【英语翻译Solvent-extractedoleoresinsexhibitaflavourprofileclosetothefreshlygroundspice,whichmakethemanacceptableformofnaturalflavouringingredientinawidespectrumoffoodapplications.Incomparisontothegroundspices,theyareh】
英语翻译
Solvent-extractedoleoresinsexhibitaflavourprofile
closetothefreshlygroundspice,whichmaketheman
acceptableformofnaturalflavouringingredientina
widespectrumoffoodapplications.Incomparisonto
thegroundspices,theyarehygienicandcanbestandardized
foracceptableflavourlevelsbyblending.Unlike
theessentialoils,oleoresinscontainnatural
antioxidantsofthecorrespondingspices,whichmake
themmorestable.Oleoresinsarequiteconcentrated
andhavegoodreplacementvalue.Theyprovideabetter
distributioninthefinishedproductsandrequireless
storagespacethanthecorrespondingspices.However,
spiceoleoresinsexhibitsensitivitytolight,heatandoxygen,
andhaveshortstoragelivesifnotstoredproperly.
Inblackpepperoleoresin,poorstoragelifeisaresultof
oxidativeandpolymericchangesinvolvingthefattyoil
componentandmonoterpinichydrocarbons(e.g.,
a-pinene,b-pinene,limonene,sabineneandD3-carene).
Somechemicalandorganolepticchangescanalsooccur
intheoleoresinduringprolongedstorage.Destruction
ofseveralpigmentsoccursunderexposuretooxygen
whereinthehydroxylicgroupsareconvertedintounstable
ketones.Theseinturndecomposeintocolourless
compoundswithashortercarbonskeleton(Gilbertson,
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