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The title of this lecture refers to Ramachandra’s paper in Acta Arithmetica [36], which will be our central subject: in section 1 we state his Main Theorem, in section 2 we apply it to algebraically additive functions. Next we give new consequences of Ramachandra’s results to density problems; for instance we discuss the following question: let E be an elliptic curve which is defined over the f...

The cosmic radiation incident at the top of the terrestrial atmosphere includes all stable charged particles and nuclei with lifetimes of order 106 years or longer. Technically, “primary” cosmic rays are those particles accelerated at astrophysical sources and “secondaries” are those particles produced in interaction of the primaries with interstellar gas. Thus electrons, protons and helium, as...

The incubation of erythrocyte ghosts with mixtures of vitamins A+D3, A+E, A+K1 produces decrease or increase of fluorescence anisotropy r of the DPH probe, depending on the vitamin/vitamin ratio. We found a correlation between the order parameter S and cell fusion phenomena observed by phase contrast microscopy.

Three side-chain analogues of cholecalciferol (vitamin D3) modified at C-25, namely 25-fluorocholecalciferol, 24-dehydrocholecalciferol and 25-dehydrocholecalciferol, conceived as potential inhibitors of the cholecalciferol 25-hydroxylase have been prepared and tested in the rat. These compounds markedly diminish conversion in vivo of cholecalciferol into 25-hydroxycholecalciferol, but are not ...

There is debate regarding the success or otherwise of community care. The evidence deriving from the closure of Friern Hospital on which the Team for the Assessment of Psychiatric Services project is based, discussed by Leff (2001), cannot be generalised because, in contrast to typical hospital closures, in the region of £100 million was allocated to ensure the ‘success’ of the project. Despite...

There is debate regarding the success or otherwise of community care. The evidence deriving from the closure of Friern Hospital on which the Team for the Assessment of Psychiatric Services project is based, discussed by Leff (2001), cannot be generalised because, in contrast to typical hospital closures, in the region of £100 million was allocated to ensure the ‘success’ of the project. Despite...