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Bioprocess Engineering 基因重組﹝ PCR, host selection ﹞ 或 微生物篩選 ﹝ plasmid selection ﹞ Lab. 生產工廠生產 前處理﹝ 殺菌等 ﹞生化反應器破碎細胞 分離及純化 Recombinant protein metabolites 細胞固定化﹝ 酵 素固定化 ﹞ 04.1 養菌 &bioreactor
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﹝一﹞前處理 1. 高溫高壓﹝ 125 ℃ ~140 ℃ ﹞ heat sterilizer, auto clave 2. 化學藥品 酒精, detergent ﹝ SDS … 等﹞ 3. 過濾 殺菌:
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colony
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Isolation of single colony
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Antibiotics resistance
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rich media defined media Determining cell mass dry weight optical density (O.D.) spectrophotometer O.D. 550 O.D. 600
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﹝二﹞生化反應器 1.Fermentor 發酵槽 ﹝ batch ﹞ 2.chemostat
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Chemostat: cellular growth is usually limited by one essential nutrient, and other nutrients are in excess (P183,184)
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Turbidostat: The cell concentration in the culture vessel is maintained constant by monitoring the optical density of the culture and controlling the feed flow pate. (P184)
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The ideal chemostat:
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使用 chemostat 為 bioreactor ,其產量將遠 大於 batch 。可是為什麼工業界使用 batch 的比 率遠高於 chemostat ? 1.Secondary products 2.Genetic instability 3.Operability and reliability 4.Market economics
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