TY  - JOUR
A1  - Gruber, Hans
A1  - Renkl, Alexander
A1  - Schneider, Wolfgang
T1  - Expertise und Gedächtnisentwicklung: Längsschnittliche Befunde aus der Domäne Schach
N2  - Die vorliegende Arbeit ging zwei Hauptfragestellungen nach: (I) Inwiefern unterscheiden sich Experten in der Domäne Schach von Aussteigern aus der Expertisekarriere? (2) Wie verändern sich schachspezifische und generelle Gedächtnisparameter über einen Zeitraum von mehreren Jahren? Es wurden 27 Experten und Novizen mit einem durchschnittlichen Alter von knapp 12 Jahren zum ersten Meßzeitpunkt und von 16 Jahren zum zweiten Meßzeitpunkt untersucht. Die Aussteiger aus der Expertisekarriere zeigten bereits bei der Erstmessung schlechtere schachspezifische Gedächtnisleistungen als die übrigen Experten; die Annahme selektiver Aussteiger, die die Aussagekraft querschnittlicher Experten-Novizen-Vergleiche in Frage stellt, wird damit bestätigt. Sowohl für die Experten als auch für die Novizen zeigte sich ein Anstieg der schachspezifischen Gedächtnisleistung von der Erst- zur Zweitmessung. Während dafür bei Experten domänenspezifische Faktoren verantwortlich sein dürften, scheint dies bei Novizen auf die Entwicklung allgemeiner Gedächtnisparameter zurückzugehen.
KW  - Expertise
KW  - Gedächtnis
KW  - Schach
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87473
ER  - 
TY  - JOUR
A1  - Gorboulev, Valentin G.
A1  - Akhundova, Aida
A1  - Grzeschik, K.-H.
A1  - Fahrenholz, Falk
T1  - Organization and chromosomal localization of the gene for the human bombesin receptor subtype expressed in pregnant uterus
N2  - The gene encoding the human homologue of the guinea pig uterine bombesm receptor [( 1992) Eur. J. Biochem. 208,405] was isolated from a genomic lambda library by the PCR/homology screening approach. The gene spans more than 4 kb and consists of 3 exons and 2 introns. The deduced amino acid sequence shows about 86% identity to that of guinea pig bombesin receptor. This subtype of bombesin receptor is expressed in the pregnant uterus and in two human tumour cell lines, T47D (ductal breast carcinoma) and A431 (epidermal carcinoma). PCR analysis of genomic DNA from human-mouse cell hybrids allows the cloned gene to be localized to the region q26q28 on chromosome X.
KW  - Bombesin ; Bombesin receptor ; Chromosomal localization
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32572
ER  - 
TY  - JOUR
A1  - Gessler, Manfred
A1  - König, A.
A1  - Arden, K.
A1  - Grundy, P.
A1  - Orkin, S. H.
A1  - Sallan, S.
A1  - Peters, C.
A1  - Ruyle, S.
A1  - Mandell, J.
A1  - Li, F.
A1  - Cavenee, W.
A1  - Bruns, G. A.
T1  - Infrequent mutation of the WT1 gene in 77 Wilms' Tumors
N2  - Homozygous deletions in Wilms' tumor DNA have been a key step in the identification and isolation of the WTI gene. Several additional loci are also postulated to contribute to Wilms' tumor formation. To assess the frequency of WTI alterations we have analyzed the WTI locus in a panel of 77 Wilms' tumors. Eight tumors showed evidence for large deletions of several hundred or thousand kilobasepairs of DNA, some of which were also cytogenetically detected. Additional intragenic mutations were detected using more sensitive SSCP analyses to scan all 10 WTI exons. Most of these result in premature stop codons or missense mutations that inactivate the remaining WTI allele. The overall frequency of WTI alterations detected with these methods is less than 15%. While some mutations may not be detectable with the methods employed, our results suggest that direct alterations of the WTI gene are present in only a small fraction of Wilms' tumors. Thus, mutations at other Wilms' tumor loci or disturbance of interactions between these genes likely play an important role in Wilms' tumor development.
KW  - Wilms' tumor
KW  - WTI
KW  - Zinc finger gene
KW  - Tumor suppressor gene
KW  - Nephroblastoma
KW  - Deletion analysis
KW  - SSCP analysis
KW  - Mutation screening
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-34308
ER  - 
TY  - JOUR
A1  - Gerstner, E.
