1,721,063 research outputs found
Mid-term outcome of reductive Kay annuloplasty of the tricuspid valve in association with mitral valve surgery.
No full textMid-term outcome of reductive Kay annuloplasty of the tricuspid valve in association with mitral valve surgery.. In INTERACTIVE CARDIOVASCULAR AND THORACIC SURGERY
Nardi, P; Pellegrino, A; Nicolò, F; Zeitani, J; Grego, S; Polisca, P; Scafuri, A; Chiariello, L
Sustainable water treatment and chlorine production in emergency conditions in South Iraq
No full textWater purification in the Middle East crisis: a survey on WTP and CU in Basrah (Iraq) area within a research and development program
No full textPhosgene-free carbamoylation of aniline via dimethyl carbonate
Full text linkThe synthesis of N-phenylcarbamate from aniline and dimethyl carbonate (DMC) in the presence of homogeneous, supported heterogeneous, and heterogeneous catalysts was investigated in batch conditions. First, a selection of homogeneous catalysts was studied and their reactivity in the same reaction conditions was compared to zinc acetate, a catalyst extensively used for this reaction. Then the best homogeneous catalysts were supported on silica or alumina, and the resulting heterogeneous supported catalysts were tested for the carbamoylation of aniline.
Finally, several heterogeneous catalysts were investigated. Zinc carbonate basic was shown to be the best catalyst, giving quantitative conversion and selectivity for the N-phenylcarbamate. Its catalytic activity was fully investigated taking into account substrate concentration, amount of catalysts, and temperature influence. Zinc carbonate was also shown to be recyclable, once it was recovered from the reaction mixture and calcinated
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
MISURAZIONE, DISTRIBUZIONE, MOBILITA’ DELL’ ARSENICO IN SUOLO PROVENIENTE DA UN SITO EX MINERARIO
No full textSostanza organica e proprietà biochimiche degli orizzonti pedogenetici in due suoli del Sud Italia
No full textArsenico nel suolo di un ex sito minerario: misurazione, distribuzione, effetti sul pool microbico.
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