SubstrateBroccoliCarrotCauliflowerCeleryCucumberLettuceOnionRadishItemg/kgas is43.729.634.251.643.1112.7124.983.9Drymatter18.89.613.526.118.072.449.948.5Ethanol insoluble residueTotal dietary fiber7.836.536.517.712.222.316.3residue!53.8Total dietary fiber?8.934.929.224.813.55.817.612.5g/kgdrymatter477292435405264357432378Total dietaryfiber residue196310234296309260341290Total dietary fiberNon-starch polysac217133charides3223176223174256209g/kg total dietaryffiberresidue871859888844847840847852Organic matter22259207801011145584Crude protein649800681764746726792768Total dietary fiberCell wall monomers (an-hydrous)19.225.184.361.494.239.114.412.4ArabinoseTR42.03.03.62.02.42.82.5Fucose39.324.147.3107.249.385.0149.423.0Galactose133.3164.2146.3179.5174.6161.8161.7181.6Glucose15.515.718.321.117.59.014.217.6MannoseTR1.8TRTR1.45.23.26.9Rhamnose7.923.121.436.424.520.921.316.4Xylose244.8181.2237.1238.7237.3275.1Uronic acids164.5164.616.315.613.710.212.917.413.415.5Acetyl49.524.324.243.246.276.622.641.8Klason lignin-1993,860NutrientMetabolism
Nutrient Metabolism， 1993， 860
ProblemIThe different sugars areusing the same chemicalstructure.COHCOHCH-OHCH·OHCH-OHCH.OHCH·OHCH·OH1CH,OHCO·OHCH2'OHGlucose orArabinosegalactoseand xylose
+ Problem I The different sugars are using the same chemical structure
十ProblemIISuccess of synthesisisextremelyscantOnly one from literature can stand “modern test”thesweetsyrup whichtheRussianchemistButlerovobtained4Oyearsagofromformaldehydebytheactionof limewater(Ca(OH)2:2H,O)acomplexmixtureand containsonlyatinyamountofa substance,closelyrelatedtogrape sugarglycerol
+ Problem II Only one from literature can stand“modern test”. the sweet syrup which the Russian chemist Butlerov obtained 40 years ago from formaldehyde by the action of lime water (Ca(OH)2·2H2O) a complex mixture and contains only a tiny amount of a substance, closely related to grape sugar glycerol. Success of synthesis is extremely scant
Relationship of glycerol and sugarCH2OHCHOdiluteHNO,COHHOH-OHH-1CH·OHCH2OHCH2OHCH.OHglyceroseCH·OH1CH2OHCH2ONO2CO·OHConcentrated HNO3HOHHONO2CH2-OHCH2OHCH2ONO2Glucose orgalactose
+ Relationship of glycerol and sugar