1,721,005 research outputs found
Late in-stent thrombosis following carotid angioplasty and stenting
No full textAcute in-stent thrombosis is a well-known complication of carotid angioplasty and stenting (CAS) and often due to resistance to or inadequate treatment with platelet-inhibiting agents. The authors report three cases of a delayed in-stent thrombosis after more than a week but less than 3 months after CAS. In all cases, the postprocedural antiplatelet regimen was discontinued to enable the treatment of a relevant comorbidity
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Spatial memory and learning deficits after experimental pneumococcal meningitis in mice
No full textSurvivors of bacterial meningitis frequently suffer from long-term sequelae, particularly from learning and memory deficits. For this reason, spatial memory and learning was studied in a mouse model of ceftriaxone-treated Streptococcus pneumoniae meningitis. Persistent deficits of spatial learning despite normal motor function were observed in mice infected with 10(4) colony-forming units (CFU) in 25 mul of saline into the right forebrain in comparison to mice treated with an equal amount of saline. Survivors of meningitis performed significantly worse in memorizing a hidden platform in a Morris water maze. After 2 weeks, the difference between post-meningitis and control mice diminished. Yet, when the platform was moved after 180 days, learning of the new location was still strongly impaired in mice surviving meningitis. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Reduced release of DNA from Streptococcus pneumoniae after treatment with rifampin in comparison to spontaneous growth and ceftriaxone treatment
No full textIn order to study the release of DNA from Streptococcus pneumoniae in vitro during spontaneous growth and treatment with ceftriaxone or rifampin, a semiquantitative polymerase chain reaction was used. During spontaneous growth, high concentrations of bacterial DNA were released. Exposure to 10 mug/ml of ceftriaxone decreased the DNA release, in median, by 19 times (P=0.03 vs. spontaneous growth). Treatment with 10 mug/ml of rifampin led to a reduction of DNA release, in median, by a factor of 49 (P=0.03 vs. ceftriaxone; six experiments performed on different days)
D- and L-lactate in rabbit and human bacterial meningitis
No full textIncreased total CSF lactate is an important indicator differentiating bacterial from aseptic meningitis. Bacteria can produce D- and L-lactate; mammalian cells produce only L-lactate. We measured D- and L-lactate production of Streptococcus pneumoniae, Staphylococcus aureus, Neisseria meningitidis and Escherichia coli in vitro, of S. pneumoniae and E. coli in rabbit experimental meningitis and of various common pathogens in CSF from patients with bacterial meningitis. Despite marked in vitro production of D-lactate by S. aureus (maximum: 4.59 mmol/l; i.e. 34.9% of total lactate), N. meningitidis (4.62 mmol/l; i.e. 98.1%) and E. coli (3.14 mmol/l; i.e. 97.2%), minimal amounts were measured in human S. aureus (0.38 mmol/l; i.e. 1.3% of total lactate) or N. meningitidis (0.28 mmol/l; i.e. 3.9%) and experimental E. coli meningitis (0.75 mmol/l; i.e. 4.4%). In only 9 of 54 human CSF samples did D-lactate exceed 0.15 mmol/l. S. pneumoniae did not produce significant amounts of D-lactate in vitro (maximum; 0.55 mmol/l; i.e. 2.7% of total lactate), in experimental meningitis (0.18 mmol/l; i.e. 3%) or in human cases of meningitis (0.28 mmol/l; i.e. 1.9%). In conclusion, increased total CSF lactate in meningitis consists mainly of L-lactate and originates predominantly from host cells. CSF D-lactate is of limited diagnostic value
Reduced release of DNA from Streptococcus pneumoniae after treatment with rifampin in comparison to spontaneous growth and ceftriaxone treatment
No full textIn order to study the release of DNA from Streptococcus pneumoniae in vitro during spontaneous growth and treatment with ceftriaxone or rifampin, a semiquantitative polymerase chain reaction was used. During spontaneous growth, high concentrations of bacterial DNA were released. Exposure to 10 mug/ml of ceftriaxone decreased the DNA release, in median, by 19 times (P=0.03 vs. spontaneous growth). Treatment with 10 mug/ml of rifampin led to a reduction of DNA release, in median, by a factor of 49 (P=0.03 vs. ceftriaxone; six experiments performed on different days)
Moxifloxacin in experimental Streptococcus pneumoniae cerebritis and meningitis
No full textRifampin, a protein synthesis inhibitor, reduced mortality in a mouse model of meningitis compared to bacteriolytic cephalosporin standard therapy. To assess whether moxifloxacin (known to cause a less rapid bacteriolysis than cephalosporins) can similarly reduce mortality, mice infected with Streptococcus pneumoniae by deep intracerebral injection were treated subcutaneously with either 200 mg/kg of moxifloxacin or ceftriaxone every 8 hours for 5 days (n=49 each). They were then observed for an additional 8 days. Overall mortalities were 35 and 29 in moxifloxacin- and ceftriaxone-treated mice, respectively (p=0.29). Kaplan-Meier survival analysis also revealed no statistically significant differences (p=0.32). Moxifloxacin failed to reduce mortality compared to cephalosporin standard therapy
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