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Journal articles on the topic 'Fe-Chelating Activity'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Raza, Syed Ali, Ayoub Rashid Chaudhary, Muhammad Waseem Mumtaz, et al. "Fe-Chelating Activity of Conocarpus lancifolius Engl. Leaf Extracts and 1H-NMR Based Metabolite’s classification." Acta Scientifica Naturalis 7, no. 1 (2020): 1–7. http://dx.doi.org/10.2478/asn-2020-0002.

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AbstractThe purpose of the work was to evaluate the Fe-chelating activity of freeze drying assisted ultrasonicated hydroethanolic leaf extracts of Conocarpus lancifolius Engl. along with 1H-NMR based classification of metabolites in most active extract. The finding revealed that 60% ethanolic extract was the most active fraction regarding Fe-chelating activity with value of 75.4 ± 0.6% followed by 80% ethanolic extract having chelating value of 69.24±1.02%. The least Fe-chelating activity was exhibited by aqueous extract. The statistical analysis revealed that the Fe-chelating activity by 60%

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2

Sheikh Hosseini, Mehrnaz, Zahra Moosavi-Nejad, Fatemeh Rezaei Sadrabadi, and Hamid Hosano. "Antioxidant Peptide Production Using Keratin from Feather Waste: Effect of Extraction and Thiol Blocking Method." International Journal of Molecular Sciences 26, no. 9 (2025): 4149. https://doi.org/10.3390/ijms26094149.

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Keratin-made biomaterials, including feathers, are considered a protein-rich bioresource due to their intrinsic properties, including biocompatibility, biodegradability, mechanical resistance, and biological abundance. Beta-keratin exists as an insoluble stringy protein due to the high presence of disulfide cross-links, and as a result, it is mechanically stable and resistant to enzymatic digestion. Because of this, it is not easily decomposed, and this has made the application of feathers difficult. In this study, after dissolving feathers in NaOH, sodium sulfide, and 2-Mercaptoethanol (2-ME)

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3

Wickramasinghe, Hiruni Sashikala, Edirisinghe Dewage Nalaka Sandun Abeyrathne, Ki-Chang Nam, and Dong Uk Ahn. "Antioxidant and Metal-Chelating Activities of Bioactive Peptides from Ovotransferrin Produced by Enzyme Combinations." Poultry 1, no. 4 (2022): 220–28. http://dx.doi.org/10.3390/poultry1040019.

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Peptides produced from food sources possess numerous bioactivities that make them useful in improving human health and preventing diseases. Although many studies related to egg protein hydrolysis are available, little work has been conducted on the production of bioactive peptides from apo-ovotransferrin (OTF) using two-step enzyme hydrolysis. The objectives of this study were to produce bioactive peptides from OTF using two enzymes and to determine their functional properties. Lipolyzed OTF was prepared at a concentration of 20 mg/mL and treated with protease (3 h at 55 °C), papain (3 h at 37

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4

Saundane, Anand R., Vijaykumar Tukaram Katkar, and A. Verma Vaijinath. "Synthesis, Antimicrobial, and Antioxidant Activities of N-[(5′-Substituted-2′-phenyl-1H-indol-3′-yl)methylene]-5H-dibenzo[b,f]azepine-5-carbohydrazide Derivatives." Journal of Chemistry 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/530135.

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The main aim of the present study was to synthesize new leads with potential antimicrobial and antioxidant activities. As a part of systematic investigation of synthesis and biological activity, some new indole compounds3a–cand4a–cwere prepared and screened for their antimicrobial and antioxidant activities. The antimicrobial evaluation of newly synthesized compounds was carried out by cup-plate method. Antimicrobial activity results revealed that compound4ashowed promising activity against bacteriaStaphylococcus aureus,Klebsiella pneumonia, andPseudomonas aeruginosaand exhibited maximum inhib

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5

González, José, Armando Cuéllar, Enmanuel Nossin, and Max Monan. "Iron Chelating Activity of Gossypitrin Isolated from the Petals of Talipariti elatum Sw. (Fryxell) Malvaceae." Journal of Agricultural Studies 5, no. 2 (2017): 1. http://dx.doi.org/10.5296/jas.v5i2.11174.

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A Fe(III)-gossypitrin complex was prepared with a metal to ligand molar ratio of 1:1; 2:1 and 3:2 by mixing stoichiometric amounts of gossypitrin and FeCl3. The isolated complex was characterized by visual observation, UV/Vis, IR and ESI-MS spectroscopy. In this study, we selected the major flavonoid glycoside present in the petals of the flowers of Talipariti elatum Sw. (Fryxell) Malvaceae that grows in Cuba, gossypitrin, to characterize the chelating activity of it chemical compound with FeCl3, to find alternative sources with lower side effects in asthmatic patients. A high chelating activi

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6

Coa, Juan Carlos, Wilson Cardona-Galeano, and Albeiro Restrepo. "Fe3+chelating quinoline–hydrazone hybrids with proven cytotoxicity, leishmanicidal, and trypanocidal activities." Physical Chemistry Chemical Physics 20, no. 31 (2018): 20382–90. http://dx.doi.org/10.1039/c8cp04174a.

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Neglected tropical diseases cause great concern in developing countries where there are millions of reported infected humans. Our calculations support a direct relationship between biological activity and the Fe<sup>3+</sup>chelating ability of the shown set of quinoline–hydrazone hybrids.

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7

Simamora, Adelina, Lusia Paramita, Nur Azreen, Adit Widodo Santoso, and Kris Herawan Timotius. "In Vitro Antidiabetic and Antioxidant Activities of Aqueous Extract from the Leaf and Fruit of Psidium guajava L." Indonesian Biomedical Journal 10, no. 2 (2018): 156–64. http://dx.doi.org/10.18585/inabj.v10i2.402.

