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  2. Carbon snake - Wikipedia

    en.wikipedia.org/wiki/Carbon_snake

    The expansion of the mixture is the result of vaporization of water and CO 2 inside the container. The gases inflate the mixture to form a snake-like shape, and give off a burned sugar smell. [ 1 ] The granularity of the sugar can greatly affect the reaction: powdered sugar reacts very quickly but sugar cubes take longer to react.

  3. Carbohydrate - Wikipedia

    en.wikipedia.org/wiki/Carbohydrate

    Lactose is a disaccharide found in animal milk. It consists of a molecule of D-galactose and a molecule of D-glucose bonded by beta-1-4 glycosidic linkage.. A carbohydrate (/ ˌ k ɑːr b oʊ ˈ h aɪ d r eɪ t /) is a biomolecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen–oxygen atom ratio of 2:1 (as in water) and thus with the empirical formula C m ...

  4. Food pyramid (nutrition) - Wikipedia

    en.wikipedia.org/wiki/Food_pyramid_(nutrition)

    The structure is similar in some respects to the USDA food pyramid, but there are clear distinctions between types of fats, and a more dramatic distinction where carbohydrates are categorized on the basis of free sugars versus sugars in their natural form. Some food substances are singled out due to the impact on the target issues that the ...

  5. Human nutrition - Wikipedia

    en.wikipedia.org/wiki/Human_nutrition

    The Recommended Dietary Allowance (RDA) for vitamin B12 is 0.9-2.4 μg/day, while the estimated average requirement in the U.S. and Canada is 0.7-2 μg/day. Elderly individuals with plasma vitamin B12 levels below 148 pmol/L are considered severely deficient, and those with levels between 148 and 221 pmol/L are marginally deficient.

  6. List of macronutrients - Wikipedia

    en.wikipedia.org/wiki/List_of_macronutrients

    Fat has a food energy content of 38 kilojoules per gram (9 kilocalories per gram) proteins and carbohydrates 17 kJ/g (4 kcal/g). [2] Water makes up a large proportion of the total mass ingested as part of a normal diet but it does not provide any nutritional value.

  7. Carbohydrate metabolism - Wikipedia

    en.wikipedia.org/wiki/Carbohydrate_metabolism

    Carbohydrate metabolism is the whole of the biochemical processes responsible for the metabolic formation, breakdown, and interconversion of carbohydrates in living organisms. Carbohydrates are central to many essential metabolic pathways . [ 1 ]

  8. Carbohydrase - Wikipedia

    en.wikipedia.org/wiki/Carbohydrase

    Carbohydrase is the name of a set of enzymes that catalyze five types of reactions, turning carbohydrates into simple sugars, from the large family of glycosidases. [1] Carbohydrases are produced in the pancreas, salivary glands and small intestine, breaking down polysaccharides.

  9. Human digestive system - Wikipedia

    en.wikipedia.org/wiki/Human_digestive_system

    In the large intestine, [2] the passage of the digesting food in the colon is a lot slower, taking from 30 to 40 hours until it is removed by defecation. [31] The colon mainly serves as a site for the fermentation of digestible matter by the gut flora. The time taken varies considerably between individuals.

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