In recent years the utilization of secondary metabolites from plant extract has emerged as a novel technology for the synthesis of various nanoparticles. In this paper we studied the potential of nanocrystalline palladium nanoparticles production using acaricidal, insecticidal and larvicidal efficacy of Annona squamosa L aqueous peel extract as the biomaterial for the first time. The synthesized nanoparticles were characterized and confirmed as palladium nanoparticles by using UV-visible spectroscopy, XRD and TEM analysis. The results clearly showed that the compounds containing OH as a functional group played a critical role in capping the nanoparticles. Also the results highlight the possibility of green pathways to produce palladium nanoparticles. © 2011 Elsevier B.V.

Mohana Roopan S

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Kumar R

Computer Science

School of Computer Science and Engineering

Chennai Campus

Bharathi A

Khanna V.G

Prabhakarn A.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Colloids and Surfaces B: Biointerfaces

Abstract: Nanotechnology is a relatively new field which is making advancements each day. It is making a huge impact on our day-to-day lives. Nanoparticles possess unique properties which makes it viable to use it in a wide variety of fields such as in cosmetics, parasitology and catalysis. We used a plant-mediated, nature-friendly method which does not involve the usage of any harmful chemicals. Syzgium cumini seed extract was taken as the reducing agent for the preparation of zinc oxide nanoparticles. Green-synthesized zinc oxide nanoparticles were confirmed using X-ray diffraction, Fourier-transform infrared, UV–Vis spectroscopy, scanning electron microscope and transmission electron microscope. The average particle size was found to be around 50–60 nm. Additionally, larvicidal and ovicidal activity of the prepared nanoparticles against dengue causing vector was also carried out which resulted in LC50 and LC90 of 51.94 ppm and 119.99 ppm, respectively. Graphical abstract: [Figure not available: see fulltext.]/ © 2018, Islamic Azad University (IAU).

International Journal of Environmental Science and Technology

Environmental friendly synthesis of zinc oxide nanoparticles and estimation of its larvicidal activity against Aedes aegypti

Metal/metal oxide nanoparticles are considered to be the most important of several kinds of nanoparticles, having numerous applications in the biomedical field. There are many ways to synthesize metal/metal oxide nanoparticles, which include natural (Green), chemical and physical methods. But the main drawback to chemical or physical processes is their hazardous approach and elimination of toxic effluents, which cause a threat to the environment. To overcome this drawback, most researchers have been focusing on a biotechnological approach towards the synthesis of metal/metal oxide nanoparticles. In general, metal nanoparticles utilized in applications mingle with air and lead to some airborne diseases while metal oxide nanoparticles are very tiny in comparison. In this chapter, the most prominent research in the field of nanobiotechnology is discussed; moreover, an overview is given of metal/metal oxide nanoparticles and their applications. © 2018 Scrivener Publishing LLC.

Green Metal Nanoparticles

Current Scenario in Green Approaches for Metal/Metal Oxide Nanoparticles Synthesis

Plants are the major sources of different types of phytochemicals with numerous biomedical applications. Nanotechnology is a rapidly growing field and plays an important role in most of the advanced science, medicine, and technology areas. This chapter summarizes the plant sources used for nanoparticle synthesis, characterization, and their applications. Plant parts such as leaves, fruits, seeds, stems, flowers, roots, barks, and fruit peels are involved in the synthesis of various types of nanoparticles. The low cost and higheco-friendly-natured plants are very advanced and beneficial to human applications. Nanoparticles such as silver from silver nitrate, gold from gold chloride, zinc oxide from zinc nitrate and zinc acetate, cadmium sulfide and zinc sulfide from cadmium sulfate and zinc sulfate, etc. were synthesized with the help of different types of plants and their different parts are reported in this chapter. © 2018 Elsevier Inc. All rights reserved.

Nanomaterials in Plants, Algae, and Microorganisms

Plant-Based Synthesis of Nanoparticles and Their Impact

Polymer Gels Gels Horizons: From Science to Smart Materials

Radiation Dosimetry—A Different Perspective of Polymer Gel

Metal nanoparticles have a great impact and even change the composition of soil microbial communities. This poses the risk of their accumulation in the ecosystem, which may call on health hazard. Statistical techniques such as Plackett-Burman design, Response Surface Methodology were used for optimizing medium constituents for Bacillus cereus SVK1 and other critical variables responsible for the production of biomolecules and biosynthesis of hematite nanoparticles. The effect of hematite nanoparticles on the growth of soil bacteria were tested by agar-well diffusion method and dynamic growth curve techniques. Bacterial growth inhibition was not observed with hematite nanoparticle concentration of up to 25mg/mL. In addition, hematite nanoparticles enhanced the growth of the soil bacteria. The results show that hematite nanoparticles were non-toxic to soil bacteria indicating their scope for wide range of applications. The effective cytotoxic concentration (CTC50) of hematite nanoparticles against MCF-7, A549, Hep3B and Vero cell lines was found to be 207.58, 224.69, 193.26 and 2530μg/mL respectively. Hematite nanoparticles didn't cause lysis of red blood cells.

