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Journal articles on the topic 'Nitricoxide Radical Scavenging Activity'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

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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3

Kayalvizhi, S., SP Kopperundevi, and G. Dhineshraman. "Ovulation Inducing Activity in PCOD Induced Female Wister Albino Rats and In vitro Studies of Free Radical Scavenging Activity of Kadugurogini chooranam (Picrorhiza scrophulariiflora)." Journal of Scientific and Innovative Research 12, no. 3 (2023): 57–60. http://dx.doi.org/10.31254/jsir.2023.12303.

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Siddha system of medicine is oldest traditional system in south India. In these system herbals plays a vital role in prevention and curing the disease. Siddhar’s who told the amazing solution for aging process. Causes of aging are due to increased level of free radicals that damage the major constituents of the cell. Herbals naturally have free radical scavenging activity because Presence of phyto-constiuents like polyphenols generally indicates the rejuvenating properties. The present study also to validate the Estrodial induced PCOS female wistar albino rats to treat with extract of Kaduguro

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Gurusamy, K. "Phytochemical screening of leaf extracts of arka kiran var. of guava." Bangladesh Journal of Botany 52, no. 3 (2023): 783–89. http://dx.doi.org/10.3329/bjb.v52i3.68897.

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In the present study the presence of phytochemicals, and in vitro antioxidant activities of ethanolic leaves extract of Psidium guajava Linn variety namely Arka kiran was investigated.The ethanolic leaf extract of Arka kiran was found to processes secondary metabolites of alkaloids, flavonoids, saponin, phenols and glycosides. Gas Chromatography and Mass Spectroscopy (GCMS) study revealed the presence of therapeutic compounds like octadecenoic acid methyl ester, deoxyspergualin and eicosatrienoicacid. The extract assessed for its α–amylase and α–glucosidase inhibition inhibition at a dose of 2

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Md. Mustafezur, Rahman, Saqueeb, Nazmus, Faruk, Md. Al, Rahman, Md. Arifu, and Sathi, Zakia Sultana. "Free radical scavenging Activity :." DIU Journal of Health and Life Sciences 1, no. 01 & 02 (2014): 137–40. http://dx.doi.org/10.36481/diuhls.v01i1-2.jchbx804.

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The present study was aimed at investigating the chemical profiles of the methanolic extract of leaves of Centella asiatica as well as to assess its antioxidative activity. In this study, a methanolic extract (50 g/L) was obtained by infusion followed by cold maceration for 24 h. The phytochemical screening of the plant extract demonstrated the presence of several classes of compounds like alkaloids, flavonoids, tannins and steroids. The concentration of the plant extract needed for 50% scavenging (IC50) of DPPH was found to be 40.4 μg/ml whereas IC50values for the positive control was found t

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Rahman, Md Mustafezur, Nazmus Saqueeb, Md Al Faruk, Md Arifu Rahman, and Zakia Sultana Sathi. "Free radical scavenging Activity :." DIU Journal of Allied Health Sciences 1, no. 01 & 02 (2014): 137–40. https://doi.org/10.36481/diujahs.v01i1-2.jchbx804.

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The present study was aimed at investigating the chemical profiles of the methanolic extract of leaves of Centella asiatica as well as to assess its antioxidative activity. In this study, a methanolic extract (50 g/L) was obtained by infusion followed by cold maceration for 24 h. The phytochemical screening of the plant extract demonstrated the presence of several classes of compounds like alkaloids, flavonoids, tannins and steroids. The concentration of the plant extract needed for 50% scavenging (IC50) of DPPH was found to be 40.4 μg/ml whereas IC50values for the positive control was found t

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7

Hu-Jun, XIE, MOU Wang-Shu, LIN Fu-Rong, XU Jie-Hui, LEI Qun-Fang, and FANG Wen-Jun. "Radical Scavenging Activity of Myricetin." Acta Physico-Chimica Sinica 29, no. 07 (2013): 1421–32. http://dx.doi.org/10.3866/pku.whxb201304222.

