The filtered medium (0.2 μm; Whatman) was concentrated using Amicon Ultra-4 centrifugal concentration filter tubes (Millipore) with a 10 kDa MW (molecular mass) cut-off.
Based on the results of a model sensitivity analysis, several variables were determined to be important in the clogging phenomena observed in ISFs, including hydraulic loading rate, influent chemical oxygen demand (COD) concentration, filter dosing frequency, and time of operation.
To count bacterial abundance, duplicate 2 mL samples were fixed with 100 μl of formaldehyde (2 % final concentration), filtered onto 0.2 μm black polycarbonate filters (Whatman), then immediately stained with DAPI (100 μg mL−1) for 15 min at 4 °C in dark (AQSIQ 2007).
To determine the IL-23 concentration, filtered supernatants were diluted 1∶4 in diluent contained in the human IL-23 (p19/p40) ELISA kit (eBioscience), and assays were performed according to the manufacturer's specifications.
Using the safety nozzle during the pour resulted in significant reductions in glutaraldehyde vapor concentrations (filter cassettes=0.014 ppm; passive badges=0.027 ppm; meter=0.021 ppm).
This field study has shown bioretention basin pollution removal performance to be highly variable and dependant on a range of factors including inflow pollution concentrations, filter media, construction methods and environmental factors.
While JAM-A could be detected in all serum samples, JAM-A in cell culture supernatants could consistently be detected only after protein concentration by filter centrifugation, using Amicon Ultra-15 Ultracel-10k filter devices (Millipore Corporation, Tullagreen, Ireland).
We have also studied the influence of various parameters such as air velocity, particle size, aerosol concentration and filter main characteristics.
The 7-d mortality was 100% after a 24 h exposure to 7.5 g/m2 concentration of filter cake and 10 g/m2 of both powders.
PM2.5 mass concentration (by filter weighing), trace element concentrations (by X-ray fluorescence technique), and black carbon measurements (using the reflectance technique) were conducted at the NYU Nelson Institute of Environmental Medicine laboratory (Tuxedo, NY).
Of note, minimally manipulated SP alone exhibited antiviral activity at every tested concentration, while filtered SP+(Ab) and filtered SP+(Ab) containing SEVI both exhibited HIV-1 enhancing activity.
