1,720,994 research outputs found
The evolutionary unified scheme. I. Quasars and radio galaxies in the viewing angle-redshift plane
No full textWe present a study of the distribution of quasars and radio galaxies in the viewing-angle-redshift plane in the framework of the evolutionary unified scheme (Vagnetti, Giallongo, and Cavaliere 1991). Results are presented for some illustrative cases, including a distribution of the Lorentz factors and appropriate luminosity functions for quasars and their host galaxies. A cosmologically increasing [Gamma] is found, in agreement with the previous paper. It is argued that the appearance of sources as quasars or radio galaxies can depend on the viewing angle and on the redshift, due to the balance between the beamed component and the luminosity of the host galaxy. Within the assumptions of our evolutionary unified scheme, we find that low-Gamma objects can be observed as quasars mainly at z greater than or similar to 0.3, while a substantial fraction of the low-z radio galaxies could consist of quasar remnants
Un laboratorio emotivo in età scolare per la gestione dell’aggressività, delle prepotenze tra coetanei e per l’integrazione delle diversità
No full textELECTROCHEMICAL DEPOSITION OF NICKEL AND NICKEL-THALLIUM COMPOSITE OXIDES FILMS FROM EDTA SOLUTIONS.
No full textAn anodic electrodeposition procedure of nickel hydroxide and oxyhydroxide species using an alkaline bath containing 5 mM Ni2+ and 5 mM ethylenediaminotetraacetic acid as a ligand compound is described. The positive effect of thallium oxides and Tl+ on the rate of nickel deposition was estimated. In the presence of thallium species, the electrodeposition process of nickel oxide species is located at lower positive potentials of about 100-150 mV. The XPS analysis of nickel-thallium composite films, revealed the presence of Tl2O3. Tl2O, Ni(OH)(2) and NiOOH, with an average composition independent of the specific electrochemical deposition procedure (i.e., potentiostatic, potentiodynamic or galvanostatic techniques)
SpADS and SNAP-NAPPA Microarrays towards Biomarkers Identification in Humans: Background Subtraction in Mass Spectrometry with E.coli Cell Free Expression System
No full textWe present a useful approach towards for biomarkers identification in an innovative self-assembling protein microarray based on “Nucleic Acid Programmable Protein Array” (NAPPA) and SNAP tag coupled to E.coli cell free expression system. This approach prove capable to resolve the “background” problem associated to the above label free detection system for the identification of proteins and of protein-protein interaction in humans that could become used in clinical practice
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
Modeling of autothermal methane steam reforming. Comparison of reactor configurations
No full textIn the present work, two systems for the coupling of methane steam reforming and methane combustion have been studied and compared. In the first system considered, the two reactions are thermally coupled but take place in separate volumes. Particular attention has been placed on the choice of operating conditions in order to maximize the efficiency and safety of the process. The second system considered consists in a modification of the process of autothermal reforming, distributing the oxygen feed to the reactor along its axis. The results obtained have been compared with the performance of a reactor in which the oxidation reaction is carried out by injecting oxygen in different points along the reactor. The performance of the two systems has been compared with that of an autothermal reformer, in which the entire oxygen feed is mixed with steam and methane entering the reactor. The analysis of the different systems has focused on the temperature profiles that develop within the reactors, the amount of hydrogen produced per mole of methane fed, and the possibility of carrying out the process without entering flammability limits
NAPPA-Based Nanobiosensors for the Detection of Proteins and of Protein-Protein Interactions Relevant to Cancer
No full text- …
