1,721,009 research outputs found
Adsorption technologies and blood purification procedures: honoring Horst Klinkmann
No full textThe President of the World Apheresis Association (WAA) Prof. Horst Klinkmann was the Chairman of the International Program Committee and responsible with Dr. Jens Klinkmann for a scientific program of a high level in all aspects
Poczet członków honorowych polskiego towarzystwa nefrologicznego. Część XXXVII — Profesor Horst Klinkmann
No full textW obecnym numerze czasopisma „Forum Nefrologiczne — Edukacja” autorzy przedstawiają już 37. część serii publikacji dotyczących członków honorowych Polskiego Towarzystwa Nefrologicznego. Bohaterem poprzedniej pracy był wybitny amerykański uczony i lekarz pochodzenia kolumbijskiego, Profesor Saulo Klahr. Saulo Klahr ukończył studia medyczne w Bogocie w Kolumbii, ale dalszą swoją karierę zawodową kontynuował na znanym Uniwersytecie Waszyngtońskim w St. Louis w Stanach Zjednoczonych. Był powszechnie cenionym na całym świecie nefrologiem, o niezwykłym dorobku naukowym. Pełnił także wiele ważnych funkcji w międzynarodowych organizacjach i towarzystwach naukowych. Bohaterem 37. części pocztu jest wybitny niemiecki lekarz i uczony Profesor Horst Klinkmann. Profesor przez większość swojego niezwykle aktywnego życia zawodowego związany był z Uniwersytetem w Rostoku. Odbywał jednak także długie staże zagraniczne, m.in. w Stanach Zjednoczonych, czy w Szwecji. Pełnił i nadal pełni ważne funkcje w międzynarodowych towarzystwach, nie tylko nefrologicznych, oraz w redakcjach czasopism medycznych. Wielokrotnie przebywał w Polsce i współpracował z wieloma ośrodkami uniwersyteckimi w naszym kraju. Za swoją niezwykłą działalność naukową otrzymał liczne nagrody i wyróżnienia w wielu krajach na całym świecie, w tym w Polsce
Hemodialysis with Regenerated Cellulosic Membranes Does Not Reduce Plasma Selenium Levels in Chronic Uremic Patients.
No full textAbstract: Selenium (Se) is considered an essential and very important trace element for humans. Se blood levels are frequently low in end-stage renal disease (ESRD) patients, but very little has been established concerning the mechanisms that could modify Se status in uremia, including a supposed dialysis-mediated Se depletion. In order to verify whether hemodialysis (HD) can induce a loss of Se, thereby leading or contributing to a low plasma Se concentration, we investigated the effect of HD procedure with the most commonly used regenerated cellulosic membrane (Cuprophan) on plasma Se levels in 20 uremic patients on HD for 62.5 ± 49.4 months. Plasma Se levels were also determined in 15 chronic renal failure (CRF) nondialyzed patients and in 28 age-matched healthy controls. Se concentration was determined by atomic absorption spectrophotometry. Plasma Se levels of both HD patients (61.3 ± 8.5 μ/L) and CRF nondialyzed patients (56.4 ± 10.1 μg/L) were significantly lower than in normal subjects (78.3 ± 9.7 μg/L, p < 0.001). In CRF nondia-lyzed patients, a significant (p < 0.05) negative correlation was found between the plasma Se concentration versus serum creatinine values. Within the HD group, plasma Se levels significantly increased after the HD procedure (72.8 ± 17.2 μg/L, p < 0.02) together with hemat-ocrit and total plasma protein values (p < 0.05 and p < 0.001, respectively). In the hollow fiber dialyzer during an HD session, the Se concentration increased but not significantly from the blood inflow site (64.6 ± 12.5 μg/L) to the outflow site (72.6 ± 17 μg/L) and decreased, again not significantly, from the dialysate entrance (5 ± 1.9 μg/L) to the outlet (4.8 ± 2.5 μ?.). In HD with low-flux regenerated cellulosic dialyzer, very likely due to the high molecular weight of Se-binding proteins, the replacement treatment did not induce a Se loss in chronic uremic patients with a low plasma Se concentration
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
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
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