Well everyone, talking of early applications of cryocooling to X-ray
crystallography, what about Sten Samson's marvellous helium cryostat
which was operational at Caltech since the end of the 1970s and used to
reach temperatures around 20 K routinely ...., see for example:
Proc Natl Acad Sci U S A. 1982 Jul;79(13):4040-4.
Structure of a B-DNA dodecamer at 16 K.
Drew HR, Samson S, Dickerson RE.
That instrument (and its twin) are now both with Riccardo Destro in
Milano.
Ciao!
Pietro
--
Pietro Roversi
Sir William Dunn School of Pathology, Oxford University
South Parks Road, Oxford OX1 3RE, England UK
Tel. 0044-1865-275385
