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Bioconversion of Marin Wastes into Bioplastic Monomers
Jamin SHIN,Jueun JANG,Yebin JU,You-Kyung LEE,Jeongman SEOL,Soo Rin KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
Sargassum horneri is inedible and invasive species of brown macroalgae that expands and drifts in Spring and Summer, causing damages to the ecosystem of the south coast of Korea, especially Jeju island. The Korean government is preventively eliminating a large amounts of S. horneri biomass before reaching to the coast and treating it in landfills or incineration, but this causes another environmental problem. In the present study, S. honeri biomass was tested as a raw material for the biological production of lactic acid used in various fields such as food additives, cosmetic and chemical industry. Simultaneous saccharification and fermentation (SSF) with lactic acid-producing engineered yeast was optimized in various conditions including type of commercial cellulases, solid loading, and scale-up fermentation. Finally, lactic acid was produced at a yield of 0.24 g lactic acid/g dried biomass and productivity of 0.73 g lactic acid/L-h, suggesting an industrial potential to biologically utilize S. honeri coastal waste.
Development of Clarification Methods for Apple Cider Production from Fresh Apples
Jamin SHIN,Jueun JANG,Soo Rin KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
The apple is one of the antioxidant-rich crops which is widely grown up in the temperate climates, so many processed foods/beverages using apples have been developed. Among beverages the cider and apple-fermented alcoholic beverage, are commonly consumed beverages in Europe and Northern America. However, in the apple extract producing process of apple juice and cider, there is a low extract yield problem because of high pectin and glucan contents in apples. In this study, we made apple hydrolysates by treated pectinase and glucanase and filtrated the hydrolysate of apple extracts through centrifuge and syringe. As a result, through enzyme pre-treatment and treatment time optimizing, we improved the clarification process in apple cider manufacture. In a sensory test, apple cider which is made by the improved process has advantages than old one. In this study, we present optimized clarification process conditions in apple cider production.
@@@@@Double-stranded RNA Induction as a Potential Dynamic Biomarker for DNA-demethylating Agents
Minjeong KANG,Kharbash RAISA,Jamin BYUN,Jaemin JEON,Ali AHSAN,Doyeong KU,Jimin YOON,Yongsuk KU,Jooyeon SOHN,Seungjae LEE,Dongyeop SHIN,Youngil KOH,Sungsoo YOON,Junshik HONG,Yoosik KIM 한국생물공학회 2023 한국생물공학회 학술대회 Vol.2023 No.4