1,721,013 research outputs found
103. Sculture greche e romane di Cirene. Scritti di L. Polacco, L. Beschi, F. Bertocchi, G. Traversari, E. de Franchi, M. T. Fortuna, presentati da Carlo Anti
No full textChamoux François. 103. Sculture greche e romane di Cirene. Scritti di L. Polacco, L. Beschi, F. Bertocchi, G. Traversari, E. de Franchi, M. T. Fortuna, presentati da Carlo Anti. In: Revue des Études Grecques, tome 77, fascicule 366-368, Juillet-décembre 1964. pp. 579-580
Carlo Anti, Sculture greche e romane di Cirene. Scritti di L. Polacco, L. Beschi, F. Bertocchi, G. Traversari, E. de Franchi, M. T. Fortuna ; G. Traversari. Ualtorilievo di Afrodite a Cirene
No full textVerhoogen V. Carlo Anti, Sculture greche e romane di Cirene. Scritti di L. Polacco, L. Beschi, F. Bertocchi, G. Traversari, E. de Franchi, M. T. Fortuna ; G. Traversari. Ualtorilievo di Afrodite a Cirene. In: L'antiquité classique, Tome 31, fasc. 1-2, 1962. pp. 557-560
Carlo Anti, Sculture greche e romane di Cirene. Scritti di L. Polacco, L. Beschi, F. Bertocchi, G. Traversari, E. de Franchi, M. T. Fortuna ; G. Traversari. Ualtorilievo di Afrodite a Cirene
No full textVerhoogen V. Carlo Anti, Sculture greche e romane di Cirene. Scritti di L. Polacco, L. Beschi, F. Bertocchi, G. Traversari, E. de Franchi, M. T. Fortuna ; G. Traversari. Ualtorilievo di Afrodite a Cirene. In: L'antiquité classique, Tome 31, fasc. 1-2, 1962. pp. 557-560
Effects of Benazepril alone and in combinaton with hydrochlorothiazide in comparison with felodipine extended release in elderly patients with mild-to-moderate essential hypertension
No full textAutonomic effects of nicotine patch administration in habitual cigarette smokers: a double-blind, placebo-controlled study using spectral analysis of RR interval and systolic arterial pressure variabilities
No full textNicotine patch administration is often used to sustain tobacco abstinence in smoking-cessation programs. There is some concern regarding safety issues, as a consequence of the sympathomimetic action of nicotine. We used spectral analysis of RR interval and (noninvasive) systolic arterial pressure (SAP) beat-by-beat variabilities in a crossover double-blind design to assess the autonomic effects of cigarette smoking, of transdermal nicotine, and of placebo. The study group consisted of 27 heavy smokers (age 43 ± 2 years). The RR interval and its variability were significantly reduced in the smoking group, as compared with nicotine or placebo groups. The LF component of RR interval variability (in normalized units, nu), and the LF/HF ratio showed greatest values during smoking, as compared with placebo. Values of LF(RR) and LF/HF during nicotine patch treatment were slightly, but not significantly, greater than observed with placebo. No differences were observed in SAP and its variability components. The index α (a frequency domain measure of baroreflex gain) was minimal in the smoking period. Habitual cigarette smoking is associated with signs of sympathetic predominance in the autonomic control of the sinoatrial (SA) node. Nicotine patches produce only minor disturbances of autonomic regulation. This corroborates their safe use in smoking-cessation strategies
A controlled study of the autonomic changes produced by habitual cigarette smoking in healthy subjects
No full textObjectives: An increased sympathetic drive, in view of its proarrhythmic, proatherosclerotic, and prothrombotic actions, could contribute to the elevated cardiovascular risk of habitual smokers. However, the underlying mechanisms are still debated. In this study we address the hypothesis that spectral analysis of RR interval and systolic arterial pressure short-term variabilities may be used to assess the complex autonomic changes produced by habitual cigarette smoking. Methods: A cross-sectional design compared heavy (> 20 cigarettes/day) habitual smokers (n = 20; 40 + 3 years), with similar age controls. Spectral analysis of RR interval variability provided markers of the sympatho-vagal balance modulating the SA node, by way of the normalised low frequency (LF ≃ 0.10 Hz) and high frequency (HF ≃ 0.25 Hz) components. The LF component of systolic arterial pressure (SAP) variability assessed the sympathetic vasomotor modulation. The frequency domain index (α) measured the baroreflex gain of the SA node. Subjects were studied at rest, and during the sympathetic excitation produced by active standing. Results: In smokers LF(RR) was, at rest, greater than in controls (70.6 + 3.8 vs 46.0 ± 2.5 normalised units, nu); concurrently HF(RR) was reduced (22.1 ± 3.2 vs 42.0 ± 2.8 nu). Baroreflex gain and RR variance were also smaller in smokers. LF(SAP) was, instead, similar in the smokers and control groups. The standing induced increase in LF(RR) was blunted (P < 0.001) in smokers. Conclusions: Spectral analysis of RR interval and systolic arterial pressure variability indicates that habitual cigarette smoking induces selective alterations in neural control of the SA node. An increase at rest in markers of sympathetic modulation is accompanied by signs of reduced vagal drive and depressed baroreflex gain; while sympathetic vasomotor modulation appears similar in controls and smokers. Data are consistent with the hypothesis that autonomic alterations may contribute to the increased cardiovascular risk present in smokers
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
- …
