To evaluate the purity of nucleic acid and protein samples, molecular scientists frequently compare the recorded spectrophotometric absorbance of a sample at 260 nm to the value measured at 280 nm.

The concept of noise power ratio (NPR) has been around since the early days of frequency division multiplexed (FDM) telephone systems. The NPR is simply a measure of the “quietness” of an unused ...

Back in the 1980s, Pacific Bearing Co. (PBC) invented and commercialized plain bearings, which were sized to be interchangeable with linear ball bearings. Plain bearings worked very well in certain ...