The green method for metal nanoparticles has been gaining more interest owing to its low cost and safe nature. The Carissa edulis (C. edulis) dried fruit extract was utilized for the synthesis silver oxide nanoparticles (Ag2O NPs). The microwave extraction process was optimized using Box-Behnken Design (BBD). The good optimization was found to be 400 W, 70 °C and 30 mL of solvent. We have observed 0.17 g of extract yield from this method. The green synthesized Ag2O NPs were analyzed by various analytical techniques. The absorption peak around 420 nm confirms the formation of Ag2O NPs. Further, the SEM and TEM results showed cube and ellipsoid shape with 1.5–2 nm. The Photocatalytic of Ag2O NPs showed 95.8{\%} of degradation of Congo red with rate constant of 0.0233 min−1 and the antibacterial activity of Ag2O NPs was showed high zone of inhibition (10 mm) against E. coli. Therefore, C. edulis extract mediated Ag2O NPs can be used to carry further research in environmental science and biotechnology.

Madhumitha G

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Fowsiya J

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

Journal of Cluster Science

The natural products or bioorganic phase from food sources as pure compounds provides many applications in the food industry and pharmaceutical industry. The fruits and vegetables are the main sources for many bioorganic phases such as phenolic compounds, flavonoids, alkaloids etc., The focus of this book chapter is on the extraction and preliminary detection of active ingredients in food sources. The common problems and key challenges in the extraction process of food sources is discussed. As extraction methods play an important role in isolation of bioorganic phase, the different extraction process for each bioorganic phase is discussed.

Bioorganic Phase in Natural Food: An Overview

Extraction of Bio Organics Phase from Various Food Sources

Fulltext

Resource-Efficient Technologies

Synthesis of zinc oxide nanoparticles using plant leaf extract against urinary tract infection pathogen

Palladium nanoparticles (Pd NPs) are the very good catalytic agents in many coupling reactions, also these are very well biological agents against bacteria and fungus. M. oleifera capped Pd NPs were synthesized from microwave assisted methanolic extract of M. oleifera peel. To optimize the extraction process RSM (Response Surface Methodology) was applied. To get a good extraction yield BBD (Box-Behnken Design) was employed. The better optimized conditions for the extraction was found as 400 W, 25 mL of CH3OH at 65 °C for 2 min. We observed 61.66 mg of extract yield from this method. Eco-friendly M. oleifera capped Pd NPs were synthesized using M. oleifera peel extract and confirmed using the different characterization techniques like UV- Vis spectroscopy, XRD, SEM and HR-TEM analysis. We found the size of the M. oleifera capped Pd NPs nanoparticles as 27 ± 2 nm and shape of the particles as spherical through the TEM analysis. M. oleifera capped Pd NPs exhibits good antibacterial activity against S. aureus (Staphylococcus aureus) and E. coli (Escherichia coli) bacterial strains and we found the zone inhibition as 0.6 and 0.7 mm. The synthesized M. oleifera capped Pd NPs are screened for hemolytic activity and it proved the M. oleifera capped Pd NPs are non-toxic on RBCs cells. © 2016 Elsevier B.V.

Journal of Photochemistry and Photobiology B: Biology

RSM optimized Moringa oleifera peel extract for green synthesis of M. oleifera capped palladium nanoparticles with antibacterial and hemolytic property

The use of plant extract to synthesize nanoparticle has been considered as one of the eco-friendly method. Additionally, it is a strong alternate for conventional methods which includes chemical and physical approach. In this study, microwave assisted extraction of Carissa edulis (C. edulis) at 70 °C and 400 W was used to extract the secondary metabolites. Further, the metabolites were used as capping agent and Zn (NO3)2 as the metal precursor to synthesize ZnO nanoparticles (ZnO NPs). UV–Vis spectroscopy, FT-IR, XRD, SEM and HR-TEM were used for the characterization of nanoparticles. The Surface Plasmon Resonance around 358 nm from the UV–Vis spectroscopy result represents the ZnO NPs formation. The FT-IR confirms the presence of functional groups that acts as the capping agent for the synthesis of ZnO NPs. The crystalline structure of nanoparticles is revealed in the XRD result, morphology showed by SEM results and the size of the ZnO NPs were predicted by HR-TEM. We have carried out the photocatalytic degradation of Congo red at 365 nm in photo reactor using ZnO NPs. The result from the photocatalytic degradation Congo red showed rate constant is (− k) 0.4947 with 97{\%} of degradation. This is our first attempt on the C. edulis extract on ZnO NPs preparation and Congo red dye degradation revels that ZnO NPs exhibit good photocatalytic property.

Photocatalytic degradation of Congo red using Carissa edulis extract capped zinc oxide nanoparticles

Plants extract from Ocimum tenuiflorum, Solanum tricobatum, Syzygium cumini, Centella asiatica and Citrus sinensis was used for the synthesis of silver nanoparticles (Ag NPs) from silver nitrate solution. Ag NPs were characterized by UV-vis spectrophotometer, X-ray diffractometer (XRD), atomic force microscope (AFM) and scanning electron microscope (SEM). The formation and stability of the reduced silver nanoparticles in the colloidal solution were monitored by UV-vis spectrophotometer analysis. The mean particle diameter of silver nanoparticles was calculated from the XRD pattern according to the line width of the plane, refraction peak using the Scherrer's equation. AFM showed the formation of silver nanoparticle with an average size of 28. nm, 26.5. nm, 65. nm, 22.3. nm and 28.4. nm corresponding to O. tenuiflorum, S. cumini, C. sinensis, S. tricobatum and C. asiatica, respectively. SEM determination of the brown color stable samples showed the formation of silver nanoparticles and well dispersed nanoparticles could be seen in the samples treated with silver nitrate. Antimicrobial activity of the silver bio-nanoparticles was performed by well diffusion method against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Klebsiella pneumoniae. The highest antimicrobial activity of silver nanoparticles synthesized by S. tricobatum, O. tenuiflorum extracts was found against S. aureus (30. mm) and E. coli (30. mm) respectively. The Ag NPs synthesized in this process has the efficient antimicrobial activity against pathogenic bacteria. Of these, silver nanoparticles are playing a major role in the field of nanotechnology and nanomedicine. © 2012.

Journal of Saudi Chemical Society

Synthesis of silver nanoparticles using plants extract and analysis of their antimicrobial property

Biomolecules Derived from Carissa edulis for the Microwave Assisted Synthesis of Ag2O Nanoparticles: A Study Against S. incertulas, C. medinalis and S. mauritia

Journal	Data powered by TypesetJournal of Cluster Science
Publisher	Data powered by TypesetSpringer Science and Business Media LLC
ISSN	1040-7278
Open Access	0