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KAT [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-03-16

English

Subject field(s)
  • Drugs and Drug Addiction
DEF

The buds or fresh leaves of Catha edulis, which are chewed or drunk as tea in East Africa and the Arabian peninsula (Yemen). It is a central nervous system stimulant very similar in chemical structure and effects to amphetamines.

French

Domaine(s)
  • Drogues et toxicomanie
DEF

Substance hallucinogène appartenant au groupe des phényléthylamines extraite des feuilles d'une célastracée (Catha edulis), arbuste d'Abyssinie et du Yémen.

OBS

[...] on mâche longuement les feuilles de cet arbuste pour s'enivrer.

Spanish

Campo(s) temático(s)
  • Drogas y toxicomanía
OBS

Estimulante vegetal que se masca, parecido al tabaco, usado tradicionalmente en Yemen y otros países árabes vecinos. [...] sus principios activos son los alcaloides psicotrópicos catina y catinona. Ambas son moléculas psicoestimulantes, derivadas de la fenetilamina, y emparentadas químicas y funcionalmente con las anfetaminas.

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Record 2 2011-08-09

English

Subject field(s)
  • Biological Sciences
DEF

Amount of enzyme that catalyzes the reaction of 1 mol of substrate or coenzyme per second under specified conditions (temperature, pH, and substrate concentration) of an assay method.

CONT

The katal ... is in accord with the dimensions of rate constants in chemical kinetics, which are based on the second rather than the minute. Activities can also be given in microkatals [(mu]kat), nanokatals (nkat), or picokatals (pkat). One old enzyme unit is thus equal to 1/60 [mu]kat or 16.67 nkat. In the new convention specific activity is given as katals per kilogram of protein, equivalent to microkatals per milligram of protein, and the molar activity as katals per mole of enzyme.

OBS

Abbreviation: Kat.

French

Domaine(s)
  • Sciences biologiques
DEF

Quantité d'enzyme qui catalyse la transformation d'une mole de substrat par seconde sous des conditions expérimentales standards.

CONT

L'unité de temps officielle étant la seconde et celle de la concentration la molécule gramme par litre (ou M), la Commission des Enzymes a proposé une nouvelle unité d'activité enzymatique, le katal qui remplacera l'unité internationale U.I.

OBS

Kat est une abréviation de katal.

Spanish

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