2,948 results on '"S, Leonard"'
Search Results
52. Weighing the Evidence: What Is Revealed by 100+ Meta-Analyses and Systematic Reviews of Religion/Spirituality and Health?
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Oman, Doug, Syme, S. Leonard, Possamai-Inesedy, Alphia, Series Editor, Ellison, Christopher G., Series Editor, and Oman, Doug, editor
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- 2018
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53. A recursive partitioning approach to investigating correlates of self-rated health: The CARDIA Study
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Nayak, Shilpa, Hubbard, Alan, Sidney, Stephen, and Syme, S. Leonard
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- 2018
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54. Scenario-based modelling of waves generated by sublacustrine explosive eruptions at Lake Taupō, New Zealand
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Matthew W. Hayward, Emily M. Lane, Colin N. Whittaker, Graham S. Leonard, and William L. Power
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General Earth and Planetary Sciences - Abstract
Volcanogenic tsunami and wave hazard remains less understood than that of other tsunami sources. Volcanoes can generate waves in a multitude of ways, including subaqueous explosions. Recent events, including a highly explosive eruption at Hunga Tonga-Hunga Ha'apai and subsequent tsunami in January 2022, have reinforced the necessity to explore and quantify volcanic tsunami sources. We utilise a non-hydrostatic multilayer numerical method to simulate 20 scenarios of sublacustrine explosive eruptions under Lake Taupō, New Zealand, across five locations and four eruption sizes. Waves propagate around the entire lake within 15 min, and there is a minimum explosive size required to generate significant waves (positive amplitudes incident on foreshore of > 1 m) from the impulsive displacement of water from the eruption itself. This minimum size corresponds to a mass eruption rate of 5.8×107 kg s−1, or VEI 5 equivalent. Inundation is mapped across five built areas and becomes significant near shore when considering only the two largest sizes, above VEI 5, which preferentially impact areas of low-gradient slope. In addition, novel hydrographic output is produced showing the impact of incident waves on the Waikato River inlet draining the lake and is potentially useful for future structural impact analysis. Waves generated from these explosive source types are highly dispersive, resulting in hazard rapidly diminishing with distance from the source. With improved computational efficiency, a probabilistic study could be formulated and other, potentially more significant, volcanic source mechanisms should be investigated.
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- 2023
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55. The Value of Family Advisors as Coleaders in Pediatric Quality Improvement Efforts: A Qualitative Theme Analysis
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Suzanne Ramazani DO, Nathaniel D Bayer MD, Julie Albright Gottfried DNP, RN, CNS, CPNP-PC, Jenna Wagner, Michael S Leonard MD, MS, CPPS, Justin Lynn MD, MPH, and Jan Schriefer DrPH, MSN, MBA
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Medicine (General) ,R5-920 - Abstract
Engaging family advisors in pediatric quality improvement (QI) efforts is well-studied in intensive care but less understood in other settings. The purpose of this study was to assess the perceived impact of including a family advisor as a colead on a QI initiative that successfully improved the family-centered timing of routine morning blood tests performed on pediatric inpatients. Five structured written reflections from core QI team members were analyzed using inductive thematic analysis and 3 major themes were identified. The first found that a family advisor’s presence from the beginning of a QI initiative helps inform project design. The second determined that family partners working with residents fostered a better shared understanding of the role of trainees and caregivers in improving the quality of care. The third found that a family partner is an effective change agent to enact practice improvement, support professional development, and enhance resident education. Our qualitative analysis showed that engaging a family advisor as a colead influenced the design, implementation, and post-intervention impact of the initiative and improved family-centered outcomes.
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- 2020
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56. Identifying Pyroclastic Density Currents From Partial Outcrop Exposure on Mt. Ruapehu, New Zealand
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Janina K. Gillies, Ben M. Kennedy, Darren M. Gravley, Graham S. Leonard, and James Cowlyn
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pyroclastic density currents ,relative stratigraphy ,Ruapehu volcano ,hazard ,lithofacies ,column collapse ,Science - Abstract
Pyroclastic density current (PDC) deposits, especially small to medium volume events, have low preservation potential at many volcanoes, particularly when unconsolidated or deposited on steep, glaciated slopes. This may lead to an underrepresentation of these events in the eruptive record, and consequently, in hazard management planning; leaving populations on and around the volcanoes unprepared for the threat of these smaller eruptions. Therefore, it is important to investigate and recognize these smaller events in the volcanic record to create more comprehensive plans for future eruptions. Mt. Ruapehu is one of New Zealand’s most active volcanoes, last erupting in 2007. Few studies have investigated the PDC occurrence on this volcano, despite PDCs being one of the most hazardous volcanic processes. Poor preservation of PDC deposits, due to small volume, past glaciations, erosion, burial, and poor consolidation has left a significant gap in Mt. Ruapehu’s eruptive record. By identifying and characterizing PDCs on Mt. Ruapehu this paper provides an updated account of PDC occurrence on this volcano, especially for smaller scale PDCs. Comprehensive field-mapping forms the basis for this study by identifying PDC deposits from partial outcrop exposures. We use field observations of these deposits to describe the lithofacies and infer PDC behavior. Relative stratigraphy and whole-rock geochemistry are used to correlate deposits with dated units from literature and provide approximate age ranges. This study describes 12 PDC deposits representing at least 10 previously unidentified flows. Combined with PDCs identified in previous studies there is a total of 23 PDC deposits found on Mt. Ruapehu, including the PDC observed during the 1945 eruption. These PDCs have been emplaced throughout Mt. Ruapehu’s 250 ka eruptive history. The PDCs were concentrated and dominated by granular flow or granular fluid-based flow transport regimes. The lithofacies show PDCs forming from column collapse and dome collapse or explosion events. This demonstrates that Mt. Ruapehu is capable of producing a spectrum of PDC styles and sizes, something that must be considered during future hazard planning on the volcano.
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- 2020
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57. No evidence for neonicotinoid preferences in the bumblebee Bombus impatiens
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Felicity Muth, Rebekah L. Gaxiola, and Anne S. Leonard
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imidacloprid ,behaviour ,locomotor ,activity ,bee ,learning ,Science - Abstract
Neonicotinoid pesticides can have a multitude of negative sublethal effects on bees. Understanding their impact on wild populations requires accurately estimating the dosages bees encounter under natural conditions. This is complicated by the possibility that bees might influence their own exposure: two recent studies found that bumblebees (Bombus terrestris) preferentially consumed neonicotinoid-contaminated nectar, even though these chemicals are thought to be tasteless and odourless. Here, we used Bombus impatiens to explore two elements of these reported preferences, with the aim of understanding their ecological implication and underlying mechanism. First, we asked whether preferences persisted across a range of realistic nectar sugar concentrations, when measured at a series of time points up until 24 h. Second, we tested whether bees' neonicotinoid preferences were driven by an ability to associate their post-ingestive consequences with floral stimuli such as colour, location or scent. We found no evidence that foragers preferred to consume neonicotinoid-containing solutions, despite finding effects on feeding motivation and locomotor activity in line with previous work. Bees also did not preferentially visit floral stimuli previously paired with a neonicotinoid-containing solution. These results highlight the need for further research into the mechanisms underlying bees’ responses to these pesticides, critical for determining how neonicotinoid-driven foraging preferences might operate in the real world for different bee species.
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- 2020
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58. Optimizing behavioral interventions to regulate gestational weight gain with sequential decision policies using hybrid model predictive control.
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Penghong Guo, Daniel E. Rivera, Yuwen Dong, Sunil Deshpande, Jennifer S. Savage, Emily E. Hohman, Abigail M. Pauley, Krista S. Leonard, and Danielle Symons Downs
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- 2022
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59. Background model for the NaI(Tl) crystals in COSINE-100
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P. Adhikari, G. Adhikari, E. Barbosa de Souza, N. Carlin, S. Choi, W. Q. Choi, M. Djamal, A. C. Ezeribe, C. Ha, I. S. Hahn, A. J. F. Hubbard, E. J. Jeon, J. H. Jo, H. W. Joo, W. G. Kang, M. Kauer, W. S. Kang, B. H. Kim, H. Kim, H. J. Kim, K. W. Kim, M. C. Kim, N. Y. Kim, S. K. Kim, Y. D. Kim, Y. H. Kim, V. A. Kudryavtsev, H. S. Lee, J. Lee, J. Y. Lee, M. H. Lee, D. S. Leonard, W. A. Lynch, R. H. Maruyama, F. Mouton, S. L. Olsen, H. K. Park, H. S. Park, J. S. Park, K. S. Park, W. Pettus, H. Prihtiadi, S. Ra, C. Rott, A. Scarff, N. J. C. Spooner, W. G. Thompson, L. Yang, and S. H. Yong
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Astrophysics ,QB460-466 ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
Abstract The COSINE-100 dark matter search experiment is an array of NaI(Tl) crystal detectors located in the Yangyang Underground Laboratory (Y2L). To understand measured backgrounds in the NaI(Tl) crystals we have performed Monte Carlo simulations using the Geant4 toolkit and developed background models for each crystal that consider contributions from both internal and external sources, including cosmogenic nuclides. The background models are based on comparisons of measurement data with Monte Carlo simulations that are guided by a campaign of material assays and are used to evaluate backgrounds and identify their sources. The average background level for the six crystals (70 kg total mass) that are studied is 3.5 counts/day/keV/kg in the (2–6) keV energy interval. The dominant contributors in this energy region are found to be $$^{210}$$ 210 Pb and $$^3$$ 3 H.