A1  - Kemmer, R.
A1  - Christl, Manfred
T1  - Elektrophile Additionen an das Bicyclo[1.1.0]butan-System von Tricyclo[4.1.0.0\(^{2,7}\)]-heptan-Derivaten: Halogen-Elektrophile
T1  - Electrophilic Additions to the Bicyclo[l.l.O)butane System of Tricyclo[4.1.0.0\(^{2,7}\)]heptane Derivatives: Halogen Electrophiles
N2  - No abstract available
KW  - Organische Chemie
KW  - Norpinanes
KW  - preparation
KW  - Carbocations
KW  - classical and nonclassical
KW  - Neighbouring group participation
KW  - Halonium ions
KW  - Migratory aptitudes in carbocations
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-58700
ER  - 
TY  - JOUR
A1  - Froudakis, G.
A1  - Zdetsis, A.
A1  - Mühlhäuser, M.
A1  - Engels, Bernd
A1  - Peyerimhoff, S. D.
T1  - A comparative ab initio study of the Si\(_2\)C\(_4\), Si\(_3\)C\(_3\), Si\(_4\)C\(_2\) clusters
N2  - Various structural possibilities for the Si\(_2\)C\(_4\) and Si\(_4\)C\(_2\) clusters are investigated by employing a basis set of triple-zeta plus polarization quality; electron correlation is generally accounted for by second-order M0ller-Plesset and, in certain instances, by higher-order perturbation (CASPT2) approaches. The building-up principle recently suggested from an analysis of Si\(_3\)C\(_3\) clusters is found to be fully operative for Si\(_2\)C\(_4\) and Si\(_4\)C\(_2\) clusters. A comparison of the structure and stability of various geometrical arrangements in the series C\(_6\) , Si\(_2\)C\(_4\) , Si\(_3\)C\(_3\) , Si\(_4\)C\(_2\), and Si\(_6\) shows that linear and planar structures become rapidly less stable if carbons are replaced by silicons and that the three-dimensional bipyramidal forms become less favorable as soon as silicons are exchanged by carbons in the parent Si\(_6\) structure. The effects can be rationalized in qualitative terms based on differences in silicon and carbon bonding.
KW  - Organische Chemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59097
ER  - 
TY  - JOUR
A1  - Frischholz., S.
A1  - Röllinghoff, M.
A1  - Moll, Heidrun
T1  - Cutaneous leishmaniasis: Co-ordinate expression of granzyme A and lymphokines by CD4\(^+\) T cells from susceptible mice.
JF  - Immunology
N2  - We have recently demonstrated that the frequency ofT cells expressing granzyme A is significantly higher in skin lesions and spleens of susceptible BALB/c mice compared with resistant C57BL/6 mice infected with Leishmania major, a cause of human cutaneous leishmaniasis. In the present study, we have performed in vitro studies to characterize the subpopulation, the antigen responsiveness and the lymphokine production pattern of granzyme A-expressing T cells in L. major-infected mice. Using a limiting dilution system for functional analysis of selected T cells at the clonallevel, we could show that granzyme A activity in infected BALB/c mice can be assigned to L. major-reactive CD4\(^+\) T cells secreting interleukin-2 (IL-2) and IL-4. Granzyme A production was most pronounced in the early phase of infection. On the other hand, granzyme A expression could not be detected in C57BL/6-derived T cells responding to L. major. The da ta support the suggestion that granzyme A is produced by L. major-responsive CD4\(^+\) T cells facilitating lesion formation and the dissemination of infection.
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30954
VL  - 82
SP  - 255
EP  - 260
ER  - 
TY  - JOUR
A1  - Franzek, E.
A1  - Stöber, Gerald
A1  - Beckmann, H.
T1  - Malignes neuroleptisches und lebensbedrohliches katatones Syndrom: Eine identische Komplikation im Verlauf von funktionellen Psychosen
T1  - Malignant neuroleptic syndrome and lethai catatonia: an identical complication in functional psychoses
N2  - no abstract available
KW  - Neuropsychiatrie
KW  - Malignes neuroleptisches Syndrom
KW  - akut lebensbedrohlich katatones Syndrom
KW  - perniziöse Katatonie
KW  - zykloide Psychose
KW  - Malignant neuroleptic syndrome
KW  - Iife threatening catatonic syndrome
KW  - lethai catatonia
KW  - cycloid psychosis
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82243
ER  - 
TY  - JOUR
A1  - Fischer, W. H.
