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9. Investigating the distribution and source(s) of lunar volatiles

Author

Mortimer, James

Subjects
523.3
Abstract

Following the renewed interest in the volatile inventory of the Moon witnessed in the last decade, from both sample studies and data from orbital missions, it is timely to reassess the distribution and likely source(s) of light element volatiles (C, N, He, Ne, and Ar) in a diverse suite of lunar mare basalts and soils, providing new insights about volatiles indigenous to the lunar interior, volatiles produced in situ at the lunar surface, and volatiles delivered to and implanted into the lunar surface. Simultaneous static-mode mass spectrometric measurements of these key volatiles, extracted from the same aliquot of sample by high-resolution stepped combustion, enable a more detailed identification of the different volatile components present by comparing their varying release patterns across a range of temperature steps. Taken in context with other studies of different volatile elements, this new data contributes towards a greater understanding of the Earth-Moon system, with additional implications for future in situ resource utilisation at the lunar surface. With an average δ15N value of +0.93 ± 9.39 ‰, the indigenous N component measured in mare basalts is most compatible with a CO carbonaceous chondrite source for nitrogen in the lunar interior, although some caveats exist. Variations in abundance and isotopic composition of indigenous nitrogen imply a heterogeneous lunar mantle. Assuming up to ~50 % loss of solar wind 36Ar from lunar soils, nitrogen trapped in soils can be reconciled with up to 87 % being contributed from a non-solar source with an isotopic composition of between +87 ‰ and +160 ‰. Noble gases in soils are dominated by solar wind components, with only minor amounts of cosmogenic neon being released at the highest temperature steps. In mare basalts, noble gases are a mixture of trapped, radiogenic, and cosmogenic components (from which cosmogenic production rates can be calculated) and exposure ages for previously undated samples suggested.

Published
2016
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10. ACC/AHA/SCAI/AMA-Convened PCPI/NCQA 2013 performance measures for adults undergoing percutaneous coronary intervention: a report of the American College of Cardiology/American Heart Association Task Force on Performance Measures, the Society for Cardiovascular Angiography and Interventions, the American Medical Association-Convened Physician Consortium for Performance Improvement, and the National Committee for Quality Assurance.

Author

Nallamothu, Brahmajee K, Tommaso, Carl L, Anderson, H Vernon, Anderson, Jeffrey L, Cleveland, Joseph C, Dudley, R Adams, Duffy, Peter Louis, Faxon, David P, Gurm, Hitinder S, Hamilton, Lawrence A, Jensen, Neil C, Josephson, Richard A, Malenka, David J, Maniu, Calin V, McCabe, Kevin W, Mortimer, James D, Patel, Manesh R, Persell, Stephen D, Rumsfeld, John S, Shunk, Kendrick A, Smith, Sidney C, Stanko, Stephen J, and Watts, Brook

Subjects
Humans, Coronary Angiography, Cardiology, Clinical Competence, Adult, American Heart Association, Societies, Medical, American Medical Association, Advisory Committees, Quality Assurance, Health Care, United States, Research Report, Percutaneous Coronary Intervention, ACC/AHA/SCAI/AMA-PCPI/NCQA Performance Measures, ambulatory-level quality, health policy and outcome research, hospital quality, percutaneous coronary intervention, quality indicators, Cardiorespiratory Medicine and Haematology, Public Health and Health Services, Cardiovascular System & Hematology
Published
2014

12. Children of Persons With Alzheimer Disease

Author

Jarvik, Lissy, LaRue, Asenath, Blacker, Deborah, Gatz, Margaret, Kawas, Claudia, McArdle, John J, Morris, John C, Mortimer, James A, Ringman, John M, Ercoli, Linda, Freimer, Nelson, Gokhman, Izabella, Manly, Jennifer J, Plassman, Brenda L, Rasgon, Natalie, Roberts, Jeffrey Scott, Sunderland, Trey, Swan, Gary E, Wolf, Phillip A, and Zonderman, Alan B

Subjects
Alzheimer's Disease, Acquired Cognitive Impairment, Prevention, Dementia, Brain Disorders, Neurosciences, Neurodegenerative, Aging, Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD), Clinical Research, Neurological, Adult, Alzheimer Disease, Biomarkers, Child, Genetic Predisposition to Disease, Humans, Pedigree, Risk Factors, Alzheimer disease offspring, risk factors, Clinical Sciences, Cognitive Sciences, Geriatrics
Abstract

Children of persons with Alzheimer disease (AD), as a group, face an increased risk of developing AD. Many of them, throughout their adult lives, seek input on how to reduce their chances of one day suffering their parent's fate. We examine the state of knowledge with respect to risk and protective factors for AD and recommend a research agenda with special emphasis on AD offspring.

Published
2008

20. Diet

Author

Borenstein, Amy R., primary and Mortimer, James A., additional

Published
2016
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38. Preface

Author

Borenstein, Amy R., primary and Mortimer, James A., additional

Published
2016
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42. The Role of Mastery and Social Resources in the Associations between Disability and Depression in Later Life.

Author

Jang, Yuri, Haley, William E., Small, Brent J., and Mortimer, James A.

Abstract

Assesses the impacts of mastery and social resources on depression and, in particular, whether they modify the link between disability and depression. Results reveal that a higher level of mastery and greater satisfaction with support had significant direct effects on depression and also buffered the adverse impact of disability on depression. (Contains 51 references and 2 tables.) (GCP)

Published
2002

49. The association between social resources and cognitive change in older adults: evidence from the Charlotte County healthy aging study

Author

Hughes, Tiffany F., Andel, Ross, Small, Brent J., Borenstein, Amy R., and Mortimer, James A.

Subjects
Aged -- Psychological aspects, Aged -- Social aspects, Cognition in old age -- Social aspects, Health, Psychology and mental health, Seniors
Abstract

We examined associations between multiple aspects of social resources and 5-year change in performance on different domains of cognitive function. Results indicated that lower satisfaction with support was associated with decline in episodic memory performance over 5 years. We also found significant interactions between age and social networks of family and friends and satisfaction with support for the separate cognitive domains. The results suggest that social resources may be differentially important for cognitive change but that different cognitive domains respond in a similar pattern to social resources. Key Words: Cognition--Social support.

Published
2008

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