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https://www.readbyqxmd.com/read/28516205/applications-of-white-rot-fungi-in-bioremediation-with-nanoparticles-and-biosynthesis-of-metallic-nanoparticles
#1
REVIEW
Kai He, Guiqiu Chen, Guangming Zeng, Zhenzhen Huang, Zhi Guo, Tiantian Huang, Min Peng, Jiangbo Shi, Liang Hu
White rot fungi (WRF) are important environmental microorganisms that have been widely applied in many fields. To our knowledge, the application performance of WRF in bioremediation can be greatly improved by the combination with nanotechnology. And the preparation of metallic nanoparticles using WRF is an emerging biosynthesis approach. Understanding the interrelation of WRF and nanoparticles is important to further expand their applications. Thus, this mini-review summarizes the currently related reports mainly from the two different point of views...
May 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28476983/biosynthesis-of-silver-and-gold-nanoparticles-using-trichoderma-atroviride-for-the-biological-control-of-phomopsis-canker-disease-in-tea-plants
#2
Ponnusamy Ponmurugan
The biological way of metallic nanoparticles production using ecofriendly biocontrol agents are largely used to control many plant pathogenic microorganisms in agriculture. Hence, an attempt was made to evaluate the potential of suppressive activity of nanoparticles produced by an indigenous isolate, Trichoderma atroviride against a tea pathogenic fungus namely Phomopsis theae. The presence of biosynthesised nanoparticles was primarily confirmed through ultraviolet-visible spectroscopy analysis and was characterised using X-ray diffraction and scanning electron microscopy-energy dispersive X-ray analysis to delineate the size, shape and nature of particles...
April 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28458659/biosynthesis-of-silver-nanoparticles-from-protium-serratum-and-investigation-of-their-potential-impacts-on-food-safety-and-control
#3
Yugal K Mohanta, Sujogya K Panda, Akshaya K Bastia, Tapan K Mohanta
Silver nanoparticles play an integral part in the evolution of new antimicrobials against the broad ranges of pathogenic microorganisms. Recently, biological synthesis of metal nanoparticles using plant extracts has been successfully consummated. In the present study, the biosynthesis of silver nanoparticles (AgNPs) was conducted using the leaf extract of plant Protium serratum, having novel ethnomedicinal. The synthesized AgNPs were characterized using UV-Visible spectroscopy, dynamic light scattering spectroscopy (DLS), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28440091/microbial-exopolysaccharide-mediated-synthesis-and-stabilization-of-metal-nanoparticles
#4
Ganesan Sathiyanarayanan, Krishnamoorthy Dineshkumar, Yung-Hun Yang
Exopolysaccharides (EPSs) are structurally and functionally valuable biopolymer secreted by different prokaryotic and eukaryotic microorganisms in response to biotic/abiotic stresses and to survive in extreme environments. Microbial EPSs are fascinating in various industrial sectors due to their excellent material properties and less toxic, highly biodegradable, and biocompatible nature. Recently, microbial EPSs have been used as a potential template for the rapid synthesis of metallic nanoparticles and EPS-mediated metal reduction processes are emerging as simple, harmless, and environmentally benign green chemistry approaches...
April 25, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28438268/fungal-biorecovery-of-gold-from-e-waste
#5
Saskia Bindschedler, Thi Quynh Trang Vu Bouquet, Daniel Job, Edith Joseph, Pilar Junier
Waste electric and electronic devices (e-waste) represent a source of valuable raw materials of great interest, and in the case of metals, e-waste might become a prized alternative source. Regarding gold, natural ores are difficult to mine due to their refractory nature and the richest ores have almost all been exploited. Additionally, some gold mining areas are present in geopolitically unstable regions. Finally, the gold mining industry produces toxic compounds, such as cyanides. As a result, the gold present in e-waste represents a nonnegligible resource (urban mining)...
