José Angel Guerrero Beltrán | Universidad de las Américas - Puebla (original) (raw)

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Papers by José Angel Guerrero Beltrán

Justicia spicigera (muicle) is a plant that has been used from the pre-Hispanic era to contempora... more Justicia spicigera (muicle) is a plant that has been used from the pre-Hispanic era to contemporary times in Mexico. It has been used in the traditional medicine for healing diseases such as dysentery, diabetes, leukemia, and anemia, just to mention some human disorders. It has been used for obtaining indigo dye after making extraction with water to be used for coloring of baskets, crafts, and clothes. The pigments, as a powder, have been studied for use for coloring foods. The dyeing characteristics of the J. spicigera pigments have antioxidant properties due to the flavonoids content. Since this plant has been used for making infusions to people for curing some physical disorders, today J. spicigera is being studied to take advance of its dyeing and antioxidant properties to be used in the food and pharmaceutical industries

The effect of average particle size (APS), type of solvent, and extraction times (ET) on the phys... more The effect of average particle size (APS), type of solvent, and extraction times (ET) on the physicochemical
(moisture, pH, total soluble solids (TSS), titratable acidity, color, water activity (aw), density), and phytochemical
(total anthocyanins and phenols content)propertiesin Hibiscus sabdariffa (Roselle) calyces was analyzed. The
phytochemical properties evaluation was performed using a factorial design 2×3×3: two APS (median diameters,
d50, of 0.55 ± 0.016 (fine powder) and 0.97 ± 0.034 (ground powder) mm), three solvents (water, 2% citric acid,
and 50% ethanol) and three ET (30, 45, and 60 min). All extractions were performed at 50 °C. The APS was
determined by sieve analysis using Tyler sieves of different number of mesh. Regarding physicochemical
properties, no significant differences (p > 0.05) were observed in moisture content, pH, and titratable acidity;
however, the 0.55 mm fine powder (FP) of Hibiscus calyces had lower aw(0.37±0.01) and higher TSS
(5.53±0.05%) than the 0.97 mm ground powder (GP). The extracts obtained fromGP showed a deeper red color
than those of FP. The best combination of independent variables, in order to obtain the highest concentration of
anthocyanins (451.4±28.1 mg/100 g d.s.) and total phenols (2016.2 ± 159.8 mg/100 g d.s.) were APS of 0.55 mm,
50% ethanol, and ETof 30 min.
Keywords: Hibiscus sabdariffa, average particle size, phytochemicals, anthocyanins, phenolic compounds

Justicia spicigera (muicle) is a plant that has been used from the pre-Hispanic era to contempora... more Justicia spicigera (muicle) is a plant that has been used from the pre-Hispanic era to contemporary times in Mexico. It has been used in the traditional medicine for healing diseases such as dysentery, diabetes, leukemia, and anemia, just to mention some human disorders. It has been used for obtaining indigo dye after making extraction with water to be used for coloring of baskets, crafts, and clothes. The pigments, as a powder, have been studied for use for coloring foods. The dyeing characteristics of the J. spicigera pigments have antioxidant properties due to the flavonoids content. Since this plant has been used for making infusions to people for curing some physical disorders, today J. spicigera is being studied to take advance of its dyeing and antioxidant properties to be used in the food and pharmaceutical industries

The effect of average particle size (APS), type of solvent, and extraction times (ET) on the phys... more The effect of average particle size (APS), type of solvent, and extraction times (ET) on the physicochemical
(moisture, pH, total soluble solids (TSS), titratable acidity, color, water activity (aw), density), and phytochemical
(total anthocyanins and phenols content)propertiesin Hibiscus sabdariffa (Roselle) calyces was analyzed. The
phytochemical properties evaluation was performed using a factorial design 2×3×3: two APS (median diameters,
d50, of 0.55 ± 0.016 (fine powder) and 0.97 ± 0.034 (ground powder) mm), three solvents (water, 2% citric acid,
and 50% ethanol) and three ET (30, 45, and 60 min). All extractions were performed at 50 °C. The APS was
determined by sieve analysis using Tyler sieves of different number of mesh. Regarding physicochemical
properties, no significant differences (p > 0.05) were observed in moisture content, pH, and titratable acidity;
however, the 0.55 mm fine powder (FP) of Hibiscus calyces had lower aw(0.37±0.01) and higher TSS
(5.53±0.05%) than the 0.97 mm ground powder (GP). The extracts obtained fromGP showed a deeper red color
than those of FP. The best combination of independent variables, in order to obtain the highest concentration of
anthocyanins (451.4±28.1 mg/100 g d.s.) and total phenols (2016.2 ± 159.8 mg/100 g d.s.) were APS of 0.55 mm,
50% ethanol, and ETof 30 min.
Keywords: Hibiscus sabdariffa, average particle size, phytochemicals, anthocyanins, phenolic compounds