Priyabrata Thatoi

Bio: Priyabrata Thatoi is an academic researcher from National Institute of Technology, Rourkela. The author has contributed to research in topics: Heritiera fomes. The author has an hindex of 2, co-authored 2 publications receiving 102 citations.

Photo-mediated green synthesis of silver and zinc oxide nanoparticles using aqueous extracts of two mangrove plant species, Heritiera fomes and Sonneratia apetala and investigation of their biomedical applications.

Abstract: Green synthesis by using biological agents has been a simple and effective approach for the synthesis of various forms of nanoparticles. The present investigation was intended to synthesis Ag-NPs and ZnO-NPs under photo-condition using the aqueous extracts of two mangrove plants namely Heritiera fomes and Sonneratia apetala and evaluate their potential biomedical applications. The formation of nanoparticles in aqueous solution of H. fomes and S. apetala under exposure to sun light was validated by change in color and formation of monodispersed NPs with a narrow particle size distribution. Fourier transform infrared spectroscopy (FT-IR) reveals the presence of Oxime and other heterocyclic compounds to be the most probable compounds responsible for the reduction and stability of nanoparticles in the solutions. The synthesized NPs displayed moderate free radical scavenging properties. The anti-inflammatory potential of ZnO-NPs was recorded to be comparatively higher than that of Ag-NP with 79% and 69.1% respectively. The Ag-NPs with unique properties of inhibiting α-amylase (91.14% and 89.16%) were found to be significantly high indicating its antidiabetic property. The synthesized NPs showed varied zone of inhibition (9-16mm) against the tested microbial pathogens. The synthesized nanoparticles possess strong biological activities in terms of antioxidant, anti-inflammatory, antidiabetic and antibacterial, potentials which could be utilized in various biological applications by the cosmetic, food and biomedical industries.

Mangroves, a potential source for green nanoparticle synthesis: a review

Abstract: Mangroves are one of the diverged ecosystems and are a rich source of medicinal and other valuable plant secondary products. Although a number of plants and micro-organisms have been used for the development of nanoparticles and different types of nanoparticles have already been synthesized from them, very few species of mangrove plants are being reported to have such uses. Some of the mangroves that are reported to have been used for synthesis of nanoparticles are Ceriops tagal, Rhizophora mucronata, R. apiculata, Avicenna marina and Padina gymnospora. Keeping the above factors into consideration, the present review aims at different aspects of the possible exploitation of mangrove plants for synthesis of different types of nanoparticles using various methods and mechanisms.

The Advancing of Zinc Oxide Nanoparticles for Biomedical Applications

Abstract: Zinc oxide nanoparticles (ZnO NPs) are used in an increasing number of industrial products such as rubber, paint, coating, and cosmetics In the past two decades, ZnO NPs have become one of the most popular metal oxide nanoparticles in biological applications due to their excellent biocompatibility, economic, and low toxicity ZnO NPs have emerged a promising potential in biomedicine, especially in the fields of anticancer and antibacterial fields, which are involved with their potent ability to trigger excess reactive oxygen species (ROS) production, release zinc ions, and induce cell apoptosis In addition, zinc is well known to keep the structural integrity of insulin So, ZnO NPs also have been effectively developed for antidiabetic treatment Moreover, ZnO NPs show excellent luminescent properties and have turned them into one of the main candidates for bioimaging Here, we summarize the synthesis and recent advances of ZnO NPs in the biomedical fields, which will be helpful for facilitating their future research progress and focusing on biomedical fields

Antibacterial properties and toxicity from metallic nanomaterials.

Abstract: The era of antibiotic resistance is a cause of increasing concern as bacteria continue to develop adaptive countermeasures against current antibiotics at an alarming rate In recent years, studies have reported nanoparticles as a promising alternative to antibacterial reagents because of their exhibited antibacterial activity in several biomedical applications, including drug and gene delivery, tissue engineering, and imaging Moreover, nanomaterial research has led to reports of a possible relationship between the morphological characteristics of a nanomaterial and the magnitude of its delivered toxicity However, conventional synthesis of nanoparticles requires harsh chemicals and costly energy consumption Additionally, the exact relationship between toxicity and morphology of nanomaterials has not been well established Here, we review the recent advancements in synthesis techniques for silver, gold, copper, titanium, zinc oxide, and magnesium oxide nanomaterials and composites, with a focus on the toxicity exhibited by nanomaterials of multidimensions This article highlights the benefits of selecting each material or metal-based composite for certain applications while also addressing possible setbacks and the toxic effects of the nanomaterials on the environment

A review on biogenic synthesis of ZnO nanoparticles using plant extracts and microbes: A prospect towards green chemistry.

Abstract: Nanotechnology is emerging as an important area of research with its tremendous applications in all fields of science, engineering, medicine, pharmacy, etc. It involves the materials and their applications having one dimension in the range of 1-100nm. Generally, various techniques are used for syntheses of nanoparticles (NPs) viz. laser ablation, chemical reduction, milling, sputtering, etc. These conventional techniques e.g. chemical reduction method, in which various hazardous chemicals are used for the synthesis of NPs later become liable for innumerable health risks due to their toxicity and endangering serious concerns for environment, while other approaches are expensive, need high energy for the synthesis of NPs. However, biogenic synthesis method to produce NPs is eco-friendly and free of chemical contaminants for biological applications where purity is of concerns. In biological method, different biological entities such as extract, enzymes or proteins of a natural product are used to reduce and stabilised formation of NPs. The nature of these biological entities also influence the structure, shape, size and morphology of synthesized NPs. In this review, biogenic synthesis of zinc oxide (ZnO) NPs, procedures of syntheses, mechanism of formation and their various applications have been discussed. Various entities such as proteins, enzymes, phytochemicals, etc. available in the natural reductants are responsible for synthesis of ZnO NPs.

Green synthesis of iron oxide nanoparticles using pomegranate seeds extract and photocatalytic activity evaluation for the degradation of textile dye

Abstract: Iron oxide nanoparticles (Fe2O3 NPs) were fabricated through green route using pomegranate (Punica granatum) seeds extract. The Fe2O3 NPs were characterized by UV–vis, XRD, EDX, SEM and AFM techniques. The adopted green rout furnished semi spherical Fe2O3 NPs, uniformly distributed and particle size in the range of 25–55 nm. The LCMS/MS was performed for the identification of biomolecule present in the extract of pomegranate seeds and p-hydroxy benzoic acid, gallic acid, methyl gallate, catechin, kaempferol-3-O-sophoroside, 3-deoxyflavonoids, magnolol, ferulic acid, vanillic acid and pinocembrin along with other minor constituents were detected in the extracts using for Fe2O3 NPs. The synthesized Fe2O3 NPs showed excellent photocatalytic activity against reactive blue under UV light irradiation and maximum degradation of 95.08% was achieved with 56 min of reaction time. In view of promising activity, the Fe2O3 NPs could be used photocatalyst for the degradation of dyes in wastewater and pomegranate seeds extract can be applied as eco-benign and cost effective approach for Fe2O3 NPs synthesis.