1,721,004 research outputs found
Primary structure of the major glycan from human seminal transferrin.
No full textHuman seminal transferrin (HSmT) is an iron-containing glycoprotein whose structural properties have not been adequately investigated. The carbohydrate content of the purified glycoprotein amount to 6.1%, and monosaccharide analysis revealed the major oligosaccharide moiety to be of the N-glycoside type. The carbohydrate chains were released from the iron-free form by digestion with peptide N-glycosidase F (PNGase F) in the presence of detergents such as SDS and beta-octylglucoside. After ethanol precipitation and fractionation on Bio-Gel P-6 and Bio-Gel P-2, the oligosaccharide was further purified on Mono-Q and desalted on Bio-Gel P-2. By 600-MHz 1H-NMR spectroscopy, the primary structure of the major N-linked oligosaccharide component was established to be: [formula: see text
Optimization-based synthesis of time-modulated arrays with accurate time-frequency analysis
No full textThe synthesis of time-modulated arrays (TMAs) is carried out by means of a customized implementation of the Particle Swarm Optimization (PSO), carefully taking into account in the analysis block the non-linear characteristics of the radio-frequency (RF) switches used in antenna beamforming network and the mutual coupling effects between the array elements. A set of numerical results are reported and discussed in a comparative fashion with those obtained with a state-of-the-art method limited to deal with ideal TMAs
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
On the Key-Role of EM Skins in Building a Smart Electromagnetic Environment
No full textThe rapidly emerging Smart Electromagnetic Environment (SEME) paradigm is expected to revolutionize the design and the deployment of future wireless communications systems. In such a framework, electromagnetic skins (EMSs) will play a key-role to enable an almost-arbitrary “tailoring” of the complex EM interactions arising within a wireless propagation scenario. This invited talk is aimed at providing a showcase of some of the most recent developments in this field as well as an overview of the envisaged future trends according to the authors' vision
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