169,710 research outputs found
Extrauterine growth restriction in preterm infants: growth patterns, nutrition and epigenetic markers. A pilot study
No full textBackground/Aims: IntraUterine (IUGR) and ExtraUterine Growth Restriction (EUGR) may induce reprogramming mechanisms, finalized to survive before and after birth. Nutritional factors and other environmental signals could regulate gene expression through epigenetic modification, but the molecular mechanisms involved are not yet well understood. Epigenetic mechanisms could be considered as a bridge between environmental stimuli and long lasting phenotype, acquired during the intrauterine life and the first weeks of life. Our aim was to investigate the relationship between growth patterns, nutritional determinants, and epigenetic pathways.
Methods: We enrolled 38 newborns admitted to Neonatal Intensive Care Unit (NICU) at University Hospital of Pisa. Gestational age at birth was 1 SD. We also evaluated DNA methylation of Imprinting Centre 1 (IC1) at birth and at discharge.
Results: We observed a decrease in SD of weight and head circumference mainly during the first weeks of life. We found a correlation between EUGR for weight and for head circumference and an increased IC1 methylation (p = 0.018 and p = 0.0028, respectively). We observed a relationship between reduced protein and lipid intake and IC1 hypermethylation (p = 0.009 and p = 0.043, respectively).
Conclusion: IC1 hypermethylation could be a reprogramming mechanism to promote a catch-up growth, by means of an increased Insulin-like growth factor 2 (IGF2) expression, that may have potential effects on metabolic homeostasis later in life
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Un altare a Portovenere e altre novità per il secondo soggiorno genovese di Silvio Cosini, tra Padova e Milano
No full textThis article presents three unpublished works in marble, two in high relief of Saint Peter and Saint Law-rence, surmounted by the Archangel Gabriel and the Annunciate Virgin, respectively, and a low relief figure of God the Father Blessing, set within a seventeenth-century altar in the church of San Lorenzo in Portovenere.
The sculptures are attributed to Silvio Cosini, an eccentric, itinerant and mysterious Pisan sculptor who was active during the first half of the 1500s in Tuscany, Liguria, the Veneto and Lombardy, and famous for his technical virtuosity. These reliefs, which look back to Cosini's activity in Padua during the project for the Arca del Santo (the Tomb of Saint Anthony; 1533-1537), and in the shadow of his friend Jacopo Sansovino, are related to the work he did during his second Genoese period (c.1540-1542), when he was in productive collaboration with Giovan Angelo Montorsoli in the decoration of the church of San Matteo. The author also follows the vicissitudes of the Portovenere altar, as seen through some marble pieces from an unknown dismantled altare now in Palazzo Picedi Benettini (now Gropallo) in Sarzana; and provides a summary, supported in part by new documents and a revision of early sources, of Cosini's career in his late years in Padua, north-western Tuscany, Genoa and Milan, where the sculptor died in December 1545
Extrafine formulation of beclomethasone dipropionate/formoterol fumarate/glycopyrronium bromide delivered via pressurized metered-dose inhaler in the treatment of asthma: a review
No full textIn the management of difficult-to-treat and severe asthma, the incorporation of a Long-Acting Muscarinic Antagonist (LAMA) into a regimen of Inhaled Corticosteroids plus Long-Acting β2 agonists (ICS/LABA) represents a viable add-on therapeutic strategy. Historically, this approach required the use of separate inhalers; however, the recent advent of “single-inhaler triple therapy” (SITT) provided a valuable alternative. One such formulation is the extrafine combination of beclomethasone dipropionate (BDP), fluticasone furoate (FF), and glycopyrronium bromide (GB), which is delivered via a single pressurized metered-dose inhaler (pMDI). Clinical trials, including the TRIMARAN and TRIGGER studies, alongside subsequent post-hoc analyses, have elucidated the benefits of this SITT at both 87/5/9 μg and 172/5/9 μg dosing regimens administered daily. Findings indicated a significant improvement in respiratory function and a reduction in the frequency of exacerbations among patients with uncontrolled asthma. The BDP/FF/GB SITT confirmed efficacy and safety across various ethnic groups (including Caucasian, Japanese, and Chinese populations) and across different age cohorts (adults and adolescents), although it still remains unapproved for individuals under 18 years of age. The use of a single pMDI facilitates the deposition of extra- fine particles from all three active ingredients in the small airways enhancing therapeutic effectiveness. Moreover, the consolidation of medications into one device may improve patients’ adherence by mitigating the risks associated with device mismanagement and ensuring optimal drug delivery. The cost-effectiveness analysis of the BDP/FF/GB SITT suggests favorable outcomes compared to traditional ICS/LABA and ICS/LABA plus tiotropium combinations. Additional data will be forthcoming from the ongoing real-life TRIMAXIMIZE observational study
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
A 0.12mm<sup>2</sup> Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C
No full text Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm 2 ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm 2 resistor-based sensor that uses a Wien-bridge (WB) filter to achieve 0.1 {circ} {C} (3 sigma) inaccuracy from - 40 {circ} {C} to 180 {circ} {C}. Compared to a state-of-the-art WB sensor [4], it occupies 6 × less area and achieves comparable relative accuracy over a 76% wider operating range. Session 10.3 Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
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