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Miao P, Cai DC, Xiang BR, An DK, Ito Y. Separation and Purification of Strychnine from Crude Extract of Strychnos nux-vomica L. by High-Speed Countercurrent Chromatography. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079808001945] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- P. Miao
- a Instrument Center of China Pharmaceutical University , Nanjing, 210009, China
| | - D.-C. Cai
- b Research Center of Pharmacy of the PLA Navy , Shanghai, 200083, China
| | - B.-R. Xiang
- a Instrument Center of China Pharmaceutical University , Nanjing, 210009, China
| | - D.-K. An
- a Instrument Center of China Pharmaceutical University , Nanjing, 210009, China
| | - Y. Ito
- c Laboratory of Biophysical Chemistry , National Heart, Lung, and Blood Institute , National Institutes of Health Bldg. 10, Rm 7N322, Bethesda, MD, 20892, USA
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An DK, Duncan D, Livinghouse T, Reid P. A concise synthesis of turneforcidine via a metalloiminium ion cyclization terminated by the 2-(methylthio)-3-(trimethylsilyl)-1-propenyl moiety. Org Lett 2001; 3:2961-3. [PMID: 11554818 DOI: 10.1021/ol010122b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A concise synthetic route to racemic turneforcidine (1) is described that relies on the stereocontrolled cyclization of the 2-(methylthio)-3-(trimethylsilyl)-1-propenyl bearing imine 5 in the presence of TiCl(4). Reaction: see text.
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Affiliation(s)
- D K An
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717, USA
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3
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Xie Y, Hang TJ, Cheng Z, Zhang ZX, An DK. [HPLC determination of oleanolic acid and llrolic acid in Chinese medicinal herbs]. Zhongguo Zhong Yao Za Zhi 2001; 26:615-6. [PMID: 12776430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
OBJECTIVE To develop a new method for simultaneous determination of oleanolic acid and llrolic acid in Chinese medicinal herbs at the same time. METHOD HPLC was carried out on a Shim-pack CLC-ODS column using MeOH-H2O-HOAc-TEA (83:17:0.04:0.02). RESULT AND CONCLUSION The average recovery of oleanolic acid and llrolic acid was 103.3 +/- 2.07% and 102.7% +/- 0.65% respectively.
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Affiliation(s)
- Y Xie
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, Jiangsu, China
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4
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Ding L, Zhang ZX, Ni PZ, Wang GJ, An DK. [Study on the phase II metabolites of phenoprolamine hydrochloride in rat bile by LC/DAD/MSD]. Yao Xue Xue Bao 2001; 36:440-3. [PMID: 12585129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To study the phase II metabolites of phenoprolamine hydrochloride (DDPH) in rat bile. METHODS DDPH was administered by i.p. to bile duct-cannulated rats. Bile samples were collected before drug administration and up to 12 h after drug administration. After being purified and enriched with C-18 SPE columns the rat bile samples were analyzed by LC/DAD/MSD to identify the peaks of phase II metabolites. The fractions of phase II metabolites were prepared by HPLC and treated with beta-glucuronidase, and then were purified and enriched with C-18 SPE columns and analyzed by LC/DAD/MSD. The corresponding reference standards of DDPH phase I metabolites were analyzed by LC/DAD/MSD under identical conditions. RESULTS The peaks M7, M8 and M9 in the chromatograms of rat bile samples were the phase II metabolites of DDPH and the enzymatic hydrolysates of M7, M8 and M9 were 1-(2, 6-dimethyl-4-hydroxyphenoxy)-2-(3, 4-methoxyphenylethylamino)-propane (M3), 1-(2, 6-dimethyl-3-hydroxyphenoxy)-2-(3, 4-methoxyphenylethylamino)-propane (M2) and 1-(2,6-dimethylphenoxy)-2-(3-methoxy-4-hydroxyphenylethyl-amino)-propane (M1) respectively. CONCLUSION beta-1-O-[3,5-dimethyl-4-[-2-methyl-2-(3,4-dimethoxy-phenylethylamino)- ethoxy]-phenyl]-glucuronic acid (M7, glucuronide of M3), beta-1-O-[2, 4-dimethyl-3-[2-methyl-2-(3, 4-dimethoxy-phenylethylamino)-ethoxy]-phenyl]-glucuronic acid (M8, glucuronide of M2) and beta-1-O-[2-methoxy-4-[1-methyl-2-(2, 6-dimethylphenoxy)-ethylamino-ethyl]-phenyl]-glucuronic acid (M9, glucuronide of M1) were the phase II metabolites of DDPH in rat bile.
