title: Effect of processing conditions on the content of cis/trans carotene isomers as provitamin A carotenoids in Korean sweet potato varieties.
abstract: The present investigation intends to evaluate the changes in the content of cis/trans carotene isomers as provitamin A carotenoids by steaming and roasting processes in the roots of four Korean sweet potato varieties viz. Shinzami, Younwhangmi, Chuwhangmi and Jinhongmi using a liquid chromatography with diode array detection and the negative ion atmospheric pressure chemical ionization mass spectrometric (LC-DAD-APCI/MS) method and UV spectral pattern library created from several reference data. Except Shinzami, the content of all trans β-carotenes was found to slightly decreased or remained constant when steamed or roasted. The content of cis α-/β-carotenes was potentially increased about 2-fold or greater when raw or steamed and the content was slightly decreased while roasted. In Chuwhangmi, the content of 13-cis α-carotene and all trans α-carotenes were rapidly increased when steamed and slightly decreased when roasted. Chuwhangmi exhibited 27.2 mg/100 g DW content of all trans β-carotenes when roasted and thus, it was considered as a relatively superior cultivar.
authors.affiliation: Department of Agro-food Resources, National Academy of Agricultural Science, Rural Development Administration , Suwon , Republic of Korea and.
authors.forename: Heon Woong
authors.initials: HW
authors.lastname: Kim
authors.forename: Jung Bong
authors.initials: JB
authors.lastname: Kim
authors.forename: Shanmugavelan
authors.initials: S
authors.lastname: Poovan
authors.forename: Mi Nam
authors.initials: MN
authors.lastname: Chung
authors.forename: Soo Muk
authors.initials: SM
authors.lastname: Cho
authors.forename: Young Min
authors.initials: YM
authors.lastname: Lee
authors.forename: Young Sook
authors.initials: YS
authors.lastname: Cho
authors.forename: Jae Hyun
authors.initials: JH
authors.lastname: Kim
authors.forename: Haeng Ran
authors.initials: HR
authors.lastname: Kim
mesh_terms: D002338:Carotenoids / Q000737:chemistry* / Q000378:metabolism; D005511:Food Handling / Q000379:methods*; D027723:Ipomoea batatas / Q000737:chemistry* / Q000378:metabolism*; D015394:Molecular Structure; D056910:Republic of Korea
chemical_list: D002338:Carotenoids
keywords: Cis-trans isomers; Korean sweet potatoes; LC-DAD-APCI/MS; processed conditions; provitamin A carotenoids