The phrase "a representative portion of each" is correct and usable in written English.
It can be used when discussing a sample or selection that accurately reflects the characteristics of a larger group or set.
Example: "In our study, we collected a representative portion of each demographic group to ensure our findings were comprehensive."
Alternatives: "a typical sample of each" or "an indicative segment of each".
Briefly, DNA was extracted from five 5- μm paraffin sections, containing a representative portion of each tumour block, using QIAamp DNA Mini kits (Qiagen, Hilden, Germany).
At Purdue University, total RNA was extracted from a representative portion of each sample using TRIzol® reagent (Invitrogen) according to manufacturer instructions.
DNA was extracted from five 10-μm-thick formalin-fixed paraffin embedded sections containing a representative portion of each tumor block, using the QIAamp DNA Mini kit (Qiagen, Hilden, Germany).
DNA was extracted from five 10-μm thick formalin fixed paraffin embedded (FFPE) sections containing a representative portion of each tumor block, using the QIAamp DNA Mini kit (Qiagen, Hilden, Germany).
The intensity of labeling in the synovial membrane or a representative portion of cartilage in each image was analyzed by using the IHC quantification technique validated by Pham et al. [ 28].
Each excised lesion was subdivided using aseptic technique and a representative portion of the lesion was processed for histopathology by ELB.
One aim of Marine Protected Areas (MPAs) is to protect a representative portion of the environment through spatial closures to extractive practices such as fisheries.
BioCLUST offers an alternative to other biomass mapping methods when scene-specific plot data are limited and a photo-inventory is available for a representative portion of a Landsat scene.
When choosing a specific instrument, investigators must consider some important caveats: different classes of dust generators characterize different properties (complete collection of a small puff of aerosol versus sampling of a representative portion of a large aerosol cloud) and physical processes (resuspension of deposited dust versus in situ production of dust).
