Term 1 | AND | Term 2 | |
---|---|---|---|
perfluor* | ((trend OR variation) NEAR (time OR temporal)) | ||
OR | polyfluor* | OR | ((change OR increase OR decrease) NEAR/5 (level or concentration)) |
OR | fluorotelomer* | OR | “time series” |
OR | PF?S | OR | ((snow OR ice OR sediment) NEAR (core OR column OR cap)) |
OR | PF?A | OR | archive* |
OR | PFC | OR | “specimen bank” |
OR | PFT | OR | “long-term monitoring” |
OR | PFHxS | OR | ”repeated measurements” |
OR | FOSE | OR | historic* |
OR | FOSA | ||
OR | PAPS |