408 research outputs found

    The Use of Prescription Drugs for Academic Performance Enhancement in College Aged Students

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    100 students between the ages of 18-22 were surveyed at a small, private New England college in an effort to develop a better understanding of the use of stimulant medications by this population and to evaluate existing and potential policies surrounding such use. Finding revealed high rates of illicit use of such medications with 56% of the surveyed sample reporting to use during their college career and 94% responding that they were aware of such use on campus. A statistically significant relationship was identified between students that illicitly used the medications and students that believe the drugs were harmless. In addition, a significant relationship was also discovered between students that reported to believe the drugs were harmless and those that believed that they knew enough to safely use the medications. The results provide substantial evidence for a need for policies surrounding the illicit use of stimulant medications on college campuses. The drugs are viewed by students to be harmless but in reality they ethically, legally and most importantly physically dangerous to those that use them without a prescription. Colleges must make an effort to increase awareness of these medications and develop policies to control their use

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    Examining the benefits of the 340b drug discount program

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    The 340B Drug Discount Program required drug manufacturers to provide discounted outpatient drugs to health care organizations serving vulnerable patient populations to allow these institutions to offer more services to more people. As the 340B program expanded, controversy centered on which entities have benefited from the program. Many health care organizations sold 340B drugs to well-insured patients at full price and have thus been financially rewarded. Amendments to the program have permitted 340B providers to use contract pharmacies to dispense 340B medications, furthering the debate over which stakeholders are benefiting from the program. The purpose of this study was to determine which stakeholders benefited because of the 340B Drug Discount Program and what have been the drivers of recent changes to the program. The study used a literature review. One database aggregator and six academic databases were used to collect 70 total sources. These sources were reviewed and reduced to 39 sources, which were used in the written research. Of these, 20 sources were used in the Results section. Research showed that 340B eligible entities and contract pharmacies have financially benefited from the 340B program. Patient benefit has been indirect, as qualified providers have expanded service offerings and increased access to health care services. Regulatory reform, as well as profit potential, has driven the expansion of 340B as more providers have expanded eligible service lines. Although the goal of the 340B program has often been misconstrued, direct financial benefits to eligible providers have allowed for this expansion of access

    Diverse and Variable Community Structure of Picophytoplankton across the Laurentian Great Lakes

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    The Laurentian Great Lakes provide economic support to millions of people, drive biogeochemical cycling, and are an important natural laboratory for characterizing the fundamental components of aquatic ecosystems. Small phytoplankton are important contributors to the food web in much of the Laurentian Great Lakes. Here, for the first time, we reveal and quantify eight phenotypically distinct picophytoplankton populations across the Lakes using a multilaser flow cytometry approach, which distinguishes cells based on their pigment phenotype. The distributions and diversity of picophytoplankton flow populations varied across lakes and depths, with Lake Erie standing out with the highest diversity. By sequencing sorted cells, we identified several distinct lineages of Synechococcales spanning Subclusters 5.2 and 5.3. Distinct genotypic clusters mapped to phenotypically similar flow populations, suggesting that there may not be a clear one-to-one mapping between genotypes and phenotypes. This suggests genome-level differentiation between lakes but some degree of phenotypic convergence in pigment characteristics. Our results demonstrate that ecological selection for locally adapted populations may outpace homogenization by physical transport in this interconnected system. Given the reliance of the Lakes on in situ primary production as a source for organic carbon, this work sets the foundation to test how the community structure of small primary producers corresponds to biogeochemical and food web functions of the Great Lakes and other freshwater systems

    Genetic and systems level analysis of Drosophila sticky/citron kinase and dFmr1 mutants reveals common regulation of genetic networks

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    <p>Abstract</p> <p>Background</p> <p>In <it>Drosophila</it>, the genes <it>sticky </it>and <it>dFmr1 </it>have both been shown to regulate cytoskeletal dynamics and chromatin structure. These genes also genetically interact with Argonaute family microRNA regulators. Furthermore, in mammalian systems, both genes have been implicated in neuronal development. Given these genetic and functional similarities, we tested <it>Drosophila sticky </it>and <it>dFmr1 </it>for a genetic interaction and measured whole genome expression in both mutants to assess similarities in gene regulation.</p> <p>Results</p> <p>We found that <it>sticky </it>mutations can dominantly suppress a <it>dFmr1 </it>gain-of-function phenotype in the developing eye, while phenotypes produced by RNAi knock-down of <it>sticky </it>were enhanced by <it>dFmr1 </it>RNAi and a <it>dFmr1 </it>loss-of-function mutation. We also identified a large number of transcripts that were misexpressed in both mutants suggesting that <it>sticky </it>and <it>dFmr1 </it>gene products similarly regulate gene expression. By integrating gene expression data with a protein-protein interaction network, we found that mutations in <it>sticky </it>and <it>dFmr1 </it>resulted in misexpression of common gene networks, and consequently predicted additional specific phenotypes previously not known to be associated with either gene. Further phenotypic analyses validated these predictions.</p> <p>Conclusion</p> <p>These findings establish a functional link between two previously unrelated genes. Microarray analysis indicates that <it>sticky </it>and <it>dFmr1 </it>are both required for regulation of many developmental genes in a variety of cell types. The diversity of transcripts regulated by these two genes suggests a clear cause of the pleiotropy that <it>sticky </it>and <it>dFmr1 </it>mutants display and provides many novel, testable hypotheses about the functions of these genes. As both of these genes are implicated in the development and function of the mammalian brain, these results have relevance to human health as well as to understanding more general biological processes.</p

    Top-down control of visual sensory processing during an ocular motor response inhibition task

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    The study addressed whether top-down control of visual cortex supports volitional behavioral control in a novel antisaccade task. The hypothesis was that anticipatory modulations of visual cortex activity would differentiate trials on which subjects knew an anti- versus a pro-saccade response was required. Trials consisted of flickering checkerboards in both peripheral visual fields, followed by brightening of one checkerboard (target) while both kept flickering. Neural activation related to checkerboards before target onset (bias signal) was assessed using electroencephalography. Pretarget visual cortex responses to checkerboards were strongly modulated by task demands (significantly lower on antisaccade trials), an effect that may reduce the predisposition to saccade generation instigated by visual capture. The results illustrate how top-down sensory regulation can complement motor preparation to facilitate adaptive voluntary behavioral control

    Perfectionism and attitudes toward cognitive enhancers (“smart drugs”)

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    Perfectionism is a personality disposition characterized by exceedingly high standards of performance and pressure to be perfect which may incline students to take cognitive enhancers (“smart drugs”) to boost their academic performance. So far, however, no study has investigated the relationships of multidimensional perfectionism and attitudes toward cognitive enhancers. The present study investigated these relationships in 272 university students examining different dimensions of perfectionism. Results showed that socially prescribed perfectionism, perfectionist concerns and doubts, and perceived parental pressure to be perfect showed positive correlations with attitudes favoring the use of cognitive enhancers. In contrast, self-oriented perfectionism, perfectionist personal standards, and organization showed negative correlations. The findings suggest that perfectionism may play a role as both a risk factor for and a protective factor against using cognitive enhancers depending on what dimensions of perfectionism are regarded
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