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L'ASPORTAZIONE DI CORPI ESTRANEI DALLO STOMACO E DAL DUODENO CON ENDOSCOPI A FIBRE OTTICHE
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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
[Changes of the pressoactive substance extractable from both kidneys of rats with hypertension induced by complete ligation of the aorta between the renal arteries]
No full textL'UTILITA' DELLA DIAGNOSI ENDOSCOPICA PER LA TERAPIA CHIRURGICA DELLE COLITI CRONICHE (RETTO-COLITE ULCEROSA E M. DI CROHN)
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A comparative evaluation of endoscopic retrograde cholangiopancreatography and the secretin-cholecystokinin test in the diagnosis of chronic pancreatitis: a multicentre study in 124 patients
No full textA comparative evaluation of ERCP and the bicarbonate output 30 min after stimulation of the pancreas with secretin and cholecystokinin-pancreozymin, was carried out in 124 patients, of whom 65 were affected by proven chronic pancreatitis (PCP), and 59 by only suspected chronic pancreatitis (SCP). In PCP patients the false negative results were 14.7% and 21.5%, respectively. In 5 of the PCP patients with false negatives on ERCP and functional test a normal result of both the procedures was found. ERCP and bicarbonate output were found to be abnormal in 12% and 40%, respectively of 59 patients with SCP. In 30 SCP subjects both procedures gave a normal result, and only in two cases were results abnormal. A correct classification of the SCP patients with pathological bicarbonate secretion and normal ERCP seems quite impossible. The diagnostic usefulness of ERCP results is preeminent but the of carrying out both types of investigation together may give complementary information in the evaluation of pancreatic disorders
COLONSCOPIC POLIPECTOMY AS EARLY DIAGNOSIS AND THERAPY OF LARGE BOWEL'S MALIGNANT TUMORS
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