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Jesus Arenas - One of the best experts on this subject based on the ideXlab platform.
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xas and microscopy studies of the uptake and bio transformation of copper in larrea tridentata creosote bush
Microchemical Journal, 2000Co-Authors: Lori A. Polette, J L Gardeatorresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are <10 μm they may enter the leaf by respiration through the plant ‘stomata’ that have openings between 5 μm and 10 μm. As such, creosote may be a natural bio-indicator for airborne particulates that are <10 μm.
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XAS and microscopy studies of the uptake and bio-transformation of copper in Larrea tridentata (creosote bush)
Microchemical Journal, 2000Co-Authors: Lori A. Polette, Jorge L. Gardea-torresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are
Lori A. Polette - One of the best experts on this subject based on the ideXlab platform.
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xas and microscopy studies of the uptake and bio transformation of copper in larrea tridentata creosote bush
Microchemical Journal, 2000Co-Authors: Lori A. Polette, J L Gardeatorresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are <10 μm they may enter the leaf by respiration through the plant ‘stomata’ that have openings between 5 μm and 10 μm. As such, creosote may be a natural bio-indicator for airborne particulates that are <10 μm.
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XAS and microscopy studies of the uptake and bio-transformation of copper in Larrea tridentata (creosote bush)
Microchemical Journal, 2000Co-Authors: Lori A. Polette, Jorge L. Gardea-torresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are
Ingrid J. Pickering - One of the best experts on this subject based on the ideXlab platform.
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xas and microscopy studies of the uptake and bio transformation of copper in larrea tridentata creosote bush
Microchemical Journal, 2000Co-Authors: Lori A. Polette, J L Gardeatorresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are <10 μm they may enter the leaf by respiration through the plant ‘stomata’ that have openings between 5 μm and 10 μm. As such, creosote may be a natural bio-indicator for airborne particulates that are <10 μm.
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XAS and microscopy studies of the uptake and bio-transformation of copper in Larrea tridentata (creosote bush)
Microchemical Journal, 2000Co-Authors: Lori A. Polette, Jorge L. Gardea-torresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are
Russell R. Chianelli - One of the best experts on this subject based on the ideXlab platform.
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xas and microscopy studies of the uptake and bio transformation of copper in larrea tridentata creosote bush
Microchemical Journal, 2000Co-Authors: Lori A. Polette, J L Gardeatorresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are <10 μm they may enter the leaf by respiration through the plant ‘stomata’ that have openings between 5 μm and 10 μm. As such, creosote may be a natural bio-indicator for airborne particulates that are <10 μm.
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XAS and microscopy studies of the uptake and bio-transformation of copper in Larrea tridentata (creosote bush)
Microchemical Journal, 2000Co-Authors: Lori A. Polette, Jorge L. Gardea-torresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are
Graham N. George - One of the best experts on this subject based on the ideXlab platform.
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xas and microscopy studies of the uptake and bio transformation of copper in larrea tridentata creosote bush
Microchemical Journal, 2000Co-Authors: Lori A. Polette, J L Gardeatorresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are <10 μm they may enter the leaf by respiration through the plant ‘stomata’ that have openings between 5 μm and 10 μm. As such, creosote may be a natural bio-indicator for airborne particulates that are <10 μm.
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XAS and microscopy studies of the uptake and bio-transformation of copper in Larrea tridentata (creosote bush)
Microchemical Journal, 2000Co-Authors: Lori A. Polette, Jorge L. Gardea-torresdey, Russell R. Chianelli, Graham N. George, Ingrid J. Pickering, Jesus ArenasAbstract:Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 μm (scanning electron microscopy), less than 10 μm (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and Transports it to the leaves where copper is found as Cu(I) and Cu(II). The Transport Agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are
