Search results for "Atrina"

The duplivincular ligament of recent Pinna Nobilis L., 1758: further evidence for pterineid ancestry of the Pinnoidea

2008

A correct interpretation of ligament ontogeny and structure is essential for establishing phylogenetic relationships among higher taxa in the bivalve superorder Pteriomorphia. Recent research on pteriomorphian ligaments has focused on understanding ligament morphospace (Thomas et al., 2000; Ubukata, 2003) and evolutionary pathways. In this regard, studies of the transition from larval to post-larval and adult ligaments (Malchus, 2004) have been especially fruitful. Members of the pteriomorphian superfamily Pinnoidea live with their tapered anterior end buried to varying degrees in sediment. The fan shell Pinna may be buried up to one third of its length (Templado, 2004) (Fig. 1), and Atrina…

How Critical Infrastructure Orients International Relief in Cascading Disasters

2016

Critical infrastructure and facilities are central assets in modern societies, but their impact on international disaster relief remains mostly associated with logistics challenges. The emerging literature on cascading disasters suggests the need to integrate the nonlinearity of events in the analyses. This article investigates three case studies: the 2002 floods in the Czech Republic, Hurricane Katrina in 2005 and the 2011 Tohoku earthquake, tsunami and Fukushima meltdown in Japan. We explore how the failure of critical infrastructure can orient international disaster relief by shifting its priorities during the response. We argue that critical infrastructure can influence aid request and …

Biblical Echoes and Communal Home in Jesmyn Ward's Salvage the Bones

2020

Jesmyn Ward’s second novel, Salvage the Bones (2011), offers a literary account of an African American family in dire poverty struggling to weather the horrors of Hurricane Katrina on the outskirts of Bois Sauvage, Mississippi. This article focuses on the novel’s ‘ideology of form’, which is premised on biblical models of narration —grounded on a literary transposition of The Book of Deuteronomy— that serves to portray the victimization of African Americans in mythical tones to evoke the country’s failed covenant between God and his chosen people. It also brings into focus the affective bonds of unity and communal healing relying on the idiosyncratic tenet of home understood as national spa…

Open-shell doublet character in a hexaazatrinaphthylene trianion complex

2015

Three-electron reduction of hexaazatrinaphthylene (HAN) with a magnesium(I) reagent leads to [(HAN){Mg(nacnac)}3] (1), containing a [HAN]3– ligand with a spin of S = ½. Ab initio calculations reveal that the [HAN]3– ligand in 1 has a groundstate wave function with multiconfigurational properties, and can be described as a triradicaloid species with a small amount of open-shell doublet character. peerReviewed

Alma Mater: 2015/Pavasaris

2015

Strong Exchange Coupling in a Trimetallic Radical-Bridged Cobalt(II)-Hexaazatrinaphthylene Complex.

2016

Reducing hexaazatrinaphthylene (HAN) with potassium in the presence of 18-c-6 produces [{K(18-c-6)}HAN], which contains the S=1/2 radical [HAN](.-) . The [HAN](.-) radical can be transferred to the cobalt(II) amide [Co{N(SiMe3 )2 }2 ], forming [K(18-c-6)][(HAN){Co(N'')2 }3 ]; magnetic measurements on this compound reveal an S=4 spin system with strong cobalt-ligand antiferromagnetic exchange and J≈-290 cm(-1) (-2 J formalism). In contrast, the Co(II) centres in the unreduced analogue [(HAN){Co(N'')2 }3 ] are weakly coupled (J≈-4.4 cm(-1) ). The finding that [HAN](.-) can be synthesized as a stable salt and transferred to cobalt introduces potential new routes to magnetic materials based on …

Strong Exchange Coupling in a Trimetallic Radical-Bridged Cobalt(II)-Hexaazatrinaphthylene Complex

2016

: Reducing hexaazatrinaphthylene (HAN) with potassium in the presence of 18-c-6 produces [{K(18-c-6)}HAN], which contains the S = 1/2 radical [HAN]C ¢ . The [HAN]C ¢ radical can be transferred to the cobalt(II) amide [Co{N- (SiMe3 )2 }2 ], forming [K(18-c-6)][(HAN){Co(N’’)2 }3 ]; magnetic measurements on this compound reveal an S = 4 spin system with strong cobalt–ligand antiferromagnetic exchange and J ¢290 cm¢1 (¢2 J formalism). In contrast, the CoII centres in the unreduced analogue [(HAN){Co(N’’)2}3] are weakly coupled (J ¢4.4 cm¢1 ). The finding that [HAN]C ¢ can be synthesized as a stable salt and transferred to cobalt introduces potential new routes to magnetic materials based on str…

Post-Katrina New Orleans. Dalla ricostruzione alla resilienza

2016

Attraverso lo studio di un’esperienza emblematica come quella di New Orleans e della sua pianificazione post-Katrina, ci si propone di avviare una riflessione sulle opportunità generate dalla crisi ambientale, nello specifico scaturite da un evento estremo e distruttivo (tanto da far identificare una città “pre-” e una città “post-”); opportunità rese visibili e derivanti dall’applicazione di un approccio basato sulla resilienza. Tale approccio non ha caratterizzato la pianificazione post-Katrina fin dall’inizio, ma, al contrario, è possibile osservare un’evoluzione degli strumenti adottati, che, in un decennio, ha visto la graduale, ma esplicita, integrazione della resilienza nella pianifi…

Putative sorting signals involved in PIN1 trafficking

2013

Las auxinas son hormonas vegetales involucradas en muchos procesos fisiológicos, tales como el crecimiento y diferenciación celular, la maduración de los frutos, la floración o los tropismos. Su transporte a través de la planta es polar, jugando un papel esencial en la regulación del crecimiento y el desarrollo y contribuyendo al mantenimiento de la polaridad global de la planta. La polaridad en el flujo de auxinas es debida, al menos en parte, a la distribución polar de los transportadores de salida de auxina de la familia PIN. En Arabidopsis thaliana se han identificado 8 transportadores PIN diferentes. Todos ellos presentan una estructura similar, con un dominio citosólico central que se…