相关实验视频
Updated: Jul 1, 2025

09:00
High Throughput Analysis of Liquid Droplet Impacts
Published on: March 6, 2020
6.4K
液体一致性对透-吸收的影响:对两个大型数据集的贝叶斯分析
James C Borders1, Catriona M Steele2,3,4
1Laboratory for the Study of Upper Airway Dysfunction, Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, United States.
Frontiers in rehabilitation sciences
|March 11, 2024
概括
与薄液体相比,加厚液体显著降低了透吸收风险. 即使是轻度加厚的液体也会显示透吸收量表 (PAS) 的得分降低,提高了吞的安全性.
科学领域:
- 吞生理学 吞生理学
- 消化不良症管理 消化不良症管理
- 食品科学 食品科学 食品科学
背景情况:
- 加厚的液体是减少食障碍中吸入风险的标准.
- 之前的研究经常总结透-渴望量表 (PAS) 评分,可能引入偏见.
- 玻尿素一致性对吞安全性的影响需要进一步研究.
研究的目的:
- 分析液体一致性对PAS分数的影响,使用重复玻尿酸试验的所有数据.
- 为了确定PAS分数是否根据厚化剂类型在特定一致性范围内有所不同.
- 应用贝叶斯的多层次顺序回归模型来进行全面的PAS分数分析.
主要方法:
- 对两个大型数据集 (D1,D2) 的分析,包括患有和没有的成年人.
- 视频光学评估薄和加厚的液体球体 (轻度,中度,极度).
- 贝叶斯多层次顺序回归模型用于评估跨一致性和加厚剂类型的PAS得分.
主要成果:
- 与所有加厚的一致性相比,薄液体的透和吸收事件明显高于薄液体.
- 薄液体的权重PAS得分最高,并且随着厚度的增加而逐渐下降.
- 在薄液体和略厚液体之间,或在粉和香牙加厚剂之间,没有观察到PAS得分的有意义差异.
结论:
- 与薄液体相比,加厚液体的透-吸收概率大大降低.
- 轻度加厚的液体显示出 PAS 严重性的显著降低,提高了吞安全性.
- 液体的一致性,而不是加厚剂类型,是影响吞安全结果的主要因素.
相关概念视频
Viscosity
5.9K
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
The SI unit of viscosity is...
5.9K
Rise of Liquid in a Capillary Tube
1.8K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
1.8K
Surface Tension, Capillary Action, and Viscosity
27.8K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
27.8K
Methods for Studying Drug Absorption: In vitro
234
In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
234
Methods for Studying Drug Absorption: In situ
232
In situ experiments, such as the Doluisio method and Single-Pass Perfusion technique, provide critical insights into drug uptake by simulating in vivo conditions for drug absorption.
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
232
Contact Angle
12.4K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
12.4K

