Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 7 de 7
Filter
Add more filters










Publication year range
1.
PLoS One ; 12(8): e0183935, 2017.
Article in English | MEDLINE | ID: mdl-28846740

ABSTRACT

To the best of our knowledge, this is the first report in the literature concerning the bioactive properties of faveleira products. This work focuses on the physicochemical evaluation of faveleira oil, as well as it investigates the bioactive properties of faveleira seeds, faveleira oil and the press cake obtained during the oilseed processing. The seeds were cold pressed and the following tests were performed: physicochemical characteristics (acidity, peroxide values, moisture and volatile matter, density and viscosity) and fatty acid profile of faveleira oil; total phenolic and flavonoid content of faveleira seed and press cake; antibacterial activity of seed, oil and press cake; and antioxidant activity (DPPH radical scavenging activity, reducing power assay, total antioxidant capacity, superoxide radical scavenging assay and oxygen radical absorbance capacity) of seed, oil and press cake. Our work demonstrated that the faveleira seed oil has low acidity (0.78 ± 0.03% oleic acid) and peroxide value (1.13 ± 0.12 mEq/1000g), associated with the relevant concentration of linoleic acid (53.56%). It was observed that important phenolics (398.89 ± 6.34 mg EAG/100 g), especially flavonoids (29.81 ± 0.71 mg RE/g) remain in the press cake, which indicates that the by-product of the faveleira oilseed production constitutes a rich residual source of bioactive compounds. No bacterial growth inhibition was detected, but all samples including faveleira seeds, press cake, oil and its fractions have potent antioxidant activities, mainly the press cake, with oxygen radical absorbance capacity of 28.39 ± 4.36 µM TE/g. Our results also show that faveleira oil has potential to be used as edible oil and the press cake should be used to contain the most antioxidants from seed.


Subject(s)
Euphorbiaceae/metabolism , Plant Oils/metabolism , Seeds/metabolism , Anti-Bacterial Agents/pharmacology , Antioxidants/pharmacology , Euphorbiaceae/embryology , Fatty Acids/metabolism , Flavonoids/metabolism , Phenols/metabolism , Plant Extracts/metabolism , Plant Extracts/pharmacology
3.
Appl Microbiol Biotechnol ; 100(12): 5547-58, 2016 Jun.
Article in English | MEDLINE | ID: mdl-26980099

ABSTRACT

Osmoporation is an innovative method that can be used with food-grade yeast cells of Saccharomyces cerevisiae as natural encapsulating matrices. This technique overcomes barriers that difficult encapsulation and enables the internalization of fragile bioactive molecules such as fisetin into yeasts. In the present study, we assessed the effects of concentration, osmotic pressure, and temperature on the encapsulation efficiency (EE) and internalized fisetin content (IF). Two different quantification strategies were investigated: direct extraction (DE) without cell washing or freeze-drying steps and indirect extraction (IE) performed after washings with ethanol and freeze-drying. Our results showed that osmoporation improved EE (33 %) and IF (1.199 mg). The best experimental conditions were found by using DE. High-resolution images showed that the yeast cell envelope was preserved during osmoporation at 30 MPa and 84 % of yeast cells remained viable after treatment. Washing cells with organic solvent led to decreased EE (0.65 %) and IF (0.023 mg). This was probably due to either damages caused to yeast cell envelope or fisetin dragged out of cell. Overall, the results demonstrated the adequacy and relevant biotechnological potential of yeasts as encapsulating matrices for hydrophobic compounds. This fresh biotechnological approach has proven to be a promising tool for the production of bioactive-rich food products.


Subject(s)
Biotechnology , Capsules/chemistry , Flavonoids , Saccharomyces cerevisiae/physiology , Calcium Phosphates , Capsules/analysis , Capsules/metabolism , Flavonoids/analysis , Flavonoids/chemistry , Flavonols , Freeze Drying , Hydrophobic and Hydrophilic Interactions , Osmotic Pressure , Saccharomyces cerevisiae/ultrastructure , Temperature
4.
Rev. Inst. Adolfo Lutz ; 71(1): 140-147, jan.-mar. 2012. tab, graf
Article in Portuguese | LILACS, Sec. Est. Saúde SP, SESSP-CTDPROD, Sec. Est. Saúde SP, SESSP-ACVSES, SESSP-IALPROD, Sec. Est. Saúde SP, SESSP-IALACERVO | ID: lil-680444

ABSTRACT

O presente trabalho trata da avaliação sensorial de formulações de iogurte de sabor morango elaboradas com misturas dos leites bubalino e caprino, por meio de análise descritiva quantitativa (ADQ) em associação ao teste de aceitação por escala hedônica. Foram avaliadas 5 amostras contendo diferentes proporções de leite caprino e bubalino: C (100% leite de cabra), 7C3B (70% leite de cabra e 30% leite de búfala), 5C5B (50% leite de cabra e 50% leite de búfala), 3C7B (30% leite de cabra e 70% leite de búfala)e B (100% leite de búfala). Os resultados da ADQ mostraram que o iogurte produzido somente com leite bubalino (B) apresentou-se mais firme e ácido do que os demais. Todas as amostras desenvolvidas pela mistura dos dois tipos de leites obtiveram escores sensoriais de aceitação semelhantes. Esses dados mostraram que a adição do leite de búfala ao leite caprino pode ser uma estratégia eficiente na elaboração de um novo produto com consistência mais adequada e sabor agradável.


