Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Excess Pressure Inside a Drop and a Bubble

Excess Pressure Inside a Drop and a Bubble

The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.

Physical Principles Governing Gas Exchange

Physical Principles Governing Gas Exchange

Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total pressure exerted by...

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...

Distribution of Molecular Speeds

Distribution of Molecular Speeds

The motion of molecules in a gas is random in magnitude and direction for individual molecules, but a gas of many molecules has a predictable distribution of molecular speeds. This predictable distribution of molecular speeds is known as the Maxwell-Boltzmann distribution. The distribution of molecular speeds in liquids is comparable to that of gases but not identical and can help to understand the phenomenon of the boiling and vapor pressure of a liquid. Consider that a molecule requires a...

Compartment Models: Two-Compartment Model

Compartment Models: Two-Compartment Model

The two-compartment model divides the body into central and peripheral compartments to account for varying blood perfusion rates among organs and tissues, affecting drug distribution. The central compartment includes blood and highly perfused tissues with rapid drug distribution, while the peripheral compartment contains tissues with slower drug distribution. After a single IV bolus dose, the drug concentration is high in plasma and low in tissues. The drug distribution between compartments...

External and Internal Respiration

External and Internal Respiration

External respiration occurs in the lungs, and it is the first step in the journey of oxygen inside the body. When we inhale, oxygen enters our lungs and diffuses across the thin alveolar membrane. The alveoli are tiny, air-filled sacs that provide a vast surface area for gas exchange. Oxygen in the alveoli has a higher partial pressure (105 mmHg) than in the adjacent pulmonary capillaries (40 mmHg), establishing a pressure gradient. As a result, oxygen molecules move from the alveoli into the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Growth of a gas bubble in a perfused tissue in an unsteady pressure field with source or sink.

European biophysics journal : EBJ·2019

Same author

Confidence in Procedural Skills before and after a Two-Year Master's Programme in Family Medicine in Gezira State, Sudan.

Advances in medicine·2018

Same author

Telemedicine and E-Learning in a Primary Care Setting in Sudan: The Experience of the Gezira Family Medicine Project.

International journal of family medicine·2016

Same author

The concentration distribution around a growing gas bubble in a bio tissue under the effect of suction process.

Mathematical biosciences·2014

Search research articles

Related Experiment Video

Updated: Jun 16, 2026

Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release

Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release

Published on: June 12, 2021

Concentration distribution around a growing gas bubble in tissue.

S A Mohammadein¹, K G Mohamed

¹Department of Mathematics, Faculty of Science, Tanta University, Tanta, Egypt. selimali2009@yahoo.com

Mathematical Biosciences

|January 21, 2010

Summary

This study models nitrogen gas bubble growth in divers surfacing too quickly. It analyzes bubble concentration distribution during variable and constant decompression, crucial for understanding decompression sickness risks.

More Related Videos

Induction of Cerebral Arterial Gas Embolism in Rat

Induction of Cerebral Arterial Gas Embolism in Rat

Published on: October 18, 2024

Related Experiment Videos

Last Updated: Jun 16, 2026

Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release

Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release

Published on: June 12, 2021

Induction of Cerebral Arterial Gas Embolism in Rat

Induction of Cerebral Arterial Gas Embolism in Rat

Published on: October 18, 2024

Area of Science:

Physiology
Diving Medicine
Biophysics

Background:

Rapid ascent during diving can lead to gas bubble formation in tissues.
Understanding bubble dynamics is critical for preventing decompression sickness.
Existing models are modified to analyze nitrogen bubble growth under varying decompression conditions.

Purpose of the Study:

To analyze the concentration distribution around growing nitrogen gas bubbles in divers.
To investigate bubble growth dynamics during variable and constant decompression.
To present an analytical solution for gas bubble growth rate in tissues.

Main Methods:

Modification of the Sirinivasan et al. (1999) model.
Analytical solution of a mathematical model for bubble growth.
Introduction of concentration distribution analysis around the bubble.

Main Results:

The study provides an analytical solution for gas bubble growth rate post-decompression.
Concentration distribution around the growing bubble is determined.
Factors influencing bubble growth, including ascent rate and tissue diffusivity, are identified.

Conclusions:

The model offers insights into nitrogen bubble behavior in divers surfacing rapidly.
Understanding these dynamics can inform safer decompression strategies.
The research highlights the impact of ascent rate, diffusivity, and other factors on bubble formation.