Evaluation of stability of bixin in nanocapsules in model systems of photosensitization and heating

Lobato, Kleidson Brito de Sousa; Paese, Karina; Forgearini, Joana Casanova; Guterres, Sílvia Stanisçuaski; Jablonski, André; Rios, Alessandro de Oliveira

doi:10.1016/j.lwt.2014.09.044

Cited by 32 publications

(20 citation statements)

References 24 publications

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“…Masek suggests the changes on coloration as an indicator of polymer ageing time [52]. Lobato et al increased the stability of bixin to light and temperature through the nanoencapsulation in poly--caprolactone [53]. In a study about use of natural compounds as photosensitizers to solar cells, Hug et al point out that if protected from direct sunlight, the betalains are stable for more than a year.…”

Section: Resultsmentioning

confidence: 99%

Photodegradation of UHMWPE Compounded with Annatto and Beetroot Extracts

Sousa

Dornas

Carvalho

et al. 2016

International Journal of Polymer Science

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We observed the anti-UV action of beetroot extract in an ultra-high molecular weight (UHMWPE) matrix. The beetroot extract and the one prepared from annatto seed also acted efficiently as pigment to the same polymeric matrix. Neat UHMWPE and UHMWPE compounded with annatto and beet extract were compression molded and tensile specimens were obtained from the molded plates and submitted to UV radiation for up to 42 days. Tensile tests were performed and it was observed that the beet extract had a stabilizing action in the polymer compared to neat polymer and the one with annatto extract. Complementary analyses showed good homogenization of the extracts through the polymer matrix indicating the possibility of use as pigment, although the annatto extract appeared to be very unstable under irradiation. Spectroscopic characterization helped to explain the stability of the extracts before and after molding.

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Section: Resultsmentioning

confidence: 99%

Photodegradation of UHMWPE Compounded with Annatto and Beetroot Extracts

Sousa

Dornas

Carvalho

et al. 2016

International Journal of Polymer Science

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“…The temperature was maintained at 90°C for 300 minutes. Aliquots were taken at 0, 15, 30, 45, 60, 90, 120, 150, 180, 240 and 300 minutes and cooled in an ice bath to 25°C [ 27 ]. In order to quantify the remaining dye, 1 mL of the cooled sample was washed three times with ethanol and centrifuged, with a total of 10 mL of solvent.…”

Section: Methodsmentioning

confidence: 99%

Development of a technique for psyllium husk mucilage purification with simultaneous microencapsulation of curcumin

et al. 2017

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This study focused on evaluating a technique for the psyllium husk mucilage (PHM) purification with simultaneous microencapsulation of curcumin. PHM was extracted with water and purified with ethanol. For the mucilage purification and simultaneous microencapsulation, an ethanolic solution of curcumin was used. After dehydration, the samples were analysed by instrumental techniques and evaluated for thermal stability. The presence of curcumin in the solution did not impair the yield of precipitated polysaccharide. Interactions of the dye and carbohydrates were confirmed by displacement of peaks in FT-IR and FT-Raman spectroscopy. The onset temperature of degradation of microcapsules was superior to that of curcumin. Thermal stability in solution at 90°C also improved. After 300 minutes of heating, the microcapsules had a remnant curcumin content exceeding 70%, while, in standard sample, the remaining curcumin content was 4.46%. Thus, the developed technique was successful on purification of PHM and microencapsulation of curcumin.

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“…The Ea values were 54.77 kJ mol −1 for ␤-carotene and 44.81 kJ mol −1 for lutein; these values are higher than those reported by Giménez et al (2015) for free ␤-carotene and lutein. Lobato et al (2015) reported that the Ea value of nanoencapsulated bixin (99.62 kJ mol −1 ) was higher than that of free bixin (63.01 kJ mol −1 ) at temperatures of 65, 80, and 95 • C for 125 min. Therefore, nanoencapsulation protects the compounds entrapped in the nanocapsules core.…”

Section: Ncs Stability Under Thermal Treatment In the Darkmentioning

confidence: 98%

“…3, asserting that the nanoencapsulation technique can be used as one of the ways to promote the protection of bioactive compounds. Lobato et al (2015) investigated the photo-stability kinetics of the bixin in model system of ethanol:water (2:8) in the presence of a 150 W filament lamp (36,000 lux) and noted that the Ea value in the nanocapsules produced with PCL (48.03 kJ mol −1 ) were higher than that in the free compound solution (29.66 kJ mol −1 ).…”

Section: Ncs and Ee Stability Under Uv-vis Light And Different Tempermentioning

confidence: 99%

“…Various conditions during food processing and storage may interfere with the nanoencapsulated carotenoid stability; however, the extent of interference is lower than that during free carotenoids degradation. Lobato et al (2015) produced nanoencapsulated bixin by interfacial deposition of the preformed polymer technique, and observed that non-nanoencapsulated bixin (free bixin) degraded before than nanoencapsulated bixin. The rate constants (k) of nonnanoencapsulated bixin is higher when compared to rate constants (k) of nanoencapsulated bixin at all the tested temperatures (65, 80, and…”

Section: Introductionmentioning

confidence: 99%

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Thermal and ultraviolet–visible light stability kinetics of co-nanoencapsulated carotenoids

Silva

Paese

Guterres

et al. 2017

Food and Bioproducts Processing

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Lipid-core nanocapsules loaded with ␤-carotene and ␣-carotene, and lutein (NCs) were produced with monomodal particle size distribution. Their mean diameter was 151.33 ± 5.03 nm (D 4,3) and 180.30 ± 0.70 nm (z-average), zeta potential was −22.63 ± 0.52 mV, and pH was 3.21 ± 0.04. The stability of NCs was studied under different simulated industrial treatments, such as thermal and ultraviolet (UV)-visible light treatment. Regardless of the temperature and incubation time of the samples, higher carotenoids retention (%) was observed in NCs than ethanol extract (EE) (under UV-vis light treatment) and higher carotenoids retention (%) was observed in NCs compared to EE and data already published on the stability of non-encapsulated carotenoids (under thermal treatment). In addition, NCs when exposed to UV-vis light treatment had higher activation energy and lower constant rate (k) than EE. In conclusion, nanoencapsulation offers greater stability to the ␤-carotene, ␣-carotene, and lutein upon exposure to conditions similar to those used in the food processing (heat) and storage (UV-vis light).

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Evaluation of stability of bixin in nanocapsules in model systems of photosensitization and heating

Cited by 32 publications

References 24 publications

Photodegradation of UHMWPE Compounded with Annatto and Beetroot Extracts

Photodegradation of UHMWPE Compounded with Annatto and Beetroot Extracts

Development of a technique for psyllium husk mucilage purification with simultaneous microencapsulation of curcumin

Thermal and ultraviolet–visible light stability kinetics of co-nanoencapsulated carotenoids

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