2017: Advances in Applied Microbiology
https://www.readbyqxmd.com/read/28406604/an-efficient-and-benign-antimicrobial-depot-based-on-silver-infused-mos2
#6
Fangfang Cao, Enguo Ju, Yan Zhang, Zhenzhen Wang, Chaoqun Liu, Wei Li, Yanyan Huang, Kai Dong, Jinsong Ren, Xiaogang Qu
Silver nanoparticles (AgNPs) have been used as a broad-spectrum antimicrobial agent, whose toxicity originates from the localized release of Ag(+) ions. However, the residual AgNPs core could generate potential risk to humans and waste of noble metals. Herein, we infused the cysteine-modified molybdenum disulfide with minimum Ag(+) ions and coated with a layer of cationic polyelectrolyte to construct an efficient and benign antimicrobial depot. The system exhibited much enhanced broad-spectrum antibacterial activity compared with an equivalent amount of silver nitrate, owing to its increasing accessibility of released Ag(+) to the cell walls of microorganisms...
April 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28367838/anti-biofouling-function-of-amorphous-nano-ta2o5-coating-for-vo2-based-intelligent-windows
#7
Jinhua Li, Geyong Guo, Jiaxing Wang, Huaijuan Zhou, Hao Shen, Kelvin W K Yeung
From environmental and health perspectives, the acquisition of a surface anti-biofouling property holds important significance for the usability of VO2 intelligent windows. Herein, we firstly deposited amorphous Ta2O5 nanoparticles on VO2 film by the magnetron sputtering method. It was found that the amorphous nano-Ta2O5 coating possessed a favorable anti-biofouling capability against Pseudomonas aeruginosa as an environmental microorganism model, behind which lay the mechanism that the amorphous nano-Ta2O5 could interrupt the microbial membrane electron transport chain and significantly elevate the intracellular reactive oxygen species (ROS) level...
April 28, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28335213/biosynthesis-of-metal-nanoparticles-novel-efficient-heterogeneous-nanocatalysts
#8
REVIEW
Jose M Palomo, Marco Filice
This review compiles the most recent advances described in literature on the preparation of noble metal nanoparticles induced by biological entities. The use of different free or substituted carbohydrates, peptides, proteins, microorganisms or plants have been successfully applied as a new green concept in the development of innovative strategies to prepare these nanoparticles as different nanostructures with different forms and sizes. As a second part of this review, the application of their synthetic ability as new heterogonous catalysts has been described in C-C bond-forming reactions (as Suzuki, Heck, cycloaddition or multicomponent), oxidations and dynamic kinetic resolutions...
May 5, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28261161/antibacterial-activity-and-synergistic-antibacterial-potential-of-biosynthesized-silver-nanoparticles-against-foodborne-pathogenic-bacteria-along-with-its-anticandidal-and-antioxidant-effects
#9
Jayanta Kumar Patra, Kwang-Hyun Baek
Silver nanoparticles plays a vital role in the development of new antimicrobial substances against a number of pathogenic microorganisms. These nanoparticles due to their smaller size could be very effective as they can improve the antibacterial activity through lysis of bacterial cell wall. Green synthesis of metal nanoparticles using various plants and plant products has recently been successfully accomplished. However, few studies have investigated the use of industrial waste materials in nanoparticle synthesis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28115387/fluorescent-lead-iv-sulfide-nanoparticles-synthesized-by-idiomarina-sp-strain-pr58-8-for-bioimaging-applications
#10
Pallavee Srivastava, Meenal Kowshik
The fabrication of nanoparticles by microorganisms presents a "green" method for generating biocompatible nanomaterials. We discovered the intracellular biosynthesis of fluorescent lead(IV) sulfide nanoparticles by the moderate halophile, Idiomarina sp. strain PR58-8. The bacterium tolerated up to 8 mM Pb(NO3)2 during growth. Non-protein thiols dose-dependently increased in response to metal exposure, which suggests they are involved in the growth of PbS2 crystals and lead detoxification. Using X-ray diffraction, transmission electron microscopy (TEM), high-resolution TEM, and energy dispersive analysis of X-rays, the nanoparticles were characterized as spherical β-PbS2 nanoparticles (PbS2NPs) with a tetragonal crystal lattice, a crystallite domain size of 2...
