Isolation of Quercetin from "Allium cepa" Estimation of Total Phenolic and Flavonoid Content in Common Medicinal Plantas "Ficus benghalensis, Elaeocarpus sphaericus, Ipomea carnea and Azeratum conyzoides" and their Antioxidant Activities

Inhaltsverzeichnis (Table of Contents)

• Chapter 1: Introduction
• 1.1: Background
• 1.2: Literature Review
• 1.3: Statement of the Problem
• 1.4: Objectives of the Study
• 1.5: Significance of the Study
• Chapter 2: Materials and Methods
• 2.1: Collection of Plant Materials
• 2.2: Preparation of Plant Extracts
• 2.3: Isolation of Quercetin from Allium cepa
• 2.4: Quantification of Total Phenolic Content
• 2.5: Quantification of Total Flavonoid Content
• 2.6: Antioxidant Activities of the Extracts
• 2.6.1: DPPH Radical Scavenging Activity
• 2.6.2: Reducing Power Assay
• Chapter 3: Results and Discussion
• 3.1: Isolation and Characterization of Quercetin from Allium cepa
• 3.2: Estimation of Total Phenolic and Flavonoid Content
• 3.3: Antioxidant Activity of the Extracts
• Chapter 4: Conclusion
• References

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This dissertation aims to isolate quercetin from Allium cepa (onion) and to evaluate the total phenolic and flavonoid content, as well as the antioxidant activities of four common medicinal plants: Ficus benghalensis, Elaeocarpus sphaericus, Ipomea carnea, and Azaratum conyzoides.

• Isolation and characterization of quercetin from onion
• Quantification of total phenolic and flavonoid content in medicinal plants
• Evaluation of antioxidant activities of plant extracts
• Determination of the potential of these medicinal plants as sources of natural antioxidants
• Contribution to the understanding of the phytochemical composition and biological properties of these plants

Zusammenfassung der Kapitel (Chapter Summaries)

Chapter 1 provides a comprehensive overview of the research topic, including the background of quercetin and its health benefits, a review of relevant literature, and the specific objectives and significance of the study. Chapter 2 outlines the materials and methods used in the study, including the collection and preparation of plant materials, the isolation of quercetin from onion, the quantification of total phenolic and flavonoid content, and the evaluation of antioxidant activities using various assays. Chapter 3 presents the results and discussion, focusing on the characterization of isolated quercetin, the determination of phenolic and flavonoid content, and the analysis of antioxidant activities. The chapter also provides a detailed interpretation of the results in relation to previous research and the potential applications of the studied plants.

Schlüsselwörter (Keywords)

Quercetin, Allium cepa, Ficus benghalensis, Elaeocarpus sphaericus, Ipomea carnea, Azeratum conyzoides, medicinal plants, phenolic compounds, flavonoids, antioxidant activity, DPPH radical scavenging activity, reducing power assay.