Search results for "nimi"
showing 10 items of 596 documents
New Dinuclear Catalysts Rh2(N−O)2[(C6H4)P(C6H5)2]2 with Imidate Ligands: Synthesis and Isomerization from Head-to-Tail to Head-to-Head Configuration…
2001
Two new dirhodium(II) catalysts of general formula Rh(2)(N-O)(2)[(C(6)H(4))P(C(6)H(5))(2)](2) (N-O = C(4)H(4)NO(2)) are prepared, starting from Rh(2)(O(2)CCH(3))(2)(PC)(2)L(2) [PC = (C(6)H(4))P(C(6)H(5))(2) (head-to-tail arrangement); L = HO(2)CCH(3)]. The thermal reaction of Rh(2)(O(2)CCH(3))(2)(PC)(2).L(2) with the neutral succinimide stereoselectively gives one compound that according to the X-ray structure determination has the formula Rh(2)(C(4)H(4)NO(2))(2)[(C(6)H(4))P(C(6)H(5))(2)](2) (1). It corresponds to the polar isomer with two bridging imidate ligands in a head-to-head configuration. However, stepwise reaction of Rh(2)(O(2)CCH(3))(2)(PC)(2).L(2) with (CH(3))(3)SiCl and potassiu…
A spectral approach to a constrained optimization problem for the Helmholtz equation in unbounded domains
2014
We study some convergence issues for a recent approach to the problem of transparent boundary conditions for the Helmholtz equation in unbounded domains (Ciraolo et al. in J Comput Phys 246:78–95, 2013) where the index of refraction is not required to be constant at infinity. The approach is based on the minimization of an integral functional, which arises from an integral formulation of the radiation condition at infinity. In this paper, we implement a Fourier–Chebyshev collocation method to study some convergence properties of the numerical algorithm; in particular, we give numerical evidence of some convergence estimates available in the literature (Ciraolo in Helmholtz equation in unbou…
AMYR 2: A new version of a computer program for pair potential calculation of molecular associations
1998
AMYR is a computer program for the calculation of molecular associations using Fraga's pairwise atom-atom potential. The interaction energy is evaluated through a 1R expansion. The electrostatic energy is calculated through either the one-centre-per atom or the three-centres-per atom model by Hunter and Sanders. A pairwise dispersion energy term is included in the potential and corrected by a damping function. The program carries out energy minimizations through variable metric methods. The new version allows for the stationary point analysis of the intermolecular potential by means of the Hessian eigenvalues. Although using low-gradient thresholds optimization procedures to avoid many stat…
El papel de la Geografía en el análisis del contenido semántico de los topónimos. El caso de Alicante
2018
La relación entre Geografía y Toponimia es incuestionable, ya que los topónimos designan lugares de la superficie terrestre, y la Geografía es la ciencia que estudia los fenómenos que suceden sobre dichos lugares. Además, los nombres de lugar son una herramienta de primer orden para la reconstitución de un paisaje geográfico desaparecido. La Geografía, la Historia y la Lingüística son las tres principales disciplinas auxiliares de la ciencia toponímica. Se lleva a cabo un análisis toponímico de un caso paradigmático al respecto: Alacant/Alicante. Por un lado repasamos su larga y convulsa historia antigua, que implicó el abandono del poblado romano y su traslado -junto con su topónimo- al so…
On Extremal Cases of the Hopcroft's Algorithm
2010
In this paper we consider the problem of minimization of deterministic finite automata (DFA) with reference to Hopcroft’s algorithm. Hopcroft’s algorithm has several degrees of freedom, so there can exist different executions that can lead to different sequences of refinements of the set of the states up to the final partition. We find an infinite family of binary automata for which such a process is unique, whatever strategy is chosen. Some recent papers (cf. Berstel and Carton (2004) [3], Castiglione et al. (2008) [6] and Berstel et al. (2009) [1]) have been devoted to find families of automata for which Hopcroft’s algorithm has its worst execution time. They are unary automata associated…
Polyethylenimine is a strong inhibitor of human papillomavirus and cytomegalovirus infection.
