Search results for "manna"
showing 10 items of 91 documents
La cultura inglese e l’interesse per il patrimonio architettonico e paesaggistico in Sicilia, tra scoperte, evoluzione degli studi e divulgazione
2019
e will trace the evolution of an encounter between two cultures, the English and the SiSicilian culture, which, at a time of political and social change, discover the classical world and the Arab-Norman architecture. The enchanted charm of Sicily and its imposing and melancholic nature was crossed for two centuries by the exodus of an English world that will share the eternal romanticism of it throughout Europe, and is also represented by the exploit of publications requested and produced by the Anglo-Saxon world between the eighteenth and nineteenth centuries. John Ruskin arrived in Sicily in 1874 to discover the nature and the architecture of the island. A comparison with the English trav…
Palermo e l'eredità Arabo-normanna
2015
La Palermo arabo-normanna mantiene viva la memoria di una città aperta, multietnica, riflesso e manifestazione di un sincretismo culturale che, nei secoli, l’ha resa unica e meritevole di essere custodita, valorizzata e riconosciuta come un autentico “gioiello”, patrimonio dell’umanità. Tra i monumenti arabo-normanni presenti, ne sono stati selezionati undici che preservano in modo pressoché integrale le componenti architettoniche e decorative e che si presentano in buono stato di conservazione. Si tratta infatti delle opere più rappresentative e artisticamente rilevanti nelle quali è possibile riconoscere inequivocabilmente i tratti salienti dell’arte arabo - normanna in tutte le sue mirab…
Le absidi nelle prime chiese normanne e nella Cappella Palatina di Palermo
2015
Nei primi decenni del XII secolo si realizzano in Sicilia numerosi edifici religiosi, le cui absidi seguono in genere i modelli bizantini, ma non mancano soluzioni originali. Tra le chiese basiliane del Val Demone si distingue quella dei Santi Pietro e Paolo a Casalvecchio Siculo (1117-1172), la cui abside centrale assume esternamente la forma di una torretta a pianta rettangolare, che include due nicchie pentagonali negli spazi di raccordo con la curva interna. Tutte e tre le absidi della chiesa di Sant’Andrea a Piazza Armerina (ante 1148) presentano esternamente un profilo rettilineo e la massiccia struttura muraria ingloba la torre campanaria. Nella cappella palatina di Palermo, consacra…
The influence of yeast glycosylated proteins on tannins aggregation in model solution
2004
<p style="text-align: justify;">The incidence of glycosylated yeast proteins on tannins aggregation in model solution was investigated using the spectrophotometric method (absorbance 700 nm). Glycosylated proteins released by two commercial <em>Saccharomyces cerevisiae</em> strains (RC212 and BM 45) during alcoholic fermentation in synthetic media, glycosylated proteins extracted by Peat’s method and industrial glycosylated proteins purified and separated by chromatography on Sepharose Concanavalin A were used to visualize effects on tannins aggregation. Results showed that tannins aggregation was limited by the glycosylated proteins according to their origin and their mod…
Viollet-le-Duc e la scoperta delle origini dell’architettura gotica
2017
Nella ricorrenza del secondo centenario della nascita, questo studio vuole mettere in evidenza alcuni aspetti ancora poco esplorati della formazione di Eugène Emmanuel Viollet-le-Duc, che hanno influenzato in modo fondamentale le sue ricerche. Ci si riferisce particolarmente all’interesse per la produzione artistica del Medioevo a cui lo studioso francese dedicherà le sue energie di ricercatore instancabile nel tentativo di trovare provenienze, derivazioni ed evoluzione dell’architettura gotica che rappresenterà anche lo stile ideale a cui riferirsi per collocarsi all’avanguardia della produzione architettonica del proprio tempo. Le naturali inclinazioni, la formazione liceale e la speciali…
Identification of glucan-mannoprotein complexes in the cell wall of Candida albicans using a monoclonal antibody that reacts with a (1,6)- -glucan ep…
1995
The use of a novel monoclonal antibody (mAb) that reacts with (1,6)-beta-glucan has permitted the study of the different covalent linkages between glucan and mannoproteins in the cell wall of Candida albicans. The mAb JRR1 was originally raised by immunization with Zymolyase extracts from C. albicans cell walls, but it soon became apparent that it reacted with a (1,6)-beta-glucan epitope. By using this antibody, we show the existence of glucan-mannoprotein complexes between the (1,6)-beta-glucan epitope recognized by the antibody and cell wall mannoproteins. The topology of the (1,6)-beta-glucan in the cell wall of C. albicans has also been studied.
Evolution and Immune Function of Fish Lectins
2016
Abstract Lectins are sugar-binding proteins widely distributed among animals, plants, and microbial taxon, involved in diverse biological processes. In both invertebrates and vertebrates, they play key roles in nonself recognition and immune responses, such as nonself recognition, inflammatory processes, and immunomodulation. In fish, many lectin families have been identified, and their tissue-specific expression and localization of the various lectin repertoires and their ligands are consistent with their distinct biological roles in innate and adaptive immunity. Here, we discuss the involvement of F-type lectins, rhamnose-binding lectins, galectins, and C-type lectins in pathogen recognit…
Characterization of aSchizosaccharomyces pombemorphological mutant altered in the galactomannan content
1991
In a search for Schizosaccharomyces pombe mutants resistant to the antifungal agent papulacandin B, a morphological mutant was isolated. The mutant is round shaped in contrast to the rod shaped parental strain. This morphological defect segregated as a recessive Mendelian character and was not observed in other papulacandin B resistant mutants belonging to the same complementation group. The mutation mapped in the right arm of S. pombe chromosome III very close to pap1 marker. Mutant cell walls were more susceptible to alkali extraction and Novozyme degradation than those from the wild-type. A specific reduction in the cell wall galactomannan fraction was the only significant difference det…
Wall mannoproteins of the yeast and mycelial cells of Candida albicans: nature of the glycosidic bonds and polydispersity of their mannan moieties.
1988
SUMMARY: Zymolyase released between 20 and 25% of the total protein from purified walls of yeast (Y) and mycelial (M) cells of Candida albicans. The material released contained 92% carbohydrate (86% mannose and 6% glucose) and 7:< protein. Over 85% of the carbohydrate was N-glycosidically linked to the protein and the rest (less than 15%) was linked O-glycosidically. Highly polydisperse, high molecular mass mannoproteins, resolved by electrophoresis as four defined bands in Y cells and two bands in M cells, had both types of sugar chains. A 34 kDa species found in both types of cells had a single 2.5 kDa N-glycosidically linked sugar chain and a 3 1.5 kDa protein moiety. Polydispersity in t…
Killer Toxins of Yeasts: Inhibitors of Fermentation and Their Adsorption.
2019
The killer toxin (KT 28), a glycoprotein of Saccharomyces cerevisiae strain 28, was almost completely adsorbed by bentonite, when applied at a concentration of 1 g per liter. No significant differences were found between several types of bentonite. Killer toxin KT 28 is similarly adsorbed by intact yeast cells or by a commercial preparation of yeast cell walls that has been recommended to prevent stuck fermentations. An investigation of the cell wall fractions revealed that the toxin KT 28 was mainly adsorbed by mannan, that removed the toxin completely. The alkali-soluble and the alkali-insoluble β-1,3- and β-1,6-D-glucans lowered the toxin concentration to one tenth of the original amount…