Determination of the proximate composition, ascorbic acid and heavy metal contents of Star Fruit (Averrhoa carambola)

Edem, C. A.; Dosunmu, Miranda I.; Ebong, AC; Jones, Matt

doi:10.4314/gjpas.v14i2.16797

Cited by 2 publications

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“…However, the ash content is relatively higher in minor fruits in the present research (Table 3). The per cent CP and CF of unripe fruit samples were very similar, however, a wide variation was observed in the proximate composition of ripe star fruit samples between Nigeria and Bangladesh (Edem et al 2008). Although the amount of CP (%) and CF (%) were relatively smaller, the calorific value of A. marmelos was higher compared to Indian samples (Table 3; Singh et al 2012).…”

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confidence: 94%

Proximate Composition and Phytochemical Analysis of Six Minor Fruits of Bangladesh

et al. 2023

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Nutritional composition of six minor fruits of Bangladesh namely, Annona reticulata L., Manilkara zapota (L.) P.Royen, Aegle marmelos (L.) Corrêa, Diospyros malabarica (Desr.) Kostel., Averrhoa carambola L. and Garcinia pedunculata Roxb. ex Buch-Ham. were studied. Dry matter, ash, crude fat, crude protein, crude fibre and crude carbohydrate contents largely varied among the studied fruits. All fruits exhibited the presence of alkaloids, flavonoids, terpenoids, tannins, phenols, and saponins. At premature stage, total phenolics and tannin contents varied from 14.59 to 1.32 and from 9.76 to 0.29 (mg GAE g–1 DW), respectively while at mature stage, these ranged from 9.82 to 0.87 and from 5.98 to 0.23. At premature and ripening stages, the maximum chlorophyll content was detected in A. reticulata and M. zapota, respectively. Based on the calorific value, Garcinia pedunculata performed better followed by M. zapota, and A. carambola the least among the studied fruits; although, A. reticulata possesses the largest amount of crude protein and crude fibre. Bangladesh J. Bot. 52(1): 111-118, 2023 (March)

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Section: Resultsmentioning

confidence: 94%

Proximate Composition and Phytochemical Analysis of Six Minor Fruits of Bangladesh

et al. 2023

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Preliminary characterization of the enzyme polyphenol oxidase and rheological behavior from Averrhoa carambola juice

Murillo

Aristizábal

Murillo

et al. 2017

Rev. Fac. Nac. Agron.

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Averrhoa carambola fruit represents a potential as an agro-industrial production line. A restriction on the use of this exotic fruit is the susceptibility to enzymatic browning, affecting nutritional and visual acceptance. The aim of this study was to determine the physical and chemical composition of A. carambola at three stages of maturity. The polyphenol oxidase enzyme has also been characterized on the fruits and juices. Also, the enzymatic effect on the ripening stages and the fruit juices flow behavior were equally determined using different rheological models. The increasing in degrees Brix (unripe (UR) 6.63 ± 0.25, intermediate (IN) 6.8 ± 0.10 and ripe (R) 8.26 ± 0.37) and the decreasing of the pectinic content (UR 4.35% ± 0.98, IN 3.6% ± 1.26 and R 2.25% ± 0.76) could be considered as indicators of fruit ripening. The protein content and levels of organic acids decreased during the ripening of fruit was observed, indicate a high metabolic rate during this process. For all stages, the polyphenol oxidase exhibited a maximum activity at pH 8 and 40 °C. In the fruit aqueous fraction, the enzyme would be an appropriate indicator in industrial handling (temperatures below 20 °C and pH less than 7), which would control enzymatic browning. According to the rheological study, the viscosity variation (η: UR (13.4 to 1.1), IN (15.4 to 1.4), R (69.6 to 2.9)) with temperature changes (10 to 50 °C) is adjusted to the Arrhenius equation, whereas the effect of soluble solids content on the samples viscosity was accurately described by an exponential equation. This appears to be the first work to study the rheological properties and polyphenol oxidase enzyme of A. carambola fruit in our country, the information provided from this study could be helpful to the successful development of new food functional products.

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Determination of the proximate composition, ascorbic acid and heavy metal contents of Star Fruit (Averrhoa carambola)

Cited by 2 publications

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Proximate Composition and Phytochemical Analysis of Six Minor Fruits of Bangladesh

Proximate Composition and Phytochemical Analysis of Six Minor Fruits of Bangladesh

Preliminary characterization of the enzyme polyphenol oxidase and rheological behavior from Averrhoa carambola juice

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