1,720,980 research outputs found
Diet only and diet plus simvastatin in the treatment of heterozygous familial hypercholesterolemia in childhood
No full textThis study was a I-year clinical study on 16 (7 males and 9 females) pediatric patients with heterozygous familial hypercholesterolemia treated with hypocholesterolemic diet only or with diet plus drug (simvastatin 10 mg/day). According to the study protocol, the children were submitted to a 3-month washout (free diet). Then they were given a diet (American Heart Association, step 2) for 6 months. After 6 months they were divided into two groups matched for sex, age and body mass index (BMI). Diet only was given to group A (n=8); simvastatin (10 mg/daily) was given to group B, for 1 year. All patients were examined at baseline, and monitored for safety during the study by pediatricians. All patients were submitted to noninvasive cardiovascular examinations (exercise electrocardiogram, echocardiography). After 12 months of treatment with simvastatin, total cholesterol (TC) and low density lipoprotein cholesterol (LDLC) showed a statistically significant reduction (group B). The decrease of TC and LDLC in patients on diet only was 4% and 3% (ali) and 17% and 4% (group A) after 6 and 12 months, respectively
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Pattern of red blood cells and platelets cholesterol and fatty acids in homozygous familial hypercholesterolemic patients treated with LDL-apheresis
No full textTwo homozygous familial hypercholesterolemic patients were treated with dextransulfate cellulose LDL-apheresis (DSC-LDL/A). We evaluated qualitatively and quantitatively, red cell and platelets membrane cholesterol and fatty acids, before and after LDL-apheresis. Fatty acids and cholesterol of red blood cells and platelets were determined by gaschromatographic technique. We failed to observe any quantitative or qualitative modification, as far as the youngest patient (MD) is concerned. Only in the oldest patient (SM), docosaesanoic acid (22:6) values, were significantly reduced by LDL-A on quantitative basis. In the same patient, also mirystic acid (14:0) values, were significantly decreased as determined by qualitative method. The above mentioned fatty acids were significantly changed in platelets on treatment with LDL-apheresis performed on weekly basis
Effect of L-carnitine on plasma lipoprotein fatty acids pattern in patients with primary hyperlipoproteinemia
No full textPURPOSE: To investigate the effect of L-carnitine (L-C) administration on plasma lipoprotein fatty acids pattern in patients with primary hyperlipoprotinemia. PATIENTS AND METHODS: The effect of L-C on plasma lipoprotein fatty acids pattern was investigated in 24 male and female hyperlipoproteinemic patients, aged 51.3 +/- 7.8 years (lipoprotein phenotypes: IIb and IV, WHO, 1970). After hypolipidemic diet (P, 22%; C, 48%; L, 30%; S, 10%; M, 10%; PV, 10%, cholesterol < 300 mg/d) lasting 30 days, L-C was given at a daily dosage of 1 g t.i.d. for 90 days. RESULTS: Plasma total polyunsaturated to saturated fatty acids ratio (8/5) showed a statistically significant increase after L-C (baseline: 0.74 +/- 0.2, vs 120 days: 0.84 +/- 0.2; p < or = 0.03). A statistically significant decrease of HDLs 16:0 (baseline: 28.1 +/- 4.2 vs 120 days: 26.4 +/- 3.7; p < or = 0.002), HDL3s 16:0 (baseline: 28.6 +/- 4.5 vs 120 days: 26.9 +/- 3.6; p < or = 0.001) and VLDLs 14:0 (baseline: 2.0 +/- 0.8 vs 120 days: 1.6 +/- 0.6; p < or = 0.02), specular to a statistically significant increase of VLDL's 18:2 (baseline: 21.9 +/- 5.1 vs 120 days: 24.3 +/- 4.9; p < or = 0.01), was also observed. Plasma levels of total cholesterol and LDL-cholesterol were reduced after one month. Plasma apolipoprotein AI and B levels were significantly increased after 30 and 60 days of treatment with L-C. CONCLUSIONS: A less atherogenic plasma lipoprotein fatty acids profile was observed after 120 days of combined treatment with diet and L-C
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Iperlipoproteinemia e rischio di osteoporosi: studio clinico su un gruppo di pazienti ambulatoriali in età perimenopausale
No full textAorta and Coronary Angiographic Follow-up of Children with Severe Hypercholesterolemia Treated with LDL Apheresis
No full textBACKGROUND: In this single-center, nonrandomized, prospective study, 11 children with severe genetic hypercholesterolemia, without previous cardiovascular disease events, were treated with low-density lipoprotein apheresis (LDLa). STUDY DESIGN AND METHODS: LDLa was given every 1 or 2 weeks for 2 to 17 years. Clinical cardiovascular events and coronary revascularization, as well as aortic and coronary angiographic findings and ejection fractions, were serially evaluated for 2 to 17 years. RESULTS: Total cholesterol (TC) and LDL cholesterol levels at baseline were 826.1 ± 183.3 and 767.8 ± 181.9 mg/dL, respectively. After LDLa, these levels decreased to 122.6 ± 24.4 and 79.1 ± 20.7 mg/dL, respectively (both differences, p ? 0.001). There were no cardiac deaths, and 6 children were free from any coronary lesions. Nonfatal myocardial infarction was not observed, and coronary revascularization was not required in any patient. Regression of coronary stenosis in children with existing angiographically established lesions after treatment with LDLa was prospectively demonstrated. The statistical analysis applicable to a scoring model (overall atherogenic index [OAI]) highlighted a significant relation between values of 0 to 4 years relevant to the score (p ? 0.018) and a weaker significant statistic for the value of OAI between 0 and 2 years (p ? 0.03). The OAI score at baseline was significantly related to the basal values of TC (p = 0.015), LDL cholesterol (p = 0.015), and triglycerides (p = 0.01), but not of high-density lipoprotein cholesterol (p = 0.075) as demonstrated by the logistic regression analysis (Cox and Snell pseudo-R2 of 0.67). CONCLUSION: LDLa interrupted the development of new aortic and coronary lesions in the native arteries and prevented cardiac events and the need for coronary revascularization in children without previous cardiovascular disease events
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