The Experts below are selected from a list of 2925 Experts worldwide ranked by ideXlab platform

Sergey Shabala - One of the best experts on this subject based on the ideXlab platform.

  • microsensors in plant biology in vivo visualization of Inorganic Analytes with high spatial and or temporal resolution
    Journal of Experimental Botany, 2020
    Co-Authors: Ole Pedersen, Niels Peter Revsbech, Sergey Shabala
    Abstract:

    This Expert View provides an update on the recent development of new microsensors, and briefly summarizes some novel applications of existing microsensors, in plant biology research. Two major topics are covered: (i) sensors for gaseous Analytes (O2, CO2, and H2S); and (ii) those for measuring concentrations and fluxes of ions (macro- and micronutrients and environmental pollutants such as heavy metals). We show that application of such microsensors may significantly advance understanding of mechanisms of plant-environmental interaction and regulation of plant developmental and adaptive responses under adverse environmental conditions via non-destructive visualization of key Analytes with high spatial and/or temporal resolution. Examples included cover a broad range of environmental situations including hypoxia, salinity, and heavy metal toxicity. We highlight the power of combining microsensor technology with other advanced biophysical (patch-clamp, voltage-clamp, and single-cell pressure probe), imaging (MRI and fluorescent dyes), and genetic techniques and approaches. We conclude that future progress in the field may be achieved by applying existing microsensors for important signalling molecules such as NO and H2O2, by improving selectivity of existing microsensors for some key Analytes (e.g. Na, Mg, and Zn), and by developing new microsensors for P.

  • Microsensors in plant biology: In vivo visualization of Inorganic Analytes with high spatial and/or temporal resolution
    Journal of experimental botany, 2020
    Co-Authors: Ole Pedersen, Niels Peter Revsbech, Sergey Shabala
    Abstract:

    This Expert View provides an update on the recent development of new microsensors, and briefly summarizes some novel applications of existing microsensors, in plant biology research. Two major topics are covered: (i) sensors for gaseous Analytes (O2, CO2, and H2S); and (ii) those for measuring concentrations and fluxes of ions (macro- and micronutrients and environmental pollutants such as heavy metals). We show that application of such microsensors may significantly advance understanding of mechanisms of plant-environmental interaction and regulation of plant developmental and adaptive responses under adverse environmental conditions via non-destructive visualization of key Analytes with high spatial and/or temporal resolution. Examples included cover a broad range of environmental situations including hypoxia, salinity, and heavy metal toxicity. We highlight the power of combining microsensor technology with other advanced biophysical (patch-clamp, voltage-clamp, and single-cell pressure probe), imaging (MRI and fluorescent dyes), and genetic techniques and approaches. We conclude that future progress in the field may be achieved by applying existing microsensors for important signalling molecules such as NO and H2O2, by improving selectivity of existing microsensors for some key Analytes (e.g. Na, Mg, and Zn), and by developing new microsensors for P.

Nedio Oleszczuk - One of the best experts on this subject based on the ideXlab platform.

  • application of polyurethane foam as a sorbent for trace metal pre concentration a review
    Spectrochimica Acta Part B: Atomic Spectroscopy, 2007
    Co-Authors: Valfredo Azevedo Lemos, Marcilane Da Silva Santos, Elenir Souza Santos, Mario Santos, W Dos N L Santos, Anderson Santos Souza, De Jesus, C Das F Virgens, Marcelo Souza De Carvalho, Nedio Oleszczuk
    Abstract:

    The first publication on the use of polyurethane foam (PUF) for sorption processes dates back to 1970, and soon after the material was applied for separation processes. The application of PUF as a sorbent for solid phase extraction of Inorganic Analytes for separation and pre-concentration purposes is reviewed. The physical and chemical characteristics of PUF (polyether and polyester type) are discussed and an introduction to the characterization of these sorption processes using different types of isotherms is given. Separation and pre-concentration methods using unloaded and loaded PUF in batch and on-line procedures with continuous flow and flow injection systems are presented. Methods for the direct solid sampling analysis of the PUF after pre-concentration are discussed as well as approaches for speciation analysis. Thermodynamic proprieties of some extraction processes are evaluated and the interpretation of determined parameters, such as enthalpy, entropy and Gibbs free energy in light of the physico-chemical processes is explained.

