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alizarin green carbon tissue decomposable erosion index euphotic zone Germanophones hand-colourings imprejudice labilized hydrogen atom Libanotis lanzhouensis microbioassay NHE (normal hydrogen electrode) octal debugging technique r-carrying number railway motor coach renal spongioma roadman science project stress-relieving cavity u-state ustilago hordei (pers.)lagerh.