1,721,031 research outputs found
Modelling of antenna radiation pattern of a re-entry vehicle in presence of plasmaIEEE Antennas and Propagation Society Symposium, 2004.
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AN ELECTRON-SPIN-RESONANCE EVIDENCE OF ALUMINA SURFACE REDUCTION IN RU/GAMMA-AL2O3 CATALYSTS
No full textGoing 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
Allele frequency of two intragenic microsatellite loci of SEL1L gene in Northern Italy population
Full text linkTwo cytosine-adenine (CA) repeats CAR/CAL and RepIN20 occur in the human SEL1L gene, which is regarded as a candidate gene for insulin-dependent diabetes mellitus (IDDM) and Grave's disease. We have characterized these repeats to determine if they might serve as effective microsatellite markers for linkage analysis to clarify whether SEL1L gene plays a role in the pathogenesis of these autoimmune diseases. The allele frequencies and average heterozygosity of the microsatellite repeats were analysed in 94 DNA samples from peripheral blood mononuclear (PBMC) cells from adults of Northern Italy. The average heterozygosity was 0.68 for CAR/CAL polymorphism and 0.85 for RepIN20. The size of PCR fragments of CAR/CAL ranged from 207–225 bp and the most frequent allele was 207 bp (40.4%). The size of the fragments of RepIN20 ranged from 237–255 bp and the most frequent allele was 249 bp (30.8%). In the light of the highly polymorphic nature of both microsatellites and their intragenic location in SEL1L gene, we suggest that they could provide a means for linkage analysis to clarify the potential role of SEL1L in conferring susceptibility to IDDM or Grave's disease
ELECTRON-SPIN-RESONANCE INVESTIGATIONS OF RUTHENIUM SUPPORTED ON GAMMA-ALUMINA
No full textWe report an electron spin resonance investigation performed on alumina-supported ruthenium, Ru/γ-Al2O3, obtained by decarbonylation (pyrolysis or H2 reduction) of Ru3(CO)12/γ-Al2O3. The spectra observed after Ru/γ-Al2O3 was in contact with O2, CO, NO 'probe' molecules allow one to distinguish superoxide, carbonyl and nitrosyl paramagnetic derivatives of ruthenium, and show that ruthenium centers in formal oxidation states other than the zero metal state become stable by interaction with γ-Al2O3. The strength of the interaction between paramagnetic ruthenium centres and π*-acceptor molecules (O2, CO and NO) is dependent both on the π*-acceptor molecules and on the decarbonylation method
Manuale di neuroftalmologia dell'età evolutiva. Classificazione, valutazione ed interventi terapaeutici negli esiti di cerebropatie congenite
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