红甜菜萃取液蒸发浓缩过程研究(Ⅱ)红甜菜萃取液蒸发浓缩过程质量评估

提出了食品液体蒸发浓缩过程质量评估概念,对红甜菜萃取液的蒸发浓缩过程提出了以溶液吸光度随时间的变化率,M=dA／dt为蒸发浓缩过程的质量评估准则,并在质量评估准则指导下优化蒸发浓缩过程,得出了红甜菜萃取液蒸发浓缩时抗坏血酸的最佳添加量。     

红甜菜萃取液蒸发浓缩过程研究（Ⅱ）：红甜菜萃取液蒸发浓缩过程质量

提出了食品液体蒸发浓缩过程质量评估概念,对红甜菜萃取液的蒸发浓缩过程提出了以淀粉 吸光度随时间的变化率,Ｍ＝ｄＡ／ｄｔ为蒸发浓缩过程的质量评估准则,并在质量评估准则指导下优化蒸发浓缩过程,得出了红甜菜萃取液蒸发浓缩时抗坏血酸的最佳添加量。     

异形竖板降膜蒸发器的蒸发浓缩特性

以绿茶汁为物料 ,建立了反映蒸发浓缩性能与品质保持性能的蒸发浓缩过程质量评估准则IQ ,并以此准则为依据 ,以管式降膜蒸发器性能对比的方法 ,研究了热力浓缩新设备异形竖板降膜蒸发器的综合性能。结果表明 ,与管式蒸发器相比 ,异形竖板降膜蒸发器更适宜于液体食品的蒸发。     

耐温淀粉酶溶液蒸发浓缩过程中的质量评估

研究了异形竖板降膜蒸发器浓缩耐温淀粉酶过程中的酶失活动力学 ,并在浓缩过程中酶失活动力学的基础上 ,提出了蒸发浓缩耐温淀粉酶时的质量评估准则     

异形竖板膜蒸发器的蒸发浓缩特性

以绿茶汁为物料,建立了反映蒸发浓缩性能与品质保持性能的函数 浓缩过程质量评估准则ＩＱ,并以此准则为依据,以管式降膜蒸发器性能对比的方法,研究了热力浓它新设备异形竖板膜蒸发器的综合性能。     

茶汁蒸发浓缩和膜分离浓缩工艺对品质影响的比较研究

对茶汁蒸发浓缩和膜分离浓缩工艺对品质影响进行了比较。对两种工艺制取的茶汁成分进行了分析。取得的数据可用于指导茶饮料的生产。     

红甜菜萃取液蒸发浓缩过程研究(Ⅰ)红甜菜萃取液蒸发浓缩动力学

对红甜菜萃取液的蒸发浓缩动力学作了研究,表明甜菜红色素损失速率为表观二级反应,温度的影响遵循Arrhenius 方程,建立了甜菜红色素降解速率与料液温度、料液相对密度、抗坏血酸浓度相关联的蒸发浓缩动力学模型。新型异形竖板降膜蒸发器中蒸发浓缩过程中甜菜红色素吸光度实测值与动力学理论模型的吸光度预测值吻合良好,表明动力学模型对预测工业蒸发器浓缩过程中甜菜红色素损失程度具有良好的准确性,可用于指导工业生产。     

红甜菜萃取液蒸发浓缩过程研究(I)红甜菜萃取液蒸发浓缩动力学

对红甜菜萃取液的蒸发浓缩动力学作了研究。表明甜菜红色素损失速率为表观二级反应,温度的影响遵循Arrhenius方程,建立了甜菜红色素降解速率与料液温度、料液相对密度、抗坏血酸浓度相关联的蒸发浓缩动力学模型。新型异形竖板降膜蒸发器中蒸发浓缩过程中甜菜红色素吸光度实测值与动力学理论模型的吸光度预测值吻合良好,表明动力学模型对预测工业蒸发器浓缩过程中甜菜红色素损失程度具有良好的准确性;可用于指导工业生产。     

胡萝卜汁蒸发浓缩过程动力学

研究了胡萝卜汁在蒸发浓缩过程中胡萝卜素的损失动力学,建立了胡萝卜汁蒸发浓缩过程中胡萝卜素损失与料液固形物含量、料液温度之间的动力学模型。     

并流多效蒸发淡碱浓缩的矩阵算法

研究了求解有额外蒸汽引出的并流多效蒸发淡碱浓缩工艺数学模型的一种新算法———矩阵法 ,利用可视化语言VisualBasic 6 0编制了淡碱多效蒸发浓缩的计算程序。新算法优于目前已有的各种多效蒸发工艺计算方法 ,具有对初值要求不高、收敛稳定性好、收敛速度快等优点。算例表明 ,引出额外蒸汽预热淡碱节能效果显著。     

混料设计优化复合果蔬酒原料配比及其模糊数学评价

为酿造优质复合果蔬酒,本实验以苹果、猕猴桃、番茄、胡萝卜为原料,采用混料设计(Mixture)研究这四种原料的不同配比对复合果蔬酒品质的影响。以感官评价和酒精度为响应值,建立回归模型,分析研究各原料成分之间的相互作用及成分对响应值的影响。根据混料设计得到的最优原料配比为:猕猴桃汁10.0%,胡萝卜汁10.0%,番茄汁10.0%,苹果汁70.0%时,复合果蔬酒酒精度为5.0%vol,感官评价得分为85.0,所得到的产品色香味俱佳,并具有果蔬酒独特的风格。用模糊数学综合评价产品,结果表明该产品属于消费者能接受的。这对开发低度复合果蔬酒,丰富果酒类型和果酒市场有一定的现实意义,也可为实际生产过程提供理论指导。     

