The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Eli Korin - One of the best experts on this subject based on the ideXlab platform.
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the vapour pressures over saturated aqueous solutions of dl 2 aminobutyric acid 4 aminobutyric acid Sodium d Gluconate Sodium hippurate and potassium magnesium l aspartate
The Journal of Chemical Thermodynamics, 2008Co-Authors: Alexander Apelblat, Eli KorinAbstract:Abstract Vapour pressures of water over saturated solutions of dl -2-aminobutyric acid, 4-aminobutyric acid, Sodium- d -Gluconate, Sodium hippurate, and potassium magnesium- l -aspartate were determined over the (278 to 322) K temperature range. The determined vapour pressures were used to obtain the water activities, the molar enthalpies of vaporization, and the osmotic coefficients of Sodium- d -Gluconate.
Alexander Apelblat - One of the best experts on this subject based on the ideXlab platform.
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the vapour pressures over saturated aqueous solutions of dl 2 aminobutyric acid 4 aminobutyric acid Sodium d Gluconate Sodium hippurate and potassium magnesium l aspartate
The Journal of Chemical Thermodynamics, 2008Co-Authors: Alexander Apelblat, Eli KorinAbstract:Abstract Vapour pressures of water over saturated solutions of dl -2-aminobutyric acid, 4-aminobutyric acid, Sodium- d -Gluconate, Sodium hippurate, and potassium magnesium- l -aspartate were determined over the (278 to 322) K temperature range. The determined vapour pressures were used to obtain the water activities, the molar enthalpies of vaporization, and the osmotic coefficients of Sodium- d -Gluconate.
Mohsen Ben Haha - One of the best experts on this subject based on the ideXlab platform.
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Effect of retarders on the early hydration of calcium-sulpho-aluminate (CSA) type cements
Cement and Concrete Research, 2016Co-Authors: Maciej Zajac, Jan Skocek, Frank Bullerjahn, Mohsen Ben HahaAbstract:Abstract The retardation of calcium-sulpho-aluminate (CSA) type cements by three common retarders—Sodium Gluconate, Sodium–potassium tartrate and borax is investigated at a 2% addition rate. Each of the retarders has a different effect on the early-age hydrate assemblage, as shown by quantitative X-ray diffraction, thermogravimetric analysis, scanning electron microscopy and pore solution analysis. Regardless of the retarder used, the hydration starts with mainly the dissolution of ready soluble (calcium) alkali sulphates and ye'elimite, followed by the formation of ettringite and aluminium hydroxide, whereby the specific clinker mineral dissolution as well as ettringite-forming reaction is delayed in different ways depending on the retarder used. The results showed that the retardation is mainly caused by preventing hydrates formation in the case of tartrate and Gluconate. Contrary, borax retards the hydration by preventing to a certain extent the dissolution of ye'elimite and lowers the initial pH. Furthermore, the morphology of ettringite is altered depending on the type of the retarder used.
L E Metzger - One of the best experts on this subject based on the ideXlab platform.
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effect of Sodium Gluconate on the solubility of calcium lactate
Journal of Dairy Science, 2011Co-Authors: C Phadungath, L E MetzgerAbstract:Abstract Calcium and lactate are present in excess of their solubility in Cheddar cheese. Consequently, calcium lactate crystals (CLC) are a common defect in Cheddar cheese. A novel approach for preventing CLC is the addition of Sodium Gluconate. Sodium Gluconate has the potential to increase the solubility of calcium and lactate by forming soluble complexes with calcium and lactate ions, and preventing them from being available for the formation of CLC. The objective of this study was to determine if Sodium Gluconate could increase the solubility of calcium lactate (CaL 2 ). Seven CaL 2 solutions (5.31% wt/wt) with 7 levels of Sodium Gluconate (0, 0.5, 1, 1.5, 2, 3, and 4% wt/wt) were made in triplicate. Solutions were stored at 7°C for 21 d, and were visually inspected for CLC formation. Subsequently, they were filtered to remove CLC and the supernatant was analyzed for lactic acid and gluconic acid by HPLC and for calcium by atomic absorption spectroscopy. The visual inspection demonstrated that CLC were formed in the solution with 0% Gluconate after the first day of storage and CLC continued to accumulate over time. A minute amount of CLC was also visible in the solution with 0.5% Gluconate after 21 d of storage, whereas CLC were not visible in the other solutions. The HPLC results indicated a higher concentration of calcium and lactic acid in the filtrate from the solutions containing added Gluconate. Thus, Sodium Gluconate can increase the solubility of CaL 2 .
Maciej Zajac - One of the best experts on this subject based on the ideXlab platform.
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Effect of retarders on the early hydration of calcium-sulpho-aluminate (CSA) type cements
Cement and Concrete Research, 2016Co-Authors: Maciej Zajac, Jan Skocek, Frank Bullerjahn, Mohsen Ben HahaAbstract:Abstract The retardation of calcium-sulpho-aluminate (CSA) type cements by three common retarders—Sodium Gluconate, Sodium–potassium tartrate and borax is investigated at a 2% addition rate. Each of the retarders has a different effect on the early-age hydrate assemblage, as shown by quantitative X-ray diffraction, thermogravimetric analysis, scanning electron microscopy and pore solution analysis. Regardless of the retarder used, the hydration starts with mainly the dissolution of ready soluble (calcium) alkali sulphates and ye'elimite, followed by the formation of ettringite and aluminium hydroxide, whereby the specific clinker mineral dissolution as well as ettringite-forming reaction is delayed in different ways depending on the retarder used. The results showed that the retardation is mainly caused by preventing hydrates formation in the case of tartrate and Gluconate. Contrary, borax retards the hydration by preventing to a certain extent the dissolution of ye'elimite and lowers the initial pH. Furthermore, the morphology of ettringite is altered depending on the type of the retarder used.