Background: The optimum maturity duration for maximum grain yield of non-photosensitive rice (Oryza sativa) under direct-seeded condition in the tropics was studied. Information on such studies conducted using near-isogenic lines are lacking. Change with explained components. Methods: experiment dry zone Sri Lanka over two seasons namely and wet during 2021 2022. Non-photosensitive that varying...

Retinal extracts have been prepared from dark-adapted mudsuckers by treatment of retinal tissue or of isolated outer segments of the visual cells with digitonin solution. The extracts were examined spectrophotometrically and found to absorb light maximally between the wave lengths of 488 and 510 mmicro, depending on the proportion of yellow impurities and light-sensitive pigment present. This p...