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Journal articles on the topic 'Hydrogen Peroxide Scavenging'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

M, Yadav, Kumari S, Nagraj N, et al. "Hydrogen Peroxide Scavenging by Methanolic Extracts of Coriander: An In Vitro Antioxidant Study." Pharmaceutical Drug Regulatory Affairs Journal 8, no. 1 (2025): 1. https://doi.org/10.23880/pdraj-16000162.

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Most of the nutraceutical plants, plants associated products and foods are known for their promising antioxidant properties due to the presence of several metabolites like polyphenolic compounds, flavonoids, terpenoids, vitamin C and many other. These molecules have strong tendency to scavenge the free radicals (reactive oxygen species) generated inside our body system due to the various reasons. Out of several methods for the antioxidant activity determination; hydrogen peroxide scavenging activity is an important method. This method has been used to determine the percentage scavenging activi

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2

Asada, Kozi. "Ascorbate peroxidase - a hydrogen peroxide-scavenging enzyme in plants." Physiologia Plantarum 85, no. 2 (1992): 235–41. http://dx.doi.org/10.1111/j.1399-3054.1992.tb04728.x.

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Asada, Kozi. "Ascorbate peroxidase - a hydrogen peroxide-scavenging enzyme in plants." Physiologia Plantarum 85, no. 2 (1992): 235–41. http://dx.doi.org/10.1034/j.1399-3054.1992.850216.x.

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K.Ramanji, Reddy* Dr.Chandaka Madhu Dr.J.Balaji Chandra Mouli Dr.B.Jagan Mohan Reddy Penumala Joshi Ballavarapu Sharanya. "COMPARATIVE STUDY ON PHYTOCHEMICAL SCREENING AND ANTIOXIDANT ACTIVITY ON ETHANOLIC EXTRACT OF MUSA ACUMINATE AND MANGIFERA INDICA." Indo American Journal of Pharmaceutical Sciences 04, no. 09 (2017): 2817–29. https://doi.org/10.5281/zenodo.888116.

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The present study was undertaken to investigate in vitro antioxidant activity of alcoholic extract of musa acuminata and mangifera indica . Method and methodlogy: The total Phenolic content was determined using folinciocalteau method while the total flavanoid content was determined using aluminum chloride method. In vitro antioxidant activity was evaluated using the Reducing power assay , Hydrogen peroxide scavenging assay, nitric oxide scavenging activity, and DPPH scavenging activity. Result: In the present study we have conclude that Mangifera Indica has a significant activity than Musa Acu

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Dr.ChandakaMadhu, Gunugurthi Ramya Sai Shreeja Alikette Deeti Prasanna Adiraju Usha Lalitha Gollapalli Shivapoojitha Meher Fathima. "COMPARATIVE STUDY ON PHYTOCHEMICAL SCREENING AND ANTIOXIDANT ACTIVITY ON ETHANOLIC EXTRACT OF ACTINIDIA DELICIOSA AND VITIS VINFERA." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 01 (2018): 735–44. https://doi.org/10.5281/zenodo.1174193.

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The present study was undertaken to investigate in vitro antioxidant activity of alcoholic extract of Actinidia Deliciosa And Vitis Vinfera. Method and methodlogy: The total Phenolic content was determined using folinciocalteau method while the total flavanoid content was determined using aluminum chloride method. In vitro antioxidant activity was evaluated using the Reducing power assay , Hydrogen peroxide scavenging assay, nitric oxide scavenging activity, and DPPH scavenging activity. Result: In the present study we have conclude that Vitis Vinfera, has a significant activity than Actinidia

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Enechi, Osmund Chukwuma Okeke Emmanuel Sunday* Abonyi Uchenna Collins Nwankwo Nicodemus Emeka Ndimele Ugochi Joy Benneth Moses Ebere. "EVALUATION OF IN VITRO ANTI-INFLAMMATORY AND ANTIOXIDANT POTENTIALS OF METHANOL LEAF EXTRACT OF FAGARA ZANTHOXYLOIDES." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES o6, no. 08 (2019): 14365–71. https://doi.org/10.5281/zenodo.3360753.

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<strong><em>Background:</em></strong><em> Fagara zanthoxyloides is a medicinal plant used in traditional medicine for the treatment of elephantiasis, toothache, sexual impotence, malaria, dysmenorrheal and abdominal pain among rural dwellers.</em> <strong><em>Objective:</em></strong><em> To study the In vitro anti-inflammatory and antioxidant activities of methanol extract of Fagara zanthoxyloides leaves.</em> <strong><em>Materials and Methods:</em></strong><em> Methanol extract of Fagara zanthoxyloides leaves were used for this study. In vitro anti-inflammatory studies were performed for the

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7

Callahan, H. L., R. K. Chouch, and E. R. James. "Hydrogen peroxide is the most toxic oxygen species for Onchocerca cervicalis microfilariae." Parasitology 100, no. 3 (1990): 407–15. http://dx.doi.org/10.1017/s0031182000078690.

