Limit of detection (LOD) and limit of quantification (LOQ) Limit of detection (LOD) is the lowest amount or concentration of an analyte (substance being measured) that can be detected with reasonable certainty by the analytical method
Even trickier: Because the underarm folds onto itself, its constantly being rubbed and exposed to friction, which contributes to darkening
Pan T, Wang N, et,al
Likewise, in addition to the mentioned Parkinsons disease models [198,199,200], these were induced by various central causes (e.g., spinal cord compression [170,230], stroke [145], traumatic brain injury [231], neurotoxin cuprizone that mimics multiple sclerosis in rats [232], neuroleptics [199,200], amphetamine [200,233], alcohol acute and chronic intoxication [234], serotonin syndrome [235], and NO-system blockade [200])
doi:10.1152/japplphysiol.91004.2008, PMID: 18845776 Soejima Y, Ostrowski RP, Manaenko A, Fujii M, Tang J, Zhang JH (2012) Hyperbaric oxygen preconditioning attenuates hyperglycemia enhanced hemorrhagic transformation after transient MCAO in rats