1,721,432 research outputs found
Carta della Vulnerabilità all'inquinamento degli acquiferi della Bassa Valle del Sarca (Trentino). STUDI TRENTINI DI SCI. NAT.
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The 35% CO2/65% O2 challenge test for Panic Disorder:optimization by Receiver Operating Characteristic (ROC) analysis. Journal of Psychiatric Research, 29: 111-119, 1995
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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
Classification of Healthy and Cancer Colon Cells Grown on Glass Coverslip by Means of Fourier Transform Infrared Spectroscopy and Multivariate Methods
No full textFor several years, Fourier transform infrared (FTIR) microspectroscopy has been proving to be very promising for use in cytological diagnostics because of its capability of providing rapid
and label-free biochemical information about cell samples. The adoption of FTIR as a clinical tool has been slowed because of the poor compatibility with cells deposited on glass slides, commonly used in
clinical practice, because of the absorption of IR radiation by glassy materials in the 1000–1800 cm-1 spectral range. However, the possibility of also obtaining diagnostic information from the IR absorption
spectra in the 2700–3700 cm-1 range (including few peaks related to vibrational modes in cell lipids and proteins) has recently emerged. In this work, we investigate the use of the FTIR technique in the 2700–3700 cm-1 range for diagnostic purposes about human colon cells grown on glass coverslips. In fact, using the principal components analysis (PCA) technique, we are able to discriminate FTIR spectra of healthy cells from those of cancerous ones, mainly due to the larger relative lipid content in the former compared to the latter. In addition, principal component analysis-linear
discriminate analysis (PCA-LDA) and partial least square-discriminant analysis (PLS-DA) were used to build classification models for unknown FTIR spectra with optimal accuracy. These results
support the promotion of the translation of the FTIR technique as a complementary diagnostic tool in cytological routine practice
Utilizzo della microspettroscopia Raman per valutare la sensitivit`a di cellule umane mammarie normali esposte ad un fascio di protoni a dosi cliniche.
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