Results 131 to 140 of about 212,665 (269)
YtfK activates the stringent response by triggering the alarmone synthetase SpoT in Escherichia coli
, 2019 International audienceThe stringent response is a general bacterial stress response that allows bacteria to adapt and survive adverse conditions. This reprogramming of cell physiology is caused by the accumulation of the alarmone (p)ppGpp which, in ...
Djendli, Meriem +5 more
core +1 more source
Advanced Engineering Materials, EarlyView.A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora +4 more
wiley +1 more source
Protein-Ligand Interactions in Scarcity: The Stringent Response from Bacteria to Metazoa, and the Unanswered Questions. [PDF]
Int J Mol Sci, 2023 Barik S.
europepmc +1 more source
Evaluating Energy Absorption Performance of Filled Lattice Structures
Advanced Engineering Materials, EarlyView.Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney +2 more
wiley +1 more source
Stringent response ensures the timely adaptation of bacterial growth to nutrient downshift. [PDF]
Nat Commun, 2023 Zhu M, Dai X.
europepmc +1 more source
Galleria mellonella as an alternative infection model for Yersinia pseudotuberculosis
, 2009 We report that larvae of the wax moth (Galleria mellonella) are susceptible to infection with the human enteropathogen Yersinia pseudotuberculosis at 37 degrees C. Confocal microscopy demonstrated that in the initial stages of infection the bacteria were
Champion, Olivia L +10 more
core +1 more source
Advanced Engineering Materials, EarlyView.Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley +1 more source
Karl Popper and the Mechanisms of Hydrogen Embrittlement
Advanced Engineering Materials, EarlyView.Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley +1 more source
[The stringent response--bacterial mechanism of an adaptive stress response].
Postepy biochemii, 2006 The stringent response is a key regulatory reaction exhibited by bacteria in response to amino acid deprivation or carbon, nitrogen and phosphate limitation. In E. coli, the products of the relA and spoT genes regulate accumulation of the effector molecules of the stringent response--guanosine tetra- and pentaphosphates (ppGpp and pppGpp respectively).
Grazyna, Dabrowska +2 more
openaire +1 more source