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Related Concept Videos

Calorimetry01:19

Calorimetry

4.9K
When objects at different temperatures are placed in contact with each other but isolated from everything else, they attain thermal equilibrium. A container that prevents heat transfer in or out is called a calorimeter, and the use of a calorimeter to make measurements is called calorimetry. Generally, these measurements involve heat or specific heat capacity. The term "calorimetry problem" is used for any problem where the specified objects are thermally isolated from their...
4.9K
Constant Pressure Calorimetry03:02

Constant Pressure Calorimetry

102.7K
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
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Trophic Efficiency00:46

Trophic Efficiency

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Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
25.9K
Radiation: Applications01:17

Radiation: Applications

2.1K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
2.1K
Constant Volume Calorimetry02:41

Constant Volume Calorimetry

31.9K
Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
31.9K
Quantifying Heat02:46

Quantifying Heat

66.7K
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher...
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Updated: Apr 20, 2026

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism
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Calorespirometry of terrestrial organisms and ecosystems.

Lars Wadsö1, Lee D Hansen2

  • 1Building Materials, Lund University, Box 118, 221 00 Lund, Sweden.

Methods (San Diego, Calif.)
|December 3, 2014
PubMed
Summary

Calorespirometry, a method measuring heat and gas exchange, offers insights into biological systems. This technique enables the evaluation of carbon conversion, growth rates, and environmental responses in various systems.

Keywords:
CalorimetryCarbon dioxideEfficiencyGrowthOxygenThornton’s constant

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Area of Science:

  • Biological Sciences
  • Environmental Science
  • Physiology

Background:

  • Calorespirometry involves simultaneous measurement of heat and gas exchange.
  • It is applicable to diverse biological systems, from ecosystems to tissues.
  • Understanding these exchanges is crucial for assessing fundamental biological properties.

Purpose of the Study:

  • To describe techniques for calorespirometric measurements on terrestrial samples.
  • To present methods and models for evaluating key biological parameters.
  • To highlight the importance of realistic system modeling in data interpretation.

Main Methods:

  • Simultaneous measurement of heat production and gas exchange.
  • Application of calorespirometry to terrestrial (non-aquatic) biological samples.
  • Development and utilization of models for data evaluation.

Main Results:

  • Established techniques for calorespirometry on land-based biological systems.
  • Methods for calculating carbon conversion efficiencies and growth rates.
  • Models enabling assessment of responses to environmental variables.

Conclusions:

  • Calorespirometry is a versatile tool for studying biological systems.
  • Accurate modeling is essential for deriving meaningful insights from calorespirometric data.
  • The technique facilitates model testing across various biological scales.