abstract the growth is a one of biological aspects of fishes and is a good index in order to determine of health of these population. the aim of this study was to investigate the effect of different color lights on condition factor and weight- length relationships (lwr) of rainbow trout. fertilized eggs of fish were kept under light conditions, 14h light and 10h dark for 5 months at seven light...

from bygone to now, colors are aspects of nature that have been regarded scientists. in ancient greece, essence of color and its relationship with light and vision in natural philosophy and especially optics has been studied. results of greek thinkers in the field chromatics, from pythagoras to aristotle through of translating scientific and philosophical texts, received to muslim scholars and ...

In this paper, we analyze period color and amplitude color relations at minimum, mean and maximum V band light for 6391 RRab stars in the Large Magellanic Cloud obtained by the MACHO project. Specifically, we find that color and amplitude are nearly independent of period at minimum light but that there exists a definite relation between period and color and amplitude and color at maximum light....