The antimicrobial and antibiofilm activities of copper(II) complexes

Beeton, Michael L.; Aldrich‐Wright, Janice R.; Bolhuis, Albert

doi:10.1016/j.jinorgbio.2014.07.012

Cited by 69 publications

(45 citation statements)

References 35 publications

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“…125 Copper 353 on the other hand, is reported to enhance bacterial aggregation at toxic levels, which is 354 thought to act as protective responses to stress. 126,127 Presence of copper in drinking water 355 has also been shown to induce VBNC state on the opportunistic pathogen P. aeruginosa. Decreasing temperatures from 37°C to 25°C or 15°C were found to elevate the intracellular 415 c-di-GMP level in the pathogenic V. cholerae, in turn, enhancing biofilm growth.…”

Section: (Based 340mentioning

confidence: 99%

Understanding, Monitoring, and Controlling Biofilm Growth in Drinking Water Distribution Systems

Liu¹,

Gunawan

Barraud

et al. 2016

Environ. Sci. Technol.

343

174

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ABSTRACT:In drinking water distribution systems (DWDS), biofilms are the predominant 1 mode of microbial growth with the presence of extracellular polymeric substance (EPS) 2 protecting the biomass from environmental and shear stresses. Biofilm formation poses a 3 significant problem to the drinking water industry as a potential source of bacterial 4 contamination, including pathogens and in many cases also affecting the taste and odor of 5 drinking water and promotes corrosion of pipes. This article critically reviews important 6 research findings on biofilm growth in DWDS, examining the factors affecting their 7 formation and characteristics, as well as the various technologies to characterize, monitor and 8 ultimately, to control their growth. Research indicates that temperature fluctuations 9 potentially affect not only the initial bacteria-to-surface attachment but also the growth rates 10 of biofilms. For the latter, the effect is unique for each type of biofilm-forming bacteria -11 ammonia oxidizing bacteria for example, grow more developed biofilms at typical summer 12 temperature of 22C compared to 12C in fall , while the opposite occurs for the pathogenic 13 RNA, EPS, protein and lipid stains) and electron microscopy imaging (ESEM). Importantly, 24 thorough identification of microbial fingerprints in drinking water biofilms is achievable with 25 3

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Section: (Based 340mentioning

confidence: 99%

Understanding, Monitoring, and Controlling Biofilm Growth in Drinking Water Distribution Systems

Liu¹,

Gunawan

Barraud

et al. 2016

Environ. Sci. Technol.

343

174

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“…[1][2][3][4][5], antibacterial (Ag, Au, Hg, Fe, Cu, etc.) [1,2,6] and antiviral activities (Co, V, etc.) [1,2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and detailed characterization of cis-dichloridobispicolinatoruthenate(III) as solid and in solution

Impert

Katafias

Wrzeszcz

et al. 2016

Journal of Coordination Chemistry

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Three water-soluble ruthenium(III) compounds, Y[cis-RuCl 2 (pic) 2 ]⋅nH 2 O (where pic = picolinate anion, Y = H(Hpic) 2 + (1), H 2 pic + (2) or K + (3), n = 2, 1.5 and 2.5, respectively), were synthesized and their X-ray structures determined. Compound 1 was fully characterized both as solid and in aqueous solution by elemental analysis, magnetic susceptibility measurements, EPR, IR and UV-Vis spectroscopy, cyclic voltammetry, microwave plasma atomic emission and mass spectrometry, capillary electrophoresis and chromatographic methods. It was shown that the coordination geometry around the low spin (S = ½) Ru III center is distorted octahedral with the chloride ligands in a cis configuration. Furthermore, all the measurements showed that the structures in the solid state and solution are absolutely identical with the cis-[RuCl 2 (pic) 2 ] − anion being inert in aqueous solution. Microbial studies showed that 1 exerts a strong inhibition on the growth and increased mortality level of the bacterial strains -E. coli, Pseudomonas sp., Sarcina sp., Micrococcus sp., Serratia sp., Bacillus cereus, B. subtilis and yeastSaccharomyces cerevisiae.

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“…Cu 2? complex also demonstrated good antimicrobial properties (Beeton et al 2014), however, copper nanoparticles have been demonstrated to possess higher antimicrobial activities than the equivalent amount of copper containing compounds such as CuCl 2 because copper nanoparticles have larger surface to volume ratio, crystalline structure. The more reactive sites of copper nanoparticles therefore could produce more reactive oxygen species (ROS) that could result in considerable lipid peroxidation, protein oxidation and DNA degradation and finally killing the cells (Rai et al 2009;Chatterjee et al 2014).…”

Section: Resultsmentioning

confidence: 99%

Drying cellulose-based materials containing copper nanoparticles

et al. 2015

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Carboxymethyl cellulose and TEMPO nanofibrillated cellulose were used as substrates to synthesize copper nanoparticles from copper sulfate and they were subsequently dried using spray-, freezeand modified freeze-drying processes. Morphological characterization, particle size distribution, copper quantification and the oxidation state of copper were evaluated. The morphology and the size distribution of the dried particles were characterized using scanning electron microscopy-energy dispersive X-ray spectroscopy; particle size distribution was evaluated using laser diffraction; copper content was determined by inductively coupled plasma-optical emission spectroscopy; and finally, the oxidation state of copper was determined using X-ray photoelectron spectroscopy and X-ray diffraction. Plate-like structures of cellulose and cellulose-copper nanoparticles were formed after the freeze-drying process, with length and width over hundreds of microns. Most of the spray dried particles exhibited spherical shapes with the particle size ranging from around 300 nm to several microns. The spray drying process caused more copper loss compared with freeze drying, most probably because of the additional steps required to perform the spray drying. XPS results showed that the state of oxidation of the final dried material depends on the specific substrate. CMC surfaces exhibit mostly Cu 0 and/or Cu ? . On the contrary TNFC surfaces present mostly Cu 2? . Solvent exchange process using ethanol and butanol creates more porous structures on the CMC substrates. A solvent exchange process using ethanol and tertbutanol sequence facilitates the formation of a more porous structure on TEMPO nanofibrillated cellulose.

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The antimicrobial and antibiofilm activities of copper(II) complexes

Cited by 69 publications

References 35 publications

Understanding, Monitoring, and Controlling Biofilm Growth in Drinking Water Distribution Systems

Understanding, Monitoring, and Controlling Biofilm Growth in Drinking Water Distribution Systems

Synthesis and detailed characterization of cis-dichloridobispicolinatoruthenate(III) as solid and in solution

Drying cellulose-based materials containing copper nanoparticles

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