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8

Lopes, Thiago Inácio Barros, Roberta Gomes Coelho, Nídia Cristiane Yoshida, and Neli Kika Honda. "Radical-Scavenging Activity of Orsellinates." CHEMICAL & PHARMACEUTICAL BULLETIN 56, no. 11 (2008): 1551–54. http://dx.doi.org/10.1248/cpb.56.1551.

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9

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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Venkatachalam, Suresh kumar Tirupur, SenthilKumar Palanisamy, Sudhagar Babu та Ranjithkumar Rajamani. "Assesment of free radical scavenging activity and inhibitory properties of aqueous extract of Cymodocea serrulata segrass towards α- glucosidase and α –amylase enzyme". Journal of University of Shanghai for Science and Technology 23, № 12 (2021): 339–60. http://dx.doi.org/10.51201/jusst/21/121035.

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Aim: The study reports the in vitro free radical scavenging and α-amylase and α-glucosidase inhibition activities of aqueous extract of seagrass Cymodocea serrulata from Gulf of Mannar, Southeast Asia. Methods: The free radical scavenging activity was evaluated by DPPH, Superoxide, Nitric oxide and Hydroxyl radical scavenging assays and α-amylase, α-glucosidase enzyme inhibitory activity. The C. serrulata showed effective DPPH radical scavenging activity of 69.45 μg/mL, Superoxide radical scavenging activity of 91.08.5 ± 0.02%, Nitric oxide radical scavenging activity of 86.89 ± 0.03% and Hydr

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11

Yang, Fan, Zhiwei Yang, and Jianbo Xiao. "Radical scavenging activity of crude polysaccharides from Camellia sinensis." Archives of Biological Sciences 63, no. 3 (2011): 717–21. http://dx.doi.org/10.2298/abs1103717y.

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A preparation of crude polysaccharides (TPS) was isolated from Camellia sinensis by precipitation and ultrafiltration. TPS1, TPS2, and TPS3 had molecular weights of 240, 21.4, and 2.46 kDa, respectively. The radical scavenging activities of TPS were evaluated by DPPH free radical, hydroxyl radical and superoxide radical scavenging. These results revealed that TPS exhibited strong radical scavenging activity in a concentration-dependent manner. TPS3 with lowest molecular weight showed a higher radical scavenging activity.

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12

Brabakaran, A., S. Venkatesan, K. R. Jayappriyan, L. Selva Roselin, and N. Thangaraju. "Antioxidant Properties of R-Phycoerythrin from Red Alga Spyridia filamentosa (Wulfen) Harvey Collected on the Pudumadam Coast." Advanced Science, Engineering and Medicine 12, no. 4 (2020): 489–98. http://dx.doi.org/10.1166/asem.2020.2562.

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Natural antioxidants are found in algae, are important biologically active compounds that involve in protecting the cells from oxidation thereby used in defense mechanism on ageing processes and various diseases. In this study, R-Phycoerythrin (R-PE) was extracted from Spyridia filamentosa and was assessed for their antioxidant properties. The antioxidising property of decontaminated R-PE has been evaluated by measuring the free radical scavenging activity by DPPH radical scavenging assay, ABTS radical scavenging activity, hydroxyl radical scavenging activity, superoxide radical (O2) scavengin

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13

Li, Cheng Shuai, Ai Ling Du, and Ai Qin Du. "Influence of pH on Hydroxyl Radical Scavenging Ratio by Gingerol." Advanced Materials Research 781-784 (September 2013): 1265–69. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.1265.

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In this paper, the work was mainly studying influence of pH on Fenton reaction and gingerol scavenging hydroxyl radical. The antioxidant activity of gingerol was characterized by the scavenging hydroxyl ratio and scavenging hydroxyl ratio was analyzed by the spectrophotometry. Hydroxyl radical was produced by Fenton reaction. In the experiment pH and buffer solution have influence on the scavenging hydroxyl radical and Fenton reaction. Gingerol exhibits a strong scavenging radical activity for hydroxyl radical (OH.). The scavenging hydroxyl radical of different extractions of ginger oleoresin

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14

Jin, Weihua, Langlang Ren, Bing Liu, Quanbin Zhang, and Weihong Zhong. "Structural Features of Sulfated Glucuronomannan Oligosaccharides and Their Antioxidant Activity." Marine Drugs 16, no. 9 (2018): 291. http://dx.doi.org/10.3390/md16090291.

