1,682 research outputs found

    How to Raise the Chicks

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    A Follow-Up Study Investigating the Relationships Between Holland\u27s Personality Types and Selected Career Choice Variables

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    This follow-up study utilized John L. Holland\u27s theory of vocational personalities and work environments to examine the relationship between students personality types and their career choices. The study sought to determine whether data collected using Holland\u27s Self-Directed Search (SDS) was a valid predictor of (1) career goal, (2) eventual choice of college major, (3) persistence to graduation, (4) occupation (type of job held at the time the data was collected), and (5) level of satisfaction with occupation (job) at the time data was gathered. The stratified random sample for the study was composed of 180 subjects drawn from a population of entering freshmen at a middle-sized, southern, urban university in 1979. The initial set of data gathered by the SDS from these subjects was compared with data collected from the same individuals ten years later (1989-90). Global job satisfaction was also measured in 1989-90 by administering the Job-in-General scale of the Job Descriptive Index. Congruence (the level of agreement) between subjects\u27 personality type (as determined by the SDS) and the choices they made with regard to the five areas listed in the first paragraph was measured by the Iachan Index. Statistical significance for the congruence results was set at.05. For the total sample, the results of the Chi-square distribution showed no significant difference between subjects with high-moderate congruence between Personality Type (Summary) code and Occupational Aspiration (Daydream) code and those with weak poor congruence for persistence to college graduation. However, results from Fisher\u27s Exact Probability test showed that subjects with high-moderate congruence in sub-groups R, I, and S were more likely to persist to graduation than those with weak-poor congruence. For the total sample and the majority subjects in sub-groups R, I, and S, the results of Cohen\u27s Weighted Kappa test showed that Personality Type (Summary code) was a moderately efficient predictor of College Major. For the total sample, the results of the Chi-square distribution showed that subjects with high-moderate congruence between Summary code and College Major code were more likely to be satisfied with their college major than those who had weak-poor congruence between the two codes. Results from Fisher\u27s Exact Probability test showed that subjects with high-moderate congruence in sub-groups R, I, A and S were more likely to be satisfied with their college major than those with weak-poor congruence

    Carnation crop control

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    Qualitative Phytochemical Analysis and Microbial Inhibitory Activities of Pacific Rain Tree (Samanea saman (Jacq.) Merr.) Pods

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    Background: Crop diseases and human health are always at stake and the emerging problem on the use of synthetic anti-pathogens and medicine is one of the most difficult to combat. The first step towards determining such capabilities among plants is to determine their phytochemicals.Methods: Eight preliminary phytochemical tests was done on Samanea saman which includes, test for alkaloids saponins, flavonoids, tannins, glycosides, steroids, terpenoids and resins. Powdered pods were subjected to ethanol and aqueous extraction. Extracts were also tested for its antifungal and anti-microbial properties against Fusarium oxysporum, E. coli and S. aureus,respectively.Results: Out of the eight phytochemical tests done, seven (7) were found to be present both on the ethanol and aqueous extracts namely, alkaloids, saponins, tannins, glycosides, steroids, terpenoids and resins. However, flavonoids is absent. The statistical results exhibited that there is a significant difference on the inhibitory effects against in-vitro bioassay of Fusarium oxysporumwhich is known to cause crop wilts and the two bacterial pathogens E. coli and S. aureus.Conclusions: The presence of such phytochemicals in Samanea saman pods revealed that it can be a basis of new, natural and non-synthetic treatments. This finding suggests that its pods can be used as antibacterial and antifungal source

    Age Sensitivity of Behavioral Tests and Brain Substrates of Normal Aging in Mice

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    Knowledge of age sensitivity, the capacity of a behavioral test to reliably detect age-related changes, has utility in the design of experiments to elucidate processes of normal aging. We review the application of these tests in studies of normal aging and compare and contrast the age sensitivity of the Barnes maze, eyeblink classical conditioning, fear conditioning, Morris water maze, and rotorod. These tests have all been implemented to assess normal age-related changes in learning and memory in rodents, which generalize in many cases to age-related changes in learning and memory in all mammals, including humans. Behavioral assessments are a valuable means to measure functional outcomes of neuroscientific studies of aging. Highlighted in this review are the attributes and limitations of these measures in mice in the context of age sensitivity and processes of brain aging. Attributes of these tests include reliability and validity as assessments of learning and memory, well-defined neural substrates, and sensitivity to neural and pharmacological manipulations and disruptions. These tests engage the hippocampus and/or the cerebellum, two structures centrally involved in learning and memory that undergo functional and anatomical changes in normal aging. A test that is less well represented in studies of normal aging, the context pre-exposure facilitation effect (CPFE) in fear conditioning, is described as a method to increase sensitivity of contextual fear conditioning to changes in the hippocampus. Recommendations for increasing the age sensitivity of all measures of normal aging in mice are included, as well as a discussion of the potential of the under-studied CPFE to advance understanding of subtle hippocampus-mediated phenomena

    The hard X-ray burst spectrometer event listing, 1980 - 1985

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    This event listing is a comprehensive reference for the hard X-ray bursts detected with the Hard X-Ray Burst Spectrometer on the Solar Maximum Mission from the time of launch on February 14, 1980 to September 1985. Over 8000 X-ray events were detected in the energy range from 30 to approx. 500 keV with the vast majority being solar flares. The listing includes the start time, peak time, duration and peak rate of each event

    Advances and Developments in the Use of Human Mesenchymal Stem Cells – A Few Considerations

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    One less visited area in musculoskeletal stem cell research is the effects of donor age on quality of stem cells. The prevalence of degenerative orthopaedic conditions is large, and the older population is likely to receive great benefit from stem cell therapies. There are many known growth factors involved in controlling and influencing stem cell growth which are also related to cell senescence. Of which, expressions are found to be altered in mesenchymal stem cells from older donors. Considerations must also be taken of these mechanisms which also have a role in cell cycle and tumour suppression

    Advances and Developments in the Use of Human Mesenchymal Stem Cells – A Few Considerations

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    One less visited area in musculoskeletal stem cell research is the effects of donor age on quality of stem cells. The prevalence of degenerative orthopaedic conditions is large, and the older population is likely to receive great benefit from stem cell therapies. There are many known growth factors involved in controlling and influencing stem cell growth which are also related to cell senescence. Of which, expressions are found to be altered in mesenchymal stem cells from older donors. Considerations must also be taken of these mechanisms which also have a role in cell cycle and tumour suppression

    The complete Hard X Ray Burst Spectrometer event list, 1980-1989

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    This event list is a comprehensive reference for all Hard X ray bursts detected with the Hard X Ray Burst Spectrometer on the Solar Maximum Mission from the time of launch on Feb. 14, 1980 to the end of the mission in Dec. 1989. Some 12,776 events were detected in the energy range 30 to 600 keV with the vast majority being solar flares. This list includes the start time, peak time, duration, and peak rate of each event
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