Food Industries Research Institute, Km 8 Nguyen Trai Road, Thanh xuan, Dong da, Hanoi, Vietnam.
World J Microbiol Biotechnol. 1992 Sep;8(5):505-8. doi: 10.1007/BF01201949.
Of 25 bacterial isolates from Vietnamese soils, two were identified asBacillus stearothermophilus and one asThermoactinomyces thalpophilus, both thermophilic, amylase-producing bacteria. Amylase activity was highest in the presence of cassava starch as carbon source and (NH4)2HPO4 as nitrogen source. The strains exhibit a high amylase productivity within the first 5 to 7 h of cultivation at 55°C. The crude enzyme had optima of pH 6.5 and 70°C.
从越南土壤中分离的 25 株细菌中，有 2 株被鉴定为嗜热脂肪芽孢杆菌，1 株为嗜热放线菌，均为产淀粉酶的嗜热菌。在以木薯淀粉为碳源和（NH4）2HPO4为氮源的条件下，淀粉酶活性最高。在 55°C 下培养的前 5 至 7 小时内，菌株表现出较高的淀粉酶生产力。粗酶的最适 pH 值为 6.5，最适温度为 70°C。
