![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
consubstantiation
Dec. 19th, 2002 12:30 ambread is the breadth of breath
Dec. 19th, 2002
literal windows into the brain
Dec. 19th, 2002 12:36 amScientists Study Brain Changes Over Time
Scientists have found a way to track tiny features of individual brain cells in living mice, providing a glimpse at how brains change over time. In one case, they watched the animals' brains rewire after their whiskers were clipped.
The technique will help scientists explore how the brain forms memories and reacts physically to its owner's experiences.
Brain cells called neurons signal each other across tiny gaps, called synapses. The signals are received by tiny spines. Researchers in both studies followed the growth and destruction of the spines over time.
The researchers tracked the spines, which measure less than one twentieth the width of a human hair, using specially bred mice that carry a gene which makes some of their neurons glow. They used laser and electron microscopes to peek through windows implanted in the mouse skulls, or through skull bones thinned with a drill.
In one study, the researchers clipped the highly sensitive whiskers of mice and watched changes in the part of the brain that receives signals from the whiskers. Two to four days after clipping, the number of spines created or lost in that area increased significantly, indicating new synapses were being created and others destroyed, the researchers reported.
Scientists have found a way to track tiny features of individual brain cells in living mice, providing a glimpse at how brains change over time. In one case, they watched the animals' brains rewire after their whiskers were clipped.
The technique will help scientists explore how the brain forms memories and reacts physically to its owner's experiences.
Brain cells called neurons signal each other across tiny gaps, called synapses. The signals are received by tiny spines. Researchers in both studies followed the growth and destruction of the spines over time.
The researchers tracked the spines, which measure less than one twentieth the width of a human hair, using specially bred mice that carry a gene which makes some of their neurons glow. They used laser and electron microscopes to peek through windows implanted in the mouse skulls, or through skull bones thinned with a drill.
In one study, the researchers clipped the highly sensitive whiskers of mice and watched changes in the part of the brain that receives signals from the whiskers. Two to four days after clipping, the number of spines created or lost in that area increased significantly, indicating new synapses were being created and others destroyed, the researchers reported.
This is bad.
Dec. 19th, 2002 01:47 amI saw a link to The Poetry Free-for-all, so I went, and I found a bustling poetry community that actually gives constructive criticism. I spend most of my online time here; now I see a large chunk of that time going to this other.... *sigh* I do have an internet addiction.
star analogy
Dec. 19th, 2002 08:55 pmWisdom is breath; Word is sound
pronounced with breath. Sophia is
the primordial silence; Logos is silence
spoken with breath.
pronounced with breath. Sophia is
the primordial silence; Logos is silence
spoken with breath.
prismatic prana (revision #1)
Dec. 19th, 2002 09:04 pmchronomous loveknot
arcking over every iota
yon clairvoyant arkman reckoned
a covenant between we and Thee:
the jet of Your breath
luminescing into lucidity--
scrim across the sky
arcking over every iota
yon clairvoyant arkman reckoned
a covenant between we and Thee:
the jet of Your breath
luminescing into lucidity--
scrim across the sky
Strange energy
Dec. 19th, 2002 09:50 pmMystery Energy Source Detected in Space
A mysterious cloud of high-energy electrons envelopes a young cluster of stars in our Milky Way Galaxy, astronomers announced Monday.
The cluster involves thousands of stars, all less than a million years old, packed into a region of space about 5 light-years across, with more stars probably forming as you read this. Such cramped parts of space are thought to be conducive to the production of hot gas, but not high-energy particles, astronomers said.
The particles, instead, are typically produced by exploding stars, or in the strong magnetic fields around neutron stars or black holes. There is no evidence for any of the above in this cluster, called RCW 38.
[...] "The RCW 38 observation doesn't agree with the conventional picture," said Scott Wolk of the Harvard-Smithsonian Center for Astrophysics in Cambridge, MA, lead author of an Astrophysical Journal Letters paper that described the findings earlier this month. "The data show that somehow extremely high-energy electrons are being produced there, although it is not clear how."
Electrons accelerated to energies of trillions of volts are required to account for the observed X-ray spectrum of the gas cloud surrounding the ensemble of stars, according to a statement issued with the findings.
A mysterious cloud of high-energy electrons envelopes a young cluster of stars in our Milky Way Galaxy, astronomers announced Monday.
The cluster involves thousands of stars, all less than a million years old, packed into a region of space about 5 light-years across, with more stars probably forming as you read this. Such cramped parts of space are thought to be conducive to the production of hot gas, but not high-energy particles, astronomers said.
The particles, instead, are typically produced by exploding stars, or in the strong magnetic fields around neutron stars or black holes. There is no evidence for any of the above in this cluster, called RCW 38.
[...] "The RCW 38 observation doesn't agree with the conventional picture," said Scott Wolk of the Harvard-Smithsonian Center for Astrophysics in Cambridge, MA, lead author of an Astrophysical Journal Letters paper that described the findings earlier this month. "The data show that somehow extremely high-energy electrons are being produced there, although it is not clear how."
Electrons accelerated to energies of trillions of volts are required to account for the observed X-ray spectrum of the gas cloud surrounding the ensemble of stars, according to a statement issued with the findings.