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Related Concept Videos

Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
Chemical Factors Affecting Respiration Centers01:31

Chemical Factors Affecting Respiration Centers

Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
CO2 has a potent influence on respiration and is strictly regulated. Under...
Alterations in Respiration II01:30

Alterations in Respiration II

There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Carbon Dioxide Transport in the Blood01:19

Carbon Dioxide Transport in the Blood

Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...
Turbulent Flow: Problem Solving01:09

Turbulent Flow: Problem Solving

Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures enhance...
Physiological Control of Respiration01:23

Physiological Control of Respiration

Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...

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Related Experiment Video

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Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
07:52

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Published on: January 29, 2011

Temperature-controlled 'breathing' of carbon dioxide bubbles.

Ethan Tumarkin1, Zhihong Nie, Jai Il Park

  • 1Department of Chemistry, University of Toronto, Toronto, Ontario, Canada.

Lab on a Chip
|August 27, 2011
PubMed
Summary

Microfluidic studies reveal carbon dioxide (CO2) bubble dynamics under temperature changes. This "bubble breathing" phenomenon demonstrates controlled gas transfer in various liquids, applicable to other gases.

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Area of Science:

  • Physical Chemistry
  • Chemical Engineering
  • Fluid Dynamics

Background:

  • Understanding gas transfer between liquid and gas phases is crucial for industrial processes and environmental science.
  • Temperature significantly influences gas solubility and transfer rates.
  • Existing methods for studying gas-liquid transfer can be limited in precision and control.

Purpose of the Study:

  • To develop and demonstrate a microfluidic (MF) approach for precisely studying temperature-mediated carbon dioxide (CO2) transfer.
  • To investigate the dynamic behavior of CO2 bubbles in response to controlled temperature cycles.
  • To explore CO2 dissolution in diverse liquid systems using the MF platform.

Main Methods:

  • Generation of uniform, micrometer-diameter CO2 bubbles in aqueous or organic liquids within a microfluidic device.
  • Application of controlled cooling-heating-cooling temperature cycles to the CO2 bubbles in a downstream channel.
  • Observation and analysis of bubble volume changes, termed 'bubble breathing', in response to temperature variations.
  • Examination of CO2 dissolution in deionized water, 0.7 M NaCl solution, ocean water, and dimethyl ether of poly(ethylene glycol).

Main Results:

  • CO2 bubbles exhibited reversible contraction and expansion in response to cooling and heating cycles, respectively ('bubble breathing').
  • The MF approach allowed for precise control and observation of temperature-dependent CO2 bubble dynamics.
  • Differential CO2 dissolution behavior was observed across the tested liquid systems, including water, saline solutions, and organic solvents.

Conclusions:

  • The microfluidic approach provides a powerful tool for investigating gas-liquid transfer phenomena influenced by temperature.
  • The observed 'bubble breathing' phenomenon highlights the sensitivity of CO2 bubble volume to thermal gradients.
  • This MF methodology is adaptable for studying the temperature-dependent solubility of other gases in various liquids.