Fresh coriander leaves were steam- and water-blanched at 100 C and at 90 and 100 C, respectively, for
1–10 min, and subsequently comminuted to form a paste. Pasty products obtained from coriander fruits
were processed after water-blanching applying the same time-temperature regimes. Among the 11 phenolics
characterised in leaves by high-performance liquid chromatography coupled to mass spectrometric
detection, several caffeic acid derivatives, 5-feruloylquinic and 5-p-coumaroylquinic acids were tentatively
identified for the first time. In fruits, 10 phenolics were detected, whereas rutin, a dicaffeic acid
derivative and two feruloylquinic and caffeoylquinic acid isomers were newly detected. Upon steamblanching
for 1 min, phenolic contents and antioxidant capacities remained virtually unchanged. In contrast,
water-blanching and extended steam-blanching even yielded increased levels compared to the
unheated control, whereas short-time water-blanching resulted in higher values than prolonged heat
treatment. Thus, short-time water-blanching is recommended as the initial unit in the processing of coriander
leaves and fruits into novel pasty products.
Fresh coriander leaves were steam- and water-blanched at 100 C and at 90 and 100 C, respectively, for1–10 min, and subsequently comminuted to form a paste. Pasty products obtained from coriander fruitswere processed after water-blanching applying the same time-temperature regimes. Among the 11 phenolicscharacterised in leaves by high-performance liquid chromatography coupled to mass spectrometricdetection, several caffeic acid derivatives, 5-feruloylquinic and 5-p-coumaroylquinic acids were tentativelyidentified for the first time. In fruits, 10 phenolics were detected, whereas rutin, a dicaffeic acidderivative and two feruloylquinic and caffeoylquinic acid isomers were newly detected. Upon steamblanchingfor 1 min, phenolic contents and antioxidant capacities remained virtually unchanged. In contrast,water-blanching and extended steam-blanching even yielded increased levels compared to theunheated control, whereas short-time water-blanching resulted in higher values than prolonged heattreatment. Thus, short-time water-blanching is recommended as the initial unit in the processing of corianderleaves and fruits into novel pasty products.
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