ardisia/二酸化ケイ素

BACKGROUND The pan-tropical genus Ardisia has more than 400 species and is of high horticultural and medicinal value. Due to overexploitation it is important to conserve the germplasm of this genus. OBJECTIVE To investigate the feasibility and methods of cryopreservation for long-term seed storage

OBJECTIVE To study the chemical constituents of the dried rhizome of Ardisia gigantifolia. METHODS The 60% ethanol extract was extracted with EtOAc, and then separated and purified by column chromatography using silica gel and preparative HPLC. Their structures were identified on the basis of

OBJECTIVE To study the anti-tumor metastatic constituents from Ardisia Crenata. METHODS Chemical constituents were isolated and purified by repeated column chromatography( silica gel, Toyopearl HW40C and preparative HPLC). Their structures were elucidated on the basis of spectral data analysis. The

The phytochemical study of the MeOH extract from the fruits of Ardisia kivuensis was carried out using repeated silica gel column chromatography followed by Sephadex LH-20 to afford a new alkenylmethylresorcinol, ardisinol III (1) along with three known compounds, oleanolic acid, β-sitosterol and

OBJECTIVE To study the chemical constituents from the roots of Ardisia punctata. METHODS Compounds were isolated by chromatographic techniques on silica gel and Rp-HPLC column. Their structures were elucidated by chemical and spectroscopic methods. RESULTS Twelve compounds were identified as

OBJECTIVE To study chemical constituents of Ardisia punctata,in order to find pioneering compounds. METHODS 95% ethanol extracts of A. punctata was separated and purified by using normal phase silica gel column chromatographies, Sephadex LH-20 gel column chromatography and high-pressure preparative

OBJECTIVE To investigate the chemical constituents of Ardisia tenera Mez. METHODS Compounds were isolated by normal phase silica gel, MCI GEL and Sephadex LH-20 gel column chromatography. Their structures were elucidated by analyses of spectroscopic data. RESULTS Eight compounds were isolated, and