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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
  • 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
  • Lactose intolerance - Symptoms and 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
  • 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
  • What Is Lactose and How Does Your Body Digest It?
    Lactose is a sugar found in dairy that your body breaks down with an enzyme Here’s how that process works and what happens when it doesn’t
  • What Is Lactose? - IFIC
    Lactose is sometimes referred to as “milk sugar” because it is only found naturally in the milk of mammals—including cows, goats and humans Milk from cows and goats is used to make cheese and yogurt, but not all milk products contain the same amount of lactose
  • Lactose intolerance - Wikipedia
    Although lactose may be detected in the faeces of people with lactose intolerance, this test is not considered reliable enough to conclusively diagnose or exclude lactose intolerance
  • Lactose - an overview | ScienceDirect Topics
    Lactose is a major disaccharide present in milk It is composed of two simple sugars, glucose and galactose Cow, goat, and buffalo milk contains less lactose than human milk It has several applications in the food industry
  • 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
  • Lactose: What is it and where is it used? - Drugs. com
    Lactose (C12H22O11) is milk sugar It is a disaccharide composed of one galactose and one glucose molecule In the pharmaceutical industry, lactose is used to help form tablets because it has excellent compressibility properties It is also used to form a diluent powder for dry-powder inhalations





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