The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
Fulvio Mattivi - One of the best experts on this subject based on the ideXlab platform.
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concentration and mean degree of polymerization of rubus ellagitannins evaluated by optimized Acid methanolysis
Journal of Agricultural and Food Chemistry, 2006Co-Authors: Urska Vrhovsek, Arianna Palchetti, Fabiano Reniero, Claude Guillou, Domenico Masuero, Fulvio MattiviAbstract:Ellagitannins are a major class of phenolics largely responsible for the astringent and antioxidant properties of raspberries and blackberries. The Rubus ellagitannins constitute a complex mixture of monomeric and oligomeric tannins. Rubus oligomeric ellagitannins contain, beside the well-known ellagic Acid and gallic Acid moieties, the sanguisorboyl linking ester group. When exposed to Acids or bases, ester bonds are hydrolyzed and the Hexahydroxydiphenic Acid spontaneously cyclizes into ellagic Acid. This study describes a new, rapid procedure for the Acid hydrolysis of Rubus ellagitannins in methanol, which results in maximal yield and enables the quantification of all the major reaction products. Additionally, the method provides the rationale for estimating the mean degree of polymerization of Rubus ellagitannins. Keywords: Rubus; ellagitannins; ellagic Acid; sanguisorbic Acid; gallic Acid; Hexahydroxydiphenic Acid
Urska Vrhovsek - One of the best experts on this subject based on the ideXlab platform.
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concentration and mean degree of polymerization of rubus ellagitannins evaluated by optimized Acid methanolysis
Journal of Agricultural and Food Chemistry, 2006Co-Authors: Urska Vrhovsek, Arianna Palchetti, Fabiano Reniero, Claude Guillou, Domenico Masuero, Fulvio MattiviAbstract:Ellagitannins are a major class of phenolics largely responsible for the astringent and antioxidant properties of raspberries and blackberries. The Rubus ellagitannins constitute a complex mixture of monomeric and oligomeric tannins. Rubus oligomeric ellagitannins contain, beside the well-known ellagic Acid and gallic Acid moieties, the sanguisorboyl linking ester group. When exposed to Acids or bases, ester bonds are hydrolyzed and the Hexahydroxydiphenic Acid spontaneously cyclizes into ellagic Acid. This study describes a new, rapid procedure for the Acid hydrolysis of Rubus ellagitannins in methanol, which results in maximal yield and enables the quantification of all the major reaction products. Additionally, the method provides the rationale for estimating the mean degree of polymerization of Rubus ellagitannins. Keywords: Rubus; ellagitannins; ellagic Acid; sanguisorbic Acid; gallic Acid; Hexahydroxydiphenic Acid
Arianna Palchetti - One of the best experts on this subject based on the ideXlab platform.
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concentration and mean degree of polymerization of rubus ellagitannins evaluated by optimized Acid methanolysis
Journal of Agricultural and Food Chemistry, 2006Co-Authors: Urska Vrhovsek, Arianna Palchetti, Fabiano Reniero, Claude Guillou, Domenico Masuero, Fulvio MattiviAbstract:Ellagitannins are a major class of phenolics largely responsible for the astringent and antioxidant properties of raspberries and blackberries. The Rubus ellagitannins constitute a complex mixture of monomeric and oligomeric tannins. Rubus oligomeric ellagitannins contain, beside the well-known ellagic Acid and gallic Acid moieties, the sanguisorboyl linking ester group. When exposed to Acids or bases, ester bonds are hydrolyzed and the Hexahydroxydiphenic Acid spontaneously cyclizes into ellagic Acid. This study describes a new, rapid procedure for the Acid hydrolysis of Rubus ellagitannins in methanol, which results in maximal yield and enables the quantification of all the major reaction products. Additionally, the method provides the rationale for estimating the mean degree of polymerization of Rubus ellagitannins. Keywords: Rubus; ellagitannins; ellagic Acid; sanguisorbic Acid; gallic Acid; Hexahydroxydiphenic Acid
Fabiano Reniero - One of the best experts on this subject based on the ideXlab platform.
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concentration and mean degree of polymerization of rubus ellagitannins evaluated by optimized Acid methanolysis
Journal of Agricultural and Food Chemistry, 2006Co-Authors: Urska Vrhovsek, Arianna Palchetti, Fabiano Reniero, Claude Guillou, Domenico Masuero, Fulvio MattiviAbstract:Ellagitannins are a major class of phenolics largely responsible for the astringent and antioxidant properties of raspberries and blackberries. The Rubus ellagitannins constitute a complex mixture of monomeric and oligomeric tannins. Rubus oligomeric ellagitannins contain, beside the well-known ellagic Acid and gallic Acid moieties, the sanguisorboyl linking ester group. When exposed to Acids or bases, ester bonds are hydrolyzed and the Hexahydroxydiphenic Acid spontaneously cyclizes into ellagic Acid. This study describes a new, rapid procedure for the Acid hydrolysis of Rubus ellagitannins in methanol, which results in maximal yield and enables the quantification of all the major reaction products. Additionally, the method provides the rationale for estimating the mean degree of polymerization of Rubus ellagitannins. Keywords: Rubus; ellagitannins; ellagic Acid; sanguisorbic Acid; gallic Acid; Hexahydroxydiphenic Acid
Claude Guillou - One of the best experts on this subject based on the ideXlab platform.
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concentration and mean degree of polymerization of rubus ellagitannins evaluated by optimized Acid methanolysis
Journal of Agricultural and Food Chemistry, 2006Co-Authors: Urska Vrhovsek, Arianna Palchetti, Fabiano Reniero, Claude Guillou, Domenico Masuero, Fulvio MattiviAbstract:Ellagitannins are a major class of phenolics largely responsible for the astringent and antioxidant properties of raspberries and blackberries. The Rubus ellagitannins constitute a complex mixture of monomeric and oligomeric tannins. Rubus oligomeric ellagitannins contain, beside the well-known ellagic Acid and gallic Acid moieties, the sanguisorboyl linking ester group. When exposed to Acids or bases, ester bonds are hydrolyzed and the Hexahydroxydiphenic Acid spontaneously cyclizes into ellagic Acid. This study describes a new, rapid procedure for the Acid hydrolysis of Rubus ellagitannins in methanol, which results in maximal yield and enables the quantification of all the major reaction products. Additionally, the method provides the rationale for estimating the mean degree of polymerization of Rubus ellagitannins. Keywords: Rubus; ellagitannins; ellagic Acid; sanguisorbic Acid; gallic Acid; Hexahydroxydiphenic Acid