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Related Experiment Videos

A simple mechanical mixer for small viscous lipid-containing samples

A Cheng1, B Hummel, H Qiu

  • 1Department of Chemistry, Ohio State University, Columbus, 43210, USA.

Chemistry and Physics of Lipids
|November 10, 1998
PubMed
Summary

A new, low dead-volume device efficiently hydrates and mixes small volumes of viscous lipid samples for X-ray analysis. This simple, inexpensive instrument ensures homogeneous hydration and minimal sample loss during preparation.

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Area of Science:

  • Materials Science
  • Biophysics
  • Analytical Chemistry

Background:

  • Hydrating and mixing viscous lipid samples for X-ray analysis presents challenges.
  • Accurate sample preparation is crucial for reliable diffraction and scattering data.

Purpose of the Study:

  • To describe the construction and performance of a novel device for rapid, convenient hydration and mixing of small-volume lipid samples.
  • To facilitate homogeneous hydration and minimize sample loss during preparation for X-ray capillaries.

Main Methods:

  • The device utilizes two microsyringes joined by a coupling needle, creating a low dead-volume system (3.6-11.2 microliters).
  • A technique for determining water content and an accessory for heating/degassing samples during mixing are also presented.

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Main Results:

  • The device enables rapid and convenient hydration and mixing of 10-500 microliter lipid samples.
  • Successful application in studies of lipid mesophase equilibrium and phase transition kinetics.
  • Maximal transfer of homogeneously hydrated lipid into X-ray capillaries with minimal water loss.

Conclusions:

  • The described device offers a simple, cost-effective solution for preparing hydrated lipid samples for X-ray diffraction/scattering.
  • It enhances the accuracy and efficiency of lipid sample analysis.
  • The method is suitable for studying equilibrium and kinetic properties of lipid systems.