• change
  • Because the normal excised cæca maintain a definite hydrogen ion concentration and change their internal environment toward that as an optimum during life, there exists a regulatory process which is an important vital function. (rupress.org)
  • values
  • The average values characteristic for the process were an ethanol concentration of 41.9 +/- 0.1 g1(-1), a fermentation efficiency of 82.9 +/- 2.1% and a volumetric productivity of 3.94 +/- 0.52 g1(-1) h-1. (biomedsearch.com)
  • activity
  • Influence of hydrogen-ion concentration upon enzymatic activity of three typical amylases. (wikipedia.org)
  • p H = − log 10 ⁡ ( a H + ) = log 10 ⁡ ( 1 a H + ) {\displaystyle \mathrm {pH} =-\log _{10}(a_{{\textrm {H}}^{+}})=\log _{10}\left({\frac {1}{a_{{\textrm {H}}^{+}}}}\right)} For example, a solution with a hydrogen ion activity of 5×10−6 = 1/(2×105) (at that level essentially the number of moles of hydrogen ions per liter of solution) has a pH of log10(2×105) = 5.3. (wikipedia.org)
  • Pt[clarification needed] Firstly, the cell is filled with a solution of known hydrogen ion activity and the emf, ES, is measured. (wikipedia.org)
  • upon
  • Drug release from HME tablets was dependent upon the concentration of TEC, the presence of citric acid, PVP K30, and Carbopol 971P in the matrix, and pH of the dissolution media. (biomedsearch.com)
  • Pressure
  • Increasing the concentration of TEC significantly lowered the glass transition temperature (Tg) of Eudragit L100-55 and reduced temperatures necessary for extrusion as well as the die pressure. (biomedsearch.com)
  • growth
  • RESULTS: Thirteen essential oils used in this study completely inhibited the growth of H. pylori in vitro at a concentration of 0.1% (v/v). Cymbopogon citratus (lemongrass) and Lippia citriodora (lemon verbena) were bactericidal against H. pylori at 0.01% at pH 4.0 and 5.0. (biomedsearch.com)