1,721,074 research outputs found
Fatigue strength of a clutch pedal made of reprocessed short glass fibre reinforced polyamide
No full textThe crystal structure refinement of a natural mordenite
No full textNatural mordenite (Na1.49K2.80Mg0.04Ca2.05Sr0.05)(Al8.98Si39.13)O96.29.07H2O from Elba, Italy is orthorhombic, space group Cmc21, with a 18.094(1), b 20.516(1), and c 7.524(1) Å; Z = 1. The structure was refined in its hydrated form to Rw = 5.2%. The atom O(8) is not set on an inversion center and the T-O(8)-T angle is not constrained to 180°. The Si/Al distribution is partially ordered, with an enrichment of Al in the tetrahedra of the 4-membered ring. All Ca ions are localized in a 8-coordinated site; K ions alternate with H2O mols. in a 6-coordinated site. At. coordinates are given
Comments on Truffle Aroma Analysis by Headspace Solid Phase Microextraction [Is butylated hydroxytoluene (BHT) a "natural "volatile constituent of truffles?]
No full textGC-MS represents a powerful analytical thecnique that allows a quick and easy determination of VOCs. But the great deal of structural data should be examined critically in order to avoid mistakes
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
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