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SUMMARYThe toxicity of the active oxygen species hydrogen peroxide, superoxide radical, hydroxyl radical and singlet oxygen to microfilariae (mf) has been studied in vitro, using active oxygen-generating systems and scavengers/inhibitors. Mf viability was monitored by uptake of the radiolabel, [3H]2-deoxy-D-glouse. Hydrogen peroxide and singlet oxygen, but not superoxide radical or hydroxyl radical, are toxic for mf. Hydrogen peroxide was toxic for mf within 2 h at concentrations as low as 5 ¼, an amount eosinophils have been shown to release in vitro (Weiss et al. 1986). Catalase and thiourea

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8

Kharat, Amol R., Farooqui Zakerab, and Kiran Ramesh Kharat. "Free Radical Scavenging Potential of Mentha arvensis of South Gujarat: Evidence from In-vitro Assay." Journal of Drug Delivery and Therapeutics 9, no. 3 (2019): 263–68. http://dx.doi.org/10.22270/jddt.v9i3.2866.

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Present work was undertaken to evaluate efficacy of aqueous and methanol extracts Mentha arvensis leaves as free radical scavenger. The free radical scavenging activity was evaluated by nitric oxide scavenging method, hydrogen peroxide scavenging method and ferric thiocyanate method. The result of the studies was compared with the standard solution of Ascorbic Acid (Vitamin C) treated with same reagent. The results of all the studies showed significant free radical scavenging activity in both aqueous and methanolic extracts of Mentha arvensis and methanolic extract showed the highest free radi

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Paździoch-Czochra, Marzanna, and Anna Wideńska. "Spectrofluorimetric determination of hydrogen peroxide scavenging activity." Analytica Chimica Acta 452, no. 2 (2002): 177–84. http://dx.doi.org/10.1016/s0003-2670(01)01455-6.

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10

Gillham, D. J., and A. D. Dodge. "Hydrogen-peroxide-scavenging systems within pea chloroplasts." Planta 167, no. 2 (1986): 246–51. http://dx.doi.org/10.1007/bf00391422.

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11

Mohammedi, Zohra. "Extraction, Phenolic Content and Hydrogen Peroxide Scavenging Capacity of Extracts from Some Honey Samples, Propolis and Bee Pollen." Biology, Medicine, & Natural Product Chemistry 10, no. 1 (2021): 27–32. http://dx.doi.org/10.14421/biomedich.2021.101.27-32.

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Honey and propolis is natural food, produced by honey bees (Apis mellifera) and largely used by the local population for its medicinal properties. Our work aims to extract and evaluate the hydrogen peroxide scavenging capacity of different phenolic extracts from some bee products. Phenolic compounds from honey samples, propolis, and bee pollen were extracted by methanol and subjected to radical scavenging activity towards hydrogen peroxide. The results showed the highest values for the total phenolic and total flavonoïd contents in propolis and bee pollen, and a great hydrogen peroxide (H2O2)

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12

Zhang, Ning, Zhen Yu Wang, Hua Zhang, Jian Ren, and Xiu Mei Hao. "In Vitro Antioxidant Activities of Polysaccharides from Auricularia auriada." Advanced Materials Research 183-185 (January 2011): 104–9. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.104.

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This study aims to evaluate the antioxidative activities of water and alkaline solution pH=8, 50% ethanolic (APP1 or SAPP1), 75% ethanolic (APP2 or SAPP2) and 100% ethanolic (APP3 or SAPP3) extracts of A. auricular. The antioxidant activities, including the ABTS, superoxide anion radical-scavenging effect, hydrogen peroxide radical-scavenging effect and chelating ability on ferrous ions were studied in vitro. A comparison of the 50% effective concentration (EC50) values of different antioxidative reactions revealed that SAPP3 was more effective in scavenging ABTS, hydrogen peroxide and chelati

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13

Rayadurgam, Sireesha, and Manikandan Krishnan. "Polyherbal Formulation for Atherosclerosis: GC-MS Fingerprinting, In-vivo Antioxidant and Antibacterial Activities." INTERNATIONAL JOURNAL OF PHARMACEUTICAL QUALITY ASSURANCE 15, no. 01 (2024): 88–93. http://dx.doi.org/10.25258/ijpqa.15.1.13.

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Atherosclerosis is a prolonged inflammatory disease affecting large and medium-sized arteries, requiring a phytotherapeutic approach that incorporates multiple bioactive elements and a multi-target strategy. A novel polyherbal formulation has been formulated to treat atherosclerosis. The methanolic extract of the formulation has been characterized using gas chromatography–mass spectrometry (GC-MS) fingerprinting analysis. The extract was further screened for antioxidant activity like DPPH radical scavenging assay, hydrogen peroxide scavenging activity, intracellular reactive oxygen species (RO

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Siriwardhana, Nalin, K. W. Lee, Y. J. Jeon, S. H. Kim, and J. W. Haw. "Antioxidant Activity of Hizikia fusiformis on Reactive Oxygen Species Scavenging and Lipid Peroxidation Inhibition." Food Science and Technology International 9, no. 5 (2003): 339–46. http://dx.doi.org/10.1177/1082013203039014.

