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通过细菌、真菌的发酵作用制作食品对于微生物知识较少的初二学生来说是一个较难理解的问题，本文通过引入葡萄酒的简易制作方法，取代教材中甜酒的制作，突破了发酵作用这一教学难点，对如何进行初中生物学探究式教学进行了一些有益的尝试。 相似文献
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Effective extraction of elastase from Bacillus sp. fermentation broth using aqueous two-phase system 总被引：1，自引：0，他引：1
INTRODUCTION Aqueous two-phase system (ATPS) is widely used in biochemistry and biotechnology for purifica- tion of proteins (Diamond and Hsu, 1992; Balasubramaniam et al., 2003), enzymes (Pan et al., 2001; Bim and Franco, 2000), amino acids (Li et al., 2002), antibiotics (Yang et al., 1994; Guan et al., 1994), nucleic acids (Ohlsson et al., 1978; Kimura, 2000), aroma compounds (Marco et al., 2000) and lactic acid (Planas et al., 1998). ATPS is mainly composed of two-incompatible p… 相似文献
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宏观农业中微生物的生产作用，消费作用，可提高到再生资源的高度来认识，在农业生产中，充分开发和利用微生物资源，可以提高农业生产的经济效益，促进农业经济的发展。 相似文献
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本文简要分析环境描写及其发酵作用,对顺向思维和逆向思维顺向思维的环境描写在文学作品中的发酵作用进行阐述,认为小说里的环境描写对促进人物性格生成以至成熟至关重要,建议积极融入生活,提高感知能力。 相似文献
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"果酒的制作"是人教版高中生物选修1《生物技术实践》专题1"传统发酵技术的应用"的课题1.本课题旨在帮助学生理解发酵作用的原理,学习发酵技术.果酒的制作时间长,需要12天,且材料受季节限制,成本高.在教学中以酒酿的制作代替它,缩短了实验周期,只需2-3天,且糯米价格便宜、平时都能买到.【教学过程】一、课前准备教师:用安琪牌甜酒曲自制酒酿.学生:查询有关酒酿的知识. 相似文献
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The production of butyric acid by Clostridium butyricum ZJUCB at various pH values was investigated. In order to study the effect of pH on cell growth, butyric acid biosynthesis and reducing sugar consumption, different cultivation pH values ranging from 6.0 to 7.5 were evaluated in 5-L bioreactor. In controlled pH batch fermentation, the optimum pH for cell growth and butyric acid production was 6.5 with a cell yield of 3.65 g/L and butyric acid yield of 12.25 g/L. Based on these results, this study then compared batch and fed-batch fermentation of butyric acid production at pH 6.5. Maximum value （16.74 g/L） of butyric acid concentration was obtained in fed-batch fermentation compared to 12.25 g/L in batch fermentation. It was concluded that cultivation under fed-batch fermentation mode could enhance butyric acid production significantly （P〈0.01） by C. butyricum ZJUCB. 相似文献
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