共查询到16条相似文献,搜索用时 203 毫秒
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在简要介绍纳米技术、纳米食品基本概念的基础上,分析了纳米食品制备技术的可行性和应用领域,并就纳米固醇、纳米富硒食品两个应用案例进行讨论,为纳米食品的进一步开发提供了参考性技术路线。 相似文献
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食品在运输及贮存期间极易受到微生物等的污染从而导致食品变质,引发食品安全问题进而危害人们的身体健康。近年来,纳米技术在食品领域越发受到重视。纳米技术可以将物质分解成更小的微观粒子,使物质的结构可以更为精确地被人们所掌控和调配。在食品保鲜领域,具有抑菌效果的纳米颗粒相比较传统抑菌剂可以更有效地抑制微生物滋生,优化食品贮藏环境并且延长食品保质期。针对上述情况,研发出具有抑菌性的纳米颗粒食品保鲜技术已成为现阶段食品保鲜领域的重点研究方向之一。因此,本文综述了近年来具有抑菌性的纳米颗粒的制备方法,对比分析了每种制备方法的优缺点和应用领域,并归纳了纳米颗粒常用的结构表征方法,以期能够为选择合适的制备及分析方法提供参考。同时介绍了近年来不同类型纳米颗粒在我国食品保鲜领域的应用进展,并对抑菌性纳米颗粒的制备技术、安全性和规模化生产等问题提出了未来发展建议,为纳米技术在食品保鲜领域的发展提供参考依据。 相似文献
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Nanotechnology is the manipulation of matter on a small scale (1-billionth of a meter). Nanomaterials have been used extensively in food production and packaging to improve food safety and eating quality. However, consumer knowledge of nanotechnology is low and the public’s perceptions about its use in foods is poorly understood. This study assessed consumers’ knowledge and attitudes towards food nanotechnology, and measured degree of liking and purchase intent for tasted foods presented as having specific nanotechnology benefits. Participants were 161 young, mostly college-educated adults. They evaluated samples of fresh cherry tomatoes and chocolate ice cream for overall liking and liking of key attributes using 15-cm line scales. They were informed that the first sample of each food had no nanotechnology (control), but the subsequent samples were produced with nanotechnology materials. For the tomatoes, nanoparticles were added to the packaging as an anti-microbial or to extend freshness; for the ice cream, nanoparticles were incorporated into the food matrix to deliver probiotics or reduce icing. In reality, no foods were produced with nanotechnology. Participants also completed surveys on their food attitudes and knowledge of nanotechnology. Results showed that all the samples were highly liked, regardless of whether they claimed to deliver nanotechnology benefits. In addition, most (75–86%) participants were willing to buy the nanotechnology foods; the primary reasons being “sensory appeal” and “nanotechnology benefit” (p < 0.01). These results show that a majority of young, educated consumers had positive attitudes towards foods with nanotechnology and were willing to buy them. 相似文献
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对目前食品防腐剂和抗氧化剂研究中的新技术和新方法进行了综述,概述了微胶囊技术和纳米技术定义、特点及在食品防腐剂和抗氧化剂研究中的应用现状及应用前景,微胶囊技术和纳米技术目前在防腐剂和抗氧化剂研究中遇到的问题及使用优势。介绍了乙醇及乙醇气体发生剂,抗菌食品保鲜膜,利用有益菌与腐败菌的营养竞争作用研发的水果防腐剂的研究方法及其应用效果。酒精气体发生剂具有安全性高而且很强地抑制菌类繁殖的能力,有防止食品硬化的效果。抗菌食品保鲜膜在未来一段时间内将综合考虑抗菌、透气、机械强度等性能指标,实现性能的复合化。利用有益菌研究发防腐剂较一般的防腐剂能更好地促进氧气与二氧化碳气的交换,有广阔的应用前景。 相似文献
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The emergence of nanotechnology developments using nanodevices/nanomaterials opens up potential novel applications in agriculture and food sector. Smart delivery systems, biosensors, and nanoarrays are being designed to solve the problems faced in agriculture sector. Similarly, food sector is also benefited through the use of smart biosensors, packaging materials, and nanonutraceuticals. Despite the great potential of nanotechnology in agri-food sector, people are ambiguous about use in food applications because of suspected potential health risks and environmental concerns. Nanoparticles, due to their unique characteristics, including small size, shape, high surface area, charge, chemical properties, solubility and degree of agglomeration can cross cell boundaries or pass directly from the lungs into the blood stream and ultimately reach to all of the organs in the body. This is the reason why they may pose higher risk than the same mass and material of larger particles. In this paper, we have made an attempt to give an overview of nanotechnology developments in agri-food sector, risks associated with nanomaterials and toxicity regulations for policy framework. 相似文献
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