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In Mexico, mango processing waste constitutes approximately 600,000 tons per year. This work aims to evaluate peels and seeds' bioactive compounds and antioxidant activity (AA) from Mangifera indica L cv Ataulfo waste. Mango peel flour (MPF) and mango seed flour (MSF) were obtained. Mango seed oil (MSO) was obtained from MSF, then physicochemically evaluated, and the fatty acid composition was determined by methyl esters formation (FAME) and gas chromatography. The total phenolic content (TPC), carotenoids, chlorophyll a, b, and total, and vitamin C from the MSF and MSO extracts were quantified. The AA was analyzed by DPPH and ABTS. The MSO showed similar physicochemical characteristics and fatty acid composition to cocoa butter and shea butter. Stearic (C18:0), oleic (C18:1), and linoleic (C18:2) fatty acids constituted the majority of the total fatty acids, and the ratio of stearic: oleic acids was 0.82. The MPF had 186.11 ± 0.94 mg GAE/g of TPC, 164.67 ± 1.56, 292.88 ± 1.38, and 457.55 ± 0.93 mg/kg of chlorophylls a, b, and total, respectively, and the carotenoid content in MSO was 120.76 ± 1.98 mg β-carotene/kg. All bioactive compounds influenced the AA. [ABSTRACT FROM AUTHOR]

The present work evaluated the influence of extraction method and species on the physicochemical properties, oxidative stability, fatty acid profiles, and rheological behaviour of pumpkin seed oils. The seeds of two pumpkin species (Cucurbita argyrosperma Huber [CA] and Cucurbita moschata Duchesne [CM]) were obtained from small-scale pumpkin processors in Yucatán, Mexico. The oils were extracted by two methods: mechanical pressing (MP) and organic solvent (OS). It was found that the oil extraction method, species, and their interaction significantly influenced the physicochemical properties and oxidative stability of the seed oils. The composition and fatty acid content of the oils were comparable to those of other pumpkin species. The oil yield from the MP method was lower than that from the OS method. Also, CA oil extracted by MP had an olive-green colour as compared to the reddish-yellow colour of CM oil, and also had a higher oxidative stability. The viscosity of CA oil extracted by MP was superior to that extracted by OS. Also, CA oil had a higher content of iron, monounsaturated fatty acids (MUFA), stearic acid, and oleic acid as well as viscosity in comparison to CM oil, although CM oil had a higher content of linoleic acid. This information can be used to obtain more stable pumpkin oils with enhanced properties that would benefit both producers and processors. [ABSTRACT FROM AUTHOR]

In this study, the effect of the extraction method (mechanical pressing, MP and organic solvent, OS) and the specie (Cucurbita argyrosperma Huber, CA; and Cucurbita moschata Duchesne, CM) on the content of bioactive compounds and antioxidant activity of oil from pumpkin of Yucatan, Mexico was investigated. Between the two extraction methods, the oil extracted by MP obtained the highest values for total phenolic compounds (TPC), total carotenoids, squalene, quercetin, β-carotene, fucosterol, stigmasterol and antioxidant activity (DPPH, ABTS and reducing power). Between the two species, the CM oil extracted with MP or OS exhibited the highest values for carotenoids, sterols and antioxidant activity (DPPH and ABTS). Thus, it can be concluded that the method and specie affect the composition of bioactive compounds and antioxidant activity of the pumpkin oil. This information is useful for the extraction of pumpkin oil with a higher content of compounds, of interest for the industry., (Copyright © 2019 Elsevier Ltd. All rights reserved.)

The aim of this study was to determine the antioxidant compounds, antioxidant activity and content of individual phenolic compounds of freeze-dried peel from three tropical fruits grown in Yucatan, México: purple star apple (Chrysophyllum cainito L.), yellow cashew and red cashew (Anacardium occidentale). The freeze-dried peels were good source of antioxidant compounds. ABTS and DPPH values in the peel from each fruit were 3050.95-3322.31 μM Trolox/100g dry weight (DW) or 890.19-970.01 mg of vitamin C/100 g DW, and 1579.04-1680.90 μM Trolox/100 g DW or 340.18-362.18 mg of vitamin C/100 g DW, respectively. Six phenolic compounds were identified in the peel from the tropical fruits studied: ferulic, caffeic, sinapic, gallic, ellagic and myricetin. This study demonstrated that freeze-dried peels from purple star apple, yellow cashew and red cashew, could serve as potential sources of antioxidants for use in food and pharmaceutical industries., (Copyright © 2014 Elsevier Ltd. All rights reserved.)

Stevia rebaudiana leaves and their glycosides have been recently and significantly used so important as sweeteners. However, it has been reported an antihyperglycemic effect of the extract and a glycoside. The aim of this study was to quantify S. rebaudiana glycosides, assess cytotoxicity of the extract and its acute and chronic effect on blood glucose in animal models and in human. The glycosides of the Morita II and Criolla extract were quantified by HPLC, using a C18 column (250 mm x 4.6 mm and particle size of 5 uM) with UV detection at 210 nm, mobile phase of acetonitrile/sodium phosphate buffer 10 mmol/L, pH 2.6 (32:68 v/v). Cytotoxicity study was performed in Vero cells, whereas an intraperitoneal glucose tolerance test (IPGTT) and a chronic consumption assay (4 weeks) were executed in an animal model of diabetes; finally the glycemic index (G.I.) was determined in healthy individuals. The glycoside content is higher in the Morita variety II although both had a CC50 >300 g/mL. The areas under the curve of the IPGTT and fasting glucose of the animals were not significantly different (p> 0.05) and the I.G. extract was 11.11 %, which classifies the extract as low I.G. The extract of S. rebaudiana Morita II has a low glycemic index and, in the doses tested, is not cytotoxic nor has acute or chronic effect on blood sugar, which makes it a safe sweetener., (Copyright AULA MEDICA EDICIONES 2014. Published by AULA MEDICA. All rights reserved.)

The aim to the study was to determine the physicochemical composition, bioactive compounds and antioxidant activity of fruits from Yucatan, Mexico such as star apple, cashew, mombin, mamey sapote, white sapote, sugar apple, sapodilla, dragon fruit, nance, ilama, custard apple, mamoncillo and black sapote. The physicochemical characteristics were different between fruits and were good sources of bioactive compounds. The edible part with the highest values of antioxidant activity were mamoncillo, star apple, mombin, cashew, white sapote, ilama, custard apple, sugar apple, and nance. Total soluble phenols content showed a correlation with antioxidant activity by ABTS (R=0.52, P⩽0.05) and DPPH (R=0.43, P⩽0.05). A high correlation was obtained between the two assays (ABTS and DPPH) used to measure antioxidant activity in the tropical fruit species under study (R=0.82, P⩽0.05). The results show promising perspectives for the exploitation and use of tropical fruits studied with significant levels of nutrients and antioxidant activity., (Copyright © 2013 Elsevier Ltd. All rights reserved.)