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Affiliation(s)
- L Ding
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China.
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5
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Ding L, Zhang ZX, Ni PZ, Wang GJ, An DK. [Study on the phase I metabolites of phenoprolamine hydrochloride in rat bile by LC/DAD/MSD]. Yao Xue Xue Bao 2001; 36:205-9. [PMID: 12580089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To study the phase I metabolites of phenoprolamine hydrochloride (DDPH) in rat bile. METHODS DDPH was administered i.p. to bile duct-cannulated rats. Bile samples were collected before administration and up to 12 h after administration. After being treated with beta-glucuronidase, the bile samples were purified and enriched with C-18 SPE columns, and then were analyzed by LC/DAD/MSD. The samples containing synthesized reference standards of DDPH metabolite 1-(2, 6-dimethylphenoxy)-2-(3-methoxy-4-hydroxyphenylethylamino)-propane (M1), 1-(2, 6-dimethyl-3-hydroxyphenoxy)-2-(3, 4-methoxy-phenylethylamino)-propane (M2), 1-(2,6-dimethyl-4-hydroxyphenoxy)-2-(3,4- methoxyphenylethylamino)-propane (M3), 1-(2, 6-dimethyl-3-hydroxyphenoxy)-2-(3-hydroxy-4- methoxyphenylethylamino)-propane (M4), 1-(2, 6-dimethyl-3-hydroxyphenoxy)-2- (3-hydroxy-4-methoxyphenylethylamino)-propane (M5) and 1-(2,6-dimethyl-4-hydroxyphenoxy)-2-(3-methoxy-4- hydroxyphenylethylamino)-propane (M6) were analyzed by LC/DAD/MSD under identical conditions. RESULTS The retention times, UV spectra, molecular weights and production spectra (obtained by collision-induced dissociation) of the apparent ions of peak A, B, C, D, E and F in the total ion chromatogram of DDPH treated rat bile sample were consistent with those of M1, M2, M3, M5, M4 and M6, respectively. CONCLUSION M1, M2, M3, M4, M5 and M6 were identified as the phase I metabolites of DDPH in the rat.
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Affiliation(s)
- L Ding
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China.
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6
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Feng NP, Zhang ZX, An DK, Han XW, Huan WL, Wang GJ. [Analysis of the metabolite of 7-(4-chlorbenzyl)-7,8,13,13a-tetrahydroberberine in rabbit]. Yao Xue Xue Bao 2001; 36:137-9. [PMID: 12579883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To explore the biotransformation of compound 7-(4-chlorbenzyl)-7,8,13, 13a-tetrahydroberberine in the rabbit. METHODS Analyze the rabbit bile sample with HPLC, LC/MS and LC/NMR. RESULTS A metabolite and unchanged 7-(4-chlorbenzyl)-7,8,13,13a-tetrahydroberberine were found in the rabit bile, the metabolite was characterized and its structure was elucidated. CONCLUSION Compound 7-(4-chlorbenzyl)-7,8,13,13a-tetrahydroberberine is metabolized by demethylation at 10-OCH3 position.
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Affiliation(s)
- N P Feng
- China Pharmaceutical University, Nanjing 210009, China.