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Glucuronomannan oligosaccharides (Gs) were derived from fucoidan, which was extracted from the brown alga Sargassum thunbergii. Sulfated glucuronomannan oligosaccharides (SGs) were obtained by the sulfation of Gs. NMR techniques were used to reveal that the order of sulfation was Man-C6 > Man-C4 > Man-C1R > GlcA-C3 > Man-C3 > GlcA-C2. Finally, the antioxidant activities (hydroxyl radical scavenging activity, superoxide radical scavenging activity, reducing power and DPPH radical scavenging activity) of Gs and SGs were determined. The findings showed that the higher the degree of

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15

Vennila, Lakshmanan, Loordhurani Asaikumar, Subramanian Sivasangari, Dhanasekaran Jayaraj, and Natesan Vijayakumar. "Evaluation of In-Vitro Antioxidant Activity of Biochanin A." Journal of Drug Delivery and Therapeutics 9, no. 4-A (2019): 594–600. http://dx.doi.org/10.22270/jddt.v9i4-a.3404.

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This study was aimed to determine the in vitro antioxidant potential of biochanin A (BCA), an isoflavone phytochemical, by using various free radical scavenging assays. The free radical scavenging activity of BCA was evaluated by various standardized assays such as 1, 1-Diphenyl-2-Picryl Hydrazyl (DPPH●), 2, 2’-Azinobis-3-Ethylbenzothiazoline-6-Sulfonic Acid (ABTS●+), Ferric Reducing Antioxidant Power (FRAP),nitric oxide scavenging activity, reducing ability, hydroxy radical activity, superoxide anion scavenging activity, hydrogen peroxide radical, metal ion chelating activity and phosphomolyb

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16

Wu, Chun, Xin Ping Zheng, and Lin Lin Chen. "Study on Antioxidant Activity of Dihydromyricetin-Zinc(II) Complex." Advanced Materials Research 183-185 (January 2011): 863–67. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.863.

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Dihydromyricetin-zinc(II) complex was synthesized. The scavenging activity of DPPH radical, hydroxyl radical, superoxide anion radical and alkane radical by dihydromyricetin-zinc(II) complex were determine, moreover compared with Vc. The results showed that dihydromyricetin-zinc(II) complex possessed strong scavenging activities on DPPH•, hydroxyl radical, superoxide anion radical and alkane radical with correspounding maximum scavenging rate 74%, 70% , 65% and 50% at the concentration from 0.1 mmol/L to 0.5 mmol/L, respectively, which were higher than Vc. These results suggested that dihydrom

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17

T, Satapathy. "Pre-Clinical Evaluation for Anti-Inflammatory, Antioxidant and Antibacterial Potential of Boswellia seratta." Advances in Pharmacology and Clinical Trials 8, no. 4 (2023): 1–5. http://dx.doi.org/10.23880/apct-16000225.

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Objective: The present study was undertaken to evaluate the anti-inflammatory, anti-oxidant and antibacterial potential of Boswellia serrata extract. Methods: Antioxidant activity was determined using DPPH, Hydroxyl, and Total antioxidant capacity and nitric oxide radical scavenging activities. Anti-inflammatory activity was determined using hyaluronidase enzyme inhibitory assay in which Indomethacin was taken as a reference drug. Agar diffusion was used as a test for antibacterial activity. Grampositive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria were chosen for the

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18

Peksel, Aysegul, Cumali Celik, Nuket Ocal, and Refiye Yanardag. "Antioxidant and radical scavenging activities of some norcantharidin and bridged perhydroisoindole derivatives." Journal of the Serbian Chemical Society 78, no. 1 (2013): 15–25. http://dx.doi.org/10.2298/jsc120123036p.

