Bioactivity of Green Synthesised Silver Nanoparticles

Table of Contents

1. INTRODUCTION

2. METHANOL EXTRACT AND SILVER NANOPARTICLES

3. ACETONE EXTRACT AND SILVER NANOPARTICLES

4. WATER EXTRACT AND SILVER NANOPARTICLES

5. LITERATURE CITED

Research Objectives & Core Topics

The primary research objective of this work is to investigate a green synthesis methodology for producing silver nanoparticles (AgNPs) using the bark extract of the medicinal plant Acacia auriculiformis, followed by a comprehensive comparative evaluation of their antimicrobial and antioxidant potential against crude plant extracts.

• Green synthesis of silver nanoparticles from A. auriculiformis bark.
• Physicochemical characterization using UV-Vis, FTIR, PL, and XRD spectroscopy.
• Comparative antimicrobial assays against Gram-positive and Gram-negative bacteria.
• Evaluation of antioxidant capacity through various biochemical assays (DPPH, Hydrogen Peroxide scavenging, etc.).

Excerpt from the Book

Summary of Chapters

1. INTRODUCTION: Provides an overview of nanoparticle synthesis methods, emphasizing green synthesis using plant extracts, and introduces the medicinal properties of Acacia auriculiformis.

2. METHANOL EXTRACT AND SILVER NANOPARTICLES: Details the synthesis and characterization of silver nanoparticles using methanol extracts of A. auriculiformis and analyzes their antimicrobial and antioxidant effectiveness.

3. ACETONE EXTRACT AND SILVER NANOPARTICLES: Examines the experimental results of using acetone-based bark extracts to synthesize silver nanoparticles and compares their bioactivity to the crude extract.

4. WATER EXTRACT AND SILVER NANOPARTICLES: Focuses on the green synthesis of nanoparticles using water-based extraction and evaluates their specific performance in antimicrobial and antioxidant assays.

5. LITERATURE CITED: A comprehensive collection of academic references and research studies utilized throughout the thesis.

Keywords

Silver nanoparticles, AgNPs, green synthesis, Acacia auriculiformis, antimicrobial activity, antioxidant capacity, plant extract, methanol extract, acetone extract, water extract, biosynthesis, UV-Visible spectroscopy, FTIR, nanotechnology.

Frequently Asked Questions

What is the core focus of this research?

The research focuses on the green synthesis of silver nanoparticles (AgNPs) using bark extracts of the plant Acacia auriculiformis as a natural and eco-friendly reducing agent.

What are the primary fields explored in this study?

The study covers nanotechnology, phytochemistry, and microbiology, specifically focusing on the bioactivity of synthesized nanoparticles and their potential therapeutic applications.

What is the main objective of this thesis?

The objective is to synthesize AgNPs using three different solvents (methanol, acetone, water), characterize them using spectroscopic techniques, and compare their antimicrobial and antioxidant potential against the crude extracts.

Which scientific methods are employed for synthesis and analysis?

The study uses maceration extraction, green synthesis through chemical reduction, and characterization via UV-Vis, FTIR, and Photoluminescence spectroscopy. Biological activity is assessed using agar well diffusion and antioxidant biochemical assays.

What content is covered in the main chapters?

The main chapters detail the experimental protocols and results for each solvent-specific extract, including the physical characterization of the produced AgNPs and their measured bio-efficacy.

Which keywords best characterize this work?

Key terms include green synthesis, AgNPs, Acacia auriculiformis, antimicrobial activity, antioxidant capacity, and biosynthesized nanoparticles.

How does the polarity of the solvent affect the antioxidant potential?

The results suggest that solvent polarity plays a critical role, as higher polarity often correlates with the extraction efficiency of polyphenols and flavonoids, which contribute significantly to the antioxidant scavenging potential of the synthesized AgNPs.

What specific role does A. auriculiformis bark play in this synthesis?

The bark serves as a rich source of polyphenols and tannins, acting as both a reducing and a capping agent in the green synthesis process, which facilitates the stable formation of silver nanoparticles.