105,248 research outputs found
Förderung des Sichtwortschatzes im sonderpädagogischen Schwerpunkt Geistige Ent-wicklung (SGE)
No full textTebbe M, Schäfer H. Förderung des Sichtwortschatzes im sonderpädagogischen Schwerpunkt Geistige Ent-wicklung (SGE). Lernen konkret. 2023;42(4):10-11
Olefin Metathesis in Cyclic Ether Formation. Direct Conversion of Olefinic Esters to Cyclic Enol Ethers with Tebbe-Type Reagents
No full textOlefin Metathesis in Cyclic Ether Formation.
Direct Conversion of Olefinic Esters to Cyclic Enol
Ethers with Tebbe-Type Reagent
Olefin Metathesis in Cyclic Ether Formation. Direct Conversion of Olefinic Esters to Cyclic Enol Ethers with Tebbe-Type Reagents
No full textOlefin Metathesis in Cyclic Ether Formation.
Direct Conversion of Olefinic Esters to Cyclic Enol
Ethers with Tebbe-Type Reagent
Rapid high-performance liquid chromatographic quantification of recombinant human antithrombin III during production and purification
No full textBüntemeyer H, Tebbe H, Lütkemeyer D, Lehmann J. Rapid high-performance liquid chromatographic quantification of recombinant human antithrombin III during production and purification. Journal of Chromatography, B: Biomedical Sciences and Applications. 1994;662(2):209-216.For monitoring of recombinant human antithrombin III during cell culture processes and subsequent purification steps a rapid method for quantitative determination was developed. The need for the introduction of this rapid method came from the limited availability of a quantitative enzyme-linked immunosorbent assay (ELISA) and the very time-consuming ELISA procedure. The developed method is based on reversed-phase high-performance liquid chromatography using a C 4 column. The separation by gradient elution using water and acetonitrile takes less than 20 min even when complex samples, such as serum containing cell culture samples, have to be analyzed. Automation and a high sample throughput are possible with this reliable method. If necessary, insulin, transferrin and albumin can also be quantified with minor changes of the elution profile
Multidisciplinary out-patient treatment with monitoring by telemedicine for a large-volume multifocal pyogenic liver abscess in times of the pandemic
No full textTebbe JJ, Kulamadayil-Heidenreich N-S-A, Heidenreich H, Bongartz H-G, Tebbe S. Multidisciplinary out-patient treatment with monitoring by telemedicine for a large-volume multifocal pyogenic liver abscess in times of the pandemic. Clinical Case Reports . 2021;9(10): e04970.Pyogenic liver abscesses represent one of the rarer, but potentially life-threatening diseases of the liver. The treatment for large-volume liver abscesses is usually multimodal with percutaneous drainage combined with several days of treatment in hospital. We are presenting a report on a male patient with type-2 diabetes mellitus who suffered from a multifocal liver abscess (>10 cm). Due to the exceptional situation caused by the corona pandemic, the patient was treated conservatively with non-standard treatment which involved a multidisciplinary team and out-patient visits. Follow-up to ensure the treatment would be successful was carried through dialogue with the GP responsible for the patient's care, as well as daily telemedicine visits. The daily telemedicine visits were supplemented by episodic follow-up testing of laboratory values and contrast-enhanced ultrasound scans (CEUS) of the liver. We show that purely conservative therapy can be successful in a case with a high risk of mortality by using a combination of close telemedical monitoring and proactive interdisciplinary collaboration with the GP
Chronic beta-blocker therapy in patients with coronary artery disease is without influence on plasma lipids: a multivariate analysis
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Chronic beta-blocker therapy in patients with coronary artery disease is without influence on plasma lipids: a multivariate analysis
No full textAppropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
