Water Activity, pH and Density of Aqueous Amino Acids Solutions
The water activity, pH and density of some aqueous amino acid solutions were determined at 25 °C in three different types of solvents. Previous published experimental data on water activity and solubility of amino acids in aqueous solutions were used together with data from this work to test the app...
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| Veröffentlicht in: | Biotechnology progress 2001, Vol.17 (4), p.703-711 |
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| container_end_page | 711 |
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| container_title | Biotechnology progress |
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| creator | Ninni, Luciana Meirelles, Antonio J. A. |
| description | The water activity, pH and density of some aqueous amino acid solutions were determined at 25 °C in three different types of solvents. Previous published experimental data on water activity and solubility of amino acids in aqueous solutions were used together with data from this work to test the applicability of a group contribution model. The activity coefficients were estimated by the UNIFAC‐Larsen model combined with the Debye‐Hückel equation, taking also into account the partial dissociation phenomena of species in solution. Interaction energies between the charged species Na+ and Cl− and the specific groups of amino acids (COOH and NH2) were adjusted using experimental solubility data. |
| doi_str_mv | 10.1021/bp0100427 |
| format | Article |
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Interaction energies between the charged species Na+ and Cl− and the specific groups of amino acids (COOH and NH2) were adjusted using experimental solubility data.</description><identifier>ISSN: 8756-7938</identifier><identifier>EISSN: 1520-6033</identifier><identifier>DOI: 10.1021/bp0100427</identifier><identifier>PMID: 11485432</identifier><identifier>CODEN: BIPRET</identifier><language>eng</language><publisher>USA: American Chemical Society</publisher><subject>Amino Acids - chemistry ; Biological and medical sciences ; Biotechnology ; Buffers ; Electrolytes ; Fundamental and applied biological sciences. Psychology ; Hydrogen-Ion Concentration ; Methods. Procedures. 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A.</creatorcontrib><title>Water Activity, pH and Density of Aqueous Amino Acids Solutions</title><title>Biotechnology progress</title><addtitle>Biotechnol Progress</addtitle><description>The water activity, pH and density of some aqueous amino acid solutions were determined at 25 °C in three different types of solvents. Previous published experimental data on water activity and solubility of amino acids in aqueous solutions were used together with data from this work to test the applicability of a group contribution model. The activity coefficients were estimated by the UNIFAC‐Larsen model combined with the Debye‐Hückel equation, taking also into account the partial dissociation phenomena of species in solution. Interaction energies between the charged species Na+ and Cl− and the specific groups of amino acids (COOH and NH2) were adjusted using experimental solubility data.</description><subject>Amino Acids - chemistry</subject><subject>Biological and medical sciences</subject><subject>Biotechnology</subject><subject>Buffers</subject><subject>Electrolytes</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Hydrogen-Ion Concentration</subject><subject>Methods. Procedures. 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Psychology</topic><topic>Hydrogen-Ion Concentration</topic><topic>Methods. Procedures. Technologies</topic><topic>Models, Chemical</topic><topic>Others</topic><topic>Solubility</topic><topic>Solutions</topic><topic>Thermodynamics</topic><topic>Various methods and equipments</topic><topic>Water</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ninni, Luciana</creatorcontrib><creatorcontrib>Meirelles, Antonio J. 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| ispartof | Biotechnology progress, 2001, Vol.17 (4), p.703-711 |
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| language | eng |
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| source | MEDLINE; Wiley Blackwell Journals |
| subjects | Amino Acids - chemistry Biological and medical sciences Biotechnology Buffers Electrolytes Fundamental and applied biological sciences. Psychology Hydrogen-Ion Concentration Methods. Procedures. Technologies Models, Chemical Others Solubility Solutions Thermodynamics Various methods and equipments Water |
| title | Water Activity, pH and Density of Aqueous Amino Acids Solutions |
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