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Water and organic extracts (diethyl ether, chloroform, ethyl acetate, acetone, ethanol and methanol) obtained from Hizikia fusiformis were screened on reactive oxygen species (ROS) scavenging assays (1,1-diphenyl-2-picrylhydrazyl (DPPH), superoxide anion, hydrogen peroxide and hydroxyl radical) and lipid peroxidation (inhibition of linoleic acid oxidation) inhibitory assays. Water, methanol and ethanol extracts showed significant ROS radical scavenging activities. Water extracts showed high scavenging activities on hydrogen peroxide (around 76%) and DPPH radicals (around 75%) while it presente

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Li, Qiong Jie, and Chun Ling Xiao. "Study on Antioxidant Activity of Pigment in Black Soybean Peel." Advanced Materials Research 881-883 (January 2014): 378–83. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.378.

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With black soybean as raw materials, 50% ethanol as the extractant, at 70°C, pH1.0, solid-liquid ratio of 1:100(g:mL), at 90min were used to extract the pigment of black soybean Through the establishment of DPPH•,•OH, superoxide anion free radicals, reducing power and hydrogen peroxide. The results show: its ability of scavenging DPPH•, •OH, hydrogen peroxide is far better than ascorbic acid. The pigment at concentration of 0.6mg/mL shows a scavenging rate for DPPH• up to 88.29%,and for •OH 89.36%,for hydrogen peroxide89.75%.In addition，the general reducing power and scavenging rate for supero

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Ambe, D. A., C. E. Odiete, J. D. Buba, and E. E. Odion. "Antioxidant Effects of Cocos nucifera L. (Asteraceae) Stem Bark Extracts using Diphenyl-I-picrylhydrazyl; Hydrogen Peroxide and Nitric Oxide Scavenging Assay." Journal of Applied Sciences and Environmental Management 27, no. 10 (2023): 2291–95. http://dx.doi.org/10.4314/jasem.v27i10.21.

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Coconut (Cocos nucifera L. (Arecaceae)) supplies nearly all of the basics of life, including food, oil and phyto-medicines. However, reports on the antioxidant effects of the stem bark of C. nucifera are scanty. Therefore, the objective of this study is to evaluate the antioxidant effects of coconut stem bark extracts using diphenyl-i-picrylhydrazyl (DPPH); hydrogen peroxide (H2O2) and nitric oxide (NO) scavenging assay using standard techniques The stem bark of the plant was pulverized and macerated with 70% ethanol. Antioxidant analysis was evaluated on the extract using diphenyl-I-picrylhyd

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Olaitan, Michael O., Cosmas O. Ujowundu, Chiamaka P. Nzebude, et al. "Organic wastes of Citrus sinensis Peels- a source of eco-friendly and sustainable bioactive compounds for promoting health." Asian Journal of Biochemistry, Genetics and Molecular Biology 16, no. 2 (2024): 21–31. http://dx.doi.org/10.9734/ajbgmb/2024/v16i2358.

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To determine the phytochemicals, radical scavenging and antioxidant potential of orange peel extract. Citrus sinensis were subjected to extraction with ethanol. Gas chromatography (GC) was utilized to determine the phytochemical composition of orange peel extract. Hydrogen peroxide, superoxide, nitric oxide, and hydroxyl radical scavenging assays were conducted to assess radical scavenging potential of the extract. Antioxidant activities of the peel extracts were determined via the 2,2-diphenylpicrylhydrazyl (DPPH) free radical scavenging activity, ferric reducing antioxidant power (FRAP) assa

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Nagaretnam, Prahadeesh, and Arulmoly Kiruthika. "Structure activity Relationship Study of Simple Hydroxyl Coumarins as Antioxidant to Scavenge Hydrogen peroxide." RESEARCH REVIEW International Journal of Multidisciplinary 4, no. 6 (2019): 675–82. https://doi.org/10.5281/zenodo.3275482.

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Coumarins are heterocyclic compounds; structurally constructed by α-pyrone ring, fused with benzene ring. Coumarins are very interested because of their abundance in nature and their tremendous pharmacological properties such as anticoagulant, anticancer, antibacterial, anti-inflammatory, anti-tuberculosis, antioxidant, etc.The need for the antioxidant is very important because of the role reactive oxygen species and its contribution to many deleterious effects in human body. Hydrogen peroxide is such a reactive oxygen species. This study focused on synthesizing the parent compound,Couma

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Sharma, Rajesh Kumar, Rajni Singh, K. K. Jha, and Abhishek B. "Antibacterial and Antioxidant activity of Benincasa hispida using Hydrogen peroxide scavenging model." Indian Journal of Pharmaceutical and Biological Research 2, no. 01 (2014): 86–94. http://dx.doi.org/10.30750/ijpbr.2.1.14.

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The seeds of Benincasa hispida commonly known as ash gourd belonging to Cucurbitaceae family is employed as a main ingredient in kusmanda lehyam in Ayurvedic system of medicine. The seeds of Benincasa hispida mashed with milk or the various preparations from the pulp of fruit in the form of sweetmeats, like Kusmanda paka and petha are commonly used as a general tonic, aphrodisiac, rejuvenative and also a brain tonic. The plant of Benincasa hispida was collected from (Central Council for Research in Ayurveda and Siddha, Dept. of ayush, Ministry of Health and F.W, Govt. of India New Delhi) Govt.