  • Application of polyurethane foam as a sorbent for trace metal pre-concentration — A review
    Spectrochimica Acta Part B: Atomic Spectroscopy, 2007
    Co-Authors: Valfredo Azevedo Lemos, Elenir Souza Santos, Anderson Santos Souza, C Das F Virgens, Marcelo Souza De Carvalho, Moacy Selis Santos, Márcio Souza Santos, W. N. L. Dos Santos, D.s. De Jesus, Nedio Oleszczuk
    Abstract:

    The first publication on the use of polyurethane foam (PUF) for sorption processes dates back to 1970, and soon after the material was applied for separation processes. The application of PUF as a sorbent for solid phase extraction of Inorganic Analytes for separation and pre-concentration purposes is reviewed. The physical and chemical characteristics of PUF (polyether and polyester type) are discussed and an introduction to the characterization of these sorption processes using different types of isotherms is given. Separation and pre-concentration methods using unloaded and loaded PUF in batch and on-line procedures with continuous flow and flow injection systems are presented. Methods for the direct solid sampling analysis of the PUF after pre-concentration are discussed as well as approaches for speciation analysis. Thermodynamic proprieties of some extraction processes are evaluated and the interpretation of determined parameters, such as enthalpy, entropy and Gibbs free energy in light of the physico-chemical processes is explained.

Ole Pedersen - One of the best experts on this subject based on the ideXlab platform.

  • microsensors in plant biology in vivo visualization of Inorganic Analytes with high spatial and or temporal resolution
    Journal of Experimental Botany, 2020
    Co-Authors: Ole Pedersen, Niels Peter Revsbech, Sergey Shabala
    Abstract:

    This Expert View provides an update on the recent development of new microsensors, and briefly summarizes some novel applications of existing microsensors, in plant biology research. Two major topics are covered: (i) sensors for gaseous Analytes (O2, CO2, and H2S); and (ii) those for measuring concentrations and fluxes of ions (macro- and micronutrients and environmental pollutants such as heavy metals). We show that application of such microsensors may significantly advance understanding of mechanisms of plant-environmental interaction and regulation of plant developmental and adaptive responses under adverse environmental conditions via non-destructive visualization of key Analytes with high spatial and/or temporal resolution. Examples included cover a broad range of environmental situations including hypoxia, salinity, and heavy metal toxicity. We highlight the power of combining microsensor technology with other advanced biophysical (patch-clamp, voltage-clamp, and single-cell pressure probe), imaging (MRI and fluorescent dyes), and genetic techniques and approaches. We conclude that future progress in the field may be achieved by applying existing microsensors for important signalling molecules such as NO and H2O2, by improving selectivity of existing microsensors for some key Analytes (e.g. Na, Mg, and Zn), and by developing new microsensors for P.

  • Microsensors in plant biology: In vivo visualization of Inorganic Analytes with high spatial and/or temporal resolution
    Journal of experimental botany, 2020
    Co-Authors: Ole Pedersen, Niels Peter Revsbech, Sergey Shabala
    Abstract:

    This Expert View provides an update on the recent development of new microsensors, and briefly summarizes some novel applications of existing microsensors, in plant biology research. Two major topics are covered: (i) sensors for gaseous Analytes (O2, CO2, and H2S); and (ii) those for measuring concentrations and fluxes of ions (macro- and micronutrients and environmental pollutants such as heavy metals). We show that application of such microsensors may significantly advance understanding of mechanisms of plant-environmental interaction and regulation of plant developmental and adaptive responses under adverse environmental conditions via non-destructive visualization of key Analytes with high spatial and/or temporal resolution. Examples included cover a broad range of environmental situations including hypoxia, salinity, and heavy metal toxicity. We highlight the power of combining microsensor technology with other advanced biophysical (patch-clamp, voltage-clamp, and single-cell pressure probe), imaging (MRI and fluorescent dyes), and genetic techniques and approaches. We conclude that future progress in the field may be achieved by applying existing microsensors for important signalling molecules such as NO and H2O2, by improving selectivity of existing microsensors for some key Analytes (e.g. Na, Mg, and Zn), and by developing new microsensors for P.

