CIS
Cis
Cis is a
Latin noun or prefix, meaning "on the same side [of]" or "on this side [of]". It is
the opposite of
trans, which means "on the opposite side". In
chemistry, a
double bond (or
ring) in which the greater radical on both ends is on the same side of the bond (or face of the ring) is called cis. Compare with
trans. In the diagram on the right, both
hydrogen atoms (and both
fluorine atoms) are on the same side of the carbon chain. As the
carbons are joined by a double bond, these cannot rotate around the molecule. See
Geometric isomerism.In
genetics, cis- is a prefix used in terms such as "cis-regulation" to signify the co-location of two or more
genes on the same
chromosome of a
homologous pair. The action of molecules is also described in these terms (see
Cis-acting).In
molecular and
cellular biology, Internal factors act in cis (i.e.,
intramolecular). For example, a specific promoter sequence which recruits
RNA polymerase and thereby increases the rate of RNA transcription acts in cis. External factors which act on a molecule (i.e.,
intermolecular interactions) are considered to act in trans. For example, proteins which are
transcription factors bind to the DNA in trans to modify the rate of RNA transcription. In
geography,
placenames beginning with Cis- convey the meaning "on this side of". Examples include
Ciskei (referring to the
Kei River),
Cisleithania (
Leitha),
Cisalpine Gaul (
Alps),
Cisjordan (used for the
British Mandate of Palestine, the
West Bank and
Israel interchangeably). The antonym is
Trans-.In
astronomy cislunar means: in
outer space between the
Earth and the
Moon. Translunar is its
antonym. Similarly, a
Trans-Neptunian object is a celestial object orbiting the
Sun outside the orbit of
Neptune, and Cis-Neptunian objects are at or before Neptune's orbit.In
medicine and sociology,
cisgender and cissexual are the opposite of
transgender and
transsexual, respectively. Both describe people whose
gender identity matches their
physical and/or
assigned sex.In
nutrition a
cis fat is an unsaturated fatty acid whose hydrogen atoms are on the same side, as opposed to an unsaturated
trans fat whose hydrogen atoms are on opposite sides. The difference in shape makes cis fats less likely to congest in the bloodstream and thus less dangerous than trans fats.
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CIS
Cette page d’ répertorie les différents sujets et articles partageant un même nom. CIS peut faire référence à :Commonwealth of Independent States, traduit en français par
Communauté des États indépendants (CEI),
Canton (Kiribati), selon la liste des codes AITA des aéroports,Cuivre-Indium-Sélénium, un type de cellules photovoltaïques, (CuInSe2),
Conseil International de Surveillance, une autorité de
Stargate SG-1,
CompuServe,
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Cis
Communauté des États indépendants
La Communauté des États indépendants (CEI) (en russe : Содружество Независимых Государств (СНГ), prononcé Sodroujestvo Nezavissimykh Gossoudarstv) est une entité intergouvernementale composée de 12 anciennes républiques soviétiques. Conformément à ses instruments constitutifs, les accords de Minsk et d'Alma-Ata, la CEI est dépourvue de personnalité juridique internationale. Pour cette raison, la collectivité des anciennes républiques soviétiques n'est pas une organisation internationale.
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Cis
Cis bezeichnet:in der Musik das um einen Halbton erhöhte C als Grundton der
Cis-Dur-Tonleiterin der Informatik inoffiziell die Programmiersprache
C-Sharp (deren Name sich auf den Ton bezieht)cis (diesseits, im Gegensatz zu trans) bezeichnet:geografische Angaben wie z. B.
Cisjordanien,
Cisleithanienin der Stereochemie eine bestimmte Anordnung von zwei Substituenten, siehe
Cis-trans-Isomeriecis bezeichnet:in der Musik den über Cis gebildeten Akkord der Tonart
cis-Mollin der
Mathematik vereinfachende Schreibweise:
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Cis
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CIS