Evaluation of oxalates and calcium in nopal pads (Opuntia ficus-indica var. redonda) at different maturity stages

Contreras-Padilla, Margarita; Pérez-Torrero, Esther; Hernández-Urbiola, Margarita I.; Hernández-Quevedo, Gabriela; Real, Alicia Del; Rivera-Muñoz, Eric M.; Rodríguez‐García, Mario E.

doi:10.1016/j.jfca.2010.03.028

Cited by 74 publications

(33 citation statements)

References 22 publications

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“…It can be seen that the presence of the presence of organic material does not allow observation of the Bragg reflections of the crystalline compounds clearly, only it is evident the presence of calcium oxalate monohydrate which was identified with the PDF # 20-0231 of JCPDS-ICDD data base. This result is in agreement with that reported by Monje and Baran [10] and ContrerasPadilla et al [11], which identified the presence of calcium oxalate in plants of Opuntia genera. The calcium oxalate monohydrate is considered as antinutritional compound; however according to Contreras-Padilla et al [11], the presence of these compounds in nopal cladodes is low; therefore the calcium should be present in other compounds.…”

Section: Mineral Compositionsupporting

confidence: 94%

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Characterization of crystalline structures in Opuntia ficus-indica

et al. 2014

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This research studies the crystalline compounds present in nopal (Opuntia ficusindica) cladodes. The identification of the crystalline structures was performed using X-ray diffraction, scanning electron microscopy, mass spectrometry, and Fourier transform infrared spectroscopy. [KCl]. The SEM images indicate that calcite crystals grow to dipyramidal, octahedral-like, prismatic, and flower-like structures; meanwhile, calcium-magnesium bicarbonate structures show rhombohedral exfoliation and calcium oxalate monohydrate is present in a drusenoid morphology. These calcium carbonate compounds have a great importance for humans because their bioavailability. This is the first report about the identification and structural analysis of calcium carbonate and calcium-magnesium bicarbonate in nopal cladodes, as well as the presence of magnesium oxide, potassium peroxydiphosphate and potassium chloride in these plants. The significance of the study of the inorganic components of these cactus plants is related with the increasing interest in the potential use of Opuntia as a raw material of products for the food, pharmaceutical, and cosmetic industries.

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Section: Mineral Compositionsupporting

confidence: 94%

“…Contreras-Padilla et al [11] studied the presence of oxalates in nopal powders at different stages of development and found that this compound grows in the form of druses. At present, there are scarce studies reported worldwide about crystalline components in nopal cladodes.…”

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confidence: 99%

Characterization of crystalline structures in Opuntia ficus-indica

et al. 2014

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“…Freshly harvested cactus pear cladodes are regarded as vegetables; they present a high content of water and a minor proportion of dietary fiber, lipids, proteins and calcium. Other constituents are antioxidants, such as ascorbic acid, phenolic compounds, β-carotene, lutein and xanthophylls [13][14][15][16][17]. This part of the plant is known for its medicinal properties, such as an auxiliary treatment for obesity, and gastrointestinal or cardiovascular disorders.…”

Section: Introductionmentioning

confidence: 99%

Phenolic composition and antioxidant activities of cladodes of the two varieties of cactus pear (Opuntia ficus-indica) grown in Ethiopia

Haile¹,

Mehari²,

Atlabachew³

et al. 2017

Bull. Chem. Soc. Eth.

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ABSTRACT. In this study, young cladodes corresponding to two (thorn-less and thorn-containing) varieties of cactus pear (Opuntia ficus-indica) from four different areas of Tigray region, Ethiopia, were investigated for their phenolic contents and antioxidant activities. Quantitative estimation of total phenolic contents and antioxidant activities in the cladodes was carried out using spectrophotometric methods. A 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging assay was used for the determination of the antioxidant activities, while Folin-Ciocalteau reagent, aluminum chloride and protein (albumin) precipitation methods were used for the determination of total polyphenol, flavonoid and tannin contents, respectively. The cladodes were found to be rich in polyphenols, with values in the range 18.071.4 mg gallic acid equivalent (GAE)/g of dry weight (DW). The predominant part of the polyphenols is represented by tannins, 9.0041.2 mg GAE/g of DW, followed by flavonoids, 6.4025.0 mg catchin equivalent (CE)/g of DW. The cladodes showed strong antioxidant activities, 59.385.8% inhibition compared to ascorbic acid. Application of paired t-test on the overall mean total polyphenol contents of samples collected from the different areas revealed the presence of significant variation between the thorn-less (31.6 GAE/g of DW) and thorn-containing (47.7 GAE/g of DW) varieties. One-way ANOVA also revealed that there are significant variations among samples from the same variety but collected from different areas.

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“…These results seem to indicate that the resistance of penetration depend more on hypodermal cell-wall lignification and calcium oxalate crystals than on the characteristics of the cuticle and epidermis. Nevertheless, the accumulation of calcium oxalate reduces the food quality because these compounds bind essential minerals and form complexes that decrease calcium absorption (Contreras-Padilla et al, 2011). Although we did not make a study about of presence of calcium oxalate during development of sprouts produced under hydroponics, the increased of ash observed above from mid-developed sprouts to mature sprouts is relate to the calcium presence and with the increase in penetration resistance as it was observed by Contreras-Padilla et al (2011) (Fig.…”

Section: Nopalito Qualitymentioning

confidence: 66%