A comparative study on the antioxidant properties of bractein and cernuoside by the DFT method

This study aimed at evaluating effective methods for breaking the hard and insoluble spores of Ganoderma lucidum to recover functional biomolecules. Rupture techniques were evaluated such as manual maceration (RM), maceration with spheres of various materials (BR), and microwave exposure plus maceration with steel/chrome spheres (MBR1). Spore rupture was evaluated using UV-Vis spectroscopy, which showed vibrations of 2955, 1642, 1240, 1080 and 1746 cm-1 corresponding to changes in spore walls. The MBR1 extract contained the largest amounts of carbohydrates (19.80 mg.g-1 spores) and polyphenols (2.21 mg.g-1 spores), whereas the BR extract had higher antioxidant activity (57.22%Inb DPPH). The MBR1 and BR extracts contained 62.2 and 73.5% glucose, respectively. Both methods also involved significant extraction of carbohydrates and proteins. The best way to extract biomolecules from spore walls is to perform a microwave heat treatment and break the walls with steel/chrome spheres; this produces large quantities of carbohydrates with antioxidant properties.

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Anti‐cholinesterase and antioxidant properties of alkaloid and phenolic‐rich extracts from pawpaw ( Carica papaya ) leaf: A comparative study

Flavour and Fragrance Journal ◽

10.1002/ffj.3615 ◽

2020 ◽

Vol 36 (1) ◽

pp. 47-54 ◽

Cited By ~ 1

Author(s):

Bukola C. Adedayo ◽

Sunday I. Oyeleye ◽

Bathlomew M. Okeke ◽

Ganiyu Oboh

Keyword(s):

Comparative Study ◽

Carica Papaya ◽

Antioxidant Properties

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A Comparative Study on Antioxidant Properties of Two Phyllanthus Species Growing in Bangladesh

Dhaka University Journal of Pharmaceutical Sciences ◽

10.3329/dujps.v11i2.14579 ◽

2013 ◽

Vol 11 (2) ◽

pp. 191-197 ◽

Cited By ~ 4

Author(s):

Ishrat Nimmi ◽

Ismet Ara Jahan ◽

M Hemayet Hossain ◽

Mohammad Burhan Uddin ◽

M Sohel Rana ◽

...

Keyword(s):

Comparative Study ◽

Methanol Extract ◽

Antioxidant Activities ◽

Radical Scavenging Activity ◽

Antioxidant Properties ◽

Radical Scavenging ◽

Reducing Power ◽

Test Methods ◽

Total Phenolic ◽

Solvent Volume

A comparative study of antioxidant properties on two varieties of Phyllanthus (Phyllanthus niruiri L. & Phyllanthus urinaria L. leaves) growing in Bangladesh was done in the present study. Five complimentary test methods namely DPPH free radical scavenging activity, reducing power assay, total antioxidant capacity, total phenolic and flavonoid contents determination were used for the evaluation of antioxidant properties of two species of Phyllanthus. In the present investigation for the evaluation of antioxidant activities the concentration is expressed by the ratio of crude sample per solvent volume instead of extract weight per solvent volume. Based on these concentrations the investigated P. niruri L. and P. urinaria L. leaves extracts exhibited significant results. At 2 mg/ml concentration DPPH radical scavenging capacity of the methanol extract of both the plants was found to show significant (>90%) activity which is comparable to Ascorbic acid and BHA. In case of reducing power tests for both the extract, the activity of P. urinaria is comparable to that of BHA and AA and that of P. niruiri is comparable to BHA. P. niruiri showed better antioxidant potential than that of P. urinaria based on the observed results of their corresponding methanol extract. DOI: http://dx.doi.org/10.3329/dujps.v11i2.14579 Dhaka Univ. J. Pharm. Sci. 11(2): 191-197, 2012 (December)

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A Comparative Study on Some Functional and Antioxidant Properties of Kilka Meat, Fishmeal, and Stickwater Protein Hydrolysates

Journal of Aquatic Food Product Technology ◽

10.1080/10498850.2018.1500503 ◽

2018 ◽

Vol 27 (7) ◽

pp. 844-858 ◽

Cited By ~ 6

Author(s):

Mahdad Mahdabi ◽

Seyed Pezhman Hosseini Shekarabi

Keyword(s):

Comparative Study ◽

Antioxidant Properties ◽

Protein Hydrolysates

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Phytochemical profiles, phototoxic and antioxidant properties of eleven Hypericum species – A comparative study

Phytochemistry ◽

10.1016/j.phytochem.2018.05.003 ◽

2018 ◽

Vol 152 ◽

pp. 162-173 ◽

Cited By ~ 31

Author(s):

Edoardo Napoli ◽

Laura Siracusa ◽

Giuseppe Ruberto ◽

Alessandra Carrubba ◽

Silvia Lazzara ◽

...

Keyword(s):

Comparative Study ◽

Antioxidant Properties ◽

Phytochemical Profiles ◽

Hypericum Species

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Antioxidant properties, radical scavenging activity and biomolecule protection capacity of flavonoid naringenin and its glycoside naringin: a comparative study

Journal of the Science of Food and Agriculture ◽

10.1002/jsfa.3959 ◽

2010 ◽

Vol 90 (7) ◽

pp. 1238-1244 ◽

Cited By ~ 167

Author(s):

Monica Cavia-Saiz ◽

Maria D Busto ◽

Maria Concepción Pilar-Izquierdo ◽

Natividad Ortega ◽

Manuel Perez-Mateos ◽

...

Keyword(s):

Comparative Study ◽

Radical Scavenging Activity ◽

Antioxidant Properties ◽

Radical Scavenging ◽

Scavenging Activity

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DFT Studies on the Antioxidant Activity of Naringenin and Its Derivatives: Effects of the Substituents at C3

International Journal of Molecular Sciences ◽

10.3390/ijms20061450 ◽

2019 ◽

Vol 20 (6) ◽

pp. 1450 ◽

Cited By ~ 3

Author(s):

Yan-Zhen Zheng ◽

Geng Deng ◽

Rui Guo ◽

Da-Fu Chen ◽

Zhong-Min Fu

Keyword(s):

Antioxidant Activity ◽

Density Functional ◽

Radical Scavenging Activity ◽

Resonance Effect ◽

Antioxidant Properties ◽

Radical Scavenging ◽

Dft Method ◽

Functional Theory ◽

The Density Functional Theory ◽

Selection Of

The radical scavenging activity of a flavonoid is largely influenced by its structure. The effects of the substituents at C3 position on the antioxidant activity of naringenin were carried out using the density functional theory (DFT) method. The reaction enthalpies related with the three well-established mechanisms were analyzed. Excellent correlations were found between the reaction enthalpies and Hammett sigma constants. Equations obtained from the linear regression can be helpful in the selection of suitable candidates for the synthesis of novel naringenin derivatives with enhanced antioxidant properties. In the gas and benzene phases, the antioxidant activity of naringenin was enhanced by the electron-donating substituents via weakening the bond dissociation enthalpy (BDE). In the water phase, it was strengthened by electron-withdrawing groups—via lowering the proton affinity (PA). The electronic effect of the substituent on the BDE of naringenin is mainly governed by the resonance effect, while that on the ionization potential (IP) and PA of naringenin is mainly controlled by the field/inductive effect.

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