Mechanophores (MPs), stimuli-responsive molecules that respond chromatically to mechanochemical reactions, are important for understanding the coupling between mechanics and chemistry as well in engineering applications. However, atomic-level of their activation originates from gas phase studies or under simple linear elongation forces directly on polymer chains containing MPs. The effect many-...

Changes ot skin colour with temperature are remarkably consistent in reptiles; high temperatures cause paling of the skin while low temperatures induce darkening. The same rule generally applies to the Amphibia (Parker, 1948), although exceptions have frequently been noted. But in teleost fishes the responses are often ill-defined, unpredictable and even contradictory. There is a large literatu...

Non-visual photoreceptors with diverse photopigments allow organisms to adapt to changing light conditions. Whereas visual photoreceptors are involved in image formation, non-visual photoreceptors mainly undertake various non-image-forming tasks. They form specialised photosensory systems that measure the quality and quantity of light and enable appropriate behavioural and physiological respons...

A short proof is presented for a theorem of G. A. Dirac (1974) giving a lower bound for the number of edges of a k-critical graph on a given number of vertices and describing all non-complete k-critical graphs with minimum edge excess.

Abatwt-This paper reports tests of the hypothesis that a 200 msec 667 nm, fovea1 test Rash, presented upon a steady, 8” background, is detected by a pathway whose sensitivity is monotonically related to a Iinear functional of photoreceptor quantum catch. The measurement conditions used in this paper are the same as those used by Stiles in his n-mechanism analysis. The hypothesis is tested by me...