April 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27926882/effect-of-reduced-humic-acid-on-the-transport-of-ferrihydrite-nanoparticles-under-anoxic-conditions
#11
Peng Liao, Wenlu Li, Dengjun Wang, Yi Jiang, Chao Pan, John D Fortner, Songhu Yuan
Humic acid (HA) occurs ubiquitously in the subsurface environments and is well-known to play a critical role in the fate and transport of ferrihydrite nanoparticles (NPs) and NPs-associated contaminants. Under anoxic conditions, HA can readily be reduced by microorganisms or geochemical reducing species, and the mechanisms and kinetics of ferrihydrite reduction by reduced HA (HAred) are well-documented; however, the role of these redox reactions on the transport of ferrihydrite NPs is largely underestimated...
February 1, 2017: Water Research
https://www.readbyqxmd.com/read/27908405/biosynthesis-of-selenium-nanoparticles-using-enterococcus-faecalis-and-evaluation-of-their-antibacterial-activities
#12
Sara Shoeibi, Mohammad Mashreghi
Microorganisms are capable of synthesizing metal nanoparticles, and specifically Enterococcus faecalis bacteria were tested for its ability to synthesize selenium nanoparticles (Se-NPs) from sodium selenite. The biosynthesized Se-NPs were spherical in shape with the size range of 29-195nm. Also, the TEM microscopy showed the accumulation of nano-structures as extracellular deposits. The ability of the bacteria to tolerate high levels of toxic selenite was studied by changing with different concentrations of sodium selenite (0...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908256/a-review-on-nano-antimicrobials-metal-nanoparticles-methods-and-mechanisms
#13
Edris Hoseinzadeh, Pouran Makhdoumi, Parisa Taha, John Stelling, Hooshyar Hossini, Mohammad Amjad Kamal, Ghulam Md Ashraf
Nanotechnology is a scientific and engineering technology conducted at the Nano-scale, such as in the fields of compound fabric manufacturing, food processing, agricultural processing, and engineering, as well as in medical and medicinal application. In recent decade, nanomaterial applications for antimicrobial works have been interested by many researchers. Available reports show that some of the metal oxide Nanoparticles including; Al2O3, TiO2, ZnO, CuO, Co3O4, In2O3, MgO, SiO2, ZrO2, Cr2O3, Ni2O3, Mn2O3, CoO, and Nickel oxide have toxicity toward several microorganisms and they could successfully kill numerous bacteria...
December 1, 2016: Current Drug Metabolism
https://www.readbyqxmd.com/read/27866609/efficient-continuous-biosynthesis-of-silver-nanoparticles-by-activated-sludge-micromycetes-with-enhanced-tolerance-to-metal-ion-toxicity
#14
Dmitry V Tyupa, Sergei V Kalenov, Marina M Baurina, Liubov M Yakubovich, Alexander N Morozov, Ruslan M Zakalyukin, Vladimir V Sorokin, Dmitry A Skladnev
The method for producing AgNPs by granules of activated sludge micromycetes with enhanced tolerance to metal ion toxicity - Penicillium glabrum, Fusarium nivale and Fusarium oxysporum has been developed; the optimum conditions for AgNP biosynthesis being found: the Ag(+) ion concentration, duration of the contact of microbial cells with silver ions, a growth phase of microorganisms, medium composition, a рН value, mixing conditions, and also lighting intensity. The effect of Cl(-), SO4(2-) and HPO4(2-) ions binding Ag(+) ions was eliminated, that brought to significant increase of the yield of NPs...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27866607/synthesis-of-silver-nanoparticles-by-endosymbiont-pseudomonas-fluorescens-ca-417-and-their-bactericidal-activity
#15
Baker Syed, Nagendra Prasad M N, Dhananjaya B L, Mohan Kumar K, Yallappa S, Satish S
The present study emphasizes on biogenic synthesis of silver nanoparticles and their bactericidal activity against human and phytopathogens. Nanoparticle synthesis was performed using endosymbiont Pseudomonas fluorescens CA 417 inhabiting Coffea arabica L. Synthesized nanoparticles were characterized using hyphenated spectroscopic techniques such as UV-vis spectroscopy which revealed maximum absorption 425nm. Fourier transform infrared spectroscopy (FTIR) analysis revealed the possible functional groups mediating and stabilizing silver nanoparticles with predominant peaks occurring at 3346 corresponding to hydroxyl group, 1635 corresponding carbonyl group and 680 to aromatic group...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27818053/biosensors-for-plant-pathogen-detection
#16
REVIEW
Mohga Khater, Alfredo de la Escosura-Muñiz, Arben Merkoçi
Infectious plant diseases are caused by pathogenic microorganisms such as fungi, bacteria, viruses, viroids, phytoplasma and nematodes. Worldwide, plant pathogen infections are among main factors limiting crop productivity and increasing economic losses. Plant pathogen detection is important as first step to manage a plant disease in greenhouses, field conditions and at the country boarders. Current immunological techniques used to detect pathogens in plant include enzyme-linked immunosorbent assays (ELISA) and direct tissue blot immunoassays (DTBIA)...