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- 2018
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60. A recursive partitioning approach to investigating correlates of self-rated health: The CARDIA Study
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Shilpa Nayak, Alan Hubbard, Stephen Sidney, and S. Leonard Syme
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Public aspects of medicine ,RA1-1270 ,Social sciences (General) ,H1-99 - Abstract
Self-rated health (SRH) is an independent predictor of mortality; studies have investigated correlates of SRH to explain this predictive capability. However, the interplay of a broad array of factors that influence health status may not be adequately captured with parametric multivariate regression. This study investigated associations between several health determinants and SRH using recursive partitioning methods. This non-parametric analytic approach aimed to reflect the social-ecological model of health, emphasizing relationships between multiple health determinants, including biological, behavioral, and from social/physical environments. The study sample of 3648 men and women was drawn from the year 15 (2000–2001) data collection of the CARDIA Study, USA, in order to study a young adult sample. Classification tree analysis identified 15 distinct, mutually exclusive, subgroups (eight with a larger proportion of individuals with higher SRH, and seven with a larger proportion of lower SRH), and multi-domain risk and protective factors associated with subgroup membership. Health determinant profiles were not uniform between subgroups, even for those with similar health status. The subgroup with the largest proportion of higher SRH was characterized by several protective factors, whilst that with the largest proportion of lower SRH, with several negative risk factors; certain factors were associated with both higher and lower SRH subgroups. In the full sample, physical activity, education and income were highest ranked by variable importance (random forests analysis) in association with SRH. This exploratory study demonstrates the utility of recursive partitioning methods in studying the joint impact of multiple health determinants. The findings indicate that factors do not affect SRH in the same way across the whole sample. Multiple factors from different domains, and with varying relative importance, are associated with SRH in different subgroups. This has implications for developing and prioritizing appropriate interventions to target conditions and factors that improve self-rated health status. Keywords: Self-rated health, Health determinants, Recursive partitioning methods, Classification tree analysis, Random forests
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- 2018
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61. Initial performance of the COSINE-100 experiment
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G. Adhikari, P. Adhikari, E. Barbosa de Souza, N. Carlin, S. Choi, W. Q. Choi, M. Djamal, A. C. Ezeribe, C. Ha, I. S. Hahn, A. J. F. Hubbard, E. J. Jeon, J. H. Jo, H. W. Joo, W. G. Kang, W. Kang, M. Kauer, B. H. Kim, H. Kim, H. J. Kim, K. W. Kim, M. C. Kim, N. Y. Kim, S. K. Kim, Y. D. Kim, Y. H. Kim, V. A. Kudryavtsev, H. S. Lee, J. Lee, J. Y. Lee, M. H. Lee, D. S. Leonard, K. E. Lim, W. A. Lynch, R. H. Maruyama, F. Mouton, S. L. Olsen, H. K. Park, H. S. Park, J. S. Park, K. S. Park, W. Pettus, Z. P. Pierpoint, H. Prihtiadi, S. Ra, F. R. Rogers, C. Rott, A. Scarff, N. J. C. Spooner, W. G. Thompson, L. Yang, and S. H. Yong
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Astrophysics ,QB460-466 ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
Abstract COSINE is a dark matter search experiment based on an array of low background NaI(Tl) crystals located at the Yangyang underground laboratory. The assembly of COSINE-100 was completed in the summer of 2016 and the detector is currently collecting physics quality data aimed at reproducing the DAMA/LIBRA experiment that reported an annual modulation signal. Stable operation has been achieved and will continue for at least 2 years. Here, we describe the design of COSINE-100, including the shielding arrangement, the configuration of the NaI(Tl) crystal detection elements, the veto systems, and the associated operational systems, and we show the current performance of the experiment.
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- 2018
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62. Work time and 11-year progression of carotid atherosclerosis in middle-aged Finnish men.
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Krause, Niklas, Brand, Richard J, Kauhanen, Jussi, Kaplan, George A, Syme, S Leonard, Wong, Candice C, and Salonen, Jukka T
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Epidemiology ,Health Sciences ,Heart Disease ,Heart Disease - Coronary Heart Disease ,Atherosclerosis ,Cardiovascular ,Good Health and Well Being ,Carotid Artery Diseases ,Disease Progression ,Finland ,Humans ,Male ,Middle Aged ,Occupations ,Workload ,Public Health and Health Services ,Health services and systems ,Public health - Abstract
IntroductionStudies of the relationship between work time and health have been inconclusive. Consequently, we sought to examine the effect of work time on progression of atherosclerosis.MethodsThis prospective study of 621 middle-aged Finnish men evaluated effects of baseline and repeat measures of work time on 11-year progression of ultrasonographically assessed carotid intima-media thickness (IMT) and interactions with cardiovascular disease. Multiple linear regression models adjusted for 21 biological, behavioral, and psychosocial risk factorsResultsWorking 3 (minimum), 5 (medium), or 7 (maximum) days per week at baseline was associated with 23%, 31%, and 40% 11-year increases in IMT, respectively. The relative change ratio (RCR) at maximum vs minimum was 1.14 for baseline days worked per week and 1.10 for hours worked per year of follow-up. Significant interactions existed between cardiovascular disease and work time. Men with ischemic heart disease (IHD) who worked the maximum of 14.5 hours per day experienced a 69% increase in IMT compared with a 29% increase in men without IHD. The RCR ratio for IHD (RCRIHD/RCRno IHD) was 1.44 for hours per day. Similarly, the RCR ratio for baseline carotid artery stenosis was 1.29 for hours per day and 1.22 for hours per year.ConclusionIncreases in work time are positively associated with progression of carotid atherosclerosis in middle-aged men, especially in those with preexisting cardiovascular disease. Our findings are consistent with the hemodynamic theory of atherosclerosis.
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- 2009
63. Historical Perspective: The social determinants of disease – some roots of the movement
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Syme, S Leonard
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Public Health ,Health Sciences ,Good Health and Well Being ,Public Health and Health Services ,Epidemiology - Abstract
This is an account of the early days of research on social determinants as I experienced them. I describe my time as one of four Fellows in a new training program in Medical Sociology at Yale University and how I came to be the first Sociologist employed in the U.S. Public Health Service. I then became the first Executive Secretary of a new Study Section at NIH dealing with a small number of research grant proposals in the field of Epidemiology. My account deals with some of my experiences in this developing field, culminating with my appointment as the first Sociologist to become a Professor of Epidemiology in a School of Public Health.
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- 2005
64. Social and Economic Disparities in Health: Thoughts about Intervention
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Syme, S. Leonard
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- 1998
65. Infectious disease and cognition in wild populations
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Andrea K. Townsend, Kendra B. Sewall, Anne S. Leonard, and Dana M. Hawley
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Cognition ,Animals ,Animals, Wild ,Communicable Diseases ,Ecology, Evolution, Behavior and Systematics - Abstract
Infectious disease is linked to impaired cognition across a breadth of host taxa and cognitive abilities, potentially contributing to variation in cognitive performance within and among populations. Impaired cognitive performance can stem from direct damage by the parasite, the host immune response, or lost opportunities for learning. Moreover, cognitive impairment could be compounded by factors that simultaneously increase infection risk and impair cognition directly, such as stress and malnutrition. As highlighted in this review, however, answers to fundamental questions remain unresolved, including the frequency, duration, and fitness consequences of infection-linked cognitive impairment in wild animal populations, the cognitive abilities most likely to be affected, and the potential for adaptive evolution of cognition in response to accelerating emergence of infectious disease.
