1,267 Result(s)
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Article
Studies on the constituents of higher fungi of Korea(XXIII)
The carpophores of three Korean mushrooms,Coriolus versicolor, Pleurotus ostreatus andLentinus edodes were respectively extracted with hot water and the extracts were dialyzed through Visking tube. They were foun...
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Article
Studies on the constituents of higher fungi of Korea(XXIV)
The carpophores of three Korean mushrooms,Coriolus versicolor, Pleurotus ostreatus, andLentinus edodes were respectively extracted with hot water and the extracts were dialyzed through Visking tube. They were fou...
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Article
Determination of the optical isomers of ethambutol (myambutol) and 2-amino-1-butanol by gas-liquid chromatography
Our need for a convenient method of analytical estimation of the precise optical purity ofd-2-aminobutanol (d-2AB) and dethambutol has prompted us to examine in detail the preparation and G.L.C. separation of the...
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Article
Studies on the antioxidant components of Korean ginseng (III)
The effective components of Korean ginseng showing the lipid-peroxide depressing activity were isolated. From the ether-soluble acidic fraction of fresh ginseng three phenolic acids were obtained. Salicylic ac...
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Article
Pharmacokinetics of digoxin in the turkey and comparison with other species
Digoxin was administered by bolus intravenous injection to seven broad-breasted white turkey poults at doses of 0.1, 0.15, or 0.2 mg/kg. Plasma digoxin concentrations were measured by a 125 I radioimmunoassay at...
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Article
Determination of ampicillin and cloxacillin mixture by NMR
A simple, accurate and specific NMR procedure is described for the determination of ampicillin and cloxacillin mixtures in injection dosage form and capsules. The solvent was dimethylsulfoxde-d6 and maleic acid w...
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Article
The transformation of ginsenosides by acid catalysis in gastric pH
1. The ginsenosides of Korean ginseng decomposed profoundly to produce artifact products of prosapogenin A1, A2 and A3 from ginsenoside Rg1, prosapogenin C1, C2 and C3 from ginsenoside Re, and prosapogenin E1, E2
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Article
Determination of N,N-dimethylaniline in penicillins by GC-MS
A quantitative GC-MS spectrometric assay was used for the determination of residual N,N-dimethylaniline as a contaminant in commercial penicillin derivatives from various sources. The assay utilizes selective ...
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Chapter
Purines
Of the hundreds of potential anticancer and antiviral agents synthesized over the past three decades, certain nucleosides have proved to be the most effective as antiviral agents, and are the only class of ant...
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Article
Isolation of ginsenosides Rb1, Rb2, Rc, Rd, Re, Rf and Rg1 from ginseng root by high performance liquid chromatography
Ginsenosides Rb1, Rb2, Rc, Rd, Re, Rf and Rg1 were effectively isolated from ginseng root by preparative liquid chromatography (LC) on two PrepPAK-500/C18 cartridges in series and semipreparative LC on a μBond...
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Article
Direct analysis of nicotelline from tobacco by MS with DADI/MIKE spectrometry
Nicotelline was directly analyzed from the crude tobacco extract by metastable studies. The metastable transitions of nicotelline were investigated by MS with DADI/MIKE spectrometry.
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Article
Studies on the constituents and culture of Korean basidiomycetes
To develop potent antitumor polysaccharides from higher fungi of Korea the alcohol precipitated polysaccharides, which were obtained from hot water extracts of shake-cultured mycelia of eight species of basidi...
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Article
Analyses of phenolics in cigarette smoke by GC-MS with the multiple ion selection technique
Improvements in the analytical methodology used in the gas chromatographic/mass spectral analysis of phenolic compounds from cigarette smoke are described. For the direct analysis of crude samples, pyridine ex...
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Chapter
Glucagon and Gluconeogenesis
Gluconeogenesis is the process whereby lactate, pyruvate, glycerol, and certain amino acids are converted to glucose and glycogen. The liver is the major site of gluconeogenesis, although the kidney becomes im...
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Article
Studies on the anti-inflammatory activity ofAralia continentalis (II)
Two phenolic acids were isolated from the hydrolyzed butanol fraction ofAralia continentalis K. in crystalline form. They were identified by chemical tests and by analysis of spectra of UV, IR and NMR as ferulic ...
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Article
Studies on the anti-inflammatory activity ofAralia continentalis (I)
By tracing albumin stabilizing activity an anti-inflammatory component, continentalic acid was isolated from ether-soluble acidic fraction ofAralia continentalis. Continentalic acid in a concentration of 0.115mg/...
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Article
Studies on the interaction of thiamines and cyclodextrins
Interactions between thiamine HCL and its disulfide derivatives TTFD, TPD and α-, β-cyclodextrins were investigated. By measuring the1H-NMR,13C-NMR chemical shifts, the assumption that cyclodextrin may form a inc...
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Article
Studies on constituents of Korean basidiomycetes (L)
To find antitumor metabolites in Korean basidiomycetes, the shake-cultured mycelia of eight of the higher fungi were extracted with hot water and the extracts, after being partially purified, were subjected toin ...
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Article
Antitumor activity of some phytobased polysaccharides and their effects on the immune function
Polysaccharide fractions were prepared from Ginseng root,Mori Radicis Cortex (M.R.C.),Phellodendri Cortex (Ph.C.),Sappan Wood (S.W.) andTigli Semen (T.S.). Water extract was also prepared from the mixture of Ph.C...
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Article
Determination of sulfur-containing drugs by gas chromatography with flame photometric detector
Such sulfur-containing drugs as chlorpromazine, sulfonamides and thiazides were determined by gas chromatography with flame photometric detector (FPD) and flame ionization detector (FID), 0.6% QF-1 or 3% SE-30...
