High temperatures required for reaction between components can result in loss of volatile oxides, while milling may not comminute powders sufficiently for complete reaction to occur on calcination.

Stop playing games with me and tell me the truth.

Bossa nova, the quietly revolutionary Brazilian music that João Gilberto introduced 50 years ago, quickly became associated with the sunswept beaches and sweeping mountain vistas of Rio de Janeiro in songs like “Garota de Ipanema” (“The Girl From Ipanema”) and “Corcovado.”

Maybe they will pass a bill requiring an investigation into just how much black top and concrete is used in the transportation system.