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1、反式脂肪酸（Transfattyacids）Transfats(Trans,fats),alsoknownastransfattyacids,transfattyacids,oracidfatty(Trans),areunsaturatedfattyacids(monounsaturatedorpolyunsaturated).Animalmeatordairyproductscontainverylittlenaturaltransfats;iftheyarerepeatedlyfriedwithnaturalfa
2、t,asmallamountoftransfatisproduced.Thetransfatseatenbyhumansmainlycomefrompartiallyhydrogenatedvegetableoils."Hydrogenation"wasinventedintheearlytwentiethCenturyinthefoodindustrytechnology,andin1911bytheedibleoilbrand"Crisco"forthefirsttime.Thepartialhydrogenat
3、ionprocesschangesthemolecularstructureofthefat(whichmakestheoilmoreresistanttoheat,lessspoilage,andincreasesshelflife),butthehydrogenationprocessalsochangespartofthefattotransfats.Asaresultofaddingfood,crisptaste,easytolong-termpreservationandotheradvantages,th
4、iskindoffatiswidelyusedinthemarketofpackagedfood,restaurantsfriedfood.Becausetransfatsareclassifiedasunsaturatedfat,sothehealthhazardsbeforebeingfoundisregardedasthesubstitutionofsaturatedfatisinlinewiththereplacementofhealth,especiallybecauseofthewidespreadpub
5、licityoftheideaofhealthyeatingbutalsocontributedtotheamountoftransfat.Manyfastfoodchainsalsousetransfatsinsteadofoilsthatcontainsaturatedfattyacids.Transfatisstrictlyregulatedinafewcountries,andmanycountriesrequirefoodmanufacturersmustbemarkedontheproductdoesco
6、ntaintransfats,andtherearemanylegalcauseoftransfatscausedbytheongoing(mainlyforthefastfoodshopforlitigation).Manyfoodcompanieshavevoluntarilystoppedusingtransfatsintheirproducts,orincreasedthelineofproductsthatdonotcontaintransfats.Catalog[hidden]1History2chemi
7、calstructure3healtheffects4contentinfood5useinthefoodindustry6NutritionalBiochemistry7policynorms7.1EuropeandAmerica7.2Asia8foodindustryresponse9seealso10references11externallinks[Edit]historyThehydrogenationofedibleoilswasinventedbyGermanchemistWihaNormanandpa
8、tentedin1902.TherighttousethepatentoftheUnitedStatesin1909islocatedinCincinnatiinOhiointheUnitedStatesCincinnatiProcter&Gamble,andbegantopromotethefirstmanufacturingplantoil
