相关实验视频

Updated: May 15, 2025

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

水活动和温度对无形碳水化合物粉末的制特性的影响

Sukritta Anantawittayanon¹, Takumi Mochizuki¹, Kiyoshi Kawai¹

¹1 Graduate School of Integrated Sciences for Life, Hiroshima University.

Journal of applied glycoscience

|April 9, 2025

概括

在无形碳水化合物粉中制作蛋糕受温度和含水量的影响. 高水活性促进结,使水作为粘合剂,导致更硬的蛋糕.

科学领域:

食品科学食品科学食品科学
材料科学材料科学材料科学
物理化学物理化学

背景情况:

水吸附可塑化无形碳水化合物,降低它们的玻璃过渡温度 (Tg).
当Tg低于储存温度 (T) 时,发生化,从而启动玻璃到的过渡.
关于无形粉末温度升高引起的凝结的知识有限.

研究的目的:

研究经过温度循环的无形碳水化合物粉末的凝结特性.
确定水活性 (aw) 和水分水平在温度诱导的凝结中的作用.
分析水在凝结过程中如何作为粘合剂.

主要方法:

准备的马尔托德和葡萄糖混合物,比例不同.
粉末在不同的水活动中经受温度循环 (25°C到更高的T,然后再回到25°C).
评估结行为和测量骨折应力.

主要成果:

具有高水活性的温度循环粉末表现出类似于aw循环样本的凝结.
低水活性T循环粉末抵御凝结,即使在状状态.
断裂应力随着T - Tg的增加而增加,这表明水的结合作用和更硬的蛋糕形成.

结论:

水分子作为结合剂,在高水活性条件下促进凝结.
存在一个特定的水合水平,水从塑化剂过渡到粘合剂.
了解水的作用对于控制无形碳水化合物系统中的凝结至关重要.

关键词:

无形粉末是一种无形的粉末.蛋糕制作蛋糕制作蛋糕制作骨折的压力压力是骨折的压力玻璃过渡温度是玻璃过渡温度.水的吸收水分.

更多相关视频

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Published on: May 19, 2019

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Published on: September 5, 2018

相关概念视频

Polymer Classification: Crystallinity

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...

Strength and Heat of Hydration

Strength and Heat of Hydration

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...

Porosity and Absorption of Aggregate

Porosity and Absorption of Aggregate

Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...

Physical Properties Affecting Solubility

Physical Properties Affecting Solubility

Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...

Design Example: Managing Concrete Workability

Design Example: Managing Concrete Workability

This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.

States of Water

States of Water

Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...