177,999 research outputs found
Michigan.
No full textFiled with Wheat Maps without a number.; Above lower neat line at right: R. Haring.; Excludes most of Upper Peninsula.; From: Almy, J. and Bostwick, E.B. State, Michigan to Emigrants. New York: I.F. Oliver, 1845
Utility of arsenic-treated bird skins for DNA extraction
No full textBackground: Natural history museums receive a rapidly growing number of requests for tissue samples from preserved specimens for DNA-based studies. Traditionally, dried vertebrate specimens were treated with arsenic because of its toxicity and insect-repellent effect. Arsenic has negative effects on in vivo DNA repair enzymes and consequently may inhibit PCR performance. In bird collections, foot pad samples are often requested since the feet were not regularly treated with arsenic and because they are assumed to provide substantial amounts of DNA. However, the actual influence of arsenic on DNA analyses has never been tested. Findings: PCR success of both foot pad and body skin samples was significantly lower in arsenic-treated samples. In general, foot pads performed better than body skin samples. Moreover, PCR success depends on collection date in which younger samples yielded better results. While the addition of arsenic solution to the PCR mixture had a clear negative effect on PCR performance after the threshold of 5.4 μg/μl, such high doses of arsenic are highly unlikely to occur in dried zoological specimens. Conclusions: While lower PCR success in older samples might be due to age effects and/or DNA damage through arsenic treatment, our results show no inhibiting effect on DNA polymerase. We assume that DNA degradation proceeds more rapidly in thin tissue layers with low cell numbers that are susceptible to external abiotic influences. In contrast, in thicker parts of a specimen, such as foot pads, the outermost horny skin may act as an additional barrier. Since foot pads often performed better than body skin samples, the intention to preserve morphologically important structures of a specimen still conflicts with the aim to obtain optimal PCR success. Thus, body skin samples from recently collected specimens should be considered as alternative sources of DNA
Comic-haftes bei Keith Haring
No full textNoch bis zum 30. August zeigt die Kunsthalle der HypoVereinsbank in München Keith Haring — Gegen den Strich. Mit dieser umfangreichen Ausstellung wird in Deutschland erstmals der Künstler Haring im Kontext seines politischen Gedankens thematisiert. Die von Dieter Buchhart kuratierte Schau war bereits in Paris (2013) und San Francisco (2014/15) zu sehen und gastiert nun in München. ((Zur Geschichte der Ausstellung vgl. Diederen, Roger; Ansenk, Emily: Vorwort, in: Kat. Ausst. Keith Haring — Geg..
Rcovid-19
No full textWeergave van de actuele R waarde per land op basis van de gegevens van ECDC. De app berekent de actuele R waarde over het 7-daags gemiddelde van het aantal cases zoals gerapporteerd door landen aan de European Centre for Disease Prevention and Control. Daarnaast berekent de app het verwachte aantal cases op basis van de berekende R-waarde
Knot theory in handlebodies
No full textWe consider oriented knots and links in a handlebody of genus g through appropriate braid representatives in S-3, which are elements of the braid groups B-g,B-n. We prove a geometric version of the Markov theorem for braid equivalence in the handlebody, which is based on the L-moves. Using this we then prove two algebraic versions of the Markov theorem. The first one uses the L-moves. The second one uses the Markov moves and conjugation in the groups B-g,B-n. We show that not all conjugations correspond to isotopies
Appropriate 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
Apps in der digitalen Prävention und Gesundheitsförderung
No full textAlbrecht U-V, von Jan U. Apps in der digitalen Prävention und Gesundheitsförderung. In: Haring R, ed. Gesundheitswissenschaften. Springer Reference Pflege – Therapie – Gesundheit. 2nd ed. Berlin, Heidelberg: Springer ; 2022: 1-9
Risk Factors and Comorbidities for Occasional and Daily Smoking in European Adolescents: Results of the Seyle Project
No full textEuropean Congress of Psychiatry (EPA 2015) (23º. 2015. Viena)Banzer, R; Haring, C; Buchheim, A; Oehler, S; Carli, V; Hoven, CW; Wasserman, C; Sarchiapone, M; Kaess, M; Apter, A; Balazs, J; Bobes, J; Brunner, R; Corcoran, P; Cosman, D; Kahn, JP; Postuvan, V; Varnik, A; Wasserman, D
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Going 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
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