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Abstract:

Starch-enriched fractions of amaranth grain were obtained from planetary ball milling and subsequently studied for particle size reduction, hydration properties, and crystallinity loss. Wide-angle X-ray scattering (WAXS) was used to evaluate the crystalline of starch-enriched fractions, using an iterative smoothing algorithm to estimate amorphous background scattering. This methodology was then used to determine initial crystallinity and monitor crystallinity loss during this process. The attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) showed that ball-milling treatment significantly decreased (p < 0.05) the intensity ratios of the bands at 1,039 and 1,014 cm-1 corresponding to the crystalline/amorphous part of starch structure. Starch crystallinity degree decreased by ball milling due to starch amorphization during this process. An excellent correlation was found between crystallinity degree obtained by WAXS and ATR-FTIR data for the whole ball-milled-analyzed samples. The energy required for size reduction was satisfactorily explained using a generalized grinding equation. A decrease of span and median diameter (D50) indicated sample homogenization during ball milling. Water absorption index and water solubility increased with crystallinity loss during process. The flour produced at the higher milling energy (6.52 kJ/g), with a mean size of 68 ± 1 μm, showed a low crystallinity degree (<5 %), and high water absorption and solubility indexes in comparison to the starch-enriched fraction sample. Particle activation provided by ball-milling process can offer chances for starch application such as sorbent agent in food or pharmaceutical industries. © 2014 Springer Science+Business Media New York.

Registro:

Documento: Artículo
Título:Ball Milling of Amaranth Starch-Enriched Fraction. Changes on Particle Size, Starch Crystallinity, and Functionality as a Function of Milling Energy
Autor:Roa, D.F.; Santagapita, P.R.; Buera, M.P.; Tolaba, M.P.
Filiación:Industry Department, University of Buenos Aires (FCEyN-UBA), Buenos Aires, Argentina
Organic Chemistry Department, University of Buenos Aires (FCEyN-UBA), Buenos Aires, Argentina
National Council of Scientific and Technical Research (CONICET), Buenos Aires, Argentina
Universidad de Buenos Aires, Intendente Güiraldes 2160-Ciudad Universitaria, C1428EGA Ciudad Autónoma de Buenos Aires, Argentina
Palabras clave:Amaranth starch; Crystallinity; Energy function; FT-IR; Planetary ball milling; Technological and physical properties; Fourier transform infrared spectroscopy; Iterative methods; Milling (machining); Particle size; Solubility; Starch; Amaranth starches; Crystallinities; Energy functions; FT-IR; Planetary ball milling; Ball milling; Amaranthus caudatus
Año:2014
Volumen:7
Número:9
Página de inicio:2723
Página de fin:2731
DOI: http://dx.doi.org/10.1007/s11947-014-1283-0
Título revista:Food and Bioprocess Technology
Título revista abreviado:Food. Bioprocess Technol.
ISSN:19355130
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19355130_v7_n9_p2723_Roa

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Citas:

---------- APA ----------
Roa, D.F., Santagapita, P.R., Buera, M.P. & Tolaba, M.P. (2014) . Ball Milling of Amaranth Starch-Enriched Fraction. Changes on Particle Size, Starch Crystallinity, and Functionality as a Function of Milling Energy. Food and Bioprocess Technology, 7(9), 2723-2731.
http://dx.doi.org/10.1007/s11947-014-1283-0
---------- CHICAGO ----------
Roa, D.F., Santagapita, P.R., Buera, M.P., Tolaba, M.P. "Ball Milling of Amaranth Starch-Enriched Fraction. Changes on Particle Size, Starch Crystallinity, and Functionality as a Function of Milling Energy" . Food and Bioprocess Technology 7, no. 9 (2014) : 2723-2731.
http://dx.doi.org/10.1007/s11947-014-1283-0
---------- MLA ----------
Roa, D.F., Santagapita, P.R., Buera, M.P., Tolaba, M.P. "Ball Milling of Amaranth Starch-Enriched Fraction. Changes on Particle Size, Starch Crystallinity, and Functionality as a Function of Milling Energy" . Food and Bioprocess Technology, vol. 7, no. 9, 2014, pp. 2723-2731.
http://dx.doi.org/10.1007/s11947-014-1283-0
---------- VANCOUVER ----------
Roa, D.F., Santagapita, P.R., Buera, M.P., Tolaba, M.P. Ball Milling of Amaranth Starch-Enriched Fraction. Changes on Particle Size, Starch Crystallinity, and Functionality as a Function of Milling Energy. Food. Bioprocess Technol. 2014;7(9):2723-2731.
http://dx.doi.org/10.1007/s11947-014-1283-0