|
|
|
|
|
| Ferreira,Daniele de Freitas; Nora,Flávia Michelon Dalla; Lucas,Bruna Nichelle; Menezes,Cristiano Ragagnin de; Cichoski,Alexandre José; Giacomelli,Sandro Rogério; Wagner,Roger; Barin,Juliano Smanioto. |
| ABSTRACT: Essential oil extraction is commonly carried out by using the hydrodistillation method, which is described in official compendia of food quality control and medicinal plants. Despite the widespread use of this method, few studies have evaluated the effect of the atmosphere change during extraction on the composition and antioxidant activity of essentials oils. Therefore, a study of oxygen introduction influence during the extraction of essential oils from basil, lemongrass and lemon by hydrodistillation was performed. Total amount of oxygenated compounds (e.g., linalool, camphor, α-terpineol, neral, geranial, eugenol and α-muurolol) increased for all essential oils extracted under oxygen flow. Antioxidant activity evaluated by using the ORAC... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant activity; Chromatography; ORAC; Volatile oil. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000800752 |
| |
|
|
| Boeira,Caroline Pagnossim; Piovesan,Natiéli; Soquetta,Marcela Bromberger; Flores,Déborah Cristina Barcelos; Lucas,Bruna Nichelle; Barin,Juliano Smanioto; Rosa,Claudia Severo da; Terra,Nelcindo Nascimento. |
| ABSTRACT: The aim of this study was to evaluate the effect of extraction conditions on bioactive compounds, as well as on antioxidant activity, and the antimicrobial activity of the extracts with the highest antioxidant characteristics. The extracts were obtained by conventional method and ultrasound-assisted extraction at various temperatures (20°C, 40°C and 60°C). Total phenolics, total flavonoids, antimicrobial activity and antioxidant activity were quantified by the methods of DPPH, FRAP, and ORAC, respectively. The conventional extraction method and ultrasound method influenced the phenolic content at all the tested temperatures. Flavonoids were not influenced by extraction methods. The antioxidant activity (DPPH) was highest in the ultrasonic method... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ultrasound; Bioactive compounds; Natural antioxidant; Achyrocline satureioides. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600201 |
| |
|
|
| Batista,Vanessa Sabrina Fagundes; Nunes,Graciele Lorenzoni; Viegas,Gabriela Ilha; Lucas,Bruna Nichelle; Bochi,Vivian Caetano; Emanuelli,Tatiana; Barin,Juliano Smanioto; Menezes,Cristiano Ragagnin de; Rosa,Claudia Severo da. |
| ABSTRACT: This study aimed to extract isoflavones from soybean molasses with different solvents, furthermore, the selected extract, which showed overall desirable characteristics was selected to evaluate the potentials of different encapsulating agents. The encapsulating agents employed for the study included 18% Maltodextrin DE20 (T1), 18% Hi-maize (T2), and a mixture of equal proportions of 9% Maltodextrin DE20 and 9% of Hi-maize (T3). Solvents such as 80% ethanol and methanol, and grain alcohol in varying different concentrations of 50 and 80% were used for the studies. The best solvent for the extraction of phenolics and total isoflavones was 50% cereal alcohol, this extract also presented higher antioxidant activity. Evaluation of the encapsulating... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spray-drying; Antioxidant; Phenolics; Isoflavones. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300751 |
| |
|
|
| Boeira,Caroline Pagnossim; Piovesan,Natiéli; Soquetta,Marcela Bromberger; Flores,Déborah Cristina Barcelos; Lucas,Bruna Nichelle; Rosa,Claudia Severo da; Terra,Nelcindo Nascimento. |
| ABSTRACT: The aim of this work was to determine the best extraction condition of bioactive compounds from lemongrass (Cymbopogon citratus), using the conventional method and ultrasonic assisted extraction, varying the temperature, in order to evaluate the antioxidant activity and the antimicrobial activity of the extract with higher antioxidant power in fresh chicken sausages during the storage period. The extracts were obtained by the conventional method (solvent extraction) and by ultrasound assisted extraction, varying the temperature (20°C, 40°C and 60°C). Phenolic compounds, total flavonoids and antioxidant activity were measured by the DPPH, FRAP, ORAC methods. Conventional extraction and ultrasound methods influenced the phenolic and total flavonoid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cymbopogon citratus; Natural antioxidants; Ultrasound; Chicken sausage. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001100751 |
| |
|
|
|
