There are multiple definitions:

1. maximaal toelaatbaar risiconiveau(Dutch)

   • concentratie van een stof in water, sediment, bodem of lucht waar beneden geen negatief effect is te verwachten
   • RIVM
   • Environment, Pollution and health, Safety and health
   • https://www.inf… meer afgeleid.

2. methionine synthase (reductase)(English)

   • enzyme that catalyzes the final step in methionine biosynthesis
   • NCD, SNP, SNV, VDR
   • Enzymes
   • https://www.gen…isp.pl?gene=MTR

3. magnetization transfer ratio(English)

   • with MDA, these ratio-based histograms of brain tissue may provide diagnostic information for individual patients in the clinical context of SLE
   • SLE, MDA
   • Neuropathy, Psychiatry, Medical imaging
   • https://doi.org…diol.2223010413