For the purpose of a randomized-controlled trial involving Coronary Artery Bypass Graft surgery (CABG), we sought to establish a flow cytometric assay to detect ROS production in granulocytes (PMN) that is easy to perform, does not require a specialised laboratory on-site and is relatively insensitive to delay between sample preparation and analysis.
It is worth mentioning that the time spanned between sample preparation and analysis varied for the muscle and liver sample, which implies that there are different fractions of depolarized mitochondria in each preparation.
Effort was made to ensure that minimal time elapsed between sample preparation and scanning/image gathering to minimize changes in pollen size, which may have occurred with time (Gordon and Prentice, 1977).
The signals for 13 b can in fact be seen emerging in the spectrum of 13 a as a result of the short exposure to light that occurred between sample preparation and data acquisition.
By tagging specimens with molecular barcodes, labs can multiplex several treatments and controls into a single sequencing run, making it possible to survey and compare different specimens with very few sequencing jobs, dramatically shrinking the time between sample preparation and data analysis and the sequencing costs.
Repeated washes of coverslips with PBS were carried out between steps, and sample preparations and visualization were carried out at 25°C unless stated otherwise.
A significant difference in the mean composition of the individual sulfur components between sample preparation methods A, B, and C was determined with a Student's t test and a 95% confidence limit (p < 0.05).
Our TPM values do not permit a statistical analysis of differential gene expression, but instead provide metrics that can be compared between aggressive and non-aggressive polyp transcriptomes, while controlling for transcript size and discrepancies between sample preparation [ 74, 80].
With c mes the measured number of counts in the photopeak window, T acq the acquisition duration, A prep the prepared activity, Δt the time between the sample preparation and the acquisition, and T 1/2 the physical half-life of the radionuclide.
Working equipment and work spaces were thoroughly cleaned between every sample preparation, and no more than six samples were handled simultaneously.
