1,721,018 research outputs found
Room-Temperature Hydrodehalogenation of Halogenated Heteropentalenes with One or Two Heteroatoms
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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
Effect of Limonene on the Frontal Ring Opening Metathesis Polymerization of Dicyclopentadiene
No full textThe frontal ring opening metathesis polymerization (FROMP) of dicyclopentadiene (DCPD) in the presence of limonene, using second generation Grubbs' catalysts, is reported. The effect of limonene on the amount of catalyst and the typical frontal polymerization parameters, as maximum temperature (Tmax) and velocity of the front (Vf), is studied. In addition, the influence of limonene on the mechanical properties of the polymeric samples is reported. Finally, a deep study on the swelling properties of polymers is done. It has been demonstrated that limonene acts as both inhibitor and solvent of the catalyst. The Tmax, Vf, Tg, and Young modulus values decrease as the amount of limonene increases, and the polymer samples swell in THF depending on the amount of limonene. All results indicate that the limonene addition on FROMP of results in advantages on the polymerization reaction and its parameters and on the final polymer properties
Accrescimento in long-line di Mytilus galloprovincialis Lmk. nello stagno di Calich (Sardegna Nord-occidentale)
No full textThe Mediterranean mussel Mytilus galloprovincialis (Bivalvia, Mytilidae) was long-line cultured in two different areas of the Calich lagoon (NW Sardinia, Italy). Several physical and chemical water parameters, chlorophyll a and sedimentation rate were measured in the two culture stations and in a third considered as a control. Mussel growth rate was similar in the two stations. It was positively affected by the increase of water temperature and chlorophyll a concentration and negatively by oxygen depletion
Suspended culture of Ostrea edulis (Bivalvia, Ostreidae) in the Calich lagoon (North western Sardinia, Italy): preliminary results
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