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61.
62.
63.
Lysozyme in aqueous dilute solution has been chosen as a model system to investigate the state and the mobility of water molecules near macromolecular surfaces. The dependence of the water proton NMR T1 on temperature and on denaturing processes is interpreted in terms of long-range interactions giving rise to“ordering” of water, as seen on the NMR time scale. 相似文献
64.
65.
Enzo Tonti 《Annali di Matematica Pura ed Applicata》1973,95(1):331-359
Summary The paper shows the key place of the choice of the bilinear form in order to give a variational formulation to a given problem.
In particular it is shown how the use of a convolution bilinear form makes possible a variational formulation for linear initial
value problems.
A critical survey of the three main methods that was devised in the past to solve the same problem is done.
This work has been sponsored by the Consiglio Nazionale delle Ricerche.
Entrata in Redazione il 19 novembre 1971. 相似文献
Sunto. La nota mette in evidenza il ruolo fondamentale della scelta di una forma bilineare al fine di dare formulazione variazionale ad un dato problema. In particolare è mostrato come l'uso di una forma bilineare di convoluzione renda possibile la formulazione variazionale dei problemi ai valori iniziali. Si fa un esame critico dei tre principali metodi che sono stati escogitati nel passato per risolvere lo stesso problema.
This work has been sponsored by the Consiglio Nazionale delle Ricerche.
Entrata in Redazione il 19 novembre 1971. 相似文献
66.
Donati A Pulselli FM Riccobono F Dallai L Francovich R Tiezzi E 《Annali di chimica》2005,95(3-4):161-166
The Colline Metallifere in SW Tuscany are characterized by strong anomalies in arsenic concentrations and distribution. The area is sparsely populated and largely wild, though it has been subject to human impact due to mining and metal processing since Etruscan and Roman times. In the Middle Ages it was exploited intensively for silver and copper. Until 1995, pyrite (FeS2) was mined and roasted to produce sulphuric acid and iron. Hypotheses based on geological and mineralogical factors formulated in the last 20 years have failed to explain the peculiar distribution of arsenic in the Colline Metallifere. Here we report preliminary results of widespread sampling and analysis of the fluvial sediments of rivers originating in this mining area. The data was analysed in relation to the archaeological features of the area, since the presence of ancient mining and ore processing sites can shed light on the peculiar distribution of arsenic. Comparison of data from two rivers and their respective contaminated and uncontaminated coastal lagoons also clarified the general mechanisms of arsenic mobility, pinpointing the source of arsenic contamination. The study methods also promise to be useful for discovering unknown archaeological sites. 相似文献
67.
68.
We find some logarithmic and exact small deviation asymptotics for the L
2-norms of certain Gaussian processes closely connected with a Wiener process. In particular, processes obtained by centering and integrating Brownian motion and Brownian bridge are examined. Bibliography: 28 titles.__________Published in Zapiski Nauchnykh Seminarov POMI, Vol. 298, 2003, pp. 5–21. 相似文献
69.
Enzo Martinelli 《Annali di Matematica Pura ed Applicata》1955,39(1):335-343
Sunto Si assegna una condizione necessaria e sufficiente per la validità di una formula diCaccioppoli generalizzazione2-dimensionale dell'indicatore logaritmico.
A Mauro Picone nel suo 70mo compleanno. 相似文献
70.
In this paper we consider the trees with fixed order n and diameter d≤4. Among these trees we identify those trees whose index is minimal. 相似文献