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A series of norcantharidin and bridged perhydroisoindole derivatives were evaluated for their antioxidant and radical scavenging activities. Different in vitro methodologies such as total reducing power, 1,1-diphenyl-2- picrylhydrazil (DPPH?) free radical scavenging, superoxide anion radical scavenging and metal chelating activities were used. Among 11 compounds tested, 7 compounds showed potent reducing power activity and 8 compounds showed potent superoxide anion radical scavenging activity. All the tested compounds exhibited potent free radical scavenging ability. The results showed that th

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Tatarov, Pavel Gh, Raisa A. Ivanova, and Artur V. Macari. "Shelf-Life Prediction of Plum Foods Using Antioxidant Activity Indices." Chemistry Journal of Moldova 3, no. 2 (2008): 65–69. http://dx.doi.org/10.19261/cjm.2008.03(2).04.

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The reducing activity and radical scavenging activity of hydrosoluble antioxidants in food compositions from plums during the storage were evaluated. The speeds of changing the reducing activity and radical scavenging activity were different. It was observed that the reducing activity diminished by 63.2% after 62...105 days of storage. The same modification of radical scavenging activity determined in vitro was discovered after 110...254 days of storage. Shelf-life of plum foods was calculated using Weibull distribution. The functional relationship of failure probabilities between the reducing

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Shao, Jin, Tong Zhao, Hui-Ping Ma, Zheng-Ping Jia, and Lin-Lin Jing. "Synthesis, Characterization, and Antioxidant Activity of 8-Hydroxygenistein." Natural Product Communications 15, no. 1 (2020): 1934578X2090139. http://dx.doi.org/10.1177/1934578x20901399.

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It was reported that 8-hydroxygenistein (8-OHG) was synthesized by methylation, bromination, methoxylation, and demethylation using cheap and readily available biochanin A as raw material. All synthesized products were structurally confirmed by ultra-high-performance liquid chromatography (UHPLC), infrared spectroscopy, mass spectrometry, 1H-nuclear magnetic resonance (NMR), and 13C-NMR. In addition, we examined the antioxidant capacity of 8-OHG using 6 different methods such as 1,1-diphenyl-2-picrylhydrazyl radical scavenging, 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonate) radical (ABTS) s

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Fu, Wei Na, Tuo Ping Li, You Feng Jia, Zhong Sheng Zhao, Wei Hou, and Ying Chen. "Changes in the Antioxidant Activity of Purple Sweet Potato Wine during Storage." Advanced Materials Research 396-398 (November 2011): 1462–65. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.1462.

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Anthocyanins, which possess strong antioxidant activities, are abundant in purple sweet potato wine. In the present study, changes in the antioxidant activity of purple sweet potato wine during storage were investigated. The results showed that purple sweet potato wine had high 2,2-dipheny-l-picrylhydrazyl (DPPH) free-radical and superoxide-radical scavenging activities, which were stable during storage periods. Compared with these two scavenging activities, the hydroxyl-radical scavenging activity of purple sweet potato wine was concentration-dependent and only presented relatively obvious sc

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22

KHOMDRAM, Sandhyarani Devi, and Potsangbam Kumar SINGH. "Polyphenolic Compounds and Free Radical Scavenging Activity in Eight Lamiaceae Herbs of Manipur." Notulae Scientia Biologicae 3, no. 2 (2011): 108–13. http://dx.doi.org/10.15835/nsb325638.

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Eight plants of Lamiaceae under subfamily Nepetoideae found in Manipur, India were selected for estimation of their polyphenolic compounds and free radical scavenging activity which is expressed on dry weight basis. In this present study, the total phenol and flavonoid contents as well as the free radical scavenging activity were studied using spectrophotometric method. The total phenol content was determined based on Folin-Ciocalteau reagent, flavonoid was determined by aluminium chloride spectrophotometric method and tannin by Folin Dennis Method. The free radical scavenging activity was det

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23

Yadav, Neha, Ajay Pal, Sonam Sihag, and Nagesh C.R. "Antioxidant Activity Profiling of Acetonic Extract of Jamun (Syzygium cumini L.) Seeds in Different In-Vitro Models." Open Food Science Journal 12, no. 1 (2020): 3–8. http://dx.doi.org/10.2174/1874256402012010003.

