But osteopenia is not characterized by a significant decrease in the concentration of calcium in the bones, for this reason, the pathology in the picture is not found.
Mas osteopenia não é caracterizada por uma diminuição significativa na concentração de cálcio nos ossos, por esse motivo, a patologia na imagem não é encontrada. Osteopenia da coluna lombar
In the early 1980s, scientists observed a significant decrease in the concentration of ozone in the stratosphere over the Antarctic, which became widely known as the "ozone hole".
No início da década de 1980, os cientistas observaram um decréscimo importante da concentração de ozono na estratosfera sobre o Antárctico, o qual se tornou conhecido em geral como "buraco do ozono".
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