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- 2022
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66. In vivo and in vitro toxicity of a stainless-steel aerosol generated during thermal spray coating
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Vamsi Kodali, Aliakbar Afshari, Terence Meighan, Walter McKinney, Md Habibul Hasan Mazumder, Nairrita Majumder, Jared L. Cumpston, Howard D. Leonard, James B. Cumpston, Sherri Friend, Stephen S. Leonard, Aaron Erdely, Patti C. Zeidler-Erdely, Salik Hussain, Eun Gyung Lee, and James M. Antonini
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Male ,Inflammation ,Inhalation Exposure ,Health, Toxicology and Mutagenesis ,NF-kappa B ,Respiratory Aerosols and Droplets ,Dust ,Air Pollutants, Occupational ,General Medicine ,Stainless Steel ,Toxicology ,Actins ,Clathrin ,Rats ,Transcription Factor AP-1 ,Rats, Sprague-Dawley ,Animals ,Cytokines ,Welding ,Lung - Abstract
Thermal spray coating is an industrial process in which molten metal is sprayed at high velocity onto a surface as a protective coating. An automated electric arc wire thermal spray coating aerosol generator and inhalation exposure system was developed to simulate an occupational exposure and, using this system, male Sprague-Dawley rats were exposed to stainless steel PMET720 aerosols at 25 mg/msup3/sup × 4 h/day × 9 day. Lung injury, inflammation, and cytokine alteration were determined. Resolution was assessed by evaluating these parameters at 1, 7, 14 and 28 d after exposure. The aerosols generated were also collected and characterized. Macrophages were exposed in vitro over a wide dose range (0-200 µg/ml) to determine cytotoxicity and to screen for known mechanisms of toxicity. Welding fumes were used as comparative particulate controls. In vivo lung damage, inflammation and alteration in cytokines were observed 1 day post exposure and this response resolved by day 7. Alveolar macrophages retained the particulates even after 28 day post-exposure. In line with the pulmonary toxicity findings, in vitro cytotoxicity and membrane damage in macrophages were observed only at the higher doses. Electron paramagnetic resonance showed in an acellular environment the particulate generated free radicals and a dose-dependent increase in intracellular oxidative stress and NF-kB/AP-1 activity was observed. PMET720 particles were internalized via clathrin and caveolar mediated endocytosis as well as actin-dependent pinocytosis/phagocytosis. The results suggest that compared to stainless steel welding fumes, the PMET 720 aerosols were not as overtly toxic, and the animals recovered from the acute pulmonary injury by 7 days.
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- 2022
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67. Erosional and Tectonic Evolution of a Retroarc Orogenic Wedge as Revealed by Sedimentary Provenance: Case of the Oligocene – Miocene Patagonian Andes
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Joel S. Leonard, Julie C. Fosdick, and Rebecca A. VanderLeest
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foreland basins ,sedimentary provenance ,patagonian andes ,magallanes-austral basin ,cenozoic ,Science - Abstract
Sedimentary provenance techniques have been widely applied in foreland basin settings to understand tectonic and magmatic processes by tracking the exposure and erosion of distinct sediment source areas through time. We present a case example from the Magallanes-Austral retroarc foreland basin of Chile and Argentina (51°30’S), where modal sandstone and conglomerate compositional data, detrital zircon U-Pb geochronology, and sedimentology data from the Oligocene-Miocene Río Guillermo Formation document a change in source areas during an important stage of orogenic development. In particular, our results from the ∼24.3–21.7 Ma Río Guillermo Formation record an abrupt shift from transitional to undissected arc provenance that indicate rejuvenated magmatism within the contemporary arc. Minor components of lithic grains suggest a subordinate source of recycled sediments that we interpret may have been derived from the intervening external fold-and-thrust belt, rather than directly from sources in the hinterland thrust domain. Detrital zircon U-Pb geochronology data show mostly Neogene (∼20–40 Ma) and Cretaceous (∼70–110 Ma) age groups, with minor amounts of Jurassic (∼145–155 Ma), and Paleozoic (∼260–540 Ma) age groups, which are consistent with a syndepositional arc and recycled external fold-and-thrust belt sources. Stratigraphic data suggest a vegetated, channelized braidplain environment developed above an erosional unconformity with the underlying shallow-marine Río Turbio Formation. Upsection, the Río Guillermo Formation locally transitions to a low-energy, organic-rich floodplain setting located within the upper reaches of a fluvial-tidal transition zone of the coastal plain, and the uppermost part of the formation is characterized by a coarse-grained sandy channelized braidplain environment along the foreland basin margin. Moderate sediment accumulation rates and coastal plain progradation during this period is consistent with sustained sediment flux from the Patagonian Andes and tectonic subsidence along the basin margin. Taken collectively, we propose that the abrupt provenance shift dominantly records erosion of the rejuvenated mafic volcanic arc, despite coeval changes in orogenic wedge dynamics brought about by increased plate convergence rates that drove uplift of the intervening external-fold-and-thrust belt along reactivated deep-seated high-angle basin structures.
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- 2020
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68. Evolution of interface binding strengths in simplified model of protein quaternary structure.
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Alexander S Leonard and Sebastian E Ahnert
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Biology (General) ,QH301-705.5 - Abstract
The self-assembly of proteins into protein quaternary structures is of fundamental importance to many biological processes, and protein misassembly is responsible for a wide range of proteopathic diseases. In recent years, abstract lattice models of protein self-assembly have been used to simulate the evolution and assembly of protein quaternary structure, and to provide a tractable way to study the genotype-phenotype map of such systems. Here we generalize these models by representing the interfaces as mutable binary strings. This simple change enables us to model the evolution of interface strengths, interface symmetry, and deterministic assembly pathways. Using the generalized model we are able to reproduce two important results established for real protein complexes: The first is that protein assembly pathways are under evolutionary selection to minimize misassembly. The second is that the assembly pathway of a complex mirrors its evolutionary history, and that both can be derived from the relative strengths of interfaces. These results demonstrate that the generalized lattice model offers a powerful new idealized framework to facilitate the study of protein self-assembly processes and their evolution.
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- 2019
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69. Engaging youth in communities: a framework for promoting adolescent and community health
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Ballard, Parissa J and Syme, S Leonard
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- 2016
70. Obstetricians’ prescribing practices for pain management after delivery
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A Dhanya Mackeen, Richard S Vigh, Lisa Bailey Davis, Mohamed Satti, Nicole Cumbo, Abigail M Pauley, Krista S Leonard, Mark Stephens, Tammy E Corr, RW Roeser, Timothy Deimling, Richard S Legro, Jaimey M Pauli, and Danielle Symons Downs
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Analgesics, Opioid ,Physicians ,Humans ,Pain ,Pain Management ,Female ,General Medicine ,Analgesics, Non-Narcotic ,Practice Patterns, Physicians' ,Drug Prescriptions ,Research Article - Abstract
We wanted to look at the way opioid pain drugs are provided to mothers after the birth of their children and see what doctors tell mothers about the pain drugs. We interviewed doctors and asked which opioid pain drug they would choose, what made them prescribe the drug, the thoughts about giving mothers the drug and what they told the mothers about the drug. We then looked at all the responses to look for patterns in how doctors gave pain drugs to mothers. Our team interviewed 38 doctors. Some key points were seen; first is that the choice of opioid pain drug, dose and number of pills prescribed was different from doctor to doctor; second is that whether the baby was delivered vaginally or by cesarean was the main factor upon which doctors based their decisions for giving opioid pain drugs. Whether a mother was taking medications that help with addiction, the doctor’s assessment of the mother’s pain and the doctor’s thoughts on the mother’s risk of opioid addiction were also considered. All doctors would give opioid pain drugs to breastfeeding mothers. Finally, some doctors talked to mothers about using other medications for pain, but not about the overuse of opioid pain drugs. At our two hospital centers in Pennsylvania, the 38 doctors gave opioid pain drugs to mothers in 38 different ways. Doctors said that opioids are necessary after cesarean, but not after vaginal birth, unless there is a problem. A mother’s history and social situation inform decision making. Doctors talk to mothers about short-term pain, but not about the overuse of opioid pain drugs.
