Total anthocyanin content determination in intact açaí (Euterpe oleracea Mart.) and palmitero-juçara (Euterpe edulis Mart.) fruit using near infrared spectroscopy (NIR) and multivariate calibration

Inácio, Maria Raquel Cavalcanti; Lima, Kássio M. G.; Lopes, Valquiria Garcia; Pessoa, José Dalton Cruz; Teixeira, Gustavo Henrique de Almeida

doi:10.1016/j.foodchem.2012.09.046

Cited by 76 publications

(73 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Then, the readings were performed on Shimadzu UVMini 1240 (Shimadzu Corporation, Kyoto, Japan) at a wavelength of 520 and 700 nm for anthocyanin, respectively. For calculating the anthocyanin concentration, the following formula was employed:Where, TAC = total anthocyanin content in %; A = (A520 nm -A700 nm)pH1.0 -(A520 nm -A700 nm)pH4.5; MW (molecular weight) = 449.2 mol -1 ; DF = dilution factor; W = sample weight in mg; l = optical path in cm;  = 26.900 M extinction coefficient in L mol -1 cm -1 to cyd-3-glu The anthocyanin of the açaí fruits was expressed as cyanidin-3-glucose (Inácio et al, 2013) and this method is based on the fact that the monomeric anthocyanins undergo reversible structural change in function of the pH.In this assay the equipment Dissolution Model 299-6 was used (New Ethics, Ltda. Sao Paulo, Brazil) with rotation speed of 75 rpm.…”

mentioning

confidence: 99%

Study of kefir biofilm associated with hydroethanolic extract of Euterpe oleracea Mart. (aai)

Oliveira¹,

Maciel²,

Florentino³

et al. 2017

Afr. J. Microbiol. Res.

View full text Add to dashboard Cite

Kefir is a microbial complex capable of producing biofilms. This study aims to obtain biofilms associated with hydroethanolic extract of Euterpe oleracea Mart. (BEHEEo) as fixing method of recovery anthocyanins in kefir biofilm. Thus, BEHEEo formation kinetics was made at different concentrations of aqueous extract of E. oleracea, of kefir grains (KG) and of brown sugar (BS). Thereafter, macro and microelements of BEHEEo were determined; the rheological and structural characteristics were analyzed using atomic force microscopy (AFM), and anthocyanins dosage in BEHEEo was obtained. The best concentration of BS to form BEHEEo was 40 g/l with 100 ml of EHEEo (12.62±0.16 g), as well as a release of the BEHEEo anthocyanins occurring after 5 min (4.3±0.6 mg/100 g) with maximum peak at 60 min (20.8±0.3). The concentration of calcium iron and magnesium was 0.089, 0.1740 and 0.1808 mg/kg, respectively, indicating the concentration of Zn2+ which was 0.533 mg/kg. The AFM analysis revealed differences in the peaks of roughness depending on the concentration of kefir grains, with presence of Lactobacillus and yeast. The concentration of anthocyanins in BEHEEo two years after the incorporation was 26 mg/100 g. Therefore, it is suggested that the BEHEEo incorporating EHEEo anthocyanins has potential for therapeutic applications in several pathologies necessary for antioxidative processes.Key words: Biofilms, kefir, açaí, Euterpe oleracea Mart., anthocyanins, atomic force microscopy (AFM). INTRODUCTIONKefir is a beverage produced by fermenting substrates such as milk or sugar water by kefir grains (Rodrigues et al., 2005;Laureys and De Vuyst, 2014). The growth and the function of bacteria inside a population are crucial for their survival (Davey and O'toole, 2000). In kefir, there is a predominance of Lactobacillus which has high catabolic capacity and is complemented by yeast with high biosynthetic capacity.When growing kefir in water for more than twenty days, there is the formation of biofilms with therapeutic properties against pathogenic organisms. These biofilms are surfaces with a high rate of structural organization associated with bacterial colonies held together by a polymer secreted by their cells, which is called extracellular polymeric substance (EPS) (Watnick and Kolter, 2000, Donlan, 2002;Zhang et al., 2015). Among many strategies used for the study of biofilms, the one that is more highlighted is the use of the Atomic Force Microscopy (AFM), which allows measurement of the interaction forces between cells or cell-cell interactions (Dufrêne, 2015).One of the substances that have been intensified in recent years are the anthocyanins, due to their protective and healing properties. Anthocyanins have an important role in physiological functions related to human health (Lee et al., 2013). The antioxidant effect of anthocyanins have been known and proven fact. The action mechanism of the anthocyanin is inhibiting the free radicals that promote oxidation. The antioxidant agents capable of binding to the free radicals ...

show abstract

mentioning

confidence: 99%

Study of kefir biofilm associated with hydroethanolic extract of Euterpe oleracea Mart. (aai)

Oliveira¹,

Maciel²,

Florentino³

et al. 2017

Afr. J. Microbiol. Res.

