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Aged Rats: Sex Differences And Responses To Chronic Stress, Rachel E. Bowman, Neil J. Maclusky, Samantha Diaz-Weinstein, Mark C. Zrull, Victoria N. Luine

Psychology Faculty Publications

Cognitive, as well as physiological, sex differences exist in young adult rats under both basal conditions and following chronic stress; however, few studies have examined whether sex differences remain in aged subjects and whether responses to stress are altered. We compared aged male and female Fischer 344 rats (21.5 months at testing) without stress and when given 21 days of restraint for 6 h/day on locomotion, anxiety-related behaviors, object recognition (non-spatial memory), object placement (spatial memory), body weight and serum steroid hormone levels. Control (unstressed) females had lower levels of estradiol and testosterone and higher corticosterone than males, and stress …

Ethyleneproduction As An Indicator Of Stress Conditions In Hydroponically-Grown Strawberries, Justin D. Hogan, Elizabeth E. Murray, Marcia Harrison-Pitaniello Phd

Biological Sciences Faculty Research

As a soilless system, hydroponics eliminates competing weeds and soil-born pests while conserving water and providing conditions that can be quickly altered to suit specific crops. However, stress-induced physiological conditions may arise within the system from factors such as mechanical injury, pests, or inconsistent nutrient flow rates that result in some plants receiving too much or too little water. Most abiotic stress conditions result in increased production of the plant hormone ethylene. High levels of ethylene inhibit growth, cause premature ripening, and induce the onset of senescence, potentially reducing the productivity of hydroponically-grown crops. In this study, we demonstrate that …

Hope As A Source Of Resilience In Later Adulthood, Anthony D. Ong, Lisa Edwards, C. S. Bergeman

College of Education Faculty Research and Publications

This research provided a preliminary investigation of how variations in trait and state hope are associated with positive adaptation to stress in later adulthood. Trait hope and neuroticism were measured by questionnaires and state hope, stress, and negative emotions were assessed daily for 45 days. Results from multilevel random coefficient modeling analyses suggested that daily hope provides protective benefits by keeping negative emotions low, while also contributing to adaptive recovery from stress. The dynamic linkages between daily hope, stress, and emotion were further moderated by individual differences in trait hope. Compared with those low in trait hope, high-hope individuals showed …

Taking Care Of Your Nutritional And Physical Needs, Joan Hegerfeld

SDSU Extension Extra Archives

When asked what they value most, many people will say their health. However, when faced with a stressful situation that will not go away, the same people forget all about their health and start worrying. Farm and ranch families struggle with extreme stress from uncontrollable forces such as weather, low market prices, or farm machinery breaking down. For many farmers, ranchers, and farm workers, decision making and adjusting to the extraordinary stress consumes their whole thinking, their whole days, their sleepless nights. Their livelihood is dependent upon forces over which they have no control. Eating right and getting adequate amounts …

Soft-Started Induction Motor Modeling And Heating Issues For Different Starting Profiles Using A Flux Linkage Abc Frame Of Reference, M. G. Solveson, Behrooz Mirafzal, Nabeel Demerdash

Electrical and Computer Engineering Faculty Research and Publications

In order to mitigate the adverse effects of starting torque transients and high inrush currents in induction motors, a popular method is to use electronically controlled soft-starting voltages utilizing series-connected silicon-controlled rectifiers (SCRs). Investigation of semioptimum soft-starting voltage profiles was implemented using a flux linkage ABC frame of reference model of a soft-started three-phase induction motor. A state-space model of the soft-starter thyristor switching sequence for the motor and load was developed and implemented in a time-domain simulation to examine winding heating and shaft stress issues for different starting profiles. Simulation results of line starts and soft starts were compared …

Technology As A Cultural Force: For Alena And Griffin, Albert Borgmann

Philosophy Faculty Publications

To various degrees, the citizens of the advanced industrial countries are suffering from a crisis that is as profound as it is vague and therefore hard to deal with. The problem is particularly acute in the United States, however, and in what follows, some of the illustrations pertain particularly to that country, the one I live in and know best. In any case, though vagueness obscures the crisis, there have to be symptoms of some sort; otherwise we would not feel troubled. What are the signs of trouble in the culture of technology and democracy? First there are economic problems …

Lung Circulation Modeling: Status And Prospect, Anne V. Clough, Said H. Audi, Robert C. Molthen, Gary S. Krenz

