The crude ethyl acetate extract of the leaves of Cornus macrophylla showed antibacterial activity against Pseudomonas aeruginosa, a leading cause of illness in immunocompromised individuals. Bioactivity-guided separation led to the isolation of kaempferol 3-O-α-L-rhamnopyranoside (afzelin). The structure was determined based on evaluation of its spectroscopic (UV, MS, and NMR) data. The minimum...

The use of electrospray ionization mass spectrometry (ESI-MS) in negative ion mode was investigated as a direct probe for identifying Al species in Al-accumulating hydrangea (Hydrangea macrophylla) samples. Cell sap solutions of hydrangea leaves were purified using Sephadex G-10 liquid chromatography and each fraction was analyzed using ESI-MS and ESI-MS/MS to identify Al species. In hydrangea ...

x ∈ Σ∗ is a sequence from the alphabet Σ, xi is the ith symbol, where p(xi) is a distribution over Σ independent of i. (Actually, a full model of the empirical distribution would also have to include a model of the length distribution P (n). But let’s neglect that.) On his third level, he distinguished different p(xi) for different parts of the sequence. Distinguishing different p(xi) for every...

Shorea macrophylla is also named as ‘Engkabang’ (Iban), ‘Kawang’ (Brunei), and ‘Tengkawang’ (Indonesia). It belongs to the Dipterocarpaceae family categorised under genus Shorea, which can be found in tropical rainforests Southeast Asia. prefers wet habitats, such periodically flooded alluvium riverbanks. The tree size of S. medium or large; however, some researchers Kalimantan claim it a small...

BACKGROUND Echinacea sales represent 10% of the dietary supplement market in the United States, but there is no guarantee as to the content, quality, variability, or contamination in Echinacea preparations. OBJECTIVE To qualitatively and quantitatively assess the contents of Echinacea-only preparations available in a retail setting. METHODS One of each single-herb Echinacea preparations tha...

Our ongoing investigations on the stem bark of Uncaria macrophylla afforded a new ursolic triterpene, 3β,6β,19α-trihydroxy-urs-12-en-28-oic acid-24-carboxylic acid methyl ester (1), named uncariursanic acid, and three known ursolic triterpenes including 3β,6β,19α-trihydroxy-23-oxo-urs-12-en-28-oic acid (2), 3β,6β,19α-trihydroxy-urs-12-en-28-oic acid (3) and ursolic acid (4). Their structures we...

Following the characterization of dihydroisocoumarin constituents, two secoiridoid glucoside complexes, called hydramacrosides A and B, were isolated from the leaves of Hydrangea macrophylla Seringe var. thunbergii Makino. The absolute stereostructures of hydramacrosides A and B were elucidated on the basis of chemical and physicochemical evidence, which included the application of the 13C-NMR ...

Bioassay-guided fractionation of the methanolic extracts of Vismia baccifera, V. jefensis, and V. macrophylla against human breast, CNS, and lung cancer cell lines resulted in the isolation of a new compound, ferruginin C (1), and seven known compounds, ferruginins A (2) and B (3), vismin (4), harunganin (5), vismione B (6), deacetylvismione H (7), and deacetylvismione A (8), as active constitu...