359 research outputs found
Uranium(VI) Bis(imido) Chalcogenate Complexes: Synthesis and Density Functional Theory Analysis
Leadership Styles and Innovative Entrepreneurship: An International Study
This research attempts to empirically examine the relationship between leadership styles and innovative entrepreneurship through regression analysis, using a sample of 43 countries and data from Global Entrepreneurship Monitor and Global Leadership and Organizational Behavior Effectiveness. In light of institutional approaches and specifically based on the normative dimension, the main findings of the study indicate that participative leadership and higher education represent the strongest explanatory factor in the variance of the current rates of innovative entrepreneurship. This study has contributions for both researchers and policymakers on new firm creation (entrepreneurship) and on the generation of innovation within organizations (intrapreneurship).Stefan van Hemmen acknowledges the financial resources from ECO2013-48496-C4-4-R (Spanish Ministry of Economy & Competitiveness) and 2014-SGR-1259 (Economy & Knowledge Department -Catalan Government-). Marta Peris-Ortiz acknowledges support from the Universitat Politecnica de Valencia through the project Paid-06-12 (Sp 20120792). Claudia Alvarez and David Urbano acknowledge the financial support from the Projects ECO2013-44027-P (Spanish Ministry of Economy & Competitiveness) and 2014-SGR-1626)Economy & Knowledge Department -Catalan Government-).Van Hemmen, S.; Alvarez, C.; Peris-Ortiz, M.; Urbano, D. (2015). Leadership Styles and Innovative Entrepreneurship: An International Study. Cybernetics and Systems. 46(3-4):271-286. https://doi.org/10.1080/01969722.2015.1012896S271286463-
The presentation, diagnosis and management of non-traumatic wrist pain: an evaluation of current practice in secondary care in the UK NHS
AbstractObjectivesThe study aims were to assess the burden of non-traumatic wrist pain in terms of numbers of referrals to secondary care, and to characterise how patients present, are diagnosed and are managed in secondary care in the United Kingdom National Health Service.MethodsTen consecutive patients presenting with non-traumatic wrist pain were identified retrospectively at each of 16 participating hospitals and data was extracted for twelve months following the initial referral.ResultsThe 160 patients consisted of 100 females and 60 males with a median age of 49, accounting for approximately 13% of all new hand/wrist referrals. The dominant wrist was affected in 60% of cases and the mean symptom duration was 13.3 months. Diagnoses were grouped into: osteoarthritis (OA) (31%), tendinopathy (13%), ganglion (14%), ulnar sided pain (17%) and other (25%). The OA group was significantly older than other groups, while other groups contained a predominance of females.The non-surgical interventions in decreasing frequency of usage were: steroid injections (39%), physiotherapy (32%), splint (31%) and analgesics (12%). Of those who underwent surgery, all patients had previously received non-surgical treatment, however 42% had undergone only one non-surgical intervention.ConclusionNon-traumatic wrist pain represents a significant burden to secondary care both in terms of new patient referrals and in terms of investigation, follow up and treatment. Those presenting with osteoarthritis are more likely to be older and male, while those presenting with other diagnoses are more likely to be younger and female
Plasmodium falciparum Merozoite Invasion Is Inhibited by Antibodies that Target the PfRh2a and b Binding Domains
Plasmodium falciparum, the causative agent of the most severe form of malaria in humans invades erythrocytes using multiple ligand-receptor interactions. The P. falciparum reticulocyte binding-like homologue proteins (PfRh or PfRBL) are important for entry of the invasive merozoite form of the parasite into red blood cells. We have analysed two members of this protein family, PfRh2a and PfRh2b, and show they undergo a complex series of proteolytic cleavage events before and during merozoite invasion. We show that PfRh2a undergoes a cleavage event in the transmembrane region during invasion consistent with activity of the membrane associated PfROM4 protease that would result in release of the ectodomain into the supernatant. We also show that PfRh2a and PfRh2b bind to red blood cells and have defined the erythrocyte-binding domain to a 15 kDa region at the N-terminus of each protein. Antibodies to this receptor-binding region block merozoite invasion demonstrating the important function of this domain. This region of PfRh2a and PfRh2b has potential in a combination vaccine with other erythrocyte binding ligands for induction of antibodies that would block a broad range of invasion pathways for P. falciparum into human erythrocytes
'Let the Right Ones In!': Widening Participation, Academic Writing and the Standards Debate in Higher Education
This paper challenges the frequently expressed concern, post-1992, that widening participation (WP) has contributed to a general ‘dumbing down’ of higher education in English universities *(Burke, 2005; Leathwood, 2010). In particular, it explores the implications of a long-standing ‘moral panic’ (Cohen,
1972) about the poor quality of students’ academic writing, particularly in the ‘new’ universities, which have been raised in various academic reports and countless media articles. A vampire metaphor is used throughout the paper to highlight ways in which assumptions about these falling standards in undergraduates’ academic writing feed on the foundations of a longstanding, albeit implicit, distrust of the growth in the sector on elitist, ideological grounds.
The second half of the paper investigates how academic writing practices, whilst difficult to define, nonetheless wield a ‘disciplinary power’ (Foucault, 1980), over lecturers and students in the academy. This includes a discussion about how a situated, New Literacy Studies (NLS) approach to academic writing development challenges the view that students’ academic writing standards are falling. In contrast, the paper suggests that all universities have a responsibility to acknowledge and develop the different literacies that students, especially widening participation students, bring with them to university.
