il nero equivale allassenza di luce e quindi alla mancanza di colore (valore 0); dallinfrarosso allultravioletto ci sono le frequenze di colore crescenti da 1 a 7: marrone, rosso, arancio, giallo, verde, blu e viola; il grigio (valore 8) pu essere ricorda

This is a fact sheet intended for health professionals. For a reader-friendly overview of Selenium, see our consumer fact sheet on Selenium.. Introduction. Selenium is a trace element that is naturally present in many foods, added to others, and available

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