1,096 research outputs found

    Approaches to studying and study tactics of baccalaureate nursing students

    Get PDF
    This research was designed to describe study approaches and study tactics used by baccalaureate nursing students. Previous inquiry indicates that students will take a Deep, Strategic, or Surface approach to studying and will use specific study tactics to meet the demands of their learning contexts. The Approaches to Study Skills Inventory for Students (ASSIST) was administered to 174 students in Anatomy and Physiology, Pathophysiology, and Nursing Care of the Adult Client. Failing students were less likely to participate. The ASSIST bad acceptable internal consistency reliability and construct validity. A majority (55%) of students took a Strategic approach to studying; smaller proportions adopted Deep (26%) and Surface (19%) approaches. Deep and Strategic approach scores were positively correlated with final course grades, GPAs, study hours, and students\u27 ratings of their course performance. Surface approach was negatively correlated with the aforementioned variables. Age was positively correlated with Deep approach, but negatively correlated with Surface approach. Strategic approach was negatively correlated with hours of paid work. Study tactics were identified by interviewing 13 high, medium, and low achieving students. Students had varied conceptions of their learning contexts and what they did to prepare for exams. All students experienced lecture-style teaching methods and fact-based assessment. The predominant in-class activity was note-taking, conceptions of which were related to whether a note-taking handout was provided, year of study, and academic achievement. Year of study and academic achievement were related to what students did to prepare for exams and the number of study tactics they used, which ranged 1-5, the most frequent being notes review. It is concluded that Deep, Strategic, and Surface study approaches are related to academic factors and academic achievement. There are relationships between students\u27 conceptions of their learning contexts, what they do to learn and prepare for exams, year of study, use of study tactics, and academic achievement. Conclusions are limited by an under-representation of failing students. These findings have implications for the assessment and identification of students\u27 study approaches. Additional research is needed to describe the study tactics students choose and to determine how those tactics relate to academic achievement

    The stuff that affects you: Fiction, poetry, and doggerel

    Get PDF
    Inevitably writers write about the stuff that affects them. Maybe the stuff that affects them is life-altering, or in some way profound or sublime, like untimely death, divorce, or being in love. Or maybe it\u27s the mundane stuff, like marbles, cats, crows, weeds, wind, rain, or riding a bike. This thesis includes fiction, poetry, and light verse (which I prefer to call doggerel) triggered by all of that stuff, but I\u27ve twisted and embellished it beyond the literal or whole truth, until what remains is nothing but the truth

    Clinical and pathologic characteristics of T-cell lymphoma with a leukemic phase in a raccoon dog (Nyctereutes Procyonoides)

    Get PDF
    A 7.5-year-old raccoon dog (Nyctereutes procyonoides) from the Henry Doorly Zoo (Omaha, Nebraska) presented to the veterinary hospital for lethargy and weight loss. On physical examination, splenomegaly and hepatomegaly were noted on palpation and were confirmed by radiographic evaluation. Radiography also demonstrated a mass in the cranial mediastinum. A complete blood cell count revealed marked leukocytosis (115,200 cells/microl), with a predominance of lymphoid cells. The animal was euthanized due to a poor prognosis. Necropsy revealed splenomegaly, hepatomegaly, and a large multiloculated mass in the cranial mediastinum. The histologic and immunohistochemical diagnosis was multicentric T-cell lymphoma with a leukemic phase.published_or_final_versio

    The transcriptional regulator GalR self-assembles to form highly regular tubular structures

    Get PDF
    The Gal repressor regulates transport and metabolism of D-galactose in Escherichia coli and can mediate DNA loop formation by forming a bridge between adjacent or distant sites. GalR forms insoluble aggregates at lower salt concentrations in vitro, which can be solubilized at higher salt concentrations. Here, we investigate the assembly and disassembly of GalR aggregates. We find that a sharp transition from aggregates to soluble species occurs between 200 and 400 mM NaCl, incompatible with a simple salting-in effect. The aggregates are highly ordered rod-like structures, highlighting a remarkable ability for organized self-assembly. Mutant studies reveal that aggregation is dependent on two separate interfaces of GalR. The highly ordered structures dissociate to smaller aggregates in the presence of D-galactose. We propose that these self-assembled structures may constitute galactose-tolerant polymers for chromosome compaction in stationary phase cells, in effect linking self-assembly with regulatory function

