释义 |
DictionarySeeskim milkEncyclopediaSeeSkim Milknonfat milk
skim milk Commercially produced milk with less than 1% (for some, less than 0.5%) fat content.milk (milk) A secretion of the mammary glands for the nourishment of the young.CompositionMilk from cows consists of water, organic substances, and mineral salts. Organic substances: Proteins: The principal proteins are caseinogen, lactoalbumin, and lactoglobulin; in the presence of calcium ions, soluble caseinogen is converted into insoluble casein by the action of acids, rennet, or pepsin. This brings about the curdling of milk. Lactoglobulin is identical with serum globulin of the blood and hence contains maternal antibodies. Carbohydrates: Lactose (milk sugar) is the principal sugar, although small quantities of other sugars are present. Fats: The principal fats are glycerides of oleic, palmitic, and myristic acids. Smaller quantities of stearic acid and short-chain fatty acids with carbon chains of C4 to C24 are present. Sterols and phosphatides (lecithin and cephalin) are also present. Churning causes the fat globules to unite into a solid mass and separate from the whey to form butter. Mineral salts: The principal cations are calcium, potassium, and sodium; the principal anions are phosphate and chloride. Citrates and lactates are present in small quantities. Milk is low in iron and magnesium. Vitamins: Vitamin A and those of the B complex (thiamine, riboflavin, and pantothenic acid) are present in adequate quantities to meet the needs of a growing child. Milk is low in vitamins C and D. Milk contains antibodies that are present in the mother's blood and a number of enzymes (catalase, oxidase, reductase, phosphatase). acidophilus milkMilk inoculated with Lactobacillus acidophilus, a bacterium that grows best in an acid medium. It is a probiotic food, used to modify the bacterial flora of the digestive tract. breast milkMilk obtained from the mammary glands of the human breast. It is the ideal source of nutrition for most infants, since it contains maternal antibodies that protect the child from infection, and other substances that promote development of the brain and the gastrointestinal tract, among other organs. Human breast milk that is collected and refrigerated immediately may be used for up to 5 days. If it is collected, frozen, and stored at -17.7°C (0°F), it is safe for 6 months. CAUTION!breast-feeding by mothers with human immunodeficiency virus (HIV) is not recommended, because of the risk of transmission of HIV to the child.butter milk See: buttermilk.casein milkMilk prepared with a large quantity of casein and fat but little sugar and salt, e.g., a product like whole fat milk .condensed milkMilk from which water has been removed and sugar has been added to make it thick and sweet. It is an ingredient in dessert recipes. cow's milkMilk obtained from cows.donor milkPasteurized donor breast milk.evaporated milkCow's milk that has been concentrated by evaporating some of the water. It can be canned after pasteurization and stored for long periods of time. See: lactic acid evaporated milkfermented milkAny cultured dairy product, such as buttermilk, cheese, kefir, koumiss, and yogurt. See: koumissfore milkMilk released at the beginning of each breast-feeding that contains a high percentage of water, protein, and vitamins but a lower percentage of fat than the hind milk that is released later.goat's milkMilk obtained from goats, which, like cow's milk, should be pasteurized before use. Goat's milk differs from cow's milk in that is has a higher fat content, and is deficient in folacin and vitamin B12. hind milkMilk released at the end of a breast-feeding, distinguished by its high fat content.homogenized milkMilk that has been processed in such a manner that fats are combined with the body of the milk and the cream does not separate.instant dry nonfat milkDried skimmed milk that may be stored at room temperature until needed and then reconstituted by adding water to the granules. It is often fortified with vitamins A and D. lactic acid evaporated milkEvaporated milk to which sugar and lactic acid have been added. To prepare this milk, add 17 oz (503 ml) of water to 13 oz (384 ml) of evaporated milk, 2 level tbsp (1 oz or 28 g) of granulated sugar, and 3 tbsp (45 ml) of vinegar. low-fat milk 1%Cow's milk with 1% fat, which represents 22% of the calories.low-fat milk 2%Cow's milk with 2% fat, which represents 35% of the calories.mature milkMilk released once lactation has become fully established. See: fore milk; hind milkmodified milkCow's milk altered so that its composition more closely approximates that of human milk.mother's milkBreast milk.nonfat milkSkim milk.pasteurized milkMilk heated to a specified temperature for a precise length of time and then cooled rapidly. This process kills pathogenic bacteria without appreciably altering the taste of the milk. See: pasteurizationpasteurized donor breast milk Abbreviation: PDBM Milk that has been produced by a woman for use by another woman and her newborn infant, when the infant's mother does not make adequate milk to nourish her child. Synonym: donor milk; pasteurized donor human milkpasteurized donor human milkPasteurized donor breast milk.protein milkMilk modified to be high in protein and low in carbohydrate and fat content.red milkMilk contaminated by blood, chromogenic bacteria, or plant pigments.ropy milkMilk that has become viscid as a result of the presence of exopolysaccharides produced by bacterial contamination.skim milkCow's milk from which the fat has been removed.sour milkMilk with lactic acid caused either by lactic acid–producing bacteria or by the addition of vinegar. It is most commonly used in baked goods. soy milkA beverage derived from soybeans. It can take the place of cow's milk in people who have lactose intolerance and those who are allergic to milk proteins. sterilized milkMilk that has been boiled to kill bacteria.transitional milkThe first breast milk produced as colostrum production fades. It has more triglyceride and medium-chain fatty acid content than colostrum. Its other components include lactose, water-soluble vitamins, and immunoglobulins. vegetable milk1. The latex of plants.2. A beverage prepared from juices of various plants, such as soybean.vitamin D milkMilk in which vitamin D content has been increased by addition of concentrates, ultraviolet irradiation, or feeding of irradiated yeast to milk-producing animals.whole milkMilk whose fat content is unaltered. It is homogenized, pasteurized, and often fortified with vitamins A and D. It may in some instances be treated with lactase-destroying enzymes. See: pasteurization.witch's milk1. Milk secreted by the newly born infant's breast, stimulated by the lactating hormone circulating in the mother.2. A rarely used synonym for galactorrhea. |