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Background: Syzygium cumini L., commonly known as Jamun, black-plum, and Indian blackberry, is one of the most widely distributed trees in India with booming medical benefits and possesses antioxidant, anticancer and anti-diabetic properties. It belongs to the family Myrtaceae. Despite countless phytochemicals, seeds are not consumed and are the waste part of Jamun fruit. Objective: The objective of this study was to evaluate the antioxidant capacity of phenolics from Jamun seeds against a bundle of oxidant moieties. Methods: The 50% acetone extract of Jamun seeds was investigated for in-vitro

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24

Surinut, P., S. Kaewsutthi, and R. Surakarnkul. "RADICAL SCAVENGING ACTIVITY IN FRUIT EXTRACTS." Acta Horticulturae, no. 679 (February 2005): 201–3. http://dx.doi.org/10.17660/actahortic.2005.679.25.

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25

Shukla, Sangita, Sandip Patel, and Veena Patel. "Free Radical Scavenging Activity ofGrangea maderaspatanaPoir." Pharmacognosy Magazine 5, no. 20 (2009): 381. http://dx.doi.org/10.4103/0973-1296.58156.

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Liu, Ping, Yun Tao Gao, Jiao Jiao Yu, et al. "DPPH Radical Scavenging Activity of Kaempferol." Advanced Materials Research 781-784 (September 2013): 1294–97. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.1294.

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The UV-Vis absorption spectrum of kaempferol and DPPH was investigated, the optimum determination wavelength and reaction time for determining the DPPH radical scavenging activity of kaempferol was 517 nm and 30 min, respectively. Kaempferol exhibited strong DPPH radical scavenging activity with a IC50 value of 0.004349 mg·mL-1, which is smaller than that of rutin, indicating that kaempferol has a stronger antioxidant activity than rutin.

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Agrawal, Surendra S., and Gokul S. Talele. "Free radical scavenging activity ofCapparis zeylanica." Medicinal Plants - International Journal of Phytomedicines and Related Industries 1, no. 2 (2009): 109. http://dx.doi.org/10.5958/j.0975-4261.1.2.014.

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Ichikawa, Hisatsugu, Kazue Satoh, Takashi Tobe, et al. "Free radical scavenging activity of propolis." Redox Report 7, no. 5 (2002): 347–50. http://dx.doi.org/10.1179/135100002125000965.

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Rafat Husain, S., Josiane Cillard, and Pierre Cillard. "Hydroxyl radical scavenging activity of flavonoids." Phytochemistry 26, no. 9 (1987): 2489–91. http://dx.doi.org/10.1016/s0031-9422(00)83860-1.

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Je, Jae-Young, Pyo-Jam Park, and Se-Kwon Kim. "Radical scavenging activity of hetero-chitooligosaccharides." European Food Research and Technology 219, no. 1 (2004): 60–65. http://dx.doi.org/10.1007/s00217-004-0881-x.

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Kunchandy, Elizabeth, and M. N. A. Rao. "Oxygen radical scavenging activity of curcumin." International Journal of Pharmaceutics 58, no. 3 (1990): 237–40. http://dx.doi.org/10.1016/0378-5173(90)90201-e.

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Salim-Hanna, Marta, Eduardo Lissi, and Luis A. Videla. "Free Radical Scavenging Activity of Carnosine." Free Radical Research Communications 14, no. 4 (1991): 263–70. http://dx.doi.org/10.3109/10715769109088955.

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T. S, Vishnu, and Palaniswamy M. "Systematic Approach on Evaluating the in vitro Antioxidant Activity of Violacein; Novel Isolate Chromobacterium Vaccinii CV5." Biomedical and Pharmacology Journal 11, no. 2 (2018): 703–9. http://dx.doi.org/10.13005/bpj/1423.

