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Silicon dioxide Wikipedia

Silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula Si O 2, most commonly found in nature as quartz and in ...

Libro Wikipedia, la enciclopedia libre

Un libro (del latín liber, libri) es una obra impresa, manuscrita o pintada en una serie de hojas de papel, pergamino, vitela u otro material, unidas por un lado (es ...

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Environmental Health Criteria (EHC) on inorganic lead …

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Copper (EHC 200, 1998)

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Lead poisoning Wikipedia

Lead poisoning is a type of metal poisoning caused by lead in the body. The brain is the most sensitive. Symptoms may include abdominal pain, constipation, headaches ...

Cinnabar: Cinnabar mineral information and data. …

Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.

Quartz: Quartz mineral information and data.

Quartz is one of the most common minerals found in the Earth's crust. If pure, quartz forms colorless, transparent and very hard crystals with a glasslike luster. A ...

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Chapter 10 Respiratory System STRUCTURE AND FUNCTION. Morton Lippmann. The respiratory system extends from the breathing zone just outside of …