Estimated Loads of Suspended Sediment and Selected Trace Elements Transported through the Milltown Reservoir Project Area Before and After the Breaching of Milltown Dam in the Upper Clark Fork Basin, Montana, Water Year 2008

2009 ◽  
Author(s):  
John H. Lambing ◽  
Steven K. Sando
Keyword(s):  
Trace Elements ◽  
Suspended Sediment ◽  
Project Area ◽  
Before And After ◽  
Reservoir Project ◽  
Milltown Reservoir

Changes in the serum level of the trace elements in chronic renal

2021 ◽  
Vol 2 (3) ◽  
pp. 402-409
Author(s):  
Baghdad Science Journal
Keyword(s):  
Trace Elements ◽  
Serum Level ◽  
Blood Serum ◽  
Healthy People ◽  
Control Group ◽  
Before And After ◽  
Iron And Zinc

Were studied changes in the concentration of copper, iron and zinc in blood serum of one hundred patients with chronic kidney and treated dialysis blood were also measured the level of calcium kidney and phosphate Calciotropic in serum of these patients took samples of blood from these patients before and after treatment dialysis vessels as well as the statement of changes in those standards Alkimaahiatih Results were compared with twenty-five healthy people (control group)

PRE- AND POSTOPERATIVE EXCRETION OF TRACE ELEMENTS IN PRIMARY HYPERPARATHYROIDISM

1969 ◽  
Vol 60 (3) ◽  
pp. 380-388 ◽  
Author(s):  
Harry Boström ◽  
Per Olov Wester
Keyword(s):  
Trace Elements ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Primary Hyperparathyroidism ◽  
Urinary Excretion ◽  
Healthy Subjects ◽  
Biological Significance ◽  
Urinary Levels ◽  
Before And After ◽  
Exchange Technique

ABSTRACT A comparison of the range of urinary excretion of 20 elements (Ag, As, Au, Br, Ce, Cd, Cs, Cu, Fe, Hg, La, Mg, Mo, Rb, Sb, Sc, Se, Sm, W, Zn) in healthy subjects as well as in patients with primary hyperparathyroidism before and after operation was performed by means of a recently developed ion-exchange technique following neutron activation analysis. The urinary levels of the 20 trace elements showed no distinct differences when the controls were compared with the untreated cases of hyperparathyroidism. Small differences in the urinary excretion of certain trace elements in patients with hyperparathyroidism before and after operation were, however, revealed. The biological significance of these findings is discussed.

Changes in the Serum Levels of Trace Elements Before and After the Operation in Thyroid Cancer Patients

2016 ◽  
Vol 175 (1) ◽  
pp. 57-64 ◽  
Author(s):  
Abdulkerim Kasim Baltaci ◽  
Tugrul Kadir Dundar ◽  
Faruk Aksoy ◽  
Rasim Mogulkoc
Keyword(s):  
Trace Elements ◽  
Thyroid Cancer ◽  
Cancer Patients ◽  
Serum Levels ◽  
Before And After

scholarly journals Reduced fine sediment flux in response to the managed diversion of an upland river channel

2015 ◽  
Vol 3 (4) ◽  
pp. 1179-1220
Author(s):  
M. T. Perks ◽  
J. Warburton
Keyword(s):  
Suspended Sediment ◽  
Fine Sediment ◽  
Sediment Flux ◽  
Analysis Of Covariance ◽  
Before And After ◽  
Suspended Sediment Concentrations ◽  
Sediment Transfer ◽  
The Uk ◽  
The Impact ◽  
B Coefficients

Abstract. This paper describes the implementation of a novel mitigation approach and subsequent adaptive management, designed to reduce the transfer of fine sediment in Glaisdale Beck; a small upland catchment in the UK. Hydro-meteorological and suspended sediment datasets are collected over a two year period spanning pre- and post-diversion periods in order to assess the impact of the channel reconfiguration scheme on the fluvial suspended sediment dynamics. Analysis of the river response demonstrates that the fluvial sediment system has become more restrictive with reduced fine sediment transfer. This is characterised by reductions in flow-weighted mean suspended sediment concentrations from 77.93 mg L−1 prior to mitigation, to 74.36 mg L−1 following the diversion. A Mann–Whitney U test found statistically significant differences (p < 0.001) between the pre- and post-monitoring median SSCs. Whilst application of one-way analysis of covariance (ANCOVA) on the coefficients of sediment rating curves developed before and after the diversion found statistically significant differences (p < 0.001), with both Log a and b coefficients becoming smaller following the diversion. Non-parametric analysis indicates a reduction in residuals through time (p < 0.001), with the developed LOWESS model over-predicting sediment concentrations as the channel stabilises. However, the channel is continuing to adjust to the reconfigured morphology, with evidence of a headward propagating knickpoint which has migrated 120 m at an exponentially decreasing rate over the last 7 years since diversion. The study demonstrates that channel reconfiguration can be effective in mitigating fine sediment flux in upland streams but the full value of this may take many years to achieve whilst the fluvial system, slowly readjusts.

Sign in / Sign up

Export Citation Format

Share Document