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91.
The isovector and isotensor energy differences between yrast states of isobaric multiplets in the lower half of the pf region are quantitatively reproduced in a shell model context. The isospin nonconserving nuclear interactions are found to be at least as important as the Coulomb potential. Their isovector and isotensor channels are dominated by J=2 and J=0 pairing terms, respectively. The results are sensitive to the radii of the states, whose evolution along the yrast band can be accurately followed. 相似文献
92.
We describe a very rapid high-performance capillary electrophoresis method for the separation and quantification of reduced (GSH) and oxidized (GSSG) glutathione in red blood cells. Two procedures for sample preparation have been compared, Microcon-10 membrane filtration and acid precipitation. The separation is obtained in an uncoated capillary using a high ionic strength borate buffer at pH 7.8. The intra-assay coefficients of variation (CVs%) are 1.53 and 1.66 for GSH and GSSG, respectively. The run is shorter than 90 s and the migration time is highly reproducible both for GSH (CV% 0.22) and GSSG (CV% 0.17). When the filtration step is used only GSH is found, whereas both GSH and GSSG are detectable after acid precipitation, suggesting that GSSG revealed after acid treatment may be an artefact due to GSH oxidation. Because of its good analytical performance this method could be used for routine red blood cell glutathione measurement in healthy or pathological conditions. 相似文献
93.
94.
G. de Angelis T. Martinez A. Gadea N. Marginean E. Farnea E. Maglione S. Lenzi W. Gelletly C.A. Ur D.R. Napoli Th. Kroell S. Lunardi B. Rubio M. Axiotis D. Bazzacco A.M. Bizzeti Sona P.G. Bizzeti P. Bednarczyk A. Bracco F. Brandolini F. Camera D. Curien M. De Poli O. Dorvaux J. Eberth H. Grawe R. Menegazzo G. Nardelli J. Nyberg P. Pavan B. Quintana C. Rossi Alvarez P. Spolaore T. Steinhart I. Stefanescu O. Thelen R. Venturelli 《The European Physical Journal A - Hadrons and Nuclei》2001,12(1):51-55
Gamma ray transitions de-exciting states in the N = Z nucleus 70Br have been identified for the first time using the GASP and EUROBALL arrays coupled with ancillary detectors. The level
scheme of 70Br has been established by means of particle-gated γ-γ and γ-γ-γ coincidences. The Coulomb energy differences between isobaric
analogue states in 70Br and 70Se show a deviation from the expected behaviour which could be related to dripline effects.
Received: 18 July 2001 / Accepted: 25 September 2001 相似文献
95.
C. Mazzocchi Z. Janas J. Döring M. Axiotis L. Batist R. Borcea D. Cano-Ott E. Caurier G. de Angelis E. Farnea A. Faßbender A. Gadea H. Grawe A. Jungclaus M. Kapica R. Kirchner J. Kurcewicz S.M. Lenzi T. Martínez I. Mukha E. Nácher D.R. Napoli E. Roeckl B. Rubio R. Schwengner J.L. Tain C.A. Ur 《The European Physical Journal A - Hadrons and Nuclei》2001,12(3):269-277
By using the fusion-evaporation reaction 28Si(36Ar,p3n) and spectroscopy of β-delayed γ-rays and charged particles on mass-separated sources, β-decay properties of the neutron-deficient
isotope 60Ga were studied for the first time. The half-life of 60Ga was determined to be 70(15) ms, and, based on βγγ coincidences, the isobaric-analogue state in 60Zn was identified at 4851.9(7) keV. A semiempirical proton separation energy value of 40(70) keV was deduced for 60Ga. The experimental results on half-life, mass excess, proton separation energy, and structure of the 60Zn daughter states are discussed in comparison with various model predictions, including large-scale shell model calculations.
Received: 4 September 2001 / Accepted: 12 November 2001 相似文献
96.
