Digital Commons Network^™

Hormetic Modulation Of Aging And Longevity By Mild Heat Stress, Suresh I S Rattan

Dose-Response: An International Journal

Aging is characterized by a stochastic accumulation of molecular damage, progressive failure of maintenance and repair, and consequent onset of age-related diseases. Applying hormesis in aging research and therapy is based on the principle of stimulation of maintenance and repair pathways by repeated exposure to mild stress. In a series of experimental studies we have shown that repetitive mild heat stress has anti-aging hormetic effects on growth and various other cellular and biochemical characteristics of human skin fibroblasts undergoing aging in vitro. These effects include the maintenance of stress protein profiles, reduction in the accumulation of oxidatively and glycoxidatively damaged …

Blessings Of The Last Fish, Maureen Tolman Flannery

The Prairie Light Review

No abstract provided.

The Eastern Maine Transportation Collaborative’S (Emtc) Health Services Initiative Needs Assessment Research Final Report, University Of Maine Center On Aging

Maine Center on Aging Research and Evaluation

The University of Maine Center on Aging (CoA) in collaboration with members of the Eastern Maine Transportation Collaborative (EMTC) conducted a twelve month needs assessment focusing on the challenges and barriers that older adults face in accessing chronic care medical services such as diabetes care, cancer care, dialysis, cardiac rehabilitation, and physical therapy in Hancock, Washington, and Penobscot Counties. The assessment was conducted through phone interviews, surveys, and community case studies. Participants included older adult chronic care patients, escorts and family members accompanying patients to chronic care appointments, medical office schedulers, and transportation providers. The goals of the assessment were …

Variation In The Carotid Bifurcation Geometry Of Young Versus Older Adults: Implications For Geometric Risk Of Atherosclerosis, Jonathan B. Thomas, Luca Antiga, Susan L. Che, Jaques S. Milner, Dolores A.Hangan Steinman, J. David Spence, Brian K. Rutt, David A. Steinman

Department of Medicine Publications

Background and Purpose - Retrospective analysis of clinical data has demonstrated major variations in carotid bifurcation geometry, in support of the notion that an individual's vascular anatomy or local hemodynamics may influence the development of atherosclerosis. On the other hand, anecdotal evidence suggests that vessel geometry is more homogenous in youth, which would tend to undermine this geometric risk hypothesis. The purpose of our study was to test whether the latter is indeed the case. Methods - Cross-sectional images of the carotid bifurcations of 25 young adults (24±4 years) and a control group of 25 older subjects (63±10 years) were …

Silverwire, University Of Maine Center On Aging

Maine Center on Aging Education and Training

The Silverwire Newsletter is a publication that highlights the work of the UMaine Center on Aging. The topics covered in this edition of the Silverwire Newsletter include new funding opportunities, a VISTA profile, Maine’s older workers, governor’s service awards, recent publications, the Eastern Maine transportation needs assessment, and elder safety.

Estimated Age Effects In Baseball, Ray C. Fair

Cowles Foundation Discussion Papers

Age effects in baseball are estimated in this paper using a nonlinear fixed-effects regression. The sample consists of all players who have played 10 or more “full-time” ’ years in the major leagues between 1921 and 2004. Quadratic improvement is assumed up to a peak-performance age, which is estimated, and then quadratic decline after that, where the two quadratics need not be the same. Each player has his own constant term. The results show that aging effects are larger for pitchers than for batters and larger for baseball than for track and field, running, and swimming events and for chess. …

Variability Of Motor Unit Discharge And Force Fluctuations Across A Range Of Muscle Forces In Older Adults, Brian L. Tracy, Katrina S. Maluf, Jennifer L. Stephenson, Sandra K. Hunter

Exercise Science Faculty Research and Publications

Variability of motor unit discharge is a likely contributor to the greater force fluctuations observed in old adults at low muscle forces. We sought to determine whether the variability of motor unit discharge rate underlies the fluctuations in force during steady contractions across a range of forces in young (n = 11) and old (n = 14) adults. The coefficient of variation (CV) for discharge rate and force were measured during a force-matching task as the first dorsal interosseous muscle performed isometric contractions. The recruitment thresholds of the 78 motor units ranged from 0.04% to 34% of maximal …

Announcing Jchp's Center For Applied Research On Aging And Health, Laura N. Gitlin, James B. Erdmann

Population Health Matters (Formerly Health Policy Newsletter)

No abstract provided.

