Since the circulating thyroid hormones are the amino acids thyroxine and tri-iodothyronine ( cf. Section C ), it is clear that some mechanism must exist in the thyroid gland for their release from proteins before secretion.

Since the mechanism of retention on this new solid support is different from the first dimensional separation, it can be possible to separate compounds that are indistinguishable by one-dimensional chromatography.

Since the early days of writing politicians, diplomats and military commanders understood that it was necessary to provide some mechanism to protect the confidentiality of correspondence and to have some means of detecting tampering.

Since some applications ( notably, but not exclusively, the parts of Microsoft Office ) allow macro programs to be embedded in documents, so that the programs may be run automatically when the document is opened, this provides a distinct mechanism by which viruses can be spread.

Since tasks consisted of multiple threads, and it was the code in the threads that used the IPC mechanism, Mach was able to freeze and unfreeze threads while the message was handled.

Since the early 1980s, an elegant solution has been the near-frictionless air bearing linear arm which requires no tracking drive mechanism other than the record groove itself.

Although catalysis of the peptide bond involves the C2 hydroxyl of RNA's P-site ( see Function section below ) adenosine in a protein shuttle mechanism, other steps in protein synthesis ( such as translocation ) are caused by changes in protein conformations. Since their catalytic core is made of RNA, ribosomes are classified as " ribozymes ," and it is thought that they might be remnants of the RNA world.

Since PHP 5. 1, there is an object-oriented serialization mechanism for objects, the < tt > Serializable </ tt > interface.

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.

Since the action spectrum of sunburn and melanogenesis are virtually identical, they are assumed to be induced by the same mechanism.

Since data could be in one of three memory spaces, a mechanism is usually provided to allow determining to which memory a pointer refers, either by constraining the pointer type to include the memory space, or by storing metadata with the pointer.

Since changes in air pressures between connected cavities lead to airflow between the cavities, initiation is also referred to as an airstream mechanism.

Since then, the debate about the extinction of the dinosaurs and other mass extinction events has centered on whether the extinction mechanism was the asteroid impact, widespread volcanism ( which occurred about the same time ), or some other mechanism or combination.

Since this carrier enzyme ( Na < sup >+</ sup >- Ca < sup > 2 +</ sup > translocator ) uses the Na gradient generated by the Na < sup >+</ sup >- K < sup >+</ sup > pump to remove Ca < sup > 2 +</ sup > from the intracellular space, slowing down the Na < sup >+</ sup >- K < sup >+</ sup > pump results in a permanently elevated Ca < sup > 2 +</ sup > level in the muscle, which may be the mechanism of the long-term inotropic effect of cardiac glycosides such as digoxin.

Since the thalidomide tragedy of the sixties, scientists around the world have been trying to elucidate thalidomide's teratogenic mechanism of action.

Since recoil has been mostly removed, the heavy and complex gun carriage and recoil damping mechanism can be dispensed with.

Since pronounced blushing is also characterized by a deep reddening of the skin, vasodilation of the venous plexus is probably the physical mechanism underlying it.

Since the allocations must inherently be made based on expectations of future events, the mechanism for allocation must provide for prospective adjustments where prior projections of events have proved incorrect.

Since the image is projected onto the film backwards and upside down, the turntable spins in the direction opposite of the direction of the film advance mechanism.

Since 1984, a mechanism for intermodal shipping known as double-stack rail transport has become increasingly common.

Since these offices had been abolished, Lord Wilberforce argued, there was no mechanism by which Irish peers could be elected.

Since the backward travel distance is primarily a function of the compressibility of the high friction surface, this mechanism can result in significantly reduced backlash.

Since most of the goods produced by the economy were covered by this control mechanism, producing units had difficulty obtaining needed items over and above their allocated levels.

Since 28 June 2004, the litas has been part of the ERM II, the EU's exchange rate mechanism.

Since the Supreme Court's decision of that year this is more doubtful ; ;

( Since the time-span of the nation-state coincides roughly with the separate existence of the United States as an independent entity, it is perhaps natural for Americans to think of the nation as representative of the highest form of order, something permanent and unchanging.

Since it is not far from Viareggio, he will visit Puccini's house, as he never fails to do, to pay his respects to the memory of the composer of La Boheme, which he considers one of Puccini's masterpieces.

Since attack serves to stimulate interest in broadcasts, I added to my opening statement a sentence in which I claimed that German youth seemed to lack the enthusiasm which is a necessary ingredient of anger, and might be classified as uninterested and bored rather than angry.

Since the air is a continuum, the network of communication remains intact regardless of the positions or motions of the points ( the people ) in the net.

Since the hazards of poor communication are so great, p can be justified as a habitable site only on the basis of unusual productivity such as is made available by a waterfall for milling purposes, a mine, or a sugar maple camp.

Since the difficulty of drawing the net is great, we will merely discuss it.

Since a civilizational crisis involves also a crisis in private interests and in the ruling class, reaction is normally found among those who feel themselves to be among the ruling class.

Since civilizational change is the most difficult to perceive and analyze, it seldom is given adequate attention.

Since the slogans have little application to reality and are sanctimonious to boot, the applause is faint even in areas of the world where we should expect to find the greatest affection for free government.

Since more is known about Quiney than about any other acquaintance of Shakespeare in Stratford, his career may be followed to its sudden end in 1602.

Since the great flood of these dystopias has appeared only in the last twelve years, it seems fairly reasonable to assume that the chief impetus was the 1949 publication of Nineteen Eighty-Four, an assumption which is supported by the frequent echoes of such details as Room 101, along with education by conditioning from Brave New World, a book to which science-fiction writers may well have returned with new interest after reading the more powerful Orwell dystopia.

Since Laos is of no more purely military value to Moscow itself than it is to Washington, this approach might be expected to head off Mr. Khrushchev for the moment.

Since little is known about autism, and almost nothing has been written for the layman, we'd like to share one experienced mother's comments.

Since the work is done by hand, the only limitation, it is said, `` is that of human conception ''.

Since the apparatus is new, it requires experimentation and changes in technique.

Since the obvious is not always true, the Republican National Committee wisely analyzed its defeat of last autumn and finds that it occurred, as suspected, in the larger cities.

Since he has just shown who is top dog, he may not be ready to receive this highest honor in the gift of the Soviet people.

Since appeals to morality, to humanity, and to sanity have had such small effect, perhaps our last recourse is the deterrent example.

Since the goal of our international planners is a World Government, this Atlantic Community would mark a giant step in that direction for, once American economic autonomy is absorbed, a larger grouping is a question of time.