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Chika C Abba, Chineze B Nsofor, Chioma C Udeozor, et al. "In-vitro comparative study of solvent effect on antioxidant properties of leaf extracts of Anthocleista djalonensis." Magna Scientia Advanced Biology and Pharmacy 11, no. 2 (2024): 072–79. http://dx.doi.org/10.30574/msabp.2024.11.2.0020.

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This study demonstrated that the extraction solvents play an important role in the extraction of important bioactive compounds with antioxidant properties from the leaves of Anthocleista djalonensis. Anthocleista djalonensis, a plant native to tropical Africa, is believed to have antioxidant properties due to its bioactive composition. The powdered leaves were macerated using local gin, hot distilled water, and analytical ethanol to extract bioactive compounds. The in vitro antioxidant activity of these extracts was assessed using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assays, nitric

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Nam, Sook-Hyun, Ju-Won Lee, Eun-Ju Kim, Jae-Wuk Koo, and Tae-Mun Hwang. "Evaluation of Portable Rhodamine B Analyzer for Monitoring OH Radical Scavenging Demand in Ultraviolet Advanced Oxidation Processes." Sustainability 13, no. 23 (2021): 13279. http://dx.doi.org/10.3390/su132313279.

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A portable OH radical scavenging demand analyzer that can be installed and operated on site was developed to measure water quality indicators that influence the generation of OH radicals from UV/hydrogen peroxide reactions to determine the UV dose and the hydrogen peroxide injection concentration. Rhodamine B (RhB) was used as an indicator for the continuous measurement of the OH radical scavenging demand of four samples with different water quality parameters using the rapid, easy, and real-time UV-Vis spectrophotometer method. The results demonstrated that the estimated rate constant for the

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Salathe, M., P. Guldimann, G. E. Conner, and A. Wanner. "Hydrogen peroxide-scavenging properties of sheep airway mucus." American Journal of Respiratory and Critical Care Medicine 151, no. 5 (1995): 1543–50. http://dx.doi.org/10.1164/ajrccm.151.5.7735613.

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Macáková, Kateřina, Lubomir Opletal, Miroslav Polášek, Věra Samková, and Luděk Jahodář. "Free-radical Scavenging Activity of Some European Boletales." Natural Product Communications 4, no. 2 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400219.

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The ethanol extracts of 47 mushroom species from the order Boletales were tested for their free radical scavenging activities by means of the DPPH free-radical scavenging and hydrogen peroxide-induced luminol chemiluminescence assays. In the DPPH radical scavenging test, 26 species gave EC50 values of less than 1 mg/mL. The highest activity was exhibited by Gyrodon lividus (0.05 mg/mL). However, in the hydrogen peroxide-induced luminol chemiluminescence assay, only 4 species had EC50 values of less than 1 mg/mL, with the highest activity being exhibited by Strobilomyces floccopus (0.26 mg/mL).

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Macáková, Kateřina, Lubomír Opletal, Miroslav Polášek, and Věra Samková. "Free-radical Scavenging Activity of some European Polyporales." Natural Product Communications 5, no. 6 (2010): 1934578X1000500. http://dx.doi.org/10.1177/1934578x1000500623.

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The ethanol extracts of 30 mushroom species from the order Polyporales were tested for their free radical scavenging activities by means of the DPPH free-radical scavenging and hydrogen peroxide-induced luminol chemiluminescence assays. In the DPPH radical scavenging test, 7 species gave EC50 values of less than 1 mg/mL. The highest activity was exhibited by Fomitopsis pinicola (0.09 mg/mL). However, in the hydrogen peroxide-induced luminol chemiluminescence assay, only 4 species had EC50 values of less than 1 mg/mL, with the highest activity being exhibited also by F. pinicola (0.26 mg/mL). W

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Charoenlap, Nisanart, Phornphan Sornchuer, Anong Piwkam, Kriangsuk Srijaruskul, Skorn Mongkolsuk, and Paiboon Vattanaviboon. "The roles of peroxide protective regulons in protecting Xanthomonas campestris pv. campestris from sodium hypochlorite stress." Canadian Journal of Microbiology 61, no. 5 (2015): 343–50. http://dx.doi.org/10.1139/cjm-2014-0792.

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The exposure of Xanthomonas campestris pv. campestris to sublethal concentrations of a sodium hypochlorite (NaOCl) solution induced the expression of genes that encode peroxide scavenging enzymes within the OxyR and OhrR regulons. Sensitivity testing in various X. campestris mutants indicated that oxyR, katA, katG, ahpC, and ohr contributed to protection against NaOCl killing. The pretreatment of X. campestris cultures with oxidants, such as hydrogen peroxide (H2O2), t-butyl hydroperoxide, and the superoxide generator menadione, protected the bacteria from lethal concentrations of NaOCl in an

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Cox, Andrew G., Christine C. Winterbourn, and Mark B. Hampton. "Mitochondrial peroxiredoxin involvement in antioxidant defence and redox signalling." Biochemical Journal 425, no. 2 (2009): 313–25. http://dx.doi.org/10.1042/bj20091541.

