1,721,154 research outputs found
Dagli scarti delle uve una risorsa per l'industria chimica: il progetto VALSOVIT
No full textIl progetto Valsovit - Valorizzazione sostenibile degli scarti della filiera vitivinicola per l’industria chimica e salutistica, è finanziato sul Bando POR FESR Emilia-Romagna ed è finalizzato alla valorizzazione di seconda generazione dei sottoprodotti per la produzione di sostanze ad alto valore aggiunto (bioplastiche, intermedi di sintesi, biogas) sfruttando tecnologie a basso impatto ambientale
Microreattori monolitici polistirenici funzionalizzati con carbeni N‐eterociclici per lo studio di reazioni di unpolung stereoselettive
No full textMethylsulfinyl (Dimsyl) Anion as Umpolung Catalyst for the Chemoselective Cross Benzoin Reaction of α-Diketones with Aldehydes
No full textBlood esterase inhibition in birds as an index of organophosphorus contamination: field and laboratory studies
No full textWith the aim of developing a nondestructive biomarker (serum 'B' esterases) for monitoring bird populations exposed to azamethiphos S((6-chloro-2-oxooxazolo(4,5-b)pyridin-3(2 H)-yl)methyl) 0,0-dimethyl phosphorothioate (9Cl), parallel laboratory and field studies were performed. In japanese quail (Coturnix coturnix japonica) treated with azamethiphos at 10 mg kg-1, serum butyrylcholinesterase (BChE) and carboxylesterase (CE) activities were inhibited by 88% and 35%, respectively, after 24 h. A gradual recovery was observed after 48 and 72 h. With a higher dose (50 mg kg-1), the birds died, or were killed 3 h after dosing. Serum BChE and brain acetylcholinesterase (AChE), in birds that were sampled at 3 h, were inhibited by 98% and 92%, respectively. Hepatic microsomal and serum CEs were also inhibited. There was a statistically significant correlation (r=0.9808, p<0.001) between the activities of serum BChE and brain AChE. Swallows (Hirundo rustica) nesting in a stable treated with azamethiphos showed a drastic reduction in BChE (56%) and CE (36%) 24 h after treatment of the stable. © 1994 Chapman & Hall
Decoration of Dihydropyrimidine and Dihydropyridine Scaffolds with Sugars via Biginelli and Hantzsch Multicomponent Reactions: An Efficient Entry to a Collection of Artificial Nucleosides
No full textHere we present an overview of our work on the glycosylation of biologically relevant heterocycles. An array of stereochemically pure C-glycosylated dihydropyrimidine and dihydropyridine derivatives (artificial nucleosides) has been prepared. Our strategy involved the synthesis of suitably designed C-glycosylated reagents and their use as components in Biginelli and Hantzsch cyclocondensations. Molecular diversity has been explored within the collection on the basis of the nature and the number of sugar residues as well as their positions in the heterocyclic rings
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
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