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Han J, Sheng LS, Yang ZY, Xiang BR, An DK. [High performance liquid chromatography/electrospray ionization mass spectrometric characterization of recombinant L-asparaginase II]. Yao Xue Xue Bao 2001; 36:46-50. [PMID: 12579860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To characterize the primary structure of recombinant L-asparaginase II product. METHODS The molecular weight of the protein was measured by pneumatically-assisted electrospray ionization mass spectrometry with flow injection mode. Subsequently, tryptic peptide mapping was performed by high performance liquid chromatography on a C8 column with tandem UV and MS detection. An easy-to-use and simple denaturation process with trichloroacetic acid was conducted prior to tryptic digest so as to release the digest resistance from the protein structure. The amino acid sequences of the tryptic peptides were elucidated based on their in-source collision-induced dissociation spectra. RESULTS The measured molecular mass was different from the theoretical value. Three amino acid variations were unambiguously detected along the peptide backbone derived from the gene-encoding sequence. CONCLUSION This paper revealed that LC/ESI/MS had provided a promising and robust technique in primary structure analysis and quality control of DNA-derived recombinant protein pharmaceuticals.
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Affiliation(s)
- J Han
- Guangzhou Institute for Drug Control, Guangzhou 510160, China.
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Yu CT, Guo YL, Zhang ZJ, Xiang BR, An DK. [Effect of solution pH value on the chelation structure of zinc acexamate by electrospray ionization mass spectrometry]. Yao Xue Xue Bao 2000; 35:913-5. [PMID: 12567914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To study the effect of solution pH value on the chelation structure of zinc acexamate. METHODS A series of samples at different solution pH values were prepared by 10% HCl or 1 mol.L-1 NH3.H2O. Then API/TOFMS with electrospray ion source was applied to assay the samples. The nitrogen curtain gas and nebulizer gas were adjusted to a constant flow rate of 0.6 microL.min-1 and 2 microL.min-1 respectively. Samples were infused into the electrospray interface using a 500 microL syringe pump at a flow rate of 5 microL.min-1. Mass spectra were acquired in positive ion modes by scanning over the range of m/z 100-1,000. RESULTS The chelation structure of zinc acexamate is stable at pH 2.54 and it can be easy to form the ion (M + ZnY)+ (Y = CH3CONH(CH2)5COO-) and (2M + Na)+ in this condition. CONCLUSION The drug is an effective antiulcer agent. It may decrease the acidity of stomach juice, and form a polymer to protect the ulcer.
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Affiliation(s)
- C T Yu
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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Peng JH, Sheng LS, Xiang BR, An DK. [HPLC/ESI MS and MALDI/TOF MS analysis of microheterogeneity of the N-linked oligosaccharides of recombinant human erythropoietin]. Yao Xue Xue Bao 2000; 35:764-9. [PMID: 11372444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
AIM To elucidate the microheterogeneity of three N-linked oligosaccharide sites of the Chinese-made recombinant human erythropoietin (rHuEPO). METHODS Glu-C digestion, RP-HPLC separation, online HPLC/electrospray ionization mass spectrometry and matrix-assisted laser desorption/ionization time of flight mass spectrometry. RESULTS The sialic acid was analyzed directly. Almost every oligosaccharide was acetylated, the acetylation of tetraantennary + 2LacNAc + 4SA and tetraantennary + 2LacNAc + 4SA were reported. CONCLUSION The acetylation of multi-antennary oligosaccharide will improve the activity of rHuEPO in vivo. The biantennary oligosaccharide was found mainly existing at N-24. For the first time, the carbohydrate structures of each N-linked glycosylated site of Chinese-made rHuEPO were reported.