    Organismal benefits of transcription speed control at gene boundaries

    Get PDF
    RNA polymerase II (RNAPII) transcription is crucial for gene expression. RNAPII density peaks at gene boundaries, associating these key regions for gene expression control with limited RNAPII movement. The connections between RNAPII transcription speed and gene regulation in multicellular organisms are poorly understood. Here, we directly modulate RNAPII transcription speed by point mutations in the second largest subunit of RNAPII in Arabidopsis thaliana. A RNAPII mutation predicted to decelerate transcription is inviable, while accelerating RNAPII transcription confers phenotypes resembling auto‐immunity. Nascent transcription profiling revealed that RNAPII complexes with accelerated transcription clear stalling sites at both gene ends, resulting in read‐through transcription. The accelerated transcription mutant NRPB2‐Y732F exhibits increased association with 5′ splice site (5′SS) intermediates and enhanced splicing efficiency. Our findings highlight potential advantages of RNAPII stalling through local reduction in transcription speed to optimize gene expression for the development of multicellular organisms.SynopsisRNAPII mutations that accelerate transcription cause auto‐immunity‐like phenotypes, read‐through transcription at RNAPII stalling sites and enhanced splicing in Arabidopsis, indicating that controlled transcription speed is required for optimal gene expression and plant development.A point mutation in RNAPII that increases the speed of RNAPII transcription triggers auto‐immunity‐like phenotypes.plaNET‐seq reveals reduced RNAPII stalling at gene boundaries in fast transcription mutants.Increasing the speed of transcription reduces the efficiency of transcriptional termination, resulting in read‐through transcription that blurs the spatial separation of genes.Accelerating RNAPII transcription enhances splicing efficiency in the multi‐cellular context.RNAPII mutations that accelerate transcription cause auto‐immunity‐like phenotypes, read‐through transcription at RNAPII stalling sites and enhanced splicing in Arabidopsis, indicating that controlled transcription speed is required for optimal gene expression and plant development.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154978/1/embr201949315-sup-0001-EVFigs.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154978/2/embr201949315.reviewer_comments.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154978/3/embr201949315.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154978/4/embr201949315_am.pd

    Haemorrhagic Colitis Associated with Enterohaemorrhagic \u3ci\u3eEscherichia coli\u3c/i\u3e O165:H25 Infection in a Yearling Feedlot Heifer

    Get PDF
    Introduction: Enterohaemorrhagic Escherichia coli (EHEC) cause haemorrhagic colitis and haemolytic uraemic syndrome in humans. Although EHEC infection typically results in haemorrhagic colitis in all ages of human patients, in cattle it is usually limited to 1- to 5-week-old nursing calves. Case Presentation: A 1-year-old feedlot beef heifer was moribund with neurological signs and bloody diarrhoea. At necropsy, the colonic mucosa contained multiple grossly visible haemorrhagic erosions, each measuring \u3c1 mm in diameter. Histologically, foci corresponding to the gross erosions had E. coli O165 antigen-positive bacterial rods adherent to the apical surfaces of degenerate and necrotic colonic mucosal epithelial cells in association with attaching and effacing lesions, and also within cytoplasmic vacuoles in some of these cells. An E. coli O165:H25 strain was isolated from the colonic mucosal tissue, and by microarray analysis was found to contain virulence genes corresponding to type III secretion system (T3SS) structure and regulation (cesD, cesT, escD, escF, escN/escV, escR, escT, ler, sepL, sepQ), T3SS effectors (espA, espB, espC, espD, espD, espF, espH, espJ, nleB, nleC, nleD, nleH, tir), serine proteases (eatA, espC, espP), Shiga toxin (stx2), EHEC-haemolysin (ehxA), and adhesins [intimin-ε (eae-ε), type 1 fimbria (fimA, fimB, fimH), type IV pili (pilA, pilB, pilC, pilM, pilP, pilQ) and non-fimbrial adhesin (efa1/lifA)]. Conclusion: To the best of our knowledge, this is the first report of disease in cattle associated with EHEC O165:H25 infection, the oldest bovine EHEC disease case with isolation of the pathogen and the first bovine case to demonstrate grossly evident, haemorrhagic, colonic mucosal erosions associated with EHEC infection

