The Experts below are selected from a list of 32562 Experts worldwide ranked by ideXlab platform
Konstantin N Mikhelson - One of the best experts on this subject based on the ideXlab platform.
-
potentiometric estimation of the stability constants of ion ionophore complexes in ion selective membranes by the sandwich membrane method theory advantages and limitations
Analytical Chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
-
Potentiometric Estimation of the Stability Constants of Ion−Ionophore Complexes in Ion-Selective Membranes by the Sandwich Membrane Method: Theory, Advantages, and Limitations
Analytical chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
Mikhail M Shultz - One of the best experts on this subject based on the ideXlab platform.
-
potentiometric estimation of the stability constants of ion ionophore complexes in ion selective membranes by the sandwich membrane method theory advantages and limitations
Analytical Chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
-
Potentiometric Estimation of the Stability Constants of Ion−Ionophore Complexes in Ion-Selective Membranes by the Sandwich Membrane Method: Theory, Advantages, and Limitations
Analytical chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
Sergey B Mokrov - One of the best experts on this subject based on the ideXlab platform.
-
potentiometric estimation of the stability constants of ion ionophore complexes in ion selective membranes by the sandwich membrane method theory advantages and limitations
Analytical Chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
-
Potentiometric Estimation of the Stability Constants of Ion−Ionophore Complexes in Ion-Selective Membranes by the Sandwich Membrane Method: Theory, Advantages, and Limitations
Analytical chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
Olga K Stefanova - One of the best experts on this subject based on the ideXlab platform.
-
potentiometric estimation of the stability constants of ion ionophore complexes in ion selective membranes by the sandwich membrane method theory advantages and limitations
Analytical Chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
-
Potentiometric Estimation of the Stability Constants of Ion−Ionophore Complexes in Ion-Selective Membranes by the Sandwich Membrane Method: Theory, Advantages, and Limitations
Analytical chemistry, 2002Co-Authors: Mikhail M Shultz, Olga K Stefanova, Sergey B Mokrov, Konstantin N MikhelsonAbstract:Segmented sandwich membrane method of studying stoichiometry and stability constants of ion−ionophore complexes in ion-selective membranes is considered in detail. The experimental data (reported earlier in Russian) concerning complexes of various ions with valinomycin, with H+-selective neutral ionophore hexabutyltriamidophosphate, and with anion-binding neutral ionophore p-hexyl trifluoroacetylbenzoate is presented in a compact form. Advantages of titration technique in the sandwich membrane method (the presence of an Internal Criterion of reliability, and the possibility of direct determination of complex stoichiometry coefficients) are specially addressed. Biases of the estimates of the constants caused by ion-pair formation in real membranes and by diffusion potential are analyzed by means of computer simulations. The possibility of revealing two coexisting complexes with different compositions is also discussed.
Chris J Mace - One of the best experts on this subject based on the ideXlab platform.
-
Psychometric validation of the State Scale of Dissociation (SSD)
2015Co-Authors: Chris J MaceAbstract:Although dissociative phenomena are often transient features of mental states, existing measures of dissociation are designed to measure enduring traits. A new present-state self-report measure, sensitive to changes in dissociative states, was therefore devel-oped and psychometrically validated. Fifty-six items were formulated to measure state features, and sorted according to seven subscales: derealization, depersonalization, identity confusion, identity alteration, conversion, amnesia and hypermnesia. The State Scale of Dissociation (SSD) was administered with other psychiatric scales (DES, BDI, BAI, SCI-PANSS) to 130 participants with DSM-IV major depressive disorder schizo-phrenia, alcohol withdrawal, dissociative disorders and controls. In these sample populations, the SSD was demonstrated as a valid and reliable measure of changes in and the severity of dissociative states. Discriminant validity, content, concurrent, predictive, Internal Criterion-related, Internal construct and convergent validities, and Internal consistency and split-half reliability were con rmed statistically. Clinical observations of dissociative states, and their comorbidity with symptoms of depression and psychotic illness, were con rmed empirically. The SSD, an acceptable, valid and reliable scale measuring state features of dissociation at the time of completion, was obtained. This is a prerequisite for further investigation of correlations between changes in dissociative states and concurrent physiological parameters. The methodological value of examining both state and trait aspects of psychiatric disorders (Kraemer, Gullion, Rush, Frank, & Kupfer, 1994) has been demonstrated for various psychiatric disorders (Dettling et al., 1995; Schrader, 1994) and psychiatri
-
Psychometric validation of the State Scale of Dissociation (SSD).
Psychology and psychotherapy, 2002Co-Authors: Christa Kruger, Chris J MaceAbstract:Although dissociative phenomena are often transient features of mental states, existing measures of dissociation are designed to measure enduring traits. A new present-state self-report measure, sensitive to changes in dissociative states, was therefore developed and psychometrically validated. Fifty-six items were formulated to measure state features, and sorted according to seven subscales: derealization, depersonalization, identity confusion, identity alteration, conversion, amnesia and hypermnesia. The State Scale of Dissociation (SSD) was administered with other psychiatric scales (DES, BDI, BAI, SCI-PANSS) to 130 participants with DSM-IV major depressive disorder schizophrenia, alcohol withdrawal, dissociative disorders and controls. In these sample populations, the SSD was demonstrated as a valid and reliable measure of changes in and the severity of dissociative states. Discriminant validity, content, concurrent, predictive, Internal Criterion-related, Internal construct and convergent validities, and Internal consistency and split-half reliability were confirmed statistically. Clinical observations of dissociative states, and their comorbidity with symptoms of depression and psychotic illness, were confirmed empirically. The SSD, an acceptable, valid and reliable scale measuring state features of dissociation at the time of completion, was obtained. This is a prerequisite for further investigation of correlations between changes in dissociative states and concurrent physiological parameters.