Microbial Synthesis of Gold Nanoparticles and their Application.

BACKGROUND: Nanoparticles play a very important role in our daily lives and have a wide range of applications in agriculture and biology, such as antioxidants and antimicrobial compounds. Among them are gold nanoparticles (AuNPs) that are highly complex and are widely used. In recent years gold nanoparticles have attracted much attention because of their optical properties, electronic, physicochemical, and surface Plasmon resonance (SPR). Gold plated nanoparticles, similar to metal nanoparticles, have many unusual chemical and physical properties due to the effects of their quantum size and location compared to other iron or metal atoms. Gold nanoparticles can be used in pharmaceutical products such as antimicrobial and anti-biofilm agents, targeted delivery of anticancer drugs, biosensors, biocatalysis, bioremediation modification of toxic chemicals exposing the soil and atmosphere, dye reduction, etc. Yet such methods are expensive and out of harmony with nature. In that account, the microbes-mediated synthesis of gold nanoparticles recently changed rapidly when pure microbes becoming ac-friendly, non-toxic, and biocompatible as physiological and chemical methods. This document aims to review the progress made in recent years with the fusion of gold nanoparticles. The microbial source includes bacteria, algae fungi. These works motivate people how to apply and synthesize gold nanoparticles. This review also focuses on the process of classification of gold nanoparticles, structures, and their use in the development of various requirements. OBJECTIVE: The main goal is to study gold nanoparticles and their application in the future. METHODS: We studied different research papers, reviewed papers from "Google Scholar", "NCBI", "PubMed", "Science Direct" made. CONCLUSION: Metal nanoparticles are suitable for many emerging technologies. Understanding the microorganisms found in nature because the fusion of gold nanoparticles is required.

Nanoparticles as an effective drug delivery system in COVID-19.

BACKGROUND: The global healthcare sector has been dealing with a situation known as a novel severe acute respiratory syndrome (SARS-CoV-2) since the end of 2019. Covid-19 is an acronym for Covid-19 (Coronavirus Disease- 2019). It causes a respiratory infection that includes cold, sneezing and coughing, and pneumonia. In the case of an animal, it causes diarrhea and upper respiratory diseases. Covid-19 transmitted human to human via airborne droplets. First Covid-19 emerged in Wuhan market China and it spread rapidly throughout the World. As we know nanoparticles are a novel drug delivery system. They have various advantageous effects like increasing the efficacy of the drug, safety, etc. In this review, we study about the nanoparticles and summarize how it is effective during drug delivery system in Covid-19. Chitosan is a much focused biopolymeric nanoparticle. It delivers drugs to the specific target site. In a recent health crisis, chitosan nanoparticles are one of the ways to release drugs of Covid-19, and specifically in the lungs of the affected patients. We studied and extracted our data from various research papers, review papers, and some other articles. OBJECTIVE: The main goal is to study the nanoparticles and their future aspects which is an effective drug delivery system in Covid-19. METHODS: The bibliographic search was done through a systematic search. The terms "Nanoparticles", "Covid-19 ", "Drug delivery" etc. were used to search the databases/search engines like "Google Scholar", "NCBI", "PubMed", "Science Direct" etc. These databases and search engines used here perform the limited criteria of search to conduct a systematic literature survey for the study and report writing. All the text from the articles and research papers were studied and analyzed. The various articles and research papers were used in writing this report and all of which are mentioned in the reference section of this report. CONCLUSION: Our current studies reveal that nanoparticles may prove very helpful in the delivery of drugs for Covid-19 treatment. Many cases showed that patients, where drugs are delivered with the help of nanoparticles, produced very few side effects.