Nor-

In chemical nomenclature, nor- is a prefix to name a structural analog that can be derived from a parent compound by the removal of one carbon atom along with the accompanying hydrogen atoms. The nor-compound can be derived by removal of a CH
3, CH
2, or CH group, or of a C atom. The "nor-" prefix also includes the elimination of a methylene bridge in a cyclic parent compound, followed by ring contraction. (The prefix "homo-" which indicates the next higher member in a homologous series, is usually limited to noncyclic carbons).

"Nor" is an abbreviation of normal. Originally, the term was used to denote the completely demethylated form of the parent compound. Later, the meaning was restricted to the removal of one group. Nor is written directly in front of the stem name, without a hyphen between, unless there is another prefix after nor (for example α-). If multiple groups are eliminated the prefix dinor, trinor, tetranor, etcetera is used. The prefix is preceded by the position number (locant) of the carbon atoms that disappear. For example 2,3-dinor. The original numbering of the parent compound is retained. According to IUPAC nomenclature, this prefix is not written with italic letters and unlike nor, when it is a di or higher nor, at the end of the numbers separated by commas, a hyphen is used. As for example 2,3-dinor-6-keto Prostaglandin F1α is produced by beta oxidation of the parent compound 6-keto Prostaglandin F1α. Here, though actually carbon 1 & 2 are lost by oxidation. The new Carbon 1 has now become a CCOH similar to the parent compound, looking as if just carbon 2 & 3 have been removed from the parent compound. "Dinor" does not have to be reduction in adjacent carbons e.g. 5-Acetyl-4,18-dinor-retinoic acid, where 4 referred to a ring carbon and 18 referred to a methyl group on the 5th carbon on the ring.

Nor

Nor may refer to:

Nør may refer to:

NOR may stand for:

 Norway, official country code

List of Wicked characters

This is a list of characters that appear in Gregory Maguire’s Wicked Series

Protagonists

Elphaba "Elphie" Thropp

Monument

A monument is a type of structure that was explicitly created to commemorate a person or important event, or which has become important to a social group as a part of their remembrance of historic times or cultural heritage, or as an example of historic architecture. The term 'monument' is often applied to buildings or structures that are considered examples of important architectural and/or cultural heritage.

Etymology

The origin of the word "monument" comes from the Latin moneo, monere, which means 'to remind', 'to advise' or 'to warn', suggesting a monument allows us to see the past thus helping us visualize what is to come in the future. In English the word "monumental" is often used in reference to something of extraordinary size and power, as in monumental sculpture, but also to mean simply anything made to commemorate the dead, as a funerary monument or other example of funerary art.

Creation and functions

Monuments have been created for thousands of years, and they are often the most durable and famous symbols of ancient civilizations. Prehistoric tumuli, dolmens, and similar structures have been created in a large number of prehistoric cultures across the world, and the many forms of monumental tombs of the more wealthy and powerful members of a society are often the source of much of our information and art from those cultures. As societies became organized on a larger scale, so monuments so large as to be difficult to destroy like the Egyptian Pyramids, the Greek Parthenon, the Great Wall of China, Indian Taj Mahal or the Moai of Easter Island have become symbols of their civilizations. In more recent times, monumental structures such as the Statue of Liberty and Eiffel Tower have become iconic emblems of modern nation-states. The term monumentality relates to the symbolic status and physical presence of a monument.

Monuments (album)

Monuments is a 1998 progressive trance album by Los Angeles-based DJ Doran.

Track listing

References

External links

Historical editions (music)

Historical editions form part of a category of printed music, which generally consists of classical music and opera from a past repertory, where the term can apply to several different types of published music. However, it is principally applied to one of three types of music of this sort:

The origins of historical editions