Raman Spectroscopic Investigation of Carotenoids in Oils from Amazonian Products

Ferreira, Bianca Silva; Almeida, Camila G. de; Hyaric, Mireille Le; Oliveira, Vanessa E. de; Edwards, Howell G. M.; Oliveira, Luiz Fernando Cappa de

doi:10.1080/00387010.2012.693569

Cited by 15 publications

(9 citation statements)

References 40 publications

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“…In these photosynthetic organisms, an universal pigment is the carotenoids class; carotenoids have important functions for maintenance of the cellular matrix integrity, an important supporting for light harvesting and other, for example in the prevention/repair of the photo-oxidative damage [18,36]. The rather wide range of carotenoids colorations aforementioned has motivated their study and recognition by Raman spectroscopy [37] in particular the in situ detection and characterization of polyunsaturated structures [38][39][40][41][42][43], Figure 1.…”

Section: Cylindrospermopsis Raciborskii (Cyrf) and Microcystis Aerugimentioning

confidence: 99%

Study of carotenoids in cyanobacteria by Raman spectroscopy

Oliveira

Miranda

Soares

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: Cylindrospermopsis Raciborskii (Cyrf) and Microcystis Aerugimentioning

confidence: 99%

Study of carotenoids in cyanobacteria by Raman spectroscopy

Oliveira

Miranda

Soares

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…Raman spectroscopy is an advanced technique that can be used to determine the fatty acid profile, i.e. degree of unsaturation in vegetable oils [19,20], and to detects their minor components, for example, carotenoids [36,37] and tocopherols [38,39] responsible for biological activity. Moreover, it was recently reported that Raman spectroscopy can be used to elaborate the structural changes when incorporating oils and curcumin [25] or proteins [26] into nano-droplets, as well as to study interactions among nanoemulsion components.…”

Section: Formulation Study Of Red Raspberry Seed Oil-loaded Le-nes: Pmentioning

confidence: 99%

“…As shown on Fig 3A, the fingerprint region of the Raman spectra of ROs (1800 to 800 cm -1 ) is dominated by two distinct spectral patterns: the pattern of the unsaturated fatty acids-UFAs (linoleic acid C18:2 ω6, α-linolenic acid C18:3 ω3 and oleic acid C18:1 ω9), and the pattern of the saturated fatty acids (palmitic C16:0 and stearic C18:0 acids). Therefore, the spectra of all four ROs were very similar, exhibiting the bands related to oils and fats positioned at:~1747 cm -1 (C = O, ester carbonyl stretching),~1659 cm -1 (C = C in fatty acid hydrocarbon chains),~1440 cm -1 (scissoring deformation vibrations of CH2 groups in fatty acid chains),~1305 cm -1 (in-phase methylene twisting),~1266 cm -1 (stretch due to deformation vibrations in = C-H), and~1079 cm -1 (skeletal C-C stretching vibrations) [19,20,36,37]. The most prominent observed difference refers to the relative intensity ratios of the bands related to the degree of unsaturation in the oil hydrocarbon chains: I1266/I1305 ( Fig 3B) and I1659/I1749 (Fig 3C) ratios were noticeably higher in the case of RO1, RO3, and RO4 oils compared to RO2 oil.…”

Section: Plos Onementioning

confidence: 99%

Low-energy nanoemulsions as carriers for red raspberry seed oil: Formulation approach based on Raman spectroscopy and textural analysis, physicochemical properties, stability and in vitro antioxidant/ biological activity

et al. 2020

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Considering a growing demand for medicinal/cosmetic products with natural actives, this study focuses on the low-energy nanoemulsions (LE-NEs) prepared via the Phase inversion composition (PIC) method at room temperature as potential carriers for natural oil. Four different red raspberry seed oils (ROs) were tested, as follows: cold-pressed vs. CO 2extracted, organic vs. non-organic, refined vs. unrefined. The oil phase was optimized with Tocopheryl acetate and Isostearyl isostearate, while water phase was adjusted with either glycerol or an antioxidant hydro-glycolic extract. This study has used a combined approach to formulation development, employing both conventional methods (pseudo-ternary phase diagram − PTPD, electrical conductivity, particle size measurements, microscopical analysis, and rheological measurements) and the methods novel to this area, such as textural analysis and Raman spectroscopy. Raman spectroscopy has detected fine differences in chemical composition among ROs, and it detected the interactions within nanoemulsions. It was shown that the cold-pressed, unrefined, organic grade oil (RO2) with 6.62% saturated fatty acids and 92.25% unsaturated fatty acids, was optimal for the LE-NEs. Textural analysis confirmed the existence of cubic gel-like phase as a crucial step in the formation of stable RO2-loaded LE-NEs, with droplets in the narrow nano-range (125 to 135 nm; PDI � 0.1). The DPPH test in methanol and ABTS in aqueous medium have revealed a synergistic free radical scavenging effect between lipophilic and hydrophilic antioxidants in LE-NEs. The nanoemulsion carrier has improved the biological effect of raw materials on HeLa cervical adenocarcinoma cells, while exhibiting good safety profile, as confirmed on MRC-5 normal

