FDA's green light, science's red light

Generating green to red light with semiconductor lasers.

Diode lasers enable one to continuously cover the 730 to 1100 nm range as well as the 370 to 550 nm range by frequency doubling, but a large part of the electro-magnetic spectrum spanning from green to red remains accessible only through expensive and unpractical optically pumped dye lasers. Here we devise a method to multiply the frequency of optical waves by a factor 3/2 with a conversion tha...

Cancer cell migration: when red light switched to green.

T he doctrine of ‘the golden mean’ of the Confucian certainly applies at the molecular level to cell growth and migration. It is critically important for tissue architecture and homeostasis that cells stop proliferation when reaching appropriate density and halt migration in a direction to avoid collision with others. This ‘red light’ to hinder cell movement is essential for maintaining contact...

Red, Green, and Blue LEDs for White Light Illumination

The rapid improvement of the white light efficacy achievable with light-emitting diodes (LEDs) opens up new opportunities in the general illumination market. An LED light source made of red, green, and blue LEDs (RGB-LEDs) can provide the unique feature of color variability, allowing the user to select the desired color point of the lamp. The white light color accuracy required in the general i...

Effects of Oxygen and Red Light upon the Absorption of Visible Light in Green Plants.

D. C. Effect of 2,4-dichlorophenoxyacetic acid on respiration and on destruction of indoleacetic acid in oat and sunflower tissues. Science 120: 710-712. 1954. 9. HUMPHREYS, T. E. and DUGGER, W. M., JR. The effect of 2,4-dichlorophenoxyacetic acid on the respiration of etiolated pea seedlings. Plant Physiol. 31 Suppl.: xxii. 1956. 10. HUMPHREYS, T. E. and DUGGER, W. M., JR. The effect of 2,4-di...

Red Light, Green Light: Making Sense of the Organizational Context for Issue Selling