共查询到20条相似文献,搜索用时 77 毫秒
1.
2.
果胶酶可以促进果胶水解,提高水果的出汁率。运用响应面法和灰色关联分析优化果胶酶影响人参果出汁率的工艺参数,建立相应的回归模型Y= 89.78333 + 0.86250x3 + 0.67917x4 + 0.80937x32 - 0.83125x1x2。方差分析结果表明,酶解时间、果胶酶用量对人参果出汁率影响显著(P < 0.05),而酶解温度、初始pH 值对出汁率无显著影响(P > 0.05)。多元回归分析结果显示,初始pH 值、酶解温度、酶解时间及果胶酶用量与出汁率之间回归模型拟合程度较好,可用于实际生产预测。 相似文献
3.
以果胶酶为澄清剂,研究果胶酶用量、pH、温度和时间对玫瑰香橙汁澄清度的影响。通过单因素试验,并利用Box-Benhnken中心组合设计,进行澄清条件优化。结果表明,果汁透光率测定最佳波长为685 nm,澄清最佳工艺参数为果胶酶用量0.09 g/L,酶解温度31 ℃,果汁pH值为3.9,酶解时间120 min。在此最佳条件下,玫瑰香橙汁的透光率为98.00%。 相似文献
4.
探讨果胶酶澄清红树莓果酒的最佳工艺条件。红树莓榨汁后经发酵获得红树莓果酒,然后添加不同量的果胶酶,通过单因素试验研究果胶酶不同添加量、不同酶解温度、不同酶解时间和不同酶解处理pH对红树莓果酒澄清的影响,通过正交试验确定果胶酶澄清红树莓果酒的最佳工艺条件,并探讨果胶酶澄清避免红树莓果酒后浑浊发生的可能性。应用果胶酶澄清红树莓果酒的最佳工艺条件为:果胶酶添加量0.4 mL/L、酶解温度为35℃、pH为3.0、时间为150 min。澄清后获得的红树莓果酒呈亮红色、透明清澈,具有红树莓自然色泽、口味纯正、营养丰富的特点。利用果胶酶澄清红树莓果酒能较好地避免红树莓果酒后浑浊的发生,因而果胶酶用于澄清红树莓果酒具有应用前景。 相似文献
5.
6.
7.
甜菜制糖中渗出汁中的果胶含量对生产有较大的影响.采用果胶酶对甜菜渗出汁进行清净效果研究,考察果胶酶的用量、酶解pH、酶解温度、酶解时间对渗出汁的过滤速度和果胶去除率的影响.单因素实验结果表明:果胶酶用量为5 - 15mg/kg,温度为50 - 60℃,pH值为4.0 -5.5,酶解时间10-15min条件下,果胶酶对渗出汁澄清处理的效果较好.在单因素的基础上,采用正交实验优化工艺,得到最佳的工艺条件为:果胶酶用量为15mg/kg,酶解pH 5.0,酶解温度50C,酶解时间15 min.此时果胶去除率为44.38%. 相似文献
8.
9.
10.
11.
人参果自然发酵醪中酵母菌种筛选及其发酵性能 总被引:1,自引:0,他引:1
为筛选适合甘肃河西走廊特产人参果酒精发酵的优良酵母菌株,以人参果自然发酵醪为原料,通过镜检等方法从分离纯化的20株酵母菌中进一步筛选得到11株发酵性能良好的酵母菌,分别命名为TY8、TY5、TY6、Y3、Y4、Y5、LY3、LY1、Y1、Y2、TY2。以葡萄酒活性干酵母作为对照菌株,通过酵母发酵力比较、耐乙醇能力、耐SO2能力、理化指标分析及感官评价,筛选出1株适于人参果果酒发酵的酿酒酵母TY8。以此菌株发酵生产的人参果果酒香气特征明显,酒体澄清透明,具有人参果果酒典型风味。 相似文献
12.
原汁青梅果醋酿造技术研究 总被引:4,自引:0,他引:4
本实验分析了不同成熟度青梅的品质,研究了果胶酶处理对出汁率的影响,进行了耐高酸醋酸菌的驯化和原果醋的澄清处理实验,结果认为原汁青梅果醋的适宜加工原料成熟度为8成熟;采用200mg/kg果胶酶处理可使其出汁率提高12.0%,且大大降低取汁难度;利用CaCO3对青梅原酒进行降酸处理,采取低酸醋酸发酵逐步接种到高酸的方法可驯化醋酸菌,使其最终可直接发酵高酸的青梅原酒;青梅原醋经过100mg/L的果胶酶处理3h后,再用1.4g/L的皂土下胶,可使其透光率达到92%以上。 相似文献
13.