A Drosophila Deg/Enac Channel Subunit Is Required For Male Response To Female Pheromones, Heping Lin, Kevin J. Mann, Elena Starostina, Ronald D. Kinser, Claudio W. Pikielny

Dartmouth Scholarship

Odorants and pheromones as well as sweet- and bitter-tasting small molecules are perceived through activation of G protein-coupled chemosensory receptors. In contrast, gustatory detection of salty and sour tastes may involve direct gating of sodium channels of the DEG/ENaC family by sodium and hydrogen ions, respectively. We have found that ppk25, a Drosophila melanogaster gene encoding a DEG/ENaC channel subunit, is expressed at highest levels in the male appendages responsible for gustatory and olfactory detection of female pheromones: the legs, wings, and antennae. Mutations in the ppk25 gene reduce or even abolish male courtship response to females in the dark, …

Fractals Analysis Of Cardiac Arrhythmias, Mohammed Saeed

Department of Biological & Biomedical Sciences

Heart rhythms are generated by complex self-regulating systems governed by the laws of chaos. Consequently, heart rhythms have fractal organization, characterized by self-similar dynamics with long-range order operating over multiple time scales. This allows for the self-organization and adaptability of heart rhythms under stress. Breakdown of this fractal organization into excessive order or uncorrelated randomness leads to a less-adaptable system, characteristic of aging and disease. With the tools of nonlinear dynamics, this fractal breakdown can be quantified with potential applications to diagnostic and prognostic clinical assessment. In this paper, I review the methodologies for fractal analysis of cardiac rhythms and …

Surface And Sructure Investigations Of Membrane Electrode Assembly In Dmfc Lifetime Testing~*, Chengxuan Chengxuan, Cheng Peng, Meng-Di You, Jing Liu, Ying Zhang

Journal of Electrochemistry

The lifetime and performance of a direct methanol fuel cell (DMFC) were investigatedto understand the correlation between thestructure of catalysts /membrane and cell performanceversus time.The cell polarization and performance curves were obtained during the DMFC operation with the time.The catalysts and Nafion~ membrane of the membrane electrode assembly (MEA) from the lifetime test were comprehensively examined by XRD, HRTEM, FTIRand Raman spectroscope techniques.The results revealed that there was significant performance degradation during the first 200 hours operation; while the degradation was slowing down between 200 and 704hours operation.The degradation became worse after 1 002 h operation.The increases of the catalyst …

Stress And Cognitive Performance In Older Adults, Christopher B. Rosnick

USF Tampa Graduate Theses and Dissertations

The current dissertation sought to examine stress in three different, but overlapping, ways. The first study examined how self-reported negative life events, in the aggregate and individually, are associated with cognitive performance. The results suggested that there was no significant relationship between the aggregate measures of self-reported negative life events and cognitive performance. On the other hand, several individual negative life events were associated with cognitive functioning. The findings support previous research indicating that using estimates of individual stressors rather than aggregate measures of stressors increases the predictive validity of stress measurement.

The second study assessed the cross-sectional and longitudinal …

Senior Health Independence Promotion Program (Ship): A Collaboration Between The Philadelphia Senior Center And The Jefferson Health System, Christine Arenson

Population Health Matters (Formerly Health Policy Newsletter)

No abstract available.

Lankenau Medical Research Center, Vincent J. Cristofalo

Population Health Matters (Formerly Health Policy Newsletter)

No abstract available.

Triangulation Between Elderly Parents And Adult Children, Ryan J. Anderson

Theses and Dissertations

This study explored the extent of triangulation between elderly people and their adult children, and examines the relationship of triangulation with marital and individual outcomes such as problem solving, negative affective communication, time spent together, intimacy, depression, and marital satisfaction. Triangulation between adult children and elderly parents was found to be strongly related with negative outcomes for elderly parents in each of the dependent variables.

