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101.
Francesco Sannicolò Simona Rizzo W?odzimierz Kutner Krzysztof Noworyta Valentina Bonometti Luigi Falciola Patrizia R. Mussini Marco Pierini 《Electrochimica acta》2010,55(27):8352-8364
Novel thiophene-based oligomer, 2,2′-bis(2,2′-bithiophene-5-yl)-3,3′-bithianaphthene (TX), was designed and synthesized, and its electrochemical and spectral properties characterised. TX was readily polymerised electrochemically to form well organized conducting homopolymer films on various solid electrode substrates. Moreover, it was successfully used for deposition by electropolymerisation of electrochemically active thin films of co-polymers with three different monomers of functionalised bis(2,2′-bithienyl)methane derivatives. It appeared that TX was an effective crosslinker and 3D promoter in these electropolymerisations involving co-monomers intrinsically showing limited aptitude for the electropolymerisation or forming polymer films of low conductivity. This attractive TX ability stems from combination of its (i) high conjugation efficiency in each of the two planar moieties, (ii) intrinsic 3D structure on account of the presence of the central node, and (iii) intrinsic regioselectivity in electropolymerisation on account of the positions of the two available free α-thiophene sites. 相似文献
102.
Martina Gensini Dr. Maria Altamura Dr. Tula Dimoulas Dr. Valentina Fedi Dr. Danilo Giannotti Dr. Sandro Giuliani Dr. Antonio Guidi Dr. Nicholas J. S. Harmat Dr. Stefania Meini Dr. Rossano Nannicini Franco Pasqui Manuela Tramontana Dr. Antonio Triolo Dr. Carlo Alberto Maggi Dr. 《ChemMedChem》2010,5(1):65-78
Herein we describe the synthesis of a series of new potent tachykinin NK2 receptor antagonists by the modulation of the C‐ and N‐terminal moieties of ibodutant (MEN 15596, 1 ). The N‐terminal benzo[b]thiophene ring was replaced by different substituted naphthalenes and benzofurans, while further modifications were evaluated at the C‐terminal tetrahydropyran moiety. Most compounds demonstrated a high affinity for the human NK2 receptor and high in vitro antagonist potency, indicating that a wide range of substituents at both termini can be incorporated in the molecule without detrimental effects on the interactions with the NK2 receptor. Selected compounds were tested in vivo confirming their activity as NK2 antagonists. In particular, after both iv and id administration to guinea pig, compound 61 b was able to antagonize NK2‐induced colonic contractions with a potency and duration‐of‐action fully comparable to the reference compound 1 (MEN 15596, ibodutant). 相似文献
103.
Achim Streit Piotr Bala Alexander Beck-Ratzka Krzysztof Benedyczak Sandra Bergmann Rebecca Breu Jason Milad Daivandy Bastian Demuth Anastasia Eifer André Giesler Björn Hagemeier Sonja Holl Valentina Huber Nadine Lamla Daniel Mallmann Ahmed Shiraz Memon Mohammad Shahbaz Memon Michael Rambadt Morris Riedel Mathilde Romberg Bernd Schuller Tobias Schlauch Andreas Schreiber Thomas Soddemann Wolfgang Ziegler 《电信纪事》2010,65(11-12):757-762
UNICORE is a European Grid Technology with more than 10 years of history. Originating from the Supercomputing domain, the latest version UNICORE 6 has turned into a general-purpose Grid technology that follows established standards and offers a rich set of features to its users. The paper starts with an architectural insight into UNICORE 6, highlighting the workflow features, standards and the different clients. Next, the current state of advancement is presented by describing recent developments. The paper closes with an outlook on future planned developments. 相似文献
104.
105.