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Violacein was isolated from Chromobacterium vaccinii CV5, a Gram negative bacterium collected from the Well water near a paddy field- Nedumangadu, Kerala, India. In the current antioxidant study, the activities of violacein were analyzed by different scavenging assay. In vitro antioxidant activity of violacein pigment was studied with the antioxidant, hydrogen peroxide DPPH, nitric oxide, hydroxyl and superoxide. The results suggest that the violacein possess potent activity of antioxidant against DPPH, superoxide, nitricoxide, hydrogen peroxide and hydroxyl with IC50 values of 297.88 µg/mL, 3

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Shimizu, Wakana, Yoshimi Shoji, Kei Ohkubo, Hiromu Ito, Ikuo Nakanishi, and Kiyoshi Fukuhara. "Antioxidant Activity of Planar Catechin Conjugated with Trolox." Antioxidants 13, no. 10 (2024): 1165. http://dx.doi.org/10.3390/antiox13101165.

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Planar catechin (PCat), a natural antioxidant with a fixed 3D catechin structure on a plane, exhibits radical-scavenging activity approximately five times stronger than the conventional catechin. We synthesized a compound, PCat-TrOH, by binding Trolox (TrOH), an α-tocopherol analog, to PCat to enhance its antioxidant effect against oxidative stress, such as lipid peroxidation. TrOH shows radical-scavenging activity about 6.5 times greater than PCat, and PCat-TrOH exhibited a similar level of radical-scavenging activity to TrOH. Additionally, PCat-TrOH demonstrated twice the radical-scavenging

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Choi, Hyun-suk, and DuBok Choi. "Antioxidant and Xanthine oxidase inhibitory activities of the tea (Camellia sinensis) flower." Association for International Tea Culture 65 (September 30, 2024): 223–50. http://dx.doi.org/10.21483/qwoaud.65..202409.223.

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The major purpose of this study was to investigate the DPPH radical scavenging activity, hydroxyl radical scavenging activity, superoxide radical scavenging activity, reducing power, ferrous ion chelating activity, and xanthine oxidase activity for research of antioxidant and xanthine oxidase inhibitory activities using a variety of extracts of tea (Camellia sinensis) flower. Among the several extracts, when 800 μg/mL of the ethanol extract was used, the maximum DPPH radical scavenging activity was obtained, 79.2%, which was approximately 80.8% compared to L-ascorbic acid, the maximum hydroxyl

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Aremu, Oluwole S., Lebogang Katata-Seru, Olukayode O. Aremu, Constance R. Sewani-Rusike, and Neil Koorbanally. "Determination of radical scavenging activities of some pyrimidine derivatives." Tropical Journal of Pharmaceutical Research 19, no. 1 (2020): 45–49. http://dx.doi.org/10.4314/tjpr.v19i1.7.

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Purpose: To synthesize some pyrimidine derivatives and investigate their radical scavenging activities. Methods: A series of newly pyranopyrimidines derivatives and dithiopyridopyrimidinediones were synthesized by condensation of barbituric acid, malononitrile and different substituted benzaldehydes reacted with 1,4-Diazabicyclo[2.2.2] octane (DABCO) as a base. Compounds P1-7 (series 1), S1-11 (series 2) Scheme 1 and 6-amino-2-thiouracil with aromatic aldehydes in glacial acetic acid under reflux J1-13 (series 3) Scheme 2. 1H & 13C NMR, CHN, GC-MS and IR were used to characterize the

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Choudhary, N. K., J. Dwivedi, and S. Sharma. "IN VITRO ANTIOXIDANT AND ALPHA-AMYLASE, ALPHA-GLUCOSIDASE INHIBITORY ACTIVITY OF FLOWERS OF CALOTROPIS GIGANTEA." INDIAN DRUGS 51, no. 10 (2014): 38–42. http://dx.doi.org/10.53879/id.51.10.10104.

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The present investigations were carried out to evaluate the in vitro antioxidant as well as antidiabetic activity of flowers of Calotropis gigantea. Different extracts (petroleum ether, chloroform and ethanolic extract) were prepared using successive solvent extraction method (soxhlet) and screened for its in vitro antioxidant activity using Diphenyl picryl hydrazyl (DPPH) radical scavenging activity, ABT S radical cation decolorization assay and nitric oxide (NO) radical scavenging activity and IC50 were calculated. In vitro antidiabetic activity was studied using α – amylase and α – glucosid

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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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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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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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MOHD ZAIN, FATIN ARINA, NORSHAZILA SHAHIDAN, NURUL HUDA, ZARINAH ZAKARIA, and ABDI WIRA SEPTAMA. "ANTIOXIDANT ACTIVITY OF BIOACTIVE PEPTIDE DERIVED FROM PEKIN DUCK FEET GELATIN HYDROLYSATE." Malaysian Applied Biology 49, no. 4 (2021): 19–24. http://dx.doi.org/10.55230/mabjournal.v49i4.1563.

