scholarly journals AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOID DARI KULIT BATANG LEGUNG (Vitex pinnate Tour ex Linn) DENGAN METODA TIOSIANAT

2011 ◽  
Vol 1 (2) ◽  
pp. 33-38
Author(s):  
Musyirna Rahmah Nasution ◽  
Dasni Syafril ◽  
Yuharmen
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Vitamin C ◽  
Methanol Extract ◽  
Radical Reactions ◽  
Flavonoid Compound ◽  
Free Radical Reactions ◽  
Antioxidant Potency

Antioxidant are the compounds capable to inhibit free radical reactions in the human body.This research was aimed to identify the antioxidant potency of flavonoid compound of extract metanol of legung bark (Vitex pinnate Tour ex Linn) by using linoleic-tyocyanate methods.The result suggested, that isolated flavonoid of methanol extract was produced five fraction and most of fraction conducted antioxidant activity more less than α-tokoferol. But, Two Fraction which is recristalization was the higer than α-tokoferol and vitamin C

Effect of O -glycosilation on the antioxidant activity and free radical reactions of a plant flavonoid, chrysoeriol

2003 ◽  
Vol 11 (13) ◽  
pp. 2677-2685 ◽  
Author(s):  
Beena Mishra ◽  
K.Indira Priyadarsini ◽  
M.Sudheer Kumar ◽  
M.K. Unnikrishnan ◽  
Hari Mohan
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Radical Reactions ◽  
Free Radical Reactions

Antioxidant activity of free radical reactions inhibitors, applied to the dressing material for wound healing

2007 ◽  
Vol 1 (1) ◽  
pp. 45-52 ◽  
Author(s):  
G. I. Klebanov ◽  
O. B. Lyubitsky ◽  
S. E. Il’ina ◽  
E. O. Medusheva ◽  
V. V. Ryltsev ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Wound Healing ◽  
Free Radical ◽  
Radical Reactions ◽  
Free Radical Reactions

scholarly journals ANTIOXIDANT ACTIVITY OF RED ROSE LEAVES (Rosa chinensis Jacq.) EXTRACT

2021 ◽  
Vol 3 (2) ◽  
pp. 81-88
Author(s):  
Deviyanthi Nur Afifah ◽  
Yessy Yessy ◽  
Farida Nur Rahmani ◽  
Ayu Lia Ningsih ◽  
Citra Dewi Puspita Sari ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Activity Index ◽  
Radical Reactions ◽  
Dpph Assay ◽  
Free Radical Reactions ◽  
Rosa Chinensis ◽  
Ic50 Value ◽  
Hexane Extracts

Background: Background: Antioxidants are compounds that can neutralize free radical reactions. The red rose leaves (Rosa chinensis Jacq.), usually disposed of as waste, have been shown to have antioxidant activity. Objective: This study aims to determine the antioxidant activity of red rose leaves extracts. Methods: The red rose leaves were extracted by the maceration method in ethanol, methanol, ethyl acetate, and n-hexane. The antioxidant activity was measured by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and was expressed as IC50 and an antioxidant activity index (AAI).Results: The results showed that the red rose leaves ethanol, methanol, ethyl acetate, and n-hexane extracts had an antioxidant activity with an IC50 value of 1.8, 8.7, 210.3, 48.7 µg/mL, respectively, and an AAI value of 17.3, 3.5, 0.1, 0.6, respectively. The main content of ethanol and methanol extracts are flavonoid, saponin, and tannin.Conclusion: The ethanol and methanol extract showed the most potent antioxidant activity.

