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Search Results: 1 - 10 of 600946 matches for " A. C. Baker "
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Another Toxoptera Feeding on Sedge (Homoptera; Aphidiae)
A. C. Baker
Psyche , 1918, DOI: 10.1155/1918/90147
Abstract:
Musical Preferences of Argentines and Uruguayans Living in Australia: Implications for Music Therapy Clinical Practice
Christobel C Moore,Felicity A Baker
Voices: A World Forum for Music Therapy , 2009,
Abstract: This article provides an overview of the elements that impact on the cultural identity of Argentines and Uruguayans in Australia, their relationship to music and the implications for music therapy clinical practice. A survey collected quantitative data on musical preferences and qualitative data on what respondents associated with different genres. The final sample of 12 respondents was not representative of the Australian communities, but collected data was congruent with the reviewed literature and significant internal consistency was observed.Classical music, ballads, folk and tango had the highest preference across age groups with consistent associations on musical, intrapersonal, interpersonal and abstract levels.
XI. Some Species of Oxybelus Found in New Mexico
T. D. A. Cockerell,C. F. Baker
Psyche , 1896, DOI: 10.1155/1896/58467
Abstract:
The Fate of Ultra-luminous Mergers
A. C. Baker,D. L. Clements
Physics , 1997,
Abstract: Essentially all Ultra-Luminous IR Galaxies (ULIRGs) are in disturbed, interacting or merging systems. It is known that interactions tend to induce galactic starbursts. Thus, elliptical galaxies which are formed in mergers will tend to have high metallicity, low dust and molecular gas content, and faint structural distortions, as observed for the bone fide elliptical galaxy population. The old stellar population in the merged galaxies will probe the new gravitational potential, relaxing rapidly to give a de Vaucouleurs surface-brightness profile if the remnant is elliptical-like. We examine the old stellar population in 10 nearby (z < 0.15) ULIRGs, using deep near-IR imaging photometry. These data reveal signs of elliptical-like structure in the near-IR one-dimensional surface brightness profiles, supporting the hypothesis that ultra-luminous mergers evolve into elliptical galaxies.
Bounded intervals containing many primes
R. C. Baker,A. J. Irving
Mathematics , 2015,
Abstract: By combining a sieve method of Harman with the work of Maynard and Tao we show that $$\liminf_{n\rightarrow \infty}(p_{n+m}-p_n)\ll \exp(3.815m).$$
Does terrestrial drought explain global CO2 flux anomalies induced by El Ni o?
C. R. Schwalm,C. A. Williams,K. Schaefer,I. Baker
Biogeosciences Discussions , 2011, DOI: 10.5194/bgd-8-4209-2011
Abstract: The El Ni o Southern Oscillation is the dominant year-to-year mode of global climate variability. El Ni o effects on terrestrial carbon cycling are mediated by associated climate anomalies, primarily drought, influencing fire emissions and biotic net ecosystem exchange (NEE). Here we evaluate whether El Ni o produces a consistent response from the global carbon cycle. We apply a novel bottom-up approach to estimating global NEE anomalies based on FLUXNET data using land cover maps and weather reanalysis. We analyze 13 yr (1997–2009) of globally gridded observational NEE anomalies derived from eddy covariance flux data, remotely-sensed fire emissions at the monthly time step, and NEE estimated from an atmospheric transport inversion. We evaluate the overall consistency of biospheric response to El Ni o and, more generally, the link between global CO2 flux anomalies and El Ni o-induced drought. Our findings, which are robust relative to uncertainty in both methods and time-lags in response, indicate that each event has a different spatial signature with only limited spatial coherence in Amaz nia, Australia and southern Africa. For most regions, the sign of response changed across El Ni o events. Biotic NEE anomalies, across 5 El Ni o events, ranged from 1.34 to +0.98 Pg C yr 1, whereas fire emissions anomalies were generally smaller in magnitude (ranging from 0.49 to +0.53 Pg C yr 1). Overall drought does not appear to impose consistent terrestrial CO2 flux anomalies during El Ni os, finding large variation in globally integrated responses from 1.15 to +0.49 Pg C yr 1. Contrary to previous accounts we find El Ni o events have, when globally integrated, both enhanced and weakened terrestrial sink strength, with no consistent response across events.
Critical Limb Ischaemia in Adult Human Skeletal Muscle Increases Satellite Cell Proliferation but Not Differentiation  [PDF]
C. A. Hart, J. Tsui, K. Khan, T. K. Ho, X. Shiwen, M. Ponticos, D. Abraham, D. M. Baker
Surgical Science (SS) , 2015, DOI: 10.4236/ss.2015.65031
Abstract:

Critical Limb Ischaemia (CLI) is defined as the presence of rest pain, ulcers and/or gangrene in a limb for over 2 weeks. Associated exercise intolerance is caused by muscle fibre atrophy, fibro- fatty infiltration, nerve dysfunction, mitochondrial damage and myofibril disorder. We aimed to determine the behaviour of satellite cells, responsible for the repair and regeneration of damaged muscle, in repairing the damage caused to critically ischaemic adult human skeletal muscle. CD34, pax7 and MyoD are all markers of satellite cells at different stages of the cell cycle and allow for an assessment of their number and activity in ischaemia. Local ethical committee approval and informed consent was obtained. Samples of harvested gastrocnemius muscle of patients undergoing major perigenicular amputation for CLI (n = 10) were analysed and compared to a control group undergoing coronary artery bypass grafting (n = 10). Using immunohistochemistry, the expression of pax7, CD34 and MyoD was assessed in five sequential blinded randomly generated fields. Statistical testing of the data collected was made via the Mann Whitney U test. Protein electrophoresis was used to confirm overall protein expression of the satellite cell markers. There was a significant increase in the number of satellite cells observed in CLI muscle sections as demonstrated by the expression of pax7 (2.4×fold p < 0.0001). CD34 expressingHaematopoietic Stem Cells(HSCs) and satellite cells were also more abundant, with a 2×fold increase observed (p < 0.0001) whilst those cells expressing both CD34 and pax7 and identified as quiescent satellite cells, were significantly greater in number in the CLI samples (2.9×fold p < 0.0001), confirmed via immunohistochemistry and protein electrophoresis. There was a significant decrease in the expression of MyoD positive or activated satellite cells (p < 0.0001). This indicates an increase in the proliferation of the satellite cell population as a response to CLI but less active cells are observed.