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- 2022
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71. Low prenatal resting energy expenditure and high energy intake predict high gestational weight gain in pregnant women with overweight/obesity
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Krista S, Leonard and Danielle, Symons Downs
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Nutrition and Dietetics ,Pregnancy ,Endocrinology, Diabetes and Metabolism ,Humans ,Female ,Obesity ,Pregnant Women ,Overweight ,Energy Intake ,Energy Metabolism ,Gestational Weight Gain ,Body Mass Index - Abstract
Recent evidence suggests that low resting energy expenditure (REE) is associated with gestational weight gain (GWG). However, little research has examined whether REE explains GWG beyond the contributions of energy intake (EI) and physical activity (PA). This study examined the extent to which EI, PA, and REE were associated with and explained second trimester GWG in pregnant women with overweight/obesity.Pregnant women with overweight/obesity (N = 26) participating in the Healthy Mom Zone study, a theoretically-based behavioral intervention that adapted the intervention dosage over time to regulate GWG completed weekly point estimates of EI (back-calculation), PA (wrist-worn activity monitor), and REE (mobile metabolism device) from 14- to 28-weeks gestation. Second trimester GWG was calculated as the weekly point estimate of weight from a Wi-Fi weight scale at gestational week 28 minus the weekly point estimate of weight at gestational week 14.Partial correlations revealed second trimester EI and PA were not significantly associated with second trimester GWG, but low second trimester REE was significantly associated with high second trimester GWG. Hierarchical regression analyses showed the model of fat-free mass, EI, PA, and REE explained 56% of the variance in second trimester GWG. Low REE was the strongest determinant followed by high EI; fat-free mass and PA were not significant predictors.While EI and PA remain important determinants of GWG, future researchers should explore the role of REE to inform individualized EI and PA goals to better regulate GWG.
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- 2022
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72. Characteristics associated with self-rated health in the CARDIA study: Contextualising health determinants by income group
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Shilpa Nayak, Alan Hubbard, Stephen Sidney, and S. Leonard Syme
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Medicine - Abstract
An understanding of factors influencing health in socioeconomic groups is required to reduce health inequalities. This study investigated combinations of health determinants associated with self-rated health (SRH), and their relative importance, in income-based groups.Cross-sectional data from year 15 (2000−2001) of the CARDIA study (Coronary Artery Risk Development in Young Adults, USA) - 3648 men and women (mean 40 years) - were split into 5 income-based groups. SRH responses were categorized as ‘higher’/‘lower’. Health determinants (medical, lifestyle, and social factors, living conditions) associated with SRH in each group were analyzed using classification tree analysis (CTA).Income and SRH were positively associated (p
- Published
- 2016
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73. A new stepwise carbon cycle data assimilation system using multiple data streams to constrain the simulated land surface carbon cycle
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P. Peylin, C. Bacour, N. MacBean, S. Leonard, P. Rayner, S. Kuppel, E. Koffi, A. Kane, F. Maignan, F. Chevallier, P. Ciais, and P. Prunet
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Geology ,QE1-996.5 - Abstract
Large uncertainties in land surface models (LSMs) simulations still arise from inaccurate forcing, poor description of land surface heterogeneity (soil and vegetation properties), incorrect model parameter values and incomplete representation of biogeochemical processes. The recent increase in the number and type of carbon cycle-related observations, including both in situ and remote sensing measurements, has opened a new road to optimize model parameters via robust statistical model–data integration techniques, in order to reduce the uncertainties of simulated carbon fluxes and stocks. In this study we present a carbon cycle data assimilation system that assimilates three major data streams, namely the Moderate Resolution Imaging Spectroradiometer (MODIS)-Normalized Difference Vegetation Index (NDVI) observations of vegetation activity, net ecosystem exchange (NEE) and latent heat (LE) flux measurements at more than 70 sites (FLUXNET), as well as atmospheric CO2 concentrations at 53 surface stations, in order to optimize the main parameters (around 180 parameters in total) of the Organizing Carbon and Hydrology in Dynamics Ecosystems (ORCHIDEE) LSM (version 1.9.5 used for the Coupled Model Intercomparison Project Phase 5 (CMIP5) simulations). The system relies on a stepwise approach that assimilates each data stream in turn, propagating the information gained on the parameters from one step to the next. Overall, the ORCHIDEE model is able to achieve a consistent fit to all three data streams, which suggests that current LSMs have reached the level of development to assimilate these observations. The assimilation of MODIS-NDVI (step 1) reduced the growing season length in ORCHIDEE for temperate and boreal ecosystems, thus decreasing the global mean annual gross primary production (GPP). Using FLUXNET data (step 2) led to large improvements in the seasonal cycle of the NEE and LE fluxes for all ecosystems (i.e., increased amplitude for temperate ecosystems). The assimilation of atmospheric CO2, using the general circulation model (GCM) of the Laboratoire de Météorologie Dynamique (LMDz; step 3), provides an overall constraint (i.e., constraint on large-scale net CO2 fluxes), resulting in an improvement of the fit to the observed atmospheric CO2 growth rate. Thus, the optimized model predicts a land C (carbon) sink of around 2.2 PgC yr−1 (for the 2000–2009 period), which is more compatible with current estimates from the Global Carbon Project (GCP) than the prior value. The consistency of the stepwise approach is evaluated with back-compatibility checks. The final optimized model (after step 3) does not significantly degrade the fit to MODIS-NDVI and FLUXNET data that were assimilated in the first two steps, suggesting that a stepwise approach can be used instead of the more “challenging” implementation of a simultaneous optimization in which all data streams are assimilated together. Most parameters, including the scalar of the initial soil carbon pool size, changed during the optimization with a large error reduction. This work opens new perspectives for better predictions of the land carbon budgets.
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- 2016
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74. The Last Glacial Maximum in the central North Island, New Zealand: palaeoclimate inferences from glacier modelling
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S. R. Eaves, A. N. Mackintosh, B. M. Anderson, A. M. Doughty, D. B. Townsend, C. E. Conway, G. Winckler, J. M. Schaefer, G. S. Leonard, and A. T. Calvert
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Environmental pollution ,TD172-193.5 ,Environmental protection ,TD169-171.8 ,Environmental sciences ,GE1-350 - Abstract
Quantitative palaeoclimate reconstructions provide data for evaluating the mechanisms of past, natural climate variability. Geometries of former mountain glaciers, constrained by moraine mapping, afford the opportunity to reconstruct palaeoclimate, due to the close relationship between ice extent and local climate. In this study, we present results from a series of experiments using a 2-D coupled energy balance–ice flow model that investigate the palaeoclimate significance of Last Glacial Maximum moraines within nine catchments in the central North Island, New Zealand. We find that the former ice limits can be simulated when present-day temperatures are reduced by between 4 and 7 °C, if precipitation remains unchanged from present. The spread in the results between the nine catchments is likely to represent the combination of chronological and model uncertainties. The majority of catchments targeted require temperature decreases of 5.1 to 6.3 °C to simulate the former glaciers, which represents our best estimate of the temperature anomaly in the central North Island, New Zealand, during the Last Glacial Maximum. A decrease in precipitation of up to 25 % from present, as suggested by proxy evidence and climate models, increases the magnitude of the required temperature changes by up to 0.8 °C. Glacier model experiments using reconstructed topographies that exclude the volume of post-glacial (
- Published
- 2016
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75. A neonicotinoid pesticide alters how nectar chemistry affects bees
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Sarah K. Richman, Isabelle M. Maalouf, Angela M. Smilanich, Denyse Marquez Sanchez, Sharron Z. Miller, and Anne S. Leonard
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Ecology, Evolution, Behavior and Systematics - Published
- 2022
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76. The compositional diversity and temporal evolution of an active andesitic arc stratovolcano: Tongariro, Taupō Volcanic Zone, New Zealand
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Leo R. Pure, Colin J. N. Wilson, Bruce L. A. Charlier, John A. Gamble, Dougal B. Townsend, and Graham S. Leonard
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Geophysics ,Geochemistry and Petrology - Abstract
New geochemical data, including Sr–Nd–Pb isotopes for whole-rock and groundmass samples, are reported for edifice-forming eruptives at Tongariro volcano, New Zealand, which span its ~ 350 ka to late Holocene history. Tongariro eruptives are medium-K basaltic-andesites to dacites (53.0–66.2 wt% SiO2) that evolved via assimilation-fractional crystallisation (AFC) processes partly or mostly in the uppermost 15 km of the crust. When ordered chronologically using a high-resolution 40Ar/39Ar-dated eruptive stratigraphy, the compositional data show systematic 10–130 kyr cycles. Mafic replenishment events inferred from MgO values occurred at ~ 230, ~ 151, ~ 88 and ~ 56 ka and in the late Holocene, with high-MgO flank vents erupting at ~ 160, ~ 117, ~ 35 and ~ 17.5 ka. Cycles in Sm/Nd, 87Sr/86Sr, 143Nd/144Nd and Pb isotopic ratios, which are decoupled from MgO, K2O and Rb/Sr cycles, indicate periods of prolonged crustal residence of magmas from ~ 230 to ~ 100 ka and ~ 95 to ~ 30 ka. AFC modelling shows that intermediate and silicic melt compositions, with r-values between 0.1 and 1, are needed to reproduce Tongariro compositional arrays. AFC models also indicate that ~ 20% of the average Tongariro magma comprises assimilated (meta)sedimentary basement material. Locally, Tongariro and adjacent Ruapehu volcanoes attain their most crust-like 87Sr/86Sr and 143Nd/144Nd compositions at ~ 100 and ~ 30 ka, paralleling with zircon model-age crystallisation modes at the rhyolitic Taupō volcano ~ 50 km to the NNE. These coincidences suggest that the timing and tempo of magma assembly processes at all three volcanoes were contemporaneous and may have been tectonically influenced since at least 200 ka.
