Search research articles

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 Journal Methods Collections JoVE Encyclopedia of Experiments 存档

教育

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual 教师资源中心教师网站

使用条款与条件

相关概念视频

Viscosity

Viscosity

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...

Gauss's Law

Gauss's Law

If a closed surface does not have any charge inside where an electric field line can terminate, then the electric field line entering the surface at one point must necessarily exit at some other point of the surface. Therefore, if a closed surface does not have any charges inside the enclosed volume, then the electric flux through the surface is zero. What happens to the electric flux if there are some charges inside the enclosed volume? Gauss's law gives a quantitative answer to this question.

Van de Graaff Generator

Van de Graaff Generator

Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...

Design Example: Vintage Mixing Console

Design Example: Vintage Mixing Console

A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...

Viscosity

Viscosity

Viscosity is a property of fluids that measures their resistance to flow. It is influenced by factors such as the surface area of contact, the gradient of flow speed, and the fluid's viscosity constant, called the coefficient of viscosity. The coefficient of viscosity, also known as dynamic viscosity, is denoted by the symbol η. It determines the proportionality between the viscous force and the gradient of flow speed.Newton's law of viscosity states that the viscous force on a...

Vagina

Vagina

The vaginal canal is a tubular structure averaging about 10 cm in length that acts as the entryway to the female reproductive system and the passageway for menstrual flow and childbirth. The interior walls of the vagina exhibit concentric folds called rugae and are topped by an area known as the fornix, which connects with the protruding cervical portion of the uterus. This canal is comprised of an external fibrous layer, a muscular middle layer, and an inner lining with mucosal rugae, which...

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

Improved Microplastic Identification from Simultaneously Collected Photothermal Infrared and Raman Spectra Using Multiview Conformal Prediction.

ACS measurement science au·2026

Same author

Preserving Gadolinium Speciation in Environmental Waters: Establishing Hold Times and Storage Protocols for Reliable Analysis.

ACS ES&T water·2026

Same author

Nanoscale Interfacial Organization Governs Maturation and Collapse in Passive versus Active Condensates.

Journal of the American Chemical Society·2026

Same author

Pre-existing particle composition controls the initial viscosity and aging of α-pinene-derived secondary organic aerosol.

Environmental science: atmospheres·2026

Same author

Avoiding and reducing microplastic false positives from dry glove contact.

Analytical methods : advancing methods and applications·2026

Same author

Characterizing microscopic calcification deposits on acrylic intraocular lenses.

The Analyst·2026

Search research articles

相关实验视频

Updated: May 4, 2026

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication

Published on: June 5, 2016

致敬维基·格拉西安

Andrew P Ault¹, Gayan Rubasinghege², Douglas J Tobias³

¹Department of Chemistry, College of Literature Sciences and the Arts, University of Michigan, Ann Arbor, Michigan 48109, United States.

The journal of physical chemistry. A

|August 28, 2025

概括

No abstract available in PubMed .

更多相关视频

Eliciting and Analyzing Male Mouse Ultrasonic Vocalization USV Songs

Eliciting and Analyzing Male Mouse Ultrasonic Vocalization USV Songs

Published on: May 9, 2017

Author Spotlight: Revolutionizing Research on Vaginal Microbiome Interactions Using a Vaginal Chip

Author Spotlight: Revolutionizing Research on Vaginal Microbiome Interactions Using a Vaginal Chip

Published on: February 16, 2024

相关实验视频

Last Updated: May 4, 2026

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication

Published on: June 5, 2016

Eliciting and Analyzing Male Mouse Ultrasonic Vocalization USV Songs

Eliciting and Analyzing Male Mouse Ultrasonic Vocalization USV Songs

Published on: May 9, 2017

Author Spotlight: Revolutionizing Research on Vaginal Microbiome Interactions Using a Vaginal Chip

Author Spotlight: Revolutionizing Research on Vaginal Microbiome Interactions Using a Vaginal Chip

Published on: February 16, 2024