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Biomedical subjects

Yutian Wu

Publications and source records attributed to Yutian Wu.

23 records · Page 2Linked to original sources
PubMed2005

Preparative separation of isovitexin and isoorientin from Patrinia villosa Juss by high-speed counter-current chromatography.

High-speed counter-current chromatography (HSCCC) with a solvent system composed of ethyl acetate-n-butanol-water (2:1:3, v/v/v) was used to isolate and separate two C-glycosylflavones from Patrinia villosa Juss, a traditional Chinese medicine. The separation produced 42.9 mg isovitexin and 20.1 mg isoorientin with purities of 99.3% and 98.5%, respectively as determined by high-performance liquid chromatography (HPLC) in one step elution from 250 mg crude extract, and identification was performed by MS, 1H NMR and 13C NMR. It is the first report of discovering isovitexin and isoorientin from the plant of Patrinia genus.

Apigenin↗
PubMed2005

[Determination of the artificial bezoar powder in the bezoar powder by near-infrared diffuse reflectance spectrometry].

OBJECTIVE: To establish a method determinating the artificial bezoar powder in the bezoar powder by near-infrared diffuse reflectance spectrometry. METHODS: The calibration set and the test set were set up by adding unequal artificial bezoar powder to the bezoar powder (content range: 0% - 100%), collecting the NIR spectrum of the samples. A mathematical model with partial least squares (PLS) was established to predict the test set. RESULTS: The coefficients of determination (R2) is 99.42 and the relative mean prediction error (RMSECV) is 1.93 respectively for the internal cross-validation set obtained. The coefficients of determination (R2) is 99. 9 and the relative mean standard error prediction (RMSEP) is 0.797, respectively for the test set obtained. The correlation coefficient between true and prediction is 0. 9972. CONCLUSION: This method is reliable and can be used to control the quality of preparations of bezoar powder.

Animals↗
PubMed2005

[Studies on chemical constituents of Patrinia villosa Juss].

Nine compounds including n-dotriacontanoic acid (I), n-dotriacontanol (II), Palmic acid (III), oleanolic acid (IV) aurentiamide acetate (V), daucosterol (VI), beta-sitosterol (VII), 7beta-hydroxysitosterol (VIII) and stigmasterol (IX) were isolated from petroleum ether and chloroform extract of Patrinia villosa Juss. Among them, compounds I, II, V, VIII were obtained from the plant of Patrinia for the first time and compounds VI, VII ,IX were separated from Patrinia villosa Juss for the first time.

Acetates↗
PubMed2003

[Textual research of wuguteng].

OBJECTIVE: To make clear the origin of the traditional Chinese medicine, Wuguteng. METHODS: The correlation literature was consulted and arranged. RESULTS: There are a few plants using as Wuguteng, such as Fissistigma glaucescens (Hance) Merr. and Marsdenia tenacissima (Roxb.) Wight et Arn. in the records of principle literature. Wuguteng used as a drug was first recorded in "Dian Nan Ben Cao". The views of various persons in past dynasties on the efficacy of Wuguteng are unanimous. CONCLUSION: The paper has proved that Wuguteng comes from Marsdenia tenacissima of Asclepiadaceae.

Annonaceae↗