首页
登录
职称英语
Centuries ago, man discovered that removing moisture from food helps to pres
Centuries ago, man discovered that removing moisture from food helps to pres
游客
2023-07-27
36
管理
问题
Centuries ago, man discovered that removing moisture from food helps to preserve it, and that the easiest way to do this is to expose the food to sun and wind. In this way the North American Indians produce pemmican (dried meat ground into powder and made into cakes), the Scandinavians make stock fish and the Arabs dried dates (枣) and "apricot leather" (杏干).
Fruit is sun-dried in Asia Minor, Greece, Spain and other Mediterranean countries, and also in California, South Africa and Australia. The methods used vary, but in general, the fruit is spread out on trays in drying yards in the hot sun. In order to prevent darkening, pears, peaches and apricots are exposed to the fumes of burning sulphur (硫磺) before drying. Plums (李子), for making prunes (梅干), and certain varieties of grapes for making raisins (葡萄干) and small dried grape cakes, are dipped in a salt solution in order to crack the skins of the fruit slightly and remove their wax coating, thus increasing the rate of drying.
Nowadays most foods are dried mechanically. The conventional method of such dehydration (脱水) is to put food in chambers through which hot air is blown at temperatures of about 110℃ at entry to about 43℃ at exit. This is the usual method for drying such things as vegetables, cut meat, and fish.
Liquids such as milk, coffee, tea, soups and eggs may be dried by pouring them over a heated horizontal steel roller or by spraying them into a chamber through which a current of hot air passes. In the first case, the dried material is removed off the roller as a thin film which is then broken up into small, though still relatively coarse thin pieces. In the second process it falls to the bottom of the chamber as fine powder. Where recognizable pieces of meat and vegetables are added, as in soup, the ingredients are dried separately and then mixed. [br] What is the result of clipping plums or grapes in a salt solution before drying?____________
选项
答案
An increase in the rate of drying.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2874289.html
相关试题推荐
ThreecenturiesagotheFrenchmathematicianReneDescartespredictedthati
ThreecenturiesagotheFrenchmathematicianReneDescartespredictedthati
ThreecenturiesagotheFrenchmathematicianReneDescartespredictedthati
ThreecenturiesagotheFrenchmathematicianReneDescartespredictedthati
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
Forcenturiesmendreamedofachievingverticalflight.In400A.D.Chinese
Inthelatenineteenthandearlytwentiethcenturies,oneofthemostclearl
Inthelatenineteenthandearlytwentiethcenturies,oneofthemostclearl
Inthelatenineteenthandearlytwentiethcenturies,oneofthemostclearl
随机试题
_____isNOTapairofhomophones.A、Fair(lovely)and"fair"(aregulargathering
Everyoneofussaysthatsheisreally______(attract)althoughnotbeautiful.
A.holeB.utteringC.crackD.quietE.betraye
工程造价的(),决定了无论是投资者还是承包商都要对拟建工程进行预先测算。A.多变
大叶海藻的原植物是A.海蒿子 B.羊栖菜 C.马尾藻 D.蒿子
有一消防应急照明和疏散指示系统由配电箱、照明灯具、标志灯具和电源线等组件构成,该
费米悖论提出,银河系大约有2500亿(2.5×1011)颗恒星,可观测宇宙内则有
甲、乙、丙是某普通合伙企业的合伙人,以实物入伙的甲因车祸死亡,甲之子欲依继承关系
临床上输注新鲜冰冻血浆的主要目的是 A.扩充血容量 B.增强免疫力
下列各项属于应急保障措施内容的有()。A.治安维护 B.人员防护 C.医疗
最新回复
(
0
)