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phosphotungstic acid การใช้

ประโยคมือถือ
  • There is much more phosphotungstic acid in the solution than hematein.
  • Phosphotungstic acid negative stained sample viewed with transmission electron microscopy technique.
  • Phosphotungstic acid is less sensitive to reduction than phosphomolybdic acid.
  • Phosphotungstic acid is electron dense, opaque for electrons.
  • Phosphotungstic acid solutions decompose as the pH is increased.
  • The role of phosphotungstic acid and the mechanism of staining is not fully understood.
  • The phosphotungstic acid binds all of the available hematein to form a blue lake pigment.
  • Phosphotungstic acid is the strongest of heteropolyacids.
  • Phosphotungstic acid forms a lake with haematin.
  • The rest of the phosphotungstic acid stains the red-brown components, such as collagen.
  • It stains some tissue in contrasting colors in a way similar to haematoxylin and eosin stain, as phosphotungstic acid binds to tissue proteins.
  • Oxygen forms heteropoly acids and polyoxometalate ions with tungsten, molybdenum and some other transition metals, such as phosphotungstic acid ( ) and octadecamolybdophosphoric acid ( ).
  • The inclusion of a different atom such as phosphorus in place of the two central hydrogens in metatungstate produces a wide variety of heteropoly acids, such as phosphotungstic acid H 3 PW 12 O 40.
  • The EA stain contains two mutually incompatible chemicals, Bismarck brown and phosphotungstic acid, which precipitate each other, impairing the useful life of the mixture and compromising the differential staining of eosin and light green.
  • Heteropolyacids have long been used in analysis and histology and are a component of many reagents e . g . the Folin-Ciocalteu reagent, folins phenol reagent used in the Lowry protein assay and EPTA, ethanolic phosphotungstic acid.
  • Phosphotungstic acid is used in histology as a component for staining of cell specimens, often together with haematoxylin as PTAH . It binds to fibrin, collagen, and fibres of connective tissues, and replaces the anions of dyes from these materials, selectively decoloring them.