Now showing items 872-891 of 17472

• #### At the Heart of the Genome: Rare Genetic Variation, Cardiovascular Disease, and Therapy ﻿

(2014-06-06)
Studies of large families with inherited single gene disorders identified a role of rare genetic variation as a cause of disease and enabled gene-based diagnosis. The increasing availability of population-scale genomic ...
• #### At the Origins of Welfare Policy: Law and the Economy in the Pre-Modern Mediterranean (1150-1350) ﻿

(2014-10-21)
This dissertation is an economic and institutional history of the first comprehensive public health and welfare system in the Western world. Based on previously unexamined archival and archaeological evidence from several ...
• #### Atlantic Cable ﻿

(Victorian Studies Association of Western Canada, 2008)
• #### Atlas of quasar energy distributions ﻿

(IOP Publishing, 1994)
We present an atlas of the spectral energy distributions (SEDs) of normal, nonblazar, quasars over the whole available range (radio to 10 keV X-rays) of the electromagnetic spectrum. The primary (UVSX) sample includes 47 ...
• #### ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider ﻿

(Springer Berlin Heidelberg, 2015)
This paper reviews and extends searches for the direct pair production of the scalar supersymmetric partners of the top and bottom quarks in proton–proton collisions collected by the ATLAS collaboration during the LHC Run ...
• #### Atmosphere-biosphere exchange of CO 2 and O 3 in the central Amazon Forest ﻿

(Wiley-Blackwell, 1990)
Measurements of vertical fluxes for CO2 and O3 were made at a level 10 m above the canopy of the Amazon forest during the wet season, using eddy correlation techniques. Vertical profiles of CO2 and O3 were recorded ...
• #### Atmospheric Acetylene and its Relationship with CO as an Indicator of Air Mass Age ﻿

(American Geophysical Union, 2007)
Acetylene (C2H2) and CO originating from combustion are strongly correlated in atmospheric observations, offering constraints on atmospheric dilution and chemical aging. We examine here the C2H2-CO relationships in aircraft ...
• #### Atmospheric budget of acetone ﻿

(Wiley-Blackwell, 2002)
The atmospheric budget and distribution of acetone are investigated by using a priori estimates of sources and sinks to constrain a global three-dimensional atmospheric model simulation and then using atmospheric observations ...
• #### Atmospheric Characterization of 5 Hot Jupiters with Wide Field Camera 3 on the Hubble Space Telescope ﻿

(IOP Publishing, 2014)
We probe the structure and composition of the atmospheres of five hot Jupiter exoplanets using the Hubble Space Telescope Wide Field Camera 3 (WFC3) instrument. We use the G141 grism (1.1-1.7 μm) to study TrES-2b, TrES-4b, ...
• #### Atmospheric chemistry in the Arctic and subarctic: Influence of natural fires, industrial emissions, and stratospheric inputs ﻿

(Wiley-Blackwell, 1992)
Haze layers with perturbed concentrations of trace gases, believed to originate from tundra and forest wild fires, were observed over extensive areas of Alaska and Canada in 1988. Enhancements of CH, CH, CH, CH, and CH ...
• #### Atmospheric Constraints on the Surface UV Environment of Mars at 3.9 Ga Relevant to Prebiotic Chemistry ﻿

(Mary Ann Liebert Inc, 2017)
Recent findings suggest Mars may have been a clement environment for the emergence of life, and may even have compared favorably to Earth in this regard. These findings have revived interest in the hypothesis that prebiotically ...
• #### Atmospheric deposition exposes Qinling pandas to toxic pollutants ﻿

(Wiley-Blackwell, 2017)
The giant panda (Ailuropoda melanoleuca) is one of the most endangered animals in the world, and it is recognized worldwide as a symbol for conservation. A previous study showed that wild and captive pandas were exposed ...
• #### Atmospheric distribution of 85 Kr simulated with a general circulation model ﻿

(Wiley-Blackwell, 1987)
A three-dimensional chemical tracer model for the troposphere is used to simulate the global distribution of 85Kr, a long-lived radioisotope released at northern mid-latitudes by nuclear industry. Simulated distributions ...
• #### Atmospheric Heat Redistribution and Collapse on Tidally Locked Rocky Planets ﻿

(IOP Publishing, 2015)
Atmospheric collapse is likely to be of fundamental importance to tidally locked rocky exoplanets, but it remains understudied. Here, general results on the heat transport and stability of tidally locked terrestrial-type ...
• #### Atmospheric hydrogen cyanide (HCN): Biomass burning source, ocean sink? ﻿

(Wiley-Blackwell, 2000)
The observed seasonal amplitude of atmospheric HCN concentrations implies an atmospheric lifetime of only a few months for HCN, much shorter than is commonly assumed from oxidation by OH (a few years). We propose that ocean ...
• #### Atmospheric nitrogen evolution on Earth and Venus ﻿

(Elsevier BV, 2016)
Nitrogen is the most common element in Earth's atmosphere and also appears to be present in significant amounts in the mantle. However, its long-term cycling between these two reservoirs remains poorly understood. Here a ...
• #### Atmospheric Observations and Models of Greenhouse Gas Emissions in Urban Environments ﻿

(2015-05-18)
Greenhouse gas emission magnitudes, trends, and source contributions are highly uncertain, particularly at sub-national scales. As the world becomes increasingly urbanized, one potential strategy for reducing these ...
• #### Atmospheric Peroxyacetyl Nitrate (PAN): A Global Budget and Source Attribution ﻿

(Copernicus GmbH, 2014)
Peroxyacetyl nitrate (PAN) formed in the atmospheric oxidation of non-methane volatile organic compounds (NMVOCs) is the principal tropospheric reservoir for nitrogen oxide radicals $(NO_x = NO + NO_2)$. PAN enables the ...
• #### Atmospheric Phase Correction Using Total Power Radiometry at the Submillimeter Array ﻿

(IOP Publishing, 2004)
Phase noise caused by an inhomogeneous, time-variable water vapor distribution in our atmosphere reduces the angular resolution, visibility amplitude and coherence time of millimeter and submillimeter wavelength interferometers. ...
• #### The atmospheric sulfur cycle over the Amazon Basin: 2. Wet season ﻿

(Wiley-Blackwell, 1990)
We determined the fluxes and concentrations of atmospheric sulfur species at ground level and from aircraft over the Amazon Basin during the 1987 wet season, providing a comprehensive description of the sulfur cycle over ...