When the [ Ca2+] was 30 μ M/ mg Pr, the lipid free radicals increased about 32% compared with the control. 钙过负荷时,钙离子使线粒体产生的脂类自由基增加,当钙浓度为30μmol/L·mgPr时,产生的脂类自由基约增加32%。
If 0.02 mg/ kg iron ion was put in beer, obvious aging smell would be found. 实验证明,即使向啤酒中添加很微量的铁离子如0.02mg/L,,啤酒也将产生明显的老化味。