The phrase "a set of approximately" is correct and usable in written English.
It can be used when you want to indicate an estimated quantity or number of items in a collection or group.
Example: "The study analyzed a set of approximately 200 participants to gather data on their health behaviors."
Alternatives: "a group of roughly" or "a collection of about".
Cis-regulatory elements were identified in a set of approximately 150 co-expressed genes identified for each OsEUL gene.
The results show that, e.g., a set of approximately 430 substructures is required to consider the full variability for 90% of all molecules in the Ligand Expo database.
From these contextual factors, a set of approximately 8,000 contextual questions were designed and the HSMM system was trained using these questions.
For the systematic exploration of both antibodies' binding specificities, we used a set of approximately 35 cocaine analogues as structural probes by determining their relative binding affinities (RBAs) using an enzyme-linked immunosorbent competition assay.
This fraction is lower than that identified by Zarfl et al. [10] on the Canadian Domestic Substance List (CDSL; 3.1% out of 5,091 compounds) and also smaller than the fraction of the findings of Strempel et al. [11] who detected 3% of PBT chemicals by screening a set of approximately 95,000 compounds.
Furthermore, the response time was calculated as the average of the time required by each component to process a set of approximately 1350 frames that composes a video sample of 48 seconds (28 frames per second), each frame with a resolution of 640x480 pixels and a color depth of 24 bits.
The hand model is constructed using a set of quadrics, approximately representing the anatomy of a real human hand, as represented in Figure 3.
The sample was first split in half, creating a training set and a validation set of approximately equal sizes.
Targeted mass spectrometry now allows the reliable quantification of a selected set of approximately 50 proteins across a broad abundance range and a large number of samples (Picotti et al. 2009).
As a result of the ERCC effort, a standard set of approximately 96 well-characterized, external RNA controls will be available.
After separating the sample cohort into a training set of approximately 1,000 samples and a similarly sized validation data set, which contained those profiles of lower cellularity or with missing matching normal sample data, the investigators performed integrated analysis of DNA copy number and transcript levels in order to identify target genes of DNA copy number alterations.
