Many pathways and signals lead to apoptosis, but there is only one mechanism that actually causes the death of a cell.

Bistability can only arise in biological and chemical systems if three necessary conditions are fulfilled: positive feedback, a mechanism to filter out small stimuli and a mechanism to prevent explosions.

In the S < sub > N </ sub > 2 mechanism, the nucleophile forms a transition state with the attacked molecule, and only then the leaving group is cleaved.

This implies that processor registers normally are not considered as memory, since they only store one word and do not include an addressing mechanism.

It has been stated by some researchers that the recruitment and recovery of neurons in the left hemisphere opposed to the recruitment of similar neurons in the right hemisphere is superior for long-term recovery and continued rehabilitation .< ref name =' Heiss '> It is thought that, because the right hemisphere is not intended for full language function, using the right hemisphere as a mechanism of recovery is effectively a " dead-end " and can lead only to partial recovery.

Japanese fascist Nakano Seigo advocated that Japan follow the Italian and German models, which were " a form of more democratic government going beyond democracy " which itself had " lost its spirit and decayed into a mechanism which insists only on numerical superiority without considering the essence of human beings.

This argument, first proposed by Max Weber, says that the efficient exchange and use of resources can be maintained only through the price mechanism in free markets ( see economic calculation problem ).

Eventually, the " rapid " firing mechanism was perfected and miniaturized to the extent that either the recoil of the firearm or the gas pressure from firing could be used to operate it, thus the operator needed only to pull a trigger ( which made the firing mechanisms truly " automatic ").

In addition, such harpsichords often have a mechanism to couple manuals together, so that two can be used while actually playing on only one.

A side pocket is a mechanism whereby the fund segregates the illiquid assets from the main portfolio of the fund and issues investors with a new class of interests or shares which participate only in the assets in the side pocket.

These machines are mechanically similar since all three types use a handle connected to a flywheel by rope, chain, or strap to provide resistance to the user – the types differ only in braking mechanism.

Shared memory is strictly speaking also an inter-process communication mechanism, but the abbreviation IPC usually only refers to message passing, and it is the latter that is particularly relevant to microkernels.

Some, such as the Heckler & Koch VP70, will only fire single rounds unless the stock is attached, because there is a safety mechanism incorporated into the stock.

This mechanism is extremely weak for most stellar objects, only becoming significant in cases where there is a combination of extreme mass and extreme acceleration, such as with black holes or neutron stars that are orbiting each other closely.

The original POP3 specification supported only an unencrypted USER / PASS login mechanism or Berkeley. rhosts access control.

While in many lasers the laser process involves the transition of atoms between different electronic energy states, as described in the model above, this is not the only mechanism that can result in laser action.

Antlers are not the only mechanism that can be used to counteract predation.

The GRDDL ( Gleaning Resource Descriptions from Dialects of Language ) mechanism allows existing material ( including microformats ) to be automatically interpreted as RDF, so publishers only need to use a single format, such as HTML.

The minority view of August Weismann, that natural selection was the only mechanism, was called neo-Darwinism.

A Tesla turbine differs from a conventional turbine only in the mechanism used for transferring energy to the shaft.

These operators can only exceed their allocations if they buy emission allowances, or offset their excesses through a mechanism that is agreed by all the parties to UNFCCC.

Without this mechanism, only the extracellular part of the membrane proteins would reach the lumen of the lysosome, and only this part would be degraded.

Since the Auger effect is not the only mechanism available for atomic relaxation, there is a competition between radiative and non-radiative decay processes to be the primary de-excitation pathway.

It was the only thing in his life for which he felt guilt.

More of an agricultural nation, they have relied on their warriors only for defense and for survival in the endless wars of the plains.

Two of the new hands, a Mexican named Jose Amado and a kid known only as Laredo, were picked for the first trick of riding night herd.

The valley was only a few hundred yards wide with just about room enough for a properly performed hundred-and-eighty-degree turn.

Packing a small suitcase, informing her husband whom she found in Harry's Bar that she was taking a train to Germany to get away for a while, patting his arm, refusing a drink, getting on the train -- all this had only taken her two hours.

On a bitterly cold day in January, 1895, accompanied only by Neal Brown as his deputy, Tilghman left the township of Guthrie and headed for Rock Fort and Dunn's ranch.

She said, with the solicitude of a middle-aged woman for her only child.

As for states' rights, they have never counted in the thinking of my liberal friends except as irritations of a minor and immoral nature which exist now only as anachronisms.

In fact it has caused us to give serious thought to moving our residence south, because it is not easy for the most objective Southerner to sit calmly by when his host is telling a roomful of people that the only way to deal with Southerners who oppose integration is to send in troops and shoot the bastards down.

In 1961 the first important legislative victory of the Kennedy Administration came when the principle of national responsibility for local economic distress won out over a `` state's-responsibility '' proposal -- provision was made for payment for unemployment relief by nation-wide taxation rather than by a levy only on those states afflicted with manpower surplus.

They are huge areas which have been swept by winds for so many centuries that there is no soil left, but only deep bare ridges fifty or sixty yards apart with ravines between them thirty or forty feet deep and the only thing that moves is a scuttling layer of sand.

Others are confined to vast reservations, and not only does the Australian government justifiably not wish them to be viewed as exhibits in a zoo, but on their reservations they are extremely fugitive, shunning camps, coming together only for corroborees at which their strange culture comes to its highest pitch -- which is very low indeed.

It seems that for Persia, and especially for this city, there are only two times: the glorious past and the corrupt, depressing, sterile present.

`` Now that Bruno Walter is virtually in retirement and my dear friend Dimitri Mitropoulos is no longer with us, I am probably the only one -- with the possible exception of Leonard Bernstein -- who has this special affinity for and champions the works of Bruckner and Mahler ''.

The family was Protestant, but for me it was only irksome and I let it go.

He will not curb his instinctual desires but release the energy within him that makes him feel truly and fully alive, even if it is only for this brief moment before the apocalypse of annihilation explodes on earth.

The women who come to West Venice, having forsaken radicalism, are interested in living only for the moment, in being constantly on the move.

From above one could only occasionally catch a glimpse of life on the floor of this green sea: a neighbor's gingham skirt flashing into sight for an instant on the path beneath her grape-arbor, or the movement of hands above a clothesline and the flutter of garments hung there, half-way down the block.

The part of the mind that preserves dates and events may remonstrate, `` It could have been like that for only a little while '' ; ;