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BACKGROUND: The leaf and fruit of Psidium guajava L. are potential for neutraceutical beverage especially for antidiabetic drink. The aims of this study were to determine the antidiabetic activity of aqueous extract of leaf (LE) and fruit (FE) from P. guajava.METHODS: Both extracts were investigated for their inhibitory effect on α-glucosidase activity in vitro. Their antioxidant activities were measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging, ferrous ion chelating, reducing power and phosphomolybdate methods.RESULTS: The IC50 of LE, FEandacarbose as a positive control

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H, Rehana Banu, and Nagarajan N. "EVALUATION OF IN VITRO ANTIOXIDANT ACTIVITY OF A MEDICINAL HERB, WEDELIA CHINENSIS (OSBECK) MERRILL." Asian Journal of Pharmaceutical and Clinical Research 11, no. 10 (2018): 433. http://dx.doi.org/10.22159/ajpcr.2018.v11i10.25008.

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Objective: The objective is to evaluate the antioxidant activity of the methanolic leaf extract of Wedelia chinensis.Methods: In vitro antioxidant activity was evaluated by studying 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, superoxide radical scavenging activity, ferric reducing ability of plasma (FRAP) scavenging activity, hydroxyl radical scavenging activity, metal chelating activity, and total antioxidant activity. Ascorbic acid, BHT, quercetin, and EDTA were used as standards for the experiments.Results: Inhibition concentration50 values observed for DPPH radical sc

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9

Mishchenko, Denis V., Margarita E. Neganova, Elena N. Klimanova, et al. "Chemosensitizing Activity of Histone Deacetylases Inhibitory Cyclic Hydroxamic Acids for Combination Chemotherapy of Lymphatic Leukemia." Current Cancer Drug Targets 18, no. 4 (2018): 365–71. http://dx.doi.org/10.2174/1568009617666170623104030.

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Background: Anti-tumor effect of hydroxamic acid derivatives is largely connected with its properties as efficient inhibitors of histone deacetylases, and other metalloenzymes involved in carcinogenesis. Objective: The work was aimed to (i) determine the anti-tumor and chemosensitizing activity of the novel racemic spirocyclic hydroxamic acids using experimental drug sensitive leukemia P388 of mice, and (ii) determine the structure-activity relationships as metal chelating and HDAC inhibitory agents. Method: Outbreed male rat of 200-220 g weights were used in biochemical experiments. In vivo e

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Eboh, AS, EM Arhoghro, A. Frank-Oputu, E. Wodu, OG Adah, and BA Uwuma. "Phytochemicals and chelating properties in extract of Celosia trigyna inhibits xanthine oxidase in vitro." GSC Biological and Pharmaceutical Sciences 8, no. 2 (2019): 053–58. https://doi.org/10.5281/zenodo.4284604.

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This study is designed to investigate the inhibitory effect of Celosia trigyna against xanthine oxidase. Total flavonoid, phenol, vitamin C were evaluated using standard methods and inhibitory activity of <em>Celosia trigyna</em>  extract on xanthine oxidase (XO) activity <em>in vitro</em> and chelating properties of extract against Iron (II) were also carried out.  The results showed that the extract contained high content of flavonoids, phenolic acid and vitamin C that are beneficial to health. The extract inhibited XO in a dose-dependent manner. The extract als

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11

Selyutina, Olga Yu, Maya A. Ul’yanova, Olga A. Chinak, et al. "Novel Anthraquinone Derivatives and Their Complexes with Metal Ions with Anticancer Activity: Structure/Redox and Chelation Activity Correlations." Pharmaceuticals 17, no. 12 (2024): 1717. https://doi.org/10.3390/ph17121717.

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Background/Objectives: Some specific anthraquinone derivatives (AQs) are known to be used widely as effective chemotherapeutic agents in the treatment of cancer. However, their fundamental shortcoming is the high rate of cardiotoxicity observed in treated patients, which is thought to be caused by the increase in production of reactive oxygen species (ROS) catalyzed by iron and copper. The development of improved AQs and other anticancer drugs with enhanced efficacy but reduced toxicity remains a high priority. The aim of this study was to evaluate the cytotoxic and ROS production effects of c

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12

Altomare, C., W. A. Norvell, T. Björkman, and G. E. Harman. "Solubilization of Phosphates and Micronutrients by the Plant-Growth-Promoting and Biocontrol Fungus Trichoderma harzianum Rifai 1295-22." Applied and Environmental Microbiology 65, no. 7 (1999): 2926–33. http://dx.doi.org/10.1128/aem.65.7.2926-2933.1999.

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ABSTRACT We investigated the capability of the plant-growth-promoting and biocontrol fungus Trichoderma harzianum Rifai 1295-22 (T-22) to solubilize in vitro some insoluble or sparingly soluble minerals via three possible mechanisms: acidification of the medium, production of chelating metabolites, and redox activity. T-22 was able to solubilize MnO2, metallic zinc, and rock phosphate (mostly calcium phosphate) in a liquid sucrose-yeast extract medium, as determined by inductively coupled plasma emission spectroscopy. Acidification was not the major mechanism of solubilization since the pH of

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13

Haydar, Yüksek, Özdemir Gül, and Manap Sevda. "In Vitro Antimicrobial and Antioxidant Properties of Some Novel N,N´-Bis-{3-alkyl-4-[3-(2-methylbenzoxy)-4-methoxybenzylideneamino]-4,5-dihydro-1H-1,2,4-triazol-5-on-1-yl-methyl}-piperazines." Pharmaceutical and Chemical Journal 9, no. 6 (2022): 16–23. https://doi.org/10.5281/zenodo.13980705.

