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Wan Abd Al Qadr Imad Wan-Mohtar,Safuan Ab Kadir,Sarina Abdul Halim Lim,Zul Ilham,Siti Hajar-Azhari,Nazamid Saari 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.6
In submerged-liquid fermentation, seven keyparameters were assessed using one-factor-at-a-time toobtain the highest GABA yield using an industrial soysauce koji Aspergillus oryzae strain NSK (AOSNSK). AOSNSK generated maximum GABA at 30 C (194 mg/L) and initial pH 5 (231 mg/L), thus was able to utilizesucrose (327 mg/L of GABA) for carbon source. Sucrose at100 g/L, improved GABA production at 646 mg/L. Singlenitrogen sources failed to improve GABA production,however a combination of yeast extract (YE) and glutamicacid (GA) improved GABA at 646.78 mg/L. Carbon-tonitrogenratio (C8:N3) produced the highest cell (24.01 g/L) and GABA at a minimal time of 216 h. The keyparameters of 30 C, initial pH 5, 100 g/L of sucrose,combination YE and GA, and C8:N3 generated the highestGABA (3278.31 mg/L) in a koji fermentation. AOSNSKpromisingly showed for the development of a new GABArichsoy sauce.