Researchers with the Department of Civil and Environmental Engineering at Stanford University published “Temporal Stability of the Microbial Community in Sewage-Polluted Seawater Exposed to Natural Sunlight Cycles and Marine Microbiota” in the March 2015 issue of Applied and Environmental Microbiology. The scientists used Spectra/Por® 1 dialysis tubing to exchange particles in a seawater bath.

Scientists are presented with the conundrum of run off pollution finding its way into the ocean, and the need to effectively test seawater without disturbing microorganism. The Stanford researchers’ paper “investigate[s] the effect of environmental stressors on the entire sewage microbial community over time”.

Abstract: Billions of gallons of untreated wastewater enter the coastal ocean each year. Once sewage microorganisms are in the marine environment, they are exposed to environmental stressors, such as sunlight and predation. Previous research has investigated the fate of individual sewage microorganisms in seawater but not the entire sewage microbial community. Click here to read the article.


Using resealable closures is the preferred method for sealing dialysis tubing without the risk of leaking. Tied knots are nearly impossible to open & re-seal and often result in damaged, leaking membranes. Spectrum offers two classes of Dialysis Tubing Closures, Universal Closures for use with all membrane types and specialized Spectra/Por Closures with additional functional benefits for use only with Standard Grade tubing.