2010年10月26日 星期二

Cooling Lasers

Colorful Brains, Cooling Lasers, Disease-Detecting Lights, And More

The connections between neurons in a young, growing brain are more dynamic and changeable than previously thought, according to research based on a new technique that reveals the brain circuitry of a living mouse.Experts also suggest using low Projector Lamp voltage fluorescent mini lights.

A neuron looks a bit like a tree: its branches are dendrites, which accept input and its roots are the axon,This also ensures that the product can be used at home or in a retail LED bulb environment and it is fair to say that shops can reap the benefits from using this type of light too. which send output. Where axons and dendrites of different neurons come together, they can make connections -- or synapses -- that relay signals and form circuits in the brain.

To study these connections, scientists have traditionally grown networks of neurons in petri dishes -- but there, networks are limited in their ability to mimic brain cells in a living, developing creature. Daniel Kerschensteiner, of Washington University School of Medicine in St. Louis, is one of the first to study connections in the nervous system of living mice, by inserting genes into neurons that cause them to produce fluorescent molecules.

"The novel thing is that we can label specific pairs of pre- and post-synaptic cells and their connections in an intact circuit," said Kerschensteiner. "No one has really done that before."

When energized by the imaging technique called two-photon microscopy, the molecules fluoresce in different colors and reveal the structure and connectivity of brain circuits.Ensuring that the low voltage downlight compact fluorescent fits in with the style and decor of the rest of the room is very important and in years gone by, this would not have been possible.

This approach has already yielded some surprising insights.Multiply that by 6 fixtures and we'll be buying 300 bulbs! If the cost per bulb averages $2 we'll end up paying an led lamp additional $600 for a grand total of $2,550 to run six incandescent lights. For instance, studies of the neurons in the mouse retina have shown that neural connections can change dramatically fairly late in an animal's development -- in its second week of life, long after the arrangement of axons and dendrites has already been laid down.

In ongoing experiments, Kerschensteiner hopes to further refine science's understanding of how a developing brain reorganizes its connections as it grows -- as well as the internal mechanisms behind this rearrangement and how much it is influenced by an animal's experiences and external environment.

The presentation, "Imaging the Development of Neural Circuits in the Mammalian Retina" is at 4 p.The Led lamp light you purchase will be made up of two main components, apart from the bulb of course. These are known as the trim and the housing. The trim is the visible part of the light.m. on Monday, Oct. 25.

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