Production of grape juice powder obtained by freeze-drying after concentration by reverse osmosis

Gurak, Poliana Deyse; Cabral, Lourdes Maria Corrêa; Rocha-Leão, Maria Helena M.

doi:10.1590/s1516-89132013005000008

Cited by 29 publications

(19 citation statements)

References 21 publications

(29 reference statements)

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“…The water activity (a w ) of all microencapsulated products ( Figure 1 B) was ranged from 0.310 to 0.450, and all final encapsulated products were noticeably dissimilar from one another, apart from T B (5% GA & 5% MD). T D (10% MD) demonstrated the maximum a w value of 0.450 which was corroborating with previous study carried out by Gurak et al [ 42 ] who found that a w of grape fruit drink microencapsulated by the means of maltodextrin utilizing lyophilization technique was 0.430.…”

Section: Resultssupporting

confidence: 90%

Microencapsulation and the Characterization of Polyherbal Formulation (PHF) Rich in Natural Polyphenolic Compounds

et al. 2018

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Microencapsulation of polyherbal formulation (PHF) extract was carried out by freeze drying method, by employing gum arabic (GA), gelatin (GE), and maltodextrin (MD) with their designated different combinations as encapsulating wall materials. Antioxidant components (i.e., total phenolic contents (TPC), total flavonoids contents (TFC), and total condensed tannins (TCT)), antioxidant activity (i.e., DPPH, β-carotene & ABTS+ assays), moisture contents, water activity (aw), solubility, hygroscopicity, glass transition temperature (Tg), particle size, morphology, in vitroα-amylase and α-glucosidase inhibition and bioavailability ratios of the powders were investigated. Amongst all encapsulated products, TB (5% GA & 5% MD) and TC (10% GA) have proven to be the best treatments with respect to the highest preservation of antioxidant components. These treatments also exhibited higher antioxidant potential by DPPH and β-carotene assays and noteworthy for an ABTS+ assays. Moreover, the aforesaid treatments also demonstrated lower moisture content, aw, particle size and higher solubility, hygroscopicity and glass transition temperature (Tg). All freeze dried samples showed irregular (asymmetrical) microcrystalline structures. Furthermore, TB and TC also illustrated the highest in vitro anti-diabetic potential due to great potency for inhibiting α-amylase and α-glucosidase activities. In the perspective of bioavailability, TA, TB and TC demonstrated the excellent bioavailability ratios (%). Furthermore, the photochemical profiling of ethanolic extract of PHF was also revealed to find out the bioactive compounds.

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Section: Resultssupporting

confidence: 90%

Microencapsulation and the Characterization of Polyherbal Formulation (PHF) Rich in Natural Polyphenolic Compounds

et al. 2018

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“…The MPs (Fig. 2a-c) showed smooth surfaces and irregular, flake-like structures of different sizes, eventually forming aggregates, which was expected because the powders were freeze-dried and ground in mortar (Gurak et al 2013). Figure 2b shows that MD was the encapsulating agent that enabled the formation of capsules with fewer wrinkles on their surfaces, which is in accord with the research of Silva et al (2014).…”

Section: Surface Characteristics Powders and Filmsupporting

confidence: 77%

Microencapsulation of Anthocyanins with Different Wall Materials and Its Application in Active Biodegradable Films

Stoll

Costa

Jablonski

et al. 2015

Food Bioprocess Technol

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Wine grape pomace, a by-product known for its high polyphenolic content, was used as a source of anthocyanins in the acquisition of active biodegradable films, which were produced with anthocyanins encapsulated with different wall materials endowed with film-forming properties. Gum arabic and maltodextrin were used in different proportions during the encapsulation process, and the anthocyanin contents of the powders obtained were quantified by highefficiency liquid chromatography (HPLC), resulting in up to 91.5 % retention. The antioxidant properties, solubility, and color stability of powders were analyzed. Because the microcapsules were added in the highest proportion, it was considered the major component in the formation of films. Microcapsules produced with gum arabic showed higher antioxidant activity as compared to microcapsules produced with maltodextrin. Nevertheless, based on a comparison of the films obtained in this study, the films made with anthocyanins encapsulated with maltodextrin showed better mechanical properties and higher protective effect on oil oxidation, which makes maltodextrin a promising material enabling the formation of films with satisfactory mechanical properties endowed with anthocyanins.

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“…The water activity (aw) of all microencapsulated products ( Figure 1B) was ranged from 0.310 to 0.450, and all final encapsulated products were noticeably dissimilar from one another, apart from TB (5% GA and 5%MD). TD (10% MD) demonstrated the maximum aw value of 0.450 which was corroborating with previous study carried out by Gurak et al [52] who found that aw of grape fruit drink microencapsulated by the means of maltodextrin (MD) utilizing lyophilization technique was 0.430.…”

Section: Physical Characteristics Of Microencapsulated Powder Productssupporting

confidence: 91%

Microencapsulation and Characterization of Natural Polyphenols from PHF Extract

Hussain¹,

Hameed²,

Nazir³

et al. 2018

Preprint

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Microencapsulation of polyherbal formulation (PHF) extract was carried out by freeze drying method, by employing gum arabic (GA), gelatin (GE), and maltodextrin (MD) with their designated different combinations as encapsulating wall materials. Antioxidant components (i.e total phenolic contents (TPC),Total flavonoids contents (TFC), and total condensed contents (TCT)), antioxidant activity (i.e. DPPH, β-carotene & ABTS+ assays), moisture contents, water activity (aw), solubility, hygroscopicity, glass transition temperature (Tg), particle size, morphology, in vitro alpha-amylase and alpha-glucosidase inhibition and bioavailability ratios of the powders were investigated. Amongst all encapsulated products, TB (5% GA and 5% MD) and TC (10% GA) has proven to be the best treatments with respect to the highest preservation of antioxidant components and their antioxidant potential by DPPH and β-carotene assays and noteworthy for an ABTS+ assays, in addition, the aforesaid treatments also demonstrated lower moisture content, aw, particle size and higher solubility, hygroscopicity and glass transition temperature (Tg). All freeze dried samples showed irregular (asymmetrical) microcrystalline structures. Furthermore, TB and TC also illustrated the highest in vitro anti-diabetic potential due to great potency for inhibiting alpha-amylase and alpha-glucosidase activities. In the perspective of bioavailability, TA, TB and TC demonstrated the excellent bioavailability ratios (%).Futhermore, the phytochemo-profiling of ethanolic extract of PHF was also revealed to find out the bioactive compounds.

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Production of grape juice powder obtained by freeze-drying after concentration by reverse osmosis

Abstract: This study aimed to evaluate the freeze-drying process for obtaining grape juice powder by reverse osmosis using 50% grape juice

Cited by 29 publications

References 21 publications

Microencapsulation and the Characterization of Polyherbal Formulation (PHF) Rich in Natural Polyphenolic Compounds

Microencapsulation and the Characterization of Polyherbal Formulation (PHF) Rich in Natural Polyphenolic Compounds

Microencapsulation of Anthocyanins with Different Wall Materials and Its Application in Active Biodegradable Films

Microencapsulation and Characterization of Natural Polyphenols from PHF Extract

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