2012
ABSTRACT Polyethylenimines are cationic polymers with potential as delivery vectors in gene therapy and with proven antimicrobial activity. However, the antiviral activity of polyethylenimines has not been addressed in detail thus far. We have studied the inhibitory effects of a linear 25-kDa polyethylenimine on infections with human papillomaviruses and human cytomegaloviruses. Preincubation of cells with polyethylenimine blocked primary attachment of both viruses to cells, resulting in a significant reduction of infection. In addition, the dissemination of human cytomegalovirus in culture cells was efficiently reduced by recurrent administration of polyethylenimine. Polyethylenimine conce…
Highly efficient transport of carboxyfluorescein diacetate succinimidyl ester into COS7 cells using human papillomavirus-like particles
2003
AbstractHuman papillomavirus virus-like particles (VLPs) have recently been used to deliver genes into mammalian cells in vitro and in vivo. Here, we investigated whether VLPs may serve as an efficient carrier of low molecular weight compounds (e.g. hormones, vitamins, peptides etc.) into cells. COS7 cells were incubated with recombinant HPV-16L1/L2 VLPs labelled with the fluorescence dye carboxyfluorescein diacetate succinimidyl ester. Using flow cytometry, we demonstrate that labelled VLPs can specifically bind to the cell surface followed by their complete internalisation. Our results indicate that VLPs are promising vehicles for highly efficient delivery of low molecular weight compound…
Synthesis of polymer nanogels by electro-Fenton process: investigation of the effect of main operation parameters
2017
Recently, electro-Fenton (EF) process has been shown as a promising, facile, effective, low cost and environmentally-friendly alternative for synthesizing polymer nanogels suitable as biocompatible nanocarriers for emerging biomedical applications. Here, the electrochemically-assisted modification of poly(vinylpyrrolidone) (PVP) by EF process was studied to assess the role of key operation parameters for a precise modulation of polymer crosslinking and its functionalization with [sbnd]COOH and succinimide groups. The dimensions of the nanogels, in terms of hydrodynamic radius (Rh) and weight-average molecular weight (Mw), can be tuned up by controlling the electrolysis time, current density…
Musiikkiterapeutti yksityisenä yrittäjänä ja Kelan lääkinnällisen kuntoutuksen palveluntuottajana
2015
Tässä pro gradu -tutkielmassa kuvataan Kelan vaikeavammaisten lääkinnällisen kuntoutuksen palveluntuottajana toimivien musiikkiterapeuttien toimintaa ja sijoittumista yhteiskunnan kuntoutuspalvelujärjestelmään vuosien 2012–2014 välisenä aikana. Lisäksi tutkielmassa tarkastellaan musiikkiterapeuttien kokemuksia kuntoutustyöstä ja yhteistyöstä Kelan ja muiden yhteistyötahojen kanssa. Tutkielma perustuu kyselytutkimukseen, joka toteutettiin syksyllä 2012 mrInterview -ohjelman avulla tehdyn internetkyselyn kautta. Kyselytutkimukseen osallistui 66 Kelan palveluntuottajahaun kautta tavoitettua musiikkiterapeuttia. Kerättyä kyselytutkimuksen aineistoa analysoitiin tilastollisin menetelmin SPPS Sta…
Nuorten identiteetti-ilmaisu IRC-Galleriassa : ilmaisukeinoina nimimerkit, profiilikuvat ja kuvatekstit
2010
NUORTEN IDENTITEETTI-ILMAISU IRC-GALLERIASSA Ilmaisukeinoina nimimerkit, profiilikuvat ja kuvatekstit Piia Pyykkönen Sosiologia Pro gradu-tutkielma Yhteiskuntatieteiden ja filosofian laitos Jyväskylän yliopisto Ohjaaja: Terhi-Anna Wilska Syksy 2010 Sivumäärä: 113 Pro gradu-tutkielmani käsittelee nuorten identiteetti-ilmaisua IRC-Galleriassa. Identiteettiilmaisun selvittämisessä ovat apuna nuorten profiilikuvat, niihin liittyvät tekstit sekä nuorten itselleen keksimät nimimerkit. Aineisto on kerätty internetin sosiaalisesta yhteisöpalvelusta IRC-Galleriasta. Aineisto koostuu neljässä eri yhteisössä olevien jäsenten profiilikuvista, niihin liittyvistä kuvateksteistä ja jäsenten nimimerkeistä.…