    Haemorrhagic Colitis Associated with Enterohaemorrhagic \u3ci\u3eEscherichia coli\u3c/i\u3e O165:H25 Infection in a Yearling Feedlot Heifer

    Get PDF
    Introduction: Enterohaemorrhagic Escherichia coli (EHEC) cause haemorrhagic colitis and haemolytic uraemic syndrome in humans. Although EHEC infection typically results in haemorrhagic colitis in all ages of human patients, in cattle it is usually limited to 1- to 5-week-old nursing calves. Case Presentation: A 1-year-old feedlot beef heifer was moribund with neurological signs and bloody diarrhoea. At necropsy, the colonic mucosa contained multiple grossly visible haemorrhagic erosions, each measuring \u3c1 mm in diameter. Histologically, foci corresponding to the gross erosions had E. coli O165 antigen-positive bacterial rods adherent to the apical surfaces of degenerate and necrotic colonic mucosal epithelial cells in association with attaching and effacing lesions, and also within cytoplasmic vacuoles in some of these cells. An E. coli O165:H25 strain was isolated from the colonic mucosal tissue, and by microarray analysis was found to contain virulence genes corresponding to type III secretion system (T3SS) structure and regulation (cesD, cesT, escD, escF, escN/escV, escR, escT, ler, sepL, sepQ), T3SS effectors (espA, espB, espC, espD, espD, espF, espH, espJ, nleB, nleC, nleD, nleH, tir), serine proteases (eatA, espC, espP), Shiga toxin (stx2), EHEC-haemolysin (ehxA), and adhesins [intimin-ε (eae-ε), type 1 fimbria (fimA, fimB, fimH), type IV pili (pilA, pilB, pilC, pilM, pilP, pilQ) and non-fimbrial adhesin (efa1/lifA)]. Conclusion: To the best of our knowledge, this is the first report of disease in cattle associated with EHEC O165:H25 infection, the oldest bovine EHEC disease case with isolation of the pathogen and the first bovine case to demonstrate grossly evident, haemorrhagic, colonic mucosal erosions associated with EHEC infection

    Why some stems are red: cauline anthocyanins shield photosystem II against high light stress

    Get PDF
    Red-stemmed plants are extremely common, yet the functions of cauline anthocyanins are largely unknown. The possibility that photoabatement by anthocyanins in the periderm reduces the propensity for photoinhibition in cortical chlorenchyma was tested for Cornus stolonifera. Anthocyanins were induced in green stems exposed to full sunlight. PSII quantum yields (ФPSII) and photochemical quenching coefficients were depressed less in red than in green stems, both under a light ramp and after prolonged exposures to saturating white light. These differences were primarily attributable to the attenuation of PAR, especially green/yellow light, by anthocyanins. However, the red internodes also had less chlorophyll and higher carotenoid:chlorophyll ratios than the green, and when the anthocyanic periderm was removed, small differences in the ФPSII of the underlying chlorenchyma were retained. Thus, light screening by cauline anthocyanins is important, but is only part of a set of protective acclimations to high irradiance. Hourly measurements of ФPSII on established trees under natural daylight indicated a possible advantage of red versus green stems under sub-saturating diffuse, but not direct sunlight. To judge the wider applicability of the hypothesis, responses to high light were compared for red and green stems across five further unrelated species. There was a strong, linear, interspecific correlation between photoprotective advantage and anthocyanin concentration differences among red and green internodes. The photoprotective effect appears to be a widespread phenomenon
    corecore