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- 2023
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77. Exploiting public databases of genomic variation to quantify evolutionary constraint on the branch point sequence in 30 plant and animal species
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Adéla Nosková, Chao Li, Xiaolong Wang, Alexander S. Leonard, Hubert Pausch, and Naveen Kumar Kadri
- Abstract
The branch point sequence is a degenerate intronic heptamer required for the assembly of the spliceosome during pre-mRNA splicing. Disruption of this motif may promote alternative splicing and eventually cause phenotype variation. Despite its functional relevance, the branch point sequence is not included in most genome annotations. Here, we predict branch point sequences in 30 plant and animal species and attempt to quantify their evolutionary constraints using public variant databases. We find an implausible variant distribution in the databases from 16 of 30 examined species. Comparative analysis of variants from whole-genome sequencing shows that biased or erroneous variants that are widespread in public databases cause these irregularities. We then investigate evolutionary constraint with largely unbiased public variant databases in 14 species and find that the fourth and sixth position of the branch point sequence are more constrained than coding nucleotides. Our findings show that public variant databases should be scrutinized for possible biases before they qualify to analyze evolutionary constraint.
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- 2023
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78. Pollen Protein: Lipid Macronutrient Ratios May Guide Broad Patterns of Bee Species Floral Preferences
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Anthony D. Vaudo, John F. Tooker, Harland M. Patch, David J. Biddinger, Michael Coccia, Makaylee K. Crone, Mark Fiely, Jacob S. Francis, Heather M. Hines, Mackenzie Hodges, Stephanie W. Jackson, Denis Michez, Junpeng Mu, Laura Russo, Maliheh Safari, Erin D. Treanore, Maryse Vanderplanck, Eric Yip, Anne S. Leonard, and Christina M. Grozinger
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bee health ,floral rewards ,nutritional ecology ,pollen foraging behavior ,pollination ecology ,plant–pollinator interactions ,Science - Abstract
Pollinator nutritional ecology provides insights into plant−pollinator interactions, coevolution, and the restoration of declining pollinator populations. Bees obtain their protein and lipid nutrient intake from pollen, which is essential for larval growth and development as well as adult health and reproduction. Our previous research revealed that pollen protein to lipid ratios (P:L) shape bumble bee foraging preferences among pollen host-plant species, and these preferred ratios link to bumble bee colony health and fitness. Yet, we are still in the early stages of integrating data on P:L ratios across plant and bee species. Here, using a standard laboratory protocol, we present over 80 plant species’ protein and lipid concentrations and P:L values, and we evaluate the P:L ratios of pollen collected by three bee species. We discuss the general phylogenetic, phenotypic, behavioral, and ecological trends observed in these P:L ratios that may drive plant−pollinator interactions; we also present future research questions to further strengthen the field of pollination nutritional ecology. This dataset provides a foundation for researchers studying the nutritional drivers of plant−pollinator interactions as well as for stakeholders developing planting schemes to best support pollinators.
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- 2020
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79. ROS generation is involved in titanium dioxide nanoparticle‐induced AP‐1 activation through p38 MAPK and ERK pathways in JB6 cells
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Joni Aldinger, Min Ding, Stephen S. Leonard, Lu Kong, Jinshun Zhao, Tabatha Barber, and Linda Bowman
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MAPK/ERK pathway ,MAP Kinase Signaling System ,Health, Toxicology and Mutagenesis ,p38 mitogen-activated protein kinases ,Management, Monitoring, Policy and Law ,Toxicology ,p38 Mitogen-Activated Protein Kinases ,Article ,Mice ,Animals ,Neoplastic transformation ,Extracellular Signal-Regulated MAP Kinases ,Titanium ,chemistry.chemical_classification ,Reactive oxygen species ,Cell growth ,Activator (genetics) ,Kinase ,JNK Mitogen-Activated Protein Kinases ,General Medicine ,Rats ,Cell biology ,Transcription Factor AP-1 ,chemistry ,Nanoparticles ,Signal transduction ,Reactive Oxygen Species - Abstract
Titanium dioxide (TiO(2)) is generally regarded as a nontoxic and nongenotoxic white mineral, which is mainly applied in the manufacture of paper, paint, plastic, sunscreen lotion and other products. Recently, TiO(2) nanoparticles (TiO(2) NPs) have been demonstrated to cause chronic inflammation and lung tumor formation in rats, which may be associated with the particle size of TiO(2). Considering the important role of activator protein-1 (AP-1) in regulating multiple genes involved in the cell proliferation and inflammation and the induction of neoplastic transformation, we aimed to evaluate the potency of TiO(2) NPs (≤ 20 nm) on the activation of AP-1 signaling pathway and the generation of reactive oxygen species (ROS) in a mouse epidermal cell line, JB6 cells. MTT, electron spin resonance (ESR), AP-1 luciferase activity assay in vitro and in vivo, and Western blotting assay were used to clarify this problem. Our results indicated that TiO(2) NPs dose-dependently caused the hydroxyl radical (·OH) generation and sequentially increased the AP-1 activity in JB6 cells. Using AP-1-luciferase reporter transgenic mice models, an obvious increased AP-1 activity was detected in dermal tissue after exposure to TiO(2) NPs for 24 h. Interestingly, TiO(2) NPs increased the AP-1 activity via stimulating the expression of mitogen-activated protein kinases (MAPKs) family members, including extracellular signal-regulated protein kinases (ERKs), p38 kinase, and C-Jun N-terminal kinases (JNKs). Of note, the AP-1 activation induced by TiO(2) NPs could be blocked by specific inhibitors (SB203580, PD98059, and SP 600125, respectively) that inhibit ERKs and p38 kinase but not JNKs. These findings indicate that ROS generation is involved in TiO(2) NPs-induced AP-1 activation mediated by MAPKs signal pathway.
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- 2021
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80. Octopamine affects gustatory responsiveness and may enhance learning in bumble bees
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Felicity Muth, Emily Breslow, and Anne S. Leonard
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Insect Science - Published
- 2023
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81. Sensing Volatile Organic Compounds in Aqueous Solutions Using Ir780-Based Gumbos
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Caitlan E. Ayala, Stephanie R. Vaughan, Rocío L. Pérez, Breona S. Leonard, Baleigh King, Kyle Jorgensen, and Isiah M. Warner
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- 2023
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82. Markhor-derived Introgression of a Genomic Region Encompassing PAPSS2 Confers High-altitude Adaptability in Tibetan Goats
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Chao Li, Yujiang Wu, Bingchun Chen, Yudong Cai, Jiazhong Guo, Alexander S Leonard, Peter Kalds, Shiwei Zhou, Jingchen Zhang, Ping Zhou, Shangqu Gan, Ting Jia, Tianchun Pu, Langda Suo, Yan Li, Ke Zhang, Lan Li, Myagmarsuren Purevdorj, Xihong Wang, Ming Li, Yu Wang, Yao Liu, Shuhong Huang, Tad Sonstegard, Ming-Shan Wang, Stephen Kemp, Hubert Pausch, Yulin Chen, Jian-Lin Han, Yu Jiang, and Xiaolong Wang
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High altitude ,Goat ,Genetics ,Genomics ,Hypoxia ,Genetic introgression ,Molecular Biology ,Environmental adaptation ,Ecology, Evolution, Behavior and Systematics - Abstract
Understanding the genetic mechanism of how animals adapt to extreme conditions is fundamental to determine the relationship between molecular evolution and changing environments. Goat is one of the first domesticated species and has evolved rapidly to adapt to diverse environments, including harsh high-altitude conditions with low temperature and poor oxygen supply but strong ultraviolet radiation. Here, we analyzed 331 genomes of domestic goats and wild caprid species living at varying altitudes (high > 3000 m above sea level and low, Molecular Biology and Evolution, 39 (12), ISSN:0737-4038, ISSN:1537-1719
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- 2022
83. The association between a living wage and subjective social status and self-rated health: A quasi-experimental study in the Dominican Republic
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Landefeld, John C., Burmaster, Katharine B., Rehkopf, David H., Syme, S. Leonard, Lahiff, Maureen, Adler-Milstein, Sarah, and Fernald, Lia C.H.
