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 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 aldosterone is responsible for increasing the excretion of potassium, ACE inhibitors can cause retention of potassium.

Since salt restriction is the basic concept in treatment, and aldosterone is one of the hormones that acts to increase salt retention, a medication that counteracts aldosterone should be sought.

Since most middle school students value their education more, retention should be used if they are judged not to have adequate skills before entering high school.

Since the boiling point of undecane ( 196 ° C ) is well known, it may be used as a comparison for retention times in a gas chromatograph for molecules whose structure has been freshly elucidated.

Since each type of molecule has a different rate of progression, the various components of the analyte mixture are separated as they progress along the column and reach the end of the column at different times ( retention time ).

Since 1972 South Carolina AHEC has influenced the education, supply, retention, and geographic distribution of health care professionals statewide, particularly in smaller, underserved communities.

Since the preterite-present verbs are non-past and signify current states ( temporalized as present tense ), they constitute a retention of the non-past nature of the Indo-European perfect.

Since the late 1990s the organization's campaigns, media activity and projects have focused on a wide spectrum of issues, including Internet privacy, international government cooperation, passenger name record transfers, data protection law, anti-terrorism developments, freedom of information, Internet censorship, identity systems, corporate governance, the appointment of privacy regulators, cross-border data flows, data retention, judicial process, government consultation procedures, information security, national security, cybercrime and aspects of around a hundred technologies and technology applications ranging from video surveillance to DNA testing.

Since its initial launch, DocuShare has added capabilities in workflow / business process management, production imaging, records and retention management, social collaboration, and enterprise scalability.

Since 1972, the tribe has also operated a cultural retention program funded by the North Carolina Arts Council and private contributions.

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 his Christ was to be life size, how was Mary to hold him on her lap without the relationship seeming ungainly??

Since that time the demands of the citizens for new and expanded services have placed financial burdens on the state which could not have been foreseen in earlier years.

Since the validity of all subsequent planning depends on the accuracy of the basic inventory information, great care is being taken that the inventory is as complete as possible.

Since April 15, 1962, is on Sunday your return for the calendar year 1961 will be timely filed if it is filed on or before Monday, April 16, 1962.

Since you contributed more than half of his support, you may also claim an exemption for him on your return.

Since charges are relatively the same, reserving a car before you leave for Europe will assure you of having one on tap when you want it.

Since emotional reactions in the higher vertebrates depend on individual experience and are aroused in man, in addition, by complex symbols, one would expect that the hypothalamus could be excited from the cortex.

Since two curves of symbol Af on Q intersect in Af points, it follows that there are Af lines of Af which are tangent to Aj.

Since her bereavement this individual has reported to the writer on numerous occasions about how helpful the class discussions were to her in this adjustment crisis.

Since the details of the elections were settled the change of government had no direct effect on the technical aspects of the elections, and may have been more important as an indication of royal displeasure with the U.N.F.P.

Since on the one hand school desegregation has come in Virginia hand-in-glove with pupil assignment, shall we support the plan??

Since I have already discussed his moral position, that discussion is incorporated by reference into the following pages, which will focus on the empirical and analytic side of Fromm's treatment.

Since the earth is rotating and the unleveled gyro-stabilized platform is fixed with respect to a reference in space, an observer on the earth will see the platform rotating ( with respect to the earth ).

Since the psychiatric interview, like any other interview, depends on communication, it is significant to note that the therapist in this interview was a man of marked skill and long experience.

Since the change to better nutrition, he feels he can report on improvements in health, though he considers the following statements observations and not scientific proof.

Since 1949, the St. Louis club has been below on May 1 just four times.

Since the railroad cannot reduce the salary of individual union members under contract, it must accomplish its payroll reduction by placing some of the men on furlough, a B. & O. spokesman said.

( page 33 ) On the other hand, a little later on he says: `` Since 1692 a great but superficial change has wiped out God's beard and the Devil's horns, but the world is still gripped between two diametrically opposed absolutes.

Since the hero, a sterling and upright fellow, is a rich Brown senior, while two Yalies are cast as virtual rapists, I suppose I should disqualify myself from sitting in judgment on `` Where The Boys Are '', but I shall do nothing of the sort.

Since then and during the first decade, the results were given to newspapers for publication at 11 pm on the night of the awards.

Since then, it has focused on improving relationships with Western countries, cultivating links with other Portuguese-speaking countries, and asserting its own national interests in Central Africa through military and diplomatic intervention.

Since 1998, Angola has successfully worked with the United Nations Security Council to impose and carry out sanctions on UNITA.

Since membership is based on a province's communion with Canterbury, expulsion would require the Archbishop of Canterbury's refusal to be in communion with the affected jurisdiction ( s ).