Immunology

Breast milk and babies' saliva shape oral microbiome

Newborn breastfed babies' saliva combines with breastmilk to release antibacterial compounds that help to shape the bacterial communities (microbiota) in babies' mouths, biomedical scientists have found.

Dentistry

50 shades whiter: What you should know about teeth whitening

The effect of teeth whitening was discovered quite by accident. In the past, dentists tried to treat gum disease with mouth rinses containing hydrogen peroxide. They noticed teeth became whiter over time following use of ...

Cancer

Cancer cells shown to co-opt DNA 'repair crew'

In experiments with human colon cancer cells and mice, a team led by scientists at the Johns Hopkins Kimmel Cancer Center say they have evidence that cancer arises when a normal part of cells' machinery generally used to ...

Cancer

Why high-dose vitamin C kills cancer cells

Vitamin C has a patchy history as a cancer therapy, but researchers at the University of Iowa believe that is because it has often been used in a way that guarantees failure.

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Hydrogen peroxide

Hydrogen peroxide (H2O2) is a very pale blue liquid, slightly more viscous than water, that appears colorless in dilute solution. It is a weak acid, has strong oxidizing properties, and is a powerful bleaching agent. It is used as a disinfectant, antiseptic, oxidizer, and in rocketry as a propellant. The oxidizing capacity of hydrogen peroxide is so strong that it is considered a highly reactive oxygen species.

In organisms, hydrogen peroxide is naturally produced as a byproduct of oxygen metabolism; virtually all possess enzymes known as peroxidases, which harmlessly and catalytically decompose low concentrations of hydrogen peroxide to water and oxygen.

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