通过微波技术对天然粮食资源进行增值:通过介电加热稳定Purslane
Marco Apicella1, Giuseppe Amato1, Pietro de Bartolomeis2
1Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy.
Foods (Basel, Switzerland)
|January 17, 2024
概括
与传统方法相比,微波干燥可以在 (Portulaca oleracea L.) 中保存更多有益的脂肪酸和植物. 这种可持续的技术增强了松的营养特征,使其成为一种有价值的食物来源.
科学领域:
- 食品科学与技术 食品科学与技术
- 可持续农业 可持续农业
- 营养化学 营养化学
背景情况:
- 微波辅助干燥为食品稳定提供可持续的加工,特别是在农业食品行业.
- 紫罗兰 (Portulaca oleracea L.) 是一种富含营养的植物,具有抗氧化和药理性质,具有作为未来食品成分的潜力.
- 了解干燥过程中的热量和质量转移对于保持植物性食品的营养质量至关重要.
研究的目的:
- 评估不同干燥方法 (对流式,微波辐射,微波真空辐射) 对的营养特征的影响.
- 调查干燥速度和热量/质量转移现象对保鲜中关键化合物的保存作用.
- 通过优化干燥技术,探索将从杂草转化为价值化的食物来源的潜力.
主要方法:
- 应用对流式,微波辐射和微波真空辐射干燥协议,用于不同部分的Purslane (尖端,枝条,整个结构).
- 使用气体染色学-质谱学 (GC/MS) 分析提取物,对干燥的草样本进行化学表征.
- 通过不同的方法对脂肪酸和植物的干燥时间和保存率进行比较分析.
主要成果:
- 与对流干燥相比,微波处理显著改善了草中的脂肪酸 (SFAs,MUFAs,PUFAs) 和植物的保存.
- 脂肪酸占顶部部分的总成分的90%以上,而在微波真空干燥的整个鱼样品中占85%.
- 微波处理中的干燥速度比对流方法快三倍,影响化学成分和保存.
结论:
- 微波辅助干燥是一种优秀的技术,可以保持松的营养质量,特别是其有价值的脂肪酸和植物含量.
- 通过微波技术实现的快速干燥率有助于提高保存和缩短处理时间.
- 优化的微波干燥协议可以有效地利用紫,支持其作为功能性食品成分的发展.
关键词:
葡萄兰 (Portulaca oleracea) L. 葡萄兰 (Portulaca oleracea) L. 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (Portulaca oleracea) 葡萄兰 (L.介电加热 介电加热 介电加热脂肪酸 脂肪酸 脂肪酸 脂肪酸粮食回收 粮食回收 粮食回收未来的食物 未来的食物微波干燥技术 微波干燥技术植物醇是一种植物醇.价值化的价值化相关概念视频
Standing Waves in a Cavity
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Physical Methods for Controlling Microbial Growth: Temperature
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
Pasteurization and Food Preservation
Pasteurization is a widely employed thermal processing technique designed to enhance the safety and shelf life of perishable food and beverages. By subjecting products to specific high temperatures for controlled durations, this method effectively inactivates pathogenic microorganisms and spoilage enzymes without significantly compromising sensory qualities. The technique has been pivotal in food safety management, especially for consumables susceptible to microbial contamination such as milk,...
Principles of Food Preservation
Food spoilage results from microbial growth, enzymatic activity, and environmental factors that gradually degrade the sensory, nutritional, and safety qualities of food. Preservation techniques aim to slow or halt these processes to extend shelf life and maintain product quality.A key concept in food microbiology is the microbial growth curve, which includes four phases: lag, exponential (log), stationary, and death. During the lag phase, bacteria adjust to their environment without significant...
Methods of Controlling Food Spoilage
Food spoilage is caused by microbial growth or by chemical and physical changes, all of which affect the taste, texture, and safety of food.Temperature-Based PreservationRefrigeration at 0–4 °C slows microbial growth and enzyme activity, making it ideal for short-term storage. However, certain spoilage organisms—such as psychrotrophs like Listeria monocytogenes—can still proliferate at these temperatures. Freezing below -18 °C further slows biological processes by forming ice crystals, which...


