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930908_30

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Image #   930908-30
Name:   Beta-carotene crystals
Copyright:   Copyright 1985 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Beta-carotene crystals. Carotenes are un-oxidized carotenoid pigments from the terpene group. They are orange colored pigments, important in photosynthesis. They do not actively contribute in photosynthesis, but instead they transmit the energy they absorb to chlorophyll pigments. Carotene is the dimer of vitamin A and comes in two forms α-carotene and β-carotene (alpha-carotene and beta-carotene). Both types can be stored in the liver, and unlike vitamin A, excess carotene is non-toxic and can also be converted to vitamin A as needed. Beta-carotene is a provitamin A carotenoid that is more efficiently converted to vitamin A / retinol than other carotenoids. Beta-carotene (vitamin A) is necessary for proper growth and repair of body tissues; helps maintain healthy skin; helps protect the mucous membranes of the mouth, nose, throat and lungs, thereby reducing susceptibility to infections; protects against air pollutants; counteracts night-blindness and weak eyesight; and aids in bone and teeth formation. Some carotenoids have been shown to function as antioxidants in laboratory studies.
Magnification*: x40
Type: LM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   930908-30 12.01.04 a-carotene alpha-carotene antioxidant anti-oxidant ▀-carotene beta-carotene bone formation carotene carotenes carotenoid carotenoids cell growth crystal crystals eyesight free radicals healthy skin human development human growth night blindness photosynthesis photosynthetic pigment provitamin A carotenoid retinol retinoic acid terpene tissue growth teeth formation Vitamin A LM

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