Subject(s)
Evaluation Studies as Topic , Food Analysis , Yogurt , Milk , Food Mixtures
5.
Rev. Inst. Adolfo Lutz ; 69(3): 341-345, jul.-set. 2010. tab, graf
Article in English | LILACS, Sec. Est. Saúde SP, SESSP-CTDPROD, Sec. Est. Saúde SP, SESSP-ACVSES, SESSP-IALPROD, Sec. Est. Saúde SP, SESSP-IALACERVO | ID: lil-583074

ABSTRACT

This study evaluated the composition (soluble and total solids, pH, titratable acidity, protein, fat, ash, total reducing sugar), the sensory attributes (appearance, odor, consistency and taste) and the melting behavior of two experimental formulations of caprine ice cream made with two different fat sources, hydrogenated vegetable fat (F1) and a trans-free fat replacer (F2). Soluble and total solids, fat and total reducing sugar of the ice cream samples were statistically different (p<0.05). The sensory results showed high sensory acceptability index (AI) (>70%) for both formulations, with the exception of the flavour attribute of F1 formulation, which had AI equal to 62.041%. In the meltdown test, the F2 group melted faster than the F1 formulation. The results demonstrated that the source of fat used in the ice cream mix directly interferes with the melting characteristics, acceptance rate and physicochemical composition of ice cream.


O presente estudo avaliou a composição (sólidos totais e solúveis, pH, acidez total titulável, proteína, gordura, cinzas, açúcares totais), os atributos sensoriais (aparência, odor, consistência e sabor) e o comportamento, durante o derretimento, de duas formulações experimentais de sorvete caprino elaborados com duas diferentes fontes de gordura, gordura vegetal hidrogenada (F1) e um substituto de gordura livre de ácidos graxos trans (F2). Os teores de sólidos totais e solúveis, gordura e açúcares totais das amostras de sorvete apresentaram diferenças estatisticamente significantes (p<0,05). Os resultados sensoriais mostram elevado índice de aceitação (IA) sensorial (>70%) para ambas as formulações, com exceção do atributo sabor da formulação F1 que apresentou IA de 62,041%. No teste de derretimento, o grupo F2 derreteu mais rápido que a formulação F1. Os resultados demonstraram também que o tipo de gordura usada interfere diretamente nas características de derretimento, nível de aceitação sensorial e composição do sorvete caprino.


Subject(s)
Milk , Ice Cream , Goats
6.
Hig. aliment ; 21(148): 19-23, jan.-fev. 2007.
Article in Portuguese | LILACS | ID: lil-456224

ABSTRACT

Sorvetes são alimentos que incluem ingredientes de grande valor nutricional. Apesar do consumo per capita anual brasileiro ser ainda pouco expressivo em relação a países nórdicos, o país tem potencial para aumentar significativamente o consumo. Neste trabalho, são mostrados aspectos gerais sobre sorvetes, além da tecnologia de fabricação e função dos ingredientes. Também são abordados aspectos relacionados à reologia de sorvetes, através de características próprias estruturais que este alimento apresenta e efeito destes sobre a qualidade do produto final.


Subject(s)
Food Composition , Ice Cream , Nutritive Value
7.
Hig. aliment ; 16(94): 20-25, mar. 2002. tab, graf
Article in Portuguese | LILACS | ID: lil-307831

ABSTRACT

Tem como objetivo avaliar as condições higiênico-sanitárias de mercados e feiras livres situados na cidade do Recife-PE. O instrumento de avaliação utilizado foi a "Ficha de Inspeção de Estabelecimentos, na +rea de Alimentos" determinada pela Resolução SS-196/98, publicada no Diário Oficial do Estado de São Paulo. Os aspectos considerados incluem condições das instalações, equipamentos e utensílios, pessoal, características dos produtos expostos à venda e práticas de manipulação. Foram detectadas falhas em diversos pontos, levando-se a concluir que as condições atuais de grande parte destes tipos de estabelecimentos destinados à comercialização de gêneros alimentícios são precárias. + notória a necessidade de investimentos e treinamento sobre práticas adequadas para manipulção de alimentos, para comerciantes envolvidos e consumidores, de uma forma geral.


Subject(s)
Consumer Product Safety , Health Surveillance , Market Sanitation
SELECTION OF CITATIONS
SEARCH DETAIL
...