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International audience; The whole genome of Rhodococcus enclensis 23b-28, a bacterial strain isolated from cloud water, was sequenced. This microorganism is equipped with genes able to degrade aromatic compounds and could thus play a role in complex organic matter decomposition in cloud water.

The photochemical behaviour of rivastigmine has been investigated under UV-B irradiation by HPLC and NMR. Kinetic data have been obtained irradiating aqueous solutions (5 × 10 −5 M). For mechanistic purposes and products studies irradiation has also been carried out on concentrated solutions (1 × 10 −3 M) in water/acetonitrile, acetonitrile, methanol, methanol/acetonitrile, in the presence and absence of oxygen. Photoproducts, isolated by chromatographic processes, have been identified by spectroscopic means. Photochemical cleavage of the benzyl-nitrogen bond occurs and leads to radical-derived and, mainly, ion-derived products. Mechanistic pathways have been hypothesised on the basis of both steady-state irradiation and laser flash photolysis experiments.