Measuring mixed cellulose ester (MCE) filter mass under variable humidity conditions.

Interlaboratory evaluation of trace element determination in workplace air filter samples by inductively coupled plasma mass spectrometry.

Inductively coupled plasma mass spectrometry (ICP-MS) is becoming more widely used for trace elemental analysis in the occupational hygiene field, and consequently new ICP-MS international standard procedures have been promulgated by ASTM International and ISO. However, there is a dearth of interlaboratory performance data for this analytical methodology. In an effort to fill this data void, an...

Field portable X-Ray fluorescence for rapid analysis Of titanium dioxide on air filters

Field portable X-Ray fluorescence for rapid analysis Of titanium dioxide on air filters. ii ACKNOWLEDGMENTS This study would not have been possible without the help from several different resources. I would like to thank Kent Candee for the access to the field portable x-ray fluorescence analyzer, which was my biggest concern from the beginning of the project. I would also like to thank Pam Kos...

(Carboxy-3-oxopropylamino)-3-propylsilylcellulose as a novel organocatalyst for the synthesis of coumarin derivatives under solvent-free conditions

In this research, (Carboxy-3-oxopropylamino)-3-propylsilylcellulose (COPAPSC) as an organocatalyst, has been synthesized by grafting of succinic anhydride on the NH2-modified cellulose (cellulose functionalized with 3- aminopropyltriethoxysilane). The –CO2H group-functionalized cellulose (COPAPSC) is used as a catalyst for the synthesis of coumarin derivatives from the reaction of phenolic subs...

Side by Side Comparison of the Aerotrap Total Fungal Sampler with Grease Slides, the Aerotrap Total Fungal Sampler with Glyceryl Triacetate Cleared Mixed Cellulose Ester Membrane Filter Slides and the Zefon Bio-Pump using the Zefon Air-O-Cell

Microclimate under different shading screens in greenhouses cultivated with bromeliads

This study had as its objective the evaluation of the influence of shading screens of different colors on the different microclimate variables in a greenhouse covered with transparent low-density polyethylene (LDPE). The experiment was conducted with five treatments: thermo-reflective screen (T1); a control without screen (T2); red screen (T3); blue screen (T4); and black screen (T5), all of th...