Analysis of non-methane hydrocarbons in air samples collected aboard the CARIBIC passenger aircraft
A. K. Baker, F. Slemr,C. A. M. Brenninkmeijer
Atmospheric Measurement Techniques (AMT) & Discussions (AMTD) , 2010,
Abstract: The CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) is a long-term monitoring program making regular atmospheric measurements from an instrument container installed monthly aboard a passenger aircraft. Typical cruising altitudes of the aircraft allow for the study of the free troposphere and the extra-tropical upper troposphere as well as the lowermost stratosphere. CARIBIC measurements include a number of real time analyses as well as the collection of aerosol and whole air samples. These whole air samples are analyzed post-flight for a suite of trace gases, which includes non-methane hydrocarbons (NMHC). The NMHC measurement system and its analytical performance are described here. Precision was found to vary slightly by compound, and is less than 2% for the C2–C6 alkanes and ethyne, and between 1% and 6% for C7–C8 alkanes and aromatic compounds. Preliminary results from participation in a Global Atmospheric Watch (WMO) VOC audit indicate accuracies within the precision of the system. Limits of detection are 1 pptv for most compounds, and up to 3 pptv for some aromatics. These are sufficiently low to measure mixing ratios typically observed in the upper troposphere and lowermost stratosphere for the longer-lived NMHC, however, in air samples from these regions many of the compounds with shorter lifetimes (<5 days) were frequently below the detection limit. Observed NMHC concentrations span several orders of magnitude, dependent on atmospheric region and air mass history, with concentrations typically decreasing with shorter chemical lifetimes.
Analysis of non-methane hydrocarbons in air samples collected aboard the CARIBIC passenger aircraft
A. K. Baker,F. Slemr,C. A. M. Brenninkmeijer
Atmospheric Measurement Techniques (AMT) & Discussions (AMTD) , 2010,
Abstract: The CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) is a long-term monitoring program making regular atmospheric measurements from an instrument container installed monthly aboard a passenger aircraft. Typical cruising altitudes of the aircraft allow for the study of the free troposphere and the extra-tropical upper troposphere as well as the lowermost stratosphere. CARIBIC measurements include a number of real time analyses as well as the collection of aerosol and whole air samples. These whole air samples are analyzed post-flight for a suite of trace gases, which includes non-methane hydrocarbons (NMHC). The NMHC measurement system and its analytical performance are described here. Precision was found to vary slightly by compound, and is less than 2% for the C2–C6 alkanes and ethyne, and between 1% and 6% for C7–C8 alkanes and aromatic compounds. Preliminary results from participation in a Global Atmospheric Watch (WMO) VOC audit indicate accuracies within the precision of the system. Limits of detection are 1 pptv for most compounds, and up to 3 pptv for some aromatics. These are sufficiently low to measure mixing ratios typically observed in the upper troposphere and lowermost stratosphere for the longer-lived NMHC, however, in air samples from these regions many of the compounds with shorter lifetimes (<5 days) were frequently below the detection limit. Observed NMHC concentrations span several orders of magnitude, dependent on atmospheric region and air mass history, with concentrations typically decreasing with shorter chemical lifetimes.
Analysis of non-methane hydrocarbons in air samples collected aboard the CARIBIC passenger aircraft
A. K. Baker,F. Slemr,C. A. M. Brenninkmeijer
Atmospheric Measurement Techniques Discussions , 2009,
Abstract: The CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) is a long-term monitoring program making regular atmospheric measurements from an instrument container installed monthly aboard a passenger aircraft. Typical cruising altitudes of the aircraft allow for the study of the free troposphere and the extra-tropical upper troposphere as well as the lowermost stratosphere. CARIBIC measurements include a number of real time analyses as well as the collection of aerosol and whole air samples. These whole air samples are analyzed post-flight for a suite of trace gases, which includes non-methane hydrocarbons (NMHC). The NMHC measurement system and its analytical performance are described here. Precision was found to vary slightly by compound, and is less than 2% for the C2–C6 alkanes and ethyne, and between 1 and 6% for C7–C8 alkanes and aromatic compounds. Preliminary results from participation in a Global Atmospheric Watch (WMO) VOC audit indicate accuracies within the precision of the system. Limits of detection are 1 pptv for most compounds, and up to 3 pptv for some aromatics. These are sufficiently low to measure mixing ratios typically observed in the upper troposphere and lowermost stratosphere for the longer-lived NMHC, however, in air samples from these regions many of the compounds with shorter lifetimes (<5 d) were frequently below the detection limit. Observed NMHC concentrations span many orders of magnitude, dependent on atmospheric region and air mass history, with concentrations typically decreasing with shorter chemical lifetimes.
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