The phrase "an improved sample" is correct and usable in written English.
You can use it when referring to a version of a sample that has been enhanced or made better in some way.
Example: "After analyzing the feedback, we have developed an improved sample for the next round of testing."
Alternatives: "a refined sample" or "a better sample".
Therefore, there is a need for an improved sample preparation method that produces a reliable VOC profile of urine samples analysed by headspace-SPME-GC-MS without degrading the column.
Two samples were used: the initial one, composed of 117 case studies, without a pre-selection of the cases analysed, and an improved sample, composed of 195 claddings, with more complete and reliable data.
When a LC-HRMS protocol with an improved sample desalting method was applied (see below), freeze dried samples were dissolved in 80 µl of ice-cold, 25 mM ammonium formate buffer (pH 3.5, 2% methanol), the suspension was centrifuged (14,000 g, 3 min, 0°C), and the supernatant was used for LC-HRMS analysis.
Several years ago, an improved sample preparation kit was introduced [ 14].
Here, we present our findings and report an improved sample preparation procedure using polymeric hydrophilic lipophilic balanced reversed-phase cartridges.
Here, we first introduce fast (linear-time) algorithms for computing both Shapley values and HED scores, and then apply and compare these scores with FP scores across an improved sample of 10,000 near-complete (5139 species) mammal trees.
In order to examine the stramenopile "paraphyly" in GapC1 phylogenies, an improved sampling of stramenopile GapC1 genes is needed.
At the same time one may wonder how the trees/MSNs would have looked like with an improved sampling of populations.
The program will continue well-water testing from 2006 to 2010 but with an improved sampling strategy and a QA/QC protocol for laboratory measurements that will include wells containing < 50 μg/L As.
However, recent analyses incorporating better phylogenetic models and an improved sampling of the archaeal domain have generally supported the competing eocyte hypothesis, in which core genes of eukaryotic cells originated from within the Archaea, with important implications for eukaryogenesis.
Baltussen et al. [ 53] introduced a new and improved sample preparation technique based on the same principles as SPME: stir-bar sorptive extraction (SBSE).