Valfredo Azevedo Lemos - One of the best experts on this subject based on the ideXlab platform.

  • application of polyurethane foam as a sorbent for trace metal pre concentration a review
    Spectrochimica Acta Part B: Atomic Spectroscopy, 2007
    Co-Authors: Valfredo Azevedo Lemos, Marcilane Da Silva Santos, Elenir Souza Santos, Mario Santos, W Dos N L Santos, Anderson Santos Souza, De Jesus, C Das F Virgens, Marcelo Souza De Carvalho, Nedio Oleszczuk
    Abstract:

    The first publication on the use of polyurethane foam (PUF) for sorption processes dates back to 1970, and soon after the material was applied for separation processes. The application of PUF as a sorbent for solid phase extraction of Inorganic Analytes for separation and pre-concentration purposes is reviewed. The physical and chemical characteristics of PUF (polyether and polyester type) are discussed and an introduction to the characterization of these sorption processes using different types of isotherms is given. Separation and pre-concentration methods using unloaded and loaded PUF in batch and on-line procedures with continuous flow and flow injection systems are presented. Methods for the direct solid sampling analysis of the PUF after pre-concentration are discussed as well as approaches for speciation analysis. Thermodynamic proprieties of some extraction processes are evaluated and the interpretation of determined parameters, such as enthalpy, entropy and Gibbs free energy in light of the physico-chemical processes is explained.

  • Application of polyurethane foam as a sorbent for trace metal pre-concentration — A review
    Spectrochimica Acta Part B: Atomic Spectroscopy, 2007
    Co-Authors: Valfredo Azevedo Lemos, Elenir Souza Santos, Anderson Santos Souza, C Das F Virgens, Marcelo Souza De Carvalho, Moacy Selis Santos, Márcio Souza Santos, W. N. L. Dos Santos, D.s. De Jesus, Nedio Oleszczuk
    Abstract:

    The first publication on the use of polyurethane foam (PUF) for sorption processes dates back to 1970, and soon after the material was applied for separation processes. The application of PUF as a sorbent for solid phase extraction of Inorganic Analytes for separation and pre-concentration purposes is reviewed. The physical and chemical characteristics of PUF (polyether and polyester type) are discussed and an introduction to the characterization of these sorption processes using different types of isotherms is given. Separation and pre-concentration methods using unloaded and loaded PUF in batch and on-line procedures with continuous flow and flow injection systems are presented. Methods for the direct solid sampling analysis of the PUF after pre-concentration are discussed as well as approaches for speciation analysis. Thermodynamic proprieties of some extraction processes are evaluated and the interpretation of determined parameters, such as enthalpy, entropy and Gibbs free energy in light of the physico-chemical processes is explained.

René Grieken - One of the best experts on this subject based on the ideXlab platform.

  • Fourier transform laser microprobe mass spectrometry for the molecular identification of Inorganic compounds
    Journal of the American Society for Mass Spectrometry, 1998
    Co-Authors: Herbert Struyf, Luc Vaeck, Katrien Poels, René Grieken
    Abstract:

    This study attempted to determine the molecular composition of Inorganic Analytes at the surface of solids by Fourier transform laser microprobe mass spectrometry (FT LMMS) with an external ion source. A database was established from the analysis of pure compounds. FT LMMS uses a similar ionization as the older LMMS instruments with time-of-flight (TOF) mass analyzer. However, apart from the mass resolution, the mass spectral patterns can be significantly different in FT LMMS compared to TOF LMMS. FT LMMS yields detailed information on the analyte by means of structural fragments, enabling us to specify the main building blocks, as well as adduct ions, consisting of the analyte molecule and a stable ion. Hence, deductive reasoning allows tentative characterization of the analogs without reference spectra, except for compounds with the same elements in different stoichiometries. In that case comparative data are needed.