levorotation

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levorotation

[¦lē·və·rō′tā·shən]
(optics)
Rotation of the plane of polarization of plane polarized light in a counterclockwise direction, as seen by an observer facing in the direction of light propagation. Also known as levulorotation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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(4,5) Because 2 isolated from the insect was levorotatory, its absolute configuration was unambiguously assigned as R.
The levorotatory isomer is the more active releaser of nor-epinephrine and dopamine in the central nervous system, and currently levopropylhexedrine is in fact synthesized from dextromethamphetamine (Wilson et al.
(4) Familiarity and use of liothyronine (the exogenous levorotatory form of T3) augmentation may improve response rates for depressed patients taking antidepressants.
(154) Once separated, it was determined that the dextrorotatory enantiomer imparted all of the beneficial antiplatelet activity, while the levorotatory enantiomer imparted all of the neurotoxicity of the racemate.
In addition, enantiomers can be categorised by their ability to rotate polarised light in a clockwise or counterclockwise manner--designated as '+' (also known as dextrorotatory) or '-'(levorotatory).
Bupivacaine or its levorotatory isomer levobupivacaine, were the local analgesic (LA) agents used in all five cases.
Levosimendan, the levorotatory form, was shown to exert a positive inotropic effect in isolated cardiac preparations (41), with greater potency than the dextrorotatory isomer, dextrosimendan (42).