不同粉碎条件对葡萄籽超微粉破壁率的影响

以赤霞珠葡萄籽为原料,研究不同的冷冻温度和粉碎时间对葡萄籽超微粉细胞破壁率的影响。借鉴理想破碎模型单元破碎率计算法,测定葡萄籽的细胞直径以及葡萄籽超微粉的粒径,并统计粒径的分布概率研究破壁率。结果表明:同一冷冻温度下,除个别条件下存在例外,葡萄籽细胞破壁率随着粉碎时间的延长有明显的升高趋势,且在-15和-25℃时破壁率与粉碎时间具有线性关系;在同一粉碎时间下,随着温度的降低破壁率有升高的趋势但不呈线性,在粉碎时间延长至75min时破壁率已达到较高水平,温度对其影响微弱。超微粉粒径小于葡萄籽细胞平均直径时,破壁率为100%;超微粉粒径大于葡萄籽细胞平均直径时,破壁率随着粒径的增大而减小。推荐较好的葡萄籽超微粉破碎条件为:冷冻温度-15℃、粉碎时间75min。 

Effect on broken grape seed cell rate under different crush conditions

Seeds of Cabernet Sauvignon were crushed under the different conditions of temperature and time to find out the effect on broken grape seed cell rate. Using the method of calculation of ideal crush model for reference,broken grape seed cell rate was calculated by measuring the diagram of grape seed cell,particle size of grape seed superfine powder,and probability distribution of particle size. Our data demonstrate broken grape seed cell rate rised obviously during the extending of crush time at the same crush temperature,with a linear relation under-15℃ and-25℃. While the rate rised slowly with the decrease of crush temperature in the same crush time. When the crush time extended to 75 min,the broken cell rate was high and influence of temperature was low. The broken cell rate of the superfine powder whose particle size was smaller than the diagram of grape seed cell was 100%,while the broken cell rate of whose particle size was bigger than the diagram of grape seed cell diminished with the increase of particle size. The better crush condition recommended was-15℃ with 75 min.