Inversion of Total Copper Content in Mining Soils with Different Spectral Pretreatment Techniques Using AHSI/ZY1-02D Data

2021 ◽  
Author(s):  
Kun Shang ◽  
He Gu ◽  
Yayu Yang
Keyword(s):  
Copper Content ◽  
Total Copper ◽  
Mining Soils

Reacted copper(II) concentrations in earlywood and latewood of micronized copper-treated Canadian softwood species

Holzforschung ◽  
2015 ◽  
Vol 69 (4) ◽  
pp. 509-512 ◽  
Author(s):  
Wei Xue ◽  
Pierre Kennepohl ◽  
John N.R. Ruddick
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Fluorescence Spectroscopy ◽  
Copper Content ◽  
Red Pine ◽  
Western Hemlock ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Total Copper ◽  
Electron Paramagnetic ◽  
Softwood Species

Abstract Electron paramagnetic resonance was used in conjunction with X-ray fluorescence spectroscopy to quantify total copper and reacted copper retentions in MCQ and MCA treated Canadian red pine sapwood and western hemlock heartwood. Total copper retentions were distinctly different between earlywood and latewood of both softwood species examined. Earlywood of red pine sapwood had higher total copper content than the latewood, while western hemlock heartwood had higher total copper contents in latewood than earlywood. The reacted copper concentrations were similar in earlywood and latewood, reflecting a similar capacity of each to solubilize and complex the reacted copper.

Total copper content and its distribution in acid vineyards soils developed from granitic rocks

2007 ◽  
Vol 378 (1-2) ◽  
pp. 23-27 ◽  
Author(s):  
Juan Carlos Nóvoa-Muñoz ◽  
José Manuel G. Queijeiro ◽  
Daniel Blanco-Ward ◽  
Cristalina Álvarez-Olleros ◽  
Antonio Martínez-Cortizas ◽  
...  
Keyword(s):  
Copper Content ◽  
Granitic Rocks ◽  
Total Copper

Involvement of a metallothionein-like copper complex in the mechanism of copper tolerance in Mimulus guttatus

1986 ◽  
Vol 227 (1249) ◽  
pp. 493-501 ◽  
Keyword(s):  
Copper Complex ◽  
Small Proportion ◽  
Copper Content ◽  
Copper Tolerance ◽  
Mimulus Guttatus ◽  
High Concentration ◽  
Tolerant Plants ◽  
Total Copper ◽  
Excess Copper ◽  
Copper Tolerant

The possible involvement of a metallothionein-like copper complex in the mechanism of copper tolerance in Mimulus guttatus has been examined. In the roots of copper-tolerant plants, after exposure to copper, a constant proportion of the total copper content is bound to this complex. The complex is present in the roots of both copper-tolerant and non-tolerant plants, and is also induced in the roots of both by increased exposure to copper. Differences in the amount of the complex in the roots of copper-tolerant and non-tolerant plants suggest that it may be involved in the mechanism of copper tolerance. However, only a small proportion (6%) of the copper in the roots of the copper-tolerant clone is bound to the complex after growth in a high concentration (16 μm) of copper; this result suggests that the mechanism of tolerance does not simply involve the sequestration of all excess copper by the complex. The complex may have a transient function in the mechanism of copper tolerance.

scholarly journals The Influence of Olive Orchards Copper-Based Fungicide Use, in Soils and Sediments—The Case of Aetoliko (Etoliko) Lagoon Western Greece

Geosciences ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 267
Author(s):  
Pavlos Avramidis ◽  
Pantelis Barouchas ◽  
Thomas Dünwald ◽  
Ingmar Unkel ◽  
Dionisios Panagiotaras
Keyword(s):  
Copper Content ◽  
Threshold Value ◽  
Carbonate Content ◽  
Toxicity Screening ◽  
Average Value ◽  
Total Copper ◽  
Soils And Sediments ◽  
Total Digestion ◽  
Lagoon Sediments ◽  
Geochemical Analyses