Biomedical Engineering Faculty Research and Publications

Mathematical modeling has been used to interpret anatomical and physiological data obtained from metabolic and hemodynamic studies aimed at investigating structure-function relationships in the vasculature of the lung, and how these relationships are affected by lung injury and disease. The indicator dilution method was used to study the activity of redox processes within the lung. A steady-state model of the data was constructed and used to show that pulmonary endothelial cells may play an important role in reducing redox active compounds and that those reduction rates can be altered with oxidative stress induced by exposure to high oxygen environments. In …

Ethics And Welfare: Pain Perception In Fish, L. U. Sneddon

Aquaculture Collection

Fish welfare is currently a controversial subject with many scientific studies now demonstrating the possibility for fish to experience negative events such as pain, fear and stress. This has important implications in the treatment of fish during commercial and experimental procedures in terms of ethics and welfare. In this review, the evidence for pain perception in fish is considered and the repercussions for the use of fish as a research model as well as in aquaculture and largescale fisheries. These issues are discussed briefly from a welfare and ethical perspective.

Organizational Stress In Social Care, Brian Mccarthy

Other resources

The aim of this research project was to develop a model of understanding, coping with and preventing work-related stress in social care organizations. The research was framed conceptually in a model of organizational stress developed and adapted from Beehr’s (1998) integrative model of organizational stress. The first two stages of the research project explored by interview and survey staff and management perceptions of stress in their organizations. It was found that both acute and chronic stressors occurred and were seen to have increased; organizational stressors were also likely to be more persistent and chronic when they occurred. Interviewees were
concerned …

Detection Of Moisture Stress In Eucalyptus Camaldulensis Using Leaf-Level Spectral Reflectance: Implications For Remote Sensing, Laurie A. Chisholm

Faculty of Science - Papers (Archive)

Foliage moisture stress may be detectable by remote sensing using high resolution spectral data, but meaningful diagnosis requires that plant water status be assessed on the ground under controlled conditions. Design parameters of an experimental plantation of E. camaldulensis (River red gum), were used to examine tree-level responses to moisture stress, as measured by xylem water potential, and relationships to physiological parameters including spectral reflectance, chlorophyll flurescence, and cholorphyll across a range of stress categories.

The Effects Of Training In Behaviour Modification Strategies On Stress, Burnout, And Therapeutic Attitudes In Frontline Inpatient Mental Health Nurses, Hamish J. Mcleod, Lisa Densley, Kate Chapman

Faculty of Social Sciences - Papers (Archive)

Psychiatric nursing is a stressful profession associated with high levels of burnout. Previous research has demonstrated that burnout in psychiatric nurses can be reduced via training that improves behaviour modification skills. However, the minimum amount of training required to demonstrate a beneficial effect is unclear. We evaluated the impact of a 4-day behaviour modification training program on stress, burnout, and therapeutic attitudes in nurses who were in frequent daily inpatient contact with patients with severe mental illnesses. Nurses working in the same wards served as a control group. Training improved therapeutic attitudes but did not alter self ratings of job-stress …

Effects On The Function Of Three Trophic Levels In Marine Plankton Communities Under Stress From The Antifouling Compound Zinc Pyrithione, M. Hjorth, I. Dahllöf, Valery E. Forbes

Valery Forbes Publications

This study aimed to investigate functional responses of natural marine planktonic communities to stress from the antifouling compound zinc pyrithione (ZPT). Isotope labelling techniques (¹⁴C) were applied to study bacterial incorporation of leucine, photosynthetic activity of phytoplankton and grazing of labelled prey by zooplankton communities for 6 days after exposures to nominal concentrations of 0, 5, 25, 50 nM ZPT in a mesocosm experiment in Isefjord, Denmark.

Significant direct effects were visible on chlorophyll α concentrations, which decreased in all exposed communities, to between 48 and 36% of control concentrations on Day 3, 1 day after the last …

Psychological Stress Among Family Practice Patients Visiting A Teaching Hospital In Karachi, Waris Qidwai, Malika Kassamali

Department of Family Medicine

Objective: To study psychological stress among family practice patients to highlight its importance.
Design: A cross sectional study. Setting: Family Practice Center of Aga Khan University Hospital, Karachi - Pakistan, in July 2003. Patients and Methods: Family practice patients were interviewed without using any systematic randomization. A questionnaire was developed that included data on demographic profile of the patient and questions on patient perceptions whether they were in stress or not, the degree of stress if perceived to be present and its causes including need to seek medical help. They were simultaneously administered a stress screening questionnaire that …