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Results 1 - 10 from 29 for stable isotopes in 0.405 sec.

Lead | An Introduction to Indoor Air Quality | Indoor Air | Air | US EPA
York, 1977.] Metallic element of atomic number 82, Group IVA of the periodic table. Atomic weight 207.2; valences 2, 4; 4 stable isotopes. The isotopes are the end products of the three series of natural radioactive elements uranium (206), thorium (208), and actinium (207). Properties - Heavy, ductile, soft gray solid. Sp. gr. 11.35; m.p. 327.4oC; b.p. 1755oC; ...
epa.gov

University of Massachusetts Amherst Department of Geosciences
Laurie Brown Professor Acting Department Head gephysics, paleomagnetism (413) 545-0245 Stephen J. Burns Professor paleoclimatology, sediment diagenesis, stable isotopes, speleothems (413) 545-0142 Christopher D. Condit Associate Professor digital mapping, basaltic volcanism, planetary geology (413) 545-0272 Michele Lynn Cooke Associate Professor structural ...
www.geo.umass.edu

Products: Science Briefs
Moosehorn NWR wetlands 31 Breeding bird surveys at Northeast Creek and Bass Harbor, Acadia NP 32 Variables affecting the black duck decline and current status of black ducks and mallards in southern Ontario 33 Use of Stable Isotopes to Determine the Relative Importance of Horseshoe Crab Eggs to Long-Distance Migrant Shorebirds in Delaware Bay 34 Length of ...
www.pwrc.usgs.gov

Benefits of Magnesium-Rich Mineral Waters
These naturally occurring elements are used as markers to follow the transit of magnesium ... Turnlund) was presented at two congresses (Tma 10, May 2-7, 1999 and International Conference on Stable Isotopes and Isotopic Effects, Carry le Rouet, France, June 20-25, 1999). This page was first ...
mgwater.com

IOW - Biological Oceanography
Dr. Doris Schiedek Organic pollutants in organisms Dr. Rolf Schneider Distribution patterns of stable isotopes, sources of eutrophication, nitrogen transformations Dr. Maren Vo Phytoplankton succession and production Dr. Norbert Wasmund Coastal zone management and ecological modelling Dr. Gerald ...
www.io-warnemuende.de

IOW - Hydrographisch-chemische Zustandseinschätzung der Ostsee 1999
U., Emeis, K.-C., Voss, M., Krom, M. and Sakamoto, T., im Druck. Biological productivity during sapropel S5 formation in the eastern Mediterranean Sea - Evidence from stable isotopes of nitrogen and carbon. Geochimica et Cosmochimica Acta. aktualisiert: 04.09.2001 Fragen und Anregungen zu dieser Seite an: barbara.hentzsch@io-warnemuende.de Copyright 2000 Leibniz-Institut fr Ostseeforschung ...
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Technetium (Tc) - Chemical properties, Health and Environmental effects
C Melting point 2200 oC Boiling point 4877 oC Vanderwaals radius 0.128 nm Isotopes 9 Electronic shell [ Kr ] 4d6 5s1 Discovered by Carlo Perrier in 1937 Technetium Technetium is a ... the isotopes of technetium are radioactive. It is one of two elements with Z < 83 that have no stable isotopes; the other element is promethium (Z = 61). Technetium has three long lived radioactive isotopes: ...
lenntech.com

Ytterbium (Yb) - Chemical properties, Health and Environmental effects
C Melting point 824 C Boiling point 1466 C Vanderwaals radius unknown Ionic radius unknown Isotopes 9 Electronic shell [ Xe ] 4f14 6s2 Energy of second ionisation 602.4 kJ.mol -1 Energy ... in several rare minerals as gadolinite, monazite, and xenotime. Natural ytterbium is a mix of seven stable isotopes. It is most often recovered commercially from monazite sand (~0.03% ytterbium). The main ...
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SPRING 2002 PROGRAM
I. Valiela Boston Univ. Marine Program, Marine Biological Laboratory, Woods Hole, MA 02543 USING N STABLE ISOTOPES TO LINK GROWTH RESPONSES OF COMMERCIALLY IMPORTANT BIVALVES TO LAND-DERIVED N LOADS 9:10 (K ... Wildlife Research Center, Augusta, ME 04330 THE EFFECT OF NUTRIENT LOADING ON AN ESTUARINE FOOD WEB: A STABLE ISOTOPE APPROACH 9:50 (K) Fulweiler*, R.W., S. W. Nixon, B. Buckley, and S. L. ...
neers.org

Office of Habitat Conservation
Living deep-sea corals have been dated to be more than a hundred years old and stable isotopes incorporated in their skeletons give clues to past temperatures. Dead corals forming deep banks have been radiocarbon-dated to be > 40,000 years. What are the major threats? The major threat to cold-water coral ecosystems appears ...
www.nmfs.noaa.gov