Transcription and translation of mRNA's are coordinated processes in bacteria. We have previously shown that a mutant form of EF-Tu (Gln125Arg) in Salmonella Typhimurium with a reduced affinity for aa-tRNA, causes ribosome pausing, resulting in an increased rate of RNase E-mediated mRNA cleavage, causing extremely slow growth, even on rich medium. The slow growth phenotype is reversed by mutati...

White matter strips extracted from adult guinea pig spinal cords were subjected to tensile strain (stretch) injury ex vivo. Strain was carried out at three magnitudes (25, 50, and 100%) and two strain rate regimens: slow (0.006-0.008 s(-1)) and fast (355-519 s(-1)). The cord samples were monitored physiologically using a double sucrose-gap technique and anatomically using a horseradish peroxida...

Advanced high strength steels (AHSS) have recently attracted great attention because of their superior mechanical properties. A modern group of these steels, known as twinning induced plasticity (TWIP) steels, shows a unique combination of strength and ductility even at high rates of strain. In order to examine the functionality of such steels in dynamic loading conditions, their mechanical beh...

background recently, assessment of the atrial motion and deformation indices obtained via doppler myocardial imaging (dmi) has been proposed as a new method of exploring the atrial function. objective our aim was to assess the right atrial (ra) regional function using myocardial velocities, strain, and strain rate imaging (sri) and compare it with the function of the inter-atrial septum (ias) a...

In this work, dynamic mechanical properties of three high-manganese steels with TRIP/TWIP or fully TWIP characteristics are studied. High strain rate experiments in the range of true strain rates between ~500 and 1800 /s are conducted using a dynamic torsional testing setup. All the three steels show a positive strain rate sensitivity in the intermediate range of strain rates (up to 500 /s). Bu...

The effect of strain rate on the tensile deformation behavior additively manufactured CrNi stainless steel with different fractions δ-ferrite (14 % in as-built material and 6 after post-built solid-solution treatment) was revealed focus stage macroscopic strain-induced γ → α' martensitic transformation. Tension tests were performed initial rates 5 ×10−4, ×10−3, ×10−2 s−1 at two temperatures, wh...

the aim of this study was to investigate the effect of different music rhythms on cardio respiratory responses during incremental exercises in young men. for this purpose, 17 non-athlete healthy males (ages: 19.76±0.97 yr, height: 176±6.72 cm, weight: 68.5±5.95 kg) voluntarily participated in this study. they performed bruce protocol until exhaustion with no music, slow music and fast music con...

[1] Mechanical properties of rocks are characterized by their notable dependence on the applied deformation rate. However, little is known about the strain rate dependence of fluid flow properties since most laboratory tests are conducted using a single, high strain rate. We have investigated the effect of loading rate on the permeability of porous sandstones by carrying out triaxial compressio...