In this work, the morphological, thermal, and crystalline properties of starches isolated from two amaranth cultivars, Amaranthus cruentus (ACr) and Amaranthus caudatus (ACa); the viscoelastic properties of their pastes and gels, through oscillatory and creep‐recovery tests and the adjustment to the Maxwell mechanical model, were studied. Both starches presented type A crystalline patterns with high crystallinity degree (CD), 41.84% for ACr and 40.70% for ACa, associated to their low apparent amylose content (AAM) (1.06 g/100 g for ACr and 7.39 g/100 g for ACa). The ACr starch showed the highest values for temperature of gelatinization (Tg) (74.50°C) and ΔH (16.15 W/g). Amaranth gelatinized starches exhibited rheological behavior that corresponds to concentrated macromolecular solutions for ACr while ACa starches showed a gel‐type behavior. The ACa gels behaved as a viscoelastic solid with smaller values of instantaneous compliance (0.006 Pa−1 < J0 < 0.0002 Pa−1), retarded compliances (0.0005 Pa−1 < J1 < 0.000006 Pa−1; 0.0016 Pa−1 < J2 < 0.00008 Pa−1) and higher values of newtonian viscosities (33.4 × 105 Pa · s ≤ η0 ≤ 357.1 × 105Pa · s) than ACr, which facilitated their later structural recovery (75.8% ≤ final recovery ≤ 85.1%). The gels exhibited a small contribution of viscous flow's compliance (t/η0) brought about by the dashpot of the Maxwell's simple element, while in the ACr pastes, this element acquired importance. The Maxwell model of six‐parameters adjusted satisfactorily (R2 ≥ 0.986; RSS ≤ 3 × 10−4) the results of creep curves.
Los bosques nativos representan una fuente importante de bienes y servicios que son empleados, tanto para consumo humano como animal por sus habitantes. En Santiago del Estero, Argentina, estos bosques ofrecen, entre otros productos, frutos de especies arbóreas, con importancia económica para quienes los aprovechan. El objetivo del estudio fue indagar acerca de las ventajas y limitaciones con las que cuentan los productores en el desempeño productivo y comercial de productos derivados de frutos del bosque nativo. Se analizaron tres asociaciones compuestas por un promedio de 30 integrantes cada una y relacionadas a la cosecha, secado, molienda y tamizado de frutos de <em>Prosopis alba, Prosopis nigra, Ziziphus mistol </em>y<em> Geoffroea decorticans</em>. Los resultados apuntan a limitaciones relacionadas a aspectos, principalmente, ambientales, geográficos, económicos, institucionales, tecnológicos y también sociales. Este<strong> </strong>trabajo aporta beneficio para las organizaciones y resalta los saberes y tradiciones en el tema. Se percibe la necesidad de alianzas estratégicas entre asociaciones y otros organismos para la búsqueda de nichos de mercado.
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