The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
Juan Carlos Parajo - One of the best experts on this subject based on the ideXlab platform.
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recovery of antioxidants from industrial Waste Liquors using membranes and polymeric resins
Journal of Food Engineering, 2010Co-Authors: Beatriz Diazreinoso, Andres Moure, Herminia Dominguez, Noelia Gonzalezlopez, Juan Carlos ParajoAbstract:Abstract Liquors obtained by pressing distilled grape pomace were assayed for composition and antioxidant activity, and refined by different methods (adsorption–desorption or processing by ultrafiltration (UF) and nanofiltration (NF) membranes, followed by solvent extraction of concentrates and adsorption–desorption of permeates). Commercial polymeric resins (Sepabeads SP700) were employed in the adsorption step, and desorption was carried out with aqueous ethanol solutions. The final products presented ABTS radical scavenging capacities equivalent to 1.5–9.9 g of Trolox per gram of desorbed product, and DPPH radical scavenging capacities comparable to that of BHA, with reducing powers corresponding to 1.94–2.97 mM ascorbic acid.
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ultrafiltration of industrial Waste Liquors from the manufacture of soy protein concentrates
Journal of Chemical Technology & Biotechnology, 2006Co-Authors: Andres Moure, Herminia Dominguez, Juan Carlos ParajoAbstract:Protein-containing Waste Liquors from the manufacture of soy protein concentrates were processed by ultrafiltration to recover soluble protein using three different membranes (with molecular weight cut-offs of 10, 30 and 50 kDa). Operating at 20 °C under reversible conditions, the experimental data of the normalized permeate flux (NPF) obtained at various transmembrane pressures were well described by a model reported in the literature. For each membrane and transmembrane pressure, the values of the parameters involved in the model were calculated. Operating at selected transmembrane pressures, protein rejections of 0.705, 0.747 and 0.637 were determined for the 10, 30 and 50 kDa membranes, respectively. Operation with the 10 kDa membrane at temperatures in the range 30–50 °C and operation with the 30 or 50 kDa membranes at 40 or 50 °C resulted in hysteresis. Copyright © 2006 Society of Chemical Industry
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Fractionation and Enzymatic Hydrolysis of Soluble Protein Present in Waste Liquors from Soy Processing
Journal of Agricultural and Food Chemistry, 2005Co-Authors: Andres Moure, Herminia Dominguez, Juan Carlos ParajoAbstract:A Waste effluent from a soymeal concentrates plant was centrifuged and ultrafiltered by successive processing in membranes of 10, 30, and 50 kDa, with further concentration of the resulting stream using a 5 kDa membrane. The separated fractions (5−10, 10−30, 30−50, and >50 kDa) were subjected to chemical, nutritional, and functional characterization. Resuspension of the retentates in salt-containing systems improved the protein solubility, the emulsifying capacity, and the gelation capacity, whereas the emulsion stability and the foam capacity and stability decreased with respect to the values obtained using distilled water, and the oil absorption capacity was not affected. The digestibility of the fraction >50 kDa was comparable to that of casein. The fractions of higher molecular mass (30−50 and >50 kDa) were subjected to enzymatic hydrolysis with a commercial protease, to give products with improved emulsifying activity and stability, particularly for hydrolysates with a degree of hydrolysis between 20...
Andres Moure - One of the best experts on this subject based on the ideXlab platform.
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recovery of antioxidants from industrial Waste Liquors using membranes and polymeric resins
Journal of Food Engineering, 2010Co-Authors: Beatriz Diazreinoso, Andres Moure, Herminia Dominguez, Noelia Gonzalezlopez, Juan Carlos ParajoAbstract:Abstract Liquors obtained by pressing distilled grape pomace were assayed for composition and antioxidant activity, and refined by different methods (adsorption–desorption or processing by ultrafiltration (UF) and nanofiltration (NF) membranes, followed by solvent extraction of concentrates and adsorption–desorption of permeates). Commercial polymeric resins (Sepabeads SP700) were employed in the adsorption step, and desorption was carried out with aqueous ethanol solutions. The final products presented ABTS radical scavenging capacities equivalent to 1.5–9.9 g of Trolox per gram of desorbed product, and DPPH radical scavenging capacities comparable to that of BHA, with reducing powers corresponding to 1.94–2.97 mM ascorbic acid.
