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挤压加工对膳食纤维功能与结构的影响 总被引:4,自引:0,他引:4
膳食纤维具有多种重要的生理功能,被认为是第七类营养素。本文综术字膳食纤维的生理功能,加工方法以及挤压加工对膳食纤维的物化特性和晶体结构的影响。 相似文献
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本文介绍了铁在人体内的生理功能、缺铁对人体的影响及铁营养改善的方法。探讨了利用猪血提取血红素铁溶液,添加到面粉中加工富铁面条的方法。 相似文献
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功能性食品基料——谷胱甘肽的研究进展 总被引:22,自引:1,他引:21
谷胱甘肽是机体内重要的活性物质 ,是许多酶反应的辅基 ,具有清除自由基、解毒等多种生理功能。本文从介绍谷胱甘肽的性质、生理功能入手 ,详细论述了它的 4种生产方法和它在功能性食品中的应用情况与发展前景。 相似文献
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微量元素铁与人体健康的关系 总被引:6,自引:0,他引:6
铁是人体必需的微量元素,参与体内氧的转运、交换和组织呼吸过程,维持机体正常造血功能,对人体健康有重要意义。本文从铁的吸收与排泄、铁的生理功能、铁在人体内的分布及需要量等方面阐述了铁与人体健康的关系。 相似文献
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铁蛋白是一种广泛存在于生命体中的铁贮藏蛋白,具有调节机体铁代谢平衡和去除二价铁毒性的双重功能。缺铁严重影响着全球近一半人的健康,研究表明,铁蛋白具有良好的补铁活性而且安全、高效,能够取代具有毒副作用的传统补铁试剂。因此,寻求并开发以铁蛋白为原料的新型补铁功能食品已成为一种趋势。为了更科学地应用于实践和开发,对铁蛋白理化性质及其生物学功能的阐明显得颇为重要。目前,关于铁蛋白铁释放机理的研究分为体外和体内两个方面,体外机理涉及还原剂和螯合剂的共同作用,而体内机理主要涉及降解途径和酶介导的还原释放途径。综述了国内外有关铁蛋白铁释放机理的研究进展,以期为新型补铁功能食品的开发提供理论依据。 相似文献
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生物态补铁剂-血红素铁研究进展 总被引:1,自引:0,他引:1
血红素铁是一种生物态铁,可直接被肠粘膜细胞吸收,不产生任何消化道刺激症状,生物利用率高,是理想补铁剂。该文综述血红素铁结构与性质、功能、提取、测定方法和在食品工业中应用情况。 相似文献
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Iu M Fuza?lov 《Voprosy pitaniia》1976,(4):67-70
In 40 patients suffering from gastrogenic anemia subject to study were the iron content in the daily ration, iron excretion with feces, as well as the level of the serumal iron, the whole blood copper, the number of erythrocytes and the blood hemoglobin level both before the treatment and at different stages of the therapy, 6 mg of copper per day included in the diet. The iron was determined after Henry (1958) and copper after L.N. Lapin (1957). The data obtained indicate that following a regular taking of copper there increases the iron retention in the organism of the patients, this phenomenon being attended by a falling concentration of copper in the whole blood and a rising level of the serumal iron, hemoglobin and an increase in the number of erythrocytes in the peripheral blood. These data confirm the fact of physiological synergism between copper and iron in the organism, including that in the organism of patients with gastrogenic anemia. 相似文献
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缺铁对葡萄生理效应的影响 总被引:2,自引:0,他引:2
以盆栽红地球葡萄为试材,采用MS营养液,研究了全铁、1/2铁、缺铁对葡萄生理特性的影响。结果表明,缺铁30d叶片叶绿素含量显著开始下降,并且叶绿素a降解比叶绿素b幅度大;而1/2铁和全铁60d后才开始下降,降解幅度小;缺铁胁迫30~60d后是葡萄对铁最敏感的时期。不同铁处理(60d)可显著影响丙二醛(MDA)、过氧化物酶(POD)活性和叶片光合速率。 相似文献
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微量元素铁的生理功能及对人体健康的影响 总被引:4,自引:0,他引:4
铁是人体内含量最高的必需微量元素,它有参与氧的运输和贮存,参与合成细胞色素和多种金属酶,增强机体免疫功能等非常重要的生理作用。人体内缺铁或铁过量都会发生相应病变。 相似文献
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铁素的缺乏严重影响着全球近一半人的健康,传统的补铁制剂由于会时人体产生副作用逐渐被禁止使用,因此,寻找安全、高效的补铁制剂势在必行.铁蛋白是广泛存在于生物体中的一种铁贮藏蛋白,它具有去除铁的毒性以及调节铁代谢平衡的双重功能.研究表明,铁蛋白具有良好的补铁活性,所以它可以作为加工原料被开发成补铁型功能食品,为此,对铁蛋白理化性质及其生物学功能的阐明就显得颇为重要.目前,有关铁蛋白的基础研究主要集中于铁蛋白的铁氧化沉淀和还原释放机理的研究,相对于后者而言,铁蛋白铁氧化沉淀机理的研究比较清楚.本文综述了国内外有关铁蛋白铁氧化沉淀机理的研究进展,以期为以后新型补铁功能食品的开发提供理论依据. 相似文献
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生物态补铁剂—血红素铁的研究进展 总被引:1,自引:0,他引:1
血红素铁是一种生物态铁,可以直接被肠黏膜细胞吸收,不产生任何消化道刺激症状,生物利用率高,是理想的补铁剂。本文综述了血红素铁的结构与性质、功能、提取、测定方法和在食品工业中的应用情况。 相似文献
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Xiayun Liao Shaojun Yun Guanghua Zhao 《Critical reviews in food science and nutrition》2014,54(10):1342-1352
Ferritins are members of the superfamily of iron storage and detoxification proteins present in all living organisms and play important roles in controlling cellular iron homeostasis. In contrast to animal ferritin, relatively little information is available on the structure and function of phytoferritin. Phytoferritin is observed in plastids whereas animal ferritins are largely found in the cytoplasm of cell. Compared to animal ferritin, phytoferritin exhibits two major distinctive features in structure. First, phytoferritin contains a specific extension peptide (EP) at the N-terminal while animal ferritin lacks it. The EP is located on the exterior surface of protein, which recently has been found to act as a second ferroxidase center for iron-binding and oxidation, and regulate iron release during the germination and early growth of seedlings. Second, only H-type subunit has been identified in phytoferritin, which is usually a heteropolymer consisting of two different subunits, H-1 and H-2, sharing ~80% amino acid sequence identity. These two subunits in phytoferritin play a positively cooperative role in iron oxidative deposition in protein. Iron deficiency anemia (IDA) is the most common and widespread nutritional disorder in the world, so it is crucial to explore a safe and efficient functional factor for iron supplement. Fortunately, phytoferritin seems to be a suitable candidate. In legume seeds, more than 90% of iron is stored in the form of ferritin in amyloplasts. Recently, some studies at different levels have demonstrated that plant ferritin could be used as novel, utilizable, plant-based forms of iron for populations with a low iron status. This review focuses on recent progress in structure, function, and nutrition of phytoferritin. 相似文献