scholarly journals Reconnaissance for trace metals in bed sediment, Wright Patman Lake, near Texarkana, Texas

Fact Sheet ◽  
2001 ◽  
Author(s):  
Paul W. McKee
Keyword(s):  
Trace Metals ◽  
Bed Sediment

Bed sediment-associated trace metals in an urban stream, Oahu, Hawaii

2000 ◽  
Vol 39 (6) ◽  
pp. 611-627 ◽  
Author(s):  
R. A. Sutherland
Keyword(s):  
Trace Metals ◽  
Urban Stream ◽  
Bed Sediment

scholarly journals Spatial and temporal trends of trace metals in surface water, bed sediment, and biota of the upper Clark Fork Basin, Montana, 1985-95

1997 ◽  
Author(s):  
Michelle I. Hornberger ◽  
J.H. Lambing ◽  
S.N. Luoma ◽  
E.V. Axtmann
Keyword(s):  
Surface Water ◽  
Trace Metals ◽  
Temporal Trends ◽  
Bed Sediment ◽  
Spatial And Temporal Trends

scholarly journals Trace Metals in the Bed Sediment of Small Urban Streams

2012 ◽  
Vol 5 (1) ◽  
pp. 48-55 ◽  
Author(s):  
Jana Nabelkova
Keyword(s):  
Trace Metals ◽  
Urban Streams ◽  
Bed Sediment

Potentially Toxic Trace Metals in Water and Lake-Bed Sediment of Panchpokhari, an Alpine Lake Series in the Central Himalayan Region of Nepal

2017 ◽  
Vol 228 (8) ◽  
Author(s):  
Rosha Raut ◽  
Roshan Man Bajracharya ◽  
Subodh Sharma ◽  
Chhatra Mani Sharma ◽  
Shichang Kang ◽  
...  
Keyword(s):  
Trace Metals ◽  
Alpine Lake ◽  
Himalayan Region ◽  
Bed Sediment ◽  
Toxic Trace Metals

XRF and PIXE Analysis of light and Dark Adapted Ocular Tissue

1982 ◽  
Vol 40 ◽  
pp. 190-191
Author(s):  
B. J. Panessa ◽  
H. W. Kraner ◽  
J. B. Warren ◽  
K. W. Jones
Keyword(s):  
Trace Metals ◽  
Pigment Epithelium ◽  
Nerve Impulse ◽  
Light Response ◽  
Ocular Tissue ◽  
Emission Spectrometry ◽  
Retinol Dehydrogenase ◽  
Pixe Analysis ◽  
X Ray ◽  
Optimal Function

During photoexcitation the retina requires specific electrolytes and trace metals for optimal function (Na, Mg, Cl, K, Ca, S, P, Cu and Zn). According to Hagins (1981), photoexcitation and generation of a nerve impulse involves the movement of Ca from the rhodopsin-ladened membranes of the rod outer segment (ROS) to the plasmalemma, which in turn decreases the in-flow of Na into the photoreceptor, resulting in hyperpolarization. In toad isolated retinas, the presence of Ba has been found to increase the amplitude and prolong the delay of the light response (Brown and Flaming, 1978). Trace metals such as Cu, Zn and Se are essential for the activity of the metalloenzymes of the retina and retina pigment epithelium (RPE) (i.e. carbonic anhydrase, retinol dehydrogenase, tyrosinase, glutathione peroxidase, superoxide dismutase...). Therefore the content and fluctuations of these elements in the retina and choroid are of fundamental importance for the maintenance of vision. This paper presents elemental data from light and dark adapted frog ocular tissues examined by electron beam induced x-ray microanalysis, x-ray fluorescence spectrometry (XRF) and proton induced x-ray emission spectrometry (PIXE).

Identifying Sources of Sulfate Aerosols Reaching Whiteface Mountain, NY

1985 ◽  
Vol 43 ◽  
pp. 98-101
Author(s):  
James S. Webber
Keyword(s):  
Trace Metals ◽  
Acid Deposition ◽  
Surface Waters ◽  
Dry Deposition ◽  
Coal Combustion ◽  
Public Awareness ◽  
Sulfate Aerosols ◽  
Wet And Dry Deposition ◽  
Whiteface Mountain ◽  
Toxic Trace Metals

INTRODUCTION“Acid rain” and “acid deposition” are terms no longer confined to the lexicon of atmospheric scientists and 1imnologists. Public awareness of and concern over this phenomenon, particularly as it affects acid-sensitive regions of North America, have increased dramatically in the last five years. Temperate ecosystems are suffering from decreased pH caused by acid deposition. Human health may be directly affected by respirable sulfates and by the increased solubility of toxic trace metals in acidified waters. Even man's monuments are deteriorating as airborne acids etch metal and stone features.Sulfates account for about two thirds of airborne acids with wet and dry deposition contributing equally to acids reaching surface waters or ground. The industrial Midwest is widely assumed to be the source of most sulfates reaching the acid-sensitive Northeast since S02 emitted as a byproduct of coal combustion in the Midwest dwarfs S02 emitted from all sources in the Northeast.

Quantification and localization of trace metals in natural plankton cells using a synchrotron X-ray fluorescence microprobe

2003 ◽  
Vol 104 ◽  
pp. 435-438 ◽  
Author(s):  
B. S. Twining ◽  
S. B. Baines ◽  
N. S. Fisher ◽  
C. Jacobsen ◽  
J. Maser
Keyword(s):  
Trace Metals ◽  
X Ray

Imaging and quantification of trace metals in thin biological specimens using microprobe techniques: Synchrotron induced X-ray fluorescence microprobe and nuclear microprobe

2003 ◽  
Vol 104 ◽  
pp. 321-324 ◽  
Author(s):  
T. Pinheiro ◽  
L. C. Alves ◽  
A. Barreiros ◽  
F. Araujo ◽  
S. Bohic ◽  
...  
Keyword(s):  
Trace Metals ◽  
Nuclear Microprobe ◽  
X Ray

The Bioavailability and Evolution of Trace Metals in Environment: A Brief Review

2016 ◽  
Vol 3 (1) ◽  
pp. 1-5
Author(s):  
Hui Zhang ◽  
Keyword(s):  
Trace Metals

RESEARCH OF TRACE METALS DISTRIBUTION BETWEEN THERMAL TREATMENT PRODUCTS OF SOME COALS

2016 ◽  
pp. 35-39
Author(s):  
D. V. Kabanov ◽  
V. G. Merkulov
Keyword(s):  
Trace Metals ◽  
Thermal Treatment
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