roemerine/riekstu lotoss

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[HPLC determination of 2-hydroxy-1-methoxyaporphine, pronuciferine, nuciferine and roemerine in Nelumbo nucifera and its alkaloid fraction].

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Ielogoties Reģistrēties

OBJECTIVE To establish an HPLC method for the determination of four alkaloids, i.e., 2-hydroxy-1-methoxyaporphine, pronuciferine, nuciferine and roemerine, in Nelumbo nucifera and its alkaloid fraction. METHODS The determination was carried out at 35 degrees C on a Hypersil C18 column (4.6 mm x 250

Anthelmintic activities of aporphine from Nelumbo nucifera Gaertn. cv. Rosa-plena against Hymenolepis nana.

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Ielogoties Reģistrēties

Nelumbo nucifera Gaertn. cv. Rosa-plena (Nelumbonaceae), commonly known as lotus, is a perennial aquatic plant grown and consumed throughout Asia. All parts of N. nucifera have been used for various medicinal purposes in oriental medicine. From the leaves of Nelumbo nucifera Gaertn. cv. Rosa-plena

[Chemical constituents from leaves of Nelumbo nucifera].

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To study the chemical constituents, twenty-seven compounds were isolated from the 70% ethanol extract from leaves of Nelumbo nucifera by modern chromatographic techniques. Their structures were identified as 10-octacosanol (1), beta-sitosterol (2), 1-undecanol (3), 1-eicosanol (4), daucosterol (5),

A general ionic liquid pH-zone-refining countercurrent chromatography method for separation of alkaloids from Nelumbo nucifera Gaertn.

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Ielogoties Reģistrēties

The alkaloids from lotus (Nelumbo nucifera Gaertn) are effective in lowering hyperlipemia and level of cholesterol. However, there is not a general method for their separation. In this work, a general ionic liquid pH-zone-refining countercurrent chromatography method for isolation and purification

Constituents of Nelumbo nucifera leaves and their antimalarial and antifungal activity.

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Ielogoties Reģistrēties

From the leaves of Nelumbo nucifera (an aquatic plant), one new compound, 24(R)-ethylcholest-6-ene-5α-ol-3-O-β-D-glucopyranoside (1), along with 11 known metabolites (2-12), were isolated and identified by spectroscopic methods including 1D- and 2D NMR. Antifungal activity for (R)-roemerine (3)

Purification and characterization of aporphine alkaloids from leaves of Nelumbo nucifera Gaertn and their effects on glucose consumption in 3T3-L1 adipocytes.

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Ielogoties Reģistrēties

Aporphine alkaloids from the leaves of Nelumbo nucifera Gaertn are substances of great interest because of their important pharmacological activities, particularly anti-diabetic, anti-obesity, anti-hyperlipidemic, anti-oxidant, and anti-HIV's activities. In order to produce large amounts of pure

Preparative separation of alkaloids from Nelumbo nucifera leaves by conventional and pH-zone-refining counter-current chromatography.

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Ielogoties Reģistrēties

Two modes of high-speed counter-current chromatography (HSCCC) were successfully applied to the separation of alkaloids from crude extract of Nelumbo nucifera leaves. The conventional HSCCC separations were performed with a two-phase solvent system composed of tetrachloromethane-CHCl3-methanol-0.1 M

Analysis of alkaloids in Lotus (Nelumbo nucifera Gaertn.) leaves by non-aqueous capillary electrophoresis using ultraviolet and mass spectrometric detection.

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Ielogoties Reģistrēties

Lotus leaves are a popular remedy in Asia to treat obesity, insomnia and mental impairment; alkaloids are considered most relevant for bioactivity. In this study the first CE method for the determination of all major alkaloids ((-)-nuciferine, (-)-nornuciferine, (-)-caaverine, (-)-armepavine,

Antioxidant and anticancer aporphine alkaloids from the leaves of Nelumbo nucifera Gaertn. cv. Rosa-plena.

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Ielogoties Reģistrēties

Fifteen compounds were extracted and purified from the leaves of Nelumbo nucifera Gaertn. cv. Rosa-plena. These compounds include liriodenine (1), lysicamine (2), (-)-anonaine (3), (-)-asimilobine (4), (-)-caaverine (5), (-)-N-methylasimilobine (6), (-)-nuciferine (7), (-)-nornuciferine (8),

LC/MS guided isolation of alkaloids from lotus leaves by pH-zone-refining counter-current chromatography.

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Ielogoties Reģistrēties

The traditional methods used in natural product separation primarily target the major components and the minor components may thus be lost during the separation procedure. Consequently, it's necessary to develop efficient methods for the preparative separation and purification of relatively minor

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