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Affiliation(s)
- J H Peng
- Analytical and Computer Center, China Pharmaceutical University, Nanjing 210009, China
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Gang YY, Zhang ZX, Zhang SQ, Liu XD, An DK. [Pharmacokinetics and disposition of triptonide in rats]. Yao Xue Xue Bao 1998; 31:901-5. [PMID: 9863222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Triptonide, isolated from Tripterygium wilfordii Hook., was found to show significant antiinflammatory, immunosuppression and antitumor activities. A RP-HPLC method was applied to determine the plasma concentration of triptonide at different times in rats. Concentration-time curves after i.v., 0.7, 1.4 and 2.8 mg.kg-1 of triptonide were fitted to a two-compartment open model with T1/2 alpha of 0.167-0.195 h and T1/2 beta of 4.95-6.49 h. The area under curves (AUCs) were linearly related to the dosages (gamma = 0.9894). Systematic clearances (CLs) were independent of dosages. Mean residence time (MRT) of the three doses was 3.26-5.14 h by noncompartmental (the statistical moment method) analyses. The tissue distribution of triptonide in rats appeared to be wide throughout the body. The triptonide levels were high in the lung and liver, moderate in the heart, kidney, spleen and muscle and low in the testis, intestine and brain. Data of the urine and bile excretion indicated that only a small percent of unchanged triptonide was excreted. Plasma protein binding of triptonide rate was about 75%.
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Lu JF, Chen G, Xiang BR, An DK. Pharmacokinetic-pharmacodynamic modeling of electroencephalographic effects of midazolam in eight Chinese men. Zhongguo Yao Li Xue Bao 1994; 15:399-403. [PMID: 7717060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The effects of midazolam (Mid) on the electroencephalogram (EEG) were related to Mid concentrations in serum in 8 Chinese healthy male volunteers for the assessment of concentration-effect relationship. The total number of waves per second within the frequency range of 12-30 Hz (TNW12-30) in the central-occipital (C1-O1) lead EEG obtained by aperiodic analysis was used as EEG effect of the drug. The PK-PD parameters were calculated by PK-PD software using the sigmoid Emax model. They were: T1(2)keo = 1.3 +/- 0.9 min-1, EC50 = 254 +/- 54 micrograms.L-1, N = 2.9 +/- 0.6. E0 and Emax were calculated from the observed values, being 3.4 +/- 1.3 and 11.4 +/- 2.2 TNW12-30, respectively. Our results showed that the concentration-EEG effect relationship of Mid could be characterized in individual Chinese man using TNW12-30 as a measure of pharmacological response.
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Affiliation(s)
- J F Lu
- Department of Clinical Pharmacy of Jinling Hospital, Nanjing, China
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Lu JF, Wu MF, Chen G, Xiang BR, An DK. Midazolam pharmacokinetics and electroencephalographic changes in eight Chinese men. Zhongguo Yao Li Xue Bao 1993; 14:485-8. [PMID: 8010043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Eight Chinese healthy male volunteers aged 27 +/- s 4 a were injected i.v. midazolam (Mid) 15 mg. Blood samples were collected at 0, 2, 5, 7, 10, 20, 30, 45, 60, 90, 120, 180, and 240 min. A HPLC method was established for determining the Mid concentrations in serum. The concentration-time data was fitted with biexponential curve. Pharmacokinetic parameters were: T1/2 alpha = 6.8 +2- 2.5 min, T1/2 beta = 118 +/- 27 min, Vc = 25 +/- 7 L, Cl = 393 +/- 79 ml.min-1, Vdss = 59 +/- 13 L, AUC0-infinity = 39.6 +/- 8.6 g.min.L-1. The electroencephalogram (EEG) showed a decrease in alpha activity and an increase in beta activity. The EEG pattern reverted toward baseline after 2-3 h. Pharmacokinetic and EEG findings suggest that Mid is a preferable anesthesia inducing agent.
