rRNA transcription is a fundamental requirement for all cellular growth processes and is activated by the phosphorylation of the upstream binding factor (UBF) in response to growth stimulation. Even though it is well known that phosphorylation of UBF is required for its activation and is a key step in activation of rRNA transcription, as yet, there has been no direct mapping of the UBF phosphor...

We explore the response of the He ii 304 Å and He i 584 Å line intensities to electron beam heating in solar flares using radiative hydrodynamic simulations. Comparing different electron beams parameters, we found that the intensities of both He lines are very sensitive to the energy flux deposited in the chromosphere, or more specifically to the heating rate, with He ii 304 Å being more sensit...

Dolly was the first cloned mammal and must be the most famous sheep in the world. Two things made her famous: first that she is an artificially induced clone, genetically identical to a previously existing sheep, for Dolly can be thought of as a vertical twin with identical genes, in this case to the parent. Second is the way in which it was done. The scientists took the nucleus from a cell fro...

AT&T's long distance prices are regulated in order to avoid supracompetitive pricing. This rationale presumes that AT&T possesses sufficient market power to raise prices substantially above marginal cost. This paper estimates firm specific demand elasticities for AT&T and the other large long distance companies using monthly data for 1988 through 1991 from five states. Lerner indices are calcul...

Dual-wavelength reflection-mode photoacoustic microscopy is used to noninvasively obtain three-dimensional (3-D) images of subcutaneous melanomas and their surrounding vasculature in nude mice in vivo. The absorption coefficients of blood and melanin-pigmented melanomas vary greatly relative to each other at these two optical wavelengths (764 and 584 nm). Using high-resolution and high-contrast...

The g factor is common to a wide set of cognitive abilities and it is usually considered the most important predictor of success both in academia and everyday life. The information provided by summary intelligence scores, such as IQ, may or may not involve the g factor. This must be explicitly tested. With this main purpose in mind here we analyzed the Italian standardization sample of the Wech...

I. Introduction 575 1. The decay K° — • TT + W~. Basic experimental results 575 2. Attempts to explain the decay Kjj —-K*W~ without violation of CP invariance 576 3. The purpose of this article 577 4. The hypothesis of CPT invariance 577 5. A new interaction 578 6. The a particles 579 7. Summary of processes 579 n. Neutral K mesons 581 8. Description of K° mesons 581 9. The decays K^ — w*ir~ an...