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R Schoen

Publications and source records attributed to R Schoen.

47 records · Page 3Linked to original sources
PubMedDate not supplied

The impact of fertility intentions on behavior: the case of sterilization.

In this paper, we take a new approach to the question of whether or not intentions regarding future fertility affect fertility-related behavior. Our approach has three principal features: 1) it takes sterilization as its outcome, rather than pregnancy or birth; 2) it is based on a conceptual model in which fertility-related behavior is seen as determined by a long-range planning process, modified by unanticipated life course contingencies; and 3) it uses data on desired total family size. Using data from the National Survey of Families and Households, we find that achieving one's desired parity has a strong, persistent, and positive effect on the probability of sterilization, supporting our view of the long-term nature of fertility intentions. People do modify their behavior in the face of unanticipated contingencies, but those effects are unexpectedly small.

Adolescent↗
PubMedDate not supplied

Determination of o-phenylphenol, diphenylamine, and propargite pesticide residues in selected fruits and vegetables by gas chromatography/mass spectrometry.

A simple and rapid method was developed to detect o-phenylphenol, diphenylamine, and propargite in selected fruits and vegetables. Gas chromatography/mass spectrometry in the selective-ion monitoring mode was used to identify and quantitate the 3 residues. Residues were extracted with acetonitrile and transferred to acetone. Limits of detection were 10, 8, and 15 ppb for o-phenylphenol, diphenylamine, and propargite, respectively. Recovery data were obtained by fortifying 4 matrixes (apples, oranges, canned peaches, and spinach) at 0.025-0.888 ppm. The method provides very good linearity data with low coefficients of variation.

Biphenyl Compounds↗