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Developing novel one-step processes for obtaining food-grade O/W emulsions from pressurized fluid extracts: processes description, state of the art and perspectives Ciênc. Tecnol. Aliment.
SANTOS,Diego Tresinari; MEIRELES,Maria Angela de Almeida.
Abstract In this work, a novel on-line process for production of food-grade emulsions containing oily extracts, i.e. oil-in-water (O/W) emulsions, in only one step is presented. This process has been called ESFE, Emulsions from Supercritical Fluid Extraction. With this process, emulsions containing supercritical fluid extracts can be obtained directly from plant materials. The aim in the conception of this process is to propose a new rapid way to obtain emulsions from supercritical fluid extracts. Nowadays the conventional emulsion formulation method is a two-step procedure, i.e. first supercritical fluid extraction for obtaining an extract; secondly emulsion formulation using another device. Other variation of the process was tested and successfully...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Keywords: supercritical fluids; Food bioactive compounds; Hyphenated processes; Emulsification..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000400579
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Partial-hydrothermal hydrolysis is an effective way to recover bioactives from turmeric wastes Ciênc. Tecnol. Aliment.
SANTANA,Ádina Lima de; OSORIO-TOBÓN,Juan Felipe; CÁRDENAS-TORO,Fiorella Patricia; STEEL,Caroline Joy; MEIRELES,Maria Angela de Almeida.
Abstract Partial-hydrothermal hydrolysis using pressurized hot water was applied in waste turmeric, derived from extraction processes that employed supercritical and pressurized fluids, as a sustainable alternative for the recovery of bioactive constituents from this material. The reaction products consisted of a liquid extract of fermentable sugars and a solid fraction, which is a mixed biopolymer with relevant composition in terms of starch and antioxidant constituents. The effects of reaction conditions on resulting products were investigated. Economic evaluation was also performed showing that application of partial-hydrothermal hydrolysis from a residual feedstock is feasible in terms of low spend of energy and materials.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biowastes; Carbohydrates; Partial hydrolysis; Phenolic compounds.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000200280
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Identification and quantification of genipin and geniposide from Genipa americana L. by HPLC-DAD using a fused-core column Ciênc. Tecnol. Aliment.
NÁTHIA-NEVES,Grazielle; NOGUEIRA,Gislaine Chystina; VARDANEGA,Renata; MEIRELES,Maria Angela de Almeida.
Abstract In this work, it was developed a fast, simple and selective method for quantification of genipin and geniposide from unripe fruits of genipap, which are known as natural colorants, blue and yellow, respectively. The compounds separation was performed in a fused-core C18 column using as mobile phase water (A) and acetonitrile (B) both acidified with 0.1% formic acid, with the following gradient: 0 min, 99% A; 9 min, 75% A; 10 min, 99% A and 13 min, 99% A. The temperature and flow rate that allowed the best chromatographic performance were 35 °C and 1.5 mL/min, respectively, resulting a total run time of 13 min, including column clean-up and re-equilibration. This short analysis time represents an advantage compared to the methods reported in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Blue natural colorant; Method validation; Iridoids.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000500116
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Construction of a supercritical fluid extraction (SFE) equipment: validation using annatto and fennel and extract analysis by thin layer chromatography coupled to image Ciênc. Tecnol. Aliment.
JOHNER,Júlio Cezar Flores; MEIRELES,Maria Angela de Almeida.
Abstract The present work describes setting up a laboratory unit for supercritical fluid extraction. In addition to its construction, a survey of cost was done to compare the cost of the homemade unit with that of commercial units. The equipment was validated using an extraction of annatto seeds’ oil, and the extraction and fractionation of fennel oil were used to validate the two separators; for both systems, the solvent was carbon dioxide. The chemical profiles of annatto and fennel extracts were assessed using thin layer chromatography; the images of the chromatographic plates were processed using the free ImageJ software. The cost survey showed that the homemade equipment has a very low cost (~US$ 16,000) compared to commercial equipment. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Supercritical fluid extraction; Homemade extraction unit; Annatto; Fennel; Thin layer chromatography; ImageJ software.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000200210
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