View full text Add to dashboard Cite

show abstract

“…The antioxidant properties of açai have been previously described in the literature (Kuskoski et al, 2006;Kang et al, 2011;Gordon et al, 2012;Inácio et al, 2013). However, although incorporation of açai glycolic extracts into sunscreen emulsion did not increase SPF in vivo, this formulation may be effective as an antioxidant cosmetic product.…”

Section: Sun Protection Factor Study (Spf)mentioning

confidence: 81%

“…is a palm native to the Amazon. Its fruits are of economic importance in the Brazilian state of Pará and contain in addition to essential nutrients, anthocyanins, a class of polyphenols to which antioxidant properties have been attributed (Kuskoski et al, 2006;Kang et al, 2011;Gordon et al, 2012;Inácio et al, 2013). Anthocyanins are the predominant polyphenols and account for more than 90% of açai´s total polyphenolic contents (Pacheco-Palencia et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Development of O/W emulsions containing Euterpe oleracea extract and evaluation of photoprotective efficacy

Daher

Fontes

Rodrigues

et al. 2014

Braz. J. Pharm. Sci.

View full text Add to dashboard Cite

Euterpe oleracea Mart. is a palm tree popularly known as açai, which is primarily found in northern Brazil. The açai's fruits contain anthocyanins, a class of polyphenols to which antioxidant properties have been attributed. The aim of this work was to develop O/W sunscreens emulsions containing açai glycolic extract (AGE) and to evaluate both their physical stability and photoprotective efficacy. Emulsions containing AGE and sunscreens were formulated using different types and concentrations of polymeric surfactant (acrylates/C 10-30 alkyl acrylate crosspolymer and sodium polyacrylate). The influence of two rheology modifiers (polyacrylamide (and) C13-14/isoparaffin (and) Laureth-7 and Carbomer) on the stability was also investigated. Physical stability was evaluated by preliminary and accelerated studies. Emulsions with 1.0% sodium polyacrylate were stable and exhibited non-newtonian pseudoplastic behavior and thixotropy. Photoprotective efficacy was evaluated by in vivo Sun Protection Factor (SPF) and determination of Protection Factor of UVA (PF-UVA). When AGE was added to the sunscreen emulsion, no significant increase in the in vivo SPF value was observed. The emulsion containing AGE showed PF-UVA = 14.97, 1.69 of the SPF/PF-UVA ratio and a critical wavelength value of 378 nm, and may therefore be considered a sunscreen with UVA and UVB protection. Euterpe oleracea Mart. é uma palmeira popularmente conhecida como açaí, encontrada no norte do Brasil. O fruto do açaí apresenta em sua composição antocianinas, uma classe de polifenóis à qual é atribuída propriedade antioxidante. Os objetivos desse trabalho foram desenvolver emulsões fotoprotetoras O/A contendo extrato glicólico de açaí (AGE), avaliar a estabilidade física e avaliar a eficácia fotoprotetora. Emulsões contendo AGE e filtros solares foram formuladas utilizando diferentes tipos e concentrações de tensoativo polimérico (acrilates/C 10-30 alquil acrilato polímero cruzado e polilacrilato sódico). A influência de dois modificadores reológicos (poliacrilamida (e) C13-14/isoparafina (e) Laureth-7 e Carbomer) na estabilidade foi avaliada. A estabilidade física das emulsões foi avaliada por meio de estudos de estabilidade preliminar e acelerada. Emulsões com 1,0% poliacrilato sódico foram estáveis, exibiram comportamento não-newtoniano pseudoplástico e tixotrópico. A eficácia fotoprotetora foi avaliada pelo teste in vivo de Fator de Proteção Solar (FPS) e pela determinação do Fator de Proteção UVA (FP-UVA). Quando adicionado o AGE na emulsão contendo filtros solares, não se observou aumento significativo no valor do FPS. A emulsão contendo o AGE apresentou FP-UVA=14,97, a razão FPS/ FP-UVA = 1,69 e o comprimento de onda crítico igual a 378 nm, podendo ser considerado um protetor solar com proteção UVA e UVB. Unitermos:Emulsão O/A/desenvolvimento. Euterpe oleracea/farmacognosia. Euterpe oleracea/extrato glicólico/eficácia fotoprotetora. Protetores Solares/desenvolvimento. Fator de Proteção Solar.

show abstract

“…Além da absorção da água é possível fazer atribuições da absorção referente aos açúcares contidos na fruta e que podem estar relacionados às bandas em 1160 nm, influência do terceiro sobretom C-H, e a banda em 1780 nm, devido ao primeiro sobretom (Inácio et al, 2013).…”

Section: Comprimento De Onda (Nm) Msc + 1a Derivada Savitzky-golayunclassified

Determinação Simultânea De Antocianinas E Compostos Fenólicos Totais Em Frutos Intactos De Jambo (Eugenia Malaccensis) Empregando a Espectroscopia No Infravermelho Próximo (Nir) E Regressão Por Mínimos Quadrados Parciais (Pls2)

Viegas¹,

Duarte²,

Monteiro³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

View full text Add to dashboard Cite

Total anthocyanin content determination in intact açaí (Euterpe oleracea Mart.) and palmitero-juçara (Euterpe edulis Mart.) fruit using near infrared spectroscopy (NIR) and multivariate calibration

Cited by 76 publications

References 20 publications

Study of kefir biofilm associated with hydroethanolic extract of Euterpe oleracea Mart. (aai)

Study of kefir biofilm associated with hydroethanolic extract of Euterpe oleracea Mart. (aai)

Development of O/W emulsions containing Euterpe oleracea extract and evaluation of photoprotective efficacy

Determinação Simultânea De Antocianinas E Compostos Fenólicos Totais Em Frutos Intactos De Jambo (Eugenia Malaccensis) Empregando a Espectroscopia No Infravermelho Próximo (Nir) E Regressão Por Mínimos Quadrados Parciais (Pls2)

Contact Info

Product

Resources

About