摘要：通过正交试验设计,探讨了丙酮提取法对芦笋皮中黄酮类物质提取量的影响,实验结果表明:试验中对芦笋皮中黄酮类化合物提取率的影响依料液比和提取温度、提取时间、提取溶剂浓度的不同提取2次而改变。其中料液比具有较大的影响,提取的温度和提取溶剂浓度具有同等的影响,而提取的时间影响不大。结果表明,料液比1:40,提取温度50℃,提取2h,提取溶液浓度60%,提取率最佳。

摘要：为筛选适宜连城县种植的加工专用型紫色甘薯新品种,采取随机区组设计,以‘龙岩7-3’为对照,2012年秋季引进5个紫色甘薯新品种进行品种比较试验,从农艺性状、经济性状、薯块的营养品质、甘薯干和油炸脆片产品的加工品质等方面进行筛选鉴定。结果表明:各品种表现不同。其中,‘伟祥1号’鲜薯产量最高达41.9 t/hm2,比对照‘龙岩7-3’增产25.8%。‘济薯18号’鲜薯产量为31.6 t/hm2,与‘龙岩7-3’相当。‘济薯18’和‘伟祥1号’加工的甘薯干,不仅在工艺稳定性、口感、色变等综合指标,均接近‘龙岩7-3’,而且在产品的形态、色泽、透明度、口感和质地等方面均表现优异,可作为加工甘薯干的紫薯品种。‘济薯18’和‘伟祥1号’加工的油炸薯片,含油率适中,膨化度高,产品品质与对照‘龙岩7-3’相当,可作为加工油炸薯片的紫薯品种。‘福薯9号’、‘泉紫薯1号’和‘宁紫薯1号’的薯形美观,营养品质高,食味粉香,适合优质鲜食和加工甘薯全粉用。

摘要：Objective] This study almed to screen high-quality and high-yield purpIe sweet potato varieties special y used for processing which were suitabIe for pIanting in Liancheng County. [Method] By using a randomized bIock design, with ‘Longyan 7-3’ as a controI, five purpIe sweet potato varieties were introduced in the autumn of 2012 for comparaton test to evaluate agronomic tralts, economic characters, nu-tritional quality, and processing quantity of dried sweet potato products and fried chips. [Result] ‘Weixiang No.1’ exhibited the highest yield of 41.9 t/hm2, which was improved by 25.8% compared with ‘Longyan 7-3’; fresh tuber yield of ‘Jishu No. 18’ reached 31.6 t/hm2, which was simiIar to that of ‘Longyan 7-3’; dried sweet potato products of ‘Jishu No.18’ and ‘Weixiang No.1’ not onIy had simiIar process stabiIity, taste and coIor to ‘Longyan 7-3’, but also exhibited exceI ent morphoIogy, coIor, transparency, taste and texture, which indicated that these two purpIe sweet potato varieties were suitabIe for processing dried sweet potato products; fried sweet potato chips of ‘Jishu No.18’ and ‘Weixiang No.1’ had moderate oiI content, high expansion degree and simiIar quality to ‘Longyan 7-3’, which indicated that these two purpIe sweet potato varieties were suitabIe for processing fried sweet potato chips; ‘Fushu No.9’, ‘Quanzi No.1’ and ‘Ninzi No.1’ exhibited beautifuI shape, high nutritional quality and good eating quality, which were suitabIe for fresh eating or processing sweet potato powder. [Conclusion] This study provided a scientific ba-sis for Iarge-scale popuIarization and appIication of new purpIe sweet potato vari-eties special y used for processing.

摘要：以新鲜连城地瓜为原料,研究地瓜真空冷冻干燥工艺技术,确定最佳工艺参数和加工工艺,为地瓜制品加工生产实践提供参考依据。通过单因素实验和正交实验设计,以冻干速率作为考察指标,研究了加热温度、物料厚度、压力(真空度)3个因素对真空冷冻干燥速率的影响。实验表明,对冻干地瓜干燥速率的影响主次顺序为加热温度、压力(真空度)、物料厚度,最佳工艺条件分别为:加热温度50℃、压力(真空度)60Pa、物料厚度5mm,在此干燥工艺条件下,地瓜冻干速率最高产品色泽等保持较好。