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In this study, 3-alkyl-4-[3-(2-methylbenzoxy)-4-methoxybenzylidenamino]-4,5-dihydro-1<em>H</em>-1,2,4-triazol-5-ones (<strong>3</strong>) were treated with piperazine in the presence of formaldehyde by the Mannich reaction to obtain novel <em>N,N´</em>-bis-{3-alkyl-4-[3-(2-methylbenzoxy)-4-methoxybenzylideneamino]-4,5-dihydro-1<em>H</em>-1,2,4-triazol-5-on-1-yl-methyl}-piperazines<strong> (4)</strong>. The structures of new compounds were characterized from IR, <sup>1</sup>H NMR and <sup>13</sup>C NMR  spectral data. In addition, <em>in vitro</em> antibacterial activities of the new

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14

Tabakaeva, O. V., A. V. Tabakaev, V. E. Silant’ev, and S. V. Kapusta. "Antioxidant properties of supercritical extracts of brown algae." Proceedings of Universities. Applied Chemistry and Biotechnology 14, no. 2 (2024): 253–64. http://dx.doi.org/10.21285/achb.922.

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Macroalgae is a unique feedstock capable of producing significant biomass in a fairly short time and synthesizing various chemical compounds, including specific biologically active substances that exhibit different biological activity. The study of antioxidant, antibacterial, antiviral, anti-inflammatory, and other properties of the biologically active substances of brown algae constitutes a relevant problem. The present study aims to evaluate the antioxidant properties of supercritical extracts of the brown algae Saccharina japonica and Ascophyllum nodosum. The content of carotenoids, phenoli

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15

BM, Brena, Ryden LG, and J. Porath. "Immobilization of beta‐galactosidase on metal‐chelate‐substituted gels." Biotechnology and Applied Biochemistry 19, no. 2 (1994): 217–31. http://dx.doi.org/10.1111/j.1470-8744.1994.tb00295.x.

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The use of copper, zinc, iron, nickel and calcium in three different chelating gels was investigated for preparing immobilized beta‐galactosidase. The chelated ligands [Cu(2+)‐iminodiacetate (IDA), Cu(2+)‐Tris(carboxymethyl)ethylenediamine (TED), Ni(2+)‐IDA and Fe(3+)‐IDA] absorbed the protein so strongly that it can be considered a true immobilization. The obtained enzyme derivatives were investigated with regard to activity and stability. Enzymic activity was highly preserved in general for the TED derivates (90% when compared with that for Cu(2+)‐TED). The immobilized Ni2+ derivatives were

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16

Kumar, A. Ajesh, S.S. Syed Abuthahir, and Hassan Y. Aboul-Enein. "Phytochemical extraction and comparative analysis of antioxidant activities of Areca catechu L. nut extracts." Pharmacia 69, no. (2) (2022): 447–51. https://doi.org/10.3897/pharmacia.69.e77829.

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FRAP assay proved all the extracts of Areca catechu L. nut have antioxidant properties because IC<sub>50</sub> values of all the extracts of the same were less than that of ascorbic acid. Remaining antioxidant assays like DPPH radical scavenging assay, H<sub>2</sub>O<sub>2</sub> scavenging assay, and Fe<sup>2+</sup> chelating assay showed more antioxidant properties in ethyl acetate extract and nonpolar solvent extracts like n- hexane, and chloroform respectively. Antioxidant properties of Areca catechu L. nut varied depending upon the different solvent extract.

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17

Park, Bo Yeon, and Kyung Young Yoon. "Biological activity of enzymatic hydrolysates and the membrane ultrafiltration fractions from perilla seed meal protein." Czech Journal of Food Sciences 37, No. 3 (2019): 180–85. http://dx.doi.org/10.17221/145/2018-cjfs.

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The Perilla seed meal (PSM) protein was hydrolyzed with Flavourzyme; the hydrolysate was fractionated by an ultrafiltration and its physiological activity was measured. Peptides with low molecular weights exhibited higher antioxidant activity, except for the Fe<sup>2+</sup> chelating activity, compared to peptides with a high molecular weight. The IC<sub>50</sub> values of the α-amylase inhibitory activity ranged from 727.89 µg/ml to 757.18 µg/ml, the α-glucosidase inhibitory activity was highest in the &lt; 1 kDa fraction. The &lt; 1 kDa fraction exhibited the

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18

Mravljak, Janez, and Žiga Jakopin. "Iron-Binding and Anti-Fenton Properties of Novel Amino Acid-Derived Cyclic Imide Dioximes." Antioxidants 8, no. 10 (2019): 473. http://dx.doi.org/10.3390/antiox8100473.

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We present a novel route for the preparation of amino acid-derived cyclic imide dioxime derivatives. Readily accessible amino acids were conveniently converted to their corresponding cyclic imide dioximes in simple synthetic steps. The aim of this work was to describe and compare the iron-chelating and antioxidant properties of synthesized compounds in relation to their molecular structure, and in particular, which of those features are essential for iron(II)-chelating ability. The glutarimide dioxime moiety has been established as an iron(II)-binding motif and imparts potent anti-Fenton prope

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19

US, Dilek, Ayşe KARA, Elif ÜNAL, Hülya AKINCIOĞLU, Ali ASLAN, and Mesut TAŞKIN. "Investigation of Antimicrobial and Antioxidant Activities of some Lichens." Cumhuriyet Science Journal 44, no. 3 (2023): 418–29. http://dx.doi.org/10.17776/csj.1317923.

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This study investigated the antimicrobial and antioxidant properties of methanol extracts from five lichen species: Polycauliona candelaria (Syn. Xanthoria candelaria), Nephromopsis chlorophylla (Syn. Cetraria chlorophylla), Circinaria calcarea (Syn. Aspicilia calcarea), Bryoria capillaris (Syn. Alectoria cana), and Peltigera canina (Syn. Dermatodea canina). Antimicrobial activities were determined using the agar disc diffusion method, while minimal inhibitory concentration (MIC) values were determined using the micro-well dilution method. Among the lichen species, methanol extract of Circinar

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20

Haruma, Toshikatsu, Hayato Masuya, Keiko Yamaji, et al. "Abies sachalinensis naturally growing at a sedimentary site acquires iron tolerance via detoxicants production, elemental transfer adjustment, and root endophytic Phialocephala bamuru producing siderophores." PLOS One 20, no. 6 (2025): e0325294. https://doi.org/10.1371/journal.pone.0325294.