In this study, soil and aquatic sediments were sampled in the Aetoliko Lagoon and its catchment area, which is exclusively dominated by olive orchards. For the first time in Greece, soil as well as sediments samples of one coherent protected aquatic ecosystem were directly compared. In order to determine the influence that the usage of copper-based fungicides have on the lagoon sediments and on the soils of the surrounding area, twenty five (25) soil samples from different olive orchards that are bordering the water body and ten (10) sediment samples from the bottom of the lagoon were taken. The samples were analyzed for total copper content (total digestion) and extractable copper (diethylenetriaminepenta acetic acid, DTPA, extraction method). Furthermore, soil/sedimentological and geochemical analyses such as pH, grain size, total organic carbon, total sulfur, total nitrogen, and calcium carbonate content were carried out. The results show that the total copper in soils ranges from 58.37 to 671.33 mg kg−1. In addition the DTPA-extractable copper in soils has an average value of 45.00 mg kg−1. The average value of total copper in soils (286.24 mg kg−1) is higher than the threshold value for the Cu concentration (100 mg kg−1) set by the EU countries. Total copper content in the lagoon sediments is lower than in soils and varies between 43.85 mg kg−1 and 71.87 mg kg−1. The DTPA-extractable copper in sediments is in low ranges from 0.14 to 0.60 mg kg−1. On average, the total copper value for the lagoon sediments (55.93 mg kg−1) exceeds the Toxicity Screening Value (25.20 mg kg−1) for Cu in freshwater sediments. From the present study, it is clear that, although the copper in soils of the surrounding lagoon area exceeds the threshold limit for ecological risk, the lagoon sediments are influenced in a smaller degree. Our study can be used as a valuable reference and baseline for future studies on the environmental monitoring of the Aetoliko lagoon, as well as for studies in similar ecosystems.

scholarly journals COX19 mediates the transduction of a mitochondrial redox signal from SCO1 that regulates ATP7A-mediated cellular copper efflux

2013 ◽  
Vol 24 (6) ◽  
pp. 683-691 ◽  
Author(s):  
Scot C. Leary ◽  
Paul A. Cobine ◽  
Tamiko Nishimura ◽  
Robert M. Verdijk ◽  
Ronald de Krijger ◽  
...  
Keyword(s):  
Copper Content ◽  
Copper Deficiency ◽  
Copper Ions ◽  
Dependent Manner ◽  
Copper Binding ◽  
Catalytic Core ◽  
Total Copper ◽  
Cellular Copper ◽  
Combined Deficiency ◽  
Copper Overload

SCO1 and SCO2 are metallochaperones whose principal function is to add two copper ions to the catalytic core of cytochrome c oxidase (COX). However, affected tissues of SCO1 and SCO2 patients exhibit a combined deficiency in COX activity and total copper content, suggesting additional roles for these proteins in the regulation of cellular copper homeostasis. Here we show that both the redox state of the copper-binding cysteines of SCO1 and the abundance of SCO2 correlate with cellular copper content and that these relationships are perturbed by mutations in SCO1 or SCO2, producing a state of apparent copper overload. The copper deficiency in SCO patient fibroblasts is rescued by knockdown of ATP7A, a trans-Golgi, copper-transporting ATPase that traffics to the plasma membrane during copper overload to promote efflux. To investigate how a signal from SCO1 could be relayed to ATP7A, we examined the abundance and subcellular distribution of several soluble COX assembly factors. We found that COX19 partitions between mitochondria and the cytosol in a copper-dependent manner and that its knockdown partially rescues the copper deficiency in patient cells. These results demonstrate that COX19 is necessary for the transduction of a SCO1-dependent mitochondrial redox signal that regulates ATP7A-mediated cellular copper efflux.

INTRACELLULAR DISTRIBUTION OF COPPER IN THE LIVER OF THE RAT

1967 ◽  
Vol 45 (12) ◽  
pp. 1841-1851 ◽  
Author(s):  
G. Gregoriadis ◽  
T. L. Sourkes
Keyword(s):  
Copper Content ◽  
Copper Deficiency ◽  
Physiological State ◽  
Intracellular Distribution ◽  
Subcellular Fractions ◽  
Absolute Amount ◽  
Newborn Rat ◽  
Adult Rat ◽  
Total Copper ◽  
Minor Losses

The absolute amount of copper in whole liver and its subcellular fractions decreases as the rat matures. The decrease in mitochondrial and nuclear fractions, which contain most of the copper in the liver of the newborn rat, is much greater than the decrease in the soluble and microsomal fractions. This results in a redistribution of the copper, in favor of the supernatant. In the adult rat, this fraction is about one-half the total copper content of the liver, with the content of nuclei, mitochondria, and microsomes following in that order. The intraperitoneal injection of copper sulfate or the feeding of a diet low in copper brings the copper content of the liver above and below normal levels, respectively, and affects the intracellular distribution as follows. In copper loading, mitochondria and nuclei hold most of the excess and the cytoplasm and microsomes accumulate much less. In copper deficiency, there is a greater loss of soluble and mitochondrial copper and there are minor losses in microsomes and nuclei. The copper concentration in subcellular fractions of the liver seems to be related to the total copper content of the organ rather than to the physiological state of the animal.

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