979 resultados para Arabian horse


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Mode of access: Internet.

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Description based on: 37th (1943).

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Printed on one side of leaf only.

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Oxygen exposure has a large impact on lipid biomarker preservation in surface sediments and may affect the application of organic proxies used for reconstructing past environmental conditions. To determine its effect on long chain alkyl diol and keto-ol based proxies, the distributions of these lipids was studied in nine surface sediments from the Murray Ridge in the Arabian Sea obtained from varying water depths (900 to 3000 m) but in close lateral proximity and, therefore, likely receiving a similar particle flux. Due to substantial differences in bottom water oxygen concentration (<3 to 77 µmol/L) and sedimentation rate, substantial differences exist in the time the biomarker lipids are exposed to oxygen in the sediment. Long chain alkyl diol and keto-ol concentrations in the surface sediments (0-0.5 cm) decreased progressively with increasing oxygen exposure time, suggesting increased oxic degradation. The 1,15-keto-ol/diol ratio (DOXI) increased slightly with oxygen exposure time as diols had apparently slightly higher degradation rates than keto-ols. The ratio of 1,14- vs. 1,13- or 1,15-diols, used as upwelling proxies, did not show substantial changes. However, the C30 1,15-diol exhibited a slightly higher degradation rate than C28 and C30 1,13-diols, and thus the Long chain Diol Index (LDI), used as sea surface temperature proxy, showed a negative correlation with the maximum residence time in the oxic zone of the sediment, resulting in ca. 2-3.5 °C change, when translated to temperature. The UK'37 index did not show significant changes with increasing oxygen exposure. This suggests that oxic degradation may affect temperature reconstructions using the LDI in oxic settings and where oxygen concentrations have varied substantially over time.

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What does the world's engagement with the unfolding crisis in Darfur tell us about the impact of the Iraq war on the norm of humanitarian intervention? Is a global consensus about a "responsibility to protect" more or less likely? There are at least three potential answers to these questions. Some argue that the merging of strategic interests and humanitarian goods amplified by the intervention in Afghanistan makes it more likely that the world's most powerful states will act to prevent or halt humanitarian crises. Others insist that the widespread perception that the United States and its allies "abused" humanitarian justifications to legitimate its invasion of Iraq has set back efforts to build a global consensus about humanitarian action. A third group argues that the "responsibility to protect" inhibits the potential for abuse and, as a result, consensus is likely to strengthen post-Iraq for precisely this reason. Through a detailed study of the international engagement with Darfur, I suggest that the latter two arguments have merit but need to be adjusted. I argue that the humanitarian intervention norm has changed in two subtle ways. First, while the strength of the norm itself has not changed, the credibility of the United States and U.K. as "norm carriers" has been significantly undermined. Second, while the "responsibility to protect" has been invoked to support international activism, it has also re-legitimated anti-interventionist arguments.

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Health professionals need to be cognizant of the varying perceptions of health shared by people from different religious, sociocultural, and linguistic backgrounds to deliver culturally sensitive health care. In this qualitative study, the authors used semistructured interviews to provide insight into how 10 older Arabian Gulf Muslim persons understand and perceive health and illness with emphasis on the role of Islam in formulating health behaviors. Participants' views were strongly influenced by their religious convictions. Good health was equated with the absence of visible disease, with participants demonstrating limited understanding of silent or insidious disease. They attended doctors for treatment of visible disease rather than seeking preventive health care for diseases such as hypertension, diabetes, and hyperlipidemia. Building oil the results from this study could help inform both health service planners and providers to improve the appropriateness, relevancy, and effectiveness of aged care services for these individuals.