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Extraboard performance : Tri Met case study. This paper examines extraboard operations and management at Tri Met, the transit provider for the Portland Oregon metropolitan area. The : extraboard consists of a pool of operators who fill open work resulting from absences and other causes. The pape Transgenic mouse with a stably integrated reporter gene s can be a valuable resource for obtaining uniformly labeled stem cells, tissues, and organs for various applications.

This " Tri -Modality Reporter Mouse" system allows one to isolate most cells from this donor mouse and image them for bioluminescent fluc2 , fluorescent Formation and proof of stable bi-, tri - and tetraradical polyanions during the electrochemical reduction of cone-polynitrocalix[4]arenes. Graphical abstract: - Abstract: The first intermediates of electrochemical reduction of nitro compounds in nonaqueous DMF are stable radical anions.


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In the series of mono-, di -, tri - and tetranitro calix[4]arenes each nitro group represents a reduction center, therefore the question about the spin state of intermediary anions arises. In this communication, the voltammetric and coulometric investigation of these compounds is performed together with the spectral measurements ESR and UV-vis. The in-situ spectroelectrochemical approach proved that during reduction, in all polynitro radicalic intermediates the electrons remain unpaired and thus relatively stable mono-, di -, tri - and tetraradical mono-, di -, tri - and tetraanions, respectively, can be electrochemically generated in aprotic DMF from polynitrocalix[4]arenes.

This finding confirms that the nitrophenyl units in polynitrocalix[4]arenes are completely independent and no mutual electronic communication takes place among them. Design e valutazione di una esperienza di mobile learning. Full Text Available Analisi dello sviluppo scientifico e tecnologico nel campo di mobile learning, con particolare riferimento ai problemi di progettazione e valutazione nelle esperienze.

Vengono analizzate le caratteristiche di metodologia didattica innovativa insieme a delle proposte per strumenti operativi concreti che consentano di progettare interventi didattici di mobile learning. Esercizi scelti di algebra. Gli argomenti di questo primo volume sono: principio d'induzione, combinatoria, congruenze, gruppi abeliani, anelli commutativi, polinomi, estensioni di campi, campi finiti. Una serie di esercizi preliminari introduce le tecniche principali da usare per confrontarsi con i testi d'esame proposti. Autobiografia di un fisico. Introduzione alle teorie di gauge.

Anche se collegato ai volumi precedenti, il libro si presta ad una lettura indipendente, che presume solo conoscenze generali di relativita speciale, della seconda quantizzazione e della fenomenologia delle interazioni elettrodeboli. L'esposizione segue un percorso pedagogico, che parte dal caso semplice dell'ampiezza di transizione in meccanica quantistic Electron spin resonance signal from a tetra -interstitial defect in silicon.

The Si-B3 electron spin resonance ESR signal from agglomerates of self-interstitials was detected for the first time in hydrogen-doped float-zone-grown silicon samples subjected to annealing after electron irradiation. Previously this signal had been detected only in neutron- or proton-irradiated silicon samples.

The absence of obscuring ESR peaks for the investigated samples at applied measurement conditions allowed an investigation of the hyperfine structure of the Si-B3 spectra. The analysis supports assignment of a tetra -interstitial defect as the origin of the signal. Testov, D. Beta-decay properties are among the easiest and, therefore, the first ones to be measured to study new neutron-rich isotopes.


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Eventually, a very small number of nuclei could be sufficient to estimate their lifetime and neutron emission probability. With the new radioactive beam facilities which have been commissioned recently or will be constructed shortly new areas of neutron-rich isotopes will become reachable. Occorre riconoscere che tale atteggiamento era almeno in parte frutto di un preconcetto errato sul significato della statistica, ma che d'altra parte la natura dei lavori di tal genere che venivano alla luce sembrava a volte confermare la giustezza del preconcetto.

