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Objective Recent reports have documented health disparities according to sexual orientation and used the minority stress model as a framework for understanding their origins. To date, however, sexual orientation‐related disparities in the oral health domain have not been evaluated. Accordingly, this study sought to investigate potential health disparities in objectively‐assessed and subjective reports of oral heath among lesbian, gay, and bisexual adults relative to the heterosexual community‐dwelling US population. Methods We used three consecutive cycles (2009–2014) of National Health and Nutrition Examination Survey (NHANES) data for men and women aged 18–59 years. We examined clinical measures of dental caries, tooth loss, chronic periodontitis, and oral human papillomavirus (HPV) as well as subjective reports of oral health status and use of dental services. Results Clinical measures of oral disease did not differ according to sexual orientation; however, bisexual adults were more likely to rate their oral health unfavorably (41%) than heterosexual adults (27%). Gay men reported “bone loss around teeth” more frequently (35%) than heterosexual (11%) and bisexual (10%) men. Bisexual individuals were more likely to confront barriers to accessing dental care (30%) versus heterosexual adults (19%). Conclusions While clinical measures of oral health did not substantially differ between sexual orientation strata, subjective measures of oral health were worse among gay, lesbian, and bisexual adults versus heterosexual adults. Further study of the psychosocial construction of oral health among sexual minorities is warranted.

Steady-state reaction rates have been measured simultaneously with XPS and UPS spectra to determine adsorbate chemical states and coverages during the NO + CO reaction and during NO decomposition on Rh( 11 1) surfaces. Steady-state NO + CO reaction rates have been determined for pressures between lo4 and 10" Torr, reactant partial pressure ratios (Pco/PNo) between 114 and 6411, and temperatures between 300 and 875 K. Near stoichiometric reactant compositions, the NO + CO reaction obeys a Langmuir-Hinshelwood model using elementary surface reaction steps. For Pco/PNo > 81 1, the oxygen coverage is always below that observed in adsorption-desorption equilibrium with gas-phase NO, and above 500 K the rate becomes limited by the NO adsorption rate. The reaction model, which assumes fast nitrogen desorption, quantitatively fits all reaction rates and also qualitatively fits measured NO, CO, and oxygen coverages except when Pco/PNo 5 1 at low temperatures.

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This study examines the history of the sugar economy and the peculiar development of plantation society over a three hundred year period in Bahia, a major sugar plantation zone and an important terminus of the Atlantic slave trade. Drawing on little-used archival sources, plantations accounts, and notarial records, Professor Schwartz has examined through both quantitative and qualitative methods the various groups that made up plantation society. While he devotes much attention to masters and slaves, he views slavery ultimately as part of a larger structure of social and economic relations. The peculiarities of sugar-making and the nature of plantation labour are used throughout the book as keys to an understanding of roles and relationships in plantation society. A comparative perspective is also employed, so that studies of slavery elsewhere in the Americas inform the analysis, while at many points direct comparisons of the Bahian case with other plantation societies are also made.