Results 11 to 20 of about 48,206 (220)

Tracing Galaxy Assembly: Tadpole Galaxies in the Hubble Ultra Deep Field [PDF]

open access: yes, 2005
In the Hubble Ultra Deep Field (HUDF) an abundance of galaxies is seen with a knot at one end plus an extended tail, resembling a tadpole. These "tadpole galaxies" appear dynamically unrelaxed--presumably in an early merging state--where tidal ...
A. N. Straughn   +7 more
core   +1 more source

Tadpole versus anomaly cancellation in D=4,6 compact IIB orientifolds [PDF]

open access: yes, 1999
It is often stated in the literature concerning D=4,6 compact Type IIB orientifolds that tadpole cancellation conditions i) uniquely fix the gauge group (up to Wilson lines and/or moving of branes) and ii) are equivalent to gauge anomaly cancellation. We
Aldazabal, G.   +3 more
core   +2 more sources

Influence of 50-Hz Electromagnetic Field on Anurian (Xenopus laevis) Metamorphosis

open access: yesThe Scientific World Journal, 2004
In this study, we show the effect of a 1-mT magnetic field AC at 50 Hz on Xenopus laevis tadpole populations. In the course of a 65-day exposure to the field, tadpole survival showed a small, but significant, decrease (p < 0.0004), together with a ...
S. Grimaldi   +5 more
doaj   +1 more source

Class A Scavenger Receptors Are Used by Frog Virus 3 During Its Cellular Entry

open access: yesViruses, 2019
Frog virus 3 (FV3) is the type species of the genus Ranavirus (family Iridoviridae). FV3 and FV3-like viruses are globally distributed infectious agents with the capacity to replicate in three vertebrate classes (teleosts, amphibians, and reptiles).
Nguyen T. K. Vo   +4 more
doaj   +1 more source

Antipredator pheromones in amphibians: a review

open access: yesVeterinární Medicína, 2006
Specific chemosignals (pheromones) have an important role in the antipredator behaviour in amphibians and other vertebrates. However, relatively little is known about the occurrence of chemical alarm cues just in amphibians.
J. Rajchard
doaj   +1 more source

Microhabitat features determine the tadpole diversity in mountainous streams

open access: yesEcological Indicators, 2021
The study on the mechanism driving the spatial patterns of biological diversity along elevational gradients is a main focus in ecology, biogeography, and conservation biology.
Zijian Sun   +6 more
doaj   +1 more source

Tadpole-improved SU(2) lattice gauge theory [PDF]

open access: yes, 1998
A comprehensive analysis of tadpole-improved SU(2) lattice gauge theory is made. Simulations are done on isotropic and anisotropic lattices, with and without improvement. Two tadpole renormalization schemes are employed, one using average plaquettes, the
A. Patel   +31 more
core   +3 more sources

Analytic tadpole coefficients of one-loop integrals

open access: yesJournal of High Energy Physics, 2021
One remaining problem of unitarity cut method for one-loop integral reduction is that tadpole coefficients can not be straightforward obtained through this way. In this paper, we reconsider the problem by applying differential operators over an auxiliary
Bo Feng, Tingfei Li, Xiaodi Li
doaj   +1 more source

Does a Moderately Warming Climate Compensate for the Negative Effects of UV-B Radiation on Amphibians at High Altitudes? A Test of Rana kukunoris Living on the Qinghai–Tibetan Plateau

open access: yesBiology, 2022
Both the warming climate and ultraviolet-B radiation (UVBR) are considered to be notable environmental factors affecting amphibian population decline, with particular effects on tadpole development.
Xiaolong Tang   +7 more
doaj   +1 more source

Tadpoles and gauge symmetries

open access: yesJournal of High Energy Physics, 2023
The tadpole conjecture proposes that complex structure moduli stabilisation by fluxes that have low tadpole charge can be realised only at special points in moduli space, leading generically to (large) gauge symmetries.
Andreas P. Braun   +4 more
doaj   +1 more source

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