胡萝卜蜂蜜营养保健果冻的研制

以胡萝卜汁为主要原料,卡拉胶,CMC-Na和琼脂为主要的胶凝剂,并配以蜂蜜和柠檬酸等其他辅料,通过单因素试验、正交试验和感官评定方法,对胡萝卜蜂蜜营养保健果冻工艺进行研究,为保健果冻的开发提供参考依据。研究结果表明：胡萝卜汁汁添加量为30%,蜂蜜添加量为12%,柠檬酸添加量为0.28%,卡拉胶0.7%,CMC-Na 0.6%,琼脂添加量为0.28%时的工艺参数,其产品具有胡萝卜和蜂蜜风味、口感滑爽、色泽均匀、酸甜适度,有一定的保健功能,具有开发前途。     

Optimising enzymatic maceration in pretreatment of carrot juice concentrate by response surface methodology

In this paper, enzyme preparation for carrot pulp maceration was screened out and enzymatic maceration processing condition of the carrot pulp was optimised by response surface methodology for carrot juice concentrate. Pectinex Smash XXL was the best commercial enzyme preparation than Pectinex Ultra SP‐L, Pectinase FNP‐1 and cellulose FNC‐1 employed in the carrot juice processing in the study. The effect of enzyme concentration and incubation time and their complex interaction on juice β‐carotene content, juice yield and viscosity in the maceration process was studied by using experiments of central composite rotatable design. The results indicated that under the optimal conditions that the enzyme concentration was 100 mL t^?1 and incubation time was 80 min, the juice β‐carotene content was ≥54.2 mg kg^?1, the juice yield ≥63.5% and the juice viscosity ≤2.1 mPa S.     

Optimization of enzymatic process parameters for increased juice yield from carrot (Daucus carota L.) using response surface methodology

The effects of enzyme concentration (50–650 mg/kg grated carrot), pectolytic and cellulolytic enzyme ratio (3:7–7:3), incubation time (30–150 min) and temperature (25–65 °C) on juice recovery and viscosity from grated carrot were studied. A central composite rotatable design (CCRD) was used in designing the treatment combinations of four variables at five levels. The process involved in treating the blanched grated carrot with mixture of crude pectolytic enzyme from Aspergillus foetidus and crude cellulolytic enzyme from Trichoderma ressi, keeping the samples at the desired time, followed by extraction of juice. Enzyme-treated grated carrot sample showed increased juice recovery as compared to control. A second-order response surface model adequately fitted the data. All the variables affected juice recovery and viscosity significantly. Enzyme concentration, pectolytic and cellulolytic enzyme ratio, incubation time and temperature had total and combined effect at linear, square and interactive level on both responses. The optimum condition was enzyme concentration, 210.7 mg/kg of grated carrot; pectolytic and cellulolytic enzyme ratio, 3.84:6.16; incubation time, 130 min and incubation temperature 47 °C. Under the optimal conditions, juice extracted from enzyme-treated grated carrot was 74.3% having juice viscosity 1.07 cP, corresponding to the increase in yield by 13.95% and decrease in viscosity by 0.45 cP.     

胡萝卜、火龙果复合酸奶的工艺研究

以胡萝卜、火龙果、鲜奶等为原料,经预处理、打浆、再调配辅料,经均质、杀菌、发酵等工艺,得到一种色泽可人、风味独特的具有市场开发价值的营养保健型酸奶。试验以感官评价等为考察指标,通过单因素试验验和正交试验优化,确定了凝固型胡萝卜、火龙果酸奶的制备工艺。试验表明,最佳工艺条件为胡萝卜为25％,火龙果为4％,蔗糖含量为8％,接种量为6％,CMC与明胶（1：1）的复合稳定剂添加量为0．2％,42℃发酵4h。     

Effects of thermosonication and orange by‐products extracts on quality attributes of carrot (Daucus carota) juice during storage

Effect of thermosonication on carrot juice containing peel (CJPL) and pulp (CJPP) extracts from orange at different concentration (0.5, 2.0 and 4.0 mg GAE per g extracts) of total phenolic contents (TPC) was evaluated for quality attributes. Thermosonication of juice was done at 52 °C, 6 min for CJPL and 60 °C, 5 min for CJPP (values based on our preliminary optimisation results of ultrasound process conditions of the juice) at 40 kHz and 110W. Effect of thermosonication and addition of peel and pulp extracts at highest concentration increased the TPC and antioxidant activity of the juice (P < 0.05). Highest inactivation of microorganisms and better sensory attributes was achieved in thermosonicated CJPP for 21 days. Titratable acidity, pH, browning index and viscosity were improved by thermosonication and at highest extract concentration. °Brix and total carotenoid were not significantly affected by treatments. Therefore, thermosonication at 60 °C and 4.0 mg GAE per g extract concentration of peel and pulp may be used in formulation of functional carrot juice with improved health properties.     

胡萝卜汁添加对乳化肠食用品质的影响

研究了胡萝卜汁添加对乳化肠色泽、质构特性、保水性以及感官品质的影响。基于最优基础配方,实验通过控制胡萝卜汁的添加量(0%、5%、10%、15%),探索其对于乳化肠食用品质的影响。结果表明:添加胡萝卜汁组与对照组(胡萝卜汁添加量0%)的色差、质构以及感官方面存在显著差异(P0.05)。随着胡萝卜汁添加量的增加,红度值、硬度都呈显著下降趋势,而蒸煮损失、黏聚性和弹性与对照组没有显著差异。胡萝卜汁添加量为10%的样品组的硬度、咀嚼性和胶着性最好,且通过感官评定得知该组各项指标综合评定结果最好,本实验得出10%是胡萝卜汁较优的添加量。