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- 2014
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84. Creating Performance Environments: Technology, Design and Patience
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S. Leonard Auerbach
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Engineering ,Engineering management ,Las vegas ,Visual Arts and Performing Arts ,business.industry ,media_common.quotation_subject ,Architecture ,Request for proposal ,Patience ,business ,Greeks ,media_common ,Design technology - Published
- 2021
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85. Gestational Weight Gain Intervention Impacts Determinants of Healthy Eating and Exercise in Overweight/Obese Pregnant Women
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Abigail M. Pauley, Emily Hohman, Jennifer S. Savage, Daniel E. Rivera, Penghong Guo, Krista S. Leonard, and Danielle Symons Downs
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Internal medicine ,RC31-1245 - Abstract
High gestational weight gain (GWG) in overweight/obese pregnant women increases maternal-fetal complications. We conducted a 6-week GWG intervention based on an energy balance model that includes theories of planned behavior (TPB) and self-regulation constructs to promote exercise and healthy eating motivation and behaviors. The purposes of this proof-of-concept feasibility study were to examine: (1) the energy balance model constructs over the intervention, and (2) pre-post intervention, weekly, and dose-response changes in study constructs. Methods. Overweight/obese pregnant women (N=17) were randomized to 1 of 6 conditions, increasing in intensity, and included varied combinations of components (exercise sessions, healthy eating demonstrations, etc.). Exercise and healthy eating TPB (attitude, subjective norm, perceived behavioral control, intention), and self-regulation (prospective, retrospective) constructs were collected weekly. Exercise behavior, energy intake, and GWG were collected daily. Results. We observed: (a) significant increases in exercise TPB constructs, healthy eating attitude (limit unhealthy foods), exercise/healthy eating retrospective self-regulation; (b) significant decrease in healthy eating subjective norm (limit unhealthy foods); (c) trending increases for healthy eating perceived behavioral control (limit unhealthy foods), healthy eating prospective self-regulation, and energy intake; (d) significantly higher active time, steps, and energy expenditure at W3 relative to other weeks; (e) no significant increase in GWG; and, (f) a dose response effect such that women in more intensive dosages had greater gains in exercise and healthy eating perceived behavioral control (eat healthy/limit unhealthy foods). Conclusion. Brief exposure to a theoretically-driven, GWG intervention resulted in changes to exercise and healthy eating TPB and self-regulation motivational determinants, no significant increase in GWG, and suggests intervention intensity can strengthen perceived ability to engage in exercise/healthy eating behaviors; offering initial proof-of-concept for the intervention to regulate GWG in overweight/obese pregnant women. Future research will test this intervention over the course of pregnancy to understand long-term impact on maternal-fetal health outcomes.
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- 2018
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86. The Battle of Worldviews: A Case Study of Liver Fluke Infection in Khon Kaen, Thailand
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Sara Samiphak PhD and S. Leonard Syme PhD
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Other systems of medicine ,RZ201-999 ,Homeopathy ,RX1-681 - Abstract
Control efforts to reduce infection from the parasitic flatworm Opisthorchis viverrini have progressed through understanding the epidemiology of Opisthorchis viverrini , antiparasitic drug developments, technological innovations, health education promoting cooking of fish, and improved hygienic defecation. Yet the problem persists. The case study method was used to examine the fundamental cause of the liver fluke infection problem. Evidence shows that the liver fluke–infected population does not care about living a long life. For them, suffering and death are simply a part of life, and expected. Thus, the cause(s) leading to death is not important. They believe morally bad actions, and predetermined fate associated with kamma in Buddhism, play a big role whether or not one is infected with the liver fluke. Health interventions may be made more effective if they take into account the liver fluke–infected population’s worldviews about ethics, morality, life, and death. We researchers should not feel concerned only about medically determined causes of death.
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- 2017
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87. A Review of the Tools Used for Marine Monitoring in the UK: Combining Historic and Contemporary Methods with Modeling and Socioeconomics to Fulfill Legislative Needs and Scientific Ambitions
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Tim P. Bean, Naomi Greenwood, Rachel Beckett, Lauren Biermann, John P. Bignell, Jan L. Brant, Gordon H. Copp, Michelle J. Devlin, Stephen Dye, Stephen W. Feist, Liam Fernand, Dean Foden, Kieran Hyder, Chris M. Jenkins, Jeroen van der Kooij, Silke Kröger, Sven Kupschus, Clare Leech, Kinson S. Leonard, Christopher P. Lynam, Brett P. Lyons, Thomas Maes, E. E. Manuel Nicolaus, Stephen J. Malcolm, Paul McIlwaine, Nathan D. Merchant, Lucille Paltriguera, David J. Pearce, Sophie G. Pitois, Paul D. Stebbing, Bryony Townhill, Suzanne Ware, Oliver Williams, and David Righton
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UK ,sensors ,ecosystem ,modeling ,research vessel ,OSPAR ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
Marine environmental monitoring is undertaken to provide evidence that environmental management targets are being met. Moreover, monitoring also provides context to marine science and over the last century has allowed development of a critical scientific understanding of the marine environment and the impacts that humans are having on it. The seas around the UK are currently monitored by targeted, impact-driven, programmes (e.g., fishery or pollution based monitoring) often using traditional techniques, many of which have not changed significantly since the early 1900s. The advent of a new wave of automated technology, in combination with changing political and economic circumstances, means that there is currently a strong drive to move toward a more refined, efficient, and effective way of monitoring. We describe the policy and scientific rationale for monitoring our seas, alongside a comprehensive description of the types of equipment and methodology currently used and the technologies that are likely to be used in the future. We contextualize the way new technologies and methodologies may impact monitoring and discuss how whole ecosystems models can give an integrated, comprehensive approach to impact assessment. Furthermore, we discuss how an understanding of the value of each data point is crucial to assess the true costs and benefits to society of a marine monitoring programme.
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- 2017
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88. Influence of Impurities from Manufacturing Process on the Toxicity Profile of Boron Nitride Nanotubes
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Vamsi Kodali, Keun Su Kim, Jenny R. Roberts, Lauren Bowers, Michael G. Wolfarth, John Hubczak, Xing Xin, Tracy Eye, Sherri Friend, Aleksandr B. Stefaniak, Stephen S. Leonard, Michael Jakubinek, and Aaron Erdely
- Subjects
Biomaterials ,General Materials Science ,General Chemistry ,Biotechnology - Abstract
The toxicity of boron nitride nanotubes (BNNTs) has been the subject of conflicting reports, likely due to differences in the residuals and impurities that can make up to 30-60% of the material produced based on the manufacturing processes and purification employed. Four BNNTs manufactured by induction thermal plasma process with a gradient of BNNT purity levels achieved through sequential gas purification, water and solvent washing, allowed assessing the influence of these residuals/impurities on the toxicity profile of BNNTs. Extensive characterization including infrared and X-ray spectroscopy, thermogravimetric analysis, size, charge, surface area, and density captured the alteration in physicochemical properties as the material went through sequential purification. The material from each step is screened using acellular and in vitro assays for evaluating general toxicity, mechanisms of toxicity, and macrophage function. As the material increased in purity, there are more high-aspect-ratio particulates and a corresponding distinct increase in cytotoxicity, nuclear factor-κB transcription, and inflammasome activation. There is no alteration in macrophage function after BNNT exposure with all purity grades. The cytotoxicity and mechanism of screening clustered with the purity grade of BNNTs, illustrating that greater purity of BNNT corresponds to greater toxicity.
- Published
- 2022
89. Efficacies and Second-Year Effects of SPLAT GM™ and SPLAT GM™ Organic Formulations
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Ksenia S. Onufrieva, Andrea D. Hickman, Donna S. Leonard, and Patrick C. Tobin
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gypsy moth ,pheromone ,disparlure ,persistence ,second-year effect ,Science - Abstract
Mating disruption is the primary control tactic used against the gypsy moth, Lymantria dispar (L.) (Lepidoptera: Lymantriidae) under the gypsy moth Slow the Spread (STS) program. In this paper, we present the results of the multiyear study designed to evaluate a new liquid SPLAT GM™ (ISCA Tech, Riverside, CA, USA) Organic formulation, which is approved by the USDA to meet National Organic Program Standards for use in organic certified farms, for its ability to disrupt gypsy moth mating, and to evaluate the environmental persistence of SPLAT GM™ and SPLAT GM™ Organic formulations. Environmental persistence of the pheromone beyond the year of application is a significant concern since STS relies on trap catch data to evaluate treatment success. The study was conducted in 2007–2012 in forested areas in Virginia and Wisconsin, USA. We observed that SPLAT GM™ Organic reduced gypsy moth trap catch by ≥90% for 10 weeks in a similar manner as SPLAT GM™ and Hercon Disrupt® II (Hercon Environmental, Emigsville, PA, USA). Although we observed persistent effects in all products one year after application, the persistence observed in SPLAT GM™ and SPLAT GM™ Organic was significantly lower than that of Hercon Disrupt® II plastic laminated flakes.
