For example, it has been reported that the inter-pulse gap may be utilized to improve the specificity of CEST agents [28, 29].
In addition to the pulse shape, pulsed saturation brings additional factors to take into account for CEST contrast optimization: individual pulse length, inter-pulse gap, number of pulses, etc.
The possible inter-pulse gap lengths however, were limited in such a way that at least a single pulse would be fired within any active period of the system.
For transfection, primary human T-cells (8x10) were washed with PBS, resuspended in 200 μl Optimem [Invitrogen] and transfected with siRNA in a 4 mm cuvette [BioRad] with a square-wave pulse using a Genepulser X-cell [BioRad] at 1000 V, 0.5 ms, 2 pulses, gap between pulses 5 s.
The sound was produced in 1-s pulses fired in succession with inter-pulse gaps of random lengths.
Process variable machining parameters used are peak current, ON-time (pulse duration), gap voltage and nano aluminum concentration.
Analysis of variance was applied to investigate the influence of process parameters and their interactions viz., pulse current, gap voltage, pulse on time and pulse off time on material removal rate (MRR), electrode wear ratio (EWR) and surface roughness (SR).
In contrast to no-memory signaling, there are no deterministic gaps and pulses spread to all regions of the symbol interval. .
Chromatin was sheared for seven rounds of 20 s (1 s pulse, 0.5 s gap) on-off pulses with a 500-Watt Ultrasonic Processor (Cole-Parmer Instrument Co., Vernon Hills, IL, USA) equipped with a microtip and set to 30% of maximum power.
Secondly, the machining parameters, including the gap voltage, pulse interval, pulse width and peak current in the traditional EDM process, are optimized by experiments, and the optimized condition is applied to the horizontal ultrasonic electrical discharge machining (HU-EDM) process.
Basically, each nucleus goes through a stereotypical series of expression pulses of different gap genes.