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Prxs (peroxiredoxins) are a family of proteins that are extremely effective at scavenging peroxides. The Prxs exhibit a number of intriguing properties that distinguish them from conventional antioxidants, including a susceptibility to inactivation by hyperoxidation in the presence of excess peroxide and the ability to form complex oligomeric structures. These properties, combined with a high cellular abundance and reactivity with hydrogen peroxide, have led to speculation that the Prxs function as redox sensors that transmit signals as part of the cellular response to oxidative stress. Multic

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Hamryszczak, Zaneta T., Andrea Pozzer, Florian Obersteiner, et al. "Distribution of hydrogen peroxide over Europe during the BLUESKY aircraft campaign." Atmospheric Chemistry and Physics 22, no. 14 (2022): 9483–97. http://dx.doi.org/10.5194/acp-22-9483-2022.

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Abstract. In this work we present airborne in situ trace gas observations of hydrogen peroxide (H2O2) and the sum of organic hydroperoxides over Europe during the Chemistry of the Atmosphere – Field Experiments in Europe (CAFE-EU, also known as BLUESKY) aircraft campaign using a wet chemical monitoring system, the HYdrogen Peroxide and Higher Organic Peroxide (HYPHOP) monitor. The campaign took place in May–June 2020 over central and southern Europe with two additional flights dedicated to the North Atlantic flight corridor. Airborne measurements were performed on the High Altitude and LOng-ra

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Aitken, Robert J., Alexandra Wilkins, Natasha Harrison, et al. "A Comparative Analysis of the Antioxidant Profiles Generated by the RoXstaTM System for Diverse Biological Fluids Highlights the Powerful Protective Role of Human Seminal Plasma." Antioxidants 14, no. 1 (2025): 90. https://doi.org/10.3390/antiox14010090.

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(1) Background: The RoXstaTM system has been developed as a rapid, effective means of profiling different types of antioxidant activity. The purpose of this study was to examine its performance utilizing a diverse array of biological fluids including semen, blood plasma, serum, urine, saliva, follicular fluid and plant extracts. (2) Methods: The RoXstaTM system was used to assess the ability of different fluids to suppress free radical formation as well as scavenge a variety of toxic oxygen metabolites including free radicals and both hydrogen and organic peroxides. (3) Results: Human semen wa

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Dahiru, Naziru, Ritu Paliwal, Muhammad Abubakar Madungurum, Abdurrahman Siraj Abubakar, and Bilkisu Abdullahi. "Study on Antioxidant Property of Syzygium aromaticum (Clove)." Journal of Biochemistry, Microbiology and Biotechnology 10, no. 1 (2022): 13–16. http://dx.doi.org/10.54987/jobimb.v10i1.657.

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This paper is aimed at evaluating the antioxidant properties of Eugenia Caryophyllata (Syzygium aromaticum), 100% aqueous and 20:80% (water and alcohol) for hydroethanolic and hydromethanolic extracts were prepared as working solutions for the studies. About 5 different antioxidant examinations of Syzygium aromaticum (Clove) extracts were carried out which include total phenolic content, antioxidant assay, free radical’s DPPH scavenging activity, scavenging hydrogen peroxide and reducing power assay, which was estimated spectrophotometrically by the use of butylated hydroxyanisole (BHA) as sta

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Anandakumar, Arunkumar, Ananthan Gnanakkan, and Murugan Rajaram. "Antioxidant Activity of astaxanthin isolated from Charybdis Edwardsii Leene and Buitendijk ,1949 from Pazhayar, Southeast Coast of India." International Journal of Trend in Scientific Research and Development 2, no. 5 (2018): 25–29. https://doi.org/10.31142/ijtsrd15762.

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Astaxanthin extracted from Red Crab Charybdis edwardsii was assayed for antioxidant activity viz., total antioxidant, reducing power, hydrogen peroxide radical scavenging assay, and DPPH free radicals scavenging activity. Final concentration of astaxanthin was quantified to be 49.05 µg g using the standard astaxanthin. The antioxidant activity was found to be 60 , hydrogen peroxide scavenging activity showed 89 inhibition, whereas 1,1 diphenyl 2 picrylhydrazl DPPH activity showed 86 of scavenging activity. Present investigation proves that the astaxanthin from C. edwardsii acts as a prom

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Omar, Naaman M., Katherine Fleury, Brian Beardsall, Ondřej Prášil, and Douglas A. Campbell. "Genomic capacities for Reactive Oxygen Species metabolism across marine phytoplankton." PLOS ONE 18, no. 4 (2023): e0284580. http://dx.doi.org/10.1371/journal.pone.0284580.

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Marine phytoplankton produce and scavenge Reactive Oxygen Species, to support cellular processes, while limiting damaging reactions. Some prokaryotic picophytoplankton have, however, lost all genes encoding scavenging of hydrogen peroxide. Such losses of metabolic function can only apply to Reactive Oxygen Species which potentially traverse the cell membrane outwards, before provoking damaging intracellular reactions. We hypothesized that cell radius influences which elements of Reactive Oxygen Species metabolism are partially or fully dispensable from a cell. We therefore investigated genomes

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Attama, Chika, Lawrence Luka, and Chidama, Bulama Ndakudu. "Chemical characterization and antioxidant activities of essential oil of Ficus elastica Roxb. ex Hornem. leaves." International Journal of Secondary Metabolite 11, no. 3 (2024): 562–73. http://dx.doi.org/10.21448/ijsm.1377543.

