Light-Emitting-Diodes based on ordered InGaN nanocolumns emitting in the blue, green and yellow spectral range

The growth of ordered arrays of InGaN/GaN nanocolumnar light emitting diodes by molecular beam epitaxy, emitting in the blue (441 nm), green (502 nm), and yellow (568 nm) spectral range is reported. The device active region, consisting of a nanocolumnar InGaN section of nominally constant composition and 250 to 500 nm length, is free of extended defects, which is in strong contrast to InGaN layers (planar) of similar composition and thickness. The devices are driven under pulsed operation up to 1300 A/cm2 without traces of efficiency droop. Electroluminescence spectra show a very small blue shift with increasing current, (almost negligible in the yellow device) and line widths slightly broader than those of state-of-the-art InGaN quantum wells.

Infiltration of a photonic crystal fiber with cholesteric liquid crystal and blue phase

Photonic crystal fibers (PCF) have been selectively filled with a cholesteric liquid crystal (ChLC) with special interest in the blue phase (BP) of the liquid crystal. It has been observed thermal tuning of the guided light in the visible region. A dramatically enhance appears when the phase of the liquid crystal changes from cholesteric to blue phase I (BPI). When a thermal range of the blue phase I is achieved, no changes are observed while increasing temperature from BPI through BPII and to the isotropic phase.

Blue, white, red [ [Material gráfico]: V. Masip Urios Carcagente España.

Tit. en la etiqueta: "V. Masip Urios Carcagente España / Blue / White / Red"

H [ [Material gráfico]: first selection blue : brand : Valencia - Spain.

Tit. en la etiqueta: "First selection / blue / H / brand / Valencia - Spain"

An Evening with Tim Wise, an Anti-Racist Essayist, Author and Educator.

Wise, who began his career as Youth Coordinator and Associate Director of the Louisiana Coalition Against Racism and Nazism, now tours the country speaking to students on over 1,000 college and high school campuses. He also speaks to professional institutions on ways to remove racism from within their ranks. Wise's memoir White Like Me: Reflections on Race from a Privileged Son, is widely regarded for its depiction of how racism creates privilege for Whites, while negatively impacting persons of color. His five other works, including Dear White America: Letter to a New Minority, have also earned critical acclaimed. His seventh work Culture of Cruelty: How America's Elite Demonize the Poor, Valorize the Rich and Jeopardize the Future, is scheduled for release in early 2015.

Blue Tiger Leader February 2015 Issue

Blue Tiger Leader is published twice during each semester by the Lincoln University (MO) Army ROTC Blue Tiger Battalion.

Blue Tiger Commons: what it can do for you?

Presentation given to Faculty Senate on April 30, 2015.

Blue Tiger Leader April 2015 Issue

Blue Tiger Leader is published twice during each semester by the Lincoln University (MO) Army ROTC Blue Tiger Battalion.

Blue Tiger Commons Bookmarks

Bookmarks for Blue Tiger Commons

Blue Tiger Leader September 2015 Issue

Blue Tiger Leader is published twice during each semester by the Lincoln University (MO) Army ROTC Blue Tiger Battalion.

Stimulation of the blue light phototropic receptor NPH1 causes a transient increase in cytosolic Ca2+

Blue light regulates plant growth and development, and three photoreceptors, CRY1, CRY2, and NPH1, have been identified. The transduction pathways of these receptors are poorly understood. Transgenic plants containing aequorin have been used to dissect the involvement of these three receptors in the regulation of intracellular Ca2+. Pulses of blue light induce cytosolic Ca2+ transients lasting about 80 s in Arabidopsis and tobacco seedlings. Use of organelle-targeted aequorins shows that Ca2+ increases are limited to the cytoplasm. Blue light treatment of cry1, cry2, and nph1 mutants showed that NPH1, which regulates phototropism, is largely responsible for the Ca2+ transient. The spectral response of the Ca2+ transient is similar to that of phototropism, supporting NPH1 involvement. Furthermore, known interactions between red and blue light and between successive blue light pulses on phototropic sensitivity are mirrored in the blue light control of cytosolic Ca2+ in these seedlings. Our observations raise the possibility that physiological responses regulated by NPH1, such as phototropism, may be transduced through cytosolic Ca2+.