Expressions to obtain composition shifts due to capillarity are presented when the chemical potential shifts of the precipitate phase are taken into account. These are applied to calculate the precipitate coarsening kinetics in multicomponent systems, showing dependence on the solution thermodynamics followed by the continuous phase. 2002 Published by Elsevier Science Ltd. on behalf of Acta Mat...

The titration curves of the human hemoglobins AZ and F, the slow and fast components of horse hemoglobin, and bovine hemoglobin B have been analyzed, mainly to obtain information about the titration behavior of the histidines in these hemoglobins. The results were also compared with earlier data concerning human hemoglobin A and bovine hemoglobin A. In both hemoglobin As and F, 18 titratable hi...

When calcium and phosphate ions were mixed so that their final concentration was 4 mmol/1 and the pH was kept at 7-0, an amorphous precipitate immediately formed and this changed into crystalline material with an apatite-like structure after a period of time. The formation of either or both types of precipitate could be slowed down or prevented by adding to the crystallising medium trace amount...

Abstract Premature failures in metals can arise from the local reduction of fracture toughness when brittle phases precipitate. Precipitation be enhanced at grain and phase boundaries promoted by stress concentration causing a shift terminal solid solubility. This paper provides description model to predict stress-induced precipitation along interfaces one-phase two-phase metals. A phase-field ...

The 1,4-bis(3-guaiazulenylmethylium)benzene and 1,4-bis[1-(4,6,8-trimethylazulenylmethylium)]benzene dication salts were synthesized via an acid-catalyzed condensation/dehydration protocol with guaiazulene-terephthalaldehyde (2 : 1 ratio), and 4,6,8-trimethylazulene-terephthalaldehyde (2 : 1 ratio) respectively in one-pot processes. A similar condensation reaction with the parent azulene led to...

The occurrence of grain boundary precipitates was investigated with respect to the crystallographic orientation adjacent grains in extruded AA6110, AA6063 and AA6061 alloys brought T6 temper. It found that requirement for precipitate formation is have <100>Al directions or {100}Al planes parallel plane. highest density present when this fulfilled by both grains.

The results of these experiments are definite. There is, in the first place, a very striking difference with regard to precipitate formation between the acid and alkaline solutions of salvarsan when injected intravenously. Intravenous injections of alkaline solutions of salvarsan produce no precipitate in the blood, while injections of the acid solution nearly always give a precipitate. Further...