Evaluation of cytotoxicity of hematite nanoparticles in bacteria and human cell lines

Plant products may be alternative sources of parasitic control agents, since they constitute a rich source of bioactive compounds that are eco-friendly and nontoxic products. The plant extracts are good and safe alternatives due to their low toxicity to mammals and easy biodegradability. In the present study, fruit peel aqueous extract of Annona squamosa (Annonaceae) extracted by immersion method exhibited adulticidal activity against Haemaphysalis bispinosa (Acarina: Ixodidae) and the hematophagous fly, Hippobosca maculata (Diptera: Hippoboscidae), and larvicidal activity against the cattle tick Rhipicephalus (Boophilus) microplus (Acari: Ixodidae), Anopheles subpictus, and Culex quinquefasciatus (Diptera: Culicidae). The chemical composition of A. squamosa fruit peel aqueous extract was analyzed by gas chromatography-mass spectrometry. The major chemical constituent of peel aqueous extract of A. squamosa was identified as 1H- cycloprop[e]azulen-7-ol decahydro-1,1,7-trimethyl-4-methylene- [1ar-(1aα,4aα, 7β, 7 a, β, 7bα)] (28.55%) by comparison of mass spectral data and retention times. The other major constituents present in the aqueous extract were retinal 9-cis- (12.61%), 3,17-dioxo-4-androsten-11alpha-yl hydrogen succinate (6.86%), 1-naphthalenepentanol decahydro-5-(hydroxymethyl)-5,8a-dimethyl-y,2- bis(methylene)-(1α,4aβ,5α,8aα) (14.83%), 1-naphthalenemethanol decahydro -5-(5-hydroxy-3-methyl-3-pentenyl)- 1,4a-di methyl - 6-methylene -(1S-[1α, 4aα, 5α(E), 8aβ] (4.44%), (-)-spathulenol (20.75%), podocarp-7-en-3-one13β-methyl-13-vinyl- (5.98%), and 1-phenanthrene carboxaldehyde 7-ethenyl-1,2,3,4,4a,4,5,6,7,9,10,10a- dodecahydro-1,4a,7-trimethyl-[1R-(1α,4aβ.4bα,7β, 10aα)]-(5.98%). The adult and larval parasitic mortalities observed in fruit peel aqueous extract of A. squamosa were 31, 59, 80, 91, and100%; 27, 42, 66, 87, and 100%; and 33, 45, 68, 92, and 100% at the concentrations of 250, 500, 1,000, 1,500, and 2,000 ppm, respectively, against Haemaphysalis bispinosa, Hippobosca maculata, and R. microplus. The observed larvicidal efficacies were 36, 55, 72, 92, 100% and 14, 34, 68, 89, and 100% at 200, 400, 600, 800, and 1,000 ppm, respectively, against A. subpictus and C. quinquefasciatus. The highest parasite mortality was found after 24 h of exposure against Haemaphysalis bispinosa (LC50∈=∈404.51 ppm, r 2∈=∈0.890), Hippobosca maculata (LC50∈= ∈600.75 ppm, r 2∈=∈0.983), the larvae of R. microplus (LC50∈=∈548.28 ppm, r 2∈=∈0.975), fourth-instar larvae of A. subpictus (LC50∈=∈327.27 pm, r 2∈=∈0.970), and C. quinquefasciatus (LC50∈= ∈456.29 ppm, r 2∈=∈0.974), respectively. The control (distilled water) showed nil mortality in the concurrent assay. The χ 2 values were significant at p∈&lt;∈0.05 level. Therefore, the eco-friendly and biodegradable compounds from fruit peel aqueous extract of A. squamosa may be an alternative to conventional synthetic chemicals, particularly in integrated approach for the control of Haemaphysalis bispinosa, Hippobosca maculata, R. microplus, and the medically important vectors A. subpictus and C. quinquefasciatus. © 2011 Springer-Verlag.

Parasitology Research

Acaricidal, insecticidal, and larvicidal efficacy of fruit peel aqueous extract of Annona squamosa and its compounds against blood-feeding parasites

Nano-Micro Letters

Green synthesis and characterization of palladium nanoparticles and its conjugates from solanum trilobatum leaf extract

Journal of Hazardous Materials

Phyto-crystallization of palladium through reduction process using Cinnamom zeylanicum bark extract

Bioelectrochemistry

Palladium nanoparticles modified electrode for the selective detection of catecholamine neurotransmitters in presence of ascorbic acid

Green Chemistry

Green synthesis of silver and palladium nanoparticles at room temperature using coffee and tea extract

Acaricidal, insecticidal, and larvicidal efficacy of aqueous extract of Annona squamosa L peel as biomaterial for the reduction of palladium salts into nanoparticles

Journal	Data powered by TypesetColloids and Surfaces B: Biointerfaces
Publisher	Data powered by TypesetElsevier BV
ISSN	0927-7765
Open Access	0