Determination of antioxidant capacity of medicinal tinctures using cuprac method involving Cu(II) neocuproine immobilized into polymethacrylate matrix

Saranchina, N. V.; Damzina, Anna A.; Ermolaev, Yaroslav E.; Urazov, E.V.; Гавриленко, Н. А.; Гавриленко, М. А.

doi:10.1016/j.saa.2020.118581

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…A polymethacrylate matrix was taken to tightly immobilize BCP and allow easy permeation of the analyte. There are good examples of applying PMM for the solid-phase quantification of various species [21][22][23][24][25]. The initial 6.5 pH value of spoiled milk [26] coincides with BCP's pK a value 6.5 ± 0.3 in the PMM.…”

Section: Introductionmentioning

confidence: 89%

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

2021

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Optical chemical sensors can yield distinctively different responses that are dependent on the method applied for readout and evaluation. We therefore present a comprehensive study on the pH determined non-continuously with optical sensors in real milk samples by either photometry or colorimetry (via the RGB-readout of digital images) compared to the pH values obtained electrochemically by potentiometry. Additionally, the photometric determination of pH was conducted with single-wavelength and a dual wavelength ratiometric evaluation of the absorbance. It was found that both the precision and accuracy of the pH determined by photometry benefit from lower concentrations of bromocresol purple, which served as the pH indicator inside the sensor membrane. A further improvement is obtained by the ratiometric evaluation of the photometric sensor response. The pH values obtained from the colorimetric evaluation, however, gain in precision and accuracy if a higher concentration of the indicator is immobilized inside the sensor membrane. This has a major impact on the future fabrication of optical pH sensor membranes because they can be better tuned to match to the most precise and accurate range of the planned detection method.

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Section: Introductionmentioning

confidence: 89%

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

2021

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Natural Antioxidants of the Underutilized and Neglected Plant Species of Asia and South America

Shahrajabian

Marmitt

Cheng

et al. 2023

LDDD

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Background: Plants have played an essential role in the search for new compounds for the most diverse therapeutic purposes. Recently, more attention is paid to natural antioxidants because of the possible insecurity of synthetic antioxidants Objective: The review is aimed at summarizing the most important and common natural antioxidants and their resources from medicinal plants. Method: The research was performed using data bases of PubMed, Google Scholar, Science Direct, Taylor and Francis, etc. to search for all collected scientific publications. Results: The most important medicinal plants with antioxidant activities in Iran are Artemisia, berberry fruit, borage, calendula, coriander, cumin, green tea, hawthorn, jujube, pomegranate, rose, rosemary, black zira, tea, and thyme. Important traditional medicinal plants with antioxidant activities in China are Asparagus, bindii, blueberries, camellia, Chinese bayberry, Chinese bitter melon, Chinese cabbage, Chinese cherry, Chinese jujube, Chinese olive, pomegranate, Chinese rose tea, Chinese toon, Chinese watermelon, black tea, knotweed, Chinese quince, Chinese rhubarb, sumac, wolfberry, dendrobium, drumstick tree, Fiscus species, ginger, ginkgo, goji berry, grape, Jerusalem thorn, kiwifruit seed oil, and liquorice root. Anacardium occidentale L., Ananas comosus (L.) Merril, Baccharis trimera (Less) DC., Carapa guianensis Aubl., Casearia sylvestris Sw., Cordia verbenacea DC., Croton lechleri Müll. Arg., and Eugenia uniflora L., are the main medicinal plants with antioxidant activities in Brazil. Conclusion: Antioxidants are those molecules which are involved in the scavenging of these reactive species causing oxidative stress, and defined as those substances which could prevent the oxidation of the substrate at low concentrations. The main derived exogenous natural antioxidants are derived from medicinal plants, fruits, foods, flowers, and traditional herbal medicines in different parts of the world.

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Survey on Medicinal Plants and Herbs in Traditional Iranian Medicine with Anti-oxidant, Anti-viral, Anti-microbial, and Anti-inflammation Properties

Shahrajabian

Sun

2023

LDDD

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The review aims to summarize the major and dominant natural antioxidants and their resources from medicinal and herbal plants with antiviral, anti-inflammation and antimicrobial activities. For this review manuscript, online databases, including Web of Science, Scopus, PubMed, and Science Direct, were searched for papers published from 1960 to November, 2021. Search terms consisted of “medicinal plants”, “traditional Iranian medicine”, “traditional Persian medicine”, “pharmaceutical properties”, “antioxidant activity”, “antiviral activity”, “anti-inflammation”, “antimicrobial” and “antibacterial activities”. (-)-Epicatechin, Caffeic acid, Gallic acid, Hydroxytyrosol, Kaempferol, and Resveratrol are some of the most important chemical compounds with antioxidant properties. Rosmarinic acid, Caffeic acid, Carnosol, P-Coumaric acid, Carnosic acid, Luteolin, Apigenin, and Kaempferol are the major chemical compounds with antiviral properties. Curcumin, Colchicine, Resveratrol, Capsaicin, (-)-Epigallocatechin, Quercetin, Myristicin, and Elmicin are the principal chemical compounds with anti-inflammatory properties. Isoeugenol, Coumarin, Piperonal, Scoparone, Spathulenol, D-Limonene, and Myrcene are the principal chemical compounds with antibacterial properties in traditional Iranian medicine. Persian traditional medicine, or Iranian traditional medicine, is one of the main ancient forms of traditional medicine, which has influenced knowledge regarding other medicinal plants in various countries. It has also been considered one of the most well-known traditional and holistic systems of medicine.

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Determination of antioxidant capacity of medicinal tinctures using cuprac method involving Cu(II) neocuproine immobilized into polymethacrylate matrix

Cited by 4 publications

References 26 publications

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

Natural Antioxidants of the Underutilized and Neglected Plant Species of Asia and South America

Survey on Medicinal Plants and Herbs in Traditional Iranian Medicine with Anti-oxidant, Anti-viral, Anti-microbial, and Anti-inflammation Properties

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