相关实验视频
Updated: Jun 4, 2025

00:05
Preparation of High-Quality Fermented Fish Product
Published on: August 23, 2019
10.3K
温度条件对老化黑的物理化学质量的影响
Jung-Hye Shin1, Min-Jung Kang1, Bo Hyun Lee2,3
1Namhae Garlic Research Institute, Namhae-gun 52430, Republic of Korea.
Foods (Basel, Switzerland)
|December 17, 2024
概括
不同的温度协议显著影响黑 (BG) 的质量. 逐渐加热和冷却 (GHC) 增加了多和糖,而快速加热和冷却 (RHC) 增加了S-基氨酸 (SAC) 和保持水分.
科学领域:
- 食品科学 食品科学 食品科学
- 生物技术是生物技术.
- 农业化学 农业化学
背景情况:
- 黑 (BG) 的生产涉及到受控的老化.
- 温度调节是影响BG化学成分和质量的关键因素.
- 了解这些效应对于优化BG用于各种应用至关重要.
研究的目的:
- 为了研究两个不同的温度协议对黑质量的影响.
- 在不同的老化条件下分析物理化学性质和关键生物活性化合物的变化.
- 确定生产具有特定期望特性的黑的最佳温度策略.
主要方法:
- 应用了两个温度协议:逐渐加热和冷却 (GHC) 和快速加热和冷却 (RHC).
- 分析包括表面的颜色,硬度,水分,pH值,果糖,多总含量 (TPC),艾林,S-氨基氨酸 (SAC) 和γ-glutamyl-S-allylcysteine (γ-GSAC).
- 在整个老化过程中进行了测量,以跟踪动态变化.
主要成果:
- 到第15天,GHC显著增加了总多含量 (TPC) 和果糖.
- 与GHC相比,RHC的结果是S-基氨酸 (SAC) 度大约是GHC的1.7倍.
- RHC显示出优越的水分保留,而GHC诱导了更明显的表面颜色变化 (轻度,红色).
结论:
- GHC是最佳的黑生产专注于更高的多和糖含量.
- RHC更适合生产富含S-氨素 (SAC) 的黑,可以更好地保持水分.
- 在老化过程中精确的温度控制允许为特定的食品和药物用途量身定制的黑生产.
相关概念视频
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...
The Scientific Method
224.1K
The scientific method is a detailed, empirical problem-solving process used by biologists and other scientists. This iterative approach involves formulating a question based on observation, developing a testable potential explanation for the observation (called a hypothesis), making and testing predictions based on the hypothesis, and using the findings to create new hypotheses and predictions.
Generally, predictions are tested using carefully-designed experiments. Based on the outcome of these...
Generally, predictions are tested using carefully-designed experiments. Based on the outcome of these...
224.1K
Key Techniques in Microbiology
Aseptic techniques prevent contamination, ensure experimental accuracy, and protect researchers and microbial cultures. These techniques are essential in clinical, industrial, and research settings where sterility is required.Maintaining Sterility in Laboratory PracticesScientists maintain sterility by sterilizing tools with heat or chemicals, disinfecting work surfaces, and handling cultures in controlled environments. Working near an open flame or within a laminar flow hood reduces the risk...
Responses to Heat and Cold Stress
13.4K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.4K
Microorganisms in Agriculture and Food industry
Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...
Factors Influencing Microbial Growth: pH
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...

