We report spectra obtained with the Spitzer Space Telescope in the λ = 5 – 35 μm range of HD 233517, an evolved K2 III giant with circumstellar dust. For λ > 13 μm, the flux is a smooth continuum that varies approximately as ν. For λ < 13 μm, although the star is oxygen-rich, PAH features produced by carbon-rich species at 6.3 μm, 8.2 μm, 11.3 μm and 12.7 μm are detected along with likely broad...

We report the use of an all-solid-state ultrashort pulsed source specifically for two-photon microscopy at wavelengths shorter than those of the conventional Ti:Sapphire laser. Our approach involves sum-frequency mixing of the output from an optical parametric oscillator (λ= 1400-1640 nm) synchronously pumped by a Yb-doped fibre laser (λ= 1064 nm), with the residual pump radiation. This generat...

We report spectra obtained with the Spitzer Space Telescope in the λ = 5 – 35 μm range of HD 233517, an evolved K2 III giant with circumstellar dust. For λ > 13 μm, the flux is a smooth continuum that varies approximately as ν. For λ < 13 μm, although the star is oxygen-rich, PAH features produced by carbon-rich species at 6.3 μm, 8.2 μm, 11.3 μm and 12.7 μm are detected along with likely broad...

A pyrene-fused pyrazaacene with only four linearly-fused aromatic rings is reported, which remarkably shows emission at red to NIR wavelengths (λ(em) = 687 nm). This exceeds the emission wavelengths observed for azaacenes with the same number of linearly-fused rings.

Common lymphoid progenitors (CLPs) are the first bone marrow precursors in which V(D)J recombinase activity is up-regulated. Here, we show that loss of the transcription factor E47 produces a reduced CLP population that lacks V(D)J recombinase activity and D-J H rearrangements in vivo. Apart from a profound arrest before the pro–B cell stage, other downstream lymphoid progeny of CLPs are still ...

The behavior of a pyridinium-substituted dimethyldihydropyrene photo-switch under aerobic conditions was investigated. During irradiation with red light (λ ≥ 630 nm), this compound plays the role of oxygen sensitizer and is quantitatively converted into an endoperoxide derivative. The photo-produced endoperoxide then thermally releases singlet oxygen to regenerate the starting compound.

PURPOSE The study evaluated-theoretically and experimentally-the longitudinal chromatic aberration (LCA) and through-focus energy efficiency (TF-EE) of diffractive-refractive bifocal intraocular lenses (2f-IOLs). METHODS Four aspheric 2f-IOLs (Tecnis +4.00 diopter [D] ZMA00, +2.75 D ZKB00, and AcrySof +4.0 D SN6AD3, +2.5 D SV25T0) of same base power 30 D, but different design, additional (add...

A bifunctional peptide containing a domain that targets cell nuclei and a domain with the ability to biomineralize and capture Au clusters is presented. The peptide-Au clusters exhibit red emission (λ(em) = 677 nm) and specifically stain the nuclei of three cell lines.

Common lymphoid progenitors (CLPs) are the first bone marrow precursors in which V(D)J recombinase activity is up-regulated. Here, we show that loss of the transcription factor E47 produces a reduced CLP population that lacks V(D)J recombinase activity and D-J(H) rearrangements in vivo. Apart from a profound arrest before the pro-B cell stage, other downstream lymphoid progeny of CLPs are still...