We studied 572 men and women who participated in a blood pressure screening program at a government unemployment office. Before having their blood pressures taken, the subjects completed a brief questionnaire that included two items measuring conflict over anger expression. Information was also obtained on obesity, race, sex, social class, and age. Across all subjects, systolic blood pressure was found to be significantly related to suppressed anger (p less than 0.016). Normotensive were twice as likely as hypertensives to be free of suppressed anger. This relationship remained after controlling for the covariates of age, social class, and obesity. The relationship between suppressed anger and systolic blood pressure was significant for white men, exhibited a trend in black men, and was not significant for women. In contrast to the systolic findings, suppressed anger was unrelated to diastolic pressure in all the analyses.

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Unimolecular decomposition reactions of 1,2-difluoroethane are investigated over the energy range 6.0 < £ < 9.0 eV by using classical trajectory methods, Metropolis sampling procedures, and a previously formulated potential-energy surface. Vibrational predissociation of C2H4"F2 complexes on the same potential surface is also examined. The decomposition channels for 1,2-difluoroethane are, in order of importance, four-center HF elimination, C-C bond rupture, and hydrogen-atom dissociation. The kinetics are found to be first order and the microcanonical rate coefficients fit a simple RRK form. The high-pressure limiting rates for HF elimination and C-C bond rupture are 4.39 X 1012 exp[-2.775 eV/RT] and 2.44 X 1013 exp[-3.925 eV/RT] s"1, respectively. For four-center HF elimination, the average fraction of the total energy partitioned into translation, internal HF motion, and internal modes of CH2=CHF are found to lie in the ranges 0.13-0.16, 0.09-0.13, and 0.71-0.74, respectively, independent of the total energy. The HF vibrational energy distributions are noninverted and contain an average of 6.6-9.2% of the total energy. Comparison of the present results with those for the bimolecular C2H4 + F2 reaction to form 1,2-difluoroethane as a reaction intermediate shows that the energy distribution in the collisional intermediate is not completely randomized during the lifetime of the intermediate. Vibrational predissociation (VP) rates for C2H4-F2 complexes are found to be in the range (1-3) X 1012 s_1. Mode specific rate enhancement is found for excitation of the nonplanar CH2 rocking mode of C2H4. The calculated product yields, microcanonical rate coefficients, and energy-partitioning results are shown to be in generally good accord with experimental data. The comparison indicates that the potential barrier for the C2H4 + F2 -FH2C-CH2F reaction predicted by the empirical surface is too large. The energy-partitioning data suggest that the transition state for four-center HF elimination on the present potential surface is too productlike. Comparison of the VP rates with measured lifetimes for (C2H4)2 dimers indicates that the C2H4-F2 complex has greater stability than that predicted by the empirical potential surface.