1,720,974 research outputs found
Api e Ambiente - Manuale operativo
No full textL’inquinamento ambientale e le recenti emergenze sanitarie connesse alla cattiva gestione del territorio (es. diossina, esaclorocicloesano, neonicotinoidi, etc.) negli ultimi periodi hanno avuto particolare risonanza nell’opinione pubblica. In particolare, si è evidenziata l’esigenza di monitorare con più attenzione l’ambiente che ci circonda ai fini di una maggior tutela della salute delle api, degli altri animali e dell’uomo. Stiamo infatti assistendo da anni ad una progressiva consapevolezza dell’importanza della qualità dell’ambiente per la tutela della salute pubblica e dell’ecosistema in generale. In questo contesto sono più spesso gli animali ad evidenziare precocemente la contaminazione ambientale e, fra questi, le api hanno dimostrato una particolare sensibilità. Negli ultimi anni il monitoraggio con le api ha assunto maggior importanza per le sue caratteristiche di semplicità gestionale, economicità e maggior efficacia di rilevazione rispetto ai metodi tradizionali, fondamentalmente incentrati sulle centraline fisse per il monitoraggio della qualità dell’aria. Le api, infatti, sono in grado di monitorare la qualità dell’ambiente in maniera accurata per un raggio di azione fino a 3 Km dalla ubicazione degli alveari di origine grazie a specifici fenomeni di bio-accumulo. L’impiego dell’ape quale Sistema Sentinella Animale è ormai una pratica consolidata ed ha dimostrato di ottenere una efficace rappresentazione della salubrità ambientale grazie alle caratteristiche etologiche e comportamentali del super-organismo alveare che permettono un costante contatto con l’ambiente circostante.
Con le presenti linee guida vogliamo puntualizzare i principali aspetti metodologici per l’impiego delle api e dei prodotti dell’alveare nel monitoraggio ambientale. In particolare, ci riferiamo alle modalità di gestione degli alveari, alla individuazione della matrice di elezione da utilizzare rispetto al contaminante target, nonché le modalità di campionamento, trasporto ed analisi dei campioni
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
Capsaicin-induced apoptosis of glioma cells is mediated by TRPV1 vanilloid receptor and requires p38 MAPK activation
No full textWe provide evidence on the expression of the transient receptor potential vanilloid type-1 (TRPV1) by glioma cells, and its involvement in capsaicin (CPS)-induced apoptosis. TRPV1 mRNA was identified by quantitative RT-PCR in U373, U87, FC1 and FLS glioma cells, with U373 cells showing higher, and U87, FC1 and FLS cells lower TRPV1 expression as compared with normal human astrocytes. By flow cytometry we found that a substantial portion of both normal human astrocytes, and U87 and U373 glioma cells express TRPV1 protein. Moreover, we analyzed the expression of TRPV1 at mRNA and protein levels of glioma tissues with different grades. We found that TRPV1 gene and protein expression inversely correlated with glioma grading, with marked loss of TRPV1 expression in the majority of grade IV glioblastoma multiforme. We also described that CPS trigger apoptosis of U373, but not U87 cells. CPS-induced apoptosis involved Ca(2+) influx, p38 but not extracellular signal-regulated mitogen-activated protein kinase activation, phosphatidylserine exposure, mitochondrial permeability transmembrane pore opening and mitochondrial transmembrane potential dissipation, caspase 3 activation and oligonucleosomal DNA fragmentation. TRPV1 was functionally implicated in these events as they were markedly inhibited by the TRPV1 antagonist, capsazepine. Finally, p38 but not extracellular signal-regulated protein kinase activation was required for TRPV1-mediated CPS-induced apoptosis of glioma cells
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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