Quick bread leavening agents include a weak base, such as baking soda (sodium bicarbonate) plus a weak acid, such as cream of tartar, lemon juice, or cultured buttermilk, to create an acid–base reaction that releases carbon dioxide. (Quick bread leavened specifically with baking soda is often called "soda bread".) Baking powder contains both an acid and a base in dry powdered form, and simply needs a liquid medium in which to react. Other alternative leavening agents are egg whites mechanically beaten to form stiff peaks, as in the case of many waffle recipes, or steam, in the case of cream puffs. Nevertheless,
Irish traditional music session Irish traditional music session Irish traditional music sessions are mostly informal gatherings at which people play Irish traditional music. The Irish language word for "session" is "seisiún". This article discusses tune-playing, although "session" can also refer to a singing session or a mixed session (tunes and songs). Barry Foy's "Field Guide to the Irish Music Session" defines a session as: "...a gathering of Irish traditional musicians for the purpose of celebrating their common interest in the music by playing it together in a relaxed, informal setting, while in the process generally beefing up the mystical cultural mantra that hums along