52 research outputs found
Seedbanking Potential of Kentucky Bluegrass and Perennial Ryegrass
The ability of the cool season turfgrasses, Kentucky bluegrass (Poa pratensis L.) and perennial ryegrass (Lolium perenne L.) to form a seedbank under intense traffic scenarios is not well understood. The practice of establishing a seedbank on athletic fields has been often recommended in popular venues, but has received little attention in academic research. Likewise, anecdotal reporting of seed unexpectedly germinating long after planting are common but have not been scientifically tested
Barenbrug Seeding Trial
Various proprietary seeding mixtures from Barenbrug, USA were examined to determine their effectiveness during both a spring and autumn establishment period under various levels of traffic. RPR perennial ryegrass (Lolium perenne L.), SOS annual ryegrass (Lolium multiflorum Lam.), and TurfBlue Kentucky bluegrass (Poa pratensis L.) were mixed at various ratios to examine how they performed under traffic stress. Also of interest was to determine if annual ryegrass and Kentucky bluegrass could be used as an alternating dominant species
Imprelis 2SL Crabgrass and Broadleaf Weed Efficacy and Seedling Tolerance
Previous studies have shown that Imprelis (aminocyclopyrachlor) 2SL has been successfully used in controlling broadleaf weeds in existing stands of turf. The objectives of this study were to evaluate various application rates and application sequences of Imprelis 2SL for control of crabgrass and broadleaf weeds, as well as seedling tolerance, in spring seedings
Psychological and physical correlates of musculoskeletal symptoms in male professional divers and offshore workers
Background: Underwater divers are more likely to complain of musculoskeletal symptoms than a control population. Accordingly, we conducted a study to determine whether musculoskeletal symptoms reflected observable physical disorder, to ascertain the relationship between symptoms and measures of mood, memory and executive function and to assess any need for future screening.
Methods: A 10% random sample of responders to a prior postal health questionnaire was examined (151 divers, 120 non-diving offshore workers). Participants underwent physical examination and a neuropsychological test battery for memory and executive function. Participants also completed the Hospital Anxiety and Depression Scale for anxiety (HADSa) and depression (HADSd), and questionnaires for physical health-related quality of life (SF36 PCS), mental health-related quality of life (SF36 MCS), memory (Cognitive Failures Questionnaire (CFQ), Prospective and Retrospective Memory Questionnaire (PRMQ)), executive function (dysexecutive syndrome questionnaire (DEX)), musculoskeletal symptoms (MSS) and general unrelated symptom reporting.
Results: Of participants with moderate/severe musculoskeletal symptoms, 52% had physical signs, and of participants with no symptoms, 73% had no physical signs. There was no difference in the prevalence of signs or symptoms between groups. Musculoskeletal symptoms were associated with lower SF36 PCS for both groups. In divers, musculoskeletal symptoms were associated with higher general unrelated symptom reporting and poorer scoring for HADSa, PRMQ, CFQ and DEX with scores remaining within the normative range. A positive physical examination was associated with general unrelated symptom reporting in divers. There were no differences in neuropsychological test scores attributable to either group or musculoskeletal symptoms.
Conclusions: Musculoskeletal symptoms were associated with physical signs, but this was not a strong effect. Reporting of musculoskeletal symptoms by the divers studied was also associated with a tendency to report symptoms generally or somatisation, and caution should be exercised regarding their interpretation as an indication of physical disease or their use for health screening
Reference Ranges for Bone Mineral Density and Prevalence of Osteoporosis in Vietnamese Men and Women
<p>Abstract</p> <p>Background</p> <p>The aim of this study was to examine the effect of different reference ranges in bone mineral density on the diagnosis of osteoporosis.</p> <p>Methods</p> <p>This cross-sectional study involved 357 men and 870 women aged between 18 and 89 years, who were randomly sampled from various districts within Ho Chi Minh City, Vietnam. BMD at the femoral neck, lumbar spine and whole body was measured by DXA (Hologic QDR4500). Polynomial regression models and bootstraps method were used to determine peak BMD and standard deviation (<it>SD</it>). Based on the two parameters, we computed T-scores (denoted by <it>T</it><sub>VN</sub>) for each individual in the study. A similar diagnosis was also done based on T-scores provided by the densitometer (<it>T</it><sub>DXA</sub>), which is based on the US White population (NHANES III). We then compared the concordance between <it>T</it><sub>VN </sub>and <it>T</it><sub>DXA </sub>in the classification of osteoporosis. Osteoporosis was defined according to the World Health Organization criteria.</p> <p>Results</p> <p>In post-menopausal women, the prevalence of osteoporosis based on femoral neck <it>T</it><sub>VN </sub>was 29%, but when the diagnosis was based on <it>T</it><sub>DXA</sub>, the prevalence was 44%. In men aged 50+ years, the <it>T</it><sub>VN</sub>-based prevalence of osteoporosis was 10%, which was lower than <it>T</it><sub>DXA</sub>-based prevalence (30%). Among 177 women who were diagnosed with osteoporosis by <it>T</it><sub>DXA</sub>, 35% were actually osteopenia by <it>T</it><sub>VN</sub>. The kappa-statistic was 0.54 for women and 0.41 for men.</p> <p>Conclusion</p> <p>These data suggest that the <it>T-</it>scores provided by the Hologic QDR4500 over-diagnosed osteoporosis in Vietnamese men and women. This over-diagnosis could lead to over-treatment and influence the decision of recruitment of participants in clinical trials.</p
Decreased Bone Mineral Density in Adults Born with Very Low Birth Weight: A Cohort Study
Petteri Hovi and colleagues evaluate skeletal health in 144 adults born preterm with very low birth weight and show that as adults these individuals have significantly lower bone mineral density than do their term-born peers
Long-acting antipsychotic drugs for the treatment of schizophrenia: use in daily practice from naturalistic observations
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