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lactose    音標拼音: [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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英文字典中文字典相關資料:
  • 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
  • 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 – Cause, Symptoms, Diagnosis, Treatment
    Lactose is the sugar that’s in milk Our bodies use an enzyme called lactase to break down that sugar so we can absorb it into our bodies But people with lactose intolerance don’t have enough
  • 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
  • Lactose-Free Diet: Foods to Eat and Avoid - Healthline
    Lactose is a simple sugar in milk that many people have trouble digesting This article takes a closer look at which foods you should eat and avoid as part of a lactose-free diet
  • 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 intolerance - Wikipedia
    The digestive system is unable to process the lactose sugar, and the unprocessed sugars in the gut produce the symptoms of lactose intolerance Lactose intolerance is not an allergy, because it is not an immune response, but rather a sensitivity to dairy caused by a deficiency of lactase enzyme
  • Lactose intolerance - Diagnosis treatment - Mayo Clinic
    Ice cream and milk contain the most lactose, but the high fat content in ice cream might allow you to eat it without symptoms You might tolerate cultured milk products such as yogurt because the bacteria used in the culturing process naturally produce the enzyme that breaks down lactose
  • 6 Ways To Relieve Lactose Intolerance Symptoms
    Choose reduced-lactose or lactose-free dairy products Try lactose-free milk alternatives, like oat milk or almond milk Improve your gut health with prebiotics and probiotics





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