High endothelial venules (HEV) allow rapid and selective lymphocyte trafficking from the blood into secondary lymphoid tissues. Here we report the expression profile of active genes in mouse high endothelial cells (HEC). HEC were first purified from mouse lymph nodes (LN) by magnetic cell sorting with MECA-79 mAb and a 3'-directed cDNA library that faithfully represents the composition of mRNA ...

where G is a finite group and L is a faithful ZG-lattice of finite rank, i.e., a free Z-module of finite rank on which G acts faithfully. Let X be a flat manifold with fundamental group Γ. The group Aff(X) of affine self-equivalences of X is a Lie group. Its identity component Aff0(X) is a torus whose dimension is the rank of the center of Γ, and Aff(X)/Aff0(X) is isomorphic to Out(Γ), the oute...

Förster resonance energy transfer (FRET) between fluorescent proteins (FPs) provides insights into the proximities and orientations of FPs as surrogates of the biochemical interactions and structures of the factors to which the FPs are genetically fused. As powerful as FRET methods are, technical issues have impeded their broad adoption in the biologic sciences. One hurdle to accurate and repro...

We consider maximal globally hyperbolic flat (2+1) spacetimes with compact space S of genus g > 1. For any spacetime M of this type, the length of time that the events have been in existence is M defines a global time, called the cosmological time CT of M , which reveals deep intrinsic properties of spacetime. In particular, the past/future asymptotic states of the cosmological time recover and...

In this paper‎, ‎we study the class of rings in which every $P$-flat‎ ‎ideal is flat and which will be called $PFF$-rings‎. ‎In particular‎, ‎Von Neumann regular rings‎, ‎hereditary rings‎, ‎semi-hereditary ring‎, ‎PID and arithmetical rings are examples of $PFF$-rings‎. ‎In the context domain‎, ‎this notion coincide with‎ ‎Pr"{u}fer domain‎. ‎We provide necessary and sufficient conditions for‎...