Valentina Di EgidioP. Oliveri T. WoodcockG. Downey 《Food research international (Ottawa, Ont.)》2011,44(2):544-549
Food and beverage processors require tools to monitor conformance of finished goods to their defined specification; regulatory authorities need appropriate methods for detecting retail fraud. In this report, samples (n = 275) of Belgian and other European beers were collected and analysed using near infrared transflectance spectroscopy; three class-modelling techniques (soft independent modelling of class analogy, SIMCA; potential functions techniques, POTFUN; and unequal dispersed classes, UNEQ) were employed to characterise beer types (firstly Trappist and then Rochefort) while a classification method (partial least squares discriminant analysis, PLS-DA) was applied to discriminate between two final beer classes: Rochefort 8° and Rochefort 10°. The class-models and the classification rules developed were validated by means of an external prediction set. A discussion on the appropriate use of these chemometric approaches is included. Modelling of Trappist beers met with limited success while model efficiencies for Rochefort samples were highest for SIMCA and UNEQ applications i.e. 81.4% and 84.5% respectively. The classification of beers as Rochefort 8? or Rochefort 10? was possible with an average correct classification rate of 93.4%. 相似文献
106.
Valentina V Zhurikhina Michael I Petrov Oksana V Shustova Yuri P Svirko Andrey A Lipovskii 《Nanoscale research letters》2013,8(1):324
We present a dispersion theory of the surface plasmon polaritons (SPP) in random metal-dielectric nanocomposite (MDN) consisting of bulk metal embedded with dielectric inclusions. We demonstrate that embedding of dielectric nanoparticles in metal results in the formation of the plasmonic bandgap due to strong coupling of the SPP at the metal-vacuum interface and surface plasmons localized at the surface of nanoinclusions. Our results show that MDN can replace metals in various plasmonic devices, which properties can be tuned in a wide spectral range. Being compatible with waveguides and other photonic structures, MDN offers high flexibility in the plasmonic system design. 相似文献
107.
108.
109.
Lev A. Slobozhanin Valentina M. Shevtsova J. Iwan D. Alexander José Meseguer José M. Montanero 《Microgravity science and technology》2012,24(2):65-77
This paper reviews the dynamics of breaking or oscillating axisymmetric liquid bridges, and estimates of the energy which
is needed to break a liquid bridge. We consider a liquid bridge spanning two coaxial equal disks with sharp edges and held
by surface-tension forces. The liquid volume is assumed to be conserved under perturbations, and the contact lines are pinned
to the disk edges. The perturbations are finite and axisymmetric. An analysis is based on the one-dimensional models previously
used in capillary jet theory and last several decades for study a liquid bridge dynamics. According to the scientific project
JEREMI (Japanese and European Research Experiment on Marangoni Instabilities), the first stage of the space experiment on
ISS will involve an isothermal liquid bridge with a gas blowing parallel to the axial direction of the bridge. The geometry
corresponds to a cylindrical volume liquid bridge coaxially placed into an outer cylinder with solid walls. The gas enters
the annular duct bounded by the outer cylinder and the internal system consisting of supporting vertical rods and the liquid
bridge. Considering that the bridge is small (the rod’s radii are 3 mm) and the gas velocity is typically (0.25 ÷ 0.37) m/s,
the perturbations cannot be considered small. Thus, one may assume that the amplitude of the liquid bridge perturbations is
sufficiently large that departures from linearity must be considered. 相似文献
110.
Valentina E. Smirnova Iosif V. Gofman Vladimir E. Yudin Irina P. Dobrovolskaya Alexander N. Shumakov Andrey L. Didenko Valentine M. Svetlichnyi Ellen Wachtel Rinat Shechter Hannah Harel Gad Marom 《Polymer Engineering and Science》2009,49(2):217-222
The solid state crystallization in drawn thermoplastic polyimide films is studied as a function of draw ratio (DR) under the effect of vapor grown carbon fiber nanoinclusions. The nucleating effect of the nanoinclusions coupled with the orientation effect of drawing generates a unique orientated layered lamellar structure, characteristic of smectic‐like mesophase. The degree of draw induced orientated crystallization increases with the content of nanoinclusions and with the DR, and is reflected in the mechanical behavior of the film. Generally, the Young's modulus and the yield point of the drawn crystalline films in the drawing direction are significantly higher compared with the noncrystalline counterparts. POLYM. ENG. SCI., 2009. © 2008 Society of Plastics Engineers 相似文献