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The log-spectral distance (LSD), also referred to as log-spectral distortion or root mean square log-spectral distance, is a distance measure between two spectra. [1] The log-spectral distance between spectra () and ^ is defined as p-norm:
In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1]
Descarboxylysergic acid, or 8-descarboxylysergic acid, also known as 9,10-didehydro-6-methylergoline or as 6-methyl-9-ergolene, is a drug of the ergoline family related to lysergic acid and lysergamides like lysergic acid diethylamide (LSD).
LSD is a biased agonist that induces a conformation in serotonin receptors that preferentially recruits β-arrestin over activating G proteins. [125] LSD also has an exceptionally long residence time when bound to serotonin receptors lasting hours, consistent with the long-lasting effects of LSD despite its relatively rapid clearance. [125]
Limit State Design (LSD), also known as Load And Resistance Factor Design (LRFD), refers to a design method used in structural engineering. A limit state is a condition of a structure beyond which it no longer fulfills the relevant design criteria. [ 1 ]
1H-LSD (N1-hexanoyl-lysergic acid diethylamide, SYN-L-027) [1] is an acylated derivative of lysergic acid diethylamide (LSD), with a six carbon hexanoyl chain attached to the N1 position.
Long slow distance (LSD) is a form of aerobic endurance training used in sports including running, [1] rowing, [2] skiing [3] and cycling. [ 4 ] [ 5 ] It is also known as aerobic endurance training, base training and Zone 2 training. [ 6 ]
ZF LSD – clutch stack visible on left ZF LSD – spider pinion shaft ramps visible. Torque sensing LSDs respond to driveshaft torque, so that the more driveshaft input torque present, the harder the clutches, cones or gears are pressed together, and thus the more closely the drive wheels are coupled to each other.