Search results for "ALCA"

Soft-sediment deformation structures (SSDS) in Pleistocene calcarenites of Favignana island (Sicily, Italy)

2013

Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach

2019

Calcareous biominerals typically feature a hybrid nanogranular structure consisting of calcium carbonate nanograins coated with organic matrices. This nanogranular organisation has a beneficial effect on the functionality of these bioceramics. In this feasibility study, we successfully employed a flow-chemistry approach to precipitate Mg-doped amorphous calcium carbonate particles functionalized by negatively charged polyelectrolytes&mdash

Marrëdhëniet e Patriarkanës së Ohrit me Sicilinë dhe komunitetet arbëreshe (shek. XVI-XVIII)

2018

Indagine storiografica sui rapporti tra il Patriarcato di Ocrida e la Sicilia. Presenze di ecclesiastici ortodossi nelle comunità albanesi di Sicilia (sec. XVI-XVIII)

Argenti messinesi ad Alcara Li Fusi

2013

L’autore studia un importante novero di suppellettili liturgiche di manifattura messinese presenti ad Alcara Li Fusi, comune della provincia di Messina. Questi manufatti, molti dei quali inediti, fanno parte della collezione del museo di Arte Sacra del piccolo centro dei Nebrodi. L’articolo è un ulteriore contributo per tracciare un quadro storico-artistico il più esaustivo possibile sulla, non ancora ben conosciuta, maestranza della città dello Stretto.

Comparison of endoscopic and open resection for Haglund tuberosity in a cadaver study.

2006

Background: About half of patients who have Haglund disease may require treatment by surgical resection of the superior portion of the calcaneal tuberosity. Endoscopic techniques have been described as alternatives to open surgery, but only results of uncontrolled retrospective clinical investigations have been reported. Up to now no research is available which compares these different procedures. Methods: A controlled laboratory study was done to evaluate the morphologic appearance of the superior portion of the calcaneal tuberosity after endoscopic or open resection. The tuberosity was resected in 15 isolated fresh-frozen human cadaver lower limb specimens with either open (nine) or endos…

Favignana bio-calcarenite: technological culture, knowledge and recovery

2022

Favignana Island, the biggest one among Egadi islands, is well known for its deposits of calcarenite, which has been extracted and used since ancient times. The landscape of the Island is shaped by the widespread presence of quarries that mark the seaside as well. Furthermore, the constant presence of dry-stone walls, made of calcarenite, and of the characteristic architecture of buildings, represents a hallmark for the rest of Egadi islands as well, making it clear how important the presence of this material has been for the architectural and technological culture of these places.Calcarenite itself, exported by this island, is still a constituent material of many buildings in the western p…

Effect of the applied organic load rate on biodegradable polymer production by mixed microbial cultures in a Sequencing Batch Reactor

2006

This article studies the operation of a new process for the production of biopolymers (polyhydroxyalkanoates, PHAs) at different applied organic load rates (OLRs). The process is based on the aerobic enrichment of activated sludge to obtain mixed cultures able to store PHAs at high rates and yields. A mixture of acetic, lactic, and propionic acids at different concentrations (in the range 8.5-31.25 gCOD/L) was fed every 2 h in a sequencing batch reactor (SBR). The resulting applied OLR was in the range 8.5-31.25 gCOD/L/day. Even though, as expected, the increase in the OLR caused an increase in biomass concentration (up to about 8.7 g COD/L), it also caused a relevant decrease of maximal po…

Thermal and hygrometric properties of traditional calcarenite stones in the area of Palermo

2017

Il contributo espone le misure di conducibilità termica svolte su tre conci di calcarenite conchiliare e la caratterizzazione igrometrica di uno di essi. I risultati sono confrontati con i dati termici e igrometrici riportati dalle norme tecniche esistenti (UNI 10351, UNI EN ISO 10456, UNI EN 1745). The energy improvement of historic buildings requires detailed knowledge of the thermal and hygrometric properties of traditional materials and components. These data should be collected for specific local contexts, where the features of historic constructions are comparable. For the purpose of developing this tool for the architectural heritage of Palermo, this research focuses on calcarenite s…

Influence of organic amendments on diuron leaching through an acidic and a calcareous vineyard soil using undisturbed lysimeters.

2008

9 pages; International audience; The influence of different organic amendments on diuron leaching was studied through undisturbed vineyard soil columns. Two composts (A and D), the second at two stages of maturity, and two soils (VR and Bj) were sampled. After 1 year, the amount of residues (diuron þ metabolites) in the leachates of the VR soil (0.19e0.71%) was lower than in the Bj soil (4.27e8.23%), which could be explained by stronger diuron adsorption on VR. An increase in the amount of diuron leached through the amended soil columns, compared to the blank, was observed for the Bj soil only. This result may be explained by the formation of mobile complexes between diuron and water-extrac…

Bone mineral density and physical activity in 50–60-year-old women

1991

Abstract The bone mineral density (BMD) of the calcaneus was measured utilizing a single energy photon absorption method in 108 women, aged 50–60 years. The women who participated in vigorous exercise two or more times a week or whose total physical activity amounted to 4 h a week had significantly higher BMD values than those who exercised less than two times a week or did less than 4 h physical activity a week. The physically active women also showed higher values for leg extension force and maximal oxygen uptake. BMD and leg extension force were positively correlated, whereas correlations between BMD and body mass, and the width of the calcaneus were negative. When other life-style varia…