Search results for " CRA"

Characterization of a proteinaceous extracellular coat synthesized by the ?slime? variant of Neurospora crassa

1989

Cells of the “slime” strain of Neurospora crassa synthesize a coherent extracellular material which remains attached to the cell surface, but is released into the liquid medium by shaking. The material was purified and studied by different criteria. By electron microscopy it appears as long wavy sheets which strongly bind concanavalin A, but not wheat germ agglutinin, and maintain their integrity in the absence of structural polysaccharides. Analysis of the purified material revealed that it was free of contaminating membranes; it contained more than 70% protein, 1% neutral sugars (glucose, mannose, fucose and galactose), less than 2% lipids and ca. 4% not-characterized hexosaminelike compo…

Separation of chitosomal chitin synthetase from cell-free extracts ofNeurospora crassa “Slime” variant agglutinated with concanavalin A

1989

Cell-free extracts of the wall-less slime variant ofNeurospora crassa were treated with concanavalin A (Con A); this treatment caused a massive agglutination of the particulate structures in the cell-free homogenate, although most (73%) of the chitin synthetase initially present in the cell-free extract remained in the supernatant obtained after sedimentation of the lectin-flocculated material. This chitin synthetase showed the sedimentation properties of chitosomes (unique microvesicular structures) and failed to bind [3H]Con A. A significant percentage (42%) of the chitin synthetase activity associated with the Con A-flocculated material probably corresponds to mechanically trapped chitos…

Postbuckling analysis of cracked stiffned plates by pb–2 Rayleigh-Ritz method

2015

A Rayleigh-Ritz approach for the analysis of buckling and post-buckling behavior of cracked composite stiffened plates is presented. The structure is thought as the assembly of plate elements modeled by the first order shear deformation theory. Continuity along the edges common to contiguous elements are enforced by using penalty techniques, which also allow to straightforwardly implement efficient crack modeling strategies. General symmetric and unsymmetric stacking sequences are considered and numerical procedures have been developed and used to validate the present solution by comparison with FEA results. Original results are also presented for post-buckling solution of multilayered stif…

Construction Guilds in Southern Italy and the Islands (15th-16th Centuries): Leadership and Rivalries

2020

In the South of Italy and the big islands, in counter-trend with respect to the rest of the peninsula, construction guilds know a renewed vitality between the last decades of 15th and the beginning of 16th centuries. Rules, prerogatives and operative modes are regulated by statutes, often undersigned by the masters included in the trade organization, mentioning also the other actors involved in the approval processes. The intertwining of these and other archival documents sometimes reveals the leading role played within the guild by masters that overcome the anonymity usually considered to be inherent in the corporate system. Comparing the rules and the boundaries among specific trades esta…

Análisis de las alteraciones oclusales y morfología craneofacial del paciente fisurado

2015

Se realizó un estudio observaciones retrospectivo de 212 pacientes con fisura oral cuyo tratamiento ortodóncico se inició entre 2004 y 2011 en el Hospital Materno Infantil de Sant Joan de Déu de Barcelona. La muestra se dividió según el tipo de fisura en: fisura labial, fisura palatina, fisura labiopalatina unilateral y fisura labiopalatina bilateral. Se plantean como objetivos fundamentales; describir la distribución por sexos, edad de nacimiento y lugar de nacimiento, describir el tipo de fisura presente en la muestra, analizar la oclusión en el plano transversal, cuantificar las alateraciones en el número de dientes, valorar el índice pronóstico de Goslon según el tipo de fisura y por úl…

On the (In)Security of 1090ES and UAT978 Mobile Cockpit Information Systems : An Attacker Perspective on the Availability of ADS-B Safety- and Missio…

2022

Automatic dependent surveillance-broadcast (ADS-B) is a key air surveillance technology and a critical component of next-generation air transportation systems. It significantly simplifies aircraft surveillance technology and improves airborne traffic situational awareness. Many types of mobile cockpit information systems (MCISs) are based on ADS-B technology. MCIS gives pilots the flight and traffic-related information they need. MCIS has two parts: an ADS-B transceiver and an electronic flight bag (EFB) application. The ADS-B transceivers transmit and receive the ADS-B radio signals while the EFB applications hosted on mobile phones display the data. Because they are cheap, lightweight, an…

IMPRESSIONI IN SICILIA

2014

“Impressioni in Sicilia” è la storia di una piccola azienda di design tessile che ha operato a Palermo dal 1974 fino al 1994. Proprietaria dell’impresa è Regine Hildebrandt, una svizzera trapiantata in Sicilia. La nascita di questo laboratorio s’inserisce in quel filone di esperienze finalizzate a incentivare il processo che vede l’incontro tra la cultura del progetto e la produzione artigianale, spesso legata alle tradizioni e alle risorse di alcuni territori. Gli oggetti progettati e realizzati da Regine hanno un valore durevole per la qualità dei disegni e dei materiali ma soprattutto, perché il suo progetto di ricerca è destinato all’identificazione e alla proposizione di “tratti cultur…

Psicologia delle dipendenze sociali. Mondo interno e comunità

2008

The size and shape of shells used by hermit crabs: A multivariate analysis of Clibanarius erythropus

2009

Shell attributes such as weight and shape affect the reproduction, growth, predator avoidance and behaviour of several hermit crab species. Although the importance of these attributes has been extensively investigated, it is still difficult to assess the relative role of size and shape. Multivariate techniques allow concise and efficient quantitative analysis of these multidimensional properties, and this paper aims to understand their role in determining patterns of hermit crab shell use. To this end, a multivariate approach based on a combination of size-unconstrained (shape) PCA and RDA ordination was used to model the biometrics of southern Mediterranean Clibanarius erythropus populatio…

Accumulation of plerocercoids of Triaenophorus crassus in the second intermediate host Coregonus lavaretus and their effect on growth of the host

1999

Patterns of accumulation of Triaenophorus crassus in its second intermediate host whitefish Coregonus lavaretus s.l. were studied between 1991 and 1996 from two host populations in two separate areas of Lake Saimaa, Finland. Whitefish were infected commonly with several T. crassus plerocercoids and the parasites were aggregated into the oldest hosts. In one host population the annual parasite accumulation was 0·9 parasites in all host age groups between 3 and 8 years. In the other host population the annual accumulation was 1·6 parasites in 3–5-year-old fish, but increased up to 3 to 4 parasites per year in fish over 5 years old. The increase did not coincide with the period of maturation o…