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天然保鲜剂对冷却牦牛肉的保鲜效果研究 总被引:1,自引:0,他引:1
[目的]为了解决牦牛肉的保鲜问题.[方法]本研究采用天然保鲜材料魔芋、生姜、洋葱、月桂叶,经榨汁、浸提、分离等处理,配成一定比例的天然保鲜剂,对冷却牦牛肉进行涂膜处理,采用L9(34)正交试验,选出最优保鲜剂组合,即生姜15%、魔芋0.7%、月桂叶0.5%、洋葱15%.冷却牦牛肉经涂膜保鲜后,在0~3℃条件下贮藏、保鲜期可达17 d,贮藏期间,冷却牛肉经TVBN(挥发性盐基总氮)测定,pH值、感观表现均符合国标标准.[结果]表明,四种保鲜材料均有一定的保鲜效果,[结论]说明天然保鲜剂保鲜方法具有安全、经济、方便等特点. 相似文献
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桑椹是食药同源的“第三代水果”,其外皮较薄不利于运输储藏,为了降低桑椹腐烂程度,延长货架期,必须采用保鲜技术来延长桑椹的贮藏时间。通过阐明桑椹在储藏期间各种生理指标和功能性物质含量变化,并将普通保鲜技术与壳聚糖复合涂膜保鲜技术进行了对比,表明壳聚糖复合涂膜保鲜技术在水果保鲜中的特点;通过综述壳聚糖复合涂膜技术在其它水果保鲜和桑椹保鲜方面的的研究进展,既体现了壳聚糖复合涂膜技术可以对桑椹起到较好的保鲜效果,也证实了该技术应用的广泛性和高效性。壳聚糖复合涂膜技术作为绿色、高效、无化学残留的复合保鲜技术将进一步提高桑椹采摘后的保鲜水平,对桑椹的后续加工和延长产业链具有重要意义。 相似文献
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化学保鲜技术虽然是目前葡萄等果蔬贮藏保鲜的主要方法 ,但是基于环境与健康因素的考虑 ,它在果蔬保鲜上的应用越来越受到质疑。在当今世界 ,随着绿色食品呼声增强 ,物理保鲜技术受到广泛的关注。魔芋涂膜保鲜作为物理保鲜法之一 ,因其独特的保鲜效果而备受青睐。1 魔芋涂膜贮藏保鲜法魔芋涂膜保鲜技术是近年来兴起的一项新技术。魔芋多糖是一种全天然的可食性物质 ,具有助消化、减肥、降低胆固醇和防癌等多种功效 ,享有“食品之花”、“魔力食品”之美称 ,目前正广泛应用于食品及医药化工行业。用魔芋多糖在葡萄上涂膜 ,能够在果实表面形… 相似文献
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Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures. 相似文献
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Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures. 相似文献
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在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。 相似文献
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近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2%的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。 相似文献
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