The intracellular movement of cell surface transferrin receptor (TfR) after internalization was studied in K562 cultured human erythroleukemia cells. The sialic acid residues of the TfR glycoprotein were used to monitor transport to the Golgi complex, the site of sialyltransferases. Surface-labeled cells were treated with neuraminidase, and readdition of sialic acid residues, monitored by isoel...

We for the first time investigated the effect and mechanism of the total flavones of Rhododendron simsii Planch (TFR), a widely-used Chinese herb for a thousand years, on vasodilatation and hyperpolarization in middle cerebral artery (MCA) of rats subject to global cerebral ischemia-reperfusion (CIR). TFR (11~2700 mg/L) evoked dose-dependent vasodilation and hyperpolarization in MCA of both sha...

We investigate the amount of scatter in the Tully-Fisher relation (TFR) when using optical long-slit Hα rotation curves to determine the velocity widths of spiral galaxies. We study a sample of 25 galaxies in the Coma region of the sky which were shown in Bernstein et al. (1994) to exhibit an extraordinarily low scatter of 0.10 mag RMS in the I magnitude vs 21-cm width TFR. Using the same I mag...

spectral decomposition or time-frequency representation (tfr) is a powerful tool for analyzing time varying nature of seismic data. mapping of a one dimensional seismic time trace to a two dimensional function of time and frequency reveals some characteristics of seismic signals that are not available in only time or frequency representations. this approach has been widely used in seismic explo...

A time–frequency representation can highlight non-stationarities in a signal. We propose to extract subsets from the time– frequency representation (TFR) for classi3cation or recognition purposes. We developed two approaches. The 3rst one is developed for TFRs obtained from the short time Fourier transform or the gliding minimum variance method. The extraction of compact subsets is viewed as a ...

Indexing of visual media based on content analysis has now moved beyond using individual concept detectors and there is now a focus on combining concepts or post-processing the outputs of individual concept detection. Due to the limitations and availability of training corpora which are usually sparsely and imprecisely labeled, training-based refinement methods for semantic indexing of visual m...

Hereditary hemochromatosis (HH) is a common autosomal recessive disorder characterized by excess absorption of dietary iron and progressive iron deposition in several tissues, particularly liver. Liver disease resulting from iron toxicity is the major cause of death in HH. Hepatic iron loading in HH is progressive despite down-regulation of the classical transferrin receptor (TfR). Recently a h...

The purpose of this study was to investigate the usefulness of soluble serum transferrin receptor (TfR) concentration, TfR index and log TfR:ferritin ratio (TfR outcomes) in detecting tissue Fe deficiency among breast-feeding Otomi women residing in Capulhuac, Mexico (2800 m above sea level) and to determine whether folate deficiency modifies the interpretation of these data. Lactating women (n...

Intravenous ascorbic acid (IVAA) medication has been shown to facilitate iron release from inert depots and subsequently circumvent the defective iron utilization in chronic hemodialysis (HD) patients who are treated with recombinant human erythropoietin (rHuEPO). This study focuses on the effects of IVAA supplementation on serum concentrations of soluble transferrin receptors (TfR) on the basi...

Development of robust and efficient front-end is crucial for robust ASR. Proper time and frequency resolution of the TFR of speech, motivated by the auditory models is considered an important factor for robustness. An efficient method of realizing a variable resolution TFR using DTFT/Goertzel algorithm is proposed instead of the standard FFT based approach. It is shown that the new representati...