13,282 research outputs found
Notes on the Life Histories of \u3ci\u3eAcrosternum Hilare\u3c/i\u3e and \u3ci\u3eCosmopepla Bimaculata\u3c/i\u3e (Heteroptera: Pentatomidae) in Southern Illinois
The life histories of Acrosternum hilare and Cosmopepla bimaculata were studied in southern Illinois from May 1972 to September 1974 and from September 1992 to June 1995. Both species were bivoltine, overwintered as adults, and became active in early spring. The subsequent generations were characterized by marked overlapping of the nymphal instars. No active adults were found after early November
Resurvey of the Pentatomoidea (Heteroptera) of the La Rue-Pine Hills Research Natural Area in Union County, Illinois
A resurvey of the Pentatomoidea of the La Rue-Pine Hills Research Natural Area was conducted from September 1992 to June 1995 and the results compared with those of an earlier survey by McPherson and Mohlenbrock (1976). Sampling during the resurvey was limited to the 17 collecting sites of the earlier survey, thus permitting comparisons of the flora and fauna in the two studies. Notes were taken on the times of occurrence of adult and immature stages and on the food plants.
Of the 49 pentatomoid species and subspecies included in the original survey, 36 were collected during the resurvey. Of the 13 not collected, 12 were rare and one, Holcostethus limbolarius (Stål), was relatively common during the original survey. Two additional species, Galgupha ovalis Hussey and Corimelaena obscura McPherson and Sailer, were added to the list, the latter because it was described as new subsequent to the original survey. The most noticeable change in the vegetation that accounted for differences in pentatomoid diversity and abundance was the marked reduction in abundance of common mullein, Verbascum thapsus L.
The resurvey showed that 11 of the 17 sites had changed in character and plant composition, seven because of woody invasion and four because of the influence of exotic and invasive species; the remaining six had changed little. Exotic plant species have become an increasingly prominent component of the vegetative communities
An Annotated List of Phytophagous Insects Collected on Immature Black Walnut Trees in Southern Illinois
An annotated list of phytophagous insects on immature black walnut in southern Illinois was compiled between 26 April, 1974, and 9 October, 1975. Approximately 300 species, in 10 orders, were collected by hand-picking and sweeping. Notes taken on the various species included types of feeding damage, instars present, predators and parasites, and distribution in southern Illinois. Lepidoptera (about 80 species collected) were responsible for the majority of damage observed
Descriptions of Nymphal Instars of \u3ci\u3eAbedus Breviceps\u3c/i\u3e (Hemiptera: Belostomatidae)
The 1st-5th instars of Abedus breviceps Still, collected from a Texas population, are described and illustrated. They can be separated most easily by overall body length and width, and by the length of the mesonotal wing pads
Obesity and cancer: existing and new hypotheses for a causal connection
Existing explanations of obesity-associated cancer emphasise direct mutagenic effects of dietary components or hormonal imbalance. Some of these hypotheses are reviewed briefly, but recent evidence suggests a major role for chronic inflammation in cancer risk, possibly involving dietary content. These ideas include the inflammation-induced activation of the kynurenine pathway and its role in feeding and metabolism by activation of the aryl hydrocarbon receptor (AHR) and by modulating synaptic transmission in the brain. Evidence for a role of the kynurenine pathway in carcinogenesis then provides a potentially major link between obesity and cancer. A second new hypothesis is based on evidence that serine proteases can deplete cells of the tumour suppressors Deleted in Colorectal Cancer (DCC) and neogenin. These enzymes include mammalian chymotryptic proteases released by pro-inflammatory neutrophils and macrophages. Blood levels of chymotrypsin itself increase in parallel with food intake. The mechanistically similar bacterial enzyme subtilisin is widespread in the environment, animal probiotics, meat processing and cleaning products. Simple public health schemes in these areas, with selective serine protease inhibitors and AHR antagonists and could prevent a range of intestinal and other cancers
Are Hospital Pharmacies More Efficient if They Employ Nurses?
