The rapid, degenerate 1,2-hydride shift in 2,3-dimethyl-2-butyl cation in stable solution in SbF5/ S02C1F was perturbed by deuterium and 13C leading to splittings observed by 13C NMR spectros­ copy over a range of temperatures. Accurate values for equilibrium isotope effects were obtained from these data. Theoretical calculations of the equilibrium isotope effects were performed using the Gauss...

5 Manning, A., Animal Behaviour, 9, 82-92 (1961). 6 Ibid., 11, 116-120 (1963). 7Ewing, A. W., Animal Behaviour, 9, 93-99 (1961). 8Ibid., 11, 369-378 (1963). 'Pearce, S., Animal Behaviour, 8, 232 (1960), and unpublished. "Brncic, D., and S. Koref-Santibanez, Genetics, 49, 585-591 (1964). 11 Caspari, E., in Behavior and Evolution, ed. A. Roe and G. G. Simpson (New Haven: Yale, 1958), pp. 103-127....

Vascular anomalies are congenital vascular tissue aberrations, hich are commonly identified in the head and neck and known to ffect approximately 1 in 22 children. The most recent classificaion of vascular anomalies includes two main categories: vascular umours (haemangiomas) and vascular malformations [1]. Several problems can arise from vascular tumours, including unctional (through mass effe...

1 Yale School of Medicine, New Haven, CT, United States, 2 Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT, United States, 3 Yale Cancer Center, Yale School of Medicine, New Haven, CT, United States, 4 University of Connecticut School of Medicine, Farmington, CT, United States, 5 Department of Biostatistics, Yale School of Public Health, New Haven, CT, United States,...

1 Department of Genetics, Yale School of Medicine, New Haven, Connecticut, United States of America, 2 Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, United States of America, 3 Department of Therapeutic Radiology, Yale School of Medicine, New Haven, Connecticut, United States of America, 4 Yale Cancer Center, New Haven, Connecticut, United States ...

Exposure to elevated air pollution levels can aggravate pollen allergy symptoms. The aim of this study was to investigate the relationships between airborne birch (Betula) pollen, urban air pollutants NO2, O3 and PM10 and their effects on antihistamine demand in Gothenburg and Malmö, Sweden, 2006-2012. Further, the influence of large-scale weather pattern on pollen-/pollution-related risk, usin...

Entrevista con el profesor Stuart B. Schwartz, de la cátedra George Burton Adams Universidad Yale (New Haven, Connecticut). El Schwartz habla su trayectoria académica, porqué dedicación a Historia Brasil, sus actuales inquietudes como e investigador, futuros proyectos y situación actual Brasil historiografía.

Abstract The Porter hypothesis and the pollution haven seem to predict opposite reactions by firms facing environmental regulation, as first invokes arising of a win–win solution while second envisages possibility for flee abroad. We illustrate designing policies (taking form either emission taxation or standards) able eliminate firms’ incentives relocate their plants abroad create parallel inc...