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Constant Pressure Calorimetry

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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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Updated: Jul 2, 2026

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol

Published on: June 8, 2017

Pressure-jump apparatus suitable for repetitive experiments.

T Yasunaga¹, N Tatsumoto, S Harada

¹Department of Chemistry, Faculty of Science, Hiroshima University, Hiroshima, Japan.

The Review of Scientific Instruments

|December 1, 1978

Summary

This summary is machine-generated.

A new repetitive pressure-jump apparatus was developed to measure small solution relaxation effects. Signal averaging improved data quality despite slower pressure rise times, enabling accurate relaxation spectrum analysis.

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Last Updated: Jul 2, 2026

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol

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A Cost-effective and Reliable Method to Predict Mechanical Stress in Single-use and Standard Pumps

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Published on: August 5, 2015

Area of Science:

Physical Chemistry
Chemical Kinetics
Solution Dynamics

Background:

Understanding molecular processes in solution often requires kinetic measurements.
Traditional pressure-jump techniques face limitations in sensitivity and speed.
Characterizing small relaxation effects is crucial for elucidating reaction mechanisms.

Purpose of the Study:

To develop and validate a novel repetitive pressure-jump apparatus.
To measure small relaxation effects in solution with enhanced precision.
To assess the efficacy of signal averaging in improving relaxation spectrum quality.

Main Methods:

Construction of a repetitive pressure-jump apparatus.
Measurement of relaxation effects in solution using the developed apparatus.
Application of signal averaging techniques to enhance the signal-to-noise ratio.

Main Results:

The apparatus successfully measured small relaxation effects in solution.
Signal averaging significantly improved the signal-to-noise ratio of the relaxation spectrum.
The developed method provides a viable alternative for studying fast kinetics.

Conclusions:

The repetitive pressure-jump apparatus is effective for measuring small relaxation effects.
Signal averaging is a powerful tool for enhancing data quality in kinetic studies.
This technique offers new possibilities for exploring solution dynamics.