Rat liver gap junctions were isolated in Ca2+-free media and analyzed in controlled environments by x-ray diffraction of partially oriented pellets. Different treatments of the same preparations were compared. The ordered hexagonal lattices gave rise to detail that was sensitive to low Ca2+ concentrations (0.05 mM), but not to Mg2+ (up to 0.16 mM) or pH (between 6.0 and 8.0). The major Ca2+-med...

D. A. Muller,1,2 D. A. Shashkov,3 R. Benedek,3 L. H. Yang,4 J. Silcox,1 and D. N. Seidman3 1School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853 2Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974 3Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208 4Condensed Matter Physics Division, Lawrence Liv...

abstract: the gap between supplied services and people’s expectations is a fundamental problem upon the connection between municipality and citizens. the main objective of this research is to survey the synchronization measure of supplied services by mashhad’s municipality toward mashhad citizens’ expectations. descriptive and analytical methods are implemented in this research. chosen sa...

air spindles are one of the main elements of precise machine tools. vibration of these spindles is one of the vital issues necessary for investigation. among parameters which influence air spindle vibrations are rotational speed, compression air method, input nozzle diameter, air gap pressure. in this study using ansys, the effects of air gap thickness on air spindle vibrations have been invest...

the aim of this paper is to explain the relationship between generation gap and democracy in iran in the last fifty years. to do so, the writers have used the results of the national polls conducted in 1974, 1995 and 2002 in their attempt to clarify the activeness or inactiveness of the generation gap by analyzing the differences between the attitudes, values and behaviors of the young and adul...

We consider the problem of budget feasible mechanism design proposed by Singer (2010), but in a Bayesian setting. A principal has a public value for hiring a subset of the agents and a budget, while the agents have private costs for being hired. We consider both additive and submodular value functions of the principal. We show that there are simple, practical, ex post budget balanced posted pri...

Land-cover mapping efforts within the USGS Gap Analysis Program have traditionally been state-centered; each state having the responsibility of implementing a project design for the geographic area within their state boundaries. The Southwest Regional Gap Analysis Project (SWReGAP) was the first formal GAP project designed at a regional, multi-state scale. The project area comprises the southwe...