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Gallic acid microparticles produced by spray chilling technique: Production and characterization

In this work, we evaluated the implementation of spray chilling technique to produce solid lipid microparticles (SLMs) containing gallic acid as a model phenolic compound, using blends of soybean oil (SO) with fully hydrogenated soybean oil (FHSO) as wall materials. Gallic acid aqueous solution was... Full description

Contained in: Food Science and Technology - lwt. Lebensmittel-Wissenschaft und -Technologie Vol. 65 (2016), p. 79-87
Journal Title: Food Science and Technology - lwt. Lebensmittel-Wissenschaft und -Technologie
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Links: Additional Link (dx.doi.org)
Additional Keywords: ELEKTRONENMIKROSKOPIE
EMULSION
EMULSIONSSTROEMUNG
FETT
KUGELFORM
MIKROTEILCHEN
PHENOLVERBINDUNG
SOJAOEL
SPRITZEN
STOFFGEMISCH
VERKAPSELN
WAESSRIGE-LOESUNG
DOI: 10.1016/j.lwt.2015.07.052
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 9 Seiten, Quellen
ID (e.g. DOI, URN): 10.1016/j.lwt.2015.07.052
PPN (Catalogue-ID): WTI00036892X
Note: WTI TEMA DB
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520 |a In this work, we evaluated the implementation of spray chilling technique to produce solid lipid microparticles (SLMs) containing gallic acid as a model phenolic compound, using blends of soybean oil (SO) with fully hydrogenated soybean oil (FHSO) as wall materials. Gallic acid aqueous solution was dispersed through lipid blends by the preparation of water-in-oil (W/O) emulsions stabilized by the emulsifier PGPR (polyglycerol polyricinoleate). The conditions of emulsion preparation (concentration of emulsifier, speed and time of stirring) were established by evaluating their kinetic stability. The FHSO/SO proportion and the W/O ratio have been varied for the different formulations. Lipid blends and emulsions flow curves showed Newtonian behavior at 79 °C (preparation temperature). Microparticles with higher FHSO concentrations presented increased encapsulation efficiencies (from 54% to 101%) due to lower gallic acid superficial concentrations. Mean diameters ranged from about 24 µm to 36 µm and were slightly affected by differences in formulations. Scanning electron microscopy revealed microparticles with spherical shape and smooth surface covered with fat crystals. Hence, the use of spray chilling technique may be a good option for the production of SLMs loaded with phenolics. [Copyright Elsevier B.V. Reproduced with permission.] 
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