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Image #   27868D
Name:   Xanthan gum
Copyright:   Copyright 2008 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Xanthan gum - polysaccharide produced by the bacterium Xanthomonas campestris. Xanthan gum, also known as guar gum, is produced by the bacterium in a process involving fermentation of glucose or sucrose. The polysaccharide is secreted in to the growth medium by the bacterium and it is then harvested by precipitation with isopropyl alcohol. It is then dried and milled to a powder form that is readily soluble. It is an accepted food additive in many countries. Xanthan gum has the capacity to produce a large increase in the viscosity of a liquid. Unlike other gums, it is very stable under a wide range of temperatures and pH. In foods, xanthan gum is most often found in salad dressings and sauces. It helps to stabilize the colloidal oil and solid components against creaming by acting as an emulsifier. Also used in frozen foods and beverages, xanthum gum creates the pleasant texture in many ice creams. Toothpaste often contains xanthum gum, where it serves as a binder to keep the product uniform. Xanthan gum is also used in gluten-free baking. In the oil industry, xanthan gum is used in large quantities, usually to thicken drilling fluids.
Magnification*: x160
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   02.01.08 27868D bacterium bacteria Xanthomomas compestris guar gum emulsifier bacteria polysaccharide polysaccharide bacteria fermentation bacterial fermentation food additive binder fermentation viscosity solution viscosity salad dressing ice cream cosmetic cosmetics cosmetic emulsion food component gluten-free gluten-free baking thickening agent food emulsifier SEM food sauce food sauces toothpaste food binder xanthan gum

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