Beryllium difluoride; beryllium oxide; high temperatures; mass spectrometry; reaction enthalpy; sublimation enthalpy
Mass spectrometric studies were made at high temperatures of the vapors over BeF2(s) and BeO(s) individually and of their mixture. The sublimation enthalpy, ?H0 = 55.56 0.43 kcal/mol, where 1 kcal equals 4184 J, was obtained for BeF2 by the use of...
Demineralization of tooth mineral in the caries process was studied using a computer model that simulates a diffusion controlled dissolution process. The model consists of a two-compartment system. An acidic solution in the outer ("plaque")...
A member of the National Bureau of Standards (NBS) Electricity Division in the Vacuum Tube Testing Lab in February 1919. The NBS developed tests to accurately determine the expected performance of a tube based on its characteristics. These types of...
Borda count method; measurement needs; median method; nano-electrotechnologies; priorities; rankings; standards; statistical significance; United States Measurement System.
In 2006, the National Institute of Standards and Technology conducted an assessment of the U.S. measurement system (USMS), which encompasses all private and public organizations that develop, supply, use, or ensure the validity of measurement...