Sentences with phrase «shaped nucleus»

An international team of physicists has found the first direct evidence of pear shaped nuclei in exotic atoms.

«It produces the matter / antimatter asymmetry in the early universe and it aligns the direction of the spin and the charge axis in these pear - shaped nuclei.»

Not exact matches

Nucleus pulposus can degenerate with age, causing the discs to lose their shape and collapse — resulting in pain, among other problems.

If Comet ISON comes out the other side, Meech, Li, A'Hearn and countless others around the world will resume their vigil, looking for changes in the shape and composition of the nucleus.

Around the same time, Schwartz suggested the team investigate the caudate nucleus, a tail - shaped structure near the OFC that serves as the habit center of the brain.

Though their nuclei are still separated by a large distance, the shapes of the galaxies in Arp 256 are impressively distorted.

For the first time, they managed to control the shape of the laser pulse to keep an electron both free and bound to its nucleus, and were at the same time able to regulate the electronic structure of this atom dressed by the laser.

Searching for answers, Shatz decided to focus on the lateral geniculate nucleus (LGN), a clump of tissue shaped like a piece of elbow macaroni, set behind each eyeball, that serves as a relay station shunting visual signals to the ocular dominance columns.

The possibility of experimentally searching for relatively stable states with deformed shapes in the Ni - 66 nucleus has, however, only emerged recently.

Now, it turns out that the nuclei of much lighter elements, such as nickel, can also persist a little longer in their new shape.

«The extension of life span measured by us of the deformed shape of the Ni - 66 nucleus is not as spectacular as that of the actinides, where it reached tens of millions of times.

With properly selected collision energies, a small portion of the Ni - 66 nuclei thus formed achieve a certain state with a deformed shape which, as measurements showed, proved to be slightly more stable than all other excited states associated with significant deformation.

During the collisions, both the excess neutrons can be transferred to the nickel nuclei, resulting in the creation of nickel - 66, the basic shape of which is almost an ideal sphere.

Just like a ball returns to its original shape after the hand that has distorted it is removed, so the nucleus returns to its original form, but it does so much, much faster, in billionths of a billionth of a second or an even shorter time.

But within the coral trout's lesions, cells looked abnormal with nuclei that varied dramatically in size and shape.

«When an atomic nucleus is supplied with the right amount of energy, it can transition into a state with a different shape deformation than is typical for the basic state.

When the nucleus is excited, its shape may change, but only for an extremely brief moment, after which it returns to its original state.

In an experiment performed at the Romanian accelerator centre IFIN - HH, an international team of physicists observed a «second face» of the nickel - 66 nuclei: a relatively stable excited state in which the shape of nucleus is changed.

They may be made of a jumble of «nuclear pasta» — nuclei in the dense crust that are forced into exotic shapes like spaghetti and macaroni.

This dual movement makes it possible for the atomic nucleus to spontaneously deform into a cigar - like shape, for instance.

Related sites Rosetta mission Hubble Space Telescope study of comet, with derived nucleus shape Stardust mission

The researchers mapped the surface of the 4.8 - kilometer - wide comet nucleus, whose oblate shape resembles a homemade hamburger patty.

«When you watch the shapes of the cells, it looks like even the cell nuclei are deformed.»

In effect the negatively charged electrons and positively charged atomic nuclei respond to one another in a way that causes each to try to accommodate the «shape» of the other.

But fusion is no easy matter: The nuclei must be heated to 100 million degrees, and the resulting ionized gas, or plasma, held in place with huge and powerful superconducting electromagnets to prevent it from touching the sides of the vessel, a doughnut - shaped steel enclosure called a tokamak.

With no nucleus to further modify and craft gene expression and protein translation, life thrived but literally could not get hold of itself, could not assume new shapes or diversify.

They possess a suite of features lacking in their simpler brethren: a nucleus that houses DNA; an energy - producing device known as the mitochondrion; and molecular architecture, known as the cytoskeleton, that controls cell shape and movement.

