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排序方式: 共有466条查询结果,搜索用时 15 毫秒
51.
H R Morris A Chatterjee M Panico B N Green M A Almeida da Silva B S Hartley 《Rapid communications in mass spectrometry : RCM》1989,3(4):110-116
Two-sector linked-scan analysis of an unpurified proteolytic digest of a pyruvate decarboxylase enzyme (60,000 Da) has allowed the discovery and assignment of an amino-terminal post-translational modification and processing event. A difference in amino acid sequence from that predicted by a recently published nucleotide sequence has also been found. These results illustrate both the use and considerable potential of linked-scan methods for the analysis of complex biopolymer mixtures. 相似文献
52.
Rita Giuliano Antonini Yuriy Kozachenko Andrei Volodin 《Journal of Mathematical Analysis and Applications》2008,338(2):1188-1203
The almost sure convergence of weighted sums of φ-subgaussian m-acceptable random variables is investigated. As corollaries, the main results are applied to the case of negatively dependent and m-dependent subgaussian random variables. Finally, an application to random Fourier series is presented. 相似文献
53.
Summary The influence of the alloying on the electronic properties of the b.c.c. Li−Mg solid solution has been investigated within
the KKR-CPA framework. Such an influence has been studied by computing the band structure, Fermi surface, soft X-ray spectra,
residual resistivity and Auger spectra for chosen values of the composition. The theoretical results we obtained are in fair
agreement with the surface existing experimental data and support the view that also in ?simple metals? alloys care has to
be taken in studying such systems in terms of low-order perturbation approaches.
Riassunto Sono state studiate varie proprietà elettroniche delle leghe di Li−Mg nell’intervallo di concentrazione in cui questi sistemi cristallizzano nel reticolo b.c.c. In particolare sono state calcolate la struttura a bande, le superfici di Fermi, la resistività residua, gli spettri X ed Auger e si sono confrontati i risultati con i dati sperimentali esistenti. Il buon accordo fra risultati teorici e dati sperimentali indica che, anche per leghe di metalli semplici, gli approcci perturbativi a basso ordine possono essere insufficienti a descrivere il comportamento di tali sistemi.
Резюме В рамках KKR-CPA исследуется влияние процесса сплавления на электронные свойства объемноцетририованного кубического твердого раствора Li−Mg. Проводятся вычисления зонной структуры, поверхности Ферми, спектров мягкого рентгеновского излучения, остаточного сопротивления и Ож-ye-спектров для выбранных величин состава. Полученные теоретические величины хорошо согласуются с существуюими экспериментальными данными.相似文献
54.
55.
Rita Giuliano Claudio Macci Barbara Pacchiarotti 《Journal of Mathematical Analysis and Applications》2014
In this paper we study some sequences of weighted means of continuous real valued Gaussian processes. More precisely we consider suitable generalizations of both arithmetic and logarithmic means of a Gaussian process with covariance function which satisfies either an exponential decay condition or a power decay condition. Our aim is to provide limits of variances of functionals of such weighted means which allow the application of some large deviation results in the literature. 相似文献
56.
57.
58.
S. A. Koldobskiy O. Adriani G. A. Bazilevskaya G. C. Barbarino R. Bellotti E. A. Bogomolov M. Boezio V. Bonvicini M. Bongi S. Bottai A. Bruno A. Vacchi E. Vannuccini G. I. Vasilyev S. A. Voronov A. M. Galper C. De Santis V. Di Felice G. Zampa N. Zampa M. Casolino D. Campana A. V. Karelin P. Carlson G. Castellini F. Cafagna A. A. Kvashnin A. N. Kvashnin S. V. Koldashov S. Y. Krutkov A. A. Leonov A. G. Mayorov V. V. Malakhov M. Martucci L. Marcelli W. Menn M. Merge V. V. Mikhailov E. Mocchiutti A. Monaco N. Mori R. Munini G. Osteria B. Panico P. Papini P. Picozza M. Pearce M. Ricci S. B. Ricciarini M. F. Runtso M. Simon R. Sparvoli P. Spillantini Y. I. Stozhkov Y. T. Yurkin 《Bulletin of the Russian Academy of Sciences: Physics》2017,81(2):151-153
The preliminary results from measurements of deuteron fluxes in galactic cosmic rays (GCR) in the vicinity of the Earth in 2006–2009 are presented. The results are obtained by analyzing data from the PAMELA experiment aboard the Resurs DK-1 satellite. High-precision detection instruments provided an opportunity to identify GCR deuterons and measure their spectrum in the energy interval of 90–650MeV/nucleon. Spectra averaged over six-month intervals from the summer of 2006 to the summer of 2009 (the solar activity minimum) are presented. The influence of solar modulation on the observed spectrum is clearly seen in the results. 相似文献
59.
Giuliano Alagona Caterina Ghio Alessandro Giolitti Susanna Monti 《Theoretical chemistry accounts》1999,101(1-3):143-150
Several histidine-tryptophan complexes (either stacked or T-shaped), derived from the crystal structures available in the
Brookhaven Protein Data Bank, have been examined with molecular mechanics (MM), using the Tripos force field with Gasteiger-Hückel
charges, whose trend was found to be analogous to the AMBER or CHARMM ones. The MM results were compared to the ab initio
MP2 results, with and without counterpoise (CP) correction, previously obtained using extended basis sets on 5-methylimidazole
and indole as model systems. MM seems to underestimate the interaction energy between the two monomers when compared to the
uncorrected MP2 results, while the agreement is much better after including the CP correction at the MP2 level in all cases.
MM was thus used to qualitatively analyse the dependence of the stacking energy on the ring rotation at a variable distance
and ring centroid displacement for these systems, while keeping the rings in parallel planes. An analogous study was carried
out for a T-shaped adduct.
Received: 24 March 1998 / Accepted: 3 September 1998 / Published online: 1 February 1999 相似文献
60.
Daniel P. Silva Tomáš Brányik Giuliano Dragone António A. Vicente José A. Teixeira João B. Almeida e Silva 《Chemical Papers》2008,62(1):34-41
This study deals with two innovative brewing processes, high gravity batch and complete continuous beer fermentation systems.
The results show a significant influence of the variables such as concentration and temperature on the yield factor of the
substrate into ethanol and consequently on the productivity of the high gravity batch process. The technological feasibility
of continuous production of beer based on yeast immobilization on cheap alternative carriers was also demonstrated. The influence
of process parameters on fermentation performance and quality of the obtained beers was studied by sensorial analysis. No
significant difference in the degree of acceptance between the obtained products and some traditional market brands was found.
Presented at the 34th International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, 21–25 May
2007. 相似文献