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Targeting Sialic Acid Dependent and Independent Pathways of Invasion in Plasmodium falciparum
The pathology of malaria is a consequence of the parasitaemia which develops through the cyclical asexual replication of parasites in a patient's red blood cells. Multiple parasite ligand-erythrocyte receptor interactions must occur for successful Plasmodium invasion of the human red cell. Two major malaria ligand families have been implicated in these variable ligand-receptor interactions used by Plasmodium falciparum to invade human red cells: the micronemal proteins from the Erythrocyte Binding Ligands (EBL) family and the rhoptry proteins from the Reticulocyte binding Homolog (PfRH) family. Ligands from the EBL family largely govern the sialic acid (SA) dependent pathways of invasion and the RH family ligands (except for RH1) mediate SA independent invasion. In an attempt to dissect out the invasion inhibitory effects of antibodies against ligands from both pathways, we have used EBA-175 and RH5 as model members of each pathway. Mice were immunized with either region II of EBA-175 produced in Pichia pastoris or full-length RH5 produced by the wheat germ cell-free system, or a combination of the two antigens to look for synergistic inhibitory effects of the induced antibodies. Sera obtained from these immunizations were tested for native antigen recognition and for efficacy in invasion inhibition assays. Results obtained show promise for the potential use of such hybrid vaccines to induce antibodies that can block multiple parasite ligand-red cell receptor interactions and thus inhibit parasite invasion
Bioavailability of prednisolone tablets
Two fourtreatment crossover studies were performed using 12 adult male volunteers in each with seven different commercially available prednisolone tablets. Plasma samples were assayed for prednisolone by a radioimmunoassay method. Statisacal analyses of the data, by analysis of variance for crossover design (ANOVA), showed no significant differences among the treatment averages at any of the sampling times except at 0.25 and 4 hr in one of the studies. There were also no significant differences among the treatment averages for peak plasma level, time of peak plasma level, area 0–12 hr, area 0–24 hr, and the halflife of elimination of prednisolone. We conclude that the average plasma concentrations of prednisolone are superimposable in a statistical sense and that the tablets tested are bioequivalent. Results of dissolution studies of six tablets of each of the seven lots of prednisolone tablets, using deaerated water in the spin filter apparatus, are presented.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/45072/1/10928_2005_Article_BF01065399.pd
An EGF-like Protein Forms a Complex with PfRh5 and Is Required for Invasion of Human Erythrocytes by Plasmodium falciparum
Invasion of erythrocytes by Plasmodium falciparum involves a complex cascade of protein-protein interactions between parasite ligands and host receptors. The reticulocyte binding-like homologue (PfRh) protein family is involved in binding to and initiating entry of the invasive merozoite into erythrocytes. An important member of this family is PfRh5. Using ion-exchange chromatography, immunoprecipitation and mass spectroscopy, we have identified a novel cysteine-rich protein we have called P. falciparum Rh5 interacting protein (PfRipr) (PFC1045c), which forms a complex with PfRh5 in merozoites. Mature PfRipr has a molecular weight of 123 kDa with 10 epidermal growth factor-like domains and 87 cysteine residues distributed along the protein. In mature schizont stages this protein is processed into two polypeptides that associate and form a complex with PfRh5. The PfRipr protein localises to the apical end of the merozoites in micronemes whilst PfRh5 is contained within rhoptries and both are released during invasion when they form a complex that is shed into the culture supernatant. Antibodies to PfRipr1 potently inhibit merozoite attachment and invasion into human red blood cells consistent with this complex playing an essential role in this process
Business angel investment activity in the financial crisis: UK evidence and policy implications
The 2008 financial crisis has transformed the financial environment for small and medium-sized enterprises, resulting in significant declines in the availability of bank lending and venture capital. This has prompted government intervention to improve the availability of debt and equity capital. Whereas there are comprehensive statistics on bank lending and venture capital investments, equivalent information on business angel investment activity is lacking. This paper draws upon three sources of evidence on business angel investment activity in the UK—business angel networks, Scottish angel groups, and individual angels—to reveal for the first time how the angel market has fared during the early stage of the financial crisis. While the evidence is not entirely consistent, it is clear that angel investment activity has held up since the onset of the financial crisis. This further emphasises the economic significance of business angels and underlines the need for ongoing government support. Policy options are reviewed
An examination of the factorial and convergent validity of four measures of conspiracist ideation, with recommendations for researchers
A number scales have been developed to measure conspiracist ideation, but little attention has been paid to the factorial validity of these scales. We reassessed the psychometric properties of four widely-used scales, namely the Belief in Conspiracy Theories Inventory (BCTI), the Conspiracy Mentality Questionnaire (CMQ), the Generic Conspiracist Beliefs Scale (GCBS), and the One-Item Conspiracy Measure (OICM). Eight-hundred-and-three U. S. adults completed all measures, along with measures of endorsement of 9/11 and anti- vaccination conspiracy theories. Through both exploratory and confirmatory factor analysis, we found that only the BCTI had acceptable factorial validity. We failed to confirm the factor structures of the CMQ and the GBCS, suggesting these measures had poor factorial valid- ity. Indices of convergent validity were acceptable for the BCTI, but weaker for the other measures. Based on these findings, we provide suggestions for the future refinement in the measurement of conspiracist ideation
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