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ultrafiltration of industrial Waste Liquors from the manufacture of soy protein concentrates
Journal of Chemical Technology & Biotechnology, 2006Co-Authors: Andres Moure, Herminia Dominguez, Juan Carlos ParajoAbstract:Protein-containing Waste Liquors from the manufacture of soy protein concentrates were processed by ultrafiltration to recover soluble protein using three different membranes (with molecular weight cut-offs of 10, 30 and 50 kDa). Operating at 20 °C under reversible conditions, the experimental data of the normalized permeate flux (NPF) obtained at various transmembrane pressures were well described by a model reported in the literature. For each membrane and transmembrane pressure, the values of the parameters involved in the model were calculated. Operating at selected transmembrane pressures, protein rejections of 0.705, 0.747 and 0.637 were determined for the 10, 30 and 50 kDa membranes, respectively. Operation with the 10 kDa membrane at temperatures in the range 30–50 °C and operation with the 30 or 50 kDa membranes at 40 or 50 °C resulted in hysteresis. Copyright © 2006 Society of Chemical Industry
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Fractionation and Enzymatic Hydrolysis of Soluble Protein Present in Waste Liquors from Soy Processing
Journal of Agricultural and Food Chemistry, 2005Co-Authors: Andres Moure, Herminia Dominguez, Juan Carlos ParajoAbstract:A Waste effluent from a soymeal concentrates plant was centrifuged and ultrafiltered by successive processing in membranes of 10, 30, and 50 kDa, with further concentration of the resulting stream using a 5 kDa membrane. The separated fractions (5−10, 10−30, 30−50, and >50 kDa) were subjected to chemical, nutritional, and functional characterization. Resuspension of the retentates in salt-containing systems improved the protein solubility, the emulsifying capacity, and the gelation capacity, whereas the emulsion stability and the foam capacity and stability decreased with respect to the values obtained using distilled water, and the oil absorption capacity was not affected. The digestibility of the fraction >50 kDa was comparable to that of casein. The fractions of higher molecular mass (30−50 and >50 kDa) were subjected to enzymatic hydrolysis with a commercial protease, to give products with improved emulsifying activity and stability, particularly for hydrolysates with a degree of hydrolysis between 20...
Herminia Dominguez - One of the best experts on this subject based on the ideXlab platform.
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recovery of antioxidants from industrial Waste Liquors using membranes and polymeric resins
Journal of Food Engineering, 2010Co-Authors: Beatriz Diazreinoso, Andres Moure, Herminia Dominguez, Noelia Gonzalezlopez, Juan Carlos ParajoAbstract:Abstract Liquors obtained by pressing distilled grape pomace were assayed for composition and antioxidant activity, and refined by different methods (adsorption–desorption or processing by ultrafiltration (UF) and nanofiltration (NF) membranes, followed by solvent extraction of concentrates and adsorption–desorption of permeates). Commercial polymeric resins (Sepabeads SP700) were employed in the adsorption step, and desorption was carried out with aqueous ethanol solutions. The final products presented ABTS radical scavenging capacities equivalent to 1.5–9.9 g of Trolox per gram of desorbed product, and DPPH radical scavenging capacities comparable to that of BHA, with reducing powers corresponding to 1.94–2.97 mM ascorbic acid.