- Published
- 2014
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90. Generation of Reactive Oxygen Species from Silicon Nanowires
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Stephen S. Leonard, Guy M. Cohen, Allison J. Kenyon, Diane Schwegler-Berry, Natalie R. Fix, Sarunya Bangsaruntip, and Jenny R. Roberts
- Subjects
Environmental sciences ,GE1-350 ,Public aspects of medicine ,RA1-1270 - Published
- 2014
91. Variable population exposure and distributed travel speeds in least-cost tsunami evacuation modelling
- Author
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S. A. Fraser, N. J. Wood, D. M. Johnston, G. S. Leonard, P. D. Greening, and T. Rossetto
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Environmental technology. Sanitary engineering ,TD1-1066 ,Geography. Anthropology. Recreation ,Environmental sciences ,GE1-350 ,Geology ,QE1-996.5 - Abstract
Evacuation of the population from a tsunami hazard zone is vital to reduce life-loss due to inundation. Geospatial least-cost distance modelling provides one approach to assessing tsunami evacuation potential. Previous models have generally used two static exposure scenarios and fixed travel speeds to represent population movement. Some analyses have assumed immediate departure or a common evacuation departure time for all exposed population. Here, a method is proposed to incorporate time-variable exposure, distributed travel speeds, and uncertain evacuation departure time into an existing anisotropic least-cost path distance framework. The method is demonstrated for hypothetical local-source tsunami evacuation in Napier City, Hawke's Bay, New Zealand. There is significant diurnal variation in pedestrian evacuation potential at the suburb level, although the total number of people unable to evacuate is stable across all scenarios. Whilst some fixed travel speeds approximate a distributed speed approach, others may overestimate evacuation potential. The impact of evacuation departure time is a significant contributor to total evacuation time. This method improves least-cost modelling of evacuation dynamics for evacuation planning, casualty modelling, and development of emergency response training scenarios. However, it requires detailed exposure data, which may preclude its use in many situations.
- Published
- 2014
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92. Evaluation of the Pulmonary Toxicity of a Fume Generated from a Nickel-, Copper-Based Electrode to be Used as a Substitute in Stainless Steel Welding
- Author
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James M. Antonini, Melissa A. Badding, Terence G. Meighan, Michael Keane, Stephen S. Leonard, and Jenny R. Roberts
- Subjects
Environmental sciences ,GE1-350 ,Public aspects of medicine ,RA1-1270 - Published
- 2014
93. Measuring foraging preferences in bumble bees: a comparison of popular laboratory methods and a test for sucrose preferences following neonicotinoid exposure
- Author
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Sarah K. Richman, Anne S. Leonard, and Felicity Muth
- Subjects
Laboratory methods ,biology ,business.industry ,fungi ,Foraging ,Neonicotinoid ,Nutritional quality ,biology.organism_classification ,Preference ,Bombus impatiens ,Biotechnology ,Nectar ,Experimental methods ,business ,Ecology, Evolution, Behavior and Systematics - Abstract
Animals develop food preferences based on taste, nutritional quality and to avoid environmental toxins. Yet, measuring preferences in an experimental setting can be challenging since ecologically realistic assays can be time consuming, while simplified assays may not capture natural sampling behavior. Field realism is a particular challenge when studying behavioral responses to environmental toxins in lab-based assays, given that toxins can themselves impact sampling behavior, masking our ability to detect preferences. We address these challenges by comparing different experimental methods for measuring sucrose concentration preference in bumble bees (Bombus impatiens), evaluating the utility of two preference chamber-based methods (ad libitum versus a novel restricted-sampling assay) in replicating bees' preferences when they fly freely between artificial flowers in a foraging arena. We find that the restricted-sampling method matched a free-flying scenario more closely than the ad libitum protocol, and we advocate for expanded use of this approach, given its ease of implementation. We then performed a second experiment using the new protocol to ask whether consuming the neonicotinoid pesticide imidacloprid, known to suppress feeding motivation, interfered with the expression of sucrose preferences. After consuming imidacloprid, bees were less likely to choose the higher-quality sucrose even as they gained experience with both options. Thus, we provide evidence that pesticides interfere with bees' ability to discriminate between floral rewards that differ in value. This work highlights a simple protocol for assessing realistic foraging preferences in bees and provides an efficient way for researchers to measure the impacts of anthropogenic factors on preference expression.
- Published
- 2021
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- View/download PDF
94. Land prices and railroad building in European Russia, 1860s to the early 1900s
- Author
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Roman B. Konchakov, Carol S. Leonard, Zafar Nazarov, L. I. Borodkin, and Maria A. Karpenko
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regional history ,economic history ,05 social sciences ,Investment (macroeconomics) ,Annual growth % ,Agricultural economics ,0506 political science ,transportation history ,history of financial markets ,Agrarian society ,Economics as a science ,urban history ,0502 economics and business ,Value (economics) ,050602 political science & public administration ,Economics ,050207 economics ,HB71-74 ,General Economics, Econometrics and Finance - Abstract
This paper shows that railroad building in Russia, as in Europe and the US in the nineteenth century, improved the value of land, a classic benefit of transportation investment in largely agrarian countries. From a database constructed for this paper, we use cross-sectional data for the fifty European Russian regions to show the association of the length of the railroad (measured in 1894), land prices (measured in 1900) and annual growth of land prices (in rubles) for 1885–1910.
- Published
- 2021
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95. Variation in urine osmolality throughout pregnancy: a longitudinal, randomized-control trial among women with overweight and obesity
- Author
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Alysha Kelyman, Danielle Symons Downs, Emily E. Hohman, Celine Latona, Katherine M McNitt, Abigail M. Pauley, Alison D. Gernand, Krista S. Leonard, Jennifer S. Savage, Jason John, Asher Y. Rosinger, and Hilary J. Bethancourt
- Subjects
medicine.medical_specialty ,Birth weight ,Medicine (miscellaneous) ,Overweight ,Article ,law.invention ,Randomized controlled trial ,Pregnancy ,law ,medicine ,Humans ,Obesity ,Retrospective Studies ,Nutrition and Dietetics ,business.industry ,Obstetrics ,Osmolar Concentration ,Gestational age ,medicine.disease ,Gestational Weight Gain ,Pregnancy Complications ,Urine osmolality ,Gestation ,Female ,medicine.symptom ,business ,Weight gain - Abstract
PURPOSE: Water needs increase during pregnancy, and proper hydration is critical for maternal and fetal health. This study characterized weekly hydration status changes throughout pregnancy and examined change in response to a randomized, behavioral intervention. An exploratory analysis tested how underhydration during pregnancy was associated with birth outcomes. METHODS: The Healthy Mom Zone Study is a longitudinal, randomized-control trial intervention aiming to regulate gestational weight gain (GWG) in pregnant women with overweight/obesity (n=27). Fourteen women received standard of care; 13 women additionally received weekly guidance on nutrition, physical activity, water intake, and health-promoting behaviors. Hydration status was measured weekly via overnight urine osmolality (Uosm) from ~8–36 weeks gestation; underhydration was dichotomized (Uosm≥500 mOsm/kg). Gestational age- and sex-standardized birth weight and length z scores and percentiles were calculated. We used mixed-effect and linear regression models to test covariate-adjusted relationships. RESULTS: No differences existed in Uosm or other characteristics between control and intervention women at baseline. Significant interactions (p=0.01) between intervention and week of pregnancy on Uosm indicated intervention women maintained lower Uosm, whereas control women had a significant quadratic (inverse-U) relationship and greater Uosm in the second and early third trimesters. Results were consistent across robustness and sensitivity checks. Exploratory analyses suggest underhydration was associated with birth weight, but not length, in opposite ways in the second vs. third trimester. CONCLUSION: A multi-component behavioral intervention helped women with overweight/obesity maintain better hydration throughout pregnancy. Future studies should confirm birth outcome results as they have important implications for early life nutrition. Trial Registration ClinicalTrials.gov Identifier: NCT03945266; registered May 10, 2019 retrospectively
- Published
- 2021
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96. Improving the Timing of Laboratory Studies in Hospitalized Children: A Quality Improvement Study
- Author
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Michael S. Leonard, Julie Albright Gottfried, Justin Lynn, Jan Schriefer, Nathaniel D. Bayer, Maha Kaissi, and Suzanne N. Ramazani
- Subjects
medicine.medical_specialty ,Quality management ,Psychological intervention ,Run chart ,Pediatrics ,Post-intervention ,03 medical and health sciences ,0302 clinical medicine ,030225 pediatrics ,Health care ,Humans ,Medicine ,030212 general & internal medicine ,Child ,business.industry ,Medical record ,Outcome measures ,General Medicine ,Hospitals, Pediatric ,Quality Improvement ,Checklist ,Caregivers ,Pediatrics, Perinatology and Child Health ,Emergency medicine ,Laboratories ,business ,Child, Hospitalized - Abstract
OBJECTIVES For hospitalized children and their families, laboratory study collection at night and in the early morning interrupts sleep and increases the stress of a hospitalization. To change this practice, our quality improvement (QI) study developed a rounding checklist aimed at increasing the percentage of routine laboratory studies ordered for and collected after 7 am. METHODS Our QI study was conducted on the pediatric hospital medicine service at a single-site urban children’s hospital over 28 months. Medical records from 420 randomly selected pediatric inpatients were abstracted, and 5 plan-do-study-act cycles were implemented during the intervention. Outcome measures included the percentage of routine laboratory studies ordered for and collected after 7 am. The process measure was use of the rounding checklist. Run charts were used for analysis. RESULTS The percentage of laboratory studies ordered for after 7 am increased from a baseline median of 25.8% to a postintervention median of 75.0%, exceeding our goal of 50% and revealing special cause variation. In addition, the percentage of laboratory studies collected after 7 am increased from a baseline median of 37.1% to 76.4% post intervention, with special cause variation observed. CONCLUSIONS By implementing a rounding checklist, our QI study successfully increased the percentage of laboratory studies ordered for and collected after 7 am and could serve as a model for other health care systems to impact provider ordering practices and behavior. In future initiatives, investigators should evaluate the effects of similar interventions on caregiver and provider perceptions of patient- and family-centeredness, satisfaction, and the quality of patient care.
