(1) The compound eye of Musca exhibits characteristics which have heretofore frequently been considered evidence for color receptors: (a) The spectral sensitivity curve has several peaks whose relative heights can be altered by selective adaptation to colored lights, and (b) the shape of the retinal action potential varies with wave length. (2) The action spectrum for the red enhancement of on ...

The dihydroazulene/vinylheptafulvene (DHA/VHF) couple presents a photo-/thermo-switch that has attracted interest for the development of molecular solar thermal energy storage systems. Here we present synthesis and optical as well switching properties DHA derivatives incorporating alkyne norbornadiene (NBD) substituents at position C2. corresponding VHF isomers exhibited remarkably long lifetim...

Following the results we previously reported on a series of xanthene and xanthone derivatives as G-quadruplex stabilizing ligands, in order to obtain a more selective compound with respect to the previous generation of derivatives, we decided to modify the structure of the core ligand, specifically its aromatic extension. In particular, here we report the design, synthesis and activity data of ...

Dietary consumption of flavonoids (plant phytochemicals) may improve memory and neuro-cognitive performance, though the mechanism is poorly understood. Previous work has assessed cognitive effects in vertebrates; here we assess the suitability of Lymnaea stagnalis as an invertebrate model to elucidate the effects of flavonoids on cognition. (-)Epicatechin (epi) is a flavonoid present in cocoa, ...

Resilin is an elastomeric protein typically occurring in exoskeletons of arthropods. It is composed of randomly orientated coiled polypeptide chains that are covalently cross-linked together at regular intervals by the two unusual amino acids dityrosine and trityrosine forming a stable network with a high degree of flexibility and mobility. As a result of its molecular prerequisites, resilin fe...

A compact solid-state single-longitudinal-mode (SLM) Q-switched laser based on a compound cavity is demonstrated. SLM operation achieved through the enhancement of mode competition ( via manipulation effective reflectivity resonator mirrors and intracavity field accumulation time) does not require use feedback loop. In this work, emission with linewidth 254.3 MHz demonstrated, high ratio up to ...