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光镊拉曼光谱分析酿酒活性干酵母的活化与生长
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国家自然科学基金(No. 30760010); 广西科学基金(No. 0832022Z, 0542034)


Raman Spectroscopic Investigation on the Activation and Growth of Active Dry Wine Yeast
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    摘要:

    应用光镊拉曼光谱新技术(LTRS)对酿酒活性干酵母复水活化与生长进行动态观察, 探索从分子光谱角度窥视胞内糖类、核酸、蛋白等生物大分子的变化过程, 及葡萄糖消耗和乙醇生成的动态过程。结果显示, 酿酒活性干酵母复水活化后, 第6小时和9小时, 即酵母对数生长中期及乙醇产生前期, 是调控酵母细胞生理变化的2个重要的时间点。核酸类物质在细胞活化后迅速增加, RNA在第6小时达到最大值; 而蛋白质和脂类物质从第6小时开始快速增加, 在第9小时达 到最大值, 而后呈下降趋势; 胞内乙醇则是在9 h开始出现, 在9

    Abstract:

    The growth and fermentation of Saccharomyces cerevisiae are both complexed physiology process. Here, we used laser tweezers Raman spectroscopy (LTRS) as tool and reported physiological metabolism such as nucleic acid, proteins, lipid, ethanol and glucose in active dry wine yeast cells. Our results indicated significantly changes of intracellular components at 6 h during log growth phase and 9 h that point between aerobic respiration to anaerobic fermentation. RNA synthesis was rapidly trigged in cultivated media and reached the maximum at 6 h. However, mitochondria respiration and syntheses of protein and lipid were slower than metabolism of nucleic acid in initial 3 h and then reached the maximum at crucial 9 h. The ethanol was also yielded at this time accompanying increase of glucose metabolism and reached the maximum of 0.98%. However, later, the metabolism of macromolecular, expected mitochondria respirations, were deeply declining after 9 h. All results show that LTRS can be utilized to monitor the metabolism of yeast growth and fermentation in quantitative or semi-quantitative analyses. In addition, improved kinetic model of ethanol fermentation processes also can be benefited from these metabolism parameters.

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彭立新,王桂文,廖 威,黄庶识,姚辉璐,黎永青. 光镊拉曼光谱分析酿酒活性干酵母的活化与生长[J]. 微生物学通报, 2009, 36(8): 1137-1142

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