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Also in 2016, Quizlet launched "Quizlet Live", a real-time online matching game where teams compete to answer all 12 questions correctly without an incorrect answer along the way. [15] In 2017, Quizlet created a premium offering called "Quizlet Go" (later renamed "Quizlet Plus"), with additional features available for paid subscribers.
The National Registry of Certified Chemists (NRCC) is an American certification agency for chemistry professionals founded in 1967. [1] In 1999, the organization name changed from National Registry in Clinical Chemistry to National Registry of Certified Chemists to reflect the broader scope of chemists. [1]
API gravity values of most petroleum liquids fall between 10 and 70 degrees. In 1916, the U.S. National Bureau of Standards accepted the Baumé scale , which had been developed in France in 1768, as the U.S. standard for measuring the specific gravity of liquids less dense than water .
The American Petroleum Institute (API) is the largest U.S. trade association for the oil and natural gas industry. It claims to represent nearly 600 corporations involved in production , refinement , distribution , and many other aspects of the petroleum industry .
The American Board of Clinical Chemistry (ABCC) is an American doctoral board certification agency for clinical chemistry, toxicological chemistry, and molecular diagnostics. It was founded in 1950 with sponsorship from the American Chemical Society (ACS), American Institute of Chemists (AIC), and the American Society of Biological Chemists . [ 1 ]
The analytical profile index (API) was invented in the 1970s in the United States by Pierre Janin of Analytab Products Inc. [2] The API test system is currently manufactured by bioMérieux. [3] The API range introduced a standardized and miniaturized version of existing techniques, which were considered complicated to perform and difficult to read.
The process chemistry group at Boehringer Ingelheim, for example, targets a VTO of less than 1 for any given synthetic step or chemical process. Additionally, the raw conversion cost of an API synthesis (in dollars per batch) can be calculated from the VTO, given the operating cost and usable capacity of a particular reactor.
General chemistry (sometimes referred to as "gen chem") is offered by colleges and universities as an introductory level chemistry course usually taken by students during their first year. [1] The course is usually run with a concurrent lab section that gives students an opportunity to experience a laboratory environment and carry out ...