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2 edition of free radical scavenging system in overcoming phytotoxicity and breaking dormancy found in the catalog.

free radical scavenging system in overcoming phytotoxicity and breaking dormancy

Liping Zhen

free radical scavenging system in overcoming phytotoxicity and breaking dormancy

by Liping Zhen

  • 247 Want to read
  • 3 Currently reading

Published .
Written in English

    Subjects:
  • Dormancy in plants.,
  • Phytotoxins.,
  • Free radicals (Chemistry)

  • Edition Notes

    Statementby Liping Zhen.
    The Physical Object
    Pagination175 leaves, bound. :
    Number of Pages175
    ID Numbers
    Open LibraryOL15207544M

    Free radical-scavenging activity of Crassostera gigas extract (JCOE) T Yoshikawa, Y Naito, K Masui, T Fujii, Y Boku, S Nakagawa, solution may stimulate the endogenous eliminating system against hydrogen peroxide. free radical I scavenger I electron paramagnetic resonance Free radical-scavenging activity of Crussostera gigas extract Free radicals are highly reactive oxygen species that are capable of damaging molecules such as DNA, protein and carbohydrates. The body is under constant attack from these free radicals formed as a consequence of the body’s normal metabolic activity (Surai, ). Some free radicals likesinglet oxygen (O 2)superoxide (O 2.), hydroxyl ( Size: KB.

    (version for JES-FR30) connected to the Free Radical Monitor. Methods for spin trapping of hydroxyl and superoxide radicals were based on earlier reports []. Hydroxyl radical scavenging activity Hydroxyl radical scavenging activity was estimated essentially according to the method of Liu et al. [10].Cited by:   The reduction of DPPH radicals was determined by measuring the absorption at nm. The radical scavenging activity was calculated as a percentage of DPPH discoloration using the following equation: DPPH radical scavenging % = [(A 0 – A 1)/A 0] × Where A 0 is the absorbance of the DPPH solution and A 1 is the absorbance of the sample.

    International Journal of Pharmaceutics, 58 () Eisevier UP Note Oxygen radical scavenging activity of curcumin Elizabeth Kunchandy and M.N.A. Rao * Department of Pharmaceutical Chemistry, College of Pharmaceutical by: μg/mL, in total antioxidant assay, DPPH radical scavenging assay and superoxide radical scavenging assay, it showed maximum inhibition of , , and % respectively. These results clearly indicate that W. volubilis is effective in scavenging free radicals and has potential to be powerful antioxidant ability.


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Free radical scavenging system in overcoming phytotoxicity and breaking dormancy by Liping Zhen Download PDF EPUB FB2

Graduate Thesis Or Dissertation The free radical scavenging system in overcoming phytotoxicity and breaking dormancy Public Deposited. Analytics × Add to Author: Liping Zhen. The free radical scavenging system in overcoming phytotoxicity and breaking dormancy.

Abstract. Graduation date: Hydrogen cyanamide (CY) induced earlier budbreak, more\ud uniform and a higher percentage of budbreak in resting\ud poplar (Populus alba x P. gradidentata, NC ) plants.\ud However, it was phytotoxic to poplar when. The Free Radical Scavenging System in Overcoming Phytotoxicity and Breaking Dormancy by Liping Zhen A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the degree of Doctor of Philosophy Completed December 9, Commencement June Keywords: Free radicals, Oxidative stress, Anti-aging, Antioxidants, Pathological aging, Hydocotyle vulgaris L.

Abstract. Pathological aging due to harmful free radicals and oxidative stress has been a serious threat to human health. Thus, the study aimed to evaluate the free radical scavenging activity,Author: Romnick M.

Ureta, Siegfred M. Mejico, Yvonne Maranan. Free radical chemistry is characterized by an unregulated chain reaction of sequential oxidations and reductions that can rapidly amplify the concentration of reactive radicals.

The free radical is defined by the occurrence of an unpaired electron in an organic molecule or metal ion (Halliwell & Gutteridge, ).Cited by: different central nervous system (CNS) disorders, especially in the conditions of stress and neurodegenerative diseases.

Five different extracts of Withania somnifera root were scrutinized to unfold the antioxidant and free radical scavenging activity. In the present study, the free radical scavenging potential of five extracts of the root. DPPH free radical scavenging assay The free radical scavenging activity of the extract was measured using DPPH by the method of Blios ().

A mM solution of tion was added to 3 ml of various concentrations ( to mg/ml) of sample dissolved in methanol to be tested. After 30 min, absorbance was measured at nm.

Hydroxyl radical scavenging activity The hydroxyl radical scavenging activity was determined according to the method of Beara et al with some modification.

