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276 results on '"R. Knuppen"'

252. [Interactions of estrogens and catecholamines. IV. Effect of estrogens on the blood pressure effect of catecholamines in the rat].

Author

Knuppen R, Wennrich W, Ball P, and Breuer H

Subjects
Animals, Catechol O-Methyltransferase metabolism, Catechols, Cocaine pharmacology, Drug Interactions, Epinephrine administration & dosage, Estradiol administration & dosage, Injections, Intravenous, Male, Manometry, Norepinephrine administration & dosage, Rats, S-Adenosylmethionine, Spinal Cord physiology, Spinal Cord surgery, Stimulation, Chemical, Blood Pressure drug effects, Epinephrine pharmacology, Estradiol pharmacology, Norepinephrine pharmacology
Published
1972

255. Metabolism of 2-hydroxyoestrogen methyl ethers in the rat liver in vitro.

Author

Hoppen HO, Ball P, Hoogen H, and Knuppen R

Subjects
Animals, Ascorbic Acid, Catechol O-Methyltransferase metabolism, Chromatography, Chromatography, Gas, Chromatography, Paper, Chromatography, Thin Layer, Electrophoresis, Paper, Estrone analogs & derivatives, Estrone metabolism, Glucosephosphate Dehydrogenase metabolism, Male, Mass Spectrometry, Methyl Ethers metabolism, Microsomes, Liver enzymology, NADP, Oxidation-Reduction, Rats, Silicon Dioxide, Estradiol analogs & derivatives, Estradiol metabolism, Hydroxysteroids metabolism, Microsomes, Liver metabolism
Published
1973
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260. Purification and properties of a catechol-o-methyltransferase of human liver.

Author

Ball P, Knuppen R, and Breuer H

Subjects
Carbon Isotopes, Catechols, Chemical Phenomena, Chemistry, Chlorides, Chromatography, Chromatography, DEAE-Cellulose, Chromatography, Gel, Chromatography, Ion Exchange, Cysteine, Drug Stability, Edetic Acid, Electrophoresis, Disc, Enzyme Activation, Estradiol, Humans, Hydrogen-Ion Concentration, Magnesium, Microsomes, Liver enzymology, Molecular Weight, S-Adenosylmethionine, Temperature, Ultracentrifugation, Liver enzymology, Methyltransferases isolation & purification
Published
1971
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262. Interactions between estrogens and catechol amines. 3. Studies on the methylation of catechol estrogens, catechol amines and other catechols by the ctechol-O-methyltransferases of human liver.

Author

Ball P, Knuppen R, Haupt M, and Breuer H

Subjects
Adult, Carbon Isotopes, Chemical Phenomena, Chemistry, Chlorides, Cysteine, Dopamine, Epinephrine, Estradiol, Estriol, Estrone, Humans, Kinetics, Magnesium, Male, Mandelic Acids, Methylation, Norepinephrine, S-Adenosylmethionine, Time Factors, Catecholamines, Catechols, Estrogens, Liver enzymology, Methyltransferases antagonists & inhibitors, Methyltransferases isolation & purification
Published
1972
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267. Metabolism of 6-chloro-9 beta, 10 alpha-pregna-1,4,6-triene-3,20-dione in rat, rabbit, monkey and man.

Author

Breuer H, Kime DE, and Knuppen R

Subjects
Adolescent, Adult, Aged, Animals, Child, Chromatography, Gas, Chromatography, Paper, Culture Techniques, Female, Haplorhini, Humans, Hydroxylation, Male, Mass Spectrometry, Middle Aged, Pregnatrienes urine, Rabbits, Rats, Sex Factors, Spectrophotometry, Infrared, Tritium, Fertility Agents metabolism, Liver metabolism, Pregnatrienes metabolism, Progestins metabolism
Published
1973
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268. 6-alpha-hydroxylation in human placenta perfusion.

Author

Cédard L and Knuppen R

Subjects
Carbon Isotopes, Chromatography, Paper, Female, Humans, In Vitro Techniques, Perfusion, Pregnancy, Dehydroepiandrosterone pharmacology, Estradiol pharmacology, Estrone pharmacology, Placenta drug effects, Placenta metabolism, Testosterone pharmacology
Published
1965
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269. Kinetic properties of a soluble catechol O-methyltransferase of human liver.

Author

Ball P, Knuppen R, Haupt M, and Breuer H

Subjects
Allosteric Regulation, Catechol O-Methyltransferase isolation & purification, Catechol O-Methyltransferase Inhibitors, Chromatography, Paper, Cysteine, Estriol, Humans, Hydrogen-Ion Concentration, Hydroxysteroids, Isomerism, Kinetics, Magnesium, Methyl Ethers, Methylation, S-Adenosylmethionine pharmacology, Spectrum Analysis, Temperature, Drug Interactions, Liver enzymology, Methyltransferases
Published
1972
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271. Synthesis of 2-hydroxy-ethynylestradiol and 4-hydroxy-ethynylestradiol.

Author

Gelbke HP, Ball P, Haupt O, and Knuppen R

Subjects
Chromatography, Hydroxylation, Hydroxysteroids chemical synthesis, Magnetic Resonance Spectroscopy, Mass Spectrometry, Nitroso Compounds, Oxidation-Reduction, Potassium Iodide, Silicon Dioxide, Spectrophotometry, Infrared, Spectrophotometry, Ultraviolet, Sulfonic Acids, Ethinyl Estradiol
Published
1973
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272. [Metabolism of 9beta, 10alpha-testosterone in tissue preparations of rat liver and bovine adrenal glands].

Author

Breuer H and Knuppen R

Subjects
17-Ketosteroids isolation & purification, Androstanes isolation & purification, Animals, Cattle, Chromatography, Paper, Chromatography, Thin Layer, Hydroxysteroid Dehydrogenases metabolism, Infrared Rays, Kinetics, Liver cytology, Microsomes metabolism, Rats, Spectrophotometry, Adrenal Glands metabolism, Liver metabolism, Testosterone metabolism
Published
1969

276. [Purification and characterization of human placenta S-adenosylmethionine:catechol-O-methyltransferase].

Author

Gugler R, Knuppen R, and Breuer H

Subjects
Alcohols, Carbon Isotopes, Catechols, Chemical Precipitation, Chromatography, Gel, Cold Temperature, Cysteine, Drug Stability, Epinephrine, Estranes, Female, Humans, Hydrogen-Ion Concentration, Kinetics, Metals, Methionine, Molecular Weight, Nucleosides, Phenethylamines, Pregnancy, Thermodynamics, Placenta enzymology, Transferases isolation & purification
Published
1970
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