July 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27679615/antimicrobial-activity-and-mechanism-of-inhibition-of-silver-nanoparticles-against-extreme-halophilic-archaea
#17
Rebecca S Thombre, Vinaya Shinde, Elvina Thaiparambil, Samruddhi Zende, Sourabh Mehta
Haloarchaea are salt-loving halophilic microorganisms that inhabit marine environments, sea water, salterns, and lakes. The resistance of haloarchaea to physical extremities that challenge organismic survival is ubiquitous. Metal and antibiotic resistance of haloarchaea has been on an upsurge due to the exposure of these organisms to metal sinks and drug resistance genes augmented in their natural habitats due to anthropogenic activities and environmental pollution. The efficacy of silver nanoparticles (SNPs) as a potent and broad spectrum inhibitory agent is known, however, there are no reports on the inhibitory activity of SNPs against haloarchaea...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27672437/preparation-and-characterization-of-photoactive-antimicrobial-graphitic-carbon-nitride-g-c3n4-films
#18
John H Thurston, Necia M Hunter, Kenneth A Cornell
Photoactive films derived from nanostructured samples of metal-free, intermediate band gap semiconductor graphitic carbon nitride (ns-g-C3N4) have been synthesized and characterized for their particle properties and antimicrobial activity. Physical characterization reveals that these materials are composed of discrete nanoparticles whose dimensions range from 200 nm to 700 nm. Investigation of the photochemical reactivity of ns-g-C3N4 using coumarin-3-carboxylic acid (3-CCA) indicates that this material produces reactive oxygen species (ROS) under visible radiation...
2016: RSC Advances
https://www.readbyqxmd.com/read/27652264/biosynthesis-and-characterization-of-silver-nanoparticles-by-aspergillus-species
#19
Kamiar Zomorodian, Seyedmohammad Pourshahid, Arman Sadatsharifi, Pouyan Mehryar, Keyvan Pakshir, Mohammad Javad Rahimi, Ali Arabi Monfared
Currently, researchers turn to natural processes such as using biological microorganisms in order to develop reliable and ecofriendly methods for the synthesis of metallic nanoparticles. In this study, we have investigated extracellular biosynthesis of silver nanoparticles using four Aspergillus species including A. fumigatus, A. clavatus, A. niger, and A. flavus. We have also analyzed nitrate reductase activity in the studied species in order to determine the probable role of this enzyme in the biosynthesis of silver nanoparticles...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27630128/reduction-of-selenite-to-se-0-nanoparticles-by-filamentous-bacterium-streptomyces-sp-es2-5-isolated-from-a-selenium-mining-soil
#20
Yuanqing Tan, Rong Yao, Rui Wang, Dan Wang, Gejiao Wang, Shixue Zheng
BACKGROUND: Selenium (Se) is an essential trace element in living systems. Microorganisms play a pivotal role in the selenium cycle both in life and in environment. Different bacterial strains are able to reduce Se(IV) (selenite) and (or) Se(VI) (selenate) to less toxic Se(0) with the formation of Se nanoparticles (SeNPs). The biogenic SeNPs have exhibited promising application prospects in medicine, biosensors and environmental remediation. These microorganisms might be explored as potential biofactories for synthesis of metal(loid) nanoparticles...
September 15, 2016: Microbial Cell Factories
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