Role of phenolic O-H and methylene hydrogen on the free radical reactions and antioxidant activity of curcumin

2003 ◽  
Vol 35 (5) ◽  
pp. 475-484 ◽  
Author(s):  
K.Indira Priyadarsini ◽  
Dilip K. Maity ◽  
G.H. Naik ◽  
M.Sudheer Kumar ◽  
M.K. Unnikrishnan ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Radical Reactions ◽  
Free Radical Reactions

scholarly journals Characteristics of certain drugs with antioxidant activity and their use in tuberculosis treatment

2020 ◽  
Vol 98 (4) ◽  
pp. 58-64
Author(s):  
L. A. Shovkun ◽  
D. A. Kudlay ◽  
N. Yu. Nikolenko ◽  
E. D. Kampos
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Pulmonary Tuberculosis ◽  
Inflammatory Reaction ◽  
Clinical Symptoms ◽  
Tuberculosis Treatment ◽  
Radical Reactions ◽  
Free Radical Reactions ◽  
Tuberculosis Patients

The review presents methods for management of free radical reactions in pulmonary tuberculosis patients which are of great importance for relief of clinical symptoms, pathomorphological changes, and the outcome of the disease. It describes the effect of various antioxidant drugs on the course of tissue inflammatory reaction and the development of destructive changes in the lungs.

The initial reaction mechanism and thermal sensitivity of a fluoropolymer-containing energetic molecular system: the coupling effect of interfacial interactions and free radical reactions

CrystEngComm ◽  
2021 ◽  
Vol 23 (16) ◽  
pp. 3006-3014
Author(s):  
Wen Qian
Keyword(s):  
Free Radical ◽  
Coupling Effect ◽  
Molecular System ◽  
Thermal Sensitivity ◽  
Radical Reactions ◽  
Initial Reaction ◽  
Interfacial Interactions ◽  
Free Radical Reactions ◽  
Molecular Systems ◽  
Reactive Molecular Dynamics

A strategy combining classic and reactive molecular dynamics is applied to find the coupling effect of interfacial interactions and free radical reactions during the initial thermal decomposition of fluoropolymer-containing molecular systems.

Further studies on free-radical pathology in the major central nervous system disorders: effect of very high doses of methylprednisolone on the functional outcome, morphology, and chemistry of experimental spinal cord impact injury

1982 ◽  
Vol 60 (11) ◽  
pp. 1415-1424 ◽  
Author(s):  
H. B. Demopoulos ◽  
E. S. Flamm ◽  
M. L. Seligman ◽  
D. D. Pietronigro ◽  
J. Tomasula ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Central Nervous System ◽  
Nervous System ◽  
Free Radical ◽  
Tissue Injury ◽  
Functional Restoration ◽  
Radical Reactions ◽  
Free Radical Reactions ◽  
Cord Injury

The hypothesis that pathologic free-radical reactions are initiated and catalyzed in the major central nervous system (CNS) disorders has been further supported by the current acute spinal cord injury work that has demonstrated the appearance of specific, cholesterol free-radical oxidation products. The significance of these products is suggested by the fact that: (i) they increase with time after injury; (ii) their production is curtailed with a steroidal antioxidant; (iii) high antioxidant doses of the steroidal antioxidant which curtail the development of free-radical product prevent tissue degeneration and permit functional restoration. The role of pathologic free-radical reactions is also inferred from the loss of ascorbic acid, a principal CNS antioxidant, and of extractable cholesterol. These losses are also prevented by the steroidal antioxidant. This model system is among others in the CNS which offer distinctive opportunities to study, in vivo, the onset and progression of membrane damaging free-radical reactions within well-defined parameters of time, extent of tissue injury, correlation with changes in membrane enzymes, and correlation with readily measurable in vivo functions.

Solvent Effects on the Oxidative Free Radical Reactions of 2-Amino-1,4-naphthoquinones.

ChemInform ◽  
2005 ◽  
Vol 36 (14) ◽  
Author(s):  
Chao-Ming Tseng ◽  
Yi-Lung Wu ◽  
Che-Ping Chuang
Keyword(s):  
Free Radical ◽  
Solvent Effects ◽  
Radical Reactions ◽  
Free Radical Reactions
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