Chloride Content by Weight of Concrete. Q.: For corrosion protection, ACI 318-95, Building Code Requirements for Structural Concrete, specifies maximum water-soluble chloride ion in concrete as percent by weight of cement. What are acceptable levels when measuring chloride-ion content in existing concreteâspecifically, by weight of the concrete sample?
Plasma membranes are selectively permeable, regulating the cellâs molecular traffic. Hydrophobic (nonpolar) molecules, such as hydrocarbons, can dissolve in the lipid bilayer and. pass through the membrane rapidly. Polar molecules, such as sugars, do not cross the membrane easily. Transport Membranes Transport proteins allow passage of hydrophilic substances across the membrane.
tremendous or polar molecules do no longer relatively pass interior the process the membrane Small or Non-polar molecules relatively pass by using Molecules that don't pass by using contain: Ions (Na+) (ok+) - can no longer pass by using because of the fact of polarity Glucose and Sucrose - too tremendous and gentle polarity Proteins - extensive and don't pass by using, some are polar Molecules that should pass by using: Lipids- because of the fact of fact theyre Non-polar Water ...