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The present study investigates the chemical constituents and antioxidant potential of essential oils extracted from Ficus elastica. The essential oils were obtained through steam distillation and were subjected to gas chromatography-mass spectrometry (GC-MS) analysis to determine their constituents representing 100% of the total peak areas. The analysis revealed the presence of 34 compounds. Among these compounds, Caryophyllene was found to be the major constituent, accounting for 50.57% of the total percentage area. Among other identified major compounds include γ-Muurolene (8.19%), camphene

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Yi, Kaige, Yun Ren, Hui Zhang, Baogang Lin, Pengfei Hao, and Shuijin Hua. "Can Rice Growth Substrate Substitute Rapeseed Growth Substrate in Rapeseed Blanket Seedling Technology? Lesson from Reactive Oxygen Species Production and Scavenging Analysis." Antioxidants 13, no. 8 (2024): 1022. http://dx.doi.org/10.3390/antiox13081022.

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Rapeseed (Brassica napus L.) seedlings suffering from inappropriate growth substrate stress will present poor seedling quality. However, the regulatory mechanism for the production and scavenging of reactive oxygen species (ROS) caused by this type of stress remains unclear. In the current study, a split plot experiment design was implemented with two crop growth substrates—a rice growth substrate (RIS) and rapeseed growth substrate (RAS)—as the main plot and two genotypes—a hybrid and an open-pollinated variety (Zheyouza 1510 and Zheyou 51, respectively)—as the sub-plot. The seedling quality

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Madueke, Augustine, Valentine Nwanelo, Emmanuel Tabansi, et al. "Evaluation of Antioxidant Properties of Choloroform Extract of Chasmanthera dependens Roots." Medical Sciences Forum 2, no. 1 (2020): 21. http://dx.doi.org/10.3390/cahd2020-08606.

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Chasmanthera dependens is a medicinal plant with wide application in African traditional medicine for the management of several pathologies. We report the antioxidant properties of the chloroform extract of C. Dependens root (CECDR) as to auspiciously provide scientific information that could explain some of the reported roles of the plant in human diseases. In vitro studies assayed for 1,1-diphenyl2-picrylhydrazyl (DPPH) scavenging, hydrogen peroxide scavenging, ferric reducing antioxidant power (FRAP), and total antioxidant capacity (TAC). DPPH radical scavenging activity was concentration d

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Ilechukwu, C. C., C. O. Ezenwelu, J. C. Ifemeje, C. Okechukwu, J. N. Ilechukwu, and I. H. Iheukwumere. "In Vitro Antioxidant and Phytochemical Analysis of Solanum aethiopicum (Garden Egg Leaf) and Telfairia occidentalis (Fluted Pumpkin Leaf)." IPS Interdisciplinary Journal of Biological Sciences 4, no. 1 (2025): 107–11. https://doi.org/10.54117/iijbs.v4i3.56.

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This study evaluated and compared the in vitro antioxidant activity and phytochemical constituents of methanol leaf extracts of Solanum aethiopicum and Telfairia occidentalis. The phytochemical analysis of both Solanum aethiopicum and Telfairia occidentalis revealed the presence of alkaloids, saponins, flavonoids, terpenoids, glycosides, and steroids in both plant extracts, whereas tannins were absent in Solanum aethiopicum but present in Telfairia occidentalis. The results showed that the methanol leaf extracts of T. occidentalis and S. aethiopicum were able to scavenge nitric oxide in a dose

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Ganie, Showkat Ahmad, Ehtishamul Haq, Akbar Masood, Abid Hamid, and Mohmmad Afzal Zargar. "Antioxidant and Protective Effect of Ethyl Acetate Extract ofPodophyllum hexandrumRhizome on Carbon Tetrachloride Induced Rat Liver Injury." Evidence-Based Complementary and Alternative Medicine 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/238020.

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The antioxidant and hepatoprotective activities of ethyl acetate extract was carefully investigated by the methods of DPPH radical scavenging activity, Hydroxyl radical scavenging activity, superoxide radical scavenging activity, hydrogen peroxide radical scavenging activity, and its reducing power ability. All thesein vitroantioxidant activities were concentration dependent, which were compared with standard antioxidants such as BHT, α-tocopherol. The hepatoprotective potential ofPodophyllum hexandrumextract was also evaluated in male Wistar rats against carbon tetrachloride- (CCl4-) induced

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Dong, Yuanyang, Qihang Hou, Meng Sun, Jingjing Sun, and Bingkun Zhang. "Targeted Isolation of Antioxidant Constituents from Plantago asiatica L. and In Vitro Activity Assay." Molecules 25, no. 8 (2020): 1825. http://dx.doi.org/10.3390/molecules25081825.

