Results 41 to 50 of about 3,038 (194)
CyTA - Journal of Food, 2020 Replacing traditional extraction technology with ultrasonic or microwave-assisted extraction has attracted considerable attention. In order to maximize the yield of extracted polyphenolic compounds and antioxidants from Sakiz artichoke by-products, a ...
Seda Kayahan, Didem Saloglu
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Novel Colorimetric Sensor for Cupric Reducing Antioxidant Capacity (CUPRAC) Measurement
Procedia Engineering, 2016 Abstract A novel optic sensor was developed for screening the total antioxidant capacity based on the use of cupric – neocuproine (Cu(II)−Nc) immobilized into a polymethacrylate matrix (PMM) with spectrophotometric measurement. The absorption change associated with the formation of the colored Cu(I)−Nc chelate in the PMM as a result of reaction with ...
Krylova, E. +3 more
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Hydroxyl radical detection with a salicylate probe using modified CUPRAC spectrophotometry and HPLC
Talanta, 2008 Reactive oxygen species (ROS) may attack biological macromolecules giving rise to oxidative stress-originated diseases, so it is important to establish efficient methods to screen hydroxyl radical scavengers for antioxidant therapy. Since *OH is very short-lived, secondary products resulting from *OH attack to various probes are measured. As a low-cost
Bektasoglu, Burcu +3 more
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Hittite Journal of Science and Engineering, 2019 Algae contain a large amount of biological active compounds functioning as antioxidant, antimicrobial and anti-tumour. In the present research, antioxidant activity of freshwater alga Microspora sp.
Zeynep Akar, Bulent Akar, Bulent Sahin
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Indonesian Journal of Pharmaceutical EducationLibo fruit (Ficus septica Burm. F.) is traditionally used for its medicinal properties, including antioxidant activity. This study assessed the antioxidant potential of methanol (EM) and purified (EP) extracts of Libo fruit collected from four regions in
Nurull Hikmah +6 more
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The Scientific World Journal, 2020 Free radicals can cause many diseases, such as cancer. Antioxidant is a compound that could scavenge free radicals. One of the natural antioxidants is guava.
Rika Hartati +2 more
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Procedia Chemistry, 2014 AbstractCUPRAC is a method used to determine antioxidants quantifying the chromophore [Cu(Nc)2]+, generated upon increases of added antioxidants to a Cu(II) containing solution. In this work, an electrochemical alternative to quantify this complex is presented using cyclic voltammetry and chronoamperometry, compared with the classical spectroscopic ...
Cárdenas, Arely +2 more
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Pharmaceutical Biology, 2017 Context: Stachys guyoniana Noë ex. Batt. and Mentha aquatica L. are two Algerian Lamiaceae used in folk medicine. Objective: To investigate their antioxidant, anticholinesterase and antibacterial activities.
Maria Ferhat +7 more
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Annals of Agricultural Sciences, 2021 Fruits of cardamom (Amomum compactum Sol. Ex Maton), Zingiberaceae family, has long been used as herbs and spices. The aim of the research was to evaluate the total flavonoid content and antioxidant activity in ethanol and ethyl acetate of fruit extract ...
Waras Nurcholis +4 more
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Hematology, 2014 The CUPRAC-BCS and antioxidant activity (AOA) assays have been developed as indirect methods to determine the total antioxidant capacity (TAC). We examined these assays as markers, in erythrocytes, under oxidative stress (induced by storage) and with antioxidants--vitamin C, L-carnitine, and curcumin.Antioxidants were added to blood samples, stored and
Ravikumar, Soumya, Rajashekharaiah, Vani
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