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Abies sachalinensis naturally growing in heavy metal-rich sedimentary sites exhibits heavy metal tolerance. Although root endophytes increase heavy metal tolerance in various plants, their effects on the tolerance in conifers are not focused on. The objective of our study was to clarify the heavy metal tolerance, considering root endophytes. We measured the heavy metal concentrations in root-zone soil, leaves, stems, fine roots along with heavy metal detoxicants. We also isolated root endophytes and identified the endophyte with the highest siderophore production activity for chelating heavy m

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21

Pant, G., Om Prakash, Mahesh Chandra, et al. "Biochemical analysis, pharmacological activity, antifungal activity and mineral analysis in methanolic extracts of Myrica esculenta and Syzygium cumini: the Indian traditional fruits growing in Uttarakhand Himalaya." Indian Journal of Pharmaceutical and Biological Research 2, no. 01 (2014): 26–34. http://dx.doi.org/10.30750/ijpbr.2.1.4.

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Myrica esculenta (Myricaceae) and Syzygium cumini(Myrtaceae), the Indian traditional fruits were studied for their biochemical assay, antifungal activity and mineral analysis. The biochemical assay in terms of total phenols, flavonols, ortho dihydroxy phenolic, ascorbic acid and phytic acid content and antioxidant activity revealed different quantitative make up in all the different samples. The in vitro antioxidant activity determined by reducing power assay, chelating power on Fe2+ ions and 2, 2-diphenylpicrylhydrazil (DPPH) radical scavenging activity were found to be good to moderate in a

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22

Lane, Sarah, Farzam Viand, Kayla Bolduc, Juergen Ehlting, and Patrick B. Walter. "The Potential of Plant-Based Compounds As Iron Chelators." Blood 132, Supplement 1 (2018): 3631. http://dx.doi.org/10.1182/blood-2018-99-117528.

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Abstract Introduction: The use of iron-chelators is an important clinical treatment for iron overload diseases such as β-Thalassemia (Thal) and neurodegeneration with brain iron accumulation. Iron overload can impair immune cell, cardiac and neurological function. Iron chelation can alleviate some of this morbidity, but at increasing doses certain chelating agents can have serious side effects. Plant-based treatments may offer an alternative. In plants, Fe is required for photosynthesis and enzyme production but is often limited for uptake from the soil. When Fe is limited, plant roots may pro

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23

Kęska, Paulina, Sascha Rohn, Michał Halagarda, and Karolina M. Wójciak. "Peptides from Different Carcass Elements of Organic and Conventional Pork—Potential Source of Antioxidant Activity." Antioxidants 9, no. 9 (2020): 835. http://dx.doi.org/10.3390/antiox9090835.

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The growing consumer interest in organic foods, as well as, in many cases, the inconclusiveness of the research comparing organic and conventional foods, indicates a need to study this issue further. The aim of the study was to compare the effects of meat origin (conventional vs. organic) and selected elements of the pork carcass (ham, loin, and shoulder) on the meat proteome and the antioxidant potential of its peptides. The peptidomic approach was used, while the ability of antioxidants to scavenge 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulfonic acid (ABTS), to chelate Fe(II) ions, and to re

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24

Kumar, Deepak, Arun Kumar Singh, Ajay Kumar, Dayanand Prasad, Vijay Kumar, and Shivadhar Sharma. "Synthesis, Spectral Characterization and Biological Activity of Metal(II) Complexes of 2,4,5-Trimethoxybenzaldehyde-S-Benzyldithiocarbazone." Asian Journal of Chemistry 32, no. 1 (2019): 209–14. http://dx.doi.org/10.14233/ajchem.2020.22476.

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2,4,5-Trimethoxybenzaldehyde was condensed with S-benzyldithiocarbazate to give Schiff base 2,4,5-trimethoxy benzaldehyde-S-benzyldithiocarbazone (BBTC), which was used for complexation with Mn(II), Fe(II) and Co(II) metal ions. The complexes were formulated as M(BBTC)2X2 where X is Cl−, NO3− and CH3COO−. The FTIR spectra of the metal complexes in comparison to that of free ligand suggested the coordination through azomethine nitrogen and thion sulphur forming six membered chelating with metal ion. The magnetic susceptibility and electronic spectral bands revealed octahedral symmetry (Oh) arou

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Liu, Tao, Shanshan Wang, Huifen Ma, et al. "Microwave-Assisted Extraction Combined with In-Capillary [Fe(ferrozine)3]2+-CE-DAD to Screen Active Components with the Ability to Chelate Ferrous Ions from Flos Sophorae Immaturus (Flos Sophorae)." Molecules 24, no. 17 (2019): 3052. http://dx.doi.org/10.3390/molecules24173052.

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An efficient microwave-assisted extraction (MAE) combined with in-capillary [Fe(ferrozine)3]2+-capillary electrophoresis-Diode Array Detector (in-capillary [Fe(ferrozine)3]2+-CE-DAD) was developed to screen active components with the ability to chelate ferrous ions and determine the total antioxidant activity. The MAE conditions, including methanol concentration, extraction power, extraction time, and the ratio of material to liquid, were optimized by an L9(34) orthogonal experiment. Background buffer, voltage, and cartridge temperature that affect the separation of six compounds were optimize

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Szymanowska, Urszula, and Barbara Baraniak. "Antioxidant and Potentially Anti-Inflammatory Activity of Anthocyanin Fractions from Pomace Obtained from Enzymatically Treated Raspberries." Antioxidants 8, no. 8 (2019): 299. http://dx.doi.org/10.3390/antiox8080299.

