Solenoid
A solenoid (from the French solénoïde, derived in turn from the Greek solen "pipe, channel" + combining form of Greek eidos "form, shape") is a coil wound into a tightly packed helix. The term was invented by French physicist André-Marie Ampère to designate a helical coil.
In physics, the term refers to a coil whose length is substantially greater than its diameter, often wrapped around a metallic core, which produces a uniform magnetic field in a volume of space (where some experiment might be carried out) when an electric current is passed through it. A solenoid is a type of electromagnet when the purpose is to generate a controlled magnetic field. If the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet. Not all electromagnets and inductors are solenoids; for example, the first electromagnet, invented in 1824, had a horseshoe rather than a cylindrical solenoid shape.
Solenoid (disambiguation)
A solenoid may refer to
- a starter solenoid, part of an automobile ignition system; also called a starter relay
- automotive transmission solenoids
Solenoid (DNA)
The solenoid defines the packing of DNA as a 30 nm fiber of chromatin and results from the helical winding of at least five nucleosome strands.
In eukaryotic cells, 146 bp of DNA are wrapped approximately 1.65 times around a histone octamer (each histone consists of 2 H2A, H2B dimers, and H3, H4 tetramer) which together are called a nucleosome. Histone H1, which is not part of the binding histones, tightens the DNA bound to the eight protein complex. The nucleosomes, which at this point resemble beads on a string, are further compacted into a helical shape via the NH2 terminal protein interactions of the octameric histones, called a solenoid.
DNA packed into solenoids, unlike DNA in nucleosome form, is not transcriptionally active. With more packing, solenoids are able to become increasingly more packed, forming chromosomes. At this point, solenoids coil around each other to form a loop (anywhere from 20 to 80,000 base pairs), followed by a rosette (consisting of six connected loops), then a coil, and at last, two chromatids. The end result is the metaphase chromosome. The completely condensed chromatin has a diameter of up to 700 nm.
Podcasts:
Solenoid
ALBUMS
- Supernature released: 2006
- Services Rendered released: 2001
- Reverse Sender released: 2001
-
by Slint
-
by Slint
-
by Slint
-
by Slint
-
by Slint
-
by Slint
-
by Slint
-
by Xilent
-
by Xilent
Washer
by: SlintGoodnight my love
Remember me as you fall to sleep
Fill your pockets with the dust and the memories
That rises from the shoes on my feet
I won't be back here
Though we may meet again
I know it's dark outside
Don't be afraid
Everytime I ever cried from fear
Was just a mistake that I made
Wash yourself in your tears
And build your church
On the strength of your faith
Please
Listen to me
Don't let go
Don't let this desperate moonlight leave me
With your empty pillow
Promise me the sun will rise again
I too am tired now
Embracing thoughts of tonight's dreamless sleep
My head is empty
My toes are warm
Latest News for: solenoid
Last delivery of central solenoid structure arrives at ITER (Oak Ridge National Laboratory)
- 1