在水中溶解的物质会影响由脉冲的酸石榴石激光产生的主要化气泡
Maarten Meire1, Ben van Aelst1, Aldin Sehovic2
1Ghent University, Ghent, Belgium.
Lasers in medical science
|December 17, 2024
概括
将低化物 (NaOCl) 和1-乙烯-1,1-二酸 (HEDP) 添加到水中会改变其物理性质. 这影响了化气泡的尺寸,速度和持续时间,这对于激光激活灌 (LAI) 至关重要.
科学领域:
- 生物材料科学 生物材料科学
- 流体动力学 流体动力学
- 牙周内科医院 牙周内科医院 牙周内科医院
背景情况:
- 激光激活灌 (LAI) 依赖于内灌剂中的化泡动力学.
- 之前对LAI的研究主要研究了激光参数和水中的纤维尖端设计.
- 灌剂成分对化现象的影响仍未得到充分研究.
研究的目的:
- 研究低酸盐 (NaOCl) 和1-乙烯-1,1-二酸 (HEDP) 对内灌剂物理性质的影响.
- 确定这些灌剂的修改如何影响LAI过程中产生的初级空心气泡的特征.
- 为了将物理性质的变化与观察到的化气泡行为相关联.
主要方法:
- 评估含有NaOCl和不同度HEDP的溶液的物理参数 (密度,表面张力,粘度).
- 使用带有平面和形纤维尖端的脉冲Er:YAG激光器,在准备好的溶液中诱导空洞化.
- 采用高速视频摄影来分析初级化气泡的特征 (尺寸,时间特征).
主要成果:
- NaOCl和HEDP都显著增加了溶液密度,表面张力和粘度.
- HEDP对这些物理性质表现出近线性剂量依赖的作用 (皮尔森相关性>0.95).
- 增加溶液粘度和表面张力降低了化气泡的速度,同时增加了气泡的大小和寿命.
- 较高的HEDP度显著改变了泡形状,特别是在平面纤维尖端.
结论:
- 像NaOCl和HEDP这样的内灌剂改变了基于水的溶液的物理特性.
- 这些变化直接影响到有效的LAI所必需的化泡动态.
- 了解这些流体泡相互作用对于优化LAI协议至关重要.
更多相关视频
08:19Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications
Published on: October 5, 2018
6.4K
08:19Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
2.1K
相关概念视频
02:19Physical 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...
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...
04:01Factors Affecting Solubility
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
03:00Solubility
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules, atoms, and/or ions)...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules, atoms, and/or ions)...
01:26Variables Affecting Phosphorescence and Fluorescence
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
01:31Gas Solubility
Gas solubility in liquids forms liquid-gas solutions, such as soft drinks, where carbon dioxide is dissolved in water, and the ocean, where the solubility of oxygen and carbon dioxide supports marine life. The ability of oceans to dissolve gases impacts weather conditions in the troposphere.However, gas-liquid interactions vary. For instance, hydrogen chloride gas is highly soluble in water, while oxygen's solubility is much lower. Because these solutions are non-ideal, Raoult’s law, which...
01:19Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...