共查询到19条相似文献,搜索用时 62 毫秒
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《食品工业科技》2008,(06):223-225
葡萄皮具有极高的营养价值,为充分利用葡萄皮中的功能性成分,对葡萄皮的清洗、干燥、杀菌、低温超微粉碎等工艺进行了研究。采用正交设计方法,选取时间、温度、水分含量为影响因素,以表征粉体特性的休止角为考察指标(滑角和细胞破壁率作为参考)。结果最佳粉碎工艺为C1A3B1,即:将葡萄皮调整水分含量小于3%,加入30g/kg微晶纤维素,在-20~-15℃下粉碎30min。最终得出原料水分对粉体特性影响最大,粉碎时间影响较大,在粉碎过程中应加以控制。采用该工艺获得的葡萄皮超微粉的颗粒直径为2.1~25.6μm,平均直径为7.8μm,而葡萄皮细胞的直径为7.5~52.5μm,平均为25.7μm,说明细胞破壁率达到了100%,并且反应粉体流动性的指标休止角α=39.6°(<40°),达到了超微粉体生产的要求。 相似文献
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以葡萄皮渣为原料,经过低浓度NaOH预处理后,采用纤维素酶降解,从中得到水溶性膳食纤维含量较高的高活性膳食纤维。结果表明,NaOH最佳预处理浓度为0.5%;纤维素酶最佳作用条件为:酶用量50μL/g,作用温度50℃,pH7.0,时间6h,提取物中的总膳食纤维含量达到60.7%,其中水溶性膳食纤维占28.8%,是原料的2倍多,说明酶解法提取葡萄皮渣膳食纤维是可行的。 相似文献
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采用研磨式粉碎法对覆盆子干果进行超微粉碎,以索氏提取和恒温搅拌溶出的方法对不同的粉体粒度与覆盆子总黄酮溶出特点进行了研究.结果表明:经超微粉碎后,随着覆盆子粉体粒度的减小,其总黄酮溶出量呈明显增加的趋势,粉体为60、100、140、200目,其总黄酮溶出量分别是21.06、25.49、26.37、26.70、27.09 mg/g;在溶出速率方面,粉体为200目其粒度较细时,其前50min溶出速率比较大,50 min后其溶出速率逐渐减小并趋于稳定,说明这时覆盆子粉的溶出已基本完全,溶出时间对溶出量已影响不大;粉体粒度较粗时,在前50 min其溶出速率较小,50 min后其溶出速率有所减小,但减小的幅度要小于200目粉体,说明超微粉碎可以提高覆盆子的溶出速率和改善溶出效果,大大提高覆盆子的利用率. 相似文献
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豆渣酸水解工艺条件的研究 总被引:1,自引:0,他引:1
采用酸水解法水解豆渣,研究水解温度、水解时间、HCl溶液添加量与原料比值(mL/g)3个因素对豆渣水解率的影响,并确立了豆渣酸水解的最佳工艺条件.结果表明,水解温度90℃,水解时间5 h,HCl溶液添加量与原料比值(mL/g)2.75:1为最佳水解条件,在此条件下豆渣的水解率为58.02%. 相似文献
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为了明确超微粉碎工艺对菠萝蜜粉品质的影响,本文以真空冷冻-变温压差膨化联合干燥的菠萝蜜粗粉为原料,研究了超微粉碎时间对菠萝蜜超微全粉的各项理化和营养品质的影响。实验结果表明,超微粉碎时间对菠萝蜜的粒径的影响较小,经5min粉碎后即可达到超微粉的要求;菠萝蜜粉的溶解性指数和持水力与超微粉碎时间呈上升趋势,类胡萝卜素和维生素C含量与超微粉碎时间呈下降趋势;通过真空冷冻-变温压差膨化联合干燥方法干燥法获得的菠萝蜜粉的流动性可满足实际生产的需要,产品的吸湿性较小,不易粘结。 相似文献
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【目的】检测酿酒葡萄籽冷榨饼粕超微粉的主要营养成分的含量。【方法】以未榨油的红色酿酒葡萄品种8804葡萄籽超微粉为对照,对其冷榨饼粕超微粉的主要营养成分进行检测和对比分析。主要检测指标为蛋白质、粗纤维、粗脂肪、氨基酸、VE和VA 、总多酚和原花青素。【结果】与对照组相比,葡萄籽冷榨饼粕超微粉仍然含有丰富的营养物质:其蛋白质、粗纤维及氨基酸的含量分别为11.11%、37.1%和5.52%,均高于在未榨油葡萄籽超微粉中的10.16%、31.4%和5.01%;粗脂肪和VE的含量分别为11.03%、12.19mg/kg,略低于对照组中的17.16%、14.10mg/kg;总多酚含量丰富,为8.29%;原花青素含量为2.58%。【结论】葡萄籽冷榨饼粕超微粉营养物质丰富,具备很高的利用价值。 相似文献
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Pin Gong Zihan Huang Yuxi Guo Xiaojuan Wang Shan Yue Wenjuan Yang Fuxin Chen Xiangna Chang Lei Chen 《Journal of food science》2022,87(8):3528-3541
The effects of superfine grinding on apparent structure, physicochemical properties, and functional characteristics of three kinds of mushroom (Lentinus edodes, Hericium erinaceus, and Cordyceps militaris) powders were investigated. Coarse and 100-mesh powders of the mushrooms were prepared by common grinding, while a superfine powder was obtained by superfine grinding. By comparing the mushrooms before and after grinding, it was found that the mushroom fines did not produce new chemical groups but increased crystallinity. The results of the physicochemical