Anal fibropapillomas containing bovine papillomavirus type 2 DNA in two groups of heifers     

JS Munday  AA Cullum  NA Thomson  M Bestbier  T McCormack  AF Julian 《New Zealand veterinary journal》2018,66(5):267-271

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Compression of Ice to 210 Gigapascals: Infrared Evidence for a Symmetric Hydrogen-Bonded Phase     

AF Goncharov  VV Struzhkin  MS Somayazulu  RJ Hemley  HK Mao 《Science (New York, N.Y.)》1996,273(5272):218-220

Protonated and deuterated ices (H2O and D2O) compressed to a maximum pressure of 210 gigapascals at 85 to 300 kelvin exhibit a phase transition at 60 gigapascals in H2O ice (70 gigapascals in D2O ice) on the basis of their infrared reflectance spectra determined with synchrotron radiation. The transition is characterized by soft-mode behavior of the nu3 O-H or O-D stretch below the transition, followed by a hardening (positive pressure shift) above it. This behavior is interpreted as the transformation of ice phase VII to a structure with symmetric hydrogen bonds. The spectroscopic features of the phase persisted to the maximum pressures (210 gigapascals) of the measurements, although changes in vibrational mode coupling were observed at 150 to 160 gigapascals.  相似文献