19 research outputs found
Ultracentrifugation and quasi-elastic light scattering experiments on polyadenilic acid solutions
No full textOur experimental results of quasi-elastic light scattering by solutions of polyadenilic acid are concentration dependent and show the simultaneous existence of two relaxation times (or large chains of polymers.
On analytical centrifugation, the solutions are found homogeneous and molecular weights are obtained from these experiments. The existence of slow mode seems to arise from interactions between chains but not from the existence of aggregates
√3 structure of Boron enriched Si(111) surfaces investigated by Auger, leed and scanning tunneling microscopy
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The Vicissitudes of a Scientific Institution: A Decade of Change at the Paris Observatory
No full textPrivate Tooth Decay as Public Economic Virtue: The Slave-Sugar Triangle, Consumerism, and European Industrialization
No full textStructural and phase transformations during initial stages of copper condensation on Si(001)
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