This paper assesses the efficiency of utilizing nurses in Washington State hospital pharmacies. We take the perspective of a pharmacy department manager and model an input oriented hospital pharmacy production process. Data envelopment analysis (DEA) is used to examine both scale efficiency and technical efficiency, and differences across hospital pharmacies that use and do not use nurse staffing are analyzed using cross-tabulations and nonparametric hypothesis tests. The results indicate that the use of nurse staffing does not significantly impact either scale or technical efficiency. Thus, permitting nurses to play a greater role in hospital pharmacies does not adversely affect efficiency. This paper has important policy implications for hospital administrators and pharmacists.
Material technology
Advanced high pressure O2/H2 propulsion systems as exemplified by the Space Shuttle Main Engine (SSME) create challenging operating environments for materials. Many components operate in either hydrogen or hydrogen-steam environments which may significantly degrade the performance of common alloys. The objective of the materials technology projects is to develop and evaluate candidate materials for application in advanced high pressure O2/H2 propulsion systems. These new and improved materials are to improve the durability or performance of the SSME or derivative engine. The program includes projects on the following topics: (1) Hydrogen Resistant Alloys; (2) High Pressure O2 Ignition and Burning; (3) Improved Turbine Blades; (4) Improved Turbine Disk Material; (5) Impact Reactivity in High Pressure O2; and Fiber Reinforced Superalloys
Sports-related brain injury in the general population: An epidemiological study
Objectives
To determine the incidence, nature and severity of all sports-related brain injuries in the general population.
Design
Population-based epidemiological incidence study.
Methods
Data on all traumatic brain injury events sustained during a sports-related activity were extracted from a dataset of all new traumatic brain injury cases (both fatal and non-fatal), identified over a one-year period in the Hamilton and Waikato districts of New Zealand. Prospective and retrospective case ascertainment methods from multiple sources were used. All age groups and levels of traumatic brain injury severity were included. Details of the registering injuries and recurrent injuries sustained over the subsequent year were obtained through medical/accident records and assessment interviews with participants.
Results
Of 1369 incident traumatic brain injury cases, 291 were identified as being sustained during a sports-related activity (21% of all traumatic brain injuries) equating to an incidence rate of 170 per 100,000 of the general population. Recurrent injuries occurred more frequently in adults (11%) than children (5%). Of the sports-related injuries 46% were classified as mild with a high risk of complications. Injuries were most frequently sustained during rugby, cycling and equestrian activities. It was revealed that up to 19% of traumatic brain injuries were not recorded in medical notes.
Conclusions
Given the high incidence of new and recurrent traumatic brain injury and the high risk of complications following injury, further sport specific injury prevention strategies are urgently needed to reduce the impact of traumatic brain injury and facilitate safer engagement in sports activities. The high levels of ‘missed’ traumatic brain injuries, highlights the importance in raising awareness of traumatic brain injury during sports-related activity in the general population
Electrophysiologic assessment of (central) auditory processing disorder in children with non-syndromic cleft lip and/or palate
Session 5aPP - Psychological and Physiological Acoustics: Auditory Function, Mechanisms, and Models (Poster Session)Cleft of the lip and/or palate is a common congenital craniofacial malformation worldwide, particularly non-syndromic cleft lip and/or palate (NSCL/P). Though middle ear deficits in this population have been universally noted in numerous studies, other auditory problems including inner ear deficits or cortical dysfunction are rarely reported. A higher prevalence of educational problems has been noted in children with NSCL/P compared to craniofacially normal children. These high level cognitive difficulties cannot be entirely attributed to peripheral hearing loss. Recently it has been suggested that children with NSCLP may be more prone to abnormalities in the auditory cortex. The aim of the present study was to investigate whether school age children with (NSCL/P) have a higher prevalence of indications of (central) auditory processing disorder [(C)APD] compared to normal age matched controls when assessed using auditory event-related potential (ERP) techniques. School children (6 to 15 years) with NSCL/P and normal controls with matched age and gender were recruited. Auditory ERP recordings included auditory brainstem response and late event-related potentials, including the P1-N1-P2 complex and P300 waveforms. Initial findings from the present study are presented and their implications for further research in this area —and clinical intervention—are outlined. © 2012 Acoustical Society of Americapublished_or_final_versio
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