Metals in the annual rings of eastern white pine (Pinus strobus) in southwestern Ontario by secondary ion mass spectroscopy (SIMS)

1997 ◽  
Vol 27 (1) ◽  
pp. 76-79 ◽  
Author(s):  
R R Martin ◽  
J P Zanin ◽  
M J Bensette ◽  
M Lee ◽  
E Furimsky
Keyword(s):  
Mass Spectroscopy ◽  
Pinus Strobus ◽  
Annual Rings ◽  
White Pine ◽  
Eastern White Pine ◽  
Secondary Ion Mass Spectroscopy ◽  
Secondary Ion

Age characteristics of coarse woody debris (Pinus strobus) in a lake littoral zone

1999 ◽  
Vol 56 (3) ◽  
pp. 496-505 ◽  
Author(s):  
Richard P Guyette ◽  
William G Cole
Keyword(s):  
Coarse Woody Debris ◽  
Littoral Zone ◽  
Woody Debris ◽  
Pinus Strobus ◽  
Late Nineteenth Century ◽  
Annual Rings ◽  
White Pine ◽  
Eastern White Pine ◽  
Minimum Diameter ◽  
The Mean

Littoral coarse woody debris (CWD) is a persistent class of aquatic habitat that accumulates over many centuries and provides habitat for diverse floral and faunal communities. We used dendrochronological methods to analyze residence times and age-related characteristics of eastern white pine (Pinus strobus) CWD in the littoral zone of Swan Lake in Algonquin Provincial Park, Ontario. The mean calendar date of all the annual rings in CWD samples was 1551. Annual rings dated from calendar year 1893 to 982. The mean time from carbon assimilation in a live tree to carbon loss from littoral woody debris was 443 years. Outside ring dates of the woody debris were significantly correlated with the bole's maximum and minimum diameter ratio, mass, specific gravity, length, and submergence. Negative exponential functions described the temporal structure of the CWD mass and abundance. Accelerated inputs of woody debris resulted from late nineteenth century logging and a disturbance circa 1500. No mature eastern white pine have fallen into the lake over the last 100 years.

Effect of Point Defect Injection on B diffusion in C containing Si and SiGe

2004 ◽  
Vol 809 ◽  
Author(s):  
Mudith S. A. Karunaratne ◽  
Janet M. Bonar ◽  
Jing Zhang ◽  
Arthur F. W. Willoughby
Keyword(s):  
Computer Simulation ◽  
Point Defect ◽  
Mass Spectroscopy ◽  
Diffusion Coefficients ◽  
Secondary Ion Mass Spectroscopy ◽  
Annealing Conditions ◽  
Defect Injection ◽  
Before And After ◽  
Secondary Ion

ABSTRACTIn this paper, we compare B diffusion in epitaxial Si, Si with 0.1%C, SiGe with 11% Ge and SiGe:C with 11%Ge and 0.1%C at 1000°C under interstitial, vacancy and non-injection annealing conditions. Diffusion coefficients of B in each material were extracted by computer simulation, using secondary ion mass spectroscopy (SIMS) profiles obtained from samples before and after annealing.Interstitial injection enhances B diffusion considerably in all materials compared to inert annealing. In samples which experienced vacancy injection, B diffusion was suppressed. The results are consistent with the view that B diffusion in these materials occurs primarily via interstitialcy type defects.

Metal—Polyimide Interfaces Characterized by Secondary Ion Mass Spectroscopy

1990 ◽  
pp. 297-311 ◽  
Author(s):  
B. K. Furman ◽  
S. Purushothaman ◽  
E. Castellani ◽  
S. Renick ◽  
D. Neugroshl
Keyword(s):  
Mass Spectroscopy ◽  
Secondary Ion Mass Spectroscopy ◽  
Secondary Ion

scholarly journals AIR-LAYERING OF EASTERN WHITE PINE (Pinus strobus L.)

1959 ◽  
Vol 35 (1) ◽  
pp. 19-21 ◽  
Author(s):  
J. L. Farrar ◽  
W. D. McJannet
Keyword(s):  
Pinus Strobus ◽  
White Pine ◽  
Eastern White Pine
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