Time To Task Failure Differs With Load Type When Old Adults Perform A Submaximal Fatiguing Contraction, Sandra K. Hunter, Ludovic Rochette, Ashley Critchlow, Roger M. Enoka

Exercise Science Faculty Research and Publications

Young adults exhibit a longer time to task failure when performing a submaximal isometric contraction by pushing against a force transducer (force task) than when supporting an equivalent inertial load (position task). The purpose of this study was to compare the time to failure for old adults when they performed a force task and a position task with the elbow flexor muscles. Eighteen old adults (72 ± 4 years) performed the force and position tasks at 20% maximal voluntary contraction (MVC) force until task failure. The time to task failure was briefer for the position task (10.6 ± 6.1 min) …

Diabetes, Cognitive Decline, And Alzheimer's Disease: The Cache County Study On Memory, Health, And Aging, Gene Charoonruk

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studies have reported mixed results for people with or without diabetes with cognitive decline or Alzheimer's disease (AD). Cognitive decline and AD among people with diabetes will be the focus of much discussion since results have been controversial.

The study examined whether diabetes is associated with cognitive decline and whether it is an independent risk factor for the development of AD among elderly residents of Cache County, Utah.

Results revealed an association between diabetes and a lower average Modified Mini Mental State Examination (3MS) score of nearly a point lower at baseline. Results also showed an association between diabetes and …

Active Aging: Motives And Barriers, Francis G. Caro, Eilon Caspi, Jeffery Burr, Jan Mutchler

Gerontology Institute Publications

Both the successful aging and productive aging literatures attach great importance to activity. In the successful aging paradigm, activity contributes positively to both physical health and psychological well being. In the productive aging paradigm, older people make contributions to society through certain types of activities, notably gainful employment, community service volunteering, informal assistance usually within their families, and political participation.

Less attention has been given to the relationships among various forms of productive activity. Various forms of activity may be complementary or competitive. In other words, participation in one form of productive activity may open doors to other forms of …

Sexuality And The Aging Adult: The Attitude And Practice Of Physicians And Nurse Practitioners, Susan Runsvold

Master's Projects

Background: As the population ages, many quality of life issues will generate discussion. One such issue is sexuality of the aging adult. While there is substantial documentation related to the physiology and desires of the aging adult, little is known about medical practitioners' beliefs and practices regarding sexuality. Method: A 14 question survey with a comment section was developed and mailed to 269 physicians and nurse practitioners in Santa Clara County, California. The responses were evaluated using descriptive statistics. The comments received were grouped related to intent or topic. Results: There was no discernible difference between the beliefs and practices …

Motivation For Active Aging: Results Of A Pilot Study, Francis G. Caro, Laney Bruner-Canhoto, Jeffery Burr, Jan Mutchler

Gerontology Institute Publications

The current research explores the question whether activity on the part of older people can be explained, in part, by a general motivation to be active that cuts across various forms of activity. One premise is that motivation defined as “personal interest or desire” is one of a number of forces that contributes to participation in an activity. A further premise is that a distinction may be made between motivation that is specific to a particular activity and general motivation to be active. A general motive to be active may help to explain specific forms of activity. Further, a general …

Live Long - And Prosper?, Glenn Harlan Reynolds

Scholarly Works

No abstract provided.

Practicing The Order Of Widows: A New Call For An Old Vocation, M. Therese Lysaught

M. Therese Lysaught

This essay argues for a renewed institution of an ancient Christian practice, the Order of Widows. Drawing on the Roman Catholic tradition's recent writings on the elderly, particularly the 1998 document from the Pontifical Council for the Laity entitled “The Dignity of Older People and their Mission in the Church and in the World,” I argue that we find within the Roman Catholic tradition advocacy for a renewed understanding of the vocation of the elderly within the Church. Building on this, I then trace in the broadest of outlines some elements of what a renewal of the Order of Widows …

Shifting Identity: Process And Change In Identity Of Aging Mexican-American Males, Gary L. Villereal, Alonzo Cavazos

The Journal of Sociology & Social Welfare

This article addresses the shift in machismo identity that occurs in Mexican-American male identity and the developmental process and the change in one's role as an elderly Mexican-American man.

