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aloenin/aloe arborescens
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12 resultados
The distribution of the phenolic metabolites barbaloin, aloeresin and aloenin as a peripheral defense strategy in the succulent leaf parts of Aloe arborescens.
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Aloe arborescens is a large, multi-stemmed shrub. It is used as hedge plants to protect agricultural fields or stock and as horticultural plants in gardens. In natural habitats it is one of the very common Aloe species along the Indian Ocean coast of southern Africa, from the Cape, in the south, to
Biotransformation of aloenin, a bitter glucoside constituent of Aloe arborescens, by rats.
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Aloenin has been established to be 4-methoxy-6-(2-beta-D-glucopyranosyloxy-4-hydroxy-6-methylphenyl)-2-pyrone; it shows an inhibitory activity for gastric juice secretion. Rats metabolized it to 4-methoxy-6-(2,4-dihydroxy-6-methylphenyl)-2-pyrone, 2,5-dimethyl-7-hydroxychromone and glucose, which
[Active constituents from Aloe arborescens as BACE inhibitors].
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OBJECTIVE
To seek for new components as BACE inhibitors from Aloe arborescens.
METHODS
The chemical constituents were isolated by chromatographic methods and their structures were elucidated on the basis of spectral analysis.
RESULTS
Eight compounds were isolated and their structures identified as
Novel type III polyketide synthases from Aloe arborescens.
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Aloe arborescens is a medicinal plant rich in aromatic polyketides, such as pharmaceutically important aloenin (hexaketide), aloesin (heptaketide) and barbaloin (octaketide). Three novel type III polyketide synthases (PKS3, PKS4 and PKS5) were cloned and sequenced from the aloe plant by cDNA library
The content of secondary phenol metabolites in pruned leaves of Aloe arborescens, a comparison between two methods: leaf exudates and leaf water extract.
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Aloe arborescens plants, originating from the deserts of South Africa, are grown in the Introduction Garden at Sede Boker in the Negev Desert of Israel. In previous studies, we developed agro-technical methods to raise the content of secondary phenol metabolites (SPhMs) in the Aloe leaves. Plants
Physicochemical and microbiological properties as well as stability of ointments containing aloe extract (Aloe arborescens Mill.) or aloe extract associated to neomycin sulphate.
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The aim of the study was to work out methods of quality assessment of ointments containing dry extract from fresh leaves of Aloe arborescens Mill. (Lilliaceae) and also of ointments containing both of dry extract and neomycin sulphate. The stability of the ointments, stored at 20 degrees C, was
Technology of eye drops containing aloe (Aloe arborescens Mill.--Liliaceae) and eye drops containing both aloe and neomycin sulphate.
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Eye drops made of aloe are a sterile, aqueous extract of fresh leaves of Aloe arborescens Mill., containing necessary additives and neomycin sulphate. The aim of the studies was to establish the technology of eye drops containing biologically active aloe substances and those containing both chemical
Aloe arborescens extract inhibits TPA-induced ear oedema, putrescine increase and tumour promotion in mouse skin.
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The ethyl acetate extract of the acetone-soluble Aloe arborescens fraction was found to inhibit 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced ear oedema, putrescine increase and tumour promotion in mouse skin. Chromatographic analyses of this extract revealed that phenolic compounds such as
Determination of aloenin, barbaloin and isobarbaloin in aloe species by micellar electrokinetic chromatography.
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Aloenin, barbaloin and isobarbaloin in JP Aloe, Aloe barbadensis (Aloe vera) and Aloe arborescens Miller var. natalensis Berger (Aloe arborescens Miller) were determined by micellar electrokinetic chromatography (MEKC) with 50 mM sodium dodecyl sulfate. Aloenin, barbaloin and isobarbaloin were well
Biologically active constituents of leaves and roots of Aloe arborescens var. natalensis.
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Several biologically active substances, such as aloenin (1), magnesium lactate, aloe-emodin (4), barbaloin (5), and succinic acid, were found to be contained in the leaf juice of Aloe arborescens Mill. var. natalensis Berger, which has widely been used in domestic medicines. Aloenin (1) and
Biopharmaceutical assessment of eye drops containing aloe (Aloe arborescens Mill.) and neomycin sulphate.
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The subject of the studies was eye drops made of aloe, containing the group of aloe chemical substances of anti-inflammatory use and neomycin sulphate. The aim of the studies was to evaluate the permeability of biologically active aloe substances, determined as aloenin, through synthetic lipophilic
4'-O-Alkyaloenin derivatives and their sulfates directed toward overcoming multidrug resistance in tumor cells.
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The cytotoxic effects on HCT 116, Hep G2 and HCT 116/VCR 100-1-1 cell lines of synthetic 4'-O-alkylaloenins (2-17), 4'-O-benzylaloenin (18) and 4'-O-allylaloenin (19) were examined by MTT assay, and compared with that of aloenin (1) isolated from Aloe arborescens Mill. Var. natalensis Berger which
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