{"title":"Variation in the reproductive rate of Trypoxylus dichotomus (Dymastinae: Sacarabaeidae: Coleoptera) by partition","authors":"W. Seo, Sang-Eun Park, Y. Youn","doi":"10.7744/KJOAS.20200073","DOIUrl":"https://doi.org/10.7744/KJOAS.20200073","url":null,"abstract":"","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"38 1","pages":"867-884"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79837803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Do-Sun Jeon, leesolji, Cho, Sehyun, Seosumin, Kim, Changsoo
{"title":"Effect of salt stress on the anthocyanin content and associated genes in Sorghum bicolor L.","authors":"Do-Sun Jeon, leesolji, Cho, Sehyun, Seosumin, Kim, Changsoo","doi":"10.7744/KJOAS.20200003","DOIUrl":"https://doi.org/10.7744/KJOAS.20200003","url":null,"abstract":"","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"41 1","pages":"105-117"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77843572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sung‐Dug Oh, S. Min, J. K. Kim, Jung-Ho Park, Chang-Gi Kim, Seunghyun Park
{"title":"Risk assessment and evaluation of epidermal growth factor (EGF) transgenic soybean: responses of Cyprinus carpio fed on EGF transgenic soybean","authors":"Sung‐Dug Oh, S. Min, J. K. Kim, Jung-Ho Park, Chang-Gi Kim, Seunghyun Park","doi":"10.7744/KJOAS.20200068","DOIUrl":"https://doi.org/10.7744/KJOAS.20200068","url":null,"abstract":"","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"27 1","pages":"815-827"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73872217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluation and improvement of forest watershed management projects in Korea","authors":"H. Rhee","doi":"10.7744/KJOAS.20200074","DOIUrl":"https://doi.org/10.7744/KJOAS.20200074","url":null,"abstract":"","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"2020 1","pages":"1-17"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78274357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jong Ryul Park, H. Park, Hye-Rin Park, G.H. Yang, Jung Hyun Lee
The physical characteristics of the major varieties of perilla were analyzed to use as basic data for the design of a high-quality, high-efficiency perilla cleaner and stone separator. Because the size, thousand-grain weight, angle of repose, angle of friction, bulk density and terminal velocity of perilla have significant differences according to the perilla variety, the different of characteristics by variety should be considered for performance improvement of a perilla cleaner and stone separator. Therefore the cleaner and stone separator using a sieve could be improved by the application of a detachable sieve or by using equipment such as a 2 3 stage sieve and regulating the slope. Moreover, because differences in the terminal velocity occur due to the differences in the size and thousand-grain weight according to the perilla variety, a blower with an adjustable fan speed was considered for the design of the improved cleaner. Additionally, it was shown that the length of perilla has the greatest correlation based on a comparison of the coefficients of the other characteristics. Accordingly, the length of perilla could be used as a major factor for the fine adjustment and parts replacement of the device. These results can be used as basic data for a high-quality, high-efficiency perilla cleaner and stone separator. In the future, the development of the machine and follow-up studies based on the basic data are needed to determine the optimized operating conditions and mechanism of action.
{"title":"Comparison of the physical characteristics according to the varieties of perilla for the development of a high-quality, high-efficiency cleaner and stone separator","authors":"Jong Ryul Park, H. Park, Hye-Rin Park, G.H. Yang, Jung Hyun Lee","doi":"10.7744/KJOAS.20200058","DOIUrl":"https://doi.org/10.7744/KJOAS.20200058","url":null,"abstract":"The physical characteristics of the major varieties of perilla were analyzed to use as basic data for the design of a high-quality, high-efficiency perilla cleaner and stone separator. Because the size, thousand-grain weight, angle of repose, angle of friction, bulk density and terminal velocity of perilla have significant differences according to the perilla variety, the different of characteristics by variety should be considered for performance improvement of a perilla cleaner and stone separator. Therefore the cleaner and stone separator using a sieve could be improved by the application of a detachable sieve or by using equipment such as a 2 3 stage