Results 51 to 60 of about 981,613 (404)
Solvent tolerance in Gram-negative bacteria
Current Opinion in Biotechnology, 2012 Bacteria have been found in all niches explored on Earth, their ubiquity derives from their enormous metabolic diversity and their capacity to adapt to changes in the environment. Some bacterial strains are able to thrive in the presence of high concentrations of toxic organic chemicals, such as aromatic compounds, aliphatic alcohols and solvents.
Segura, Ana +6 more
openaire +5 more sources
The multifarious roles of Tol-Pal in Gram-negative bacteria
FEMS Microbiology Reviews, 2020 In the 1960s several groups reported the isolation and preliminary genetic mapping of Escherichia coli strains tolerant towards the action of colicins. These pioneering studies kick-started two new fields in bacteriology; one centred on how bacteriocins ...
J. Szczepaniak +2 more
semanticscholar +1 more source
Extended-spectrum ß-lactamases in gram negative bacteria
Journal of Global Infectious Diseases, 2010 Extended-spectrum ß-lactamases (ESBLs) are a group of plasmid-mediated, diverse, complex and rapidly evolving enzymes that are posing a major therapeutic challenge today in the treatment of hospitalized and community-based patients.
Deepti Rawat, Deepthi Nair
doaj +1 more source
Antibiotics, 2020 Drug-resistant Acinetobacter baumannii (A. baumannii) infections are a critical global problem, with limited treatment choices. This study aims to determine the in vitro activities of colistin–sitafloxacin combinations against multidrug-, carbapenem- and
Vipavee Rodjun +6 more
doaj +1 more source
Destabilization of α-helical structure in solution improves bactericidal activity of antimicrobial peptides: Opposing effects on bacterial and viral targets [PDF]
, 2016 We have previously examined the mechanism of antimicrobial peptides on the outer membrane of vaccinia virus. Here we show that the formulation of peptides LL37 and magainin-2B amide in polysorbate 20 (Tween-20™) results in greater reductions in virus ...
Beck, Konrad +4 more
core +2 more sources
On the essentiality of lipopolysaccharide to Gram-negative bacteria [PDF]
Current Opinion in Microbiology, 2013 Lipopolysaccharide is a highly acylated saccharolipid located on the outer leaflet of the outer membrane of Gram-negative bacteria. Lipopolysaccharide is critical to maintaining the barrier function preventing the passive diffusion of hydrophobic solutes such as antibiotics and detergents into the cell.
Ge Zhang +2 more
openaire +3 more sources
Bacteria colonies modify their shear and compressive mechanical properties in response to different growth substrates [PDF]
arXiv, 2023 Bacteria build multicellular communities termed biofilms, which are often encased in a self-secreted extracellular matrix that gives the community mechanical strength and protection against harsh chemicals. How bacteria assemble distinct multicellular structures in response to different environmental conditions remains incompletely understood. Here, we
arxiv
Effect of motility on the transport of bacteria populations through a porous medium [PDF]
Phys. Rev. Fluids 4, 013102 (2019), 2018 The role of activity on the hydrodynamic dispersion of bacteria in a model porous medium is studied by tracking thousands of bacteria in a microfluidic chip containing randomly placed pillars. We first evaluate the spreading dynamics of two populations of motile and non-motile bacteria injected at different flow rates.
arxiv +1 more source
Efflux-mediated multiresistance in Gram-negative bacteria [PDF]
, 2004 Multiresistance in Gram-negative pathogens, particularly Pseudomonas aeruginosa, Stenotrophomonas maltophilia, Acinetobacter spp. and the Enterobacteriaceae, is a significant problem in medicine today.
Poole, K.
core +1 more source
Acquisition of siderophores in Gram-negative bacteria
Nature Reviews Molecular Cell Biology, 2003 The outer membrane of Gram-negative bacteria constitutes a permeability barrier that protects the cell from exterior hazards, but also complicates the uptake of nutrients. In the case of iron, the challenge is even greater, because of the scarcity of this indispensable element in the cell's surroundings.
Faraldo-Gómez, J, Sansom, M
openaire +3 more sources