PRODUCIÓN INTELECTUAL DE COMUNIDAD CIENTIFICAPRODUCIÓN INTELECTUAL DE COMUNIDAD CIENTIFICA DE LA UNAJMAhttps://hdl.handle.net/20.500.14168/112024-03-29T06:10:05Z2024-03-29T06:10:05ZMultimetal removal in aqueous medium using a potato starch/nopal mucilage copolymer: A study of adsorption kinetics and isothermsChoque Quispe, DavidLigarda Samanez, Carlos AlbertoChoque Quispe, YudithSolano Reynoso, Aydeé M.Ramos Pacheco, Betsy S.Zamalloa Puma, Miluzka M.Álvarez López, Genaro JulioZamalloa Puma, AlanChoque Quispe, KatyaAlzamora Flores, Humbertohttps://hdl.handle.net/20.500.14168/8112024-01-09T08:00:11Z2023-01-01T00:00:00ZMultimetal removal in aqueous medium using a potato starch/nopal mucilage copolymer: A study of adsorption kinetics and isotherms
Choque Quispe, David; Ligarda Samanez, Carlos Alberto; Choque Quispe, Yudith; Solano Reynoso, Aydeé M.; Ramos Pacheco, Betsy S.; Zamalloa Puma, Miluzka M.; Álvarez López, Genaro Julio; Zamalloa Puma, Alan; Choque Quispe, Katya; Alzamora Flores, Humberto
In reducing heavy metals from water for direct or indirect consumption, various synthetic materials have been
used; there is a tendency to use natural, biodegradable, and environmentally friendly materials. The aim was to
elaborate copolymers with native potato starch and cactus mucilage and evaluate water’s multimetal removal
capacity. The copolymer was characterized, and the kinetics and adsorption isotherms were evaluated. The
copolymers presented high solubility for nopal mucilage levels of 5% w/w, with particle size in aqueous solution
less than 422.83 nm, zero charge point around pH 5.5, and potential ζ between ����� 16.72 and ����� 29.80 mV; FTIR
analysis showed the predominance of anionic groups with chelating capacity. Multimetal adsorption was from
102.20 to 151.43 mg/g, with affinity in the order Pb > As > Al > Hg > Cr, being higher at pH 6 (p-value<0.05).
Kinetic data were fitted to the PSFO, PSSO, and Elovich models with R2>0.994, X2<16.098, ARE<34.038, and
random residual dispersion, indicating a chemisorption process. The adsorption isotherms were adjusted to the
Langmuir, Freundlich, and Redlich-Peterson models with R2>0.863, whose parameters are related to the ionic
radius of the metals, with favorable adsorption and a heterogeneous surface of the copolymer. The mean
adsorption energy was found between 0.05 and 0.23 kJ/mol. The use of native potato starch and cactus mucilage
allows the formulation of copolymers with high multimetal adsorption potential in aqueous systems.
2023-01-01T00:00:00ZBioactive compounds and sensory analysis of freeze-dried prickly pear fruits from an inter andean valley in PeruChoque Quispe, DavidLigarda Samanez, Carlos AlbertoHuamán Rosales, Edith R.Aguirre Landa, John PeterAgreda Cerna, Henrry WilfredoZamalloa Puma, Miluzka M.Álvarez López, Genaro JulioBarboza Palomino, Gloria I.Alzamora Flores, HumbertoGamarra Villanueva, Wilfredohttps://hdl.handle.net/20.500.14168/8102024-01-09T08:00:10Z2023-01-01T00:00:00ZBioactive compounds and sensory analysis of freeze-dried prickly pear fruits from an inter andean valley in Peru
Choque Quispe, David; Ligarda Samanez, Carlos Alberto; Huamán Rosales, Edith R.; Aguirre Landa, John Peter; Agreda Cerna, Henrry Wilfredo; Zamalloa Puma, Miluzka M.; Álvarez López, Genaro Julio; Barboza Palomino, Gloria I.; Alzamora Flores, Humberto; Gamarra Villanueva, Wilfredo
Prickly pear fruits are seasonal and have shades ranging from pale green to deep purple.
Their pigments are associated with bioactive compounds, being sensitive to thermal transformation
processes for their conservation. The objective of this research was to evaluate the bioactive
compounds and the sensory analysis of freeze-dried prickly pear fruits from an inter-Andean valley
in Peru. The prickly pear fruits of the morada, anaranjada, and blanca ecotypes came from an
inter-Andean valley in Peru at 2972 m altitude. The sliced fruits were freeze-dried at 40 C and
0.25 mTorr, and the total polyphenol content (TPC), vitamin C, and antioxidant activity (AA) were
determined, as well as the color L* a* b*, color index (CI*), FTIR spectra, and mineral content. In the
same way, sensory analysis of preferences with nine scales was applied. It was observed that in the
freeze-dried fruits, TPC, AA, and vitamin C increased significantly (p-value < 0.05), and their corresponding
functional groups increased in intensity in their corresponding FTIR spectra; furthermore,
trace elements such as Cu, Fe, Se, Zn, Si, and Mn were identified. On the other hand, freeze-drying
provided deeper colors to the fruits, which most panelists said they “very much liked” during the
sensory analysis, although the texture was not very well accepted, with most panelists reporting being
“indifferent” towards it. The freeze-drying technique allows the bioactive and sensory attributes of
prickly pear fruits from inter-Andean valleys to be preserved, making it a potential fruit for export
and conservation due to its seasonality.
