The phrase "assayed at the end" is correct and usable in written English.
It can be used in contexts where you are discussing the evaluation or analysis of something that occurs at the conclusion of a process or event.
Example: "The results of the experiment were assayed at the end to determine their effectiveness."
Alternatives: "evaluated at the conclusion" or "analyzed at the finish".
Aliquots were then rapidly cooled in an ice bath and the activities assayed at the end of the timecourse.
Insulin, ghrelin, glucose-dependent insulinotropic polypeptide (GIP) and Glucagon-like peptide-1 (GLP-1) levels were assayed at the end of the study.
Expression levels of ghrelin were then assayed at the end of 16 h after IR by means of immunoblotting and immunohistochemistry.
Serum samples were collected from patients and controls, aliquoted into separate vials, stored at −70°C, and assayed at the end of the study, in order to avoid interassay variability.
All blood samples, collected from patients and controls, were aliquoted into separate vials, stored at −20°C, and assayed at the end of the study, in order to avoid interassay variability.
Reaction vessels containing only the virus and buffer without chlorine served as controls for determination of virus titers in the absence of chlorine and were assayed at the end of the longest exposure time period (60 s).
For cell viability/death assays, at the end of each treatment, triplicate cell samples were stained with 0.05% trypan blue and cells excluding/including the dye were quantitated visually at the microscope (four fields per sample).
Lysates of the cells used for the invasion assays at the beginning and end of the experiment were taken for western blot analysis to ascertain the efficiency of the siRNA transfection in each case.
Cells were seeded on PCL film in 24-well plate at a density of 2 × 10 cells and vitality was assayed at specific end points (2, 4, 7, 10, 13, and 16 days).
Conditioned media were retained for hormone assays, and at the end of culture either viable cell number was determined (dose response experiment) by neutral red uptake assay [ 17] or cell lysates were prepared (microarray experiment) using the lysis buffer component of the RiboPure RNA isolation kit (Ambion/ Life Technologies Ltd., Paisley, UK).
Hormone assays performed at the end of the study revealed that a considerable portion of the healthy elderly men in our sample met criteria for hypogonadism and suggests that their low hormone levels may have mitigated against discovering other significant hormone cognition relationships.
