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spec: The differences appear wholly arbitrary . Though it 's not a primary focus of his work , Michael Mayer , who trained in chemistry and biophysics , is also intrigued by a 20-nanometer motor called ATP synthase . If an illegal worker working in the United States today gets a " work authorized " Social Security number through guest worker immigration legislation , the Totalization Agreement , or perhaps just over time , that worker could eventually apply for Social Security benefits once he or she has met eligibility requirements . All of the agreements are with developed nations with economies similar to that of the U.S. For example , a worker who turns 62 after 1990 generally needs 40 calendar quarters of coverage to receive retirement benefits . " We are excited that they are getting the acknowledgment they deserve after all the hard work and dedication of the past two years . We are countries with different cultures and traditions , but we share many common objectives . Poetry was born among the shepherds . We have to be able to do better than we're doing now . Each molecule of ATP fuel that kinesin encounters triggers precisely one 8 nanometer step of the longshoreman . `` ( a ) . Is that enough ? All data on tapes , floppies , write once CDs , inside . Encourage your children to write daily journals . Neither of us is wealthy but we have children from first marriages . It is also constructed to run backwards , a trick some bacteria use to spit out protons in response to ATP . Mr. Haueter has represented underwriters and issuers in a broad range of public and private debt and equity financings , merger and acquisition transactions and other corporate matters . That was evidently very effective . Once an immigrant gains access to a work authorized Social Security number - - whether a legal citizen or not - - wages earned while in the U.S. unlawfully could be reinstated to the worker 's new Social Security account . If you purchased or acquired publicly traded DCC securities during the period from May 6 , 2003 through August 9 , 2004 , inclusive , your rights may be affected by the settlement of this Action , including the release and extinguishment of claims you may possess relating to your purchase and / or acquisition of DCC publicly traded securities during the settlement class period . Even though the ropes were used on steep slopes , accidents can and do happen , even yet . A molecule of ATP fuel produces one " stroke " of the myosin leg , like a single stroke of a rowing machine . Unfortunately , I am an old heretic . " Nothing is standing in the way of OSHA issuing a final PPE rule to protect worker safety and health except the will to do so . Several other people helped as well . You may trust them , but I think they're idiots .