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Raspberry pomace was obtained from raspberries subjected to enzymatic maceration using three commercial pectinolytic preparations (Pectinex Ultra SP-L, Pectinex Yield Mash, and Ultrazym AFP-L). Phenolic compounds were extracted and anthocyanin fractions were isolated using the SPE solid phase extraction technique. In the separated anthocyanin fractions, the content of individual compounds was determined by the HPLC technique and the antioxidant activity was assessed with four complementary methods (DPPH and ABTS radical scavenging activity, chelating Fe(II) power, and ferric reducing power). P

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Ebrahimzadeh, Mohammad, Seyed Nabavi, Seyed Nabavi, and Bahman Eslami. "Antihemolytic and antioxidant activities of Allium paradoxum." Open Life Sciences 5, no. 3 (2010): 338–45. http://dx.doi.org/10.2478/s11535-010-0013-5.

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AbstractAntioxidant activity of the aerial part and bulbs of Allium paradoxum was investigated by eight in vitro assay systems. Extracts showed good antioxidant activity. IC50 for 1,1-diphenyl-2-picryl hydrazyl radical-scavenging activity was 890.9±43.2 and 984.9±33.5 µg/ml for the aerial part and bulbs, respectively. The aerial parts have better reducing power than bulb extracts but not comparable with Vitamin C (P>0.001). Extracts showed weak Fe2+ chelating ability, the IC50 being 959±47 and 530±24 µg/ml for bulbs and aerial parts, respectively. Both tested extracts exhibited good hydroge

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Shaik, Haq Abdul, David Siaussat, and Archana Mishra. "Interactions among Zinc, Iron, and Paraquat in the Physiological and Toxicological Responses of the Egyptian Cotton Leafworm Spodoptera littoralis." Toxics 13, no. 1 (2025): 38. https://doi.org/10.3390/toxics13010038.

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Agricultural pollutants co-interact and affect the vital functions, stress tolerance, resistance, immunity, and survival of insect pests. These metal–herbicide interactions have inevitable but remarkable effects on insects, which remain poorly understood. Here, we examined the effects of the interactions among zinc (Zn), iron (Fe), and paraquat (PQ) at a sublethal dose on the physiological response of the Egyptian cotton leafworm Spodoptera littoralis. Co-exposure to Zn and Fe improved leafworm survival (100% at 10–20 mg, 85% at 40 mg) compared to separate exposures. Low Zn/Fe/PQ toxicity like

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Grimek, Tracey L., and Jorge C. Escalante-Semerena. "The acnD Genes of Shewenella oneidensis and Vibrio cholerae Encode a New Fe/S-Dependent 2-Methylcitrate Dehydratase Enzyme That Requires prpF Function In Vivo." Journal of Bacteriology 186, no. 2 (2004): 454–62. http://dx.doi.org/10.1128/jb.186.2.454-462.2004.

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ABSTRACT The propionate utilization operons of several bacteria differ from each other in the occurrence of two genes, acnD and prpF, in place of or in addition to the prpD gene encoding an Fe/S-independent 2-methylcitrate dehydratase enzyme. We cloned the acnD and prpF genes from two organisms, Shewanella oneidensis and Vibrio cholerae, and found that, together, the AcnD and PrpF proteins restored the ability of a prpD mutant strain of Salmonella enterica to grow on propionate as a source of carbon and energy. However, neither acnD nor prpF alone was able to substitute for prpD. The AcnD and

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Murata, Yoshiko, Emiko Harada, Kenji Sugase, et al. "Specific transporter for iron(III): Phytosiderophore complex involved in iron uptake by barley roots." Pure and Applied Chemistry 80, no. 12 (2008): 2689–97. http://dx.doi.org/10.1351/pac200880122689.

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Iron (Fe) is an essential element for plant growth. Gramineous plants have generally developed a distinct strategy to efficiently acquire insoluble Fe, which is characterized by the synthesis and secretion of an Fe-chelating substance, phytosiderophore (PS) such as mugineic acid (MA), and by a specific uptake system for Fe(III)-PS complexes. In a previous study, we identified a gene specifically encoding an Fe(III)-PS transporter (HvYS1) in barley. This gene as well as the encoded protein is specifically expressed in the epidermal cells of the roots, and gene expression is greatly enhanced und

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Kiriyachan Kurian, Noble, and Sarita Ganapathy Bhat. "Protoprotection and Anti-inflammatory Properties of Non–cytotoxic Melanin from Marine Isolate Providencia rettgeri strain BTKKS1." Biosciences, Biotechnology Research Asia 14, no. 4 (2017): 1475–84. http://dx.doi.org/10.13005/bbra/2594.

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ABSTRACT: Photoprotection and Anti-inflammatory properties of characterized melanin produced by marine proteobacterium Providencia rettgeri strain BTKKS1 was explored in the study. Characterization of melanin was carried out by chemical, FTIR, proton NMR and EPR analysis. The radical scavenging property was estimated using DPPH assay and Fe 2+ chelating potential was also evaluated. Effect of melanin on the activities of Cyclooxygenase, Lipoxygenase, Myeloperoxidase and Cellular Nitrite is used to evaluate anti-inflammatory potential. Enhancement of Sun Protection Factor (SPF) is evaluated to

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Mykhailovych, Vasyl, Andrii Kanak, Ştefana Cojocaru, et al. "Structural, Optical, and Catalytic Properties of MgCr2O4 Spinel-Type Nanostructures Synthesized by Sol–Gel Auto-Combustion Method." Catalysts 11, no. 12 (2021): 1476. http://dx.doi.org/10.3390/catal11121476.