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Plantago asiatica L. is widely distributed in Eastern Asia and a commonly used drug in China, Korea, and Japan for diuretic and antiphlogistic purposes. In this experiment, the present study was performed to isolate antioxidant molecules based on the DPPH scavenging activity assay and discover the bioactive compounds which contributed to performing the function of Plantago asiatica L. Each faction was chosen for further isolation guided by DPPH scavenging activity assay. Afterwards, two potential bioactive molecules, aesculetin and apigenin, were isolated for in vitro antioxidant activity in c

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Uvarajan, Deenathayalan, and Brindha Durairaj. "Antimicrobial Potential of Zinc Oxide Nanoparticles from Marine Macroalgae." International Journal for Research in Applied Science and Engineering Technology 10, no. 3 (2022): 676–79. http://dx.doi.org/10.22214/ijraset.2022.40608.

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Abstract: The current study evaluates the free antimicrobial and radical scavenging properties of zinc oxide nanoparticles(ZnONP’s) synthesized from an aqueous extract of Sargassum polycystum brown algae. The free radical scavenging potential of ZnO nanoparticles was evaluated through DPPH, Nitric oxide, Hydroxyl radical and Hydrogen peroxide scavenging assays. In addition to that, the antibacterial and antifungal activity of synthesized ZnO nanoparticles was examined against different species. The free radical scavenging and antimicrobial potential of these Sargassum polycystum ZnO nanopartic

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Barnard, Michele L., and Sadis Matalon. "Scavenging of hydrogen peroxide by isolated perfused rabbit lungs." Free Radical Biology and Medicine 9 (January 1990): 129. http://dx.doi.org/10.1016/0891-5849(90)90634-u.

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El-Chemaly, Souheil, Matthias Salathe, Sylvia Baier, Gregory E. Conner, and Rosanna Forteza. "Hydrogen Peroxide–Scavenging Properties of Normal Human Airway Secretions." American Journal of Respiratory and Critical Care Medicine 167, no. 3 (2003): 425–30. http://dx.doi.org/10.1164/rccm.200206-531oc.

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Gulcin, İlhami, Mehmet Emin Buyukokuroglu, and O. Irfan Kufrevioglu. "Metal chelating and hydrogen peroxide scavenging effects of melatonin." Journal of Pineal Research 34, no. 4 (2003): 278–81. http://dx.doi.org/10.1034/j.1600-079x.2003.00042.x.

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Seaver, Lauren Costa, and James A. Imlay. "Hydrogen Peroxide Fluxes and Compartmentalization inside Growing Escherichia coli." Journal of Bacteriology 183, no. 24 (2001): 7182–89. http://dx.doi.org/10.1128/jb.183.24.7182-7189.2001.

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ABSTRACT Escherichia coli generates about 14 μM hydrogen peroxide (H2O2) per s when it grows exponentially in glucose medium. The steady-state intracellular concentration of H2O2 depends on the rates at which this H2O2 is dissipated by scavenging enzymes and by efflux from the cell. The rates of H2O2 degradation by the two major scavenging enzymes, alkyl hydroperoxide reductase and catalase, were quantified. In order to estimate the rate of efflux, the permeability coefficient of membranes for H2O2 was determined. The coefficient is 1.6 × 10−3 cm/s, indicating that permeability is substantial

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Huang, Liang, Chunxia Li, Ning Sun, et al. "Optimization of Liquid Culture Condition of a Novel Fungus Hygrophoropsis sp. and Antioxidant Activity of Extracts." Biochemistry Research International 2020 (August 1, 2020): 1–11. http://dx.doi.org/10.1155/2020/7403257.

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To evaluate pharmacological activities of a novel fungus Hygrophoropsis sp., the influence of aeration rate on the production of mycelial biomass, exopolysaccharides (EPS), and intrapolysaccharides (IPS) in the fungus Hygrophoropsis sp. was investigated. And the water extracts of cultured Hygrophoropsis sp. mycelia and the fermentation broth were analyzed for their antioxidation activity by using four different assay methods such as hydroxyl radical scavenging, superoxide radical scavenging, hydrogen peroxide scavenging, and reducing power. The Hygrophoropsis sp. was cultivated under various a

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Ekanayake, P., Y. D. Lee, and J. Lee. "Antioxidant Activity of Flesh and Skin of Eptatretus Burgeri (Hag Fish) and Enedrias Nebulosus (White Spotted Eel)." Food Science and Technology International 10, no. 3 (2004): 171–77. http://dx.doi.org/10.1177/1082013204044822.

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Ethyl acetate and diethyl ether extracts, previously extracted with methanol, were obtained from flesh and skin of Eptatretus burgeri (hag fish) and Enedrias nebulosus (white spotted eel). Eight different extracts (4 mg/mL) were tested for DPPH free radical scavenging activity and the values were compared with commercial antioxidants (α-tocopherol and BHT). All extracts of E. burgeri exhibited significantly positive results (> 65%) in scavenging DPPH radicals compared to E. nebulosus. Thus, only E. burgeri extracts were tested for dose effect, hydrogen peroxide, hydroxyl radical, superoxide

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Rouamba, Ablassé, Moussa Compaoré, Maurice Ouédraogo, and Martin Kiendrebeogo. "Human Lymphocyte-Protective Effects of an Ethanol Extract from Detarium microcarpum Guill. and Perr. (Caesalpiniaceae) Fruit Pulp." Antioxidants 7, no. 8 (2018): 104. http://dx.doi.org/10.3390/antiox7080104.

