Antioxidant capacity and phenolic content of selected tropical fruits from Malaysia, extracted with different solvents

Alothman, Mohammad; Bhat, Rajeev; Karim, A.A.

doi:10.1016/j.foodchem.2008.12.005

Cited by 667 publications

(499 citation statements)

References 27 publications

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“…The percentage inhibition of DPPH radicals, FRAP value, total phenolics, total tannins, and total flavonoids of methanolic extracts of starfruit were two fold higher than the aqueous extracts. Solvent extraction of phenolics and antioxidant compounds by using methanol, ethanol, acetone or ethyl acetate have been routinely employed for extraction from fresh fruits (Alothman et al 2009;Wijekoon et al 2011). The recovery of polyphenols and antioxidant from plant materials is known to be influenced by the solubility of these compounds in a particular solvent used for extraction process, and is dependent on the solvent polarity (Naczk and Shahidi 2006;Annegowda et al 2011).…”

Section: Resultsmentioning

confidence: 99%

“…Incorporation of fresh fruits and vegetables in the normal diet is known to promote health and can overcome some of the degenerative diseases like cardiovascular disease, ageing, brain dysfunction and cancer (Alothman et al 2009). The positive health effects are linked to the presence of phenolic compounds, which exhibits rich antioxidant activities (Oboh and Ademosun 2011).…”

Section: Introductionmentioning

confidence: 99%

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Influence of sonication treatments and extraction solvents on the phenolics and antioxidants in star fruits

et al. 2011

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The present study was conducted to examine the effects of sonication treatments (time intervals of 0, 15, 30, 45 and 60 min.) on phenolics and other antioxidant compounds in starfruits extracted in methanol and water. Overall, methanolic extracts exhibited significantly higher extractability, percentage inhibition of DPPH radicals, ferric reducing antioxidant property (FRAP) value, antioxidant capacity, flavonoids, total phenolics and tannins (p<0.05) compared to control (0 min) and aqueous extracts. Methanolic extract obtained after 30 min of sonication proved to be the best treatment with regard to various parameters evaluated. Results of the present study clearly indicated sonication treatments to be effective in enhancing the antioxidant compounds in starfruit extracts and could be further explored for commercial purposes to benefit the consumers.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of sonication treatments and extraction solvents on the phenolics and antioxidants in star fruits

et al. 2011

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“…Minor amounts of phenolic acids such as protocatechuic acid, caffeic acid, vanillic acid and p-coumaric acids were also detected. The differences in the amounts of phenolic compounds may occur due to differences in the extraction methods, origin of seeds, environmental conditions and the treatments applied to the seeds before extraction (Alothman et al, 2009). The carotenoid composition (β-carotene, lutein, zeaxanthin and cryptoxanthin) of the cold-pressed PSOs is alsogiven in Table 4.…”

Section: α-T β-T γ-T δ-T α-Ttmentioning

confidence: 99%

Cold-pressed pumpkin seed (<em>Cucurbita pepo</em> L.) oils from the central Anatolia region of Turkey: Characterization of phytosterols, squalene, tocols, phenolic acids, carotenoids and fatty acid bioactive compounds

