1,721,100 research outputs found
MONO AND BIDIMENSIONAL H-1-NMR AND INVERSE-DETECTED C-13 NMR OF THE DUPLEX D(CA)3-CENTER-DOT-D(TG)3
No full textThe unambiguous assignment of the aromatic protons of the duplex d(CA)3.d(TG)3 was carried out with the aid of HMQC and HMBC inverse detected C-13 NMR experiments at T = 278 K. The NOE connections of these protons with the imino protons of the complementary bases - established by 2D NOESY experiments - indicated that the duplex is characterized by a canonical Watson-Crick base-pairing pattern. Monodimensional H-1 NMR experiments, also carried out at T = 278 K, in the presence of varying amounts of NaCl and with water suppression by presaturation and by spin echo techniques, showed that the imino protons of the TA and CG pairs of the duplex exchange with water through a process of local base pair opening and with different exchange rates
Studio Conformazionale di Diadi e Triadi del Poly(3-n-Esiltiofene)
No full textE' presentato uno studio conformazionale sulle diadi e le triadi del poly(3-esiltiofene) basato su misure NMR e calcoli teorici
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
- …
