Molecularly Imprinted Polymer for Selective Extraction of Tartaric Acid

Ghasempour, Zahra; Alizadeh-Khaledabad, Mohammad; Vardast, Mohammad Reza; Rezazad-Bari, Mahmoud

doi:10.1134/s1061934818090046

Cited by 4 publications

(5 citation statements)

References 21 publications

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“…Aunque ocurre en otras plantas, el ácido tartárico es asociado a la uva porque está presente en grandes cantidades, cuando comparado a otros ácidos orgánicos de las uvas [9], este compuesto puede ser identificado por el singulete a 4,45 ppm. El ácido málico fue identificado por el doble de dobles (dd) en 2,75 y 2,80 ppm, mientras que el ácido cítrico fue identificado por el dd a 2,60 y 2,66 ppm.…”

Section: Análisis Rmnunclassified

Análisis metabolómica del zumo de uva brasileño mediante resonancia magnética nuclear de hidrógeno

Paula Drehmer,

Rodrigues Spinelli,

Moura

2023

BIO Web Conf.

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Resumen La determinación de las propiedades químicas del zumo de uva es una forma de promover la difusión y valorización de este producto, considerando su importancia socioeconómica para los países que lo producen, siendo buscado como fuente de alimentación natural a nivel mundial. En este sentido, la Resonancia Magnética Nuclear (RMN) permite la identificación de compuestos, generando un perfil metabólico, y se ha aplicado para probar autenticidad, origen geográfico y añada. En ese contexto, este estudio buscó identificar patrones de similaridad entre zumos de uva producidos en el estado de Rio Grande do Sul/Brasil, utilizando 1H RMN y quimiometría. Se analizaron 42 muestras, preparadas diluyendo 20 μL de muestra en 580 μL de agua deuterada (D2O) y, posteriormente, se realizó el análisis 1H RMN. A partir de los espectros obtenidos se identificaron ácidos málico, tartárico y cítrico, alanina, además de α y β glucosa y fructosa. Además, la intensidad de las señales referentes al etanol y al ácido acético podría estar relacionada con la fermentación de las muestras. Por lo tanto, se aplicó el análisis quimiométrico Análisis por Componentes Principales (ACP) para ayudar a crear un estándar para separar y clasificar las muestras por región y cosecha. En resumen, esta es la primera investigación que informa patrones de metabolitos de zumos de uva de la región de la Serra Gaúcha, que es la mayor productora de la viña y el vino de Brasil. Esto puede aplicarse para la denominación de origen y/o identificación de fraudes en este producto.

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Section: Análisis Rmnunclassified

Análisis metabolómica del zumo de uva brasileño mediante resonancia magnética nuclear de hidrógeno

Paula Drehmer,

Rodrigues Spinelli,

Moura

2023

BIO Web Conf.

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“…Fan et al [57] prepared non-covalent and semicovalently molecularly printed membrane with good adsorption selectivity for genistein. As shown in Figure 4c, the template is combined with functional monomers through covalent bonds [50] Copyright 2018, Pleiades publishing; (b) Adapted with permission. [57] Copyright 2020, Elsevier; (c) Adapted with permission.…”

Section: Semi-covalent Molecularly Imprintedmentioning

confidence: 99%

“…[ 49 ] These include mainly hydrogen bonding, electrostatic force, charge transfer, hydrophobic interaction, van der Waals force, metal chelation, π – π interactions, and dipole interaction. [ 50 ] This type of imprinted molecular polymer recognition also depends on non‐covalent bonding forces, and its preparation and recognition process are affected by solvent malformations. Polar solvents are easy to destroy the non‐covalent bonds between imprinted molecules and functional monomers, so non‐polar solvents or weak polar solvents were used in the preparation process.…”

Section: Classification Of Mipsmentioning

confidence: 99%

Section: Classification Of Mipsmentioning

confidence: 99%

“…Instructions for the preparation of MIPs by a) non-covalent bond, b) covalent bond, and c) semi-covalent bond. (a) Adapted with permission [50]. Copyright 2018, Pleiades publishing; (b) Adapted with permission [57].…”

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confidence: 99%

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Application of Molecularly Imprinted Polymers in Plant Natural Products: Current Progress and Future Perspectives

Zuo

et al. 2022

Macro Materials & Eng

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Plants, as a large and complex system, are rich in a variety of natural bioactive constituents. It is crucial to enrich, isolate, purify and detect these natural products. Molecularly imprinted polymers (MIPs) are a class of polymers prepared by molecularly imprinted technology (MIT) that have specific recognition sites and are complementary to templates in shape, size, and binding groups. The synthesis and polymerization mechanism of MIPs are introduced. A variety of preparation methods for MIPs have been developed. MIPs can be classified into three types: non-covalent molecularly imprinted, covalent molecularly imprinted, and semi-covalent molecularly imprinted. MIPs usually consists of five parts: template, functional monomer, cross-linker, initiator, and solvent/reagent. With the advantages of high-specificity binding ability, MIPs have shown excellent efficacy in the separation, enrichment, and purification of plant active products, such as flavonoids, polyphenols, terpenoids, and other components, especially as specific adsorbent materials. Due to the high selectivity to target the analytes, MIPs have also been used as sensors to detect the bioactive constituents in plants. Undeniably, MIPs still face undeniable limitations in the application of plant natural products. The development of MIPs with high selectivity, strong affinity, cost-effectiveness, sensitivity, and environmental friendliness are valuable and promising.

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Optimization of grape juice deacidification using mixture of adsorbents: A case study of Pekmez

Rezaei

Khaledabad

Kia

et al. 2020

Food Science & Nutrition

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Grape syrup (Pekmez or Dooshab) is one of the nutritious products developed through grape processing. One of the main challenges in the industrial manufacture of this product is the utilization of traditional pekmez earth for tartaric acid adsorption. The objectives of this study were to investigate the effect of calcium carbonate, nano‐silica, alumina, and activated carbon as adsorbents and also contact time in grape juice deacidification, and to determine the effects of these adsorbents on the physicochemical properties of grape juice by using the Box–Behnken statistical design. By applying different amounts of these adsorbents in grape juice, the magnitude of acidity decrement and the physicochemical properties such as acidity, pH, transmittance, the amount of reducing sugars, formalin index, and adsorption efficiency were investigated. Data analysis showed that different mixtures of adsorbents at different concentrations had significant effects on acidity and pH of the samples but no effects on the level of reducing sugars and formalin index were observed (p > .05). According to the results, the adsorption capacity with the highest calcium carbonate content (0.7 g/100 ml) was about 88%; the maximum acidity decrements of up to 92% were achieved using the treatments containing calcium carbonate, nano‐silica, and activated carbon, while alumina failed to affect the acidity of the samples. Optimum conditions were obtained in 1.27, 0.21, 0.7, and 0.07 g/100 ml alumina, nano‐silica, calcium carbonate, and activated carbon, respectively, resulting pH 4.3 and acidity 0.37% in grape syrup.

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Molecularly Imprinted Polymer for Selective Extraction of Tartaric Acid

Cited by 4 publications

References 21 publications

Análisis metabolómica del zumo de uva brasileño mediante resonancia magnética nuclear de hidrógeno

Análisis metabolómica del zumo de uva brasileño mediante resonancia magnética nuclear de hidrógeno

Application of Molecularly Imprinted Polymers in Plant Natural Products: Current Progress and Future Perspectives

Optimization of grape juice deacidification using mixture of adsorbents: A case study of Pekmez

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