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Hexagonal shaped ice spicules in frozen antifreeze protein solutions
journal contribution
posted on 2023-05-18, 09:11 authored by Peter Wilson, Gould, M, DeVries, ALIn the presence of antifreeze proteins from both Antarctic and Arctic fishes, water freezes in the form of long c-axis spikes or spicular-like crystals. Transmission electron microscopy of the Pt/C replicas of the freeze fractured spicular ice in a small capillary revealed the presence of many hexagonally shaped structures whose cross-sectional dimensions were between 0.5 and 10 microm. Well-defined parallel faces were associated with most fractured and etched spicules. When fracture planes occurred near the tip of a spicule, well-defined pyramidal faces were apparent. Steps were sometimes associated with these pyramidal spicular crystal faces. On some of the replicas obvious roughening of certain crystal faces of the spicule was observed, suggesting that the antifreeze proteins may have adsorbed to those faces.
History
Publication title
Cryobiology: International Journal of Low Temperature BiologyVolume
44Pagination
240-50ISSN
0011-2240Department/School
College Office - College of Health and MedicinePublisher
Academic Press Inc Elsevier SciencePlace of publication
525 B St, Ste 1900, San Diego, USA, Ca, 92101-4495Repository Status
- Restricted