Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

9.4K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
9.4K
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

6.6K
To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
6.6K
Porosity in Cement Paste01:18

Porosity in Cement Paste

627
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
627

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Machine learning evaluation of structural descriptors for supercooled water.

Communications chemistry·2026
Same author

Long-term remodeling of compliance matched tissue engineered vascular grafts is sex specific.

Acta biomaterialia·2026
Same author

Pharmacophore-Based QSAR Model of Multi Scaffolds as NAMPT Inhibitors & Scaffold Diversity Analysis.

Molecules (Basel, Switzerland)·2026
Same author

Classification of interfacial water governed by water-polymer interactions in hydrated polymers: A molecular dynamics simulation study of ethylene-based and acrylate polymers.

The Journal of chemical physics·2026
Same author

Benchmarking thermostat algorithms in molecular dynamics simulations of a binary Lennard-Jones glass-former model.

The Journal of chemical physics·2026
Same author

Structural Tuning of Inefficient <i>C</i> <sub>1</sub>‑Symmetric Iodoarene for Efficient Enantioselective Oxidative Organocatalysis.

ACS omega·2026

相关实验视频

Updated: May 6, 2026

Sediment Core Sectioning and Extraction of Pore Waters under Anoxic Conditions
09:21

Sediment Core Sectioning and Extraction of Pore Waters under Anoxic Conditions

Published on: March 7, 2016

9.1K

使用剪切波弹性学,核记录和显微镜技术进行表面泥平沉积物的表征)

Gabriel R Venegas1,2, Jane McCue2, Yu-Hsuan Chao3

  • 1Center for Acoustics Research and Education, University of New Hampshire, Durham, New Hampshire 03824, USA.

The Journal of the Acoustical Society of America
|September 3, 2025
PubMed
概括

剪切波弹性图 (SWE) 不侵入地绘制了沉积物的异质性,揭示了孔隙连接的硬性和变化. 这种方法可以了解表面沉积物中的弹性波形特性.

更多相关视频

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod
06:06

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod

Published on: August 17, 2016

11.4K
Author Spotlight: Characterizing Environmental Biofilm Mechanics Using Optical Coherence Elastography and its Applications in Wastewater Treatment
04:51

Author Spotlight: Characterizing Environmental Biofilm Mechanics Using Optical Coherence Elastography and its Applications in Wastewater Treatment

Published on: March 1, 2024

1.1K

相关实验视频

Last Updated: May 6, 2026

Sediment Core Sectioning and Extraction of Pore Waters under Anoxic Conditions
09:21

Sediment Core Sectioning and Extraction of Pore Waters under Anoxic Conditions

Published on: March 7, 2016

9.1K
Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod
06:06

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod

Published on: August 17, 2016

11.4K
Author Spotlight: Characterizing Environmental Biofilm Mechanics Using Optical Coherence Elastography and its Applications in Wastewater Treatment
04:51

Author Spotlight: Characterizing Environmental Biofilm Mechanics Using Optical Coherence Elastography and its Applications in Wastewater Treatment

Published on: March 1, 2024

1.1K

科学领域:

  • 地质学
  • 听力学
  • 沉积物学

背景情况:

  • 表面沉积物由于物理,生物和化学过程而表现出复杂的异质性.
  • 这种异质性显著影响弹性波的传输和散射.
  • 需要使用非侵入性技术来描述这些微妙的表面层.

研究的目的:

  • 在表面沉积物中应用剪切波弹性图像 (SWE) 来获得剪切速度异质性的高分辨率成像.
  • 将弹性特性与微观结构特征相关联.
  • 研究沉积物结构与波浪传播之间的关系.

主要方法:

  • 在新罕布什尔州的泥中采集的样本.
  • 声波辐射力产生了剪切波 (50-200赫兹).
  • 高率超声波成像剪切波传播,创建2D剪切速度地图.
  • 分析了沉积物微观结构的显微镜技术.

主要成果:

  • 在较软的矩阵 (~2 m/s) 中,SWE 发现了毫米级的硬 (高达16 m/s).
  • 空间光谱分析显示切割速度强度在-42到-38dB/m之间.
  • 阳性剪切速度梯度与孔隙连接性降低和谷物连接性增加相关.

结论:

  • 剪切波弹性学对于表层沉积物的细度异质性是有效的.
  • 沉积物微观结构,特别是颗粒接触和有机粘土含量,影响弹性波特性.
  • 这些发现支持对滑,符合标准的接触者的粒度剪切模型.