A novel approach to fingerprint visualization on paper using nanotechnology: reversing the appearance by tailoring the gold nanoparticles' capping ligands

2013 ◽  
Vol 49 (35) ◽  
pp. 3688 ◽  
Author(s):  
Sanaa Shenawi ◽  
Nimer Jaber ◽  
Joseph Almog ◽  
Daniel Mandler
Keyword(s):  
Gold Nanoparticles ◽  
Novel Approach ◽  
Capping Ligands

scholarly journals Cyanobacteria as Nanogold Factories II: Chemical Reactivity and anti-Myocardial Infraction Properties of Customized Gold Nanoparticles Biosynthesized by Cyanothece sp.

Marine Drugs ◽  
2019 ◽  
Vol 17 (7) ◽  
pp. 402 ◽  
Author(s):  
Nancy S. Younis ◽  
Esam M. Bakir ◽  
Maged E. Mohamed ◽  
Nermin A. El Semary
Keyword(s):  
Myocardial Infarction ◽  
Gold Nanoparticles ◽  
Chemical Reactivity ◽  
Characteristic Absorption Band ◽  
Novel Approach ◽  
Myocardial Infraction ◽  
Metal State ◽  
Chemical Conditions ◽  
Physiological And Biochemical ◽  
Successful Production

Cyanothece sp., a coccoid, unicellular, nitrogen-fixing and hydrogen-producing cyanobacterium, has been used in this study to biosynthesize customized gold nanoparticles under certain chemical conditions. The produced gold nanoparticles had a characteristic absorption band at 525–535 nm. Two types of gold nanoparticle, the purple and blue, were formed according to the chemical environment in which the cyanobacterium was grown. Dynamic light scattering was implemented to estimate the size of the purple and blue nanoparticles, which ranged from 80 ± 30 nm and 129 ± 40 nm in diameter, respectively. The highest scattering of laser light was recorded for the blue gold nanoparticles, which was possibly due to their larger size and higher concentration. The appearance of anodic and cathodic peaks in cyclic voltammetric scans of the blue gold nanoparticles reflected the oxidation into gold oxide, followed by the subsequent reduction into the nano metal state. The two produced forms of gold nanoparticles were used to treat isoproterenol-induced myocardial infarction in experimental rats. Both forms of nanoparticles ameliorated myocardial infarction injury, with a slight difference in their curative activity with the purple being more effective. Mechanisms that might explain the curative effect of these nanoparticles on the myocardial infarction were proposed. The morphological, physiological, and biochemical attributes of the Cyanothece sp. cyanobacterium were fundamental for the successful production of “tailored” nanoparticles, and complemented the chemical conditions for the differential biosynthesis process. The present research represents a novel approach to manipulate cyanobacterial cells towards the production of different-sized gold nanoparticles whose curative impacts vary accordingly. This is the first report on that type of manipulated gold nanoparticles biosynthesis which will hopefully open doors for further investigations and biotechnological applications.

A novel approach to imaging engorged ticks: Micro-CT scanning of Ixodes ricinus fed on blood enriched with gold nanoparticles

2021 ◽  
Vol 12 (1) ◽  
pp. 101559
Author(s):  
Jaroslav Ondruš ◽  
František Hubatka ◽  
Pavel Kulich ◽  
Nikola Odehnalová ◽  
Vratislav Harabiš ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ixodes Ricinus ◽  
Ct Scanning ◽  
Micro Ct ◽  
Novel Approach

scholarly journals Modulatory Effect of Citrate Reduced Gold and Biosynthesized Silver Nanoparticles on α-Amylase Activity

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Kantrao Saware ◽  
Ravindra Mahadappa Aurade ◽  
P. D. Kamala Jayanthi ◽  
Venkataraman Abbaraju
Keyword(s):  
Gold Nanoparticles ◽  
Silver Nanoparticles ◽  
Amylase Activity ◽  
Temperature Stability ◽  
Fold Increase ◽  
Free Enzyme ◽  
Catalytic Function ◽  
Ficus Benghalensis ◽  
Novel Approach ◽  
Immobilization Of Enzymes

