Search results for "Rossi"

A theoretical study on the thermal ring opening rearrangement of 1H-bicyclo[3.1.0]hexa-3,5-dien-2-one: a case of two state reactivity

2009

The molecular mechanism of the thermal rearrangement of singlet 1H-bicyclo[3.1.0]hexa-3,5-dien-2-one to give triplet 4-oxocyclohexa-2,5-dienylidene has been investigated using density functional theory (B3LYP and M05-2X functionals) as well as ab initio CASSCF and CASPT2 multiconfigurational methods. The reactant has a singlet ground state while the product can be found in three low lying electronic states P((3)B(1)), P((1)B(1)), and P((1)A'). Therefore, the molecular mechanism of this ring opening rearrangement may involve up to three different potential energy surfaces of two spin multiplicities: two singlet (closed shell, CS, and open shell, OS) and one triplet. The stationary points on …

An agency-promoting learning arena for developing shared work practices

2017

Despite the emerging recognition of the pivotal role played by professional agency within work contexts, little is known about how agency is promoted and enacted in organised work-related learning settings. This chapter focuses on the work conference as an orchestrated agency-promoting learning arena. We understand professional agency as a necessary precondition of work-related learning, and we emphasise the potential of work conferences to activate and promote such agency. Our empirical study investigated three work conferences in education and healthcare organisations in Finland. Utilising assessments, the investigation addressed how the participants perceived the conditions for learning …

GENOTYPIC AND PHENOTYPIC DIVERSITY OF LACTOBACILLUS ROSSIAE STRAINS ISOLATED FROM SOURDOUGH

2007

Lavoro a termine e contrattazione collettiva

2014

Nel ripercorrere l’evoluzione della disciplina del lavoro a tempo determinato, considerato come emblema della flessibilità e, al contempo, quale strumento per favorire l’incremento dell’occupazione, l’A. analizza in particolare il ruolo svolto dalla contrattazione collettiva, che talvolta è destinataria di un ampio rinvio legale, talaltra si ritrova ad operare entro ristretti limiti. Analysing the evolution and the regulation of fixed-term contract, considered as a symbol of flexibility and, at the same time, as a means to increase employment, the Author particularly examines the role played by collective bargaining, that sometimes is connected to a large legal referral, sometimes has to op…

Harvesting Fluorescence from Efficient Tk -> Sj (j, k > 1) Reverse Intersystem Crossing for ??* Emissive Transition-Metal Complexes

2013

Using a bimetallic Au(I) complex bearing alkynyl-(phenylene)3-diphosphine ligand (A-3), we demonstrate that the fluorescence can be exquisitely harvested upon T1 → Tk (k > 1) excitation followed by Tk → Sj (j, k > 1) intersystem crossing (ISC) back to the S1 state. Upon S0 → S1 355 nm excitation, the S1 → T1 intersystem crossing rate has been determined to be 8.9 × 108 s–1. Subsequently, in a two-step laser pump–probe experiment, following a 355 nm laser excitation, the 532 nm T1 → Tk probing gives the prominent blue 375 nm fluorescence, and this time-dependent pump–probe signal correlates well with the lifetime of the T1 state. Careful examination reveals the efficiency of Tk → Sj (j, k > …

Climatic and anthropogenic influences on three burgundian watercourses : geoarchaelogy of crossing sites on Loire, Saône and Doubs during the Holocene

2015

A geoarchaeological study was led on four sections of the valleys of the Loire, Saône and Doubs rivers (Burgundy, France) in order to point out the factors influencing the alluvial dynamics on a multimillennial scale, and their effects on the preservation of archaeological information. Investigations started by roman and medieval remains of bridges discovered in active channels, were then carried out on larger parts of alluvial plains, and altogether allowed the evolutions of the channels during the Holocene period to be deducted. Various types of information on alluvial characteristics were crossed through time and space: ancient maps and XXth century or aerial photographs for centennial s…

Three-gluon Green functions: low-momentum instanton dominance and zero-crossing

2016

International audience; We will report on a some efforts recently made in order to gain a better understanding of some IR properties of the 3-point gluon Green function by following both lattice and continuum QCD approaches.

Maturazione sur lies di un vino Nero d’Avola della Sicilia occidentale

2009

Meiosis in translocation heterozygotes in the mosquito Culex pipiens.

1971

Adult Culex pipiens males irradiated with both X-rays and neutrons were crossed to untreated females and F1-egg rafts were checked for dominant lethality. F1-progenies were outcrossed with normal individuals in order to obtain lines with inherited semisterility. From a total of 120 lines that showed a certain amount of sterility 12 lines were studied cytologically. 10 lines showed reciprocal chromosome exchanges.—At late pachytene and diplotene cross configurations with large asynaptic regions at the center of the cross are obligatory. Bivalents, chains of three, chains of four, and ring configurations are present at metaphase and anaphase I. The different frequencies of the occurrence of s…

Observational study on risk factors determining residual dizziness after successful benign paroxysmal positional vertigo treatment: The role of subcl…

2018

Studio osservazionale sui fattori di rischio che causano residual dizziness dopo il trattamento della vertigine parossistica posizionale benigna: il ruolo della VPPB subclinica.Alcuni pazienti, dopo il trattamento della vertigine parossistica posizionale benigna concluso con successo, possono lamentare un disequilibrio residuo. La possibile spiegazione potrebbe essere: la persistenza di otoliti canalari insufficienti a provocare un nistagmo clinicamente evidente, una disfunzione utriculare, coesistenza di altri disordini del sistema vestibolare. Abbiamo condotto uno studio osservazionale prospettico caso-controllo, focalizzando l’attenzione sul ruolo di fattori di rischio che possono causar…