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Malaysia is one of the main producers of duck meat globally with increasing demands. Increasing in duck production will also increase the number of duck by-products such as skin, feet and bones. Pekin duck (Anas platyrhyncos domestica) is one of the famous duck breeds. Gelatin that was extracted from Pekin duck feet has shown a potential raw material for the production of bioactive peptide that can involve in various functions of the organism physiologically for example antioxidant effects. Pekin Duck feet gelatin was hydrolyzed by using five commercial enzymes (Alcalase, Esperase, Flavourzyme

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Ashok, Praveen Kumar, Poonam Rishishwar, and Kumud Upadhyaya. "Free Radical Scavenging Activity of Aerial Parts of Artemisia pallens in Mediating Hepatoprotective Activity of RIF+INH Intoxicated Rats." International Journal of Pharmacology, Phytochemistry and Ethnomedicine 14 (November 2019): 1–15. http://dx.doi.org/10.18052/www.scipress.com/ijppe.14.1.

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To investigate the free radical scavenging & hepatoprotective activity of phenolic rich fraction of Artemisia pallens on RIF+INH induced oxidative stress in Sprague dawley rats. Free radical scavenging and hepatoprotective activity was evaluated by using DPPH, Nitric oxide, Superoxide radical and Hydroxyl radical assay models and induced RIF+INH intoxicated rats. The total phenolic content was found to be 312.60 μg gallic acid equivalents (GAE)/gm of dry extract. The total flavonoid content was found to be 322.20 μg rutin equivalents (RUE)/gm of dry extract. In the current study, free radi

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Zhu, Zhen, Hua Yin, and Yan An. "Antioxidant Activity of Silk Fibroin Peptide Hydrolyzed by Pancreatin." Advanced Materials Research 1081 (December 2014): 110–14. http://dx.doi.org/10.4028/www.scientific.net/amr.1081.110.

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This research adopts the pancreatin hydrolysis of silk fibroin active peptide, evaluate the antioxidant activity of hydrolysates. In the process of hydrolysis of silk fibroin, by measuring the amino nitrogen content of neutral formaldehyde titration method. Find the amino nitrogen content gradually stabilized at around 0.37g/L, and superoxide free radical scavenging rate changing with time fluctuation trend, superoxide free radical scavenging rate to a maximum of 65.03% at 220min.The use of silk fibroin hydrolysis process optimization,reaction time 160min, enzyme concentration4% , substrate co

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Ramayani, Septiana Laksmi, Fitria Rohmawati, and Yasmine Savira Rahmadani. "The effect of Material to Solvent Ratio to The Flavonoid Content and Free Radical Scavenging Activity of Extract of Morinda Citrifolia L Leaves." Jurnal Jamu Indonesia 7, no. 2 (2022): 56–61. https://doi.org/10.29244/jji.v7i2.245.

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The flavonoid compound in Noni leaves (Morinda citrifolia) are efficacious as free radical scavengers. This research aimed to know the influence of the ratio of materials and a solvent (M:S=1:10; M:S=1:15; M:S=1:20) on the flavonoid content and free radical scavenging activity of extract of noni leaves. Extraction was carried out using the Microwave Assisted Extraction method and the free radical scavenging activity were determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH). The results showed that the material-solvent ratio had a significant effect on the yield, total flavonoid content, and free

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Ng, S. P., R. Ramanathan, and X. J. Chong. "The effect of cooking duration on radical scavenging properties of Hypsizygus tessellatus and Pleurotus ostreatus." Supplementary 1 6, S1 (2022): 75–79. http://dx.doi.org/10.26656/fr.2017.6(s1).013.

