• Title/Summary/Keyword: crop condition

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Optimization of Cellulase Production from Paenibacillus jamilae BRC 15-1 (Paenibacillus jamilae BRC15-1의 Cellulase 생산 최적화)

  • Cha, Young-Lok;Yoon, Young-Mi;Yoon, Ha-Yan;Kim, Jung Kon;Yang, Ji-Young;Na, Han-Beur;Ahn, Jong-Woong;Moon, Youn-Ho;Choi, In-Hu;Yu, Gyeong-Dan;Lee, Ji-Eun;An, Gi Hong;Lee, Kyeong-Bo
    • KSBB Journal
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    • v.30 no.6
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    • pp.283-290
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    • 2015

  • In this study was selected the cellulolytic microorganism and investigated optimum condition of cellulase production for the cellulosic bioethanol production. A bacterial strain Paenibacillus jamilae BRC15-1, was isolated from soil of domestic reclaimed land. For optimizing cellulase production from the selected strain, various culture parameters were investigated such as culture medium, pH (pH 4~10), temperature ($25{\sim}50^{\circ}C$) and culture time (2~72 h). As a result, P. jamilae BRC15-1 efficiently produced cellulase from cellulosic biomass under following conditions: 24 h of culture time (pH 7, $40^{\circ}C$) in manufactured media of CMC (carboxymethyl cellulose) with peptone. Optimum saccharifying condition of crude enzyme produced from P. jamilae BRC15-1 was identified on pH 6 and $40^{\circ}C$ of reaction temperature, respectively. This crude enzyme from P. jamilae BRC15-1 was used for saccharification of pretreated sweet sorghum (Sorghum bicolor var. dulciusculum Ohwi) bagasse under the optimal condition. Finally, pretreated sweet sorghum bagasse including 0.1 g of glucan was saccharified by crude enzyme of P. jamilae BRC15-1 into 2.75 mg glucose, 0.79 mg xylose and 1.12 mg arabinose.

  • https://doi.org/10.7841/ksbbj.2015.30.6.283 인용 PDF KSCI

Milling Condition and Harvesting Time for Improving Milling Recovery of Head Foxtail Millet Grain (완전미도정수율 향상을 위한 조(Setaria italica Beauvois) 도정방법 및 수확시기)

  • Lee, Jae-Saeng;Ko, Jee-Yeon;Song, Seuk-Bo;Woo, Koan-Sik;Kim, Jung-In;Kim, Hyun-Young;Jung, Tae-Wook;Kwak, Do-Yeon;Oh, In-Seok;Kim, Ki-Young
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.57 no.3
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    • pp.280-285
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    • 2012

  • This study was conducted to establish proper milling condition and harvesting time for improving the milling recovery of head foxtail millet grain. Brown foxtail millet recovery and the percentage of head foxtail millet recovery were significantly different according to the number of hulling and milling time. Also, the interaction of these factors had influence on brown foxtail millet recovery and the percentage of head foxtail millet recovery. To improve the percentage of head foxtail millet recovery, it was effective to hull grain twice and mill for 1.30 minute. 1000-grain weight of brown foxtail millet, brown foxtail millet recovery, hardness of brown foxtail millet, milling recovery, and the percentage of milling recovery of head foxtail millet grain were significantly different according to harvesting day after heading. For improving the ratio of ripened grain and the percentage of recovery of head foxtail millet, it is recommended to harvest 45 days (accumulated temperature : $1,148^{\circ}C$) after heading (DAH) in early maturing Hwangkeumjo, 50 DAH (accumulated temperature : $1,150^{\circ}C$) in mid-late maturing Samdamae and Kyeongkwan1, and 55 DAH (accumulated temperature : $1,168^{\circ}C$) in late maturing Samdachal.

  • https://doi.org/10.7740/kjcs.2012.57.3.280 인용 PDF KSCI