Karen E. Schaefer

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Light microscopic examination of kidney tissue of guinea pigs exposed to 1.5% CO2, 21% O2, and balance N2 for periods as long as 42 days and of rats exposed to the same CO2 concentrations for up to 91 days showed that the incidence of focal kidney calcification increased with length of exposure. Calcification occurred primarily in the tubules of the renal(More)
Guinea pigs were exposed for up to 8 weeks to 0.5% CO2, 21% O2, and balance N2. Control groups of the same age were kept simultaneously in environmental chambers on air. A slight increase in PaCO2 and decrease in pH were observed at various periods of exposure to 0.5% CO2. After eight weeks of exposure, an increased kidney calcification, indicated by(More)
BACKGROUND The purpose of the present study was to examine the degree to which trait and cognitive (looming cognitive style) measures of anxiety are associated with suicidal ideation (SI), as well as whether trait and cognitive (time misperception) measures of impulsivity moderate the association between these variables. METHODS The sample included 100(More)
Bone CO2-titration curves were obtained in mature rats weighing 500-600 g. Animals were exposed for one hour to 1, 3, 5, 10, or 15% CO2 in air. Measurements of bone CO2, were made using a modified titrimetric analysis on fresh and oven-dried samples of paired rat femurs. A manometric method was used for comparison. Arterial blood samples were obtained for(More)
Circadian rhythms of body temperatures, pulse rate, and respiration rate were measured in 11 subjects every 4 h during certain periods on two submarine patrols. Data on systolic and diastolic blood pressure were also obtained on five crew members during the first period. All the subjects of the first patrol were on an 18-h watch schedule (6 h on, 12 h off).(More)
Previous research finds that self-control is positively associated with adaptive and negatively associated with maladaptive behavior. However, most previous studies use cross-sectional designs, low-risk samples, and limited assessments of self-control. This study of 553 jail inmates examined the relationship of a valid measure of self-control (Brief(More)
Childhood sexual abuse (CSA) is relatively common and is associated with a multitude of negative outcomes in adulthood, including posttraumatic stress disorder (PTSD) and lower marital satisfaction. However, CSA has been understudied in military samples. The purpose of the present study was to examine the relative contributions of CSA and combat exposure to(More)
Guinea pigs and rats exposed to 15% CO2 for 7 days showed a parallel time course of changes in pH, body temperature (TB), and oxygen consumption (VO2). Between 1 and 6 h of exposure the maximal drop in actual pH occurred in guinea pigs simultaneously with the maximal fall in TB and VO2. During the subsequent period pH TB, VO2 rose again. Skin blood content(More)
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