Toronto Lake, Canada

Fig. 25. Series of towers comprising part of the heavy water production plant at Ontario Hydro s Bruce nuclear power complex near Tiverton on the shores of Lake Huron. Heavy water is a clear, colorless liquid that looks and tastes like ordinary water. It occurs naturally in ordinary water in the proportion of approximately one part heavy water to 7000 parts of ordinary water. While ordinary water is a combination of hydrogen and oxygen (H20), heavy water (D.-1.0) is made of up of deuterium—a form, or isotope, of hydrogen—and oxygen. Deuterium is heavier than hydrogen in that it has an extra neutron in its atomic nucleus, so heavy water weighs about 10% more than ordinary water. It also has different freezing and boiling points. It is the extra neutron that makes heavy water more suitable than ordinary water for use in CANDU nuclear reactors as both a moderator and a heat transport medium. (Ontario Hydro, Toronto, Ontario, Canada)...

The vaginal retention and antiviral (anti-HIV) effect of different N-9 formulations were compared [43] Advantage 24 (cream) (Lake Pharmaceutics, Columbia Laboratories Inc., Livingston, NJ, USA), Conceptrol (cream) (Ortho Pharmaceuticals, Family Health International, Research Triangle Park, NC, USA), Deflon Foam (foam) (Ortho Pharmaceuticals, Janssen-Ortho Inc., Toronto, Ontario, Canada), Semicid (suppository) (Whitehall Pharmaceuticals, Whitehall-Robbins Healthcare, Madison, NJ, USA), and VCF (film) (Apothecus Pharmaceutical Corporation, Oyster Bay, NY, USA). Even though there was a great variability... 

This manuscript was prepared while BBW was supported by a Natural Sciences and Engineering Research Council of Canada postdoctoral fellowship. We thank R. Pienitz for providing Queen s Lake and Toronto Lake diatom-inferred DOC data and R.V. Krish-namurthy for Austin Lake bulk organic C/N and kerogen data. Enthusiastic support for isotope paleoenvironmental studies at the University of Waterloo by the staff of the Environmental Isotope Laboratory is greatly appreciated. 

PhD candidate, Department of Geography, York University, Toronto, ON, Canada Director of the Zephyr Society of Lake Simcoe, Sutton West, ON, Canada e-mail paul harpley.ca... 

An analysis of potential human exposure to contaminants in drinking water and foods was conducted in Ontario, Canada, in 1980. Mirex was detected only in edible fish taken from Toronto Harbor on Lake Ontario. The average mirex concentrations were 0.001 mg/kg (ppm) wet weight for white sucker, 0.01 mg/kg wet weight for rainbow trout, and 0.033 mg/kg wet weight for northern pike. Estimated human exposure levels, based on an average fish consumption of 0.53 kg/year for each fish species, were 0.0005 for white sucker, 0.0005 for rainbow trout, and 0.017 mg/year for northern pike, respectively (Davies 1990). 

Canada, 79, 92, 113, 250, 312, 387, 393 Alberta, 222 British Columbia, 411 Anyox, 402 Manitoba, 336 Boggy Lake, 347 Newfoundland Labrador, 330, 375 Northwest Territories Great Bear Lake, 362 Ontario, 336 Bancroft, 359, 363, 365 Elliott Lake, 330 Ottawa, 332, 363 Toronto, 258 Quebec... 

Taylor, G. (2002). TANCO, Special Report. Supplement to Trade and Commerce Magazine, 4 pp. Tindle, A. G., and Breaks, F. W. (2000). Tantalum Mineralogy of Rare-Element Granitic Pegmatites from the Separation Lake Area, Northwestern Ontario, Canada. Ontario Geol. Survey, Toronto, Open File Rept. No. 6022, 378 pp. Mineralogy and Petrology, Vol. 70, pp. 165-198. 

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