scholarly journals Biomimetic Synthesis of Nanoparticles: Science, Technology & Applicability

10.5772/8776 ◽  
2010 ◽  
Author(s):  
Prathna T.C. ◽  
Lazar Mathew ◽  
N. Chandrasekaran ◽  
Ashok M. ◽  
Amitava Mukherjee
Keyword(s):  
Biomimetic Synthesis ◽  
Synthesis Of Nanoparticles ◽  
Science Technology

scholarly journals BIOMIMETIC SYNTHESIS AND ANTIBACTERIAL PROPERTIES OF STRONTIUM OXIDE NANOPARTICLES USING OCIMUM SANCTUM LEAF EXTRACT

2018 ◽  
Vol 11 (3) ◽  
pp. 384 ◽  
Author(s):  
Apsana G ◽  
George Pp ◽  
Devanna N ◽  
Yuvasravana R
Keyword(s):  
Leaf Extract ◽  
Antibacterial Properties ◽  
Biomimetic Synthesis ◽  
Ocimum Sanctum ◽  
Klebsiella Pneumonia ◽  
Oxide Nanoparticles ◽  
Strontium Nitrate ◽  
Strontium Oxide ◽  
Synthesis Of Nanoparticles ◽  
Vis Spectroscopy

 Objective: The investigation and synthesis of nanoparticles using green chemical methods is an emerging field due to ecologically derived materials. In the present study, the reaction under microwave irradiation technique is proposed for synthesizing the strontium oxide nanoparticles (SrO NPs) by reacting the strontium nitrate powder with Ocimum sanctum L. leaf extract followed by heat treatment at 500oC for 2 h.Methods: The crystalline nature, size, and morphological structure of the SrO powder sample were characterized by techniques such as powder X-ray diffraction (PXRD), scanning electron microscopy, ultraviolet (UV)-Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR) and photoluminescence (PL) spectral analysis. To investigate the antibacterial properties of SrO NPs, pathogens such as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Proteus vulgaris, Klebsiella pneumonia, and Morganella morganii was tested in Mueller–Hinton disc diffusion method.Results: The particle size of the SrO NPs is calculated to be 42 nm using Debye–Scherrer equation. The SrO NPs exhibited absorption peak in the range of 250–350 nm centered at 274 nm in UV region. In addition, it is demonstrated that band gap energy was calculated to be 5.39 eV from Tauc’s plot. The SrO NPs has shown the efficient antibacterial effect by inhibiting zone against Gram-negative bacteria.Conclusion: The main aim of the study is to synthesize cost-effective and eco-friendly green synthesis of SrO NPs from the OS (O. sanctum) leaf extract and their characterization. The mechanism for the formation of SrO NPs in the presence of eugenol as reducing agent is also discussed. The present green chemical approach using plant-based materials for the synthesis of nanoparticles enhances the eco-friendliness, compatibility, effectiveness, and reduces the toxicity.

Biomimetic Synthesis of Nanoparticles

2006 ◽  
Author(s):  
Joseph M. Slocik ◽  
Marc R. Knecht ◽  
David W. Wright
Keyword(s):  
Biomimetic Synthesis ◽  
Synthesis Of Nanoparticles

scholarly journals Biomimetic Synthesis of Silver Nanoparticles Using Endosymbiotic Bacterium InhabitingEuphorbia hirtaL. and Their Bactericidal Potential

Scientifica ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Baker Syed ◽  
Hoovinakola Chinnappa Yashavantha Rao ◽  
Mysore Nagalingaswamy Nagendra-Prasad ◽  
Ashwini Prasad ◽  
Ballagere Puttaraju Harini ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Pathogenic Bacteria ◽  
Morphological Characteristics ◽  
Endophytic Bacterium ◽  
Biomimetic Synthesis ◽  
Metallic Silver ◽  
Face Centered Cubic ◽  
Euphorbia Hirta ◽  
Synthesis Of Nanoparticles ◽  
Face Centered

The present investigation aims to evaluate biomimetic synthesis of silver nanoparticles using endophytic bacterium EH 419 inhabitingEuphorbia hirtaL. The synthesized nanoparticles were initially confirmed with change in color from the reaction mixture to brown indicating the synthesis of nanoparticles. Further confirmation was achieved with the characteristic absorption peak at 440 nm using UV-Visible spectroscopy. The synthesized silver nanoparticles were subjected to biophysical characterization using hyphenated techniques. The possible role of biomolecules in mediating the synthesis was depicted with FTIR analysis. Further crystalline nature of synthesized nanoparticles was confirmed using X-ray diffraction (XRD) with prominent diffraction peaks at 2θwhich can be indexed to the (111), (200), (220), and (311) reflections of face centered cubic structure (fcc) of metallic silver. Transmission electron microscopy (TEM) revealed morphological characteristics of synthesized silver nanoparticles to be polydisperse in nature with size ranging from 10 to 60 nm and different morphological characteristics such as spherical, oval, hexagonal, and cubic shapes. Further silver nanoparticles exhibited bactericidal activity against panel of significant pathogenic bacteria among whichPseudomonas aeruginosawas most sensitive compared to other pathogens. To the best of our knowledge, present study forms first report of bacterial endophyte inhabitingEuphorbia hirtaL. in mediating synthesizing silver nanoparticles.

Biomimetic Synthesis of Nanoparticles Using Aqueous Extracts of Plants (Botanical Species)

2015 ◽  
Vol 31 ◽  
pp. 138-202 ◽  
Author(s):  
Tasneem Abbasi ◽  
J. Anuradha ◽  
Sami Ullah Ganaie ◽  
Shahid Abbas Abbasi
Keyword(s):  
Nanoparticle Synthesis ◽  
Biomimetic Synthesis ◽  
Aqueous Extracts ◽  
Capping Agents ◽  
Synthesis Of Nanoparticles ◽  
Botanical Species ◽  
History Of ◽  
Work Done

The history of plant-based nanoparticle synthesis is traced briefly. All the work done in this field till the present date is then summarized. The extent of the understanding of the role of pH, temperature, reducing/capping agents, metal–plant stoichiometry, stirring, light, etc., in controlling the shapes and sizes of nanoparticles is discussed.

Science, Technology and Society

1998 ◽  
Author(s):  
Martin Bridgstock ◽  
David Burch ◽  
John Forge ◽  
John Laurent ◽  
Ian Lowe
Keyword(s):  
Technology And Society ◽  
Science Technology

Work Engagement and Research Output Among Female and Male Scientists

2016 ◽  
Vol 15 (2) ◽  
pp. 55-65 ◽  
Author(s):  
Lonneke Dubbelt ◽  
Sonja Rispens ◽  
Evangelia Demerouti
Keyword(s):  
Work Engagement ◽  
Research Output ◽  
Research Performance ◽  
Daily Work ◽  
Time Control ◽  
Science Technology ◽  
And Performance ◽  
And Mathematics ◽  
Number Of Publications ◽  
The Relationship

Abstract. Women have a minority position within science, technology, engineering, and mathematics and, consequently, are likely to face more adversities at work. This diary study takes a look at a facilitating factor for women’s research performance within academia: daily work engagement. We examined the moderating effect of gender on the relationship between two behaviors (i.e., daily networking and time control) and daily work engagement, as well as its effect on the relationship between daily work engagement and performance measures (i.e., number of publications). Results suggest that daily networking and time control cultivate men’s work engagement, but daily work engagement is beneficial for the number of publications of women. The findings highlight the importance of work engagement in facilitating the performance of women in minority positions.

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