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The R/S system is an important nomenclature system for denoting enantiomers. This approach labels each chiral center R or S according to a system by which its substituents are each assigned a priority , according to the Cahn–Ingold–Prelog priority rules (CIP), based on atomic number.
E–Z configuration, or the E–Z convention, is the IUPAC preferred method of describing the absolute stereochemistry of double bonds in organic chemistry. It is an extension of cis – trans isomer notation (which only describes relative stereochemistry ) that can be used to describe double bonds having two, three or four substituents .
For example, 3-methyl-1-pentene with a rectus assignment is formatted as (R)-3-methyl-1-pentene. [12] An example of a (s) descriptor: (1R,2s,3S)-1,2,3-trichlorocyclopentane. A practical method of determining whether an enantiomer is R or S is by using the right-hand rule: one wraps the molecule with the fingers in the direction 1 → 2 → 3.
Two wires twisted around each other, possibly covered with an overall sheath; this configuration rejects some kinds of interference. two-phase electric power An electric power system using two sets of alternating currents, displaced in time by a quarter period. two-port network A network that has two places to exchange energy with its surroundings.
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Software configuration management (SCM), a.k.a. software change and configuration management (SCCM), [1] is the software engineering practice of tracking and controlling changes to a software system; part of the larger cross-disciplinary field of configuration management (CM). [2]
A configuration is a set containing the positions of all particles of the body. strain hardening strength of materials stress 1. An applied force or system of forces that tends to strain or deform a physical body. 2. A measure of the internal forces acting within a deformable body. 3.
CM—Configuration management; CM—Content management; CMDB—Configuration management database; CMMI—Capability Maturity Model Integration; CMOS—Complementary metal–oxide–semiconductor; CMS—Content management system; CN—Canonical Name; CN—Common Name; CNC—Computerized numerical control; CNG—Cryptographic Next Generation