Accumulation of methylsulfonyl derivatives of some bronchial-seeking polychlorinated biphenyls in the respiratory tract of mice

Bergman Å; Brandt I; Jansson B;
1979 | Toxicol. Appl. Pharmacol. | 48

Identification of Polynuclear Aromatic Hydrocarbons by Shpol’skii Low Temperature Fluorescence

A. Colmsjö, Stenberg U.
1979 | 51 (145-150)

Vacuum Sublimation of Polynuclear Aromatic Hydrocarbons Separated by Thin-layer Chromatography for Detection with Shpol’skii Low Temperature Fluorescence

A. Colmsjö, Stenberg U.
1979 | 169 (205-212)

A method for the vacuum sublimation of polynuclear aromatic hydrocarbons (PAHs) from thin-layer chromatographic plates is described. Low-temperature fluorescence spectroscope, utilizing the Shpol'skii effect, is used for the detection and identification of benzo[a]pyrene, pyrene and benzo[ghi]perylene in samples from different sources. The recoveries of these PAHs were optimized by varying the time and temperature of sublimation.

Sulfur-containing derivatives of Hexachlorobenzene (HCB) – metabolites in the rat

Jansson B; Bergman Å;
1978 | Chemosphere | 7

Convulsive properties of Lindane, Lindane metabolites, and the Lindane isomer a-Hexachlorocyclohexane: Effects on the convulsive threshold for Pentylenetetrazol and the brain content of g-Aminobutyric acid (GABA) in the mouse

Hulth L; Höglund L; Bergman Å; Möller L;
1978 | Toxicol. Appl. Pharmacol. | 46

Synthesis of methylthio- and methylsulfonyl-polychlorobiphenyls via nucleophilic aromatic substitution of certain types of polychlorobiphenyls

Bergman Å; Wachtmeister CA;
1978 | Chemosphere | 7

Synthesis of [14C]Biphenyl and of some chlorinated [14C]Biphenyls containing 4-chloro-, 2,4-dichloro- and 2,3,6-trichlorophenyl nuclei from the corresponding labelled anilines

Bergman Å; Wachtmeister CA;
1977 | Chemosphere | 6

Synthesis of methanesulfonyl derivatives of 2,2-Bis(4-chlorophenyl)-1,1-dichloroethylene (p,p’-DDE), present in seal from the Baltic

Bergman Å; Wachtmeister CA;
1977 | Acta Chem Scand | B 31

The determination of penicillins by titrations with mercury(II) solution

B. Karlberg, U. Forsman
1976 | 83 (309-316)

A simple technique, involving two titrations with mercury(II) solutions, is described for the determination of penicillins and their degradation products. The first titration, at pH 4–5 on an untreated penicillin solution, gives the amount of degradation products; the second titration, on a hydrolysed solution at the same pH, gives the sum of the degradation products and penicillin degraded during the hydrolysis. Enzymic hydrolysis is superior to alkaline hydrolysis for penicillinase-sensitive penicillins. Enzyme-resistant penicillins should be hydrolysed with alkali at optimum conditions, e.g. for cloxacillin at pH 13.5 for 5 min. A standard deviation of less than 0.5 % was obtained for the penicillins investigated. The method is absolute; calibration with standard penicillin is not necessary.

Distribution of polychlorinatd biphenyls: Structural requirements for accumulation in the mouse bronchial mucosa

Brandt I; Bergman Å; Wachtmeister CA;
1976 | Experientia | 32

Impregnation of sillica gel with tetraalkylammonium salts in adsorption chromatography of neutral aromatic compounds

Bergman Å; Göthe R; Wachtmeister CA;
1976 | J. Chromatogr. | 123

Studies on Orchidaceae Alkaloids XXXIX. Isolation of (-)-Cryptostyline I,II,III and two Quarternary Salts from Cryptostylis erythroglossa Hayata Biosynthetic studies of (-)-Cryptostyline I

Agurell S, I. Granelli, Leander K, Luning B, Rosenblom J
1974 | 28(2) (239-43)

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