Amylase is one of the important digestive enzymes involved in hydrolysis of starch. In this paper, we describe a novel approach to study the interaction of amylase enzyme with gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs) and checked its catalytic function. AuNPs are synthesized using citrate reduction method and AgNPs were synthesized using biological route employing Ficus benghalensis and Ficus religiosa leaf extract as a reducing and stabilizing agent to reduce silver nitrate to silver atoms. A modulatory effect of nanoparticles on amylase activity was observed. Gold nanoparticles are excellent biocompatible surfaces for the immobilization of enzymes. Immobilized amylase showed 1- to 2-fold increase of activity compared to free enzyme. The biocatalytic activity of amylase in the bioconjugate was marginally enhanced relative to the free enzyme in solution. The bioconjugate material also showed significantly enhanced pH and temperature stability. The results indicate that the present study paves way for the modulator degradation of starch by the enzyme with AuNPs and biogenic AgNPs, which is a promising application in the medical and food industry.

Phytosynthesis, Characterization and Fungicidal Potential of Emerging Gold Nanoparticles Using Pongamia pinnata Leave Extract: A Novel Approach in Nanoparticle Synthesis

2019 ◽  
Vol 31 (1) ◽  
pp. 125-131 ◽  
Author(s):  
Ashapurna Khatua ◽  
Eepsita Priyadarshini ◽  
Paulraj Rajamani ◽  
Amiyakumar Patel ◽  
Jitender Kumar ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Nanoparticle Synthesis ◽  
Pongamia Pinnata ◽  
Novel Approach

Rational and Combinatorial Design of Peptide Capping Ligands for Gold Nanoparticles

2004 ◽  
Vol 126 (32) ◽  
pp. 10076-10084 ◽  
Author(s):  
Raphaël Lévy ◽  
Nguyen T. K. Thanh ◽  
R. Christopher Doty ◽  
Irshad Hussain ◽  
Richard J. Nichols ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Combinatorial Design ◽  
Capping Ligands

A Novel Approach for the Synthesis of Gold Nanoparticles Using Trypsin

2014 ◽  
Vol 20 (5) ◽  
pp. 1061-1065 ◽  
Author(s):  
Salman Khan ◽  
Syed Mohd. Danish Rizvi ◽  
Mohd. Saeed ◽  
Ashwani Kr. Srivastava ◽  
Mohd. Sajid Khan
Keyword(s):  
Gold Nanoparticles ◽  
Novel Approach

Use of protease inhibitory gold nanoparticles as a compatibility enhancer for Bt and deltamethrin: A novel approach for pest control

2016 ◽  
Vol 8 ◽  
pp. 8-12 ◽  
Author(s):  
Chandrakant P. Narkhede ◽  
Rahul K. Suryawanshi ◽  
Chandrashekhar D. Patil ◽  
Hemant P. Borase ◽  
Satish V. Patil
Keyword(s):  
Gold Nanoparticles ◽  
Pest Control ◽  
Novel Approach

ECO-FRIENLY SYNTHESIS OF GOLD NANOPARTICLES AND STUDY THEIR EFFECT WITH ANTIBIOTICS AGAINST ACINETOBACTER BAUMANNII

2020 ◽  
Vol 51 (4) ◽  
pp. 1204-1211
Author(s):  
Al-Shaabani & et al.
Keyword(s):  
Gold Nanoparticles ◽  
Klebsiella Pneumoniae ◽  
Acinetobacter Baumannii ◽  
Multi Drug Resistance ◽  
The Novel ◽  
Metallic Nanoparticle ◽  
Antimicrobial Spectrum ◽  
Novel Approach ◽  
Antibiotic Delivery ◽  
Synergism Effect

This study was aimed to produce AuNPs biologically using Klebsiella pneumoniae and study their synergistic effect with some antibiotics.Technologies of nanoparticles are quick and are employed in many applications in biomedicine. The potential of metallic nanoparticle as an anti-microbial agent is greatly investigated which considered as an alternative method to reduce the challenges of multi-drug resistance microbes. The present study discusses the novel approach to synthesize nanoparticles involving eco-friendly synthesis of gold nanoparticles using Klebsiella pneumoniae and study their effect as antimicrobial spectrum .Also study synergism effect of gold nanoparticles with antibiotic against Acinetobacter baumannii. These approaches are used to enhance antimicrobial efficacy of nanoparticles by modification of surfaces and to investigate activity of antibiotic delivery.

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