Period 5 element dimethyl telluride, (CH)Te, a gas with a garlic-like odor which is exhaled in the breath of victims of tellurium toxicity or exposure. Iodine is the heaviest essential element utilized widely by life in biological functions (only tungsten, employed in enzymes by a few species of bacteria, is heavier). Iodine's rarity in many soils, due to initial low abundance as a crust-element, and also leaching of soluble iodide by rainwater, has led to many deficiency problems in land animals and inland human populations. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities. Iodine is
Roberto Goitre choirs, Carlo Pavese and Mario Pigazzini, still use the Cantar Leggendo method exclusively. Goitre dedicated all his life to musical pedagogy and choral music. It was indeed he who, at the start of the 1970s, founded the magazine La Cartellina, which is still today a very important magazine on choral music and musical pedagogy. The current editor of this magazine is Marco Boschini. Roberto Goitre Roberto Goitre (Turin, 1927 - Piacenza, 1980) was an Italian choirmaster, composer and teacher. Upon finishing his academic studies, Goitre devoted himself entirely to choral conducting. At the beginning of the 1960s, on invitation from