2023-01-01T00:00:00ZStorage conditions and adsorption thermodynamic Propertiesfor purple CornChoque Quispe, DavidRamos Pacheco, Betsy S.Choque Quispe, YudithAguilar Salazar, Rolando F.Mojo Quisani, AntonietaCalla Florez, MiriamSolano Reynoso, Aydeé M.Zamalloa Puma, Miluzka M.Palomino Malpartida, Ybar G.Alcarraz Alfaro, TarcilaZamalloa Puma, Alanhttps://hdl.handle.net/20.500.14168/7722023-04-21T08:00:11Z2022-01-01T00:00:00ZStorage conditions and adsorption thermodynamic Propertiesfor purple Corn
Choque Quispe, David; Ramos Pacheco, Betsy S.; Choque Quispe, Yudith; Aguilar Salazar, Rolando F.; Mojo Quisani, Antonieta; Calla Florez, Miriam; Solano Reynoso, Aydeé M.; Zamalloa Puma, Miluzka M.; Palomino Malpartida, Ybar G.; Alcarraz Alfaro, Tarcila; Zamalloa Puma, Alan
Adsorption isotherms provide insight into the thermodynamic properties governed by food
storage conditions. Adsorption isotherms of purple corn of the Canteño variety were evaluated at 18,
25, and 30 C, for the equilibrium relative humidity (ERH) range between 0.065 and 0.95. The equilibrium
moisture (Xe) was determined by the continuous weight-change method. Seven mathematical
models of isotherms were modeled, using the coefficient of determination R2, mean absolute error
(MAE), and estimated standard error (ESE) as the convergence criterion. Thermodynamic parameters
such as isosteric heat (qst), Gibbs Free Energy (DG), differential entropy (DS), activation energy (Ea),
and compliance with the isokinetic law were evaluated. It was observed that the adsorption isotherms
presented cross-linking around 75% ERH and 17% Xe, suggesting adequate storage conditions at
these values. The GAB and Halsey models reported better fit (R2 > 97%, MAE < 10%, ESE < 0.014
and random residual dispersion). The reduction of Xe from 17 to 7%, increases qst, from 7.7022 to
0.0165 kJ/g, while DG decreases considerably with the increase in Xe, presenting non-spontaneous
endergonic behavior, and linear relationship with DS, evidencing compliance with the isokinetic
theory, governed by qst. Ea showed that more energy is required to remove water molecules from
the upper layers bound to the monolayer, evaluated using CGAB. The models predicted the storage
conditions, and the thermodynamic parameters show the structural stability of the purple corn grains
of the Canteño variety during storage.
2022-01-01T00:00:00ZPreliminary characterization of a spray-dried hydrocolloid from a high andean algae (nostoc sphaericum)Choque Quispe, DavidMojo Quisani, AntonietaLigarda Samanez, Carlos A.Calla Florez, MiriamRamos Pacheco, Betsy S.Zamalloa Puma, Lourdes MagalyPeralta Guevara, Diego E.Solano Reynoso, Aydeé M.Choque Quispe, YudithZamalloa Puma, AlanPalomino Malpartida, Ybar G.Medina Quiquin, Leidy D.Kari Ferro, Aydeéhttps://hdl.handle.net/20.500.14168/7712023-04-21T08:00:10Z2022-01-01T00:00:00ZPreliminary characterization of a spray-dried hydrocolloid from a high andean algae (nostoc sphaericum)
Choque Quispe, David; Mojo Quisani, Antonieta; Ligarda Samanez, Carlos A.; Calla Florez, Miriam; Ramos Pacheco, Betsy S.; Zamalloa Puma, Lourdes Magaly; Peralta Guevara, Diego E.; Solano Reynoso, Aydeé M.; Choque Quispe, Yudith; Zamalloa Puma, Alan; Palomino Malpartida, Ybar G.; Medina Quiquin, Leidy D.; Kari Ferro, Aydeé
The search for new natural sources of hydrocolloids with stabilizing, thickening, and good
binding capacity, from raw materials that are environmentally friendly and that contribute to the
circular economy is a challenge for the food industry. The aim of the study was the preliminary
characterization of a spray-dried hydrocolloid from high Andean algae Nostoc sphaericum. Four
ecotypes of algae from Peruvian high Andean lagoons located above 4000 m were considered. The
samples were collected in the period March–April 2021 and were subjected to a spray drying process
in an aqueous medium. The characterization showed that the dehydrated nostoc ecotypes presented
high protein and carbohydrate content, making it a potential material for direct use as a functional
food for humans. The spray-dried product presented good stability for its use as a hydrocolloid,
with zeta potential values ( ), around 30 mV, evidencing the presence of -CO-, -OH, -COO-, and
-CH groups, characteristic of polysaccharides, representing 40% of total organic carbon on average,
giving it low water activity values and particle size at the nanometric level. Major minerals such
as Ca (>277 mg/100 g), Mg (>19.7 mg/100 g), and Fe (>7.7 mg/100 g) were reported. Spray-dried
nostoc is a hydrocolloid material with high potential for the food industry, with good nutritional
content and techno-functional behavior.
2022-01-01T00:00:00Z