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Mushrooms are a popular ingredient in the human diet due to their flavour, nutritional values and functional properties, in particular, their antioxidant potential. Most mushrooms are consumed after cooking and the impact of cooking methods and durations on the antioxidant properties of various edible mushrooms have been reported. However, the reports on the effect of cooking on the antioxidant properties of Hypsizygus tessellatus (shimeji), a widely consumed mushroom in East Asia, are limited. Therefore, this study aimed to investigate the effect of cooking duration on the radical scavenging

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William, Helen, and Narayanan N. "COMPARATIVE EVALUATION OF ANTIOXIDANT ACTIVITY OF SUBSTITUTED FLAVONES." Asian Journal of Pharmaceutical and Clinical Research 10, no. 11 (2017): 288. http://dx.doi.org/10.22159/ajpcr.2017.v10i11.18973.

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Objective: The flavonoids are a heterogeneous group of plant polyphenols that are endowed with several biological activities including antioxidant, anti-inflammatory, immunomodulatory, antiviral, antimutagenic, and anticarcinogenic properties. They are believed to interfere with the various free radical-producing systems and they also enhance the functions of endogenous antioxidants. The aim of this study was to compare the antioxidant activity of synthesized substituted flavones by various free radical scavenging assays.Methods: The flavones used in the study, 6,3’,4’ - trihydroxy flavones (T

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Zhao, Tao, Hong Yang, Yong Feng Li, Jing Li Xu, and Mao Qun Yu. "In Vitro Studies on the Radical Scavenging Activity of Hulless Barley Pigment." Advanced Materials Research 183-185 (January 2011): 145–50. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.145.

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In the present study, the in-vitro scavenging activities of hydroxyl, superoxide anion and DPPH radical of hulless barley pigment were studied. The results indicated that hulless barley pigment had excellent radical scavenging activity which was equivalent to the standard antioxidant, vitamin C. It was found that the radical scavenging effect of hulless barley pigment is gradually strengthened along with the increasing of concentration. In the range of test concentration, the maximum scavenging rate of the pigment to hydroxyl, superoxide anion and DPPH radical was 92.9%, 90.6% and 88.3% and th

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Swathi, Naraparaju, and Thirumurthy Durai Ananda Kumar. "Insights into Thiazolidinedione Analogues: Unveiling Antioxidant Activity through Descriptor-Based Quantitative Structure-Activity Relationship Investigations." Asian Journal of Applied Chemistry Research 15, no. 1 (2024): 1–11. http://dx.doi.org/10.9734/ajacr/2024/v15i1277.

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Background: Diabetes mellitus, a chronic metabolic disorder is characterized by defective insulin secretion (β-cell dysfunction), insulin action (insulin resistance) and reduced bio-antioxidant potential. Antioxidants play key role in diabetes by reducing the oxidative stress and alleviating diabetic complications. Thiazolidinediones (TZDs) attenuate insulin resistance and produce antioxidant effect. Study Design: In continuation of our goal to develop thiazolidine-2,4-dione analogues that can address both oxidative stress and Type 2 diabetes, the in vitro antioxidant potential of a few synthe

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Alphonse, Dr Arockia Jenecis, M. Shantha, S. Rega, and Arockia Badhsheeba. "In Vitro Antioxidant Activity Of Red Seaweeds Of Methanolic Extracts From Rameshwaram Coast." International Journal of Environmental Sciences 11, no. 8s (2025): 759–66. https://doi.org/10.64252/nad3q962.

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Natural extracts of marine macroalgae are widely recognized for their antioxidant.The aim of this study was to evaluate the antioxidant activity of methanolic extracts of two marine algae, Haloplegma duperreyi and Halymenia floresii. The extracts were assayed, DPPH free radical scavenging capacity, Hydroxyl and ABT+ radical scavenging assay in both algae. Methanolic extracts of both algae were found to exhibit significant antioxidant activity. Among two seaweeds, Haloplegma duperreyi exhibited a good capacity for DPPH free radical scavenging capacity, Hydroxyl and ABT+ radical scavenging assay

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