light

04/07/2014 - 08:09

Motor neuron disease or central nervous system injury can lead to loss of essential voluntary muscle activity such as speaking, walking, breathing, and swallowing due to defects in motor neurons. A new study published on 4th April in the journal Science describes a method for bypassing the defective central motor circuit using engrafted, light-activated motor neurons. The study in mice was led by researchers in University College London (UCL) and King’s College London and offers hope for treatment of paralysis and breathing difficulties in these devastating conditions.

 

04/01/2014 - 09:33

Scientists now present a protein that facilitates the control of nerve cells by light. It might be used as a basis of studies of diseases of the nervous system. The ChlocC channelrhodopsin presented now reacts about 10,000 times more sensitively to light than other proteins used so far for switching off nerve cells.

 

03/27/2014 - 14:36

Light waves can be defined by three fundamental characteristics: their color (or wavelength), polarization, and direction. While it has long been possible to selectively filter light according to its color or polarization, selectivity based on the direction of propagation has remained elusive.

 

03/10/2014 - 10:18

A team of MIT researchers has used a novel material that’s just a few atoms thick to create devices that can harness or emit light. This proof-of-concept could lead to ultrathin, lightweight, and flexible photovoltaic cells, light emitting diodes (LEDs), and other optoelectronic devices, they say.

 

01/23/2014 - 12:55

Flexible, layered materials textured with nanoscale wrinkles could provide a new way of controlling the wavelengths and distribution of waves, whether of sound or light. The new method, developed by researchers at MIT, could eventually find applications from nondestructive testing of materials to sound suppression, and could also provide new insights into soft biological systems and possibly lead to new diagnostic tools.

12/09/2013 - 09:51

A massive impact on the Moon about 4 billion years ago left a 2,500-mile crater, among the largest known craters in the solar system. Smaller subsequent impacts left craters within that crater. Comparing the spectra of light reflected from the peaks of those craters may yield clues to the composition of the Moon’s lower crust and mantle — and would have implications for models of how the Moon formed.