The Hydration Forces Explanation: what it doesn't say
The hydration force explanation (HFE) gives mechanisms for several types of
ulstrastructural damage produced by freezing and dehydration. It is explained on other pages. Unfortunately, the HFE has been misquoted in the literature, and some of these misquotations have been propagated unwittingly by other authors. Here is a list of some of the explicit misquotations that are known to us, and notes about what we actually say in our papers that are so badly misquoted.
- Crowe et al [1] say "(Pincet et al [2]) published findings that they suggest also call the water replacement hypothesis into question".
On the contrary, Pincet et al never mention the water replacement hypothesis, and do not call it into question. See [2].
- Crowe et al [1] say "(Pincet et al [2]) found that trehalose does not affect interbilayer surface pressures between two fully hydrated bilayers".
On the contrary, Pincet et al [2] did not measure 'interbilayer surface pressures' (whatever they might be) and never used that phrase. See [2].
- Crowe et al [1] say "Bryant and Wolfe [3]" (predict that) "glucose inhibits the fusion of membranes".
On the contrary, Bryant and Wolfe make no mention of glucose and no comments on how solutes might affect fusion. See [3].
- Oliver et al [4] say "massive shrinkage and shape change occur during dehydration" cannot be reconciled with the (Bryant and Wolfe [3]) hypothesis.
Massive shrinkage and shape change are never denied by Bryant and Wolfe. On the contrary, they are assumed because they are central to the argument of that paper. See [3].
- Oliver et al [4] say "The polymers dextran and hydroxyethyl starch, on the other hand, had no effect at all on the dry DPPC Tm, although they had the highest Tg of the carbohydrates tested...... These results cannot be accounted for by the Bryant-Wolfe model" [3].
On the contrary, these results are simply accounted for by the Bryant-Wolfe model. See [3] and [5].
References
- [1] Crowe, J. H., Hoekstra, F. A., Nguyen, K. H., and Crowe, L. M. (1996). Is vitrification involved in depression of the phase transition temperature in dry phospholipids?. Biochimica et Biophysica Acta (BBA)-Biomembranes, 1280(2), 187-196.
- [2] Pincet, F., Perez, E., & Wolfe, J. (1994). "Do trehalose and dimethyl sulfoxide affect intermembrane forces?. Cryobiology, 31(6), 531-539.
- [3] Bryant, G. and Wolfe, J. (1992) "Interfacial Forces in Cryobiology and Anhydrobiology" Cryo-Letters 13, 23-36.
- [4] Oliver, A. E., Crowe, L. M., and Crowe, J. H. (1998). Methods for dehydration-tolerance: depression of the phase transition temperature in dry membranes and carbohydrate vitrification. Seed Science Research, 8(2), 211-221.
- [5] Bryant, G., K.L. Koster and J. Wolfe. (2001) Membrane behaviour in seeds and other systems at low water content: the various effects of solutes"" Seed Science Research, 11, 17-25.
We are unable to answer the question 'Why so much clear
misquotation?' Perhaps it is simply misunderstanding, or careless reading.
Despite repeated requests, only some of the misquotations have
been corrected in the literature, so we offer this page to correct any
misapprehensions that might arise from readings of these papers.
Other links
Cryobiology and Anhydrobiology.
Wolfe J. and Bryant, G. (1999) "Freezing, drying and/or vitrification of membrane-solute-water systems" Cryobiology, 39, 103-129.
Wolfe, J., Bryant, G. and Koster, K. (2002) "What is 'unfreezable water', how unfreezable is it and how much is there?" Cryoletters, 23, 157-166.
Wolfe, J. (2002) "Cellular Thermodynamics" Encyclopedia of Life Sciences (http://www.els.net). London: Nature Publishing Group.
Membranes: homeostasis and regulation of area and tension, and how this relates to survival of freeze-thaw cycles.
Joe Wolfe
/ J.Wolfe@unsw.edu.au
/61-2-9385 4954 (UT+10,+11 Oct-Mar)
Gary Bryant / Gary.Bryant@rmit.edu.au
/61-3-9925-2139 (UT+10,+11 Oct-Mar)
School of Physics
Snow gums in the Australian alps
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