound for the extension dimension of mod Λ in terms of the injective dimension of a certain class of simple right Λ-modules and the radical layer length of DΛ.

• 농촌지도와개발
• /
• 제1권2호
• /
• pp.165-189
• /
• 1994

Extension service in Korean has radical institutional changes since Febuary, 1991. In new code of local government rules the county extension office is a pact of the local government and extension service is committed to local government. This is resulted from the dillema of coral development`s acts.

• 농촌지도와개발
• /
• 제4권2호
• /
• pp.399-406
• /
• 1997

Extension service in Korea has radical changes in accordance with local autonomy acts, 1994, and reformed rural development acts, 1995. According to these acts, the role of the central government is to arrange local extension service carried out by local extension office, to present basic plans on technical knowledge diffusion or farmers training to local government, and so on. Local extension office is a part of local government, and extension service is commited to the local government.

• 한국식품영양학회지
• /
• 제34권4호
• /
• pp.398-406
• /
• 2021

This study investigated on the nutritional components and physiological activity of four wild vegetables namely Salvia plebeia R. Br., Angelica acutiloba, Gynura procumbens and Saururus chinensis Baill for the development of representative wild vegetables in Chungbuk. Salvia plebeia possessed the highest radical scavenging activity and beta-carotene, but exhibited the lowest α-glucosidase inhibitory activity compared to the other three vegetables. Angelica acutiloba showed high crude protein content and α-glucosidase inhibitory activity, but contained low total polyphenol content, radical scavenging ability and beta-carotene compared to the other three vegetables. Gynura procumbens showed high mineral content, beta-carotene, vitamin K1 content and α-glucosidase inhibitory activity, but showed the lowest total polyphenol content and radical scavenging ability compared to the other three vegetables. Saururus chinensis showed high crude fiber content and total polyphenol content, but contained the lowest mineral and vitamin K1 content. To conclude, it is suggested to use Salvia plebeia or Saururus chinensis as antioxidant food materials and Angelica acutiloba and Gynura procumbens as food materials and sources of α-glucosidase inhibitors. In particular, it is believed that Saururus chinensis, which possessed high content of crude fiber, is suitable for low-calorie food materials such as diet products.

• 한국식품영양학회지
• /
• 제34권6호
• /
• pp.641-649
• /
• 2021

The objective of this study was to evaluate the quality characteristics of mozzarella cheese added wine concentrate. Mozzarella cheese was produced with different additives of wine concentrate which were 0~5%. The pH and the total acidity of the Cheese were analyzed. We also examined the radical scavenging activities for the antioxidant effect of samples and evaluated for their total polyphenol, and total flavonoid contents. The pH of Meoru wine cheese (6.28~6.37) was significantly higher and total acidity tended to decrease compared to that of the control. L^* (lightness) of the wine cheese decreased with increasing amounts of wine concentrates whereas a^* (redness) tended to increase. In the texture profile analysis, Meoru wine cheese showed higher values of hardness, gumminess, and chewiness. The ABTS radical scavenging activity of Meoru wine cheese showed the highest value when wine concentrate amounts were 2%. The DPPH radical scavenging activity was significantly increased in cheese added with wine concentrate. Total polyphenol contents and total flavonoid contents of Meoru wine cheese tended to increase with increasing amounts of wine concentrate. This research result highlights the positive influence of wine concentrate addition in cheese. Also, these results are expected to impact the experience programs in farm wineries.

• 한국식품영양학회지
• /
• 제37권2호
• /
• pp.80-87
• /
• 2024

This study examined the quality characteristics of 10 different lines of native peppers collected from organic farms in Chungbuk province. The study found a strong correlation between the redness (a*) and ASTA values, which both contribute to the perceived quality of peppers. The highest values were observed in the Iyugsa line. The content of capsaicinoid and beta-carotene also showed a positive correlation, with Chilsungcho having the highest statistically significant value. While the total polyphenol content did not correlate with the other indicators, Chilsungcho again had the highest levels. The Yuwolcho line exhibited the highest ABTS radical scavenging ability, while the Eumseongcho line showed the highest DPPH radical scavenging ability. Taking into account the overall bioactivity quality, Chilsungcho had the highest values in terms of total polyphenol, beta-carotene, capsaicinoid, and redness. It also had the second highest total flavonoid content, ABTS, and DPPH radical scavenging activity, all statistically significant. Therefore, Chilsungcho can be considered an excellent choice when considering physiological activity. Furthermore, this study provides valuable information about the unique characteristics of these 10 native pepper lines, which can assist in selecting the appropriate pepper for food manufacturing and serve as a helpful resource for future research.

• 대한수학회논문집
• /
• 제20권1호
• /
• pp.35-49
• /
• 2005

For an extension field K of k, a restriction homomorphism on Brauer k-group B(k) maps Brauer k-algebras to Brauer K- algebras by tensor product. A purpose of this work is to study the restriction map that sends radical (Schur) k-algebras to radical (Schur) K-algebras. And we ask an analogous question with respect to corestriction map on Brauer group B(K) that whether the corestriction map sends radical K-algebras to radical k-algebras.

• 한국식품과학회지
• /
• 제37권3호
• /
• pp.470-473
• /
• 2005

큰느타리버섯을 첨가한 김치를 제조하여 숙성시키면서 품질 특성의 변화를 측정하였다. 큰느타리버섯 김치의 숙성기간에 따른 pH를 측정한 결과 처리간의 차이는 보이지 않았다. 적정산도는 pH와 반대 경향으로 나타났었다. 큰느타리버섯 김치의 총균수와 유산균수는 발효 16일경에 최대치를 보였으며, 그 이후에 감소하였다. Radical 소거능은 대조구 보다는 버섯이 첨가된 처리구에서 높게 나타났으며, 데침 버섯 처리구가 가장 우수하였다. 숙성 6일경의 김치의 관능평가 결과 전반적으로 버섯처리구에서 신맛이 대조구보다 높게 나타났으며, 조직감은 대조구가 가장 좋은 것으로 나타났다. 특히 데침 버섯채 김치가 radical 소거능 및 종합적인 기호도에서 가장 우수한 것으로 나타났다.

• 대한수학회보
• /
• 제42권3호
• /
• pp.453-467
• /
• 2005

Let K be an algebraic number field. If k is the maximal cyclotomic subextension in K then the Schur K-group S(K) is obtained from the Schur k-group S(k) by scalar extension. In the paper we study projective Schur group PS(K) which is a generalization of Schur group, and prove that a projective Schur K-algebra is obtained by scalar extension of a projective Schur k-algebra where k is the maximal radical extension in K with mild condition.