1,720,990 research outputs found
Dinamica molecolare ed NMR in soluzione: studio dell'equilibrio di isomerizzazionecis-transdel legame ammidico tyr-pro in peptidi a catena corta
Full text linkNella presente comunicazione verranno illustrati i risultati ottenuti dall’analisi
conformazionale di peptidi bioattivi del tipo:Tyr-ProTyr-Pro-PheTyr-Pro-Phe-Pro βCM4 Tyr-Pro-Phe-Pro-NH2 βCM4 ammideTyr-Pro-Phe-Pro-Gly βCM5Tyr-Pro-Phe-Pro-Gly-Pro-Ile βCM7Tyr-Pro-Phe-Pro-Gly-Pro-Ile-Pro βCM8Tyr-Pro-Phe-Pro-Gly-Pro-Ile-Pro-Asn-Ser-Leu βCM1
Large-scale Posidonia oceanica restoration in a Site of National Interest using an innovative bio-plastic transplant system
No full textAlong the Italian coasts there are many areas affected by industrial activities defined as "Sites of National Interest" (SNI), which require urgent and effective remediation and restoration actions. In the framework of TETIDE project (PON01_03112 www.progettotetide.it)a restoration program was developed in SNI Priolo(Sicily) in response to a dramatic decline and regression of Posidonia oceanicameadow, caused byseveral years of petrochemical industries dumping. In particular, a large scale P. oceanicarestoration plan was carried out in four steps: (1) habitat selection, by calculation of the Preliminary Transplant Suitability Index (PTSI); (2) field assessments and test-transplanting, to evaluate the site suitability; (3) identification of suitable restoration sites, by calculation of the Transplant Suitability Index (TSI); (4) finally, according to TSI results, a large P. oceanicatransplant was performed. Cuttings were anchored by using an innovative system (patented by Biosurvey Srl, Spin-off University of Palermo) made of a new generation bio-plastic (Mater-Bi), totally biodegradable after 5 -10 years in the field, maintaining the same physical characteristics of plastics.This system consists of a radial structure that can be anchored on the seabedby a picket. The structure is modular with five arms on which a variable number of clips for fixation of P. oceanicacuttings occurs. A total of 20’000 cuttings corresponding to about 70’000 shoots, were anchored at a depth of 12 m over 2’500 m2 of P. oceanicadead matte. After six months of monitoring, cuttings survival was 93.3 % with visible roots production, while mortality and detachment were about 1.7% and 5% respectively with a consequent slight decrease of shoot density. These results suggested that the modular bio-plastic system can be successfully employed for restoring damaged meadows allowing the natural anchoring of plants before structure degradation, without realising harmful residues in the environment
Detection and mapping of "blue carbon" reservoir storage in Posidonia oceanica dead matte in front of an extensive industrial area
No full textThe endemic Mediterranean seagrass Posidonia oceanica is the only marine phanerogam able to form matte, a biogenic structure representing important long-term “blue carbon” reservoir. Natural and/or anthropogenic factors can lead to the formation of a regressive structure, called “dead matte”, resulting from the disappearance of living shoots in the upper part of the matte. In the framework of TETIDE project (PON01_03112, www.progettotetide.it) a multiple sensors acoustic survey -multibeam sonar (MBS), side scan sonar (SSS), sub-bottom profiler (SBP) -was carried out in a portion of the Gulf of Augusta (Sicily, Southern Ionian Sea). The aim of investigation was to estimate the extent of dead mattethat are present in this area due to pollution from industrial activities over the last several decades. The investigated area covers a surface of about 141 ha from 3.5 m to 21.5 m of depth. MBS and SSS showed an irregular seabed morphology with rock, sand and dead mattestructures delimited by walls up to 2 m high. Dead mattecovers about 58 ha, corresponding to 41% of seabed. The seismo-acoustic data, recorded by SBP, allowed to estimate the thickness of the matteand then to calculate its volume per unit surface area of seabed. The volume of mattevaries from 0.83 m3/m2to 2.68 m3/m2with a mean value of 1.46 m3/m2. The total seabed surface affected by industrial activities concerns an area of about 3,000 ha. Considering the percentage of dead mattecoverage and its volume per unit surface area, a total volume of 18•106m3was estimated. From literature data, the amount of carbon storage inside the matteis 0.034 tons/m3on average, thus we extrapolated that total carbon accumulated is about 612 tons. These “blue carbon” reservoirs should be put into preserving in order to contrast their erosion and the consequent potentially massive CO2release into the atmosphere
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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