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periodic table of the elements. Also simply called the periodic table. A tabular display of the chemical elements organised on the basis of their atomic numbers, electron configurations, and recurring chemical properties. Elements are presented in order of increasing atomic number (number of protons). phase (matter) phase (waves) phase equilibrium
X-ray notation is a method of labeling atomic orbitals that grew out of X-ray science. Also known as IUPAC notation, it was adopted by the International Union of Pure and Applied Chemistry in 1991 as a simplification of the older Siegbahn notation. [1] In X-ray notation, every principal quantum number is given a letter associated with it.
This list contains acronyms, initialisms, and pseudo-blends that begin with the letter D. For the purposes of this list: acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome , pronounced to rhyme with cars
Greek στενός (stenós), narrow, short; + -σῐς (-sis), added to verb stems to form abstract nouns or nouns of action, result or process restenosis, stenosis: steth-of or pertaining to the upper chest, the area above the breast and under the neck Greek στῆθος (stêthos), chest, cuirass: stethoscope: stheno-strength, force, power
118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
D/T: due to DTA: descending thoracic aorta: DTaP: diphtheria–tetanus–acellular pertussis (combined vaccination) DTP: diphtheria-tetanus-pertussis (combined vaccination) DTR: deep tendon reflex: DTs: delirium tremens: DU: duodenal ulcer (see peptic ulcer) DUB: dysfunctional uterine bleeding: DVT: deep vein thrombosis: D/W: discussed with DW ...
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where x 0 is an initial point on the line and θ is a unit vector in R n giving the direction of the line L. The latter integral is not regarded in the oriented sense: it is the integral with respect to the 1-dimensional Lebesgue measure on the Euclidean line L. The X-ray transform satisfies an ultrahyperbolic wave equation called John's equation.