2 mL of extract solution (,and mg mL-1), mL of ortho-phenanthroline ( mmol L File Size: KB. Free Radical Biology and Medicine52 (2), DOI: /dbiomed Annia Galano. Mechanism and kinetics of the hydroxyl and hydroperoxyl radical scavenging activity of N-acetylcysteine amide.

Theoretical Chemistry Accounts(1), DOI: /sCited by: FREE RADICAL SCAVENGING ACTIVITIES OF EXTRACTS AND BIOACTIVE CONSTITUENTS FROM THE ROOTS OF PLUMBAGO ZEYLANICA (LINN.) Ajayi Gabriel O.1*, Ademuyiwa Oladapo2, Lasisi Aliyu A.3, Olagunju Joseph A.1 1Department of Medical Biochemistry, Faculty of Basic Medical Sciences, Lagos State.

Procedure for free radical scavenging activity The ability of the extracts to annihilate the DPPH radical (1,1-diphenilpicrylhydrazyl) was investigated by the method described by (Blois, ).

Stock solution of the whole plant extracts was prepared to the concentration of 1. Statistical analysis (test of significance) of the data obtained from the free radical scavenging activity of plant extract and BHA using T-test (Paired two sample for means) showed that the difference between the free radical scavenging activities of plant extract and BHA on the natural ROS used, was significant (PCited by: 5.

2 The Antioxidant and Free Radical Scavenging Activities of Chlorophylls and Pheophytins. Figure 1. Structures of chlorophylls a and b and pheophytins a and b.

[13,14], or the stimulation of cellular defenses [15]. This paper presents data on the anti-oxidant and chela- tion File Size: KB. The antioxidant and free radical scavenging activity of the ethanol extracts of Melia dubia Hiern., Albizia lebbeck (L.) Benth., Brassica oleracea L.

var. botrytis (broccoli) and Glycyrrhiza glabra L. were evaluated. The total phenolic content of the extracts was found to be higher in A.

lebbeck (%) and lower in broccoli (%). The. The free radical scavenging potential of the plant Alocasia indica(Linn.) was studied by using different antioxidant models of screening like scavenging of 1,1-diphenylpicryl hydrazyl radical, nitric oxide radical, superoxide anion radical, hydroxyl radical, iron chelating activity, total antioxidant capacity, non-enzymatic glycosylation of haemoglobin, rapid screening for antioxidant compounds by thin layer.

In furtherresearch is planned to analyze indicators of free radical oxidation system antioxidation protection and reparative ability of the skin when used sutures and biological glue in rats with.

Structure-Radical Scavenging Activity Relationships of Flavonoids Dragan Ami},a,* Du{anka Davidovi}-Ami},a Drago Be{lo,a and Nenad Trinajsti}b aFaculty of Agriculture, The Josip Juraj Strossmayer University, P.O.

BoxHR Osijek, Croatia bThe Rugjer Bo{kovi} Institute, P.O. BoxHR Zagreb, Croatia RECEIVED MA ; REVISED OCTOBER 4, ; ACCEPTED. sample. Free radical scavenging activity as determined using 2,2-Diphenylpicryl-hydrazyl radical (DPPH) indicated IC 50 of sample to be mg/ml as compared to mg/ ml for standard Vit.C.

This indicates that plant has high antioxidant properties and hence it has huge potential to be used in treatment of various ailments. Free-radical scavenging activities in Drymaria diandra Blume MATERIALS AND METHODS. Plant materials. diandra (Abijal) was collected from three different places of plain land: NBU (26º42´69´´N, 88º21´´´E, ft from amsl), NBU Gate No.

3 (26 º42´´´N, ´´´E, ft from amsl) and NBU Nibedeita (26 º42´´´N, ´´´E, ft. Hydroxyl radical scavenging ability: The Fenton reaction was used to generate hydroxyl radicals in a test system, and the free radical scavenging activity was determined by the degradation of deoxyribose, as standardized by Elizabeth and Rao (20).

The hydroxyl radicals attack deoxyribose and initiate a series of. associated with free radical removal by activated peroxide-scavenging system, but it is unclear whether this is a simple correlation or a casual relations hip (Rowland & Arora, ).Hindered amine light stabilizers (HALS), introduced in the s, function mainly as free radical scavengers, although they also may act as quenchers or peroxide decomposers.

They dominate the market for light stabilizers and are now also used as thermal antioxidants.diphenylpicrylhydrazyl (DPPH) free radical scavenging assay. The ethanolic extract exhibited higher free radical scavenging effect than the water extract at all tested concentrations.

Above µg/ml, the ethanolic extract showed 80% scavenging activity, similar to control antioxidant compounds quercetin, rutin and L-ascorbic acid.