化學(xué)與健康糖ppt課件-資料下載頁(yè)
2025-01-05 05:58本頁(yè)面
【正文】 r substitutes provide options for enjoying the sweet life 無(wú)熱量，是不能消化糖和節(jié)食者的糖的替代品。 ?Of the five sweeteners currently approved as food additives by most national health agencies(衛(wèi)生機(jī)構(gòu) ), saccharin and aspartame (糖精 ,天冬氨酰苯丙氨酸甲酯 ) have the longest history on the market and have received perhaps the most attention in the health and safety debate. 糖精（ saccharin） ?比蔗糖甜 300倍 ，如果含量超過(guò)% ，有苦味。不吸收 ?化學(xué)名稱：鄰苯甲?；酋啺? ?經(jīng)驗(yàn)式 : C7H4NNaO3S ?a Hopkins researcher accidentally spilled lab material on his hand, then noticed an unaccountable sweet taste while eating dinner that night. “科學(xué)的發(fā)現(xiàn)往往來(lái)自偶然 ” 天冬氨酰苯丙氨酸甲酯 (aspartame) ?天冬氨酰苯丙氨酸甲酯 (一種約比蔗糖甜 200倍的甜味劑 ) ?a chemist at G. D. Searle was researching treatments for gastric ulcers(胃潰瘍） in 1965 when he accidentally spilled aspartylphenylalanine methyl ester, simply called aspartame, on his hands. When he licked his fingers to pick up some paper, he noticed they tasted sweet. 天冬氨酰苯丙氨酸甲酯 （ aspartame） ?Aspartame is synthesized from spartic acid and phenylalanine苯基丙氨酸 . The body breaks down aspartame into these amino acids along with a small amount of methanol（甲醇） . Methanol is metabolized to formaldehyde（甲醛，防腐劑）and formic acid（甲酸 ). Formaldehyde is classified by the World Health Organization as a probable human carcinogen(致癌 ) and is the major source of controversy(論戰(zhàn) ) over aspartame39。s safety. 天冬氨酰苯丙氨酸甲酯不宜的人 ?people with the rare geic disorder phenylketonuria (PKU，苯丙酮酸尿癥 (一種先天性代謝異常 )) lack an enzyme for properly metabolizing phenylalanine, so they need to regulate their aspartame intake. In the ., all products containing aspartame must, by law, carry a warning for PKU patients. 問(wèn)答題 ?人體的六大營(yíng)養(yǎng)素與功用 ?“ 干紅 ” ， “ 干啤 ” 的 “ 干 ” 代表什么？ ?無(wú)糖饅頭含糖嗎？ ?去醫(yī)院看望患腸胃病病人，帶些水果好嗎？ ?烤地瓜在秋天吃和來(lái)年春天吃有什么不同 ,why？
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