Elucidation of one step synthesis of PEGylated CuFe bimetallic nanoparticles. Antimicrobial activity of CuFe@PEG vs Cu@PEG.

Elucidation of one step synthesis of PEGylated CuFe bimetallic nanoparticles. Antimicrobial activity of CuFe@PEG vs Cu@PEG. J Inorg Biochem. 2017 Sep 23;177:159-170 Authors: Antonoglou O, Giannousi K, Arvanitidis J, Mourdikoudis S, Pantazaki A, Dendrinou-Samara C Abstract There is a growing field of research on the physicochemical properties of bimetallic nanoparticles (BMNPs) and their potential use in different applications. Meanwhile, their antimicrobial activity is scarcely reported, although BMNPs can potentially achieve unique chemical transformations and synergetic effects can be presented. Towards this direction a reproducible simple hybrid polyol process under moderate temperature solvothermal conditions has been applied for the isolation of non-oxide contaminated bimetallic CuFe nanoparticles (NPs). 1,2-propylene glycol (PG), tetraethylene glycol (TEG) and polyethylene glycol (PEG 8000), that exhibit different physicochemical properties, have been utilized to regulate the size, structure, composition and the surface chemistry of NPs. The BMNPs were found to be of small crystalline size, 30-45nm, and high hydrophilicity, different wt% percentage of organic coating and variable hydrodynamic size and surface charge. The antimicrobial activity of the BMNPs was evaluated against the bacterial strains B. subtilis, E. coli and fungus S. cerevisiae. The IC50 values for CuFe NPs were found significantly lower compared with Cu NPs of the same size, revea...
Source: Journal of Inorganic Biochemistry - Category: Biochemistry Authors: Tags: J Inorg Biochem Source Type: research

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Abstract Biological denitrification is a promising and green technology for air pollution control. To investigate the nitric oxide reductase (NOR) that dominates NO reduction efficiency in biological purification, the heterologous prokaryotic expression system of the norB gene, which encodes the core peptide of the catalytic reduction structure in the NOR from Achromobacter denitrificans strain TB, was constructed in Escherichia coli BL21 (DE3). Results showed that the 1218 bp-long norB gene was expressed at the highest level under 1.0 mM IPTG for 5 h at 30 °C, and the relative expression a...
Source: Chemosphere - Category: Chemistry Authors: Tags: Chemosphere Source Type: research
Publication date: June 2020Source: Journal of Global Antimicrobial Resistance, Volume 21Author(s): Shengzhi Yang, Wenwen Deng, Shuliang Liu, Xiumei Yu, Ghulam Raza Mustafa, Shujuan Chen, Li He, Xiaolin Ao, Yong Yang, Kang Zhou, Bei Li, Xinfeng Han, Xuebin Xu, Likou Zou
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
This study is aimed at obtaining the pathway in the microbial tumorigenesis of PC. Microarray datasets GSE27890, GSE46234, and GSE17610 were downloaded from the GEO (Gene Expression Omnibus) database. Differential analysis was performed for every single gene chip using the R software package ("Limma" package), and functional enrichment analyses were carried out by DAVID (Database for Annotation, Visualization and Integrated Discovery). The PPI (protein-protein interaction) network was constructed with the Search Tool for the Retrieval of Interacting Genes (STRING). The survival analysis was performed by GEPIA and...
Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
Worldwide use of pneumococcal conjugate vaccines (PCVs) had reduced the incidence of pneumonia and invasive pneumococcal disease (IPD) in children.1,2 Despite increasing vaccine coverage and a reduction in the prevalence of IPD, Streptococcus pneumoniae remains a significant cause of non-Shiga toxin-producing Escherichia coli hemolytic uremic syndrome (HUS) in children.3 HUS is characterized by the presence of the clinical triad of microangiopathic hemolytic anemia, thrombocytopenia, and acute kidney injury.
Source: Pediatrics and Neonatology - Category: Perinatology & Neonatology Authors: Tags: Editorial Source Type: research
In this study, we demonstrated a shift in the specificity of E. coli cell-based biosensors from the detection of inorganic arsenic to that of organic arsenic, specifically phenylarsine oxide (PAO), through the genetic engineering of ArsR. By modulating the number and location of cysteines forming coordinate covalent bonds with arsenic species, an E. coli cell-based biosensor that was specific to PAO was obtained. Despite its restriction to PAO at the moment, it offers invaluable evidence of the potential to generate new biosensors for sensing organic arsenic species through the genetic engineering of ArsR.
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
Publication date: Available online 28 May 2020Source: Journal of Microbiology, Immunology and InfectionAuthor(s): Ho Yin Pekkle Lam, Tina Tu-Wen Chen, Yu-Chuan Tseng, Kai-Chih Chang, Ting-Hua Yang, Shih-yi Peng
Source: Journal of Microbiology, Immunology and Infection - Category: Microbiology Source Type: research
[Comparación de los perfiles de resistencia antimicrobiana de Escherichia coli uropatógena e incidencia de la producción de betalactamasas de espectro extendido en tres establecimientos privados de salud de Perú]. Biomedica. 2020 May 01;40(Supl. 1):139-147 Authors: Marcos-Carbajal P, Galarza-Pérez M, Huancahuire-Vega S, Otiniano-Trujillo M, Soto-Pastrana J Abstract Introducción. La aparición de enterobacterias multirresistentes y productoras de betalactamasas de espectro extendido en pacientes ambulatorios con infecciones urinarias representa un problema...
Source: Biomedica : Revista del Instituto Nacional de Salud - Category: International Medicine & Public Health Tags: Biomedica Source Type: research
This paper presents a CMOS ion-sensitive-field-effect-transistor (ISFET) array with superior offset distribution tolerance, resolution and linearity for long-term bacterial metabolism monitoring. A floating gate ISFET is adopted as the sensing front end to maximize ion sensitivity and support ultra-long-term measurement. To solve the DC offset issue induced by trapped chargers and drifts in each ISFET sensor, a complementary readout scheme with column offset compensation is proposed. P-type and N-type source followers are combined to cover a wide range of input DC offsets while maintaining small area and high linearity. Th...
Source: IEEE Transactions on Biomedical Circuits and Systems - Category: Biomedical Engineering Source Type: research
Conclusion: Recurrent pancreatitis is suggested as the etiology of atypical HUS in this patient and this condition should be recognized and treated in a timely manner for optimal clinical outcomes.
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research
In previous studies, we have shown that atypical enteropathogenic Escherichia coli (aEPEC) strains are important diarrheal pathogens among Brazilian children. In the characterization of a collection of 126 aEPEC ...
Source: BMC Microbiology - Category: Microbiology Authors: Tags: Research article Source Type: research
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