• Title/Summary/Keyword: barrel

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Effect of Process Variables and Packaging on Vitamin C Content of Extruded Cornstarch Matrix (압출성형 옥수수 전분 매트릭스 내부의 비타민 C 함량에 미치는 압출성형 공정변수와 포장방법의 영향)

  • Han, Jae-Yoon;Kim, Mi-Hwan;Park, Jong-Hwan;Kim, Seok-Joong;Park, Hee-Yong;Koksel, Hamit;Ryu, Gi-Hyung
    • Food Science and Preservation
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    • v.14 no.5
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    • pp.451-456
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    • 2007

  • The vitamin C content in extruded comstarch matrix was shown to depend on extrusion process variables (barrel temperature and water content), the packaging method, and the storage period. In addition, loss rates of vitamin C under different processing conditions were calculated. Extrusion process variable were barrel temperature ($80^{\circ}C,\;90^{\circ}C,\;100^{\circ}C$ and $110^{\circ}C$), and water content (25% 30% both w/w). The vitamin C content decreased as barrel temperature increased from $80^{\circ}C$ to $110^{\circ}C$ and water content increased from 25% to 30% when either LDPE plastic film packaging or ON film vacuum packaging were employed. As barrel temperature and water content increased, vitamin C decreased in comstarch packed in either LDPE film or ON film. As temperature increased, vitamin C loss rate increased under both packaging conditions, but the loss tate was only 50% of the LDPE film packaging rate when ON film vacuum packaging was used. In conclusion, the higher the temperature, and the greater the water content, the less vitamin C was inactivated during extrusion cooking, although the loss rah of vitamin C became faster as temperature and water content rose. In conclusion, extrusion process could be applied for making vitamin C matrix to extend vitamin C preservation.

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Assessment of a rain barrel sharing network in Korea using storage-reliability-yield relationship (저류용량-신뢰도-수요량 관계를 이용한 레인배럴 공유 네트워크의 국내 성능 평가)

  • Kwon, Youjeong;Seo, Yongwon;Park, Chang Kun
    • Journal of Korea Water Resources Association
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    • v.53 no.11
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    • pp.961-971
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    • 2020

  • The Intergovernmental Panel on Climate Change (IPCC) reported that the amount of precipitation in South Korea would increase regardless of the reduction of Greenhouse Gas (GHG) emissions. Moreover, the temporal and spatial rainfall variation would also increase in the future. Due to the geographic allocation of Korea, more than 80% of the annual precipitation occurs in the wet season from early July to late September. It is expected that the average precipitation in this period will increase from the Representative Concentration Pathways (RCP) scenario projections. These predictions imply an increased variability of available water resources. Rainwater harvesting system is widely used as an alternative water resources today. This study introduces a RBSN (rain barrel sharing network) as an efficient way to utilize alternative water resources under the RCP scenarios. The concept of RBSN combines individual rainwater harvesting system to a sharing network, which make the whole system more reliable. This study evaluated a RBSN in South Korea composed of four users based on a storage-reliability-yield (SRY) relationship. The study area comprises all 17 provincal areas in South Korea. The result showed a huge benefit from a RBSN in Korea under the historical rainfall condition. Even in the climate change condition, the results showed that a RBSN is still beneficial but the changes in reliability are different depending on provinces in Korea. The results of this study shows that a RBSN is a very effective and alternative measure that can deal with the impacts of climate change in the near future.

  • https://doi.org/10.3741/JKWRA.2020.53.11.961 인용 PDF KSCI