* Estrada Nacional 13 (km 6), Apartado 1008, 4471-909 Maia, Portugal. † LEPAE—Departamento de Engenharia Química, Faculdade de Engenharia, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal. ** Author to whom correspondence should be addressed: +351 22 508 1695, Fax: +351 22 508 1449, email: [email protected]. An apparatus for determining the permeability of paint films towards chloride ion is descr...

The present study aimed at assessing mechanical and durability characteristics of ground granulated blast furnace slag (GGBS)-based geopolymer composites 5%, 10%, 15%, 20%, 25%, 30% replacement proportion silica fume 12 molarity NaOH. Mechanical properties were assessed using compression tension tests, whereas evaluated ultrasonic pulse velocity test (UPV), acid test, rapid chloride permeabilit...

The effective use of construction waste is great significance to the a sustainable society. This study investigated permeability recycled aggregate concrete with different qualities. aggregates were treated crystallizing agent. improvement effect crystallization was evaluated by rapid chloride ion migration test and electron microscope observation. results show that calcium silicate hydrate gen...

The relative permeability sequences of the rat connexin 43 (rCx43) gap junction channel to seven cations and chloride were examined by double whole cell patch clamp recording of single gap junction channel currents in rCx43 transfected neuroblastoma 2A (N2A) cell pairs. The measured maximal single channel slope conductances (gammaj, in pS) of the junctional current-voltage relationships in 115 ...

Vasoactive intestinal polypeptide (VIP) and the calcium ionophore A23187 caused dose-dependent changes in the potential difference and the short circuit current (Isc) across confluent T84 cell monolayers mounted in modified Ussing chambers. Both VIP and A23187 stimulated net chloride secretion without altering sodium transport. Net chloride secretion accounted for the increase in Isc. When A231...

The influence of a chloride-ion adsorption agent (Cl agent in short), composed of zeolite, calcium aluminate hydrate and calcium nitrite, on the ingress of chloride ions into concrete and mortar has been experimentally studied. The permeability of concrete was measured, and the chloride ion content in mortar was tested. The experimental results reveal that the Cl agent could adsorb chloride ion...

Organotin cations (R3Sn+) form electrically neutral ion pairs with monovalent anions. It is demonstrated that the tin derivatives induce exchange diffusion of chloride in red cells and resealed ghosts, without any detectable increase of membrane permeability to net movements of chloride ions. The obligatory anion exchange is believed to be due to the permeation of electroneural ion pairs, where...