We establish that if F is a countable field of characteristic p, U is a unitary action of F` on a Hilbert space H , and P is an essential idempotent ultrafilter on F then for every polynomial r : F → F` with r(0) = 0 one has P-limg Ur(g)f = Prf weakly, where Pr is the projection onto the closed subspace Kr = { f ∈ H : {Ur(g)f}g∈F is precompact in the strong topology } . We then derive combinato...

Programmed -1 ribosomal frameshifting (-1 PRF) is a widely used translational mechanism facilitating the expression of two polypeptides from a single mRNA. Commonly, the ribosome interacts with an mRNA secondary structure that promotes -1 frameshifting on a homopolymeric slippery sequence. Recently, we described an unusual -2 frameshifting (-2 PRF) signal directing efficient expression of a tra...

Title of Document: mRNA SUICIDE: DESTABILIZATION BY PROGRAMMED RIBOSOMAL FRAMESHIFTING Jonathan L. Jacobs, Ph.D., 2006 Directed By: Associate Professor Jonathan D. Dinman, Department of Cell Biology & Molecular Biology Cis-acting mRNA elements that promote programmed -1 ribosomal frameshifting (-1 PRF) redirect a fraction of translating ribosomes into a new translational reading frame. In virus...

In recent years the use of pulsed radiofrequency (PRF) to treat chronic pain conditions has generated intense interest in the pain community. PRF is a minimally invasive, target-selective technique that has reported anecdotal benefit at reducing post-amputation stump pain (1), chronic radicular/ganglion pain (2), neuropathic pain (3), and arthropathic pain (4). There is no published data on usi...

Several studies demonstrate that visual stimulus motion affects neural receptive fields and fMRI response amplitudes. Here we unite results of these two approaches and extend them by examining the effects of visual motion on neural position preferences throughout the hierarchy of human visual field maps. We measured population receptive field (pRF) properties using high-field fMRI (7T), charact...

BACKGROUND AND OBJECTIVES Autologous platelet-rich fibrin (PRF(®)) is prepared by the automatic Vivostat(®) system. Conflicting results with Vivostat PRF in acute wound healing prompted us to examine its cellular and biomolecular composition. Specifically, platelets, selected growth factors and matrix metalloproteinase (MMP)-9 were quantified using novel analytical methods. MATERIALS AND METH...

BACKGROUND The purpose of this study was to create biomaterial scaffolds like platelet-rich plasma (PRP) and platelet-rich fibrin (PRF) containing stromal cell-derived factor-1 (SDF1) as a chemokine to induce hyaline cartilage regeneration of rabbit knee in a full thickness defect. METHODS We created a full thickness defect in the trochlear groove of thirty-six bilateral knees of eighteen mat...

conclusions both tens and prf lumbar sympathectomy are promising pain relief treatments for painful dnp. however, prf lumbar sympathectomy seems to have a superior efficacy. further studies with a larger sample size and a longer follow-up period are needed. background painful diabetic peripheral neuropathy (dpn) is a long-term complication of type 1 and type 2 diabetes that majorly impacts qual...

BACKGROUND Opioids disrupt sleep and adenosine promotes sleep, but no studies have characterized the effects of opioids on adenosine levels in brain regions known to regulate states of arousal. Delivering opioids to the pontine reticular formation (PRF) and substantia innominata (SI) region of the basal forebrain disrupts sleep. In contrast, administering adenosine agonists to the PRF or SI inc...

The intermediate lobe (IL) of the pituitary produces a PRL-regulating factor (PRF). Targeted tumorigenesis, using the POMC promoter ligated to SV40 large T antigen (Tag), generated transgenic mice that develop IL tumors with PRF activity. Our goal was to establish and characterize a PRF-producing cell line. Two cell lines, which differ markedly in size and morphology, were independently develop...