Er(3+) doped oxyfluoride tellurite glasses have been prepared. Three Judd-Ofelt parameters Ωt (t=2, 4, 6) and radiative properties are calculated for prepared glasses. Emission characteristics are analyzed and it is found that prepared glasses possess larger calculated predicted spontaneous transition probability (39.97 s(-1)), emission cross section σem (10.18 × 10(-21)cm(2)) and σem × Δλeff (...

Lanthanide-doped upconverting nanoparticles (UCNPs, NaYF4:Yb(3+),Er(3+)) are well known for emitting visible photons upon absorption of two or more near-infrared (NIR) photons through energy transfer from the sensitizer (Yb(3+)) to the activator (Er(3+)). Of the visible emission bands (two green and one red band), it has been suggested that the red emission results from two competing upconversi...

The structures of five polyiodide salts, [Co([9]aneS3)2]I11 (1), [Ni([9]aneS3)2]I6 (2), [Ni([9]aneS3)2]I10 (3), [Pd([12]aneS4)]I6 (4) and [Pd([14]aneS4)]I10.MeCN (5), containing the template cations [Co([9]aneS3)2]3+, [Ni([9]aneS3)2]2+, [Pd([12]aneS4)]2+ and [Pd([14]aneS4)]2+ ([9]aneS3=1,4,7-trithiacyclononane, [12]aneS4=1,4,7,10-tetrathiacyclododecane, [14]aneS4=1,4,8,11-tetrathiacyclotetradec...

Rat lysosomal glycoprotein 120 (lgp120; lamp-I) is a transmembrane protein that is directly delivered from the trans-Golgi network (TGN) to the endosomal/lysosomal system without prior appearance on the cell surface. Its short cytosolic domain of 11 residues encodes determinants for direct lysosomal sorting, endocytosis and, in polarized cells, basolateral targeting. We now characterize the str...

A new series of fluorophosphates glass is developed which can be doped with an extremely high concentration of Nd. The dopant concentration dependence of optical absorption and emission properties is reported here for the concentration range of 2.5x10 to 1.25x10 (ions/cm). Absorption and emission measurements are performed in order to evaluate the spontaneous emission probability, absorption cr...

1 . Thin-layer chromatography of porphyrin methyl esters provides a useful and rapid technique for resolving mixtures of porphyrins from biological samples. 2. Application of this technique to urinary, faecal and hepatic porphyrins from patients with symptomatic porphyria revealed five porphyrins of interest which could be identified by mass spectrometry as the methyl esters of porphyrins with ...

In a 2002 telephone survey of 16,435 randomly selected U.S. residents, respondents answered several questions about their beliefs concerning sources of gastrointestinal illness. Of those who had experienced vomiting or diarrhea in the month before their telephone interview, 22% believed the source of their gastrointestinal illness was a meal eaten outside the home. I11 respondents who had diarr...

Er(3+) activated germanate glasses modified by La2O3 and Y2O3 with good thermal stability were prepared. 2.7 μm fluorescence was observed and corresponding radiative properties were investigated. A detailed discussion of J-O parameters has been carried out based on absorption spectra and Judd-Ofelt theory. The peak emission cross sections of La2O3 and Y2O3 modified germanate glass are (14.3 ± 0...

A series of β-NaLuF4 crystals were synthesized via a hydrothermal method. Hexagonal phase microdisks, microprisms, and microtubes were achieved by simply changing the amount of citric acid in the initial reaction solution. Pure red upconversion (UC) luminescence can be observed in β-NaLuF4:Yb(3+), Tm(3+), Er(3+) and Li(+) doped β-NaLuF4:20% Yb(3+), 1% Tm(3+), 20% Er(3+). Based on the rate equat...