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大專食品英語ppt課件-文庫吧資料

2025-01-11 09:38本頁面
  

【正文】 that we need. These are the macronutrients ( carbohydrates, fats, proteins, and water) , which we need in relatively large amounts and the micronutrients ) mineral elements and vitamins) , which we need in relatively small amounts. All of the nutrients except for mineral elements and water are classified as anic chemicals because they contain the element carbon. Mineral elements and water are inanic chemicals because they do not contain carbon. ? The vitamins are divided into two general categorizes based on their solubility in either water or fat .the fatsoluble vitamins are vitamins A, D, E, and K; the watersoluble vitamins include vitamins C ( ascorbic acid) , niacin, thiamin, riboflavin, flacon ( also called folic acid) antithetic acid, pyridoxine, vitamin B12 and biotin. ? The mineral elements are divided into two categories based on the quantity of them that we need. Microelements are those needed in relatively large amounts, while microelements are those needed in very small amounts, some example of microelements are sodium , calcium , and phosphorus. Some example of microelements is iron, iodine, manganese, zinc, and fluorine. 營 養(yǎng) 素 ? 到目前為止,營養(yǎng)學(xué)家已確認(rèn) 40~ 45種物質(zhì)為必須營養(yǎng)素。 ? 營養(yǎng)學(xué)家的任務(wù)之一是解決營養(yǎng)素方面的問題,即營養(yǎng)素在人體內(nèi)的功能、每天營養(yǎng)素的人體需要量以及營養(yǎng)素?cái)z入過多或過少會(huì)產(chǎn)生什么樣的后果等等;二是解決有關(guān)食物和膳食方面的問題,即我們應(yīng)該吃什么,應(yīng)該吃多少。 ? 營養(yǎng)良好這一術(shù)語是指我們處在從食物中獲取為保持機(jī)體正常活動(dòng)和維持最佳健康狀況所需的全部營養(yǎng)素。 ? 由此可見,唯有營養(yǎng)素才是真正必需的,而正常提供營養(yǎng)素的則是食物。盡管如此,我們也可以不通過食物的攝入和消化而得到豐富的營養(yǎng)。這一過程理應(yīng)包括攝入和消化食物以及吸收和利用(即同化)其中所含的營養(yǎng)素。這是食物在人體內(nèi)的三種基本功能。我們稱這些營養(yǎng)素為必須營養(yǎng)素,因?yàn)闆]有它們我們就不能生存。那些具有營養(yǎng)功能的成分稱為營養(yǎng)素。食物由多種天然成分(全都是化學(xué)物質(zhì))組成。他們互相依賴,但不能互相替換。 ? 首先,我們要懂得一些常用營養(yǎng)學(xué)術(shù)語的定義,并找出一些準(zhǔn)則,以便幫助我們?nèi)ズ饬匡嬍车馁|(zhì)量和制定有益健康的飲食結(jié)構(gòu)。 ? 凡是渴望找到“應(yīng)該吃什么才會(huì)有良好的營養(yǎng)”這一問題答案的人也許很容易會(huì)墜入復(fù)雜的知識(shí)迷宮,很容易被科學(xué)家所提供的豐富技術(shù)信息所迷惑,也很容易被銷售商的簡(jiǎn)單化答案所誤導(dǎo)。Food Industry English 食品專業(yè)英語 2022年 7月乳品大專班面授 LESSON 1 Nutrition page 16 ? What we eat as well as how much we eat determine our nutrition status to an important extent, and influenced by a diversity of external and internal factors. ? The person who wants to fine the answer to the question what should I eat for good nutrition? “ , might easily bee lost in the maze of informational corridors , confused by the wealth of technical information provided by scientists or mislead by simplistic answers provided by those with products to sell. Somewhere in between is some reasonable, monsense information that we c
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