properties revealed that the fines became less fluid after grinding. The protein content and solubility increased as the particle size decreased. The water and oil holding capacity, glucose binding capacity, cation exchange capacity, and antioxidant activity of the mushroom fines increased after grinding. This study provides a theoretical basis for the development process of edible mushroom food, as well as new ideas for the development of edible mushrooms. 相似文献
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Kangliang Sheng Hao Qu Changhong Liu Ling Yan Ju You Shanshan Shui Lei Zheng 《International Journal of Food Science & Technology》2017,52(9):2106-2114
In this study, we evaluate the effects of high hydrostatic pressure (HHP) and superfine grinding (SFG) treatment on grape pomace. The results showed that the HHP treatment improved physicochemical and antioxidant properties of grape pomace than the SFG treatment did. Moreover, the results of SEM indicated that the HHP‐treated grape pomace turned to have more lamellar structure, resulting in more hydrophilic groups exposed to improve WRC, WSC and SDF content. The results of FT‐IR spectra indicated that the main components and chemical structure of grape pomace after processing did not significantly change. Therefore, the HHP treatment had better effect in improving the functionality of grape pomace than that of the SFG treatment. The grape pomace treated by the appropriate processing methods could be used as functional foods. 相似文献
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Production of silver carp bone powder using superfine grinding technology: Suitable production parameters and its properties 总被引:5,自引:0,他引:5
Gang-cheng WuMin Zhang Ying-qiang WangKebitsamang Joseph Mothibe Wei-xing Chen 《Journal of food engineering》2012,109(4):730-735
Superfine grinding technology is a new type of food processing that is employed to produce powders with outstanding properties such as high solubility, dispersion, adsorption, chemical reactivity and fluidity. The objective of this work was to study the superfine grinding technology on the silver carp bone and to optimize the operational parameters. The optimum processing conditions of superfine grinding were: feeding pressure of 0.85 MPa, grinding pressure of 1.0 MPa, feeding rate of 0.0325 g/s, feeding particle size of 150-300 μm and one pass through the grinder. Silver carp bone powder with average particle size (D50) of 7.65 μm was produced at these conditions. It was found that the smaller particle size of the powder, the higher its fluidity, solubility, solubility of protein, electric conductivity and water holding capacity of the powder were. So the quality of the products produced by the superfine grinding technology was said to be improved. 相似文献