Barometric Pressure
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Effect of Environment on Staphylococcal Lesions in Mice
The influence of reduced barometric pressure on the development and healing of staphylococcal skin lesions in mice was investigated by exposing groups of animals to the test environment before, after, or before and after subcutaneous inoculation with 3.5 × 108 colony-forming units of a phage type 80 strain of Staphylococcus aureus. Similarly infected contro
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14. Residual delay maps unveil global patterns of atmospheric nonlinearity and produce improved local forecasts
We use residual-delay maps of observational field data for barometric pressure to demonstrate the structure of latitudinal gradients in nonlinearity in the atmosphere. Nonlinearity is weak and largely lacking in tropical and subtropical sites and increases rapidly into the temperate regions where the time series also appear to be much noisier. The degree of
The National Academy of Sciences.
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15. Reduction of pore area of the avian eggshell as an adaptation to altitude
Standard measurements of water vapor conductance in units of mg of H2O · day-1 · torr-1 (SI equivalent is mg of H2O · day-1 · pascal-1) of fresh eggs of the red-winged blackbird (Agelaius phoeniceus) and the native chicken of India (Gallus gallus) collected at altitude are significantly less than those of eggs of the same species collected near sea level
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16. Hypoxia-induced increases in pulmonary transvascular protein escape in rats. Modulation by glucocorticoids.
Pulmonary edema after ascent to altitude is well recognized but its pathogenesis is poorly understood. To determine whether altitude exposure increases lung vascular permeability, we exposed rats to a simulated altitude of approximately 14,500 feet (barometric pressure [Pb] 450 Torr) and measured the pulmonary transvascular escape of radiolabeled 125I-albumi
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17. Mechanisms of hypoxia-induced periodic breathing during sleep in humans.
Ventilation was studied during wakefulness and sleep in six healthy humans in normoxia (mean barometric pressure (PB) = 740 torr), and in hypobaric hypoxia (PB = 455 torr). Hypoxia caused hyperventilation and hypocapnic alkalosis (delta Pa,CO2 = -7 torr) during wakefulness and in all sleep states. Periodic breathing was the predominant pattern of breathing i
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18. An annual cycle in the ventilatory capacity of men with pneumoconiosis and of normal subjects
The forced expiratory volume over 0·75 second (F.E.V.0·75) was measured monthly for 3 years in 28 working ex-miners with pneumoconiosis and for one year in 17 normal laboratory workers. A significant annual cyclical variation of 0·044 litre amplitude was found in the ex-miners, with minimum and maximum values on 2 February and 3 August respectively. In th
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19. Effect of CO2 on the metabolic and ventilatory responses to ambient temperature in conscious adult and newborn rats.
1. In newborn and adult rats, hypoxia decreases metabolic rate, especially at low ambient temperatures (Ta). We examined whether a similar effect can occur during hypercapnia. 2. We measured metabolism (oxygen consumption, Vo2, open flow-through method), and expiratory ventilation (VE; barometric method (adults), airflow plethysmograph (newborns)) in air and
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20. Association of severe asthma attacks with weather, pollen, and air pollutants.
BACKGROUND: The association between exacerbations of asthma and weather or air pollution is not well understood. The relationships between visits to the emergency room for asthma attacks and the meteorological, aerobiological, and chemical characteristics of the outdoor air have been evaluated. METHODS: The number of daily attendances for asthma attacks at t
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21. Stress Genes and Proteins in the Archaea
The field covered in this review is new; the first sequence of a gene encoding the molecular chaperone Hsp70 and the first description of a chaperonin in the archaea were reported in 1991. These findings boosted research in other areas beyond the archaea that were directly relevant to bacteria and eukaryotes, for example, stress gene regulation, the structur
American Society for Microbiology.