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ultrafiltration of industrial Waste Liquors from the manufacture of soy protein concentrates
Journal of Chemical Technology & Biotechnology, 2006Co-Authors: Andres Moure, Herminia Dominguez, Juan Carlos ParajoAbstract:Protein-containing Waste Liquors from the manufacture of soy protein concentrates were processed by ultrafiltration to recover soluble protein using three different membranes (with molecular weight cut-offs of 10, 30 and 50 kDa). Operating at 20 °C under reversible conditions, the experimental data of the normalized permeate flux (NPF) obtained at various transmembrane pressures were well described by a model reported in the literature. For each membrane and transmembrane pressure, the values of the parameters involved in the model were calculated. Operating at selected transmembrane pressures, protein rejections of 0.705, 0.747 and 0.637 were determined for the 10, 30 and 50 kDa membranes, respectively. Operation with the 10 kDa membrane at temperatures in the range 30–50 °C and operation with the 30 or 50 kDa membranes at 40 or 50 °C resulted in hysteresis. Copyright © 2006 Society of Chemical Industry
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Fractionation and Enzymatic Hydrolysis of Soluble Protein Present in Waste Liquors from Soy Processing
Journal of Agricultural and Food Chemistry, 2005Co-Authors: Andres Moure, Herminia Dominguez, Juan Carlos ParajoAbstract:A Waste effluent from a soymeal concentrates plant was centrifuged and ultrafiltered by successive processing in membranes of 10, 30, and 50 kDa, with further concentration of the resulting stream using a 5 kDa membrane. The separated fractions (5−10, 10−30, 30−50, and >50 kDa) were subjected to chemical, nutritional, and functional characterization. Resuspension of the retentates in salt-containing systems improved the protein solubility, the emulsifying capacity, and the gelation capacity, whereas the emulsion stability and the foam capacity and stability decreased with respect to the values obtained using distilled water, and the oil absorption capacity was not affected. The digestibility of the fraction >50 kDa was comparable to that of casein. The fractions of higher molecular mass (30−50 and >50 kDa) were subjected to enzymatic hydrolysis with a commercial protease, to give products with improved emulsifying activity and stability, particularly for hydrolysates with a degree of hydrolysis between 20...
Fangqin Cheng - One of the best experts on this subject based on the ideXlab platform.
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high efficiency leaching of valuable metals from saprolite laterite ore using pickling Waste liquor for synthesis of spinel type ferrites mfe2o4 with excellent magnetic properties
Journal of materials research and technology, 2021Co-Authors: Jian-ming Gao, Fangqin ChengAbstract:Abstract High-efficiency leaching of valuable metals from nickeliferous laterite ore for preparation of functional materials is one of the most important high-value utilization pathways. In this paper, facile preparation of multi-metal spinel-type ferrites (MFe2O4) from saprolite laterite ore after pickling Waste liquor leaching process was proposed. The effects of pickling Waste liquor leaching parameters including acid concentration, leaching temperature and time, liquid–solid ratio and iron ion concentration on leaching efficiency for Fe, Ni, Mg, Mn and Co from saprolite laterite ore and the molar ratio (RFe/M) of iron ions to divalent metal ions such as Ni2+, Mn2+, Mg2+, etc. in the leach Liquors were systematically investigated. After complete leaching, spinel-type ferrites were synthesized from leach Liquors and the influence of RFe/M and pH value as well Zn ion doping on phase compositions, morphological structure and magnetic performance of as-synthesized samples were also characterized and analyzed. Under the optimized leaching conditions, the leaching efficiency of Ni, Co, Mn, Fe and Mg could reach 93.2%, 90.8%, 94.3%, 95.5% and 85.3%, respectively. With the concentration of iron ions in pickling Waste Liquors increasing from 60 to 160 g·L−1, the RFe/M value increases from 1.88 to 4.32. The pH values for synthesis of spinel-type ferrites with high purity from leach Liquors with RFe/M of 1.85 and 2.04 are 8.0 and 11.0, respectively, and the saturation magnetization Ms values of as-synthesized ferrites increase gradually with the increasing of pH value. Zn ions in pickling Waste Liquors could be doped and fixed in spinel-type ferrites to improve Ms values of as-synthesized ferrites, and the Ms value could reach the highest as 58.6 emu·g−1 when Zn ions doping amount is 0.4. Value-added utilization of pickling Waste liquor and saprolite laterite ore could be realized by the proposed process. This paper might provide theoretical and technical support for low-cost synthesis of spinel-type ferrites from polymetallic resources.
S H Laurie - One of the best experts on this subject based on the ideXlab platform.
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ion exchange studies on zinc rich Waste Liquors
Hydrometallurgy, 1999Co-Authors: C Simpson, S H LaurieAbstract:This paper reports on the use of ion exchange resins for the recovery of zinc, in a relatively pure form, from a zinc-rich industrial Waste liquor and from model zinc-rich solutions. Lewatit OC-1026 resin was found to have good zinc selectivity, whilst the chelating resins Purolite S-930, Metalfix Chelamine and Metalfix Chelosolve showed greater selectivity for the major contaminant ions, Cu, Cd and Pb. These resins however, showed some loss of their functional groups after a small number of repeat cycles.