14.
Pepino果实的化学成分及保健功能评价 总被引:3,自引:0,他引:3
对Pepino(SolanummuricatumAit)果实的主要化学成分进行测试,并用Pepino果汁进行了动物抑瘤实验和补钙实验。结果表明,Pepino除含有一般水果的营养物质外,还富含Vc和Ca,其果汁没有显著地抑癌作用但可明显地补钙。 相似文献
15.
16.
Mango is a popular and highly produced fruit in India. Wine from two mango cultivars Banginapalli and Totapuri was prepared and the mode of higher alcohols synthesis during wine fermentation was evaluated. Mangoes were peeled off and juice was extracted immediately after crushing (control) and also after 10 h of pectinase treatment. The recovered juice was allowed to ferment at 15 and 20C. During fermentation, higher alcohols and sugars were measured. Contents of all the higher alcohols analyzed increased during fermentation. More volatiles were observed in wine produced from Totapuri cultivar (358 ± 12.7 mg/L) than wine from Banginapalli cultivar (340 ± 10.5 mg/L). Pectinase treatment increased the synthesis of iso-amylalcohol, 2-phenyl ethanol, n-propanol, n-butanol and methanol during fermentation. Sensory evaluation scores of wine correlated to the sum of higher alcohols. The results of the present study suggest that the pectinase treatment increases the mango juice yield and results in better wine sensory quality.
Nowadays, the number of wine consumers is increasing rapidly all over the world. In order to meet the demand, researchers are developing alternative wine producing technologies. In the present study, we made an attempt to produce wine from mango, the king fruit of world. The main objectives of this study are to increase the quality and quantity of mango juice for wine production and evaluate the aroma compounds kinetic parameters during wine fermentation. This study also provides an adequate process for both juice and wine production from mango and other tropical fruits. The findings regarding pectinase treatment, formation of major volatile compounds and sensory evaluation can be valuable references to the wine industry. 相似文献
PRACTICAL APPLICATIONS
Nowadays, the number of wine consumers is increasing rapidly all over the world. In order to meet the demand, researchers are developing alternative wine producing technologies. In the present study, we made an attempt to produce wine from mango, the king fruit of world. The main objectives of this study are to increase the quality and quantity of mango juice for wine production and evaluate the aroma compounds kinetic parameters during wine fermentation. This study also provides an adequate process for both juice and wine production from mango and other tropical fruits. The findings regarding pectinase treatment, formation of major volatile compounds and sensory evaluation can be valuable references to the wine industry. 相似文献
17.
18.
以沙糖桔、巨峰葡萄为原料,研究其混合发酵工艺对复合果酒的苦味以及澄清度的影响,采用单因素及正交试验对复合果酒的酿造工艺进行优化。结果表明,复合果酒最佳砂糖桔汁和葡萄汁添加量分别为40%和60%;最佳发酵工艺参数为酵母接种量为0.1 g/kg,初始糖度为24 °Bx,发酵温度24 ℃,主发酵时间为8 d。在此最佳发酵工艺条件下,复合果酒感官评分为82.8分,酒精度为11.88%vol。最佳脱苦工艺为柚苷酶添加量0.03%,酶解温度50 ℃,酶解时间为90 min。在此最佳脱苦工艺条件下,复合果酒感官评分为7.5分。加入0.06%的果胶酶和0.02%聚乙烯聚吡咯烷酮(PVPP)时,透光率为90.6%。沙糖桔葡萄复合果酒酒体清澈透亮、色泽诱人,口感柔和、爽口,香气浓郁。 相似文献
19.
沙棘原汁澄清处理对沙棘酒香气成分的影响 总被引:1,自引:0,他引:1
为研究沙棘原汁澄清处理对沙棘酒发酵速度和香气成分形成的影响,利用果胶酶对沙棘原汁进行澄清处理。分别对沙棘澄清汁和未处理的沙棘原汁调整到糖度23%、pH3.7,然后接入0.18%的活性干酵母于28.5℃下发酵,陈酿后采用气-质联用仪(GC-MS)对各发酵酒进行香气成分检测。结果表明:以澄清汁为原料发酵的沙棘酒中检测出58种香气化合物;原汁发酵的沙棘酒中检测出52种香气成分,其中有28种非两者共有,产生了非常明显的香气差异。主要香气成分为3-甲基-1-丁醇和辛酸乙酯,用澄清汁发酵的沙棘酒其相对含量分别为31.24%和10.40%,较原汁发酵的沙棘酒分别提高了16.45%和5.32%。因此表明对沙棘汁澄清处理更有利于沙棘酒香气的形成。 相似文献