The recording montages used during MEG and EEG experiments are standardized across subjects and measure the summed activity of large populations of neurons.
Typically, a heat flow calorimeter is operated isothermally and measures the sum heat released or consumed by a sample material inside of a calorimetric measuring cell.
This assay used unfractionated extracts and measured the sum of all PanK isoforms.
We used Nikon Elements ROI statistics and measured the Sum Intensity of ROI through each projection.
Of the several scores possible for this task, we used time allocation: for each primary task we assumed an optimal allocation of 3 min, and measured the summed total deviation (in seconds) from this optimum.
So what you can do is draw a big triangle in space and try to measure the sum of angles.
For evaluation of keratan sulfate, we digested rat serum with Keratanase II and then measured the sum of monosulfate and disulfate disaccharides derived from keratan sulfate by HPLC.
No matter how many times the big-time college-sport triangle is measured and re-measured, the sum of its interior angles is clearly not 180°.
FFM is defined as bodyweight minus body-fat weight and thus primarily measures the sum of the masses of muscle, bone, and organs.
We measured the sum of plasma nitrite and nitrate by reducing nitrate to nitrite via nitrate reductase (Roche Diagnostics Corporation, Indianapolis, IN).