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The current study aimed to evaluate, in vitro, the antioxidant capacity and the human lymphocyte-protective effect of the ethanolic extract from Detarium microcarpum fruit pulp against oxidative stress damage. Human lymphocytes were incubated with different concentrations of extract, followed by the addition of hydrogen peroxide or tert-butyl hydroperoxide. Cell viability was measured using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Furthermore, the antioxidant property of the extract was evaluated in vitro using hydrogen peroxide and nitric oxide radical-scaveng

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E. C., Moneme,, Onochie, A. U., Onuegbu, M. E., Anyanwu, R. O., Ajakpofo, F. O., and Oladejo, A. A. "In vitro Antioxidant Activity and Free Radical Scavenging Abilities of Ocimum gratissimum Leaf Extract." Journal of Advances in Medical and Pharmaceutical Sciences 27, no. 3 (2025): 54–63. https://doi.org/10.9734/jamps/2025/v27i3758.

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In recent years, researchers have intensified the search for effective, non-toxic, natural edible plants with free radical scavenging activity whose effects are cushioned by antioxidant molecules. This study evaluated the in vitro antioxidant activity and free radical scavenging abilities of Ocimum gratissimum leaf extract. In vitro antioxidant (nitric oxide, Hydrogen Peroxide, Ferric Reducing property and DPPH) activities were determined using standard methods. Results showed that the leaf extract of Ocimum gratissimum considerably scavenges radicals of nitric oxide, hydrogen peroxide and DPP

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Flores-Cruz, Zomary, and Caitilyn Allen. "Ralstonia solanacearum Encounters an Oxidative Environment During Tomato Infection." Molecular Plant-Microbe Interactions® 22, no. 7 (2009): 773–82. http://dx.doi.org/10.1094/mpmi-22-7-0773.

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Ralstonia solanacearum genes that are induced during tomato infection suggested that this pathogen encounters reactive oxygen species (ROS) during bacterial wilt pathogenesis. The genomes of R. solanacearum contain multiple redundant ROS-scavenging enzymes, indirect evidence that this pathogen experiences intense oxidative stress during its life cycle. Over 9% of the bacterium's plant-induced genes were also upregulated by hydrogen peroxide in culture, suggesting that oxidative stress may be linked to life in the plant host. Tomato leaves infected by R. solanacearum contained hydrogen peroxide

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Wu, Yu-Sheng, and Shiu-Nan Chen. "Hydrogen peroxide as a signal induced cellular functions of macrophage in oxidative stress (P5038)." Journal of Immunology 190, no. 1_Supplement (2013): 180.2. http://dx.doi.org/10.4049/jimmunol.190.supp.180.2.

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Abstract Experiments performed to show that one of the respiratory oxygen species, hydrogen peroxide was an attractant factor for macrophage that consequently affects the phagocytosis of macrophage and gene expression. Results obtained from the present study also show that LPS-induced inflammation would cause hepatocytes to produce hydrogen peroxide which subsequently attract macrophage migration to the inflamed region and promote scavenging function. Furthermore, this reaction is suggestive of macrophage interacts with oxidative stress which promotes the transcription factors activity to caus

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Raja, Boobalan, and Kodukkur Pugalendi. "Evaluation of antioxidant activity of Melothria maderaspatana in vitro." Open Life Sciences 5, no. 2 (2010): 224–30. http://dx.doi.org/10.2478/s11535-010-0005-5.

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AbstractIn this study, an aqueous extract of leaves from Melothria maderaspatana was tested for in vitro antioxidant activity. Free radical scavenging assays, such as hydroxyl radical, hydrogen peroxide, superoxide anion radical and 2,2-diphenyl-1-picryl hydrazyl (DPPH), 2,2’-azinobis-(3-ethyl-enzothiazoline-6-sulfonic acid) (ABTS) radical scavenging, and reducing power assay, were studied. The extract effectively scavenged hydroxyl radical, hydrogen peroxide and superoxide anion radicals. It also scavenged DPPH and ABTS radicals. Furthermore, it was found to have reducing power. All concentra

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Reddy, Amala, and Ganesh Venkatayappa. "FREE RADICAL QUENCHING EFFICACY OF VARIOUS EXTRACTS OF C.PICTUS TO COMBAT OXIDATIVE DAMAGE/STRESS: AN IN VITRO STUDY." Asian Journal of Pharmaceutical and Clinical Research 10, no. 2 (2017): 178. http://dx.doi.org/10.22159/ajpcr.2017.v10i2.15011.

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Objectives: The objectives of this research article are to elucidate the antioxidant activity of the sequentially extracted fractions using solvents with a varying range of polarity from the leaves of Costus pictus (Zingiberaceae). The antioxidant efficacy to combat the oxidative stress was evaluated based on their superoxide, hydrogen peroxide, and nitric oxide (NO) scavenging activity of the leaf extract.Methods: Extraction was performed by sequential extraction methods with low to high polar solvents. Using hexane as a low polar, dichloromethane as medium polar, and ethyl acetate and methan

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