The theory is that electrified, umbrella - shaped towers can send negatively charged particles into the air, increasing the chance that supercooled droplets will collide with freezing nuclei, thus becoming rain.

From that perch, high above the bulk of Earth's atmosphere, the box - shaped instrument was pelted by heavy atomic nuclei from deep space, leaving bread - crumb trails of light in its three sets of detectors.

Additional micro-patterning of the substrate changes the cytoskeleton in the cell and the shape of the nucleus, which cause the genes in the cell to change.

Lin observed that this change in nucleus shape is similar to what occurs during cell division and hypothesized that there may be similar underlying mechanisms behind cell division and regeneration.

Wüthrich found a way to determine the precise shape of a very large biomolecule by studying how its hydrogen nuclei wobble when exposed to carefully tuned magnetic fields — a phenomenon known as nuclear magnetic resonance, or NMR.

In the second phase, the cell's nucleus, containing its DNA, changes shape.

Many active galactic nuclei are surrounded by large, dark, donut - shaped clouds of gas and dust, as seen in this artist's rendering.

Researchers at NYU Langone Medical Center say they have added to evidence that a shell - shaped region in the center of the mammalian brain, known as the thalamic reticular nucleus or TRN, is likely responsible for the ability to routinely and seamlessly multitask.

Whether it's stuffing DNA inside the nucleus or cramming energy - generating machinery into the rod - shape organelles called mitochondria, biology separates tasks into specialized compartments within cells to make it easier to do specific jobs without interference.

To determine the shape of the nuclei, the researchers produced beams of exotic — short - lived — radium and radon atoms at CERN's Isotope Separator facility ISOLDE.

The shape of the nucleus could give clues to why the universe contains more matter than antimatter.

This object had an almost circular shape, and a light beam came out from its eastern part that crossed the sunspot to the south of the nucleus, producing a shadow on the penumbra that was lost in the large mass of faculae surrounding the eastern extreme of the sunspot.»

On the sub-atomic level, the team found that the process is greatly affected by the shape of the reacting nuclei.

This visualization shows tightly - packed DNA in a mouse cell's nucleus at different stages of development, seen here in a semi-triangular form as a mature nerve cell; in a roundish shape as a multipotent stem cell; in a more oval form as a neuronal progenitor; and as a more fragmented structure that shows how removing a specialized binding protein (HP1β knockout) affects the structure of the DNA - packing material, called heterochromatin, in a mature neuron.

The charged nuclei and electrons that zip around the vacuum vessels of doughnut - shaped fusion machines known as tokamaks are always in motion.

This 1.25 - mile - or 2 - kilometer - long, «peanut - shaped» comet nucleus was the fifth visited by Human spacecraft, which in this case was NASA's re-purposed Deep Impact probe.

They found that the actin mesh in the nucleus is softer than jello, but like jello, with some prodding it returns to its original shape.

Steinman and Cohen noted in their seminal 1973 paper in the Journal of Experimental Medicine: «The nucleus is large, retractile, contorted in shape, and contains small nucleoli (usually two).

«Separately, over two - thirds of comet nuclei that have been imaged at high resolution show bilobate shapes, including the nucleus of comet 67P / Churyumov - Gerasimenko (67P), visited by the Rosetta spacecraft.

To fit inside the tiny nucleus of a cell, strands of DNA wrap around histones, which are spool - shaped proteins.

Red blood cells are recycled here; platelets (a small colorless disk - shaped cell fragment without a nucleus, found in large numbers in blood and involved in clotting) and white blood cells (less technical term for leukocyte which include lymphocytes, granulocytes, monocytes, and macrophages) are stored in the spleen.

Schools are the nuclei of local communities and the preparatory grounds where future leaders are educated and shaped to inform and engage in our democracy.

In his Spatial Reliefs, Nuclei and Penetrables, made during the early - 60s, he strove to liberate the abstract coloured shapes from the wall and from adherence to a particular form by making them part of the viewer's environment.