82 research outputs found
A morphometric method for correcting phytoplankton cell volume estimates
Cell volume calculations are often used to estimate biomass of natural phytoplankton assemblages. Such estimates may be questioned due to morphological differences in the organisms present. Morphometric analysis of 8 species representative of phytoplankton types found in the Great Lakes shows significant differences in cell constituent volumes. Volume of physiologically inert wall material ranges from nil, in some flagellates, to over 20% of the total cell volume in certain diatoms. Likewise, “empty” vacuole may comprise more than 40% of the total cell volume of some diatoms, but less than 3% of the volume of some flagellates. In the organisms investigated, the total carbon containing cytoplasm ranged from 52% to 98% of the total cell volume and the metabolizing biovolume ranged from 30% to 82%. Although these differences complicate direct biomass estimation, morphometric analysis at the ultrastructural level may provide ecologically valuable insights.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/41732/1/709_2005_Article_BF01275650.pd
Characterization of the deposition of collagen fibers and Lithogenic potential in bladder of rats submitted to a sugar cane biopolymer graft
Mudanças na vascularização arterial da curvatura menor do estômago após gastrectomia segmentar associada à vagotomia gástrica proximal em cães
Electron Microscopic Technique for Determining the Percent Crystallinity of Glass-Ceramic Materials
Comparison of liberation determinations by particle area percentage and exposed particle perimeter percentage in a flotation concentrator
QUANTITATIVE MICROSCOPIC DETERMINATION OF THE QUARTZ CONTENT OF COMMERCIAL GROUND FELDSPARS
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