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“…Algumas pesquisas têm avaliado a conversão de subprodutos em ingredientes para alimentos e componentes para fármacos (Santana-Méridas et al, 2012). Outras indicam que partes do fruto e da planta de espécies do gênero Passiflora são boas fontes de polifenois (Oliveira et al, 2009;Martinez et al, 2012), ácidos graxos (Liu et al, 2009) e carotenoides (Ferreira et al, 2013), compostos de alto valor nutricional, aos quais se atribui diversos benefícios à saúde. A obtenção destes compostos pode originar uma gama de produtos comerciais, seja matéria-prima para processos secundários, substitutos para ingredientes ou ingredientes de novos produtos (Martinez et al, 2012).…”

Section: Introductionunclassified

EXTRAÇÃO DE COMPOSTOS BIOATIVOS DE SEMENTES DE MARACUJÁ-AZEDO (Passiflora edulis) UTILIZANDO LÍQUIDOS PRESSURIZADOS

Barrales¹,

Viganó²,

Correa³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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RESUMO -O objetivo deste trabalho foi extrair compostos fenólicos de sementes de maracujá e verificar a capacidade antioxidante dos extratos. Técnicas de extração utilizando líquidos pressurizados, como água e etanol, são consideradas ambientalmente corretas, pois estes solventes não oferecem riscos ambientais e ao produto. Os experimentos de extração seguiram um planejamento experimental composto central com os fatores temperatura (30-80 °C) e percentual de etanol em água (0-100%). As variáveis vazão de solvente, pressão e tempo de extração foram mantidas constantes. Após a extração, os extratos foram armazenados a -18 °C e analisados quanto ao rendimento, fenólicos totais e capacidade antioxidante. As análises de fenólicos totais foram realizadas segundo o método Folin-Ciocalteu e a capacidade antioxidante por ensaios DPPH. Os resultados indicaram que maiores temperaturas e concentrações de etanol em água favorecem a obtenção de maiores percentuais de rendimento, fenólicos totais e capacidade antioxidante. A melhor condição obtida por este trabalho foi 55 °C e 100 % etanol, em que se obteve 6,285 % de rendimento, fenólicos totais igual a 322,166 mgAGE/100g e atividade antioxidante de 317,261 mgTE/100g. INTRODUÇÃOA produção, o comércio e o consumo de frutos tropicais exóticos têm aumentado nos últimos anos devido às suas propriedades sensoriais atrativas e ao reconhecimento de seu valor nutricional e terapêutico. Em muitos casos estes frutos não são somente consumidos na forma in natura. O maracujá-azedo (Passiflora edulis), utilizado pela indústria de alimentos em grande quantidade na fabricação de suco e polpa, é um exemplo.Os processos de separação da polpa de maracujá produzem volumes consideráveis de resíduos devido à separação da casca, fibras da polpa e sementes. Estima-se que este material corresponde entre 60 e 70 % da massa do fruto (Zeraik et al., 2010;Gerola et al., 2013). O desenvolvimento de técnicas que visam ao uso eficiente dos subprodutos agroindustriais pode agregar valor a estes materiais e reduzir impactos ambientais resultantes de seu descarte.A valorização dos subprodutos agroindustriais está recebendo especial atenção nos últimos anos. Algumas pesquisas têm avaliado a conversão de subprodutos em ingredientes para alimentos e componentes para fármacos (Santana-Méridas et al., Área temática: Engenharia e Tecnologia de Alimentos 1

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Raman Spectroscopic Investigation of Carotenoids in Oils from Amazonian Products

Cited by 15 publications

References 40 publications

Study of carotenoids in cyanobacteria by Raman spectroscopy

Study of carotenoids in cyanobacteria by Raman spectroscopy

Low-energy nanoemulsions as carriers for red raspberry seed oil: Formulation approach based on Raman spectroscopy and textural analysis, physicochemical properties, stability and in vitro antioxidant/ biological activity

EXTRAÇÃO DE COMPOSTOS BIOATIVOS DE SEMENTES DE MARACUJÁ-AZEDO (Passiflora edulis) UTILIZANDO LÍQUIDOS PRESSURIZADOS

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