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发酵法生产番茄红素的工艺研究
Studies on Lycopene Production by Blakeslea Trispora
【作者】 王航;
【导师】 袁其朋;
【作者基本信息】 北京化工大学 , 生物化工, 2006, 硕士
【摘要】 本文主要研究了三孢布拉氏霉菌发酵生产番茄红素的工艺。 针对菌体老化而导致发酵终期番茄红素产量降低的问题,首次采用了孢子悬液直接接种的方式,并对菌种孢子的生长条件进行了优化,发现菌体在28℃下生长3d,然后在18℃继续生长2d,此时表面的孢子生长状况最好,数量最多;并且充足的氧气和良好的光照条件对生长有利。另外,提出了正负菌的孢子悬液按比例混合后直接进行发酵培养的一级培养工艺,该工艺稳定、简便,不仅提高了番茄红素的产量,而且缩短了发酵培养时间,并确定了该工艺的发酵周期为5d,阻断剂的最优添加时间为第60h。 在三孢酸及其结构类似物对番茄红素发酵影响的研究中,分别讨论了各种促进因子的最优添加量。其中,每100mL培养基中,三孢酸的最优添加量为2μg,可使其产量提高44.22%,对番茄红素的刺激作用最显著;相同条件下,脱落酸、α-紫罗酮、Vitamin A和β-紫罗酮的最优添加量依次为0.1mmol、30mg、0.1mmol和0.5mmol。另外,比较了Tris-H2SO4溶液(pH=7.5)和95%的乙醇溶液对发酵的影响,最终选定Tris-H2SO4溶液作为三孢酸的溶剂。 本文采用高速逆流色谱和半制备高效液相色谱两种方法,对三孢布拉式霉菌干菌体中的有效组分进行了分离分析。前者得到了一种未知物,纯
【Abstract】 The fermentative production of lycopene by Blakeslea trispora is studied in this thesis.Due to the decline of the viability of B. trispora, a convenient inoculation method is firstly established, and the growth condition of B. trispora spores is optimized. As a result, when B. trispora is maintained on slants of potato extract for 3 days at 28℃, and then for 2 days at 18℃, the spores of B. trispora can be grown very well. At the meantime, the spores can be grown even better on the condition of light and oxygen. In addition, by adopting the direct and stable convenient fermentation progress, the yield of lycopene increased, on the other hand, the period of fermentation shortened. The period is 5 days, and the optimal time of the blocking agent addition is 60th hour.The influence of Trisporic Acid (TA) and its analogs on lycopene fermentation is studied, and the optimal addition quantities of these chemical regulators are determined. The effect of TA is the most prominent, its optimal addition quantity is 2 μg/(100mL medium). The yield of lycopene increases
【Key words】 lycopene; inoculation method; fermentation; trisporic acid; HSCCC; RP-HPLC;
- 【网络出版投稿人】 北京化工大学 【网络出版年期】2006年 11期
- 【分类号】TQ929
- 【被引频次】6
- 【下载频次】575