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By means of the BC NMR spectra of tricyclo{2.2.0~rfJ6Jhexane and thirteen of its derivatives the effects of substituents in endo-3- and endo-5-positions on the HC chemical shifts have been determined. The y-anti effects are at least as Jarge as in monosubstituted cyc1obutanes, where the shielding values of second-row hetero substituents exceed those in unstrained systems by far, and higher-row and carbon substituents still cause substantial upfield shifts. In the title system the y-anti effect of a substituent in the endo-3- and endo-5-position are operative additively, and thus shift the absorption of C-J upfieJd by a maximum of 27 ppm with respect to the unsubstituted hydrocarbon.
Grundzüge des rechtswissenschaftlichen Gedankenguts zur Schadenswiedergutmachung werden psychologischen Ansätzen dazu gegenübergestellt. Das Ergebnis ist die Feststellung, daß die stimulusbezogene Urteilsrelevanz der Schadenswiedergutmachung nicht in der psychologischen Forschung berücksichtigt wurde. Ein diesbezüglicher Untersuchungsansatz sollte sechs Merkmale besitzen: multifaktoriell, multivariat, Stimulus-Response-vergleichend, quantitativ, ontogenetisch und individual-diagnostisch. Er bildet den Prototyp eines die Moral positiver und negativer Akte umfassenden Ansatzes zur moralischen Urteilsbildung, des ses erste Ergebnisse beschrieben werden.
No abstract available
Kommunikation
(1983)
No abstract available
No abstract available
The total number and the number of Purkinje cells per square millimeter of the surface of the cerebellar granular layer were measured in albino rats from two strains: Chbb-THOM-Wist and Han: SPRD. The total number of the Purkinje cells in the cerebellar vermian lobules L land L X with the exception of cells in the lobules VIb + c did not. differ significantly. Statistically significant differences were found between the individuals of the two rat strains and within single lobules of the cerebella concerning the cell density of Purkinje cells per square millimeter surface of the granular layer. The results suggest heterogeneity of the cerebellar cortex between cerebellar lobules and between albino rats derived from different strains.
No abstract available
List Sprachbuch 7
(1983)
No abstract available
Jahresbericht 1982
(1983)
The hemolytic Escherichia coli strain 536 (06) propagates spontaneous hemolysin- negative mutants at relatively high rates (10-3 to 10-4 ). One type of mutant (type I) lacks both secreted (external) and periplasmic (internal) hemolysin activity (HlYex - IHlYin -) and in addition shows no mannose-resistant hemagglutination (Mrh -), whereas the other type (type II) is HlYex -IHIYin + and Mrh +. The genetic determinants for hemolysin production (hly) and for mannose-resistant hemagglutination (mrh) of this strain are located on the chromosome. Hybridization experiments with DNA probes specific for various parts of the hly determinant reveal that mutants of type I have lost the total hly determinant, whereas those of type 11 lack only part of the hlyB that is essential for transport of hemolysin across the outer membrane. Using a probe that contains the end sequence of the plasmid pHly152-encoded hly determinant (adjacent to hlyB), we determined that a related sequence flanks also the hlyB-distal end of the chromosomal hly determinant of E. coli 536. In addition several other similar or even identical sequences are found in the vicinity of the hlyC- and the hlyB-distal ends of both the chromosomal and the plasmid hly determinants.
Die Struktur von Pentacarbonyl(schwefeldioxid)chrom (1) wurde röntgenographisch aus Einkristalldaten bestimmt. Die Verbindung kristallisiert mit acht Formeleinheiten in der rhombischen Elementarzelle (Raumgruppe Pbn2\(_1\)) folgender Dimensionen: a = 657,8(2) pm, b = 1245,2(4) pm, c = 2177,4(5) pm (bei 180 K). Das Schwefeldioxid ist \(\eta^1\)-koplanar koordiniert, der Cr-S-Abstand ist mit 219 pm der kürzeste bisher gefundene Abstand zwischen Chrom(O) und Schwefel. Die Cr-C(ax)-Bindung ist mit 189 pm fast genau so lang wie die Cr-C(eq).Bindungen (190 pm), ein Beleg für das hohe \(\pi\)-Akzeptorvermögen des S0\(_2\).
Transcriptionally inactive chick erythrocyte nudei were reactivated by Sendai virusinduced fusion of erythrocytes with rat L6j1 myoblasts. We used antibodies to trace the appearance of a specific protein engaged in transcription of a defined dass of genes, those coding for rRNA, during reactivation. Using immunofluorescence microscopy, we found increasing amounts of rat RNA polymerase I to appear, during a certain period of time after fusion, in the reforming nudeoli of the chick nudei. Amounts of rat RNA polymerase I sufficient to be detected by immunofluorescence microscopy had accumulated in the newly developed chick nudeoli 72- 190 h after fusion was initiated. This time interval coincides with the time when chick rRNA synthesis can first be detected. The results raise the possibility that during these stages of the reactivation process chick rRNA genes are transcribed by heterologous RNA polymerase I moleeules of rat origin.
No abstract available
Methyldixanthogenatostibane
(1983)
Methyldixanthogenatostibane CH\(_3\)Sb(S\(_2\)COR)\(_2\) erhält man entweder durch Reaktion von Methyldibromstiban mit entsprechenden Natriumxanthogenaten bei tiefen Temperaturen (-78°C) oder durch Einschiebung von CS\(_2\) in Methyldialkoxistibane. Die Röntgenstrukturanalyse von CH\(_3\)Sb(S\(_2\)COC\(_2\)H\(_5\))\(_2\) zeigt, daß im Kristall die Chelatliganden das Antimonatom intraund intermolekular koordinieren, so daß eine pentagonal-pyramidale bzw. unter Einbezug des freien Elektronenpaars pentagonal-bipyramidale Koordination am Antimon vorliegt.
No abstract available