The Experts below are selected from a list of 7392 Experts worldwide ranked by ideXlab platform
Jorg Heilmann - One of the best experts on this subject based on the ideXlab platform.
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phytochemical study of Juglans regia l leaves
Phytochemistry, 2017Co-Authors: Sebastian Schwindl, Birgit Kraus, Jorg HeilmannAbstract:A methanolic extract of Juglans regia L. leaves was fractioned by various chromatographic techniques yielding a total of 40 metabolites belonging to megastigmane, tetralone, phenylpropanoid, neolignane and juglone glycosides. Ten unknown megastigmane glucoside derivatives (juglanionosides A-K, 1-10) and six unknown tetralone glucoside derivatives (juglanosides J-O, 11-16) together with 24 known compounds - among them 16 described for the first time in Juglans - were isolated. As characteristic structural feature, the previously undescribed compounds showed acylation of the sugar units with sinapic, ferulic, coumaric, benzoic or salicylic acid. Their chemical structures were elucidated on the basis of 1D and 2D NMR techniques, HRESIMS as well as CD spectroscopy. Absolute stereochemistry was revealed by mild alkaline hydrolysis and comparison of CD and polarimetric data to literature values.
Nancy Pandita - One of the best experts on this subject based on the ideXlab platform.
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Pharmacognostic and Phytochemical Investigation of Juglans regia Linn. bark
Polymer Journal, 2011Co-Authors: Thakur Nirmladevi, Vinita Apraj, Rashmi Mallya, Laxman Sawant, Ashok Bhagwat, Nancy PanditaAbstract:Abstract Juglans regia Linn belongs to family Juglandaceae. It is commonly known as Walnut tree. Juglans regia bark has been claimed to possess anti-inflammatory, blood purifying, anticancer, depurative, diuretic and laxative activities. The bark is finely powdered and used to prevent bleeding gums and as a mouth rinse. The present investigation deals with microscopic evaluation of bark and establishment of its quality parameters, including physicochemical, phytochemical evaluation, HPTLC analysis & Microbial load. Chief microscopic characters include cork, phloem fibres with stone cells & calcium oxalate crystals. Phytochemical screening revealed presence of reducing sugars; alkaloids; tannins & phenols; steroids & saponins. The bark powder was found to be free from pathogenic organisms. The study will provide referential information for the correct identification of the crude drugs.
Sebastian Schwindl - One of the best experts on this subject based on the ideXlab platform.
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phytochemical study of Juglans regia l leaves
Phytochemistry, 2017Co-Authors: Sebastian Schwindl, Birgit Kraus, Jorg HeilmannAbstract:A methanolic extract of Juglans regia L. leaves was fractioned by various chromatographic techniques yielding a total of 40 metabolites belonging to megastigmane, tetralone, phenylpropanoid, neolignane and juglone glycosides. Ten unknown megastigmane glucoside derivatives (juglanionosides A-K, 1-10) and six unknown tetralone glucoside derivatives (juglanosides J-O, 11-16) together with 24 known compounds - among them 16 described for the first time in Juglans - were isolated. As characteristic structural feature, the previously undescribed compounds showed acylation of the sugar units with sinapic, ferulic, coumaric, benzoic or salicylic acid. Their chemical structures were elucidated on the basis of 1D and 2D NMR techniques, HRESIMS as well as CD spectroscopy. Absolute stereochemistry was revealed by mild alkaline hydrolysis and comparison of CD and polarimetric data to literature values.
Thakur Nirmladevi - One of the best experts on this subject based on the ideXlab platform.
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Pharmacognostic and Phytochemical Investigation of Juglans regia Linn. bark
Polymer Journal, 2011Co-Authors: Thakur Nirmladevi, Vinita Apraj, Rashmi Mallya, Laxman Sawant, Ashok Bhagwat, Nancy PanditaAbstract:Abstract Juglans regia Linn belongs to family Juglandaceae. It is commonly known as Walnut tree. Juglans regia bark has been claimed to possess anti-inflammatory, blood purifying, anticancer, depurative, diuretic and laxative activities. The bark is finely powdered and used to prevent bleeding gums and as a mouth rinse. The present investigation deals with microscopic evaluation of bark and establishment of its quality parameters, including physicochemical, phytochemical evaluation, HPTLC analysis & Microbial load. Chief microscopic characters include cork, phloem fibres with stone cells & calcium oxalate crystals. Phytochemical screening revealed presence of reducing sugars; alkaloids; tannins & phenols; steroids & saponins. The bark powder was found to be free from pathogenic organisms. The study will provide referential information for the correct identification of the crude drugs.
Birgit Kraus - One of the best experts on this subject based on the ideXlab platform.
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phytochemical study of Juglans regia l leaves
Phytochemistry, 2017Co-Authors: Sebastian Schwindl, Birgit Kraus, Jorg HeilmannAbstract:A methanolic extract of Juglans regia L. leaves was fractioned by various chromatographic techniques yielding a total of 40 metabolites belonging to megastigmane, tetralone, phenylpropanoid, neolignane and juglone glycosides. Ten unknown megastigmane glucoside derivatives (juglanionosides A-K, 1-10) and six unknown tetralone glucoside derivatives (juglanosides J-O, 11-16) together with 24 known compounds - among them 16 described for the first time in Juglans - were isolated. As characteristic structural feature, the previously undescribed compounds showed acylation of the sugar units with sinapic, ferulic, coumaric, benzoic or salicylic acid. Their chemical structures were elucidated on the basis of 1D and 2D NMR techniques, HRESIMS as well as CD spectroscopy. Absolute stereochemistry was revealed by mild alkaline hydrolysis and comparison of CD and polarimetric data to literature values.
