Natalie L Zusman, Danielle F Peterson, Michelle M Lawson, Natasha S McKibben, David M Gallacher, Darin M Friess, Zachary M Working
Radiographic bladder shift is a harbinger of intraoperative blood loss in acetabular surgical fixation
European journal of orthopaedic surgery & traumatology : orthopedie traumatologie
pmmov widely used normalize concentration severe acute respiratory syndrome coronavirus 2 sarscov2 rna influenza respiratory syncytial virus rsv account variations fecal content wastewater pmmov also used internal rna recovery control wastewaterbased epidemiology wbe tests potentially useful interpretation wbe data previous studies suggested pmmov concentration affected various physicochemical characteristics wastewater also possibility laboratory methods particularly variability centrifugation steps remove supernatant pellets cause pmmov variability goal study improve understanding main drivers pmmov variability assessing relationship pmmov concentration physicochemical characteristics wastewater methodological approach concentrating wastewater samples analyzed 24hour composite wastewater samples collected influent stream three wastewater treatment plants wwtps located city toronto ontario canada samples collected 3 5 times per week starting beginning march 2021 midjuly 2023 influent flow rate used partition data wet dry weather conditions physicochemical characteristics eg total suspended solids tss biological oxygen demand bod alkalinity electrical conductivity ec ammonia nh3 raw wastewater measured pmmov quantified spatial temporal variability pmmov observed throughout study period pmmov concentration significantly higher dry weather conditions multiple linear regression analysis demonstrates number type physicochemical parameters drive pmmov variability sitespecific overall bod alkalinity important predictors differences pmmov concentration single wwtp two different laboratory methods along weak correlation pellet mass tss using one method may indicate differences sample concentration subjective subsampling bias could alter viral recovery introduce variability data