Inclusive neutral vector meson production in hadronicZ0 decays

Results are reported of a study of neutral vector meson production in multihadronicZ ⁰ decays in the OPAL experiment at LEP. Pions and kaons have been identified by specific ionisation energy loss andK ^± andK ⁺ K ^– mass spectra have been fitted, in bins of the scaled momentum variablex _p , to combinations of resonance signals and non-resonant backgrounds. Rates are given forK ^*(892)° and ø(1020), and production cross sections are compared to the predictions of Monte Carlo models. Overall multiplicities have been determined as 0.76±0.07±0.06K ^*(892)° and 0.086±0.015±0.010 ø(1020) per hadronicZ ⁰ decay (the quoted errors are respectively statistical and systematic). Momentum dependent distortions of the mass spectra, possibly associated indirectly with Bose-Einstein effects, have prevented reliable measurement of the (770)° cross section in this study.     

Nitration,amination, and halogenation of Di-O-methylphloracetophenone

Chlorination of the title compound gave 5- and 3-chloro-2-hydroxy-4,6-dimethoxyacetophenone. The nitration of its acetate, followed successively by reduction, diazotization, and reaction with cuprous chloride, gave the 3-substituted series, 2-acetoxy-4,6-dimethoxy-3-nitroacetophenone, 3-amino-2-hydroxy-4,6-dimethoxyacetophenone, and 3-chloro-2-hydroxy-4,6-methoxyacetophenone, respectively. The orientation of substituents in the products was proved. The amino and chloro members of the isomeric 5-substituted series were availablevia 2-hydroxy-4,6-dimethoxy-5-phenylazoacetophenone, the product of the reaction of the title compound with benzenediazonium chloride.

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Nitrierung, Aminierung und Halogenierung von Di-O-methylphloracetophenon

Zusammenfassung Chlorierung der Titelverbindung gab 5- und 3-Chlor-2-hydroxy-4,6-dimethoxyacetophenon. Die Nitrierung des Acetats, gefolgt von Reduktion, Diazotierung und Reaktion mit CuCl ergab die 3-substituierte Reihe: 2-Acetoxy-4,6-dimethoxy-3-nitroacetophenon, 3-Amino-2-hydroxy-4,6-dimethoxyacetophenon und 3-Chlor-2-hydroxy-4,6-dimethoxyacetophenon. Die Orientierung der Substituenten wird diskutiert. Die Amino- und Chlorderivate der isomeren 5-substituierten Reihe sind über 2-Hydroxy-4,6-dimethoxy-5-phenylacetophenon zugängig, dem Produkt der Reaktion der Titelverbindung mit Phenyldiazoniumchlorid.

     

Eine Bemerkung zum Axiomensystem des Morgenstern/Thompson-Außenhandelsmodells

Zusammenfassung Es kann gezeigt werden, daß sich im Außenhandelsmodell vonMorgenstern/ Thompson gewisse Aussagen nicht unbedingt als Resultate aus dem vorgeschlagenen Axiomensystem ergeben. Werden diese Aussagen in das Axiomensystem aufgenommen, so bleibt das System unabhängig.

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Summary In the Open Expanding Economy Model ofMorgenstern/Thompson it can be shown that some of the statements do not follow from the axioms. Adding these statements to the given system of axioms the new system is still independent.

     

Synthesis of thia-ellipticine, 5,11-dimethylbenzothieno[2,3-g]isoquinoline

1,4-Dimethyldibenzothiophene (VII) was synthesized and was converted with butyl dichloromethyl ether to the 2-aldehyde (VIII). The structure was confirmed by an independent synthesis of the 2-ester (XI) derived from it. The 2-aldehyde (VIII) with aminoacetaldehyde diethylacetal formed the Schiff′s base (IX), and Pomeranz-Fritsch cyclization with 105% superphosphoric acid then formed thia-ellipticine (II), an isostere of the antitumor alkaloid, ellipticine.