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
2024-08-19
5
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.
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 before drying. Plums for making prunes, and certain varieties of grapes for making raisins and currants, are dipped in an alkaline solution in order to crack the skins the fruit slightly and remove their wax coating, so increasing the rate of drying.
Nowadays most foods are dried mechanically. The conventional method of such dehydration is to put food in chambers through which hot hair 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, minced meat, and fish.
Liquids Such as milk, coffee, tea, soups and eggs may be dried by pouring them over a heated horizontal steel cylinder or by spraying them into a chamber through which a current of hot air passes. In the first case, the dried material is scraped off the roller as a thin film which is then broken up into small, though still relatively coarse flakes. In the second process it falls to the bottom of the chamber as a fine powder. Where recognizable pieces of meat and vegetables are required, as in soup, the ingredients are dried separately and then mixed.
Dried foods take up less room and weigh less than the same food packed in cans or frozen, and they do not need to be stored in special conditions. For these reasons they are invaluable to climbers, explorers and soldiers in battle, who have little storage space. They are also popular with housewives because it takes so little time to cook them. Usually it is just a case of replacing the dried-out moisture with boiling water. [br] Where are vegetables commonly dried nowadays?
选项
答案
In hot-air chambers.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3726187.html
相关试题推荐
Centuriesago,mandiscoveredthatremovingmoisturefromfoodhelpstopres
Centuriesago,mandiscoveredthatremovingmoisturefromfoodhelpstopres
Centuriesago,mandiscoveredthatremovingmoisturefromfoodhelpstopres
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Severalcenturiesago,whenEuropeanpeoplemarveledatthefinepotteryshi
Sofartherehavebeendiscoverednolimitstoman’scapacitytolearn.【76】F
Sofartherehavebeendiscoverednolimitstoman’scapacitytolearn.【76】F
Theschemewas______whenitwasdiscovereditwouldbeverycostly.A、resigned
随机试题
Asoccerreferee【B1】______forscoringagoalwhiletakingchargeforagame
[originaltext]M:HiTracy!Whatdoyouthinkofourclassonchildren’sliterat
IntroductionLinguisticshasbothpracticalandphilosophica
[originaltext](I=Interviewer;V=Victoria)I:Victoria,Iwonderthen,i
Thanksgivingisa(tradition)______festivalintheUSandCanada.traditional本题考
下列可作为核定建设项目交付资产的实际价值依据的是( )。A.工程项目竣工决算价
测定非特异性细胞免疫功能A.免疫印迹法B.细胞毒试验C.反向溶血空斑试验D.E花
下列指数中,属于个体指数的是()。A.海尔电冰箱的价格指数 B.衣着类价格指数
下列哪些病因导致的心衰不宜使用血管扩张剂进行.治疗? A.二尖瓣狭窄B..
(2018年真题)宜用水飞法进行炮制的中药是( )A.雄黄 B.芒硝 C.
最新回复
(
0
)