Lost and Found Sound:

Effect of Gasification Char and Recycled Carbon Fibres on the Electrical Impedance of Concrete Exposed to Accelerated Degradation

“…In this case, all the tested carbon-based additions seem to make concrete more resistant to chloride penetration, something which is different to when chlorides penetrate from the contact with a chloride-rich solution. This is due to the different penetration mechanisms of chlorides: in the salt-spray chamber chlorides move by diffusion generated by a concentration gradient, whereas in chloride penetration test chlorides move by capillary water absorption generated by the chloriderich solution capillary pressure [59]. In this case, as expected, chlorides penetrate much less by concentration gradient than by the capillary pressure of the chloride-rich solution.…”

Revolutions in Chemistry: Assessment of Six 20th Century Candidates (The Instrumental Revolution; Hückel Molecular Orbital Theory; Hückel’s 4n + 2 Rule; the Woodward–Hoffmann Rules; Quantum Chemistry; and Retrosynthetic Analysis)

“…While I have not performed research on this aspect of pedagogy, I can offer what I have heard over many years, including from Brian Coppola, a scholar for many years active in improving pedagogy in chemistry . “Too much to teach, not enough time.” “Insufficient resources.” “I don’t have that expertise beyond an anecdotal tale or two.” “I am uncertain as to how to integrate history of chemistry into instruction so as to improve understanding.” “Few students will sign up for a course taught by a historian of science.” “Students are focused primarily on grades, not on learning.” I will add that several recent textbooks in organic chemistry have included history of chemistry as a minor yet noticeable feature in their text. , …”