alkali resistant definition
Brush only. As with all solvent based paints (according to. British Standard BS 6150), do not use in. temperatures below 5°C. Dulux Trade Alkali Resisting Primer is a solvent-based primer particularly suitable for. use on interior and exterior masonry surfaces, including plaster, that may contain. alkalis. Allow fresh masonry surfaces to cure for at least 30 days before painting. If this is not possible, use a high-quality, alkali-resistant primer. Test alkalinity of the surface with phenolphthalein or a pH pencil. Paint with a high-quality water-based paint and avoid colors that are alkali-sensitive. Fetal Hemoglobin Test. Definition. Fetal hemoglobin (Hemoglobin F), Alkali-resistant hemoglobin, HBF (or Hb F), is the major hemoglobin component in the bloodstream of the fetus. After birth, it decreases rapidly until only traces are found in normal children and adults. Purpose. However, the term dealkalization may also be generally applied to any process where a glass surface forms a thin surface layer that is depleted of alkali ions relative to the bulk. Bundle of glass fibers. Glass fiber (or glass fibre) is a material consisting of numerous extremely fine fibers of glass. Glassmakers throughout history have experimented with glass fibers, but mass manufacture of glass fiber was only made possible with the invention of finer machine tooling. Dealkalization is a process of surface modification applicable to glasses containing alkali ions, wherein a thin surface layer is created that has a lower concentration of alkali ions than is present in the underlying, bulk glass. noun, plural alkalis, alkalies. 1. Chemistry. any of various bases, the hydroxides of the alkali metals and of ammonium, that neutralize acids to form salts and turn red litmus paper blue. any of various other more or less active bases, as calcium hydroxide. (not in technical use) an alkali metal. Definition. 1  Fetal hemoglobin (Hemoglobin F), Alkali-resistant hemoglobin, HBF (or Hb F), is the major hemoglobin component in the bloodstream of the fetus. After birth, it decreases rapidly until only traces are found in normal children and adults. Alkali-Resistant Materials. Alkali-Resistant Materials. materials capable of resisting the action of alkalies. The behavior of a material in alkalies depends on the material’s chemical composition, structure, and particle size, on the concentration and temperature of the alkali, and on the duration of the action of the alkali. A classic example of dealkalization is the treatment of glass containers, where a special process is used to create a dealkalized inside surface that is more resistant to interactions with liquid products put inside the container.
It is the major hemoglobin component in the bloodstream of the fetus.