The Nano-Magnetic Dancing of Bacteria Hand-in-Hand with Oxygen

Talib, Ayesha; Khan, Abid Ali; Ahmed, Haroon; Jilani, Ghulam

doi:10.1590/1678-4324-2017160769

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…Examples from microbiology research include reports of screaming yeasts [Roosth, 2009], hungry fungi that attack iron [Hand, 2016], dancing bacteria [Talib et al, 2017] and rock-eating bacteria [Smith, 2018].…”

Section: Anthropomorphism -Origins Merits and Concernsmentioning

confidence: 99%

Spikey blobs with evil grins: understanding portrayals of the coronavirus in South African newspaper cartoons in relation to the public communication of science

Joubert¹,

Wasserman²

2020

JCOM

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This study explores how South African newspaper cartoonists portrayed the novel coronavirus during the initial months of the COVID-19 pandemic. We show how these cartoons respond to the socio-economic and cultural contexts in the country. Our analysis of how cartoonists represent the novel coronavirus explain how they create meaning (and may influence public sentiments) using colour, morphological characteristics and anthropomorphism as visual rhetorical tools. From a total population of 497 COVID-19-related cartoons published in 15 print and online newspapers from 1 January to 31 May 2020, almost a quarter (24%; n=120) included an illustration of the coronavirus. Viruses were typically coloured green or red and attributed with human characteristics (most often evil-looking facial expressions) and with exaggerated, spikey stalks surrounding the virus body. Anthropomorphism was present in more than half of the 120 cartoons where the virus was illustrated (58%; n=70), while fear was the dominant emotional tone of the cartoons. Based on our analysis, we argue that editorial cartoons provide a useful source to help us understand the broader discursive context within which public communication of science operates during a pandemic.

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Section: Anthropomorphism -Origins Merits and Concernsmentioning

confidence: 99%

Spikey blobs with evil grins: understanding portrayals of the coronavirus in South African newspaper cartoons in relation to the public communication of science

Joubert¹,

Wasserman²

2020

JCOM

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“…The isolates were cultured in a simple 9 K medium to isolate magnetotactic bacteria as previously reported 4 , 37 . The microorganisms were incubated at 37 °C on a shaker at 120 RPM.…”

Section: Methodsmentioning

confidence: 99%

Biosynthesis of iron oxide magnetic nanoparticles using clinically isolated Pseudomonas aeruginosa

Khan

et al. 2021

Sci Rep

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Magnetotactic bacteria are microscale complex natural systems that synthesize magnetic nanoparticles through biologically controlled mineralization. Nanoparticles produced by this process are biocompatible due to the presence of surrounding membranes. The mechanism controlling synthesis is cost-effective and is executed by complex genomes (operons). The results are monodispersed magnetic nanoparticles displaying advantages over polydispersed ones synthesized by physical and chemical methods. In this work, we isolated Pseudomonas aeruginosa from clinical samples and demonstrated its ability to biosynthesize magnetic nanoparticles. P. aeruginosa was thrived in a carbon-minimal medium supplemented with iron at low pH. The cells aligned parallel to a magnetic field, confirming their magnetic properties. The magnetic nanoparticles were extracted, purified, and characterized using electron microscopy, magnetometry, dynamic light scattering, and X-ray diffraction. This work represents the first isolation of a magnetotactic bacterium from clinical samples. The aerobic nature of these bacteria allows them to be easily cultured under laboratory conditions, unlike their well-known microaerophilic counterparts. The biosynthesized magnetic nanoparticles can be used in many applications, including magnetic resonance imaging, diagnostics, and therapeutics (i.e., magnetic hyperthermia).

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“…It has been reported that NPs could be synthesized by Fungi like Fusarium oxysporum and Phanerochaete chrysosporium . Magnetotactic bacteria are also well known to biosynthesize magnetic iron oxide nanoparticles [ 79 , 80 ]. Biosynthetically produced AgNPs using fungus, yeast, bacteria, and plant extracts were found to have strong antibacterial efficacy against various MDR pathogens such as M. tuberculosis , P. aeruginosa , S. pneumoniae , MRSA, K. pneumoniae , MRSE, S. pyogenes , Bacillus spp., E. coli and S. typhi [ 1 , 77 , 81 , 82 ].…”

Section: Nanoparticles As a Weapon Against Antibiotically Resistanmentioning

confidence: 99%

Pulling the Brakes on Fast and Furious Multiple Drug-Resistant (MDR) Bacteria

Khan

Manzoor

Sultan

et al. 2021

IJMS

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Life-threatening bacterial infections have been managed by antibiotics for years and have significantly improved the wellbeing and lifetime of humans. However, bacteria have always been one step ahead by inactivating the antimicrobial agent chemically or by producing certain enzymes. The alarming universal occurrence of multidrug-resistant (MDR) bacteria has compelled researchers to find alternative treatments for MDR infections. This is a menace where conventional chemotherapies are no longer promising, but several novel approaches could help. Our current review article discusses the novel approaches that can combat MDR bacteria: starting off with potential nanoparticles (NPs) that efficiently interact with microorganisms causing fatal changes in the morphology and structure of these cells; nanophotothermal therapy using inorganic NPs like AuNPs to destroy pathogenic bacterial cells; bacteriophage therapy against which bacteria develop less resistance; combination drugs that act on dissimilar targets in distinctive pathways; probiotics therapy by the secretion of antibacterial chemicals; blockage of quorum sensing signals stopping bacterial colonization, and vaccination against resistant bacterial strains along with virulence factors. All these techniques show us a promising future in the fight against MDR bacteria, which remains the greatest challenge in public health care.

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The Nano-Magnetic Dancing of Bacteria Hand-in-Hand with Oxygen

Cited by 5 publications

References 18 publications

Spikey blobs with evil grins: understanding portrayals of the coronavirus in South African newspaper cartoons in relation to the public communication of science

Spikey blobs with evil grins: understanding portrayals of the coronavirus in South African newspaper cartoons in relation to the public communication of science

Biosynthesis of iron oxide magnetic nanoparticles using clinically isolated Pseudomonas aeruginosa

Pulling the Brakes on Fast and Furious Multiple Drug-Resistant (MDR) Bacteria

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