Related Experiment Video
Updated: Jul 13, 2026

Assessing the Particulate Matter Removal Abilities of Tree Leaves
Published on: October 7, 2018
Water-soluble constituents from the leaves of Ilex oblonga
M-A Ouyang1, C-Z Wang, S-B Wang
1Department of Bio-engineering and Technology, Huaqiao University, Quanzhou 362011, Fujian, P. R. China. maouyang@hqu.edu.cn
Abstract:
Four new water-soluble constituents, oblongaroside A (1), oblongar ester A (2), oblongaroside B (3), and oblongaroside C (4), were isolated along with four known compounds: 4-O-beta-D-glucopyranosyl-3-hydroxybenzalcohol (5), 7-methoxyl-4-O-beta-D-glucopyranosyl-3-hydroxybenzalcohol (6), 4-O-beta-D-glucopyranosyl-3-hydroxybenzoic acid (7), and 3,4-dihydroxybenzoic acid (8) from the leaves of Ilex oblonga. Identification of their structures was achieved by 1D and 2D NMR experiments, including (1)H-(1)H COSY, NOESY, HMQC, and HMBC methods and FAB mass spectral data.
Related Concept Videos
Xylem and Transpiration-driven Transport of Resources
Solubility
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules, atoms, and/or ions)...
Solubility of Ionic Compounds
Solvents
A...
Factors Affecting Solubility
Adaptations that Reduce Water Loss

