Publicou 6 edições por ano
ISSN Imprimir: 0018-8166
ISSN On-line: 1943-5991
Indexed in
Physical-chemical Interaction between Models of Cone-shaped Shells of Mollusks, and Moving Water
RESUMO
Cones of foil which simulated mollusk shells were covered with solidified plaster-polyvinylacetate (PVA) mixture. The loss of plaster from the surface of models under the action of seawater in the surf or hydrodynamical tube indicated an intensity of interchange of soluble substances of the shell and water. It was found in particular that physical-chemical interaction with water is slowed down when shells have ribbed surface; such an exchange is limited also in nonmoving, stagnant water, but living mollusks can change their body position that promotes the process. The solubility of plaster (simulating the natural exchange) decreased almost six fold as the velocity of water flow increased from 2 to 10−12 m/s.