Formation of strong L10-FePd/α-Fe nanocomposite magnets by visualizing efficient exchange coupling

FORC analysis distinguished a microscopically undetectable difference in phase-segregation structure in nanocomposite magnets, finding both efficient and inefficient exchange coupling.

Residential Segregation in Warsaw and its Metropolitan Area in the Context of Changing Housing Policy

Warsaw and its metropolitan area seem an interesting testing ground for research on the phenomenon of residential segregation in the context of the evolution of housing policy, since the city has been subject to significant changes as a result of historical events. Each of these contributed to alterations in the level and the character of residential segregation. The goal of this article is to answer the following question: Was the changing housing policy in Warsaw and the surrounding metropolitan area during the transformation period and afterwards accompanied by a modification of the segregation structure and what differences can be noticed in the whole of the metropolitan area and in the city itself?

The effect of segregation structure on the colossal permittivity properties of (La0.5Nb0.5)xTi1−xO2 ceramics

The activation energies of the grain-boundary and different polarizations are researched to reveal the effect of the segregation structure on the performance.

p21-Activated Kinases Cla4 and Ste20 Regulate Vacuole Inheritance in Saccharomyces cerevisiae

ABSTRACT Each time Saccharomyces cerevisiae cells divide they ensure that both the mother and daughter cell inherit a vacuole by actively transporting a portion of the vacuole into the bud. As the mother cell begins budding, a tubular and vesicular segregation structure forms that is transported into the bud by the myosin V motor Myo2, which is bound to the vacuole-specific myosin receptor, Vac17 (41, 59, 70, 79). Upon arriving in the bud the segregation structure is resolved to found the daughter vacuole. The mechanism that regulates segregation structure resolution in a spatially dependent manner is unknown. In addition to resolving the segregation structure, Vac17 is degraded specifically in the bud to provide directionality to vacuole inheritance. It has been proposed that bud-specific degradation of Vac17 is promoted by proteins localized to or activated solely in the bud (77). The p21-activated kinases (PAKs) Cla4 and Ste20 are localized to and activated in the bud. Here we report that Cla4 is localized to the segregation structure just prior to segregation structure resolution, and cells lacking PAK function fail to resolve the segregation structure. Overexpression of either Cla4 or Ste20 inhibited vacuole inheritance and this inhibition was suppressed by the expression of nondegradable VAC17. Finally, PAK activity was required for Vac17 degradation in late M phase and CLA4 overexpression promoted Vac17 degradation. We propose that Cla4 and Ste20 are bud-specific proteins that play roles in both segregation structure resolution and the degradation of Vac17.

THE STUDY OF SURFACE SEGREGATION, STRUCTURE, AND VALENCE BAND DENSITY OF STATES OF Pt3Ni(100), (110), AND (111) CRYSTALS

The surface segregation, structure, and valence band density of states of Pt 3 Ni (100), (110), and (111) single crystals are characterized with low energy ion scattering (LEIS), low energy electron diffraction (LEED), and ultraviolet photoemission spectroscopy (UPS). The results of LEIS clearly reveal the complete surface segregation of Pt to the top layer on all crystal alloys. LEED indicates the (5 × 1) surface reconstruction on the Pt 3 Ni (100), while (110) and (111) surfaces show (2 × 1) and (1 × 1) patterns, respectively, identical to Pt single crystals. The valence bands density of states on Pt 3 Ni alloys are compared to those of Pt single crystals via UPS measurements.

Thioredoxin is required for vacuole inheritance in Saccharomyces cerevisiae.

The vacuole of Saccharomyces cerevisiae projects a stream of tubules a and vesicles (a "segregation structure") into the bud in early S phase. We have described an in vitro reaction, requiring physiological temperature, ATP, and cytosol, in which isolated vacuoles form segregation structures and fuse. This in vitro reaction is defective when reaction components are prepared from vac mutants that are defective in this process in vivo, Fractionation of the cytosol reveals at least three components, each of which can support the vacuole fusion reaction, and two stimulatory fractions. Purification of one "low molecular weight activity" (LMA1) yields a heterodimeric protein with a thioredoxin subunit. Most of the thioredoxin of yeast is in this complex rather than the well-studied monomer. A deletion of both S. cerevisiae thioredoxin genes causes a striking vacuole inheritance defect in vivo, establishing a role for thioredoxin as a novel factor in this trafficking reaction.