This study uses literature study to dig definition and field test to validate. FSB is defined as perceptions of individuals that is considered important adoption, utilization, and use of Accounting Information Systems. FSB is influenced by the important people around, individual thinking, and the level of spirituality. Programmazione del Network di 'Virologia Ambientale': Stato di avanzamento. Nell'intervento si presenta lo stato di avanzamento dei lavori riguardo la realizzazione dell'infrastruttura telematica del 'Network di Virologia Ambientale' promosso dal 'Dipartimento di Patologia Sperimentale, Biotecnologie Mediche, Infettivologia ed Epidemiologia' dell'Universit?

Dai bisogni di salute al consumo di risorse sanitarie in provincia di Bergamo: profilo degli indicatori di bisogno, domanda, offerta. Obiettivi : istituzione di un sistema di monitoraggio sanitario community-based; definizione di indicatori sanitari comparabili tramite un esame critico dei dati esistenti; sviluppo di metodologie per la raccolta e la validazione dei dati; supporto alla creazione di un sistema efficace e affidabile di trasferimento e scambio dei dati e degli indicatori stessi con uso spinto della tecnologia telematica; elaborazione di metodi e di strumenti necessari alla produzione di analisi e relazioni.

The present paper describes the application of automated cleanup and fractionation procedures of the Power Prep system Fluid Management Systems for the determination of polybrominated diphenyl ethers PBDEs in feeding stuffs and fish meal and oil. The method developed enabled the determination of 26 native PBDE congeners and 11 13 C 12 -labelled congeners, including deca-BDE , in a single-run analysis, using isotope dilution.

The automated cleanup, consisting of a succession of multilayer silica and basic alumina columns previously applied by Wyrzykowska et al.

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The method allowed an increase in productivity, i. The provisional detection limits, estimated in the samples, were pg for di -, tri -, tetra -, and penta-BDEs, pg for hexa-, hepta-, octa- and nona-BDEs, and pg for deca-BDE. Reduction of deca-BDE blank values is of concern to ongoing research.

Good accuracy was obtained by application of the whole procedure, representing an efficient, low-cost and fast alternative for routine analyses. Copyright Elsevier B. Structure deformations induced by pressure and temperature in synthetic Cs- tetra -ferri-annite 1M [Cs 1. Cs- tetra -ferri-annite is not a mineral name, but for the sake of brevity is used here to designate a synthetic analog of the mineral tetra -ferri-annite. High pressure P and high temperature T produce limited internal strain in the structure. Above C in air, Cs- tetra -ferri-annite underwent an oxidation of octahedral iron in the M2cis site, balanced by the loss of H and shown by a decrease of the unit-cell volume.

Independent isobaric data on thermal expansion and isothermal compressibility data define the geometric equation of state for Cs- tetra -ferri-annite. On the whole, the data confirm that the structure of Cs- tetra -ferri-annite may be a suitable candidate for the storage of large ions, such as Cs in the interlayer and should be considered as a potential Synroc component. Assembling of G-strands into novel tetra -molecular parallel G4-DNA nanostructures using avidin-biotin recognition. We describe a method for the preparation of novel long hundreds of nanometers , uniform, inter-molecular G4-DNA molecules composed of four parallel G-strands.

The only long continuous G4-DNA reported so far are intra-molecular structures made of a single G-strand. To enable a tetra -molecular assembly of the G-strands we developed a novel approach based on avidin-biotin biological recognition. The steps of the G4-DNA production include: i Enzymatic synthesis of long poly dG -poly dC molecules with biotinylated poly dG -strand; ii Formation of a complex between avidin-tetramer and four biotinylated poly dG -poly dC molecules; iii Separation of the poly dC strands from the poly dG -strands, which are connected to the avidin; iv Assembly of the four G-strands attached to the avidin into tetra -molecular G4-DNA.

The average contour length of the formed structures, as measured by AFM, is equal to that of the initial poly dG -poly dC molecules, suggesting a tetra -molecular mechanism of the G-strands assembly. The height of tetra -molecular G4-nanostructures is larger than that of mono-molecular G4-DNA molecules having similar contour length. The CD spectra of the tetra - and mono-molecular G4-DNA are markedly different, suggesting different structural organization of these two types of molecules.