资源描述:
《java 网络程序设计.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、LiuBoInterestingChemistryinCookingYousautevegetablesarelikeAorB?ABThegreencolorcomefromchlorophyll.Chlorophylliswidelyexistsinallkindsofplantleaves.Chlorophyllissensitivetolight,heat,acidandalkali.Iteasilyberuinedduringanyprocessingandstorageprocess.Thechemicalstructureofchlo
2、rophyllThechlorophyllcontentsaprphyrinringheadandahydrocarbontail.AndaMagnesiumatomsinthecenteroftheporphyrinring.TheMgatomscanbereplacedwithH+,cu+andsoon.Ifthegreenvegetableswastratedwithacid,theMgatomwouldbereplacedbyhydrogenion.Thenthechorophyllistransfomedintopheophytin,t
3、heleavesbecometoyelloworbrown,asthepheophytin’scolorisbrown.Chlorophyll英[‘klɔːrəfɪl]叶绿素Porphyrin英[‘pɔːfɪrɪn]卟啉Cupricion英[‘kjuːprɪk]铜离子Whytheleavesaresogreen?Thevegetablesitselfproducessomeacidduringstorage,whichcouldmakethechlorophyllconventintopheophytin,andthencausedtheleav
4、esturnyelloworbrown.Vegetablewouldlostgreencolorafteritwaspickled,becauselacticacidwasproducedduringtheprocessofpickleSomevegetablescontentalotofoxalicacid,ifyoucoverthepotduringcookingthatwouldleadtothevegetableslostgreen,becausetheoxalicacidcan’tescape/runaway.Sopleasedon’t
5、addvinegarorcoverpotwhenyousautegreenvegetablesunlessyouaddalittlesodaatthesametime.Whatneedremindis,ifdosageofthesodaistoomuch,thatwouldruinthevitaminCinvegetables.Saute[soʊˈteɪ]炒炒的Oxalicacid[ɑk‘sælɪk]草酸HowtokeepgreenduringsautevegetablesWhereisthedelicateflavorscomefromTher
6、easonwhydeliciousofallsortsofdelicaciesiswhichcontentdelicatesubstance.Mostofthesubstanceisaminoacid.Thefirstly最早被提取出来并广泛食用的鲜味物质是味精,它是由日本东京帝国大学的一位教授从海带中发现的,主要成分是谷氨酸aginomoto味精MonosodiumGlutamate(MSG):谷氨酸一钠。食用味精是怎么来的?Theedibleaginomotoalmostcomefromgrainsuchaswheat,cornandsoon
7、.inthepast,flourbeusedasrawmaterialstoproduceaginomoto.Theprotein-richglutenwashydrolyzedwithhydrochloricacid,andneutralizedwithsodiumhydroxidetoaffordMonosodiumGlutamate现在的主要方法是用玉米或白薯淀粉为原料,水解为葡萄糖后,发酵生成谷氨酸铵,再经离子交换、中和得到谷氨酸一钠,用这种方法收率更高。Howtousetheaginomotowillbebatter?Addalittl
8、esalt.SaltcouldimprovethedelicateflavorDelicateflavorofaginomotoRela