HISTORICAL PERSPECTIVES AND SUMMARY ........................................... 229 REC BCD ENZYME ................................................................................. 231 REC A PROTEIN ..................................................................................... 234 Structure of recA Protein ....................................................................... 234 Basic ...

Let P be a set of n points in the plane where each point p is associated with radius \(r_p>0\). The transmission graph \(G=(P,E)\) defined as directed such that E contains an edge from to q if and only \(|pq|\le r_p\) for any two P, |pq| denotes Euclidean distance between q. In this paper, we present data structure size \(O(n^{5/3})\) can check \(O(n^{2/3})\) time there path G points. This firs...

No recombination between plasmids was observed after conjugal transfer of a plasmid into a cell carrying another plasmid. Two types of such recombination took place after transformation, one type being Rec+ dependent and suggesting a preferred site of recombination. The other much rarer type was at least partially Rec+ independent.

Reachability and observability criteria are obtained for 2D continuous-discrete time-variable Attasi type systems by using suitable 2D reachability and observability Gramians. Necessary and sufficient conditions of reachability and observability are derived for time-invariant systems. The duality between the two concepts is emphasized as well as their connection with the minimality of these sys...

Positive reachability and positive observability of positive linear systems on time scales are studied. Differential and integral calculus on time scales allows for unified treatment of continuousand discrete-time systems. Reachability and observability graphs for positive systems are introduced. They are used to characterize positive reachability and positive observability for systems on homog...

BACKGROUND Maintaining tracheal integrity and restoring normal physiologic function after injury is complex. Some of the critical events in this process are deposition of a provisional extracellular matrix, tissue remodeling, and angiogenesis. These events are coordinated with epithelial migration and proliferation to restore the mucosal barrier. The ability of respiratory epithelial cells (REC...