共查询到19条相似文献,搜索用时 441 毫秒
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超声波防除积垢节能技术 总被引:11,自引:0,他引:11
本文选择糖厂蒸发罐积垢为研究对象,研究了超声波防除传热设备积垢的作用。在弄清机理的基础上进行生产性试验,结果表明:超声波不仅具有减缓积垢形成速度又能破坏已有积垢的双重作用,能提高蒸发系统的传热系数0.6~0.8倍,停止使用化学清洗剂煮罐,处长设备使用寿命,减轻劳动强度,无化学污染,是一项新型高效的节能技术。 相似文献
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花青素作为紫薯的主要生物活性物质, 具有抗氧化、预防癌症、预防心血管疾病、保护肝脏、保护大脑、降血糖血脂和阻止脂肪积累以及消除炎症等生理功能, 对于改善记忆力和抑菌也有很好的功效。我国是紫薯的生产大国、资源丰富, 从紫薯中提取花青素降低了花青素的提取成本。超声是一种非热加工的提取技术, 具有节能、省时、高效等诸多优点, 在提取植物花青素的领域越来越受欢迎。本文综述了超声辅助提取紫薯花青素的几种方法及其最新研究进展, 包括超声辅助溶剂法、超声辅助酶法、超声-微波协同法、超声辅助冻结-融解法、超声辅助双水相法, 以期为超声辅助提取紫薯花青素领域的科研工作提供理论参考。 相似文献
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Ariel Cavazos Elvira Gonzalez de Mejia 《Comprehensive Reviews in Food Science and Food Safety》2013,12(4):364-380
Cereal grains, such as wheat, barley, rice, rye, oat, millet, sorghum, and corn, have been staples in human diets since ancient times. At present, there is a significant body of scientific evidence showing the health benefits of consuming whole grains in chronic disease prevention, particularly in regards to diabetes, cardiovascular disease, and cancer. The objective was to determine bioactive peptides in cereal grains that may prevent cardiovascular disease, cancer, inflammation, and diabetes. Bioactive peptides that may be obtained from cereal grains, particularly wheat, oat, barley, and rice, were identified. Bioactive peptides that play a role in chronic disease prevention have been found primarily in legumes and dairy products; although research connecting cereal grains with potential bioactive peptide activity is limited. In this review, 4 cereal grains, wheat, oat, barley, and rice, were evaluated for bioactive peptide potential using the BIOPEP database. In addition, research information was compiled for each grain regarding evidence about the effect of their proteins in prevention of chronic diseases. All 4 grains showed high occurrence frequencies of angiotensin‐converting enzyme‐inhibitor peptides (A = 0.239 to 0.511), as well as of dipeptidyl peptidase‐inhibitor and antithrombotic, antioxidant, hypotensive, and opioid activity. Wheat and rice proteins had anticancer sequences present. Wheat and barley showed the greatest diversity and abundance of potential biological activity among the cereal proteins. Further research needs to be conducted to learn how these biologically active peptide sequences are released from cereal grains. This study supports the notion that cereal grains are a nutritious part of a healthy diet by preventing chronic diseases. 相似文献
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本文通过对粗粮的筛选,选出最佳粗粮与浡海条斑紫菜进行复配,对其进行吸油量及脂肪酶等降血脂功能性指标的测定进行研究,首先响应面法优化条斑紫菜可溶性多糖的最佳超声波法提取工艺,再在9种粗粮中筛选出最适复配的粗粮种类,再以体外油脂吸附能力即吸油量为指标,筛选出条斑紫菜多糖和粗粮多糖的最佳复配比,最后使用复配物对小鼠脂肪酶进行抑制活性实验。结果表明:超声波法最佳提取条斑紫菜多糖的工艺为:料液比1:25,超声功率为150 W,超声温度60 ℃,超声时间30 min,获得水溶性多糖得率为4.24%±0.19%。筛选9种粗粮中得到薏仁米最适合与条斑紫菜多糖复配,且最佳复配比为1:1,吸油量最大为45.87%±5.27%,对小鼠脂肪酶抑制率为34.67%。本实验为研发新型渤海紫菜降血脂功能性食品提供理论依据。 相似文献
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分析了我厂两碱法原卤净化后,加热管内壁结碳酸钙垢的原因,探讨了我厂采取加盐酸、加阻垢剂、用超声波阻垢器的方法,以及对加热管内碳酸钙垢防治的情况和存在的问题. 相似文献
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AIQIAN YE HARJINDER SINGH MICHAEL TAYLOR SKELTE ANEMA 《International Journal of Dairy Technology》2005,58(3):143-149
The effects of heat treatment by direct steam injection (DSI) and concentration of whole milk using a pilot scale multiple-effect evaporator on fat globule size and the total milk fat globule membrane (MFGM) proteins were examined. In both nonpreheated and preheated whole milk, the size of milk fat globules decreased while the surface protein concentration of the fat globules increased as the milk passed through each effect of the evaporator. These results indicate that the fat globules were disrupted during DSI heating and evaporation and the proteins from the skim milk were adsorbed onto the fat globule surface. 相似文献
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