Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Radical Autoxidation

Radical Autoxidation

The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...

Antiprotozoal Agents

Antiprotozoal Agents

Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...

Defenses Against Pathogens and Herbivores

Defenses Against Pathogens and Herbivores

Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.

Oxidation of Phenols to Quinones

Oxidation of Phenols to Quinones

In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...

Vitamins

Vitamins

Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced in our...

Antidotes

Antidotes

Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Application of Proteomics in Pancreatic Ductal Adenocarcinoma Biomarker Investigations: A Review.

International journal of molecular sciences·2022

Same author

Solid-liquid extraction of bioactive compounds with antioxidant potential from Alternanthera sesillis (red) and identification of the polyphenols using UHPLC-QqQ-MS/MS.

Food research international (Ottawa, Ont.)·2019

Same author

Conjugated Oligo-Aromatic Compounds Bearing a 3,4,5-Trimethoxy Moiety: Investigation of Their Antioxidant Activity Correlated with a DFT Study.

Molecules (Basel, Switzerland)·2016

Same author

Correlation of antioxidant activities with theoretical studies for new hydrazone compounds bearing a 3,4,5-trimethoxy benzyl moiety.

European journal of medicinal chemistry·2015

Same author

Effects of Tamarindus indica fruit pulp extract on abundance of HepG2 cell lysate proteins and their possible consequential impact on metabolism and inflammation.

BioMed research international·2014

Same author

Polyphenols in Barringtonia racemosa and their protection against oxidation of LDL, serum and haemoglobin.

Food chemistry·2013

Search research articles

Related Experiment Video

Updated: Jun 13, 2026

Evaluation of Antioxidant and Anthelmintic Properties of Tithonia diversifolia Extracts Against Gastrointestinal Nematode Eggs Using In Vitro Assays

Evaluation of Antioxidant and Anthelmintic Properties of Tithonia diversifolia Extracts Against Gastrointestinal Nematode Eggs Using In Vitro Assays

Published on: August 1, 2025

Antioxidants from tropical herbs.

Rasyidah Razab¹, Azlina Abdul-Aziz

¹Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.

Natural Product Communications

|April 28, 2010

Summary

Malaysian herbs rich in polyphenols show significant antioxidant potential. Key species like Anacardium occidentale and Barringtonia racemosa demonstrate high antioxidant capacity, suggesting polyphenols are the primary contributors.

Area of Science:

Phytochemistry
Nutraceuticals
Food Science

Background:

Polyphenolic compounds in plants are recognized for their antioxidant properties.
There is a continuous search for novel natural antioxidant sources.
Limited data exists on the antioxidant capacity of tropical herbs.

Purpose of the Study:

To analyze the polyphenolic content and antioxidant activities of 19 commonly consumed Malaysian herbs.
To identify potential new sources of natural antioxidants from tropical flora.
To investigate the correlation between polyphenolic content and antioxidant activity.

Main Methods:

Analysis of polyphenolic content using gallic acid equivalents.
Measurement of antioxidant activities using Ferric Reducing Antioxidant Power (FRAP) and Trolox Equivalent Antioxidant Capacity (TEAC) assays.

More Related Videos

Microwave-Assisted Extraction of Phenolic Compounds and Antioxidants for Cosmetic Applications Using Polyol-Based Technology

Microwave-Assisted Extraction of Phenolic Compounds and Antioxidants for Cosmetic Applications Using Polyol-Based Technology

Published on: August 23, 2024

Related Experiment Videos

Last Updated: Jun 13, 2026

Evaluation of Antioxidant and Anthelmintic Properties of Tithonia diversifolia Extracts Against Gastrointestinal Nematode Eggs Using In Vitro Assays

Evaluation of Antioxidant and Anthelmintic Properties of Tithonia diversifolia Extracts Against Gastrointestinal Nematode Eggs Using In Vitro Assays

Published on: August 1, 2025

Microwave-Assisted Extraction of Phenolic Compounds and Antioxidants for Cosmetic Applications Using Polyol-Based Technology

Microwave-Assisted Extraction of Phenolic Compounds and Antioxidants for Cosmetic Applications Using Polyol-Based Technology

Published on: August 23, 2024

Statistical correlation analysis between antioxidant assays and polyphenol content.

Main Results:

Nineteen Malaysian herbs were evaluated for their antioxidant properties.
Shoots of Anacardium occidentale, shoots and fruits of Barringtonia racemosa, Pithecellobium jiringa, and Parkia speciosa exhibited high polyphenolic content (>150 µg GAE/mg).
These selected herbs also demonstrated significant antioxidant activities (FRAP >1.2 mM, TEAC >2.4 mM), with strong correlations between assays and polyphenol levels.

Conclusions:

The study identified several Malaysian herbs with substantial antioxidant potential.
Polyphenolic compounds are the primary drivers of the observed antioxidant activities in these herbs.
Findings support the use of these herbs as natural sources of antioxidants.