| antioxidant capacities of ten edible north american plants. | the etoac extract obtained from ten edible north american plants, acorus calamus, clintonia borealis, gaultheria shallon, juniperus osteosperma, opuntia polyacantha, prunus americana, prunus virginiana, sambucus cerulea, sorbus americana and vaccinium parvifolium, were tested in the 1,1-diphenyl-2-picrylhydrazyl (dpph) free radical assay. high antioxidant activity was obtained from the extracts of three fruits, gaultheria shallon, sambucus cerulea and prunus americana and one extracted rhizome, ... | 2002 | 11807968 |
| changes in foliar spectral reflectance and chlorophyll fluorescence of four temperate species following branch cutting. | spectral reflectance and chlorophyll fluorescence are rapid non-invasive methods that can be used to quantify plant stress. because variation in ambient light (e.g., diurnal patterns of solar radiation) may have a confounding effect on these measurements, branches are often excised in the field and then measured under controlled conditions in the laboratory. we studied four temperate tree species (abies balsamea (l.) mill. (balsam fir), betula papyrifera var. cordifolia (regel) fern. (paper birc ... | 2002 | 11986053 |