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1.
Article in Chinese | WPRIM | ID: wpr-888183

ABSTRACT

In this study, data of amino acids of Cordyceps samples from Qinghai and Tibet was analyzed with self-organizing map neural network. A model of XY-Fused network was established with the content of 8 major amino acids and total amino acids for the identification of geographical origins of Cordyceps from Qinghai and Tibet. It had the prediction accuracy of 83.3% for the test set. In addition, data mining indicated that methionine was a special kind of amino acid in Cordyceps which could serve as a marker to identify its geographical origins. On this basis, the content ratio of methionine to total amino acids was proposed to be a quantifiable indicator to distinguish Cordyceps from Qinghai and Tibet.


Subject(s)
Amino Acids , Cordyceps/genetics , Geography , Neural Networks, Computer , Tibet
2.
Article in Chinese | WPRIM | ID: wpr-324811

ABSTRACT

Methods for determination of heavy metals and harmful residues in traditional Chinese medicine injection were established. Graphite furnace atomic absorption spectrometry was used for determination of lead, cadmium and copper, atomic fluorescence spectrometry for arsenic and mercury. The preprocessing method was optimized. The average recoveries of 5 elements were between 91% and 112% while the precisions were less than 2%. The determination limit of lead, cadmium, copper, arsenic and mercury were 0.28, 0.014, 0.49, 0.19, 0.061 microg x L(-1), respectively. The proposed method was simple, sensitive, accurate and reliable, and could be used widely.


Subject(s)
Arsenic , Cadmium , Drugs, Chinese Herbal , Chemistry , Lead , Mercury , Metals, Heavy , Spectrophotometry, Atomic , Methods
3.
Article in Chinese | WPRIM | ID: wpr-315954

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the chemical constituents of Balanophora spicata.</p><p><b>METHOD</b>Various chromatographic and spectral techniques were used to isolate the constituents and elucidate their structures.</p><p><b>RESULT</b>Eight compounds were isolated from whole plant of B. spicata and elucidated as balanophorin A (1), balanophorin B (2), beta-amyrin acetate (3), monogynol A (4), lupeone (5), caffeic acid ethyl ester (6), catechin (7), 1-O-(E)-caffeoyl-3-O-galloyl-beta-D-glucopyranose (8), respectively.</p><p><b>CONCLUSION</b>Compounds of 1-8 were obtained from B. spicata for the first time and the compound 4 was isolated from this genus for the first time.</p>


Subject(s)
Balanophoraceae , Chemistry , Caffeic Acids , Chemistry , Catechin , Chemistry , Oleanolic Acid , Chemistry , Plants, Medicinal , Chemistry
4.
Article in Chinese | WPRIM | ID: wpr-351752

ABSTRACT

<p><b>OBJECTIVE</b>To establish a method for the determination of the papaverine content in Qiangli Pibalu by HPLC.</p><p><b>METHOD</b>A C18 column with a solvent system of acetonitrile-0.02 mol x L(-1) sodium dihydrogen phosphate (0.2% triethylamine, phosphoric acid, at pH 3) (25:75) and UV detection 240 nm were used. The flow rate was 1.0 mL x min(-1). The column temperature was maintained at 40 degrees C.</p><p><b>RESULT</b>There was a good linear relationship between the absorption value and the concentration in the range of 0.020 2-0.100 5 microg for papaverine. The average recovery rates were 99.1% (RSD 2.3%).</p><p><b>CONCLUSION</b>The method is simple, accurate and can be used to determine the contents in Qiangli Pibalu.</p>


Subject(s)
Antitussive Agents , Chemistry , Pharmacology , Chromatography, High Pressure Liquid , Methods , Drug Combinations , Drugs, Chinese Herbal , Chemistry , Pharmacology , Eriobotrya , Chemistry , Expectorants , Chemistry , Pharmacology , Papaver , Chemistry , Papaverine , Plants, Medicinal , Chemistry , Quality Control , Reproducibility of Results
5.
Article in Chinese | WPRIM | ID: wpr-356750

ABSTRACT

<p><b>OBJECTIVE</b>To study the chemical constituents in root of Phlomis medicinalis.</p><p><b>METHOD</b>The compounds were isolated and repeatedly purified on macroporous resin, silica gel column chromatography, TLC and Prep-HPLC and the structures were elucidated by physico-chemical properties and NMR spectra.</p><p><b>RESULT</b>Eight compounds were obtained and elucidated as 5-Hydroxy-7-methoxy-4, 6-dimethylphthalide (1), 4-hydroxymethyl-2-furaldehyde (2) and six iridoid glucosides: 6-O-acetyl-shanzhiside methyl ester (3), 8-O-acetyl-shanzhiside methyl ester (4), shanzhiside methyl ester (5), sesamoside (6), phloyoside II (7) and dehydropentstemoside (8).</p><p><b>CONCLUSION</b>All the compounds were isolated from the plant for the first time and 1 and 3 were obtained from the plants of Phlomis for the first time.</p>


Subject(s)
Benzofurans , Chemistry , Glucosides , Chemistry , Phlomis , Chemistry , Plant Extracts , Chemistry , Plant Roots , Chemistry , Plants, Medicinal , Chemistry , Pyrans , Chemistry , Terpenes , Chemistry
6.
Article in Chinese | WPRIM | ID: wpr-274998

ABSTRACT

<p><b>OBJECTIVE</b>To demonstrate the chemical constituents of Alyxia sinensis.</p><p><b>METHOD</b>Phytochmical experiment was carried out, using column chromatograph technologies.</p><p><b>RESULT</b>Five compounds have been isolated from the petroleum ether soluble part of the stems of A. sinensis. Their structures have been elucidated respectively as heptatriacontane(1), octatriacontane(2), 20-noatriacontannone(3), 20-nonatriacontanone(4), 20-tetraacontanoe(5), physcion(6), emodin(7), chrysophanol(8), coumarin(9), stigmasterol acetate(10), beta-sitosterol acetate(11), lupeol(12), betulin(13), stigmasterol(14), beta-sitosterol(15), ursolic acid(16), oleanolic acid(17).</p><p><b>CONCLUSION</b>All these compounds are firstly been isolated from A. sinensis. And compound 5-9, 10, 11 are also been separated from Alyxiae genus for the first time.</p>


Subject(s)
Anthraquinones , Chemistry , Apocynaceae , Chemistry , Emodin , Chemistry , Plant Stems , Chemistry , Plants, Medicinal , Chemistry
7.
Article in Chinese | WPRIM | ID: wpr-274984

ABSTRACT

<p><b>OBJECTIVE</b>To demonstrate the chemical constituents of Alyxia sinensis.</p><p><b>METHOD</b>The constituents were isolated by column chromatography and identified by advanced physical and spectral analysis.</p><p><b>RESULT</b>Eight compounds have been isolated and elucidated as bauereny acetate(18), scopletin(19), liriodendrin(20), pinoresinol-di-O-beta-D-glucopyranoside(21), daucosterol(22), flaxetin(23), esculin(24), aseculin(25).</p><p><b>CONCLUSION</b>These compounds were found from the plant for the first time, and compound 20,21,23-25 were found from Alyxiae genis for the first time, and compound 18 is firstly been isolated from natural source.</p>


Subject(s)
Apocynaceae , Chemistry , Esculin , Chemistry , Furans , Chemistry , Glucosides , Chemistry , Molecular Structure , Plants, Medicinal , Chemistry , Triterpenes , Chemistry
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