University of Illinois, USA We will report the design and performance of a MR-compatible SPECT system that utilizes a dual-FOV aperture design for microscopic SPECT imaging of small animals inside an pre-existing MR scanner. The MRC-SPECT-DF system consists of a full ring of high resolution CdTe detectors and an aperture that consists of dual-FOV aperture system design that has two sets of aper...

AAA+ proteins form large, ring-shaped complexes, which act as energy-dependent unfoldases of macromolecules. Many crystal structures of proteins in this superfamily have been determined, but mostly in monomeric or non-physiological oligomeric forms. The assembly of ring-shaped complexes from monomer coordinates is, therefore, of considerable interest. We have extracted structural features of co...

0019-1035/$ see front matter 2011 Elsevier Inc. A doi:10.1016/j.icarus.2011.05.031 ⇑ Corresponding author. E-mail address: [email protected] (H.F. Levison We present a scenario for building the equatorial ridge and de-spinning Iapetus through an impact-generated disk and satellite. This impact puts debris into orbit, forming a ring inside the Roche limit and a satellite outside. This satelli...

The effects of local anesthetics were examined on a family of transiently expressed neuronal calcium channels. Fomocaine, a local anesthetic containing a morpholine ring, preferentially blocked (Y,~ channels (Ki = 100 PM), and had a lower affinity (3to 15fold) for (Y,~, (Y,~, and cz,c channels. Block was incompletely reversible, followed I:1 kinetics, and did not affect steady-state inactivatio...

Despite the emergence of catalytic C(sp3)–H arylation at remote ?-position via challenging six-membered ring cyclometalation, requirement blocking more reactive ?-position represents a restricting limitation. The use removable N-(2-pyridyl)sulfonyl directing group provides viable solution to this challenge, expanding scope Pd-catalyzed ?-C–H ?-amino acid and amine derivatives with (hetero)aryl ...

in this paper, we introduce the new notion of strongly j-clean rings associatedwith polynomial identity g(x) = 0, as a generalization of strongly j-clean rings. we denotestrongly j-clean rings associated with polynomial identity g(x) = 0 by strongly g(x)-j-cleanrings. next, we investigate some properties of strongly g(x)-j-clean.