Abstract
The nanoliter osmometer is one of the most common tools in the study of ice-binding proteins (IBPs). It is used not only to measure the thermal hysteresis activity of IBPs but also to explore ice sha**, ice adhesion, and ice growth and melting rates and patterns. The advantage of the nanoliter osmometer for the IBP study and for studying single ice crystals lies in the small sample volume, in the range of nanoliters. Such a small volume enables precise determination and control of the temperature with precision in the range of millidegrees. This chapter describes in detail the process of determination of thermal hysteresis using a nanoliter osmometer operated by a LabVIEW interface. We describe the preparation of suitable capillaries and sample injection, which is a challenging step in the measurement. We then describe the procedure of single crystal formation and the determination of the melting and freezing temperatures. Insights on crucial parameters are emphasized.
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Acknowledgments
We thank the Israel Science Foundation for financial support.
Conflict of Interest
The corresponding author, Ido Braslavsky, was a co-founder of μIce, which produces nanoliter osmometers, with the editor of this Methods book, Ran Drori.
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Pariente, N., Bar Dolev, M., Braslavsky, I. (2024). The Nanoliter Osmometer: Thermal Hysteresis Measurement. In: Drori, R., Stevens, C. (eds) Ice Binding Proteins. Methods in Molecular Biology, vol 2730. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3503-2_5
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DOI: https://doi.org/10.1007/978-1-0716-3503-2_5
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