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Spinel chromite nanoparticles are prospective candidates for a variety of applications from catalysis to depollution. In this work, we used a sol–gel auto-combustion method to synthesize spinel-type MgCr2O4 nanoparticles by using fructose (FS), tartaric acid (TA), and hexamethylenetetramine (HMTA) as chelating/fuel agents. The optimal temperature treatment for the formation of impurity-free MgCr2O4 nanostructures was found to range from 500 to 750 °C. Fourier transform infrared (FTIR) spectroscopy was used to determine the lattice vibrations of the corresponding chemical bonds from octahedral

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TAVMAN, Aydin, Demet GÜRBÜZ, Ayça AKTAŞ KARAÇELİK, Bengü ERTAN, and Adem ÇINARLI. "Synthesis, characterization, antibacterial and antioxidant activity of 1,5-bis(6-chloro-1H-benzimidazol-2-yl)pentan-3-one and its Fe(III), Co(II), Cu(II), Zn(II) and Ru(II) complexes." Revue Roumaine de Chimie 68, no. 10-12 (2024): 547–57. http://dx.doi.org/10.33224/rrch.2023.68.10-12.07.

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A new bis-benzimidazole ligand, 1,5-bis(6-chloro-1H-benzimidazol-2-yl)pentan-3-one (L, C19H16Cl2N4O), and its complexes with Fe(III), Co(II), Cu(II), Zn(II) and Ru(II) chlorides are synthesized and characterized by elemental analysis, molar conductivity, magnetic moment, TGA, FT-IR, 1H-NMR, fluorescence and UV-visible spectroscopy. The spectral data suggest that the chelating ligand acted as tridentate towards to Cu(II) ion however bidentate in the other complexes. According to the molar conductance data, [Fe(L)2Cl2]Cl•2H2O and [Cu(L)Cl]Cl•2H2O complexes are 1:1 electrolytes whereas [Co(L)Cl2]

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Abeydeera, Nalin, Bogdan M. Benin, Khalil Mudarmah, et al. "Harnessing the Dual Antimicrobial Mechanism of Action with Fe(8-Hydroxyquinoline)3 to Develop a Topical Ointment for Mupirocin-Resistant MRSA Infections." Antibiotics 12, no. 5 (2023): 886. http://dx.doi.org/10.3390/antibiotics12050886.

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8-Hydroxyquinoline (8-hq) exhibits potent antimicrobial activity against Staphylococcus aureus (SA) bacteria with MIC = 16.0–32.0 µM owing to its ability to chelate metal ions such as Mn2+, Zn2+, and Cu2+ to disrupt metal homeostasis in bacterial cells. We demonstrate that Fe(8-hq)3, the 1:3 complex formed between Fe(III) and 8-hq, can readily transport Fe(III) across the bacterial cell membrane and deliver iron into the bacterial cell, thus, harnessing a dual antimicrobial mechanism of action that combines the bactericidal activity of iron with the metal chelating effect of 8-hq to kill bacte

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Strakh, Yana Leonidovna, and Ol'ga Stepanovna Ignatovets. "ANTIOXIDANT AND ANTIRADICAL ACTIVITY IN VITRO OF EXTRACTS FROM THE LEAVES OF RUBUS CHAMAEMORUS L. (ROSACEAE)." chemistry of plant raw material, no. 4 (December 14, 2021): 319–25. http://dx.doi.org/10.14258/jcprm.2021049305.

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Cloudberry (Rubus chamaemorus L.) is the leader among northern berries in the content of phenolic compounds, which can cause a wide range of biological activity. Currently, there is an increased interest in the study of the antioxidant activity of plant extracts in order to search for promising sources of raw materials for the pharmaceutical and food industries. The article presents the results of a comparative analysis of interpopulation and gender differences in antioxidant and antiradical activities in vitro of cloudberry leaf extracts growing on the territory of the Republic of Belarus. Cl

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Tamafo Fouegue, Aymard Didier, Julius Numbonui Ghogomu, Désiré Bikélé Mama, Nyiang Kennet Nkungli, and Elie Younang. "Structural and Antioxidant Properties of Compounds Obtained from Fe2+Chelation by Juglone and Two of Its Derivatives: DFT, QTAIM, and NBO Studies." Bioinorganic Chemistry and Applications 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/8636409.

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The chelating ability of juglone and two of its derivatives towards Fe2+ion and the antioxidant activity (AOA) of the resulting chelates and complexes (in the presence of H2O and CH3OH as ligands) in gas phase is reported via bond dissociation enthalpy, ionization potential, proton dissociation enthalpy, proton affinity, and electron transfer enthalpy. The DFT/B3LYP level of theory associated with the 6-31+G(d,p) and 6-31G(d) Pople-style basis sets on the atoms of the ligands and the central Fe(II), respectively, was used. Negative chelation free energies obtained revealed that juglone derivat

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Wang, Sheng-Chieh, Ruei-Nian Li, Li-Ching Lin, et al. "Comparison of Antioxidant and Anticancer Properties of Soft Coral-Derived Sinularin and Dihydrosinularin." Molecules 26, no. 13 (2021): 3853. http://dx.doi.org/10.3390/molecules26133853.

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Marine natural products are abundant resources for antioxidants, but the antioxidant property of the soft corals-derived sinularin and dihydrosinularin were unknown. This study aimed to assess antioxidant potential and antiproliferation effects of above compounds on cancer cells, and to investigate the possible relationships between them. Results show that sinularin and dihydrosinularin promptly reacted with 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2-azinobis (3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS), and hydroxyl (•OH), demonstrating a general radical scavenger activity. Sinularin and d

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Neganova, M. E., Yu R. Aleksandrova, S. A. Pukhov, S. G. Klochkov, and V. N. Osipov. "Mechanisms of cytotoxic action of a series of directionally synthesized heterocyclic hydroxamic acids." Biomeditsinskaya Khimiya 66, no. 4 (2020): 332–38. http://dx.doi.org/10.18097/pbmc20206604332.