sieve and regulating the slope. Moreover, because differences in the terminal velocity occur due to the differences in the size and thousand-grain weight according to the perilla variety, a blower with an adjustable fan speed was considered for the design of the improved cleaner. Additionally, it was shown that the length of perilla has the greatest correlation based on a comparison of the coefficients of the other characteristics. Accordingly, the length of perilla could be used as a major factor for the fine adjustment and parts replacement of the device. These results can be used as basic data for a high-quality, high-efficiency perilla cleaner and stone separator. In the future, the development of the machine and follow-up studies based on the basic data are needed to determine the optimized operating conditions and mechanism of action.","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"19 1","pages":"717-726"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88872533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Kim, Minji Kim, Hyeran Kim, S. Ji, Ki-Hyun Kim, J. Chun, Y. Baek, Yoori Lee, J. Jeong, S. Lee
{"title":"Effect of acute heat stress on feed intake and plasma concentrations of tumor necrosis factor-α and free amino acids in growing pigs","authors":"B. Kim, Minji Kim, Hyeran Kim, S. Ji, Ki-Hyun Kim, J. Chun, Y. Baek, Yoori Lee, J. Jeong, S. Lee","doi":"10.7744/KJOAS.20200047","DOIUrl":"https://doi.org/10.7744/KJOAS.20200047","url":null,"abstract":"","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"52 1","pages":"597-604"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89398063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seungsoo Lee, H. An, Young-Teck Hur, Yeonsu Kim, J. Byun
{"title":"Flood prediction in the Namgang Dam basin using a long short-term memory (LSTM) algorithm","authors":"Seungsoo Lee, H. An, Young-Teck Hur, Yeonsu Kim, J. Byun","doi":"10.7744/KJOAS.20200036","DOIUrl":"https://doi.org/10.7744/KJOAS.20200036","url":null,"abstract":"","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"47 1","pages":"471-483"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80768850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hyungjin Shin, Youngjin Kim, Jae Young Lee, Hwang-Hee Kim, S. Jo, Cha Sang-Sun, Seon-ah Hwang, Seung-Kee Lee, Park, Chan-Gi
{"title":"Design, manufacture and field test of a surface water storage tank providing irrigation water to upland crops","authors":"Hyungjin Shin, Youngjin Kim, Jae Young Lee, Hwang-Hee Kim, S. Jo, Cha Sang-Sun, Seon-ah Hwang, Seung-Kee Lee, Park, Chan-Gi","doi":"10.7744/KJOAS.20200089","DOIUrl":"https://doi.org/10.7744/KJOAS.20200089","url":null,"abstract":"","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"41 1","pages":"1057-1069"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85458500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Hyun, Min Jeong Kim, C. Myung, Sanghyun Lee, E. Cho
Alzheimer’s disease (AD) is the most common neurodegenerative disease associated with age, and amyloid beta (Aβ) is known to cause Alzheimer’s disease. In the present study, we investigated the protective effects of Cirsium japonicum var. maackii extract and its fractions against Aβ-induced neurotoxicity in C6 glial cells. The cells treated with Aβ25-35 showed a decrease in cell viability and an increase in reactive oxygen species (ROS) production compared with the non-treated cells. However, the cells treated with the C. japonicum var. maackii extract and its fractions increased the cell viability and inhibited the Aβ-induced ROS production. These results demonstrate the neuroprotective effects of C. japonicum var. maackii against Aβ. To further examine the protective mechanism, we measured inflammation and apoptosis related protein expressions. The cells treated with extract and fractions from C. japonicum var. maackii down-regulated inflammatory related proteins such as cyclooxygenase-2, interleukin (IL)-1β, and IL-6, and attenuated apoptosis related proteins including B-cell lymphoma-2 (Bcl-2) associated X protein/Bcl-2 ratio. In particular, the ethanol and ethylacetate fraction exhibited higher inhibitory effect against ROS production and apoptosis-related protein expressions among the extract and the other fractions. Therefore, this study demonstrated the protective effects of C. japonicum var. maackii extract and its fractions against Aβ-induced neurotoxicity in C6 glial cells through the regulation of oxidative stress, inflammation, and apoptosis, suggesting that it might have potential as a therapeutic for AD.
