Search results for "shell"

Baseline assessment of heavy metals content and trophic position of the invasive blue swimming crab Portunus segnis (Forskål, 1775) in the Gulf of Ga…

2018

This study provides a baseline assessment of cadmium, copper, iron, manganese, lead, and zinc concentrations in muscles, gills, and exoskeleton of the Lessepsian blue swimming crab Portunus segnis captured in the Gulf of Gabès (Southern Mediterranean Sea, Tunisia) in November 2015. Furthermore, the species’ trophic position is estimated using CN stable isotope analysis. The exoskeleton showed the lowest metal contents; in soft tissues, the essential Cu, Fe, and Zn and the non-essential Cd, Mn, and Pb showed the highest and lowest concentrations, respectively. The crab was characterized by a trophic position of 3.32, confirming its carnivorous trophic habits. Compared with literature data on…

Growth and reproductive simulation of candidate shellfish species at fish cages in the Southern Mediterranean: Dynamic Energy Budget (DEB) modelling …

2012

Abstract A Dynamic Energy Budget (DEB) model is used to simulate growth and reproduction of the shellfish Mytilus galloprovincialis and Crassostrea gigas in an integrated multi-trophic aquaculture (IMTA) farm scenario situated in the Southern Mediterranean (the Gulf of Castellammare, Sicily). We modelled the effect of primary production enrichment at fish cages on shellfish growth and life history traits using 4 years-hourly temperature data (01 January 2006–31 December 2009) at a depth of 1 m. Outputs of the DEB simulations were: the maximum theoretical total shell length of shellfish, the potential reproductive outputs and the mean annual von Bertalanffy growth rate. There was a mean incr…

Growth of Mytilus galloprovincialis (mollusca, bivalvia) close to fish farms: a case of integrated multi-trophic aquaculture within the Tyrrhenian Sea

2009

A current practice of marine aquaculture is to integrate fish with low-trophic-level organisms (e.g. molluscs and/or algae) during farming to minimise effects of cultivation on the surrounding environment and to potentially increase economic income. This hypothesis has been tested in the present article experimentally, by co-cultivating fish and mussels (Mytilus galloprovincialis) in the field. Integrated multi-trophic aquaculture (IMTA) experiments were started in July 2004 by transplanting mussel seed at two depths (-3 and -9 m) within 1,000 m downstream to fish cages and at 1,000 m upstream from cages. Mussels were cultured in nylon net bags for 12 months and the growth recorded biometri…

Morphometric analysis of the shells of the Genus Bolivina from the Gulf of Gela (Sicilian Channel, Italy): a valid classification instrument?

2010

Parametric Experiments in Architecture : a Connection Joint Design for Sustainable Structures in Bamboo

2023

This book offers a comprehensive overview of the use of bamboo in the building industry. It systematically demonstrates bamboo’s utility in terms of its properties, describing the material properties of typical industrial bamboo products, and discussing their performance evaluation and optimization as building components and in the creation of building envelopes. The book presents the recent developments regarding the innovative ways to design and represent architecture through parametric survey tools, and describes the experimental geometrical-generative design process of a connection joint for free-form lightweight structures employing beams made of bamboo culms. It examines algorithmic-g…

Development of New Bio-based Materials Derived from Sicilian Agri-Food Industry Waste

2023

La necessità di soluzioni di materiali da costruzione a base biologica e sostenibili è aumentata drammaticamente nell’ultimo ventennio. Questa ricerca esplora i possibili modi per riutilizzare materiale di scarto a base biologica (come i gusci della frutta secca), derivati dall'industria agroalimentare, per la produzione di nuovi materiali da costruzione sani in linea con i principi dell'economia circolare. L’analisi di alcuni casi di studio precedenti e le attuali ricerche dimostrato la possibilità di riutilizzare i gusci della frutta secca per la realizzazione di nuovi componenti edilizi. Le attuali tendenze mostrano che le resine sintetiche sono sempre più usati come legante per incollar…

The Use of Waste Hazelnut Shells as a Reinforcement in the Development of Green Biocomposites.

2022

Biodegradable Mater-Bi (MB) composites reinforced with hazelnut shell (HS) powder were prepared in a co-rotating twin-screw extruder followed by compression molding and injection molding. The effects of reinforcement on the morphology, static and dynamic mechanical properties, and thermal and rheological properties of MB/HS biocomposites were studied. Rheological tests showed that the incorporation of HS significantly increased the viscosity of composites with non-Newtonian behavior at low frequencies. On the other hand, a scanning electron microscope (SEM) examination revealed poor interfacial adhesion between the matrix and the filler. The thermal property results indicated that HS could …

Electrodeposition and ILGAR process to obtain Ni-In2S3 core-shell nanowires

2013

Revising Ovid’s Metamorphoses: Dramatizing the Mythical in Mary Shelley’s Proserpine

2017

This contribution intends to assess the web of intertextual references in Mary Shelley’s drama Proserpine (1820), an early example of Romantic interest in revisionist mythology. The few critical efforts on the text focus on its transposition of the Ovidian narrative and its proto-feminist instances of mythical revisionism. Shelley’s adaptation primarily concerns characterization, structure and intended audience. In light of Ostriker’s (1984) suggestion that revisionist myth-making in women’s literary production constitutes a significant reshaping of shared culture and personal identity, Proserpine generally reads as a tale of defiance against patriarchal violence. The thoroughness of the ex…

Uova di struzzo dipinte da Mozia

2005

Analisi e studio di alcuni frammenti di uova di struzzo conservate al Museo di Motya Analysis and study of some fragments of ostrich eggs-shell preserved at the Motya Museum