- Published
- 2021
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97. Adaptive, behavioral intervention impact on weight gain, physical activity, energy intake, and motivational determinants: results of a feasibility trial in pregnant women with overweight/obesity
- Author
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Krista S. Leonard, Daniel E. Rivera, Penghong Guo, Katherine M McNitt, Jennifer S. Savage, Abigail M. Pauley, Allen R. Kunselman, Emily E. Hohman, Danielle Symons Downs, and Christy Stetter
- Subjects
medicine.medical_specialty ,Psychological intervention ,Overweight ,Weight Gain ,Article ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,Pregnancy ,law ,Intervention (counseling) ,medicine ,Humans ,Obesity ,030212 general & internal medicine ,Exercise ,mHealth ,General Psychology ,030505 public health ,business.industry ,medicine.disease ,Pregnancy Complications ,Psychiatry and Mental health ,Physical therapy ,Feasibility Studies ,Gestation ,Female ,Pregnant Women ,medicine.symptom ,Energy Intake ,0305 other medical science ,business ,Weight gain - Abstract
Interventions have modest impact on reducing excessive gestational weight gain (GWG) in pregnant women with overweight/obesity. This two-arm feasibility randomized control trial tested delivery of and compliance with an intervention using adapted dosages to regulate GWG, and examined pre-post change in GWG and secondary outcomes (physical activity: PA, energy intake: EI, theories of planned behavior/self-regulation constructs) compared to a usual care group. Pregnant women with overweight/obesity (N = 31) were randomized to a usual care control group or usual care + intervention group from 8 to 2 weeks gestation and completed the intervention through 36 weeks gestation. Intervention women received weekly evidence-based education/counseling (e.g., GWG, PA, EI) delivered by a registered dietitian in a 60-min face-to-face session. GWG was monitored weekly; women within weight goals continued with education while women exceeding goals received more intensive dosages (e.g., additional hands-on EI/PA sessions). All participants used mHealth tools to complete daily measures of weight (Wi-Fi scale) and PA (activity monitor), weekly evaluation of diet quality (MyFitnessPal app), and weekly/monthly online surveys of motivational determinants/self-regulation. Daily EI was estimated with a validated back-calculation method as a function of maternal weight, PA, and resting metabolic rate. Sixty-five percent of eligible women were randomized; study completion was 87%; 10% partially completed the study and drop-out was 3%. Compliance with using the mHealth tools for intensive data collection ranged from 77 to 97%; intervention women attended > 90% education/counseling sessions, and 68–93% dosage step-up sessions. The intervention group (6.9 kg) had 21% lower GWG than controls (8.8 kg) although this difference was not significant. Exploratory analyses also showed the intervention group had significantly lower EI kcals at post-intervention than controls. A theoretical, adaptive intervention with varied dosages to regulate GWG is feasible to deliver to pregnant women with overweight/obesity.
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- 2021
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98. No sex differences in learning in wild bumblebees
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Anne S. Leonard, Felicity Muth, Amber D. Tripodi, James P. Strange, and Rene F. Bonilla
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0106 biological sciences ,0303 health sciences ,03 medical and health sciences ,Zoology ,Animal Science and Zoology ,Biology ,010603 evolutionary biology ,01 natural sciences ,Ecology, Evolution, Behavior and Systematics ,030304 developmental biology - Abstract
Females and males often face different sources of selection, resulting in dimorphism in morphological, physiological, and even cognitive traits. Sex differences are often studied in respect to spatial cognition, yet the different ecological roles of males and females might shape cognition in multiple ways. For example, in dietary generalist bumblebees (Bombus), the ability to learn associations is critical to female workers, who face informationally rich foraging scenarios as they collect nectar and pollen from thousands of flowers over a period of weeks to months to feed the colony. While male bumblebees likely need to learn associations as well, they only forage for themselves while searching for potential mates. It is thus less clear whether foraging males would benefit from the same associative learning performance as foraging females. In this system, as in others, cognitive performance is typically studied in lab-reared animals under captive conditions, which may not be representative of patterns in the wild. In the first test of sex and species differences in cognition using wild bumblebees, we compared the performance of Bombus vancouverensis nearcticus (formerly bifarius) and Bombus vosnesenskii of both sexes on an associative learning task at Sierra Nevada (CA) field sites. Across both species, we found that males and females did not differ in their ability to learn, although males were slower to respond to the sucrose reward. These results offer the first evidence from natural populations that male bumblebees may be equally as able to learn associations as females, supporting findings from captive colonies of commercial bees. The observed interspecific variation in learning ability opens the door to using the Bombus system to test hypotheses about comparative cognition.
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- 2021
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99. Climate extreme variables generated using monthly time‐series data improve predicted distributions of plant species
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Melissa Fedrigo, Thomas A. Fairman, Michele Kohout, S. Leonard, Stephen B. Stewart, Jemma K. Cripps, Jane Elith, Matthew P. Chick, Craig R. Nitschke, Lauren T. Bennett, Stephen H. Roxburgh, Louise Durkin, and Sabine Kasel
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0106 biological sciences ,Humid continental climate ,Ecology ,Range (biology) ,010604 marine biology & hydrobiology ,010603 evolutionary biology ,01 natural sciences ,Environmental niche modelling ,Extreme weather ,Climatology ,Spatial ecology ,Environmental science ,Precipitation ,Time series ,Ecology, Evolution, Behavior and Systematics ,Orographic lift - Abstract
Extreme weather can have significant impacts on plant species demography; however, most studies have focused on responses to a single or small number of extreme events. Long-term patterns in climate extremes, and how they have shaped contemporary distributions, have rarely been considered or tested. BIOCLIM variables that are commonly used in correlative species distribution modelling studies cannot be used to quantify climate extremes, as they are generated using long-term averages and therefore do not describe year-to-year, temporal variability. We evaluated the response of 37 plant species to base climate (long-term means, equivalent to BIOCLIM variables), variability (standard deviations) and extremes of varying return intervals (defined using quantiles) based on historical observations. These variables were generated using fine-grain (approx. 250 m), time-series temperature and precipitation data for the hottest, coldest and driest months over 39 years. Extremes provided significant additive improvements in model performance compared to base climate alone and were more consistent than variability across all species. Models that included extremes frequently showed notably different mapped predictions relative to those using base climate alone, despite often small differences in statistical performance as measured as a summary across sites. These differences in spatial patterns were most pronounced at the predicted range margins, and reflect the influence of coastal proximity, continentality, topography and orographic barriers on climate extremes. Species occupying hotter and drier locations that are exposed to severe maximum temperature extremes were associated with better predictive performance when modelled using extremes. Understanding how plant species have historically responded to climate extremes may provide valuable insights into our understanding of contemporary distributions and help to make more accurate predictions under a changing climate.
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- 2021
- Full Text
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100. Vacation, Collective Restoration, and Mental Health in a Population
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Hartig, Terry, Catalano, Ralph, Ong, Michael, and Syme, S. Leonard
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- 2013
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