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What causes Berloque dermatitis?

What causes Berloque dermatitis? Berloque dermatitis is caused by a phototoxic reaction that occurs when fragrance products containing bergamot oil or a psoralen are applied to the skin, followed by exposure to sunlight. What is the pathophysiology of atopic dermatitis? Read more…

Can helium be ionized?

Can helium be ionized? A helium (chemical element symbol He) atom that is missing one electron is called He II. Normal, neutral helium atoms that still have both electrons are called He I. Under conditions (temperatures around 60,000 to 80,000 Read more…