The mixture was then allowed to settle for 30 min to obtain phase splitting and settling, samples of the upper layer, the raffinate were withdrawn and analyzed by ICP-AES.
Measurements were performed on 2 drops of a suspension of sputum cells (10 cells/mL) introduced into a quartz cuvette containing stirred water for IS samples and water with glycerol (1 1) for the WTC settled dust sample collected 7 days postcollapse on Cortlandt Street, one block east of the WTC.
Most Children's Centers conducted repeated measures of environmental exposures, including inspection, settled dust sampling, and air sampling; completion rates for these evaluations ranged from 73 to 91%.
After mixing the phases, 1 vol of buffer was added and vortexed, and once the aqueous phase settled, a sample was taken to measure the recovered β-glucosidase activity.
In most cases, settled dust samples were collected and were assayed for indoor allergens; concentrations of endotoxin and pesticides were also measured.
URECA staff collect settled dust samples from the children's homes using a Mitest Dust Collector (Indoor Biotechnologies, Inc., Charlottesville, VA) and a vacuum cleaner (Oreck Super-Deluxe Compact Canister, Model BB870AD, New Orleans, LA).
Total retained cells were further divided into strongly and weakly attached fractions by settling a sample of the porous medium through groundwater to dislodge loosely adhering cells.
Multistage population mental health surveys were conducted in three groups: 1) a Vietnamese-immigrant sample settled in Australia (n = 1161); 2) a Vietnamese source country sample residing in the Mekong Delta region (n = 3039); 3) an Australian-born host country sample (n = 7964).
In the range of low cell numbers, the PCR reaction of two macrophyte samples in which no Ostreopsis cells were found using the volume sample settled for the microscopy, resulted in a positive detection (no. 21) and quantification of 7 cells g−1 fw (no. 12).
