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Ryszard Lobinski - One of the best experts on this subject based on the ideXlab platform.
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Determination of Zn–, Cu– and Mn–Glycinate complexes in feed samples and in-vitro and in-vivo assays to assess their bioaccessibility in feed samples
Talanta, 2013Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, Ryszard LobinskiAbstract:A method was developed for the quantification of Zn-, Cu- and Mn-Glycinates in supplemented feed samples. The coupling of capillary electrophoresis (CE) with ICP MS detection after purification of the extract by ultrafiltration was shown to be efficient for the quantitative recovery of Glycinates. The method developed was then applied to evaluate the bioaccessibility of Glycinates using a sequential enzymolysis approach. The data obtained indicated a strong bioaccessibility of each element (79-94%). A new complex was also found to be formed during the digestion process. Bioavailability was then evaluated by analyzing plasma samples of horses supplemented with Glycinates-rich feed. Intact Glycinates could not be detected in plasma samples but a Cu-containing molecule was found more abundant after CuGly treatment.
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characterization of metal Glycinate complexes by electrospray q tof ms ms and their determination by capillary electrophoresis icp ms application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n = 1 to n = 4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 µg mL−1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%.
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Characterization of metal Glycinate complexes by electrospray Q-TOF-MS/MS and their determination by capillary electrophoresis-ICP-MS: Application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO 4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n∈=∈1 to n∈=∈4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 μg mL-1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%. © 2010 Springer-Verlag.
Hideto Matsuyama - One of the best experts on this subject based on the ideXlab platform.
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Effect of the amino-group densities of functionalized ionic liquids on the facilitated transport properties for CO2 separation
Journal of Membrane Science, 2016Co-Authors: Shohei Kasahara, Eiji Kamio, Abdul Rajjak Shaikh, Tatsuya Matsuki, Hideto MatsuyamaAbstract:Abstract Amino acid ionic liquids (AAILs) composed of different sizes and numbers of amino groups, including tetrabutylammonium Glycinate, tetramethylammonium Glycinate, and 1,1,1-trimethylhydrazinium Glycinate, were synthesized as CO 2 carriers for facilitated transport membranes. The physical properties of the fabricated AAILs, such as density, viscosity, and N 2 and CO 2 absorption capacities, were measured, and the fractional free volume was calculated using molecular dynamics (MD) simulations. The results showed that the molar and fractional free volumes decreased with decreasing AAIL size, which caused increased CO 2 absorption and decreased N 2 absorption. In addition, the CO 2 absorption increased with higher numbers of amino groups in the AAILs. The gas permeation properties of facilitated transport membranes containing the synthesized AAILs were investigated. The small AAILs with two amino groups showed better CO 2 permeability and N 2 barrier properties under humid conditions. We propose that ionic liquids optimized as CO 2 carriers for facilitated transport membranes under humid conditions should have high amino-group density, which could be realized by decreasing the molecular size and introducing more amino groups in the molecule.
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effects of water concentration on the free volume of amino acid ionic liquids investigated by molecular dynamics simulations
Journal of Physical Chemistry B, 2015Co-Authors: Abdul Rajjak Shaikh, Eiji Kamio, Hiromitsu Takaba, Hideto MatsuyamaAbstract:Amino acid ionic liquids (AAILs) are gaining attention because of their potential in CO2 capture technology. Molecular dynamics simulations of AAILs tetramethylammonium Glycinate ([N1111][Gly]), tetrabutylammonium Glycinate ([N4444][Gly]), and 1,1,1-trimethylhydrazinium Glycinate ([aN111][Gly]) and their corresponding mixtures with water were performed to investigate the effect of water concentration on the cation–anion interactions. The water content significantly influenced the free volume (FV) and fractional free volume (FFV) of the AAILs that varied with the hydrophobic and hydrophilic nature of the ion pairs. Under dry conditions, the FFV increased with increasing cation molecular sizes, indicative of proportional adsorption of any inert gases, such as N2, as consistent with experimental observations. Furthermore, the polarity of the cation played an important role in FFV and hence the diffusion of the AAILs. Density functional theory calculations suggested that hydrophilic [aN111][Gly] featured stro...
