Kinetics study of norbixin’s first stage thermal decomposition, using dynamic method

Silva, Gerlania S.; Souza, A. G.; Botelho, J. R.; Silva, M. C. D.; Silva, T. M. S.

doi:10.1007/s10973-006-8198-6

Cited by 9 publications

(6 citation statements)

References 24 publications

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“…According to thermal data presented in Figure 8, isolated norbixin undergoes mainly four decomposition steps under oxidizing atmosphere. Oxidative events are the main forms of mass loss according to the differential The profile of the TG curve shown in Figure 8 is similar to that one presented by Silva et al 54 for cis-norbixin (extracted from annatto) up to 400 ºC (about 50% of mass loss) under nitrogen atmosphere and 10 ºC min -1 heating rate. At higher temperature values, the thermal behavior is distinct: mass loss is extended to ca.…”

Section: Resultssupporting

confidence: 79%

Intercalation of Apocarotenoids from Annatto (Bixa orellana L.) into Layered Double Hydroxides

Perotti¹,

Silva²,

Couto³

et al. 2020

J. Braz. Chem. Soc.

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Synthetic conditions were evaluated to intercalate norbixin into layered double hydroxides (LDH). Norbixin was isolated from a hydrosoluble commercial annatto extract. LDH samples comprising M 2+ /Al 3+ (M = Mg, Zn) were synthesized by coprecipitation and characterized by X-ray diffraction, thermal analysis coupled to mass spectrometry, vibrational spectroscopies, and solid-state 13 C nuclear magnetic resonance. Radical scavenging activity of LDH hybrids was monitored by electron paramagnetic resonance towards the stable radical DPPH (1,1-diphenyl-2-picrylhydrazyl). LDH hosts presented more than 50 wt.% of norbixin and d-spacing (003) values of about 2.5 or 3.0 nm depending of the cation LDH composition. Vibrational spectra assignment (supported by density functional theory calculations) confirmed the chemical integrity of norbixin after intercalation into LDH. The inorganic layers were found to enhance the thermal stability of norbixin upon intercalation. The free radical scavenging capacity of norbixin was retained when immobilized into LDH. Considering that zinc and magnesium-LDH matrices are biocompatible and that norbixin presents biological activity, the hybrid materials appear as promising systems for biomedical assessment.

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Section: Resultssupporting

confidence: 79%

Intercalation of Apocarotenoids from Annatto (Bixa orellana L.) into Layered Double Hydroxides

Perotti¹,

Silva²,

Couto³

et al. 2020

J. Braz. Chem. Soc.

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“…These results suggested that it is better to carry out the extraction of annatto pigment by sodium hydroxide solution at 50 o C because the extraction at this temperature can achieve significantly higher bixin extraction yield than that of extraction at 40 o C. Furthermore, this extraction can also reduce the loss of bixin caused by high temperature. The significant effect of temperature on the degradation of bixin was reported in a number of previous studies such as Shuhama et al (2003), Balaswamy et al (2006) and Silva et al (2007).…”

Section: Effects Of Temperaturesupporting

confidence: 52%

Effects of different extraction methods on the recovery yield of bixin from annatto seeds (Bixa orellana L.)

Hoang

2019

The J. Agric. Dev.

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Bixin is a principal color component of annatto pigment which is obtained from the seed coat of Bixa orellana L., a tropical shrub. The extraction yield of bixin from annatto seeds using acetone, soybean oil and sodium hydroxide solution with different extraction conditions were investigated in this study. The extraction time, temperature, solid-liquid ratio and light exposure showed significant effects on the bixin yield. The extraction using soybean oil had the lowest bixin yield followed by the extraction using sodium hydroxide solution. The extraction using acetone resulted in the highest extraction yield (68.1%) after only 40 min. The extraction using soybean oil at 100oC led to two-fold bixin yield compared to that operated at 80oC while the mild temperature (50oC) was found to be the most suitable for the extraction using sodium hydroxide solution. The exclusion of light exposure by covering extraction beakers with aluminum foil could significantly improve the bixin extraction yield due to the reduction in bixin degradation. Therefore, the extraction using acetone avoiding light exposure is suggested for recovering bixin from annatto seeds.

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“…However, only 25% of the total industrial annatto seeds are used in the preparation of water-soluble extracts. The dairy industry is the biggest consumer as they are used to color cheeses and yogurt, as well as other products such as sausages, salami, salad dressings, breakfast cereals, pasta, sweets, ice creams, chocolates, soft drinks, and liqueurs. − …”

Section: Introductionmentioning

confidence: 99%

Microencapsulation by Freeze-Drying of Potassium Norbixinate and Curcumin with Maltodextrin: Stability, Solubility, and Food Application

Sousdaleff

Baesso

Medina

et al. 2013

J. Agric. Food Chem.

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Stability of potassium norbixinate and curcumin by microencapsulation with maltodextrin DE20 and freeze-drying was evaluated as a function of exposition to light, air, different pH, water solubility, and in food applications. The best results were obtained with microencapsulated potassium norbixinate 1:20, which, when vacuum-packed and in the presence of natural light, showed color retention of 78%, while microencapsulated curcumin 1:20 showed color retention of 71%. Differential scanning calorimetry and thermogravimetry provided an indication of interaction between colorants and maltodextrin. Photoacoustic spectroscopy (PAS) showed that free and microencapsulated colorants exhibited high rates of absorption throughout the measured spectral region. This work evidenced that the freeze-drying process is favorable for microencapsulation of curcumin by maltodextrin, providing improved solubility to the microencapsulated colorant. Both microencapsulated colorants showed relevant results for use in a wide range of pH and food applications. The PAS technique was useful for the evaluation of the stability of free and microencapsulated colorants.

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Kinetics study of norbixin’s first stage thermal decomposition, using dynamic method

Cited by 9 publications

References 24 publications

Intercalation of Apocarotenoids from Annatto (Bixa orellana L.) into Layered Double Hydroxides

Intercalation of Apocarotenoids from Annatto (Bixa orellana L.) into Layered Double Hydroxides

Effects of different extraction methods on the recovery yield of bixin from annatto seeds (Bixa orellana L.)

Microencapsulation by Freeze-Drying of Potassium Norbixinate and Curcumin with Maltodextrin: Stability, Solubility, and Food Application

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