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F. Bulleri ([email protected]), Dipto di Scienze Botaniche. Ecologiche e Geologiche, Univ. di Sassari, Via Piandanna 4, IT-0071 Sassari, Italy. – FB, L. Benedetti-Cecchi, M. Cusson, E. Maggi, I. Bertocci, Dipto di Biologia, Univ. di Pisa, CoNISMa, Via Derna 1, IT-56126, Pisa, Italy. MC also at: Dépt des sciences fondamentales, Univ. du Québec à Chicoutimi, 555 Boulevard de l’Université...
در این تحقیق از کوپلیمریزاسیون nوn دیمتیل اکریل آمید و آلیل گلاسیدیل اتر در حضور بین nوn متیلن آکریل آمید به عنوان عامل اتصال دهنده عرضی و 2و2 آزوبیس (ایزوبوتیرونیتریل) به عنوان آغازگر، پلیمر قالب یونی جدیدی تهیه شد که مقدار تریس یون سرب را به صورت گزینش پذیر در محلولهای آبی جداسازی میکند. این پلیمر با تکنیکهای ftir، آنالیز وزن سنجی حرارتی (tga)، آنالیز عنصری (chn)، میکروسکوپ الکترونی روبشی...
William J. Sutherland, Robert P. Freckleton, H. Charles J. Godfray, Steven R. Beissinger, Tim Benton, Duncan D. Cameron, Yohay Carmel, David A. Coomes, Tim Coulson, Mark C. Emmerson, Rosemary S. Hails, Graeme C. Hays, Dave J. Hodgson, Michael J. Hutchings, David Johnson, Julia P. G. Jones, Matt J. Keeling, Hanna Kokko, William E. Kunin, Xavier Lambin, Owen T. Lewis, Yadvinder Malhi, Nova Mieszk...
The lowest-order correction of the density dependence of in-medium nucleonnucleon cross sections is obtained from geometrical considerations of Pauliblocking effects. As a by-product, it is shown that the medium corrections imply an 1/E energy dependence of the density-dependent term. PACS: 25.70.-z,25.75.Ld The nucleon-nucleon cross section is a fundamental input in theoretical calculations of...
ion of two chlorides from 2 or 4 may provide simple, monocoordinate, low-valent Sn or Pb dications if the strongly Lewis basic nature of the metal center can be harnessed to partly relieve the electron deciency of such a dication. The greater extent of Pt–M (M1⁄4 Sn, Pb) s donation in 7a and 8a over that in 4 and 2might provide enough electronic stabilization to attenuate the reactivity of the...
In analogy to the role of oxide anion in perovskites, halogen chemistry halide perovskites significantly contributes chemical, physical, and optoelectronic properties this class materials.Investigating manipulating site has improved our understanding electronic structure, reactivity, defect chemistry, ionic conductivity perovskites.A clear is expected (i) yield novel with targeted controlled (i...
We show that the transverse polarization asymmetry of the r-lepton in the decay t + bra is extremely sensitive to CP violating phases arising from the charged Higgs exchange in the Weinberg model of CP non-conservation. Qualitatively, the polarization asymmetries are enhanced over rate or energy asymmetries by a factor of x % x O(100). Thus for optimal values of the parameters the method m, req...
The force between two inert, planar surfaces in a liquid is discussed, focusing on the e ect of the reduction in the uid density between the surfaces. We use a density functional treatment of the uid, the results of which are veri ed by comparison with Grand Canonical Monte Carlo simulations. Our calculations reveal the existence of an attractive force between the surfaces, which at short and i...
Development of overall strategies for observations of the Earth system has received considerable attention in recent years. Most attention has been paid to space-based observations but of comparable importance is the wide variety of in situ observations made at the surface of the Earth and in its atmosphere and oceans. The in situ data are essential for the success of global observations and th...
We are interested in nite-time blow-up phenomena for heat equations of the type: @u @t = u+ jujp 1u (1) where u : (x; t) 2 RN [0; T )! R, 1 < p, (N 2)p < N + 2. We rst construct for (1) a solution u which blows-up in nite time T at only one blow-up point x0 2 RN , and describe completely its blow-up pro le (or asymptotic behavior). This construction is based on a priori estimates' technique whi...
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