{"title":"Protective effects of Cirsium japonicum var. maackii against amyloid beta-induced neurotoxicity in C6 glial cells","authors":"K. Hyun, Min Jeong Kim, C. Myung, Sanghyun Lee, E. Cho","doi":"10.7744/kjoas.20190025","DOIUrl":"https://doi.org/10.7744/kjoas.20190025","url":null,"abstract":"Alzheimer’s disease (AD) is the most common neurodegenerative disease associated with age, and amyloid beta (Aβ) is known to cause Alzheimer’s disease. In the present study, we investigated the protective effects of Cirsium japonicum var. maackii extract and its fractions against Aβ-induced neurotoxicity in C6 glial cells. The cells treated with Aβ25-35 showed a decrease in cell viability and an increase in reactive oxygen species (ROS) production compared with the non-treated cells. However, the cells treated with the C. japonicum var. maackii extract and its fractions increased the cell viability and inhibited the Aβ-induced ROS production. These results demonstrate the neuroprotective effects of C. japonicum var. maackii against Aβ. To further examine the protective mechanism, we measured inflammation and apoptosis related protein expressions. The cells treated with extract and fractions from C. japonicum var. maackii down-regulated inflammatory related proteins such as cyclooxygenase-2, interleukin (IL)-1β, and IL-6, and attenuated apoptosis related proteins including B-cell lymphoma-2 (Bcl-2) associated X protein/Bcl-2 ratio. In particular, the ethanol and ethylacetate fraction exhibited higher inhibitory effect against ROS production and apoptosis-related protein expressions among the extract and the other fractions. Therefore, this study demonstrated the protective effects of C. japonicum var. maackii extract and its fractions against Aβ-induced neurotoxicity in C6 glial cells through the regulation of oxidative stress, inflammation, and apoptosis, suggesting that it might have potential as a therapeutic for AD.","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"5 2 1","pages":"369-379"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87694331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Ahn, Shin Jong Suh, 이창우, 최욱진, 김민지, 최장근, Songihwal, 장선식, E. Kwon, Pakr Byung Ki
This study was conducted to evaluate the effects of a composite feed additive (CFA) consisting of vitamin C, vitamin E, selenium, and choline on growth performance, carcass characteristics, and meat properties of Hanwoo steers. Twenty-two late fattening steers were randomly assigned to one of two dietary groups, control (commercial concentrate + rice straw) and treatment (commercial concentrate + rice straw + 50 g of CFA). Average daily gain (ADG) was 4.0% higher in treatment than that in control; however, there was no statistically significant difference. The supplementation of CFA had no effect on overall yield or quality traits of carcass. CFA had no effect on chemical composition, water holding capacity, shear force, cooking loss, or myoglobin values in longissimus muscle; however, the content of α-tocopherol was increased by supplementation of CFA (p < 0.01). The contents of α-linolenic acid and n-3 fatty acids were higher in treatment group than in control (p < 0.01). The ratio of n-6/n-3 fatty acids was decreased by supplementation of CFA (p < 0.01). The supplementation of CFA had no effect on pH or thiobarbituric acid reactive substances (TBARS) values in longissimus muscle (raw); however, TBARS (cooked) values were lower in treatment group than in control during refrigerated storage (p < 0.01). Thus, the results indicate that the supplementation of CFA (vitamin C + vitamin E + selenium + choline) had some positive effects on the increase in α-tocopherol and n-3 fatty in longissimus muscle, without any negative effect on growth performance or carcass characteristics of late fattening Hanwoo steers.
{"title":"Changes in growth performance, carcass characteristics, and meat properties of Hanwoo steers according to supplementation of composite feed additive","authors":"J. Ahn, Shin Jong Suh, 이창우, 최욱진, 김민지, 최장근, Songihwal, 장선식, E. Kwon, Pakr Byung Ki","doi":"10.7744/kjoas.20180070","DOIUrl":"https://doi.org/10.7744/kjoas.20180070","url":null,"abstract":"This study was conducted to evaluate the effects of a composite feed additive (CFA) consisting of vitamin C, vitamin E, selenium, and choline on growth performance, carcass characteristics, and meat properties of Hanwoo steers. Twenty-two late fattening steers were randomly assigned to one of two dietary groups, control (commercial concentrate + rice straw) and treatment (commercial concentrate + rice straw + 50 g of CFA). Average daily gain (ADG) was 4.0% higher in treatment than that in control; however, there was no statistically significant difference. The supplementation of CFA had no effect on overall yield or quality traits of carcass. CFA had no effect on chemical composition, water holding capacity, shear force, cooking loss, or myoglobin values in longissimus muscle; however, the content of α-tocopherol was increased by supplementation of CFA (p < 0.01). The contents of α-linolenic acid and n-3 fatty acids were higher in treatment group than in control (p < 0.01). The ratio of n-6/n-3 fatty acids was decreased by supplementation of CFA (p < 0.01). The supplementation of CFA had no effect on pH or thiobarbituric acid reactive substances (TBARS) values in longissimus muscle (raw); however, TBARS (cooked) values were lower in treatment group than in control during refrigerated storage (p < 0.01). Thus, the results indicate that the supplementation of CFA (vitamin C + vitamin E + selenium + choline) had some positive effects on the increase in α-tocopherol and n-3 fatty in longissimus muscle, without any negative effect on growth performance or carcass characteristics of late fattening Hanwoo steers.","PeriodicalId":17916,"journal":{"name":"Korean Journal of Agricultural Science","volume":"101 1","pages":"11-25"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86815022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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