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This glossary of chemistry terms is a list of terms and definitions relevant to chemistry, including chemical laws, diagrams and formulae, laboratory tools, glassware, and equipment. Chemistry is a physical science concerned with the composition, structure, and properties of matter , as well as the changes it undergoes during chemical reactions ...
The first two protein structures solved by molecular graphics without the aid of the Richards' Box were built with Stan Swanson's program FIT on the Vector General graphics display in the laboratory of Edgar Meyer at Texas A&M University: First Marge Legg in Al Cotton's lab at A&M solved a second, higher-resolution structure of staph. nuclease ...
An example of a Levey–Jennings chart with upper and lower limits of one and two times the standard deviation. A Levey–Jennings chart is a graph that quality control data is plotted on to give a visual indication whether a laboratory test is working well.
In chemical analysis, matrix refers to the components of a sample other than the analyte [1] of interest. The matrix can have a considerable effect on the way the analysis is conducted and the quality of the results are obtained; such effects are called matrix effects. [2]
The modern double entry system was likely a direct precursor of the first European adaptation many centuries later. [4] The first known use of the terms "debit" and "credit" occurred in the Venetian Luca Pacioli's 1494 work, Summa de Arithmetica, Geometria, Proportioni et Proportionalita (A Summary of Arithmetic, Geometry, Proportions and Proportionality).
Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed. Technical drawing is essential for communicating ideas in industry and engineering .
The terms equity [for profit enterprise] or net assets [not-for-profit enterprise] represent the residual interest in the assets of an entity that remains after deducting its liabilities (CF E61). Equity accounts include common stock, paid-in capital, and retained earnings. Equity accounts can vary depending where an entity is domiciled as some ...
Normal Balances refer to whether the balance for an account in a properly-formed trial balance is usually a debt or a credit. A normal balance also reflects the accounting equation. If a trial balance for an account is reversed, such an account is called a "contra-account" (e.g. accumulated depreciation as an asset or owners drawings as equity ...