Björn Helm

TL;DR: In this article, the authors assess spatial and temporal trends of population-normalized mass loads of benzoylecgonine, amphetamine, methamphetamine and 3,4-methylenedioxymethamphetamine (MDMA) in raw wastewater over 7 years (2011-17), and address overall drug use by estimating the average number of combined doses consumed per day in each city.

TL;DR: In this article, the authors reviewed the commonly used water quality monitoring (WQM) design methods and their resulting monitoring setups, and found that multivariate statistical analysis is the most frequently used method for designing WQM networks in rivers.

TL;DR: In this article, the authors used reverse transcription quantitative PCR (E- and S-gene) and droplet digital PCR to detect SARS-CoV-2 positive clinical material and enriched the virus by polyethylene glycol precipitation and ultrafiltration with Vivaspin 10 kDa MWCO columns.

TL;DR: Results indicate that node flooding events in networks with higher Meshness values are less likely to occur, and have shorter durations and smaller volumes than in predominantly branched systems, and Predominantly meshed systems are identified then as more reliable in terms of flooded nodes and flooding volumes.

TL;DR: In this paper, the authors provided an analysis of current challenges with respect to transboundary water resources management in Eastern Europe, based on a comparison of similarities and disparities concerning the physical and human geography of the basins and their national sub-basins as well as specific problems related to water pollution caused by urban, agricultural and industrial water usage both in the recent past and today.