Socialization of male-ism in Mexican-American boys begins with the cultural expectation that a young boy is and will be a man. There are also explicit expectations that girls should be respected but that, in contrast to boys, girls should be submissive and obedient. This is the beginning of machismo and the separation of being a "man" versus being a "woman."

Aging results in a loss of machismo and this is evident …

The Peculiarities Of Men Aging: A Collection Of Anecdotes, Robert Blundo, Tamara Estes

The Journal of Sociology & Social Welfare

Men are reticent to share with others the slow realization that with age they begin to confront a world that they had not expected. They had not expected to grow old. Now that this is happening, men have few relationships that permit them to share their thoughts and moments of recognition. The anecdotes that men share are revealing in that they demonstrate basic human uncertainties about the later part of life's cycle.

Viagra: Medical Technology Constructing Aging Masculinity, Gregory Gross, Robert Blundo

The Journal of Sociology & Social Welfare

Medicalization and commodification of the body through technology in the form of Viagra and other erectile dysfunction drugs is reinforcing the cultural expectations that ageing men are required to age well to maintain youthful masculinity. Ageing well is explored as it relates the construction of masculinity, sexuality and ageing men's bodies.

Supercritical Carbon Dioxide Aided Preparation Of Nickel Oxide/Alumina Aerogel Catalyst, Haitao Li

USF Tampa Graduate Theses and Dissertations

The strength, thermal stability, pore structure and morphology are keys to success for wider deployment of aerogels. Furthermore, co or subsequent functionalization of the surfaces are equally, if not more important. This study addresses these issues through a new method. The path involves successful use of surfactant templating, supercritical extraction and drying, and supercritical fluid aided functionalization of the surface. Alumina support and alumina supported nickel catalyst particles are used to evaluate the approach. Initially thermally stable surfactant alumina was synthesized. The surfactant template was removed completely with the aid of a supercritical solvent mixture. Surfactant-templated alumina aerogel showed remarkable …

Fracture Toughness Of Human Femoral Neck Cortical Bone Is Reduced With Age And With Increased Osteon Eccentricity, Y. N. Yeni, Timothy L. Norman

Engineering and Computer Science Faculty Presentations

No abstract provided.

Older Workers: Untapped Assets For Creating Value, Knowledge@Smu

Knowledge@SMU

The days when an executive could look forward to a leisurely retirement out on the golf course are over, thanks to a possible looming job shortage, a graying population, low savings rates and an insecure Social Security system. The impact of these factors on both workers and companies was the subject of the Symposium on Older Workers, co-sponsored recently by the AARP Global Aging Program along with Wharton's Center for Human Resources and Boettner Center for Pensions and Retirement Research. Speakers included AARP CEO William D. Novelli, Olivia Mitchell, executive director of Wharton's Pension Research Council, and Thomas Dowd, a …

Silverwire, University Of Maine Center On Aging

Maine Center on Aging Education and Training

The Silverwire Newsletter is a publication that highlights the work of the UMaine Center on Aging. The topics covered in this edition of the Silverwire Newsletter include new projects on elder transportation and relatives parenting children exposed to HIV, prescription drug return, the MePEP Elder Abuse Lunch and Learn series, the Aging Policy Conference, religious attendance and subjective well-being, and RSVP volunteers for homeland security.

Aging And Safety: Tips And Resources, J. Crittenden, L. Ruffin, Maine Partners For Elder Protection

Maine Center on Aging Service and Consultation

The Maine Partners for Elder Protection Project provides support to older individuals in order to feel safe and independent in their lives. It provides an Elder Care Specialist to listen to concerns, provide information, and make suggestions and plans. It includes tips to be safe when shopping online, how to avoid telephone scams, how to avoid identity theft, and how to be safe at night and at home. Coming up with a safety plan is crucial, and can be accomplished through these tips and having phone numbers on hand to call in case one needs help.