The phrase "alter the sample" is correct and usable in written English.
You can use it when discussing modifications or changes made to a sample in various contexts, such as scientific research or data analysis.
Example: "In order to achieve more accurate results, we need to alter the sample before conducting the experiment."
Alternatives: "modify the sample" or "change the sample".
When pulling the samples I usually fallow a W or M pattern on the ATV and it is important to avoid wet spots and we also try not to sample in the headlands because they can both alter the sample.
Yet this approach suffers from significant sources of disorder: electrochemical reactions can damage or alter the sample, and the ions of the electrolyte and various dissolved contaminants sit Angstroms from the electron system.
However, lower processing success rates for the more complex rotary-beam signals do reduce the yield of fundamental frequencies and alter the sample variances for the retrieved parameters and the detection rates for harmonics.
These are obtained non-destructively, without inducing fracture on the sample or requiring abrasive techniques that would potentially damage or alter the sample during sample preparation.
Although the formation of Raman-based species maps is not fast, the technique offers the ability to use intrinsic chemical differences between cells to create multidimensional maps of microbial structures without extensive knowledge of the cells' genomes and without requiring any invasive sample preparation that could potentially alter the sample under study.
The different vaporization behavior of each component of an oil sample will alter the sample's chemical and isotopic composition, thus likely influencing the application of some identification methods based on these properties (Cañipa-Morales et al. 2003).
Forward random walks are first processed in stages, each using a fixed sample size, and information from stage k is used to alter the sampling and weighting procedure in stage k+1.
A possible solution, see [16], to restore sample diversity without altering the sample statistics is to move the current particles to new locations using a Markov chain transition kernel, that is, invariant to the conditional mixture pdf.
In this regard, we can use HSI system to measure the spectral signature of chemical components, like bacterial pigments, inside the cells without altering the sample and its measurements even in a heterogeneous medium where spectrophotometric signal is not resolutive.
The power and significance level of the logrank test in the non-PH and PH scenarios are also studied without altering the sample size.