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Cyclic hydroxamic acids based on quinazoline-4(3H)-one and dihydroquinazoline-4(1H)-one have been synthesized. The antioxidant and iron-chelating properties of these compounds, their effect on the activity of the histone deacetylase enzyme, and their cytotoxic effect on cells of various tumor lines have been investigated. We have identified two compounds-hits, which exhibit the multipharmacological type of the antineoplastic activity. Their cytotoxic effect on cells of human lung carcinoma A549 and breast adenocarcinoma MCF-7 is obviously associated with their ability to modulate the level of

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Tundis, Rosa, Khaled Rashed, Ataa Said, Francesco Menichini, and Monica R. Loizzo. "In vitro Cancer Cell Growth Inhibition and Antioxidant Activity of Bombax ceiba (Bombacaceae) Flower Extracts." Natural Product Communications 9, no. 5 (2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900527.

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The flowers of Bombax ceiba were investigated for their chemical composition, antioxidant effects and antiproliferative activity against seven human cancer cell lines. The antiproliferative responses of diethyl ether (DE) and light petroleum (PE) extracts were evaluated by sulforhodamine B (SRB) assay against MCF-7, HeLa, COR-L23, C32, A375, ACHN, and LNCaP cells in comparison with a human normal cell line, 142BR. Moreover, extracts were characterized by GC-MS analysis and tested for their antioxidant properties by different in vitro systems, namely DPPH, Fe-chelating activity and β-carotene b

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Melo, Bárbara Fernandes, José Weverton Almeida-Bezerra, Severino Denicio Gonçalves de Sousa, et al. "Chemical Composition and Evaluation of Antioxidant, Antibacterial, and Synergistic Activities of the Fixed Oil of Persea americana Miller (LAURACEAE)." Revista de Gestão Social e Ambiental 19, no. 3 (2025): e011372. https://doi.org/10.24857/rgsa.v19n3-024.

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Objective: This study aimed to characterize the chemical constituents of the fixed oil from the fruit and evaluate its antioxidant, antibacterial, and bacterial resistance-modulating potential. Method: The methodology adopted for this research included the collection of fruits obtained from CEASA do Cariri, Juazeiro do Norte – CE. The oil was extracted using Soxhlet (OAPS) and cold pressing (OAPF), and its fatty acids were analyzed by gas chromatography-mass spectrometry (GC-MS). Physicochemical indices were determined according to official methodologies. Antioxidant activity was assessed usin

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Lima, Elvis Estilak, Adrielle Rodrigues Costa, José Weverton Almeida-Bezerra, et al. "Phytochemistry, chelating and reducing potential of Mesosphaerum suaveolens (L.) Kuntze (Lamiaceae) essential oil." Research, Society and Development 9, no. 11 (2020): e1099119333. http://dx.doi.org/10.33448/rsd-v9i11.9333.

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Products of natural origin with potential chelating or reducing Fe+ free become promising in antioxidant research, because they have the ability to soften transition metals that can cause cellular damage by oxidative stress. Thus, the aim of this study is to promote the evaluation of the antioxidant potential of essential oil by the orthophenanthroline method, in addition to promoting phytochemical analysis of the essential oil of M. suaveolens. This vegetable, by other antioxidant methods, has promising properties in inhibiting free radicals. To achieve these objectives, a chromatographic ana

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Kırboğa, Kevser Kübra, Ecir Uğur Küçüksille, and Utku Köse. "Ignition of Small Molecule Inhibitors in Friedreich's Ataxia with Explainable Artificial Intelligence." BRAIN. Broad Research in Artificial Intelligence and Neuroscience 14, no. 3 (2023): 287–313. http://dx.doi.org/10.18662/brain/14.3/475.

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Iron (Fe) chelating medicines and Histone deacetylase (HDAC) inhibitors are two therapy options for hereditary Friedreich's Ataxia that have been shown to improve clinical results (FA). Fe chelation molecules can minimize the quantity of stored Fe, and HDAC inhibitors can boost the expression of the Frataxin (FXN) gene in enhancing FA. A complete quantitative structure-activity relationship (QSAR) search of inhibitors from the ChEMBL database is reported in this paper, which includes 437 compounds for Fe chelation and 1,354 compounds for HDAC inhibitors. For further investigation, the IC50 was

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Mandal, Kalpa, May Abdullah Abomuti, Sami A. Al-Harbi, et al. "Sequestration of Toxic Metal Ions from Industrial Effluent Using the Novel Chelating Resin Tamarind Triazine Amino Propanoic Acid (TTAPA)." Water 15, no. 16 (2023): 2924. http://dx.doi.org/10.3390/w15162924.

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Due to higher levels of industrial activity, the concentrations of toxic substances in natural water bodies are increasing. One of the most dangerous groups of toxic compounds is heavy metals, with even trace amounts of most heavy metals being harmful to aquatic life. This is why purifying water has become an urgent priority. In this context, ion-exchange resins have become more widely used in water treatment processes. However, to reduce the costs and improve the sustainability of this strategy, natural resins are favored over synthetic versions. Therefore, in the present study, a natural tam

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Christianah Olusola Ayodele, Jacob Olalekan Arawande, Abraham Olasupo Oladebeye Babawale Peter Olatunji, and Ayodeji Temitope Adesuyi Olajubu Ayotunde Karimu. "Comparative Studies on Chemical Profile of Red Soko (Celosia Trigyna) and Green Soko (Celosia Argentea)." Sumerianz Journal of Medical and Healthcare, no. 62 (June 10, 2023): 13–19. http://dx.doi.org/10.47752/sjmh.62.13.19.

