在不同的水化水平下进行高压加工,作为提高米稳定性和技术功能的一种工具
Eva Grau-Fuentes1, Raquel Garzón1, Dolores Rodrigo1
1Institute of Agrochemistry and Food Technology (IATA-CSIC), Carrer del Catedràtic Agustín Escardino Benlloch, 7, 46980 Paterna, Valencia, Spain.
Food research international (Ottawa, Ont.)
|January 24, 2025
概括
高压加工 (HPP) 有效地减少了米中的微生物,水分含量>15%,但不会使子失活. HPP影响了RB的技术功能和物理化学特性,显示了食品应用的潜力.
科学领域:
- 食品科学与技术 食品科学与技术
- 食品加工 食品加工 食品加工
- 微生物学 微生物学
背景情况:
- 高压加工 (HPP) 被认为可以提高食品安全和保质期.
- 它在低湿度环境中的有效性和对大米 (RB) 属性的影响仍未得到充分研究.
研究的目的:
- 评估HPP在不同水分水平的米 (RB) 上的微生物有效性.
- 研究HPP对RB的技术功能和物理化学特性的影响.
主要方法:
- 在15%,30%,60%和77%的水分水平下,大米 (RB) 样品在15分钟内以500MPa的HPP受到影响.
- 分析了微生物数量 (半菌细菌,菌,酵母,子) 和技术功能/物理化学性质 (食纤维,蛋白质溶解度,过氧化物值,乳化活性).
主要成果:
- 在高达15%的水合度下,HPP显著减少了美索菲尔菌,菌和酵母菌,降低了高达4个日志周期.
- 子无活化没有受到HPP的显著影响. 颗粒聚合和蜂形成发生在≥30%的水分.
- 可溶性食纤维在15%的水分增加. 通过水合,蛋白质溶解性得到改善. 过氧化物值在≤30%的水合量下降,但在>30%的水合量上升.
- 在≥60%的水合下,乳化活性下降,但HPP增强了乳液稳定性.
结论:
- 在中度至高水分水平下,HPP有效减少米中的微生物,对技术功能和物理化学性质产生不同的影响.
- 在食品应用中,HPP有望改善大米 (RB) 的利用,特别是在考虑取决于水分的效果时.
更多相关视频
05:22Transverse Sectioning of Mature Rice Oryza sativa L. Kernels for Scanning Electron Microscopy Imaging Using Pipette Tips as Immobilization Support
Published on: January 25, 2022
3.6K
05:55High-throughput, Microscale Protocol for the Analysis of Processing Parameters and Nutritional Qualities in Maize Zea mays L.
Published on: June 16, 2018
6.8K
相关概念视频
Hydration of Cement
196
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
196
Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
Strength and Heat of Hydration
210
The hydration of cement is an exothermic reaction in which heat is generated as cement hydrates. This heat of hydration is critical to cement's strength development. The rate at which this heat is generated affects the temperature rise, with a majority of the heat being released early in the hydration process, half within the first three days, and about 75% within the first week.
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
210
Porosity in Cement Paste
112
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
112