A1  - Lutz, Werner K.
T1  - Short communication : Mouse skin papilloma formation by chronic dermal application of 7,12-dimethylbenz[a]anthracene is not reduced by diet restriction
N2  - No abstract available
KW  - Toxikologie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-60644
ER  - 
TY  - JOUR
A1  - Fiala, Brigitte
A1  - Linsenmair, Karl Eduard
A1  - Maschwitz, Ulrich
T1  - Diversität von Interaktionen zwischen Ameisen und Pflanzen im südostasiatischen Regenwald
T1  - Diversity of ant-plant interactions in south-east Asian rainforests
N2  - Assoziationen von Ameisen mit Pflanzen (und oft noch mit pflanzensaugenden Insekten als drittem Partner) dürften eine Ursache des Artenreichtums und der hohen Abundanzen tropischer Formicidae sein. Die von den Ameisen genutzten Pflanzen bieten entweder Nahrung an, über extraflorale Nektarien und/oder Nährkörperchen, oder aber - bei den eigentlichen Myrmekophyten - Nistraum und z.T. auch Nahrung. Diese Beziehungen zeichnen sich durch unterschiedliche Nutzungsweisen und Nutzungsintensitäten und damit stark differierende Abhängigkeit der Partner voneinander aus. Ein besonders breites Spektrum von Ameisen-Pflanzen-Assoziationen finden wir in der paläotropischen Baumgattung Macaranga (Euphorbiaceae), die sich daher als Modellsystem für vergleichende Untersuchungen hervorragend eignet. Die Grundfrage unserer Untersuchungen an diesem System lautet: Verläuft aufgrund der ausgeprägt mosaikartigen Verteilung der von den myrmekophilen Pflanzen angebotenen Nahrungs- und Nistraumressourcen die Neu- und Wiederbesiedlung von Habitaten durch die Ameisen in Form von Zufallsprozessen? Oder werden, im Gegenteil, durch diesen Umstand Spezialisierungen seitens der Ameisen gefördert und die Zusammensetzung der Lebensgemeinschaften dadurch stärker deterministisch geprägt? Unsere bisherigen Untersuchungen zeigen, daß beide Prinzipien wirken. Bei der alleinigen Nutzung von Nahrungsressourcen fehlen spezialisierte Beziehungen weitgehend und stochastische Ereignisse dürften sehr häufig die Pflanzen-Ameisen-Assoziation bestimmen. Bei den eigentlichen Myrmekophyten hingegen ist die Auswahl der assozierten Ameisen viel stärker determiniert, ganz besonders dann, wenn der Wohnraum, den die Pflanze offeriert, nur durch aktives Öffnen seitens der Ameisen erschlossen werden kann.
N2  - Associations of ants with plants can be regarded as one reason for the high abundance and diversity of ants in the tropics. The plants either provide food as extrafloral nectar and/or food bodies or, in the true myrmecophytes, nesting space and partly also food. These associations are characterized by very different forms and intensities of use of the plant resources and, therefore, also varying mutual dependency of the partners. A broad spectrum of different ant-plant associations is found in the paleotropical tree genus Macaranga (Euphorbiaceae) wh ich is therefore especially suited as a model system for a comparative investigation. The central question of our studies is: Does the mosaic character of the spatial distribution of food and nesting resources provided by the myrmecophilous plants rather favour stochastic processes during colonization of habitats by ants? Or does it, on the contrary, preferentially lead to strong specializations in the ants? Our investigations show that both principles are realized. In interactions where ants only use the food resources, specific relationships are lacking and stochastic events direct the associations. In obligate myrmecophytes, however, the colonization largely follows deterministic principles, especially when nesting space inside the plant actively has to be made accessible by the ants.
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32894
ER  - 
TY  - JOUR
A1  - Fiala, Brigitte
A1  - Grunsky, Harald
A1  - Maschwitz, Ulrich
A1  - Linsenmair, Karl Eduard
T1  - Diversity of ant-plant interactions: Protective efficacy in Macaranga species with different