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Affiliation(s)
- J F Lu
- Department of Clinical Pharmacy of Jinling Hospital, Nanjing, China
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Fang XC, Yu BY, Xiang BR, An DK. Application of pyrolysis-high-resolution gas chromatography-pattern recognition to the identification of the Chinese traditional medicine mai dong. J Chromatogr A 1990; 514:287-92. [PMID: 2258397 DOI: 10.1016/s0021-9673(01)89400-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Pyrolysis-high-resolution gas chromatography-pattern recognition (Py-HRGC-PaRe) was used to develop a potential technique for identifying the Chinese traditional medicine Mai Dong. About 1 mg of crude drug powder was pyrolysed in a furnace pyrolyser and the products were directly carried into a gas chromatograph with an FSOT capillary column (30 m x 0.265 mm I.D.) coated with DB-1701 (df 0.25 micron). The Py-HRGC data were analysed by non-linear mapping PaRe. The results showed that Mai Dong samples could be classified into two categories: Ophiopogon japonicus (L.f.) Ker-Gawl (included in the Chinese Pharmacopoeia) and Liriope spicata.
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Affiliation(s)
- X C Fang
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing
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Zhang XY, Wu RJ, Chen JA, An DK. Determination of glycyrrhizin and its metabolite glycyrrhetinic acid in rabbit plasma by high-performance liquid chromatography after oral administration of licorzin. J Chromatogr 1989; 495:343-8. [PMID: 2613821 DOI: 10.1016/s0378-4347(00)82643-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- X Y Zhang
- Department of Pharmacy, Xinjiang Medical College, Urumchi, China
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Lin SL, Zhao LH, Wang YM, Dong SS, An DK. [Determination of berberine in Angong Niuhuang Wan by HPLC]. Yao Xue Xue Bao 1989; 24:48-52. [PMID: 2801124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A normal phase liquid chromatographic method was developed for the determination of berberine-type alkaloids in rhizoma Coptidis and traditional Chinese medicine--Angong Niuhuang Wan. Experimental evidences indicate that a normal phase system of a silica column (3.9 x 250 mm) as stationary phase with an eluent of ethyl acetate-formic acid-ethanol (15:3:2) as mobile phase can separate excellently (R5 greater than 1.5) four berberine-type alkaloids in the samples tested. According to the results obtained with this method the percent content of berberine hydrochloride in some Angong Niuhuang Wan from different factories and different batches was 0.331-0.456% and the average recovery was 97.23%; coefficient of variation was 1.2%.
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Zhang SQ, Olugo-Edege GC, Zhu YP, Mao FF, An DK. [High performance liquid chromatographic method for determination of procainamide and its active metabolites, N-acetylprocainamide in serum]. Yao Xue Xue Bao 1988; 23:430-4. [PMID: 2463733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Dong SS, Xu PJ, An DK. [Determination of the caffeine content in syrup vitamin B1 and glycerophosphate using the first derivative ratio method]. Yao Xue Xue Bao 1988; 23:441-4. [PMID: 3213530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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18
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Duan L, Xiang BR, Sheng LS, Wu RJ, An DK. [Orthogonal design-simplex method and its application to the analysis of compound antihypertensive tablets]. Yao Xue Xue Bao 1987; 22:761-8. [PMID: 3450128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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An DK, Xiang BR. [Use of the computer and the pharmaceutical analysis in recent years in China]. Yao Xue Xue Bao 1986; 21:475-80. [PMID: 3544675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Wang MZ, Liu JS, Song LL, Xiang BR, An DK. [Application of orthogonal function spectrophotometry to the determination of total diterpene orthoesters in yuanhua (Daphne genkwa Sieb. et Zucc.) root injection]. Yao Xue Xue Bao 1986; 21:119-23. [PMID: 3751590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Xiang BR, An DK, Lu M, Xu JP. [Investigation of the selective method for the optimal combination of paper chromatographic solvent systems of 22 kinds of amino acids]. Yao Xue Xue Bao 1985; 20:519-24. [PMID: 4096244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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22
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An DK, Xiang BR. [Selection of the optimal combination of solvent systems to be used in paper and thin layer chromatography]. Yao Xue Xue Bao 1984; 19:780-4. [PMID: 6544030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Sun HT, An DK, Wu RJ. [McCall's observation method--a discussion on the method of observation of partition efficiency of partition chromatography]. Yao Xue Xue Bao 1984; 19:137-40. [PMID: 6496081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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