Biological Activity of Novel Organotin Compounds with a Schiff Base Containing an Antioxidant Fragment.

A series of novel organotin(IV) complexes on the base of 2-(N-3',5'-di--butyl-4'-hydroxyphenyl)-iminomethylphenol () of formulae MeSnBr(L) (), BuSnCl(L)(), PhSnCl(L) (), PhSnCl(L) () PhSnBr(L) () were synthesized and characterized by H, C, Sn NMR, IR, ESI-MS and elemental analysis. The crystal structures of initial and complex were determined by XRD method. It was found that crystallizes in the orthorhombic syngony.

Features of the Territorial Distribution, Composition and Structure of Phytocenoses with the Participation of , Their Resource Qualities, Ecological and Economic Importance (Southeastern Part of the East European Plain).

At present, the distribution area of L. in the forest ecosystems of the Volga Region is rather low and ranges from 0.01% to 2.

The Colours of Octopus: Using Spectral Data to Measure Octopus Camouflage.

No animal can so effectively camouflage in such a wide range of environments as the octopus. Thanks to their highly malleable skin, they are capable of adapting their body patterns to the brightness and texture of their immediate environment, and they often seemingly match the colour of background objects. However, octopuses are colour-blind as their eyes have only one type of visual pigment.

Selected ocular dimensions of three penguin species.

Penguins (Spheniscidae) are a diverse clade of flightless, marine birds. Their eyes, likely a primary driver of behaviour, have been noted to have anatomic adaptations to their amphibious lifestyle. In particular, they have a relatively flat cornea, which would make the transition from a subaerial to a submarine environment require less accommodative effort.

The role of colour patterns for the recognition of flowers by bees.

Bees discriminate between many different colours of flower petals, but it is not well understood how they perceive and learn patterns frequently found in flowers with colourful structures. We used multi-spectral imaging to explore chromatic cues in concentric flower patterns as they are seen through the low-resolution eyes of the honeybee. We find a diversity of colour combinations, which suggests that plants might exploit the sensory capabilities of pollinators, like bees, that learn colours easily.