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排序方式: 共有105条查询结果,搜索用时 31 毫秒
1.
2.
Francesca Di Gaudio Sergio Indelicato Roberto Monastero Grazia Ida Altieri Francesca Fayer Ornella Palesano Manuela Fontana Angelo B. Cefalù Massimiliano Greco David Bongiorno Serena Indelicato Angela Aronica Davide Noto Maurizio R. Averna 《Analytical and bioanalytical chemistry》2016,408(9):2215-2226
3.
Journal of Visualization - To enrich the three-dimensional experimental details of vortex structures in rotating Rayleigh–Bénard convection, we established a technique... 相似文献
4.
C. Canali C. Carraro D. Krasnicky V. Lagomarsino L. Di Noto G. Testera S. Zavatarelli 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2011,65(3):499-504
Antihydrogen experiments are currently based on non neutral electron, positron or
antiproton plasma manipulation techniques in cylindrical Malmberg-Penning traps. An
experimental study of a plasma manipulation technique based on off-axis diocotron
displacement is presented. The use of the autoresonant excitation of (1, 0) diocotron mode
of pure electron plasma allows a precise positioning of the plasma by moving it across the
magnetic field and allows dumping such plasma in a desired angular position. The
experimental procedure described here will pave the way to positron loading into an
off-axial Penning trap terminated with a positronium converter target as it is proposed
for the AEgIS experimental apparatus. The technique was studied over a range of confining
magnetic field values and reproduces experimental conditions similar to most of the
currently running antihydrogen experiments.
The efficiency of the autoresonant excitation – in terms of plasma expansion rate and
particle loss – is analyzed, studying the behaviour of electron plasma subjected to large
off-axial displacements, showing that this method fulfills the requirements imposed by the
AEgIS experiment. 相似文献
5.
Renato Noto Silvestre Buscemi Giuseppe Werber Domenico Spinelli 《Journal of heterocyclic chemistry》1987,24(5):1449-1452
The effect of micelles and mixed solvents on the decarboxylation of some N-alkyl- or N-aryl-substituted 5-amino-1,3,4-oxadiazole-2-carboxylic acids has been studied. The data support the unimolecular decarboxylation mechanism proposed by us. Moreover, they show that mixed solvents and micelles have different effects on reactivity of the amino acids under study. 相似文献
6.
Francesco Buccheri Giuseppe Cusmano Renato Noto Rosina Rainieri Giuseppe Werber 《Journal of heterocyclic chemistry》1987,24(2):521-523
The true identity of the 4-methyl-5-phenylimino-δ2-1,3,4-thiadiazoline (A) has been demonstrated. The reactions, previously reported in the literature to give A have been repeated and the structure of the compounds obtained has been established. 相似文献
7.
A simple and efficient synthesis of polystyrene-supported proline and prolinamide has been carried out. Polystyrene-supported proline has been used as organocatalyst in the asymmetric aldol reaction between cyclohexanone and substituted benzaldehydes in water without any additive. High yields, diastereoselectivities and ee values have been observed. The versatility of this resin was demonstrated in the α-selenenylation of aldehydes. Both proline and prolinamide resins gave high yields. Recycling studies showed that the proline resin gave better results than prolinamide resin. 相似文献
8.
Vito Di Noto Lucia A. Magrì Maria Viviani Carla Marega Antonio Marigo Roberto Zannetti 《Journal of chemical crystallography》1992,22(1):59-64
FT-IR Spectroscopy with total attenuated reflectance (ATR) was used for the quantitative determination of ethyl formate coordinated in inorganic matrices such as magnesium chloride. The spectra were recorded directly on solutions obtained by dissolving the inorganic Ziegler-Natta supports in water. The method proposed is sensitive and rapid and appears to be very reliable when compared with other methods, such as solvent extraction followed by gaschromatographic or thermogravimetric analysis. 相似文献
9.
A simple semi-empirical model which takes account of effects of the anisotropy and the strong coupling interaction in the expression of the energy gap together with the ellipsoidal energy spectrum is proposed to explain results of specific heat measurements on layer structure compound 2H-NbSe2. The thermodynamic properties such as the electronic specific heat and the thermodynamic critical field deduced from this model give good agreements with experimental results. 相似文献
10.
Michelangelo Gruttadauria Renato Noto Serena Riela 《Journal of heterocyclic chemistry》1998,35(4):865-869
The stereoselective synthesis of a 2-substituted tetrahydropyran with adjacent alkoxy-bearing stereogenic centre is described. The key steps of this synthesis were the stereoselective epoxidation of an allylic alcohol and the regioselective epoxide ring opening by lithium aluminum hydride. The regio and stereoselective synthesis of a trihydroxyselenide and a trihydroxysulfide is also described. The latter compounds are not suitable for cyclization to tetrahydrofuran ring. 相似文献