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lactose    音标拼音: [l'æktos]
n. 乳糖

乳糖

lactose
n 1: a sugar comprising one glucose molecule linked to a
galactose molecule; occurs only in milk; "cow's milk
contains about 4.7% lactose" [synonym: {lactose}, {milk sugar}]

Galactose \Ga*lac"tose\, n. (Chem.)
A white, crystalline sugar, {C6H12O6}, isomeric with
dextrose, obtained by the decomposition of milk sugar, and
also from certain gums. When oxidized it forms mucic acid.
Called also {lactose} (though it is not lactose proper).
[1913 Webster]


lactose \lac"tose`\ (l[a^]k"t[=o]s`), n.
1. (Physiol. Chem.) The main sugar present in milk, called
also {sugar of milk} or {milk sugar}. When isolated pure
it is obtained crystalline; it is separable from the whey
by evaporation and crystallization. It is a disaccharide
with the formula {C12H22O11}, being chemically
4-([beta]-D-galactosido)-D-glucose. It has a slightly
sweet taste, is dextrorotary, and is much less soluble in
water than either cane sugar or glucose. Formerly called
{lactin}. When hydrolyzed it yields glucose and galactose.
In cells it may be hydrolyzed by the enzyme
[beta]-galactosidase.
[1913 Webster PJC]

2. (Chem.) See {Galactose}.
[1913 Webster]


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  • Lactose - Wikipedia
    Lactose is a disaccharide composed of galactose and glucose, which form a β-1→4 glycosidic linkage Its systematic name is β- D -galactopyranosyl- (1→4)- D -glucose
  • Lactose intolerance - Symptoms causes - Mayo Clinic
    Lactose intolerance is a condition that makes it hard to digest the sugar in milk and milk products, called lactose People with lactose intolerance often have diarrhea, gas and bloating after eating or drinking foods containing lactose
  • Lactose: Uses, Health Benefits, and Lactose Intolerance
    Lactose is white and odorless, and you may sometimes see or hear it referred to as "milk sugar " Lactose is only found in milk from mammals, so plant-based milk products like almond milk and soy milk don’t contain it The enzyme lactase helps the human body digest lactose
  • What Is Lactose? - Cleveland Clinic Health Essentials
    Lactose is a natural, complex sugar produced in all mammalian milk that’s difficult to breakdown unless you have lactase, a protein, in your small bowel
  • 5 Foods High in Lactose to Avoid - WebMD
    Lactose is a sugar naturally found in dairy products like milk, butter, yogurt, and more Learn which 5 foods to avoid for lactose intolerance
  • Lactose: Characteristics, Food and Drug-Related Applications, and Its . . .
    The positive and negative health-related effects of lactose are reported, focusing on the condition of lactose intolerance, for which an adequate lactose-free diet has to be followed to avoid symptoms that impairs quality of life
  • Are you suddenly lactose intolerant? This is why. - USA TODAY
    Lactose intolerance occurs when your body is unable to digest the sugar lactose, which is found in milk and milk products
  • 13 Cheeses You Can Eat If Youre Lactose-Intolerant - Real Simple
    Aged, hard cheeses have less sugar and lactose, making them easier to digest Lots of common softer, creamy cheeses also contain low levels of lactose Cheeses made from goat milk may be better tolerated than cow's milk, as goat milk contains less lactose to begin with
  • Lactose | Milk Sugar, Digestion Nutrition | Britannica
    Lactose, carbohydrate containing one molecule of glucose and one of galactose linked together Composing about 2 to 8 percent of the milk of all mammals, lactose is sometimes called milk sugar
  • Managing Lactose Intolerance
    Lactose is a sugar found in some dairy products Lactase is an enzyme in the gut that is needed to break down lactose Many adults have trouble digesting foods with lactose because their level of lactase goes down after childhood, which is normal





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