Homing pigeons (Columba livia f.d.) are well-known for their homing abilities, and their brains seem to be functionally adapted to homing as exemplified, e.g. by their larger hippocampi and olfactory bulbs. Their hippocampus size is influenced by navigational experience, and, as in other birds, functional specialisation of the left and right hemispheres ('lateralisation') occurs in homing pigeo...

BACKGROUND AND OBJECTIVES The role of adhesion molecules (AM) and CXCR4 in the homing of CD34+ cells to NOD/SCID marrow and spleen is not completely elucidated. In this work, we study the differences in the expression of CXCR4 and AM by human CD34+ cells from different sources and their impact on homing ability in NOD/SCID mice. DESIGN AND METHODS We used flow cytometry to analyze the express...

[-10]For local homing navigation, an agent is supposed to return home based on the surrounding environmental information. According to the snapshot model, the home snapshot and the current view are compared to determine the homing direction. In this paper, we propose a novel homing navigation method using the moment model. The suggested moment model also follows the snapshot theory to compare t...

I have been involved in a publication showing that sublethal exposures to thiamethoxam, a neonicotinoid pesticide, increase the risk of homing failure in foraging honeybees (Henry et al., 2012a). Along with other recent toxicological studies on free-ranging bees (Gill et al., 2012; Schneider et al., 2012; Whitehorn et al., 2012), those results have motivated the European Food Safety Agency (EFS...

In mucosal immunology, the importance of homing of specific T and B lymphocyte memory cells back to their antigen’s tissue of origin has long been established (1). Elucidation of the mechanisms of such homing and their role in pathogenesis and immunodeficiency may provide targets for immunotherapy or vaccines (2). Recently, there has been intense interest in lymphocyte homing during the pathoge...

Closed-form reliability functions for the wellknown dual homing configuration for the Fiber Distributed Data Interface (FDDI) are derived. The new reliability functions are then compared to that of the dual ring configuration, which again show that the dual homing network is often more reliable than the dual ring network; however, the model analysis also shows that dual homing is recommended on...

Many animals, including many arachnids, return to an established “home” after active period. Although desert-adapted solifuges shelter from the sun in retreats, it is unknown if these and re-use same retreats over multiple consecutive periods. We sought investigate whether individual exhibit site fidelity (philopatry) could be found repeatedly within small geographic area using a simple mark-an...

The factors affecting the olfaction-based navigational performances of homing pigeons released at relatively long distance (beyond 100 km from home) have in past been subject to several investi...

RESEARCH in avian migratory orientation has centered on the environmental stimuli that may serve as cues (see Adler 1970, Bellrose 1972, Emlen 1975). Most such studies have dealt primarily with long-distance migrants or trained homing pigeons (Columba livia) (Keeton 1974). Few experiments have explored the orientation mechanism(s) of nonmigrants, partial, or short-distance migrants. As Bellrose...

Abstract In this study, we performed RNA sequencing of Prx II +/+ and ?/? dermal mesenchymal stem cells (DMSCs) to identify differentially expressed genes (DEGs). To explore the role in DMSCs, Gene Ontology analysis DEGs. The results showed that DEGs were mainly involved biological processes cell migration, intercellular adhesion, coordination regulation homing. Through construction protein–pro...