Data collected from incarcerated youth (n = 113) and a public school sample (n = 802) demonstrate that both adolescent groups have a high level of AIDS knowledge. Incarcerated youth are less aware of HIV risk-reduction behaviors and report markedly higher rates of HIV risk behaviors. Incarcerated youth are at substantially increased risk of HIV infection relative to their school-based counterparts and should be a primary target of HIV prevention programs.

An anonymous self-report survey was completed by 335 sexually active, incarcerated adolescents in a southern rural state. Multivariate logistic regression analysis was used to identify correlates of condom use during sexual intercourse. Four variables were identified as associated with frequent condom use: nonuse of marijuana, nonuse of beer, asking sexual partners about their sexual history, and feeling worried about friends contracting AIDS. This four-variable model was highly significant, correctly classifying 70% of the adolescents in their condom-use categories. The intersecting nature of substance use and the HIV epidemic is discussed, as well as the importance of teaching substance refusal skills and sexual communication and negotiation skills to incarcerated adolescents.

No abstract

The aim of this study was to estimate the amount of depleted uranium (DU) in the respiratory system of Allied Forces Gulf War Veterans. Mass spectrometry (thermal ionization mass spectrometry) analysis of 24-hour urinary excretion of DU isotopes in five positive (238U/235U > 191.00) and six negative (238U/235U > 138.25) veterans was utilized in the mathematical estimation of the pulmonary burden at the time of exposure. A minimum value for the biological half-life of ceramic DU oxide in the lungs was derived from the Battelle report of the minimum dissolution half-time in simulated interstitial lung fluid corresponding to 3.85 years. The average DU concentration was 3.27 x 10(-5) mg per 24 hours in DU-positive veterans and 1.46 x 10(-8) mg in DU-negative veterans. The estimated lung burden was 0.34 mg in the DU-positive and 0.00015 mg in the DU-negative veterans. Our results provide evidence that the pulmonary concentration of DU at time zero can be quantitated as late as 9 years after inhalational exposure.

The purpose of this work was to determine the concentration and ratio of uranium isotopes in allied forces Gulf War veterans. The 27 patients had their 24-hour urine samples analyzed for 234U, 235U, 236U, and 238U by mass spectrometry. The urine samples were evaporated and separated into isotopic dilution and concentration fraction by the chromatographic technique. The isotopic composition was measured by a thermal ionization mass spectrometer using a secondary electron multiplier detector and ion-counting system. The uranium blank control and SRM960 U isotopic standard were analyzed by the same procedure. Statistical analysis was done by an unpaired t test. The results confirm the presence of depleted uranium (DU) in 14 of 27 samples, with the 238U:235U ratio > 207.15. This is significantly different from natural uranium (p < 0.008) as well as from the DU shrapnel analysis, with 22.22% average value of DU fraction, and warrants further investigation.