The Gamma-Ray Large Area Space Telescope (GLAST), to be launched in the fall of 2007, will measure the spectra of distant extragalactic sources of high energy γ-rays, particularly active galactic nuclei and γ-ray bursts. GLAST can look for energy-dependent γ-ray propagation effects from such sources as a signal of Lorentz invariance violation. These sources should also exhibit the high energy c...

With the goal of providing an additional tool for controlling bovine brucellosis in Brazil and evaluating the full calf dose in adult cattle, the efficacy of the rough Brucella abortus strain RB51 vaccine was tested in heifers. Thirty-three females of approximately 24 months of age were divided in two groups: one group (n=20) received the RB51 vaccine and the other group (n=13) were used as non...

London theory was developed by Fritz London in 1935 to describe the Meissner effect. This theory leads to the introduction of the penetration depth to describe the extent of magnetic field penetration, λ into type I superconductors. The penetration depth is also important in type II superconductors and describes the extent of flux penetration near vortices as well as at surfaces. Prior to his s...

It is well known that the simple theory of helicon waves, in which the electron mass me is neglected, is valid only if Ez also vanishes, a condition which is not satisfied in experiment. Exact solutions of cold plasma theory with finite me and Ez predict the existence of additional highly damped Trivelpiece–Gould ~TG! modes ~H-TG theory!, which can greatly modify the nature of helicon discharge...

In addition to their critical roles in folliculogenesis and ovarian granulosa cell steroidogenesis, gonadotropins have been implicated as potential risk factors in ovarian epithelial carcinomas, most of which are derived from ovarian surface epithelium (OSE). However, the molecular mechanism underlying the effects of FSH and LH in OSE and its neoplastic counterpart is not well understood. We pr...