et al. 2018

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SUMMARY:There is a growing interest in cold-pressed oils because they present high contents of bioactive compounds. These oils have the characteristic properties of seeds and are specific products of their regions. The aim of this study was to determine the compositions and contents of fatty acids, phytosterols, squalene, tocols, phenolic acids, carotenoids and phenolic bioactives, and the free radical scavenging as well as antioxidant activities of coldpressed pumpkin (Cucurbita pepo L.) seed oils. Oil samples from raw pumpkin seeds cultivated in four different central Anatolia regions of Turkey were prepared using a laboratory screw-pressing machine. The results indicate that coldpressed pumpkin seed oils (PSO) have excellent quality with high contents of polyunsaturated fatty acids (%∑PUFAs) (53.60 ±0.06−53.73 ±0.05), total phytosterols (782.1±9.7-805.2 ±11.3 mg/100 g oil), squalene (591.3±10.6-632.5±11.4 mg/100 g oil), tocols (97.79 ±0.76−94.29 ±0.34 mg/100 g oil), phenolic acids (22.73 ±0.41-23.98 ±0.46 mg/100 g oil), carotenoids (6.95 ±0.03-7.60 ±0.03 mg/100 g oil), total phenolics (3.96 ±0.13 -5.82±0.15 mg GAE/100 g), free radicalscavenging activity (5.70 ±0.13−7.35 ±0.15 mg GAE/100 g) and total antioxidant activity (26.67±0.97−38.89±1.41 mg GAE/100 g) values. Thus, this study demonstrates that the cold-pressed PSOs from the central Anatolia regions of Turkey are an excellent source of natural bioactive compounds, free of chemical contaminants and nutritious.KEYWORDS: Antioxidant activity; Bioactive compound; Cold-pressed oil; Cucurbita pepo L.; Phenolic acid; Tocol profile RESUMEN: Aceites de semillas de calabaza prensados en frío (Cucurbita pepo L.) de la región central de Anatolia en Turquía: Caracterización de fitosteroles, escualeno, tocoles, ácidos fenólicos, carotenoides y compuestos bioactivos de ácidos grasos. Existe un interés creciente en los aceites prensados en frío, ya que presentan altos contenidos de compuestos bioactivos. Estos aceites tienen las propiedades características de las semillas y son productos específicos de las regiones. El objetivo de este estudio fue determinar las composiciones y contenidos de ácidos grasos, fitoesteroles, escualeno, tocoles, ácidos fenólicos, carotenoides y bioactivos fenólicos, la actividad de eliminación de radicales libres, así como las actividades antioxidantes de aceites de semillas de calabaza prensados en frío (Cucurbita pepo L.). Las muestras de aceite de semillas de calabaza cultivadas en cuatro regiones diferentes de Anatolia central de Turquía se prepararon utilizando una máquina de laboratorio de prensado mediante tornillo. Los resultados indican que los aceites de semilla de calabaza prensados en frío (PSO) tienen una excelente calidad, con altos contenidos de ácidos grasos poliinsaturados (%ΣPUFA) (53,60±0,06-53,73±0,05), fitoesteroles totales (782,1±9,7-805,2±11,3 mg/100 g de aceite), escualeno (591,3 ± 10,6-632,5 ± 11,4 mg/100 g de aceite), tocols (97,79±0,76-94,29±0,34 mg/100 g de aceite), ácidos fenólicos (22,73 ± 0,41-23,98 ± 0.46 mg/10...

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“…The free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging of the mango extracts were defined spectrophotometrically pursuant to the technique defined by Alothman et al (2009). A properly diluted extract of 0.1 mL was poured into methanolic solution of DPPH radical (3.9 mL of 25 mM) and whisked (WiseMix VM-10, Korea) approximately 15 to 30 seconds.…”

Section: Antioxidant Capacity Determinationmentioning

confidence: 99%

Influence of different drying techniques on drying parameters of mango

İzli

Taşkın

2017

Food Sci. Technol

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This research inspected the effects of freeze, microwave (120 and 350 W) and hot air (60, 70 and 80 °C) drying techniques on the color, drying characteristics, antioxidant capacity and total phenolic content of mango slices. Midilli et al., Two-term and Page models which exemplify drying characteristics are superior than alternative models. All of the color values (a, b, L, C, α and ΔE) were altered notably based on the used drying technique and colors nearest to the fresh sample were attained with freeze drying. In comparison to the fresh sample, the dried samples showed a decrease of 18.4-54.6% in antioxidant capacity. The total phenolic content value was notably highest one for the microwave dried sample at 350 W and the lowest one for a hot air dried sample at 80 °C (P<0.05). This research showed that microwave drying at 350 W is able to yield high-quality mango slices with the extra advantage of shortened drying time in relation to hot air and freeze drying.Keywords: hot air drying; freeze drying; microwave drying; modeling; quality. Practical Application:The ideal drying conditions of mango samples were fixed up for the hot air drying technique at 60 °C temperature and for the microwave drying technique at the power of 350 W.

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Antioxidant capacity and phenolic content of selected tropical fruits from Malaysia, extracted with different solvents

Cited by 667 publications

References 27 publications

Influence of sonication treatments and extraction solvents on the phenolics and antioxidants in star fruits

Influence of sonication treatments and extraction solvents on the phenolics and antioxidants in star fruits

Cold-pressed pumpkin seed (<em>Cucurbita pepo</em> L.) oils from the central Anatolia region of Turkey: Characterization of phytosterols, squalene, tocols, phenolic acids, carotenoids and fatty acid bioactive compounds

Influence of different drying techniques on drying parameters of mango

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