共查询到20条相似文献,搜索用时 187 毫秒
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张群 《食品与生物技术学报》2020,(2):112-112
重组人源胶原蛋白是基于人胶原蛋白的特征和主要功能序列重新优化设计的基因序列,表达的蛋白质是设计序列翻译的具有人胶原蛋白特征的蛋白质。与传统提取获得的胶原蛋白相比,具有可加工性、无病毒隐患、水溶性好、批次稳定和排异反应低等优点。 相似文献
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在烹调过程中,原料本身的性质,往往决定了其加工工艺和成菜质量;而在动物原料中,胶原蛋白的存在和多少,则是影响原料质地、性能、加工工艺以至成菜质量的重要关键。胶原蛋白存在于动物结缔组织。一般而言,构成结缔组织的蛋白质主要是胶原蛋白和弹性蛋白,它们以纤维状存在于结缔组织,并赋予机体以韧性和伸缩性。但是,弹性蛋白的化学性质很稳定且含量较少,因而在烹调中对原料质地和原料加工工艺起主要作用的就是胶原蛋白了。一、胶原蛋白的性质胶原蛋白广泛分布在动物的韧带、皮、腱、肌束膜及某些内脏之中。由胶原蛋白构成的原料许多都为烹调… 相似文献
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Significant improvement for the functional properties of konjac glucomannan based on phase separation
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Qing Huang Honghe Ge Weiping Jin Bakht R. Shah Shuxin Ye Ying Hu Bin Li Yijie Chen 《International Journal of Food Science & Technology》2016,51(11):2396-2405
Konjac glucomannan (KGM) serves as a stabiliser due to its high molecular weight and viscosity. However, these properties limit its addition in food products, especially in drinks. The main aim of this study was to improve the functional properties of KGM by a green and effective method, that is phase separation. It was found that increasing temperature accelerated phase separation of KGM/gum arabic mixture. KGM‐rich phase was characterised and its physical properties were investigated by different methods. Crystal property showed no significant changes after phase separation. Nevertheless, rheological properties indicated that the viscosities of samples after phase separation (FKGM) decreased dramatically. Their emulsifying capacities also improved. Moreover, the differences in molecular rearrangement at the oil–water interface were also studied by using interfacial rheology. These results suggested that FKGM with low viscosity had better interfacial properties, and thus may have potential applications as food ingredients. 相似文献
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Zi-Zi Hu Xiao-Mei Sha Tao Huang Chun-Hong Yuan Wen-Mei Chen Xiao-Xiao Li Zong-Cai Tu 《International Journal of Food Science & Technology》2021,56(11):5812-5823
Fish gelatin (FG) has similar functional properties to mammalian gelatin and is a potential mammalian gelatin substitute. However, its poor gelling properties limit its application in many fields. Early on, γ-polyglutamic acid (γ-PGA) was found to be effective in improving the gel properties of FG. Therefore, the gelling properties and structure of γ-PGA to FG under different pH levels were further studied in this article. When the pH of the system is 3, γ-PGA is positively charged; when the pH of the system is ≥5, γ-PGA is negatively charged, while FG is positively charged, so the change of the pH of the system affects the electrostatic binding ability of FG and γ-PGA. A γ-PGA concentration of 0.04% (w/v) and FG at pH 5 yielded the best gelling properties. Moreover, pH affected the formation of helices during gelatin gelation, and it had a significant effect on the nanostructure of FG. The relationship between structure and physicochemical properties was proposed as a schematic model. 相似文献
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Fred F. Shih Karen L. Bett-Garber Kim W. Daigle Daphne Ingram 《Journal of food science》2005,70(1):S18-S21
ABSTRACT: Okra was coated and deep-fat fried with batters of flour sources including rice flour, a mixture of rice flour and small amounts of pregelatinized rice flour (PGRF), and, as a control, traditional wheat flour. The addition of PGRF, up to 8%, enhanced batter viscosity and the coating properties of the rice batter. Oil uptake of the fried batter decreased with the addition of up to 5% PGRF. Rice flour fried batters, with and without PGRF, were found to absorb substantially lower oil, by as much as 51 %, compared with the wheat batter. The fried okra coated with the rice batter containing 5% PGRF, when evaluated for sensory properties on appearance and surface attributes, was found to be superior or equal to those with the wheat batter and rice batter without PGRF. Particularly, its golden brown color is considered more desirable than the lighter yellow color of the other 2 entities. Similarly, most of its 1st-bite and after-chew properties were slightly better and were in the normal range of commercially available products. Specifically, its distinctive crispiness is considered a positive attribute, whereas its slightly higher tooth packing properties, while remaining in the range of commercial products, may be noticeable to some consumers. 相似文献
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蛋白质对食品的色、香、味及组织结构等具有重要意义。近年来,越来越多的研究发现蛋白质的力学性质有助于改善食品的营养、风味、口感、质地。本文综述了食品中蛋白质的力学性质及其影响因素,阐述了蛋白质结构、功能与作用力之间的关系,蛋白质分子内和分子间相互作用力的改变导致蛋白质三维结构发生变化,进而影响其功能。分析了由热诱导产生的蛋白质分子内的力学性质,包括蛋白质折叠热力学稳定性和蛋白质解折叠的动力学性质,以及由热剪切产生的蛋白质分子间的粘弹性和力学强度。总结了影响蛋白质力学性质的主要因素,包括蛋白质溶液系统的自由能、蛋白质的构象、溶剂与外界环境条件、机械力的拉伸等。提出了蛋白质的力学性质对食品品质的调控具有参考价值,并对食品中蛋白质的加工与新产品的开发前景作出展望。 相似文献