5 resultados para Contrast Agent
em Brock University, Canada
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At head of title: For the International Geological Congress.
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A notice of change in reparation agent between Robert Morrogh and Thomas Douglas from Quebec to Daniel Shannon in Niagara.
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The National Seaman’s Association was a labour recruiter hiding behind a union-like name. It was run by H.N. McMaster who collected fees from companies and dues from workers. With McMaster in charge, shipping interests could claim that their seamen had a union, but ship-owners were free to push their vessels and their workers to the breaking point. In 1935, the members on the Great Lakes decided to strike. One year later, they created their own union and amalgamated with a Montreal-based independent body to create the Canadian Seamen’s Union headed by a ship’s cook who became a union leader, John Allan Patrick “Pat” Sullivan. By the late 1940s, almost all sailors on Canadian ships were CSU members. Right from its inception in 1936, Communists were prominent among the leaders of the union. Sullivan had been recruited to the Communist party that year and the union had a close rapport with the party. On June 8, 1940, Pat Sullivan was arrested because of his affiliation with the Communist party. He was incarcerated until March 20, 1942. No charges were laid, no bail was set and there was no trial. After his release, Sullivan was elected second vice-president of the Trades and Labour Congress of Canada. In 1943, Percy Bengough was elected as president and Sullivan was elected as secretary treasurer of the TLC while maintaining his role as president of the CSU. On March 14, 1947 Sullivan made a shocking announcement that he was resigning from the CSU and the Labor-Progressive Party. He claimed that the CSU was under the full control of the Communists. Within a month of this announcement, he emerged as the president of the Canadian Lake Seamen’s Union. Ship-owners never really reconciled themselves to having their industry unionized, and in 1946 there was a seamen’s strike in which the union won the eight-hour day. In 1949, the shipping companies had a plan to get rid of the union and were negotiating behind their back with the Seafarers International Union (SIU). In a brutal confrontation, led by Hal Banks, an American ex-convict, the SIU was able to roust the CSU and take over the bargaining rights of Canadian seamen. On July 15, 1948, Robert Lindsay, who was Sullivan’s Welland business agent said that to the best of his knowledge, Sullivan’s outfit, the CLSU, was under the control of some of the Steamship Companies. Lindsay had heard that there was a movement to get rid of Bengough of the Trades and Labour Congress as well as elements of the CSU. He also had heard that the CLSU wanted to affiliate with the American Federation of Labor. Lindsay’s allegations raised the questions: Were the ship-owners powerful enough to oust Percy Bengough because he supported the seamen? Could the CLSU get an affiliation with the American Federation of Labor? and Would the American Federation of Labor actually affiliate with a union that was siding with employers against a locked-out union?
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The preparation and characterization of coordination complexes of Schiff-base and crown ether macrocycles is presented, for application as contrast agents for magnetic resonance imaging, Project 1; and single-molecule magnets (SMMs), Projects 2 and 3. In Project 1, a family of eight Mn(II) and Gd(III) complexes of N3X2 (X = NH, O) and N3O3 Schiff-base macrocycles were synthesized, characterized, and evaluated as potential contrast agents for MRI. In vitro and in vivo (rodent) studies indicate that the studied complexes display efficient contrast behaviour, negligible toxicity, and rapid excretion. In Project 2, DyIII complexes of Schiff-base macrocycles were prepared with a view to developing a new family of mononuclear Ln-SMMs with pseudo-D5h geometries. Each complex displayed slow relaxation of magnetization, with magnetically-derived energy barriers in the range Ueff = 4 – 24 K. In Project 3, coordination complexes of selected later lanthanides with various crown ether ligands were synthesized. Two families of complexes were structurally and magnetically analyzed: ‘axial’ or sandwich-type complexes based on 12-crown-4 and 15-crown-5; and ‘equatorial’ complexes based on 18-crown-6. Magnetic data are supported by ab initio calculations and luminescence measurements. Significantly, the first mononuclear Ln-SMM prepared from a crown ether ligand is described.
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Advertisement (printed 1 page) advertising Charles Dwight, agent for The Western Bond Board of Kansas City, 1872, n.d.