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Chemical profile of leafy vegetables enable researchers to affirm the constituents present in them as well as knowing their possible usefulness for consumption and medicinal applications. Red and green soko were obtained, rinsed in water and cut into smaller pieces, air dried, grounded and sieved to give 40mm mesh size powder. The powdered samples were analyzed for proximate composition and mineral contents using standard methods. The antioxidant properties such as reducing power, ferrous ion chelating activity 2,2- diphenyl-1picrylhydrazyl (DPPH) radical scavenging activity and 2,2-azinobis (

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Attar, Usmangani A., and Savaliram G. Ghane. "PHYTOCHEMICALS, ANTIOXIDANT ACTIVITY AND PHENOLIC PROFILING OF DIPLOCYCLOS PALMATUS (L.) C. JEFFERY." International Journal of Pharmacy and Pharmaceutical Sciences 9, no. 4 (2017): 101. http://dx.doi.org/10.22159/ijpps.2017v9i4.16891.

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Objective: The aim of this study was to analyze phytochemicals, antioxidant potential and phenolic profiling of leaf and fruit extracts of Diplocyclos palmatus.Methods: The leaves and fruits were subjected for sequential extraction with hexane, chloroform, methanol and water. All extracts were subjected to biochemical studies such as phenols, tannins, flavonoids, terpenoids and antioxidant assays such as 1,1-diphenyl-1-picryl hydrazyl (DPPH), 2,2’ Azinobis (3-ethyl-benzothiozoline-6-sulfonic acid (ABTS), ferric reducing antioxidant property (FRAP), metal chelating and phospho- molybdenum reduc

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García-Díez, Guillermo, Roger Monreal-Corona, and Nelaine Mora-Diez. "Complexes of Copper and Iron with Pyridoxamine, Ascorbic Acid, and a Model Amadori Compound: Exploring Pyridoxamine’s Secondary Antioxidant Activity." Antioxidants 10, no. 2 (2021): 208. http://dx.doi.org/10.3390/antiox10020208.

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The thermodynamic stability of 11 complexes of Cu(II) and 26 complexes of Fe(III) is studied, comprising the ligands pyridoxamine (PM), ascorbic acid (ASC), and a model Amadori compound (AMD). In addition, the secondary antioxidant activity of PM is analyzed when chelating both Cu(II) and Fe(III), relative to the rate constant of the first step of the Haber-Weiss cycle, in the presence of the superoxide radical anion (O2•−) or ascorbate (ASC−). Calculations are performed at the M05(SMD)/6-311+G(d,p) level of theory. The aqueous environment is modeled by making use of the SMD solvation method i

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Shyamala, B. S., P. V. A. Lakshmi, and V. J. T. Raju. "Synthesis, Characterization, Antifeeding and Insect Growth-Regulating Activities of Cr(III), Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) Complexes with N-Acetylacetonyl-3-Aminocoumarin." Journal of Scientific Research 2, no. 3 (2010): 525. http://dx.doi.org/10.3329/jsr.v2i3.4673.

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Metal complexes of Cr(III), Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) have been synthesized using N-acetylacetonyl-3-aminocoumarin as chelating agent. The ligand behaves as a monobasic tridentate ONO donor towards Ni(II) and as monobasic bidentate ON donor towards other cations. All the complexes have been proposed to have octahedral geometry on the basis of analytical, thermal conductivity, spectral and magnetic data. The complexes have been screened against Spodoptera litura; F (Lepidoptera: noctuiidae) for antifeeding and insect growth-regulating activities The results show appreciable ant

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Fook Yee Chye, Jin Yi Wong, and Jau-Shya Lee. "Nutritional Quality and Antioxidant Activity of Selected Edible Wild Mushrooms." Food Science and Technology International 14, no. 4 (2008): 375–84. http://dx.doi.org/10.1177/1082013208097445.

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Five species of edible wild mushrooms were selected to determine the proximate composition, vitamins (retinol, α-tocopherol, γ-tocopherol, thiamin, riboflavin, and ascorbic acid) and mineral contents (Fe, Zn, Co, Ca, Mg, K, and Na), antioxidant activity, and total phenolics. Hygrophorus sp. showed significant higher ( p<0.05) fat content as compared to other wild mushrooms with the mean value of 6.57%. However, Polyporus tenuiculus was found to be a good source of fiber while Hygrocybe sp. was good in α-tocopherol among the mushrooms tested. The iron and calcium contents were the highest in

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Caxito, Marina L. C., Rachell R. Correia, Anne Caroline C. Gomes, et al. "In VitroAntileukemic Activity ofXanthosoma sagittifolium(Taioba) Leaf Extract." Evidence-Based Complementary and Alternative Medicine 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/384267.

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Xanthosoma sagittifoliumSchott is a herb of the Araceae family, popularly known as taioba, which is consumed as food in some regions of Brazil, Africa, and Asia. This species has already been evaluated for the antifungal activities. However, based on its potential antitumor activity, the present study further aimed to examine the antitumor, as well as chelation, activity ofX. sagittifoliumleaf extract. Results showed that hydroethanolic extract ofX. sagittifoliumleaves (HEXs-L) exhibits cytotoxic effects against the immortalized line of human T-lymphocytic (Jurkat) and myelogenous (K562) leuke

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Rangel, Maria, Tânia Moniz, André Silva, and Andreia Leite. "Tuning the Anti(myco)bacterial Activity of 3-Hydroxy-4-pyridinone Chelators through Fluorophores." Pharmaceuticals 11, no. 4 (2018): 110. http://dx.doi.org/10.3390/ph11040110.

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Controlling the sources of Fe available to pathogens is one of the possible strategies that can be successfully used by novel antibacterial drugs. We focused our interest on the design of chelators to address Mycobacterium avium infections. Taking into account the molecular structure of mycobacterial siderophores and considering that new chelators must be able to compete for Fe(III), we selected ligands of the 3-hydroxy-4-pyridinone class to achieve our purpose. After choosing the type of chelating unit it was also our objective to design chelators that could be monitored inside the cell and f

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