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If there are multiple chiral carbons, e.g. (1R,4S), a number specifies the location of the carbon preceding each configuration. [12] The R/S system also has no fixed relation to the D/L system. For example, the side-chain one of serine contains a hydroxyl group, −OH.
More generally, for any pair of enantiomers, all of the descriptors are opposite: (R,R) and (S,S) are enantiomers, as are (R,S) and (S,R). Diastereomers have at least one descriptor in common; for example (R,S) and (R,R) are diastereomers, as are (S,R) and (S,S). This holds true also for compounds having more than two stereocenters: if two ...
the development of Mathematics provides a tightly connected network of formal rules, concepts, and systems. Nodes of this network are closely bound to procedures useful in human activities and to questions arising in science. The transition from activities to the formal Mathematical systems is guided by a variety of general insights and ideas.
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]
The "Mini Blu-ray Disc" (also, "Mini-BD" and "Mini Blu-ray") is a compact 8-centimetre-diameter (3.1 in) variant of the Blu-ray Disc that can store 7.8 GB of data in its single-layer configuration, or 15.6 GB on a dual-layer disc. [140] It is similar in concept to the MiniDVD and Mini CD. Recordable (BD-R) and rewritable (BD-RE) versions of ...
Java or other JVM languages, such as Kotlin, may be combined with C/C++, [112] together with a choice of non-default runtimes that allow better C++ support. [113] The SDK includes a comprehensive set of development tools, [114] including a debugger, software libraries, a handset emulator based on QEMU, documentation, sample code, and tutorials.
Richard Kleindienst (R) Attorney General that replaced Mitchell, was convicted of "refusing to answer questions" given one month in jail. [202] Jeb Stuart Magruder (R) Head of Committee to Re-elect the President, pleaded guilty to one count of conspiracy, August 1973 [203]
David Parlett's Oxford History of Board Games (1999) defines four primary categories: race games (where the goal is to be the first to move all one's pieces to the final destination), space games (in which the object is to arrange the pieces into some special configuration), chase games (asymmetrical games, where players start the game with ...