Saint-Domingue Refugees and their Enslaved Property : Abolition Societies and the Enforcement of Gradual Emancipation in Pennsylvania and New York

Ce mémoire porte sur le rôle des cercles abolitionnistes dans l’application des lois sur l’émancipation graduelle de l’esclavage dans le nord des États-Unis vers la fin du dix-huitième siècle, principalement à New York et en Pennsylvanie. Plus particulièrement, il met en lumière la façon dont ces cercles, dont les deux plus importants étaient la Pennsylvania Abolition So-ciety (PAS) et le New­York Manumission Society (NYMS), ont fait face aux centaines de réfugiés de Saint-Domingue qui sont arrivés avec leurs esclaves sur la côte est américaine pour fuir la révolution haïtienne dans les années 1790. Dans un premier temps, ce mémoire étudie l’abolition graduelle de l’esclavage dans le nord des États-Unis, débutant avec la Pennsylvanie en 1780, et la formation des cercles abolitionnistes dans les anciennes colonies anglaises. Il sera en outre question des stratégies des antiesclavagistes américains afin de promouvoir l’abolition graduelle de l’esclavage et d’empêcher le mouvement des esclaves et des noirs libres en dehors des frontières de leurs États respectifs. Il sera aussi question de leurs efforts pour resserrer davantage les clauses des lois existantes à ce sujet. Dans un second temps, dans le but de mettre en relief la contribution des cercles abolitionnistes, ce mémoire procède à une étude de cas sur la manière dont les réfugiés de Saint-Domingue ont interagi avec l’esclavage résiduel à New York et en Pennsylvanie et cherche à comprendre pourquoi leurs tentatives d’échapper aux lois sur l’émancipation graduelle se sont heurtées, à plusieurs reprises, aux stratégies des sociétés antiesclavagistes.

Raman spectroscopy of the molybdate minerals chillagite (tungsteinian wulfenite-I4), stolzite, scheelite, wolframite and wulfenite

Raman spectra of chillagite, wulfenite, stolzite, scheelite and wolframite were obtained at 298 and 77 K using a Raman microprobe in combination with a thermal stage. Chillagite is a solid solution of wulfenite and stolzite. The spectra of these molybdate minerals are orientation dependent. The band at 695 cm-1 is interpreted as an antisymmetric bridging mode associated with the tungstate chain. The bands at 790 and 881 cm-1 are associated with the antisymmetric and symmetric Ag modes of terminal WO2 whereas the origin of the 806 cm-1 band remains unclear. The 4(Eg) band was absent for scheelite. The bands at 353 and 401 cm-1 are assigned as either deformation modes or as r(Bg) and (Ag) modes of terminal WO2. The band at 462 cm-1 has an equivalent band in the infrared at 455 cm-1 assigned as as(Au) of the (W2O4)n chain. The band at 508 cm-1 is assigned as sym(Bg) of the (W2O4)n chain.

Clinical Accuracy of the MedGem Indirect Calorimeter for Measuring Resting Energy Expenditure in Cancer Patients

OBJECTIVE: To compare, in patients with cancer and in healthy subjects, measured resting energy expenditure (REE) from traditional indirect calorimetry to a new portable device (MedGem) and predicted REE. DESIGN: Cross-sectional clinical validation study. SETTING: Private radiation oncology centre, Brisbane, Australia. SUBJECTS: Cancer patients (n = 18) and healthy subjects (n = 17) aged 37-86 y, with body mass indices ranging from 18 to 42 kg/m(2). INTERVENTIONS: Oxygen consumption (VO(2)) and REE were measured by VMax229 (VM) and MedGem (MG) indirect calorimeters in random order after a 12-h fast and 30-min rest. REE was also calculated from the MG without adjustment for nitrogen excretion (MGN) and estimated from Harris-Benedict prediction equations. Data were analysed using the Bland and Altman approach, based on a clinically acceptable difference between methods of 5%. RESULTS: The mean bias (MGN-VM) was 10% and limits of agreement were -42 to 21% for cancer patients; mean bias -5% with limits of -45 to 35% for healthy subjects. Less than half of the cancer patients (n = 7, 46.7%) and only a third (n = 5, 33.3%) of healthy subjects had measured REE by MGN within clinically acceptable limits of VM. Predicted REE showed a mean bias (HB-VM) of -5% for cancer patients and 4% for healthy subjects, with limits of agreement of -30 to 20% and -27 to 34%, respectively. CONCLUSIONS: Limits of agreement for the MG and Harris Benedict equations compared to traditional indirect calorimetry were similar but wide, indicating poor clinical accuracy for determining the REE of individual cancer patients and healthy subjects.