112 research outputs found
Analysis of solar neutrino problem by means of Notzold and Nakagawa's approach including the interference term. - Hyperbolic-tangent profile for electron density in the sun and exact solution -
Using an exact solution with the hyperbolic-tangent profile for the electron density in the sun, which is developed by Notzold and later modified by Nakagawa, we have analyzed the solar neutrino problem. An interference term in their approach is correctly taken into account. Combining the hyperbolic-tangent profile with the BP2000, we obtain a phenomenological fitting in the analytic form. Combining recent observed results for survival probability P(Ξ½/!βΞ½/!) by the SNO, SK, SAGE, Gallex, GNO and Homestake Collaborations, we obtain a large mixing angle (LMA) whose figure looks like a shoulder.ArticleδΏ‘ε·ε€§ε¦ηε¦ι¨η΄θ¦ 38: 13-21(2004)departmental bulletin pape
Analyses of two and three pion Bose-Einstein Correlations using Coulomb wave functions
Using effective formulas we analyze the Bose-Einstein correlations (BEC) data
corrected for Coulomb interactions provided by STAR Collaboration and the
quasi-corrected data (raw data with acceptance correction etc) on 2\pi and 3\pi
BEC by using Coulomb wave function with coherence parameter included. The
corresponding magnitudes of the interaction regions turn out to be almost the
same: R_{Coul}(2\pi) \simeq \frac 32R_{Coul}(3\pi). R_{Coul} means the size of
interaction region obtained in terms of Coulomb wave function. This approximate
relation is also confirmed by the core-halo model. Moreover, the genuine 3rd
order term of BEC has also been investigated in this framework and its
magnitude has been estimated both in the fully corrected data and in the
quasi-corrected data.Comment: 12 pages, 5 figure
Analyses of k_t distributions at RHIC by means of some selected statistical and stochastic models
The new data on k_t distributions obtained at RHIC are analysed by means of
selected models of statistical and stochastic origin in order to estimate their
importance in providing new information on hadronization process, in particular
on the value of the temperature at freeze-out to hadronic phase.Comment: Modified version. One new figure, one new table and one reference
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Paxillin and Hic-5 Interaction with Vinculin Is Differentially Regulated by Rac1 and RhoA
Cell migration is of paramount importance to organism development and maintenance as well as multiple pathological processes, including cancer metastasis. The RhoGTPases Rac1 and RhoA are indispensable for cell migration as they regulate cell protrusion, cell-extracellular matrix (ECM) interactions and force transduction. However, the consequences of their activity at a molecular level within the cell remain undetermined. Using a combination of FRET, FRAP and biochemical analyses we show that the interactions between the focal adhesion proteins vinculin and paxillin, as well as the closely related family member Hic-5 are spatially and reciprocally regulated by the activity of Rac1 and RhoA. Vinculin in its active conformation interacts with either paxillin or Hic-5 in adhesions in response to Rac1 and RhoA activation respectively, while inactive vinculin interacts with paxillin in the membrane following Rac1 inhibition. Additionally, Rac1 specifically regulates the dynamics of paxillin as well as its binding partner and F-actin interacting protein actopaxin (Ξ±-parvin) in adhesions. Furthermore, FRET analysis of protein:protein interactions within cell adhesions formed in 3D matrices revealed that, in contrast to 2D systems vinculin interacts preferentially with Hic-5. This study provides new insight into the complexity of cell-ECM adhesions in both 2D and 3D matrices by providing the first description of RhoGTPase-coordinated protein:protein interactions in a cellular microenvironment. These data identify discrete roles for paxillin and Hic-5 in Rac1 and RhoA-dependent cell adhesion formation and maturation; processes essential for productive cell migration
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