Laser-scanning two-photon microscopy offers well-known advantages for imaging deeper into living tissue, but even in relatively translucent organisms like the zebrafish or albino Xenopus tadpole it can be a powerful tool for studying brain development [1]. The visual system in the Xenopus tadpole utilizes both molecular guidance and activity-dependent cues to form appropriate connections [2]. N...

We discuss the role of the dilaton tadpole in the holographic description of non-supersymmetric gauge theories that are conformal in the planar limit. On the string theory side, the presence of the dilaton tadpole modifies the AdS background inducing a logarithmic running for the radius and the dilaton. Using the holographic prescription we compute the Wilson loop on the gravity side and find a...

We present a comprehensive study of the masses of pseudoscalar and vector mesons, as well as octet and decuplet baryons computed in O(a)-improved quenched lattice QCD. Results have been obtained using the nonperturbative definition of the improvement coefficient csw , and also its estimate in tadpole improved perturbation theory. We investigate effects of improvement on the incidence of excepti...

We study D = 4, N = 1, type IIA orientifold with orbifold group ZN and ZN × ZM . We calculate one-loop vacuum amplitudes for Klein bottle, cylinder and Möbius strip and extract the tadpole divergences. We find that the tadpole cancellation conditions thus obtained are satisfied by the Z4, Z8, Z ′ 8, Z ′ 12 orientifolds while there is no solution for Z3, Z7, Z6, Z ′ 6, Z12. The Z4 × Z4 type IIA ...

Transgenic tadpoles that express a dominant negative thyroid hormone (TH) receptor specifically in their skin undergo normal metamorphosis, with one exception: they retain a larval epidermis over the developing adult epithelium. TH-induced death of the tadpole epidermis is inhibited by the dominant negative TH receptor whereas the TH-induced response of the neighboring fibroblasts and the cells...