1,720,961 research outputs found
Anesthesia and analgesia in breast surgery: the benefits of peripheral nerve block
Full text linkBreast surgery is frequently associated with postoperative pain, nausea and vomiting, that result in increased patient's suffering, prolongation of hospital stays and related costs. Thoracic paravertebral nerve block (TPVB) is a viable option to the classic multimodal analgesia in breast surgery as it enhances surgical anesthesia and postoperative analgesia. In this review, we report the results of a number of studies on the role of TPVB in breast surgery. This technique is associated with a superior control of the pain, a reduction in opioids consumption after surgery, a decrease in postoperative nausea and vomiting, and an overall decrease in length of hospital stay. In particular, TPVB seems to provide the most benefits in patients undergoing an unilateral or bilateral mastectomy followed by immediate reconstruction. Some studies also suggest that the use of regional anesthesia-analgesia could attenuate perioperative immunosuppression and minimize metastases in breast cancer patients. TPVB can be also coupled with other regional anesthetic techniques such as pectoral nerve block (PNB), thus increasing the reduction in postsurgical pain, opioids consumption and length of hospital stays
Charge Transfer in Molecular Cocrystals: A Plane Wave vs Localized-Orbital View─Structural Information Obtained from Calculated Raman and IR Phonons
Full text linkThis article aims at laying the foundation for the development of electronic structure-property relationships in the field of charge-transfer (CT) organic semiconductors by studying the low-frequency phonon response of donor-acceptor (DA) compounds. In this article, it is shown and discussed how and why phonon frequencies and their delocalization depend on the interplay between single-molecule properties and crystal structures. These results are obtained by combining results from state-of-the-art quantum-mechanical calculations, carried out within both localized orbitals and a plane wave paradigm, with simple classical models. CT compounds obtained from perylene (Pery) as the donor and FnTCNQ (n = 0, 4) as the acceptors are considered
Analytic procedure for the evaluation of copper intermetallic diffusion in electroplated gold coatings with energy dispersive X-ray microanalysis
Full text linkImmunocytochemical and ultrastructural changes of islet cells in rats treated long-term with cyclosporine at immunotherapeutic doses
No full textBehavior of several hemodynamic parameters during anesthesia with propofol in experimental orthotopic transplant of the liver]
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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
Variations on the Author
Full text link“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
Full text linkWe 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
Clarifying the mechanism of actions of suppressor, brightener and sodium chloride in acid copper electrodeposition: A multidisciplinary approach for a many variable problem
No full textL'elettrodeposizione acida del rame (AC) è ancora un processo fondamentale per molti campi, dall'industria elettronica a quella decorativa. Inoltre, la galvanica AC è un passaggio necessario per i cicli di produzione senza Ni che stanno diventando di tendenza data la crescente consapevolezza della tossicità dei sali Ni2+. I bagni AC all'avanguardia sono formulati con un set di tre additivi organici, necessari per ottenere rivestimenti con adeguate caratteristiche meccaniche e ottiche. Tuttavia, nonostante l’uso diffuso di queste sostanze, il loro meccanismo d’azione e il ruolo di NaCl durante la deposizione non sono chiaramente definiti. È stato impiegato un approccio multidisciplinare per ottenere approfondimenti sul meccanismo d'azione degli additivi organici sulla superficie del Cu. Questo approccio si basa sull'analisi elettrochimica al microscopio elettronico supportata da tecniche basate sui raggi X e calcoli e simulazioni computazionali. Un campo elettrico è stato incluso nella dinamica molecolare per approfondire le interazioni tra le specie attive all'interno dell'elettrodeposizione.Acid copper (AC) electrodeposition still a cardinal process for many fields, from electronic to decorative industries. Moreover, AC electroplating is a necessary step for Ni-free production cycles which are trending given the increased awareness of the toxicity of Ni2+ salts. State-of-the-art AC baths are formulated with a set of three organic additives, which are needed to achieve coatings with proper mechanical and optical features. However, despite the widespread use of these substances, their mechanism of action and the role of NaCl during the deposition are not clearly defined. A multidisciplinary approach has been employed to obtain insights on the mechanism of action of the organic additives on the Cu surface. This approach is based on electron microscopy electrochemical analysis supported by X-ray based techniques and computational calculations and simulations. An electrical field was included in molecular dynamics to delve the interactions between active species within the electrodeposition
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