Chemical composition, antioxidant capacity and phenolic contents of carob (Ceratonia siliqua L.) flour as related to seed presence and roasting effects

Research output: Contribution to conferenceAbstract

Abstract

Carob is the fruit of an evergreen tree (Ceratonia siliqua L.) cultivated in the Mediterranean area, where Portugal has a high-cultivated extent with relevant production and low prices. Carob is well known for its valuable locust bean gum. However, carob pods contain various relevant nutrients, including proteins, carbohydrates and fiber, and phytochemicals such as polyphenols, which position carob flour with great potential to be used as a functional ingredient. This study aimed to evaluate the impact of different roasting processes of carob flour (with and without seeds) on its nutritional composition and antioxidant activity. Seed presence led to a higher content of macronutrients in carob flour. The roasting processing affected the total content of polyphenols (TPC), determined by Folin-Ciocalteau, since the content at 150 ºC was twice of that obtained at 80 ºC, probably due to the formation of certain Maillard reaction products (MRPs), or certain phenolics that may degrade during roasting. The antioxidant activity is correlated with TPC, increasing when the flour was roasting at 150ºC. Regarding the total fiber content, a significant increase was observed in samples processed at 150 ºC. These findings confirm the importance of understanding the impact of processing on the nutritional value and bioactive properties of carob flours, to use them efficiently as a functional food ingredient.
Translated title of the contributionComposição química, capacidade antioxidante e conteúdo polifenólico da farinha de alfarroba ( Ceratonia siliqua L.) em relação à presença de semente e efeito de torrefação
Original languageEnglish
Number of pages2
Publication statusPublished - 2021
EventCMR|International Conference on Multidisciplinary Research - Instituto Politécnico de Viseu, Viseu, Portugal
Duration: 1 Jul 20212 Jul 2021

Conference

ConferenceCMR|International Conference on Multidisciplinary Research
Country/TerritoryPortugal
CityViseu
Period1/07/212/07/21

Keywords

  • Carob pulp
  • Seeds
  • Bioactive compounds
  • Antioxidant activity

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