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大豆脂肪氧合酶研究进展 总被引:3,自引:0,他引:3
脂肪氧合酶(LOX)是影响食品风味和色泽最重要酶之一。该文介绍大豆脂肪氧合酶特性,探讨大豆脂肪氧合酶酶促反应特征和机理,概述大豆脂肪氧合酶对大豆性质影响,总结降低大豆脂肪氧合酶活性方法。 相似文献
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张群 《食品与生物技术学报》2013,(7):784
脂肪氧合酶(Lipoxygenase,EC 1.13.11.12)是一类含有非血红素铁的双加氧酶,其催化生成的不饱和脂肪酸氢过氧化物,可作为面粉增白剂和增香剂、抗肿瘤药物前体、涂料与洗涤剂等生产原料,是非常重要的药物合成和化学合成的中间体,具有巨大的市场需求。自1947年Theorell等首次从大豆中获得了脂肪氧合酶的结晶后,研究人员对其展开了广泛的研究。 相似文献
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以大豆乳清废水中提取的脂肪氧合酶为食品改良剂添加到面条加工中,研究其添加量对面条蒸煮特性、质构特性及感官品质的影响。结果表明:脂肪氧合酶添加量在0.2%~1.0%范围内,面条的吸水率呈上升趋势,而干物质损失率、弹性、硬度等品质特性呈V型变化。当脂肪氧合酶添加量为0.6%时,面条最佳蒸煮时间、断条率及干物质损失率达到最小值,而面条的硬度、弹性及咀嚼性分别增至7 861.318 g、0.903和3 719.072,且脂肪氧合酶添加量对面条黏着性的影响呈先减后增的趋势,当其添加量为0.6%时,面条的黏着性降至-102.62(g·s)。此外,根据面条感官测评结果可知脂肪氧合酶可有效改善面条的黏弹性、色泽及表观状态等感官品质,且当其添加量在0.6%~0.8%范围内,易被消费者所接受。 相似文献
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With the growing demand for more comfortable, healthier and environmentally friendly products, research and development has been increasingly focusing on new environmentally friendly materials and products. One of the environmentally friendly materials is the bamboo fibre with its numerous favourable performing properties. The use of bamboo fibres increases every year, which was the main reason for choosing yarn from the mixture of lyocell fibres and natural bamboo fibres with the ratio 80/20 for the research. With the research, the tensile behaviour of woven fabrics with cotton yarn in warp and lyocell/natural bamboo yarn in the weft direction in comparison with cotton woven fabrics was studied. Twelve fabrics which differed in their construction properties were designed and produced. Two different weaves were chosen, i.e. plain and twill weave, and three different densities in weft. The results of the research show that the presence of lyocell/natural bamboo yarn in the weft direction improves the mechanical properties such as breaking stress, stress in the yield point, elasticity modulus in the weft direction of analysed fabrics, while in the warp direction, the weave type and weave density express a greater influence on the mechanical properties of analysed fabrics. 相似文献
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将不同品质的基础粉按科学比例混合搭配,佐以添加剂或改良剂,从而改变面粉流变学特性,可以生产出种类繁多的优质专用粉。概述了我国学者在配粉研究方面的基础理论,并列举了在我国传统主食馒头、面条专用粉方面的研究成果。 相似文献
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多酚是一种从植物中提取的,具有降血糖、抗炎、抗氧化、抗癌和抗菌特性的化合物。在一定条件下,淀粉可以与多酚发生相互作用,形成两种类型的复合物。一种是非包合物,即酚类化合物的羟基和羰基与淀粉相互作用形成分子间聚集体;另一种是V型包合物,即酚类化合物部分包封在淀粉的内部疏水螺旋内。上述两种复合物均对降低淀粉消化率有积极作用,但受加工方式、淀粉和多酚种类的影响。因此,本文在总结上述因素对淀粉-多酚复合物理化及消化特性影响的基础上,指出目前淀粉-多酚复合物研究中存在的不足之处,提出进一步的研究重点,以期为淀粉-多酚复合物在不同食品中的应用提供参考。 相似文献
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Foxtail millet: Properties,processing, health benefits,and uses 总被引:1,自引:0,他引:1
Nitya Sharma 《Food Reviews International》2018,34(4):329-363
Foxtail millet (Setaria italica L.) is one of the earliest cultivated crops, extensively grown in the arid and semi-arid regions of Asia and Africa, as well as in some other economically developed countries of the world where it is more commonly used as bird feed. This article presents a comprehensive review of the physicochemical and health-functional properties of foxtail millet, and the processing technologies employed to improve these properties and develop more palatable food products. Foxtail millet contains significant levels of protein, fiber, mineral, and phytochemicals. Anti-nutrients such as phytic acid and tannin present in this millet can be reduced to negligible levels by using suitable processing methods. The millet is also reported to possess hypolipidemic, low-glycemic index, and antioxidant characteristics. This review concludes that, like most millet varieties, foxtail millet remains under-utilized as a food source. It is however receiving increased research and commercial attention, especially because its cultivation is not too demanding from point of view of agricultural inputs and it can grow in difficult terrains. It would be reasonable to surmise that foxtail millet has a promising role to play in enhancing nutritional and food security. 相似文献
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M. Nazari Galedar A. Tabatabaeefar A. Jafari A. Sharifi S. S. Mohtasebi H. Fadaei 《International Journal of Food Properties》2013,16(6):1323-1338
In this research, wild pistachio (Pistacia vera L.) nuts and kernels were analyzed for selected geometric properties and mechanical behavior under compression loading. The average length, width and thickness arithmetic and geometric mean diameter of wild pistachio nuts at 5.83% w.b. were 13.98, 8.76, 7.25, 9.93, and 9.75 mm, while the corresponding values of kernels at 6.03% w.b. moisture content were 11.07, 5.92, 4.83, 7.21, and 6.88 mm, respectively. As the moisture content of pistachio nut increased from 5.83 to 30.73% w.b., the bulk density, apparent density and terminal velocity were found to increase from 521 to 543 kgm?3, 809 to 829 kgm?3, and 5.51 to 6.29 ms?1, respectively, whereas porosity decreased from 35.14% to 34.63%. The results revealed that wild pistachio nut required higher rupture force and energy to crack wild pistachio nuts for compression along the L-axis as compared to other two axes. 相似文献