Vitamin C and citric acid crystals, LM

Vitamin C and citric acid crystals, LM

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Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Light micrograph (LM) of Vitamin C (ascorbic acid) and citric acid crystals. Ascorbic acid is an organic acid found in citrus fruits and an antioxidant also known as vitamin C. Primates (including humans) and a few other species, such as the guinea pig, cannot synthesize vitamin C from glucose, resulting in the deficiency called scurvy. Ascorbic acid is a natural preservative. Citric acid is a weak organic acid found in citrus fruits. It is a natural preservative and is also used to add an acidic (sour) taste to foods and soft drinks. In biochemistry, it is important as an intermediate compound in the citric acid cycle and therefore occurs in the metabolism of almost all living things. It also serves as an environmentally friendly cleaning agent and acts as an antioxidant. Magnification: x40 when shortest axis printed at 25 millimetres.

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Keywords: 860523-07, acid, agent, antioxidant, ascorbic, c, citric, cleaning, colored, coloured, crystal, crystals, cycle, false-colored, false-coloured, light, lm, metabolism, micrograph, natural, organic, preservative, scurvy, vitamin

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