The determination of nitrogen dioxide in the atmos-phere has heretoforebeen hampered by
difficulties in sample absorption and lack of specificity. A new spe-cific reagent has been …

Fifteen miniature cyclone presamplers were studied, each with a different combination of
one of three cone lengths, three outlet tube inside diameters, and three outlet tube outside …

Gender is a basic variable in determining health status and longevity in the United States
and throughout the world. Men and women have different life spans and experience different …

Finding cancer at its earliest, most treatable stage gives patients the greatest chance of
survival. For a number of cancers, screening tests allow for early detection and treatment, and …

Sir: Recording air analyzers (P) em-ploying the Saltzman variation (1) of the Griess-Ilosvay
reaction are now com-monly used for determining both nitro-gen dioxide and nitric oxide. …

DISCUSSION AND CONCLUSIONS From the data of Figures 1, 2, and 4, it appears that
hydrolysis of the complex occurs rapidly in alcoholic solution at room temperature. A decrease …

Airborne dust samples generated during corn harvest were collected in 1979 from three farms
and a grain elevator in Georgia for a determination of the af latoxin content. The samples …

RESULTS Up to 25 samples can be run with one loading of the changer. However, it is
desirable to include about three standards among the samples to check the operation of the …

The “USPHS” method for determination of lead in air and biological samples has been
developed and tested over a quarter of a century. Complete details of procedure are presented …

Important factorsaffecting the accuracy of permeation tubes for nitrogen dioxide and several
hydrocarbons were studied. Two new methods of sealing the tube ends were developed. …