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Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism
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Published on: May 31, 2018

LC-circuit calorimetry.

O Bossen1, A Schilling

  • 1Physik-Institut der Universität Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.

The Review of Scientific Instruments
|October 7, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a novel calorimeter using Peltier elements and electrical circuits to measure heat capacity. This new technique offers improved accuracy with reduced statistical uncertainty compared to conventional methods.

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Thermal Measurement Techniques in Analytical Microfluidic Devices
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Thermal Measurement Techniques in Analytical Microfluidic Devices
08:29

Thermal Measurement Techniques in Analytical Microfluidic Devices

Published on: June 3, 2015

Area of Science:

  • Thermodynamics
  • Electrical Engineering
  • Materials Science

Background:

  • Accurate measurement of heat capacity is crucial for understanding material properties.
  • Conventional methods for heat capacity measurement have limitations in precision and measurement time.
  • Developing novel calorimetric techniques can enhance experimental capabilities.

Purpose of the Study:

  • To present a new calorimeter design utilizing Peltier elements and electrical oscillations.
  • To demonstrate a method for accurately measuring heat capacity with improved statistical uncertainty.
  • To validate the new technique using a gadolinium sample near its ferromagnetic transition.

Main Methods:

  • Coupling an unknown heat capacity to an electrical circuit with Peltier elements.
  • Achieving autonomous oscillations using an electrical inductance and amplifier.
  • Measuring resonance frequency to determine heat capacity.
  • Testing the calorimeter on a gadolinium sample.

Main Results:

  • The new calorimeter achieves autonomous oscillations.
  • Heat capacity is accurately measured via resonance frequency.
  • The intrinsic statistical uncertainty decreases as ~t(m)(-3/2) with measuring time t(m).
  • This uncertainty reduction surpasses the conventional alternating current method's ~t(m)(-1/2).

Conclusions:

  • The developed calorimeter offers a more precise method for heat capacity determination.
  • The technique shows significant improvement in statistical uncertainty reduction over time.
  • The feasibility is demonstrated, paving the way for advanced calorimetric measurements.