A. Andronic F. Arleo R. Arnaldi A. Beraudo E. Bruna D. Caffarri Z. Conesa del Valle J. G. Contreras T. Dahms A. Dainese M. Djordjevic E. G. Ferreiro H. Fujii P.-B. Gossiaux R. Granier de Cassagnac C. Hadjidakis M. He H. van Hees W. A. Horowitz R. Kolevatov B. Z. Kopeliovich J.-P. Lansberg M. P. Lombardo C. Lourenço G. Martinez-Garcia L. Massacrier C. Mironov A. Mischke M. Nahrgang M. Nguyen J. Nystrand S. Peigné S. Porteboeuf-Houssais I. K. Potashnikova A. Rakotozafindrabe R. Rapp P. Robbe M. Rosati P. Rosnet H. Satz R. Schicker I. Schienbein I. Schmidt E. Scomparin R. Sharma J. Stachel D. Stocco M. Strickland R. Tieulent B. A. Trzeciak J. Uphoff I. Vitev R. Vogt K. Watanabe H. Woehri P. Zhuang 《The European Physical Journal C - Particles and Fields》2016,76(3):107
97.
Thiago Manha Gasparini Rosário Elida Suman Bretas Aline Bruna da Silva Rinaldo Gregorio Jr. 《Journal of Polymer Science.Polymer Physics》2012,50(18):1304-1311
Mats of highly oriented poly(vinylidene fluoride) nanofibers were electrospun by means of a conventional electrospinning equipment; the orientation, however, was obtained using a disk collector rotating at a speed of 4000 rpm and a device that reduced the influence of air displacement during nanofiber orientation. Thermal transitions of the mats were determined by differential scanning calorimetry, the predominant crystalline phase by Fourier transform infrared spectroscopy and wide‐angle X‐ray scattering and the nanofiber orientation and morphology by scanning electron microscopy. Relative permittivity, loss index, stable remnant polarization, and coercive field of the mats were also determined and compared with those obtained for a mat electrospun at 2000 rpm and an oriented commercial film. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 000: 000–000, 2012 相似文献
98.
Bruna Clara De Simone Angelo Domenico Quartarolo Sante Cospito Lucia Veltri Giuseppe Chidichimo Nino Russo 《Theoretical chemistry accounts》2012,131(5):1225
A new triarylamine derivative, N,N′-Bis(4-heptanoylamidophenyl)-N,N′-di(4-methoxyphenyl)-1,4-phenylenediamine, with stable electrochromism in near-infrared and visible light regions, has been
synthesized and characterized at theoretical and experimental level. The detected and simulated spectra, with and without
the presence of an external potential at different values, clearly show that this mixed-valence system undergoes ionization
at a low value of the applied potential, and the formed radical cation absorbs in the near-infrared region with an intense
peak located at 1,040 nm. Density functional computations give the geometrical structure and absorption properties in very
good agreement with experiment, allowing assigning the electronic transition and contributing to an understanding of the electron-transfer
process between the two redox centers. 相似文献
99.
Dr. Vito Maltese Dr. Sante Cospito Dr. Amerigo Beneduci Dr. Bruna Clara De Simone Prof. Nino Russo Prof. Giuseppe Chidichimo Prof. René A. J. Janssen 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(29):10179-10186
Thienosquaraines are an interesting class of electroactive dyes that are useful for applications in organic electronics. Herein, the redox chemistry and electrochromic response of a few newly synthesized thienosquaraines are presented. These properties are compared to those of the commercial 2,4‐bis[4‐(N,N‐diisobutylamino)‐2,6‐dihydroxyphenyl]squaraine. The stability of the radical ions formed in electrochemical processes strongly affects these properties, as shown by cyclic voltammetry, in situ spectroelectrochemistry, and quantum chemical calculations. Furthermore, all of the dyes show aggregation tendency resulting in panchromatic absorption covering the whole UV/Vis spectral range. 相似文献
100.
An analytical expression for the relaxation time of a nematic liquid crystal is obtained for the first time by considering the influence of surface viscosity, anchoring energy strength and cell gap, validated numerically by using the so-called relaxation method. This general equation for the molecular response time (τ0) was derived for a vertical aligned cell and by solving an eigenvalue equation coming from the usual balance of torque equation in the Derzhanskii and Petrov formulation, recovering the usual equations in the appropriate limit. The results show that τ∼db, where b=2 is observed only for strongly anchored cells, while for moderate to weak anchored cells, the exponent lies between 1 and 2, depending on both, surface viscosity and anchoring strength. We found that the surface viscosity is important when calculating the response time, specially for thin cells, critical for liquid crystal devices. The surface viscosity’s effect on the optical response time with pretilt is also explored. Our results bring new insights about the role of surface viscosity and its effects in applied physics. 相似文献