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Related Concept Videos

Measuring Reaction Rates03:09

Measuring Reaction Rates

Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical field in...
Fast Reactions01:27

Fast Reactions

Fast reactions occurring in times shorter than the time needed to mix reactants pose a unique challenge for investigation. In a liquid-phase continuous-flow system, reactants A and B are swiftly pushed into the mixing chamber, where mixing occurs within 1 ms. The reaction mixture then flows through an observation tube, and one measures light absorption to determine species concentrations at various points of the tube. This method is most appropriate when relatively large volumes of reactants...
Reaction Rate02:53

Reaction Rate

The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...

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A Microfluidic Device for Quantifying Bacterial Chemotaxis in Stable Concentration Gradients
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Measuring reaction rates on single particles in a microfluidic device.

Meghan M Caulum1, Charles S Henry

  • 1Department of Chemistry, Colorado State University, Fort Collins, CO, USA.

Lab on a Chip
|May 24, 2008
PubMed
Summary

Researchers developed a simple method to measure reaction rates. This technique utilizes magnetic microparticles within a microfluidic device for efficient analysis.

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Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Materials Science

Background:

  • Accurate measurement of reaction rates is crucial for chemical and biological processes.
  • Microfluidic devices offer controlled environments for studying reactions.
  • Magnetic microparticles provide a versatile tool for manipulation and detection.

Purpose of the Study:

  • To develop and validate a straightforward method for quantifying reaction kinetics.
  • To leverage magnetic microparticles and microfluidics for enhanced reaction rate measurements.

Main Methods:

  • Utilizing a microfluidic platform for precise control over reaction conditions.
  • Employing superparamagnetic microparticles for real-time tracking of reaction progress.
  • Developing a magnetic detection system to monitor particle behavior.

Main Results:

  • Demonstrated a simple and effective protocol for measuring reaction rates.
  • Showcased the utility of magnetic microparticles in microfluidic reaction monitoring.
  • Achieved reliable and reproducible kinetic data.

Conclusions:

  • The developed method offers a cost-effective and accessible approach to reaction rate analysis.
  • This technique has potential applications in various fields requiring kinetic studies.
  • Integration of magnetic microparticles and microfluidics provides a powerful analytical tool.