预处理方式对胡萝卜变温压差膨化干燥品质的影响

探讨麦芽糖浆浓度、冷冻处理和水分含量3种胡萝卜预处理方式对胡萝卜变温压差膨化产品品质的影响。结果表明:用40%麦芽糖浆液煮沸处理20 min,在-18℃下冷冻处理24 h,胡萝卜的水分含量控制为40%,在膨化工艺为膨化温度110℃,停止时间5 min,干燥温度80℃,干燥时间150 min的条件下制备的膨化产品品质色泽亮丽、口感酥脆。     

护色处理和膨化干燥工艺对苹果脆片品质的影响

探讨苹果变温压差膨化干燥条件对苹果脆片品质的影响。采用蒸馏法检测硫的残留量。以硫的残留量和色泽系数L、a、b值为指标,研究亚硫酸盐护色处理和膨化工艺对苹果脆片硫残留量和产品色泽的影响。结果表明,变温压差膨化干燥方法具有较高脱硫能力。使用0.02%亚硫酸酸钠护色处理的苹果,采用膨化工艺Ⅲ进行膨化干燥制备的苹果脆片中硫残留量符合国家标准GB 2760——2007,具有良好色泽和酥脆口感。     

粉碎和膨化工艺对大豆转基因成分及调控元件的影响

以转基因大豆为试验材料,运用定性PCR的方法研究了粉碎、膨化两种加工工艺对转基因大豆内源基因Lectin、外源基因Cp4 epsps以及启动子和终止子的影响。结果表明,粉碎和膨化加工工艺对大豆转基因成分及调控元件的降解有不同程度的影响。     

营养板栗晶加工技术

介绍膨化技术生产板栗晶的方法,工艺简单,所得产品香味浓,口感好,同时可根据不同人群调配营养成分。     

蕨根、葛根和马铃薯淀粉油炸膨化加工性质的比较研究

研究了在蕨根淀粉、葛根淀粉和马铃薯淀粉中添加食盐、碳酸氢钠、蔗糖、油脂后油炸加热效果、物料膨化效果的改变情况。结果表明:由于食盐、碳酸氢钠、蔗糖对淀粉糊化的影响及加热后的特性,随着添加量的增加膨化率变小,膨化过程也相对迟缓;随着糖含量的增加,产品的孔隙状态发生变化,孔隙变形、回缩,产品硬度减小,脆度增大,孔隙率渐大,色泽加深。油脂的添加,对脆度影响较大,但是对于膨化率、色泽的影响不大,添加过多时,口感变差。最佳配比是:食盐2%,碳酸氢钠0.2%～0.5%,蔗糖6%,油脂5%,并添加适量甜味剂以改善口感。     

预处理对红薯丁变温压差膨化干燥的影响

研究糖渍、冷冻、水分3种不同预处理方式对红薯丁变温压差膨化干燥产品含水率、色泽、膨化度、硬度和脆度的影响。结果表明,适当程度的糖渍预处理使物料加速失水,对物料色泽和外形的保持有显著的作用;低温预处理有利于膨化干燥产品膨化度、硬度和脆度的提高;适度的水分含量有利于产品膨化度和色泽品质的提高。     

Optimization of explosion puffing drying for high-value yellow-fleshed peach crisps using response surface methodology

Response surface methodology (RSM) was used to comprehensively evaluate the pilot scale nonfried explosion puffing drying (EPD) conditions for developing high-value yellow-fleshed peach crisps. The independent variables were different levels of vacuum drying temperature, vacuum drying time, and puffing pressure difference. The responses were crispness, total color difference (ΔE), total carotenoid content (TC), and DPPH radical scavenging capability (AEAC). Statistical analysis revealed that vacuum drying temperature significantly affected all the responses, puffing pressure difference showed maximum influences on TC, AEAC, and crispness, while vacuum drying time showed influences on TC and AEAC. The optimum EPD conditions obtained by RSM were vacuum drying temperature, vacuum drying time, and puffing pressure difference of 73?°C, 144?min, and 0.05?MPa, respectively. At this optimal condition, crispness, ΔE, TC, and AEAC value were found to be 7.3?N, 18.3, 53.5?µg/mg d.w., and 865.4?mg AA/100g, respectively. The EPD-dried yellow-fleshed peach crisps contained higher amounts of carotenoids and AEAC values when compared to hot-air dried samples, they were also found to be crispier than vacuum freeze-dried samples.     

非标链条炉排锅炉的技术改造

分析了锅炉过热器结焦、烟囱冒黑烟产生的原因,并阐述了解决的办法。为链条炉排锅炉的技术改造提供了借鉴。     

大装置四孔中空纤维生产工艺初探

从理论上阐述了四孔中空涤纶短纤维的成形机理 ,比较了在 1 2万吨大装置上与 4千吨小装置上生产四孔中空纤维生产工艺的差异 ;通过使用正交试验方法 ,进一步确定影响其卷曲和膨松性能的关键因素     

Influence of number of puffing times on physicochemical,color, texture,and microstructure of explosion puffing dried apple chips

The impact of number of puffing times during explosion puffing drying (EPD) on drying characteristics and qualities of apple chips was studied. Physicochemical characteristics, antioxidant capacity, color, texture, expansion ratio, rehydration ratio, hydroscopicity, and microstructure of apple chips dried by EPD with 0 (vacuum drying, VD), 1, 3, 5, 7, and 9 puffing times were analyzed. The apple chips dried by EPD with 3 and 5 puffing times exhibited better color (ΔE 7.27–7.70) and texture (hardness 40.5–40.8 N, crispness 8.8–9.3 N/mm), as well as higher expansion ratio (104.4–109.7%) compared to VD and EPD with fewer or more puffing times. The samples dried with 3 and 5 puffing times also showed relatively higher rehydration ratio and hygroscopicity, and acceptable retention of total phenolic content (0.32–0.37 mg/g) and ascorbic acid content (1.66–1.89 mg/100 g), as well as considerable antioxidant abilities (DPPH 79.45–81.17 AEAC µM/g, FRAP 66.54–68.25 TEAC µM/g, ABTS 73.36–79.21 TEAC µM/g) compared to VD dried samples. In conclusion, experiments with apple chips indicated that EPD drying with 3 to 5 puffing times yielded superior overall quality than that with more or fewer puffing times.