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improvements in the co2 permeation selectivities of amino acid ionic liquid based facilitated transport membranes by controlling their gas absorption properties
Journal of Membrane Science, 2014Co-Authors: Shohei Kasahara, Eiji Kamio, Hideto MatsuyamaAbstract:A series of amino acid ionic liquids (AAILs) composed of different cations of different sizes, including trihexyl(tetradecyl)phosphonium Glycinate, tetrabutylphosphonium Glycinate and triethyl(pentyl)phosphonium Glycinate have been synthesized for the carrier of CO2 facilitated transport membrane. Their physical properties, including their viscosity, density, molar volume and N2 absorption amount were investigated. The amount of N2 absorption decreased as the size of the cation of the AAIL decreased. Facilitated transport membranes containing these AAILs were prepared, and their CO2 and N2 permeabilities were measured. The N2 permeabilities were systematically investigated both experimentally and theoretically with the aim of improving the selectivity of the CO2 permeation of the AAIL-based facilitated transport membrane. As expected, the CO2 permselectivity was improved using triethyl(pentyl)phosphonium Glycinate, which contained the smallest cation of the AAILs investigated in this study. We have proposed a methodology for improving the CO2 selectivity of AAIL-based facilitated transport membranes based on reducing their N2 permeabilities.
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Fundamental Investigation of the Factors Controlling the CO2 Permeability of Facilitated Transport Membranes Containing Amine-Functionalized Task-Specific Ionic Liquids
Industrial & Engineering Chemistry Research, 2014Co-Authors: Shohei Kasahara, Eiji Kamio, Akihito Otani, Hideto MatsuyamaAbstract:Task-specific ionic liquid (IL)-based facilitated transport membranes were prepared with tetrabutylphosphonium amine-functionalized Glycinate or 2-cyanopyrrolide ILs. CO2 permeabilities and viscosity and CO2 absorbance of ILs were evaluated. Viscosities of Glycinate- or methylGlycinate-containing ILs drastically increased with CO2 absorption, probably from hydrogen bonding between their CO2 complexes. The temperature dependence of the CO2 permeability of the IL-based membranes was opposite to that of the viscosity of the corresponding ILs. The CO2 permeability at low temperature under dry conditions was improved by using tetrabutylphosphonium 2-cyanopyrrolide, which barely forms hydrogen bonds among its CO2 complexes. However, above 363 K, the tetrabutylphosphonium 2-cyanopyrrolide-based membrane had a lower CO2 permeability than the tetrabutylphosphonium Glycinate-based membrane because tetrabutylphosphonium 2-cyanopyrrolide absorbed less CO2. The major factors controlling CO2 permeability of task-specif...
Veronique Vacchina - One of the best experts on this subject based on the ideXlab platform.
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Determination of Zn–, Cu– and Mn–Glycinate complexes in feed samples and in-vitro and in-vivo assays to assess their bioaccessibility in feed samples
Talanta, 2013Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, Ryszard LobinskiAbstract:A method was developed for the quantification of Zn-, Cu- and Mn-Glycinates in supplemented feed samples. The coupling of capillary electrophoresis (CE) with ICP MS detection after purification of the extract by ultrafiltration was shown to be efficient for the quantitative recovery of Glycinates. The method developed was then applied to evaluate the bioaccessibility of Glycinates using a sequential enzymolysis approach. The data obtained indicated a strong bioaccessibility of each element (79-94%). A new complex was also found to be formed during the digestion process. Bioavailability was then evaluated by analyzing plasma samples of horses supplemented with Glycinates-rich feed. Intact Glycinates could not be detected in plasma samples but a Cu-containing molecule was found more abundant after CuGly treatment.
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characterization of metal Glycinate complexes by electrospray q tof ms ms and their determination by capillary electrophoresis icp ms application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n = 1 to n = 4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 µg mL−1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%.
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Characterization of metal Glycinate complexes by electrospray Q-TOF-MS/MS and their determination by capillary electrophoresis-ICP-MS: Application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO 4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n∈=∈1 to n∈=∈4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 μg mL-1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%. © 2010 Springer-Verlag.
Catherine Ionescu - One of the best experts on this subject based on the ideXlab platform.
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Determination of Zn–, Cu– and Mn–Glycinate complexes in feed samples and in-vitro and in-vivo assays to assess their bioaccessibility in feed samples
Talanta, 2013Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, Ryszard LobinskiAbstract:A method was developed for the quantification of Zn-, Cu- and Mn-Glycinates in supplemented feed samples. The coupling of capillary electrophoresis (CE) with ICP MS detection after purification of the extract by ultrafiltration was shown to be efficient for the quantitative recovery of Glycinates. The method developed was then applied to evaluate the bioaccessibility of Glycinates using a sequential enzymolysis approach. The data obtained indicated a strong bioaccessibility of each element (79-94%). A new complex was also found to be formed during the digestion process. Bioavailability was then evaluated by analyzing plasma samples of horses supplemented with Glycinates-rich feed. Intact Glycinates could not be detected in plasma samples but a Cu-containing molecule was found more abundant after CuGly treatment.
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characterization of metal Glycinate complexes by electrospray q tof ms ms and their determination by capillary electrophoresis icp ms application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n = 1 to n = 4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 µg mL−1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%.
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Characterization of metal Glycinate complexes by electrospray Q-TOF-MS/MS and their determination by capillary electrophoresis-ICP-MS: Application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO 4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n∈=∈1 to n∈=∈4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 μg mL-1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%. © 2010 Springer-Verlag.
Sebastien Oguey - One of the best experts on this subject based on the ideXlab platform.
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Determination of Zn–, Cu– and Mn–Glycinate complexes in feed samples and in-vitro and in-vivo assays to assess their bioaccessibility in feed samples
Talanta, 2013Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, Ryszard LobinskiAbstract:A method was developed for the quantification of Zn-, Cu- and Mn-Glycinates in supplemented feed samples. The coupling of capillary electrophoresis (CE) with ICP MS detection after purification of the extract by ultrafiltration was shown to be efficient for the quantitative recovery of Glycinates. The method developed was then applied to evaluate the bioaccessibility of Glycinates using a sequential enzymolysis approach. The data obtained indicated a strong bioaccessibility of each element (79-94%). A new complex was also found to be formed during the digestion process. Bioavailability was then evaluated by analyzing plasma samples of horses supplemented with Glycinates-rich feed. Intact Glycinates could not be detected in plasma samples but a Cu-containing molecule was found more abundant after CuGly treatment.
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characterization of metal Glycinate complexes by electrospray q tof ms ms and their determination by capillary electrophoresis icp ms application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n = 1 to n = 4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 µg mL−1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%.
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Characterization of metal Glycinate complexes by electrospray Q-TOF-MS/MS and their determination by capillary electrophoresis-ICP-MS: Application to premix samples
Analytical and Bioanalytical Chemistry, 2010Co-Authors: Veronique Vacchina, Sebastien Oguey, Catherine Ionescu, David Bravo, Ryszard LobinskiAbstract:A method was developed for the determination of metal complexes with glycine (Glycinates, [M(Gly)x(H2O)y(SO 4)z]n, where M denotes Zn, Cu, Mn and Fe) in premix samples used for the preparation of animal feeds enriched in essential trace elements. The method was based on the extraction of the Glycinates with 10 mM ammonium acetate (pH 7.4) followed by their determination using capillary electrophoresis with ICP MS detection. The stability of the Glycinates in solution was verified by electrospray TOF-MS. Each supplement was shown to be a mixture of complexes, with polymerization degrees ranging from n∈=∈1 to n∈=∈4 (depending on the metal), that were fully or partially dehydrated. The metal glycine complex moiety was found to be preserved during capillary electrophoresis. The detection limits, calculated as three times the standard deviation of the blank plus the blank, were between 0.05 and 0.2 μg mL-1 (as the metal), and the calibration curves were linear, allowing the analysis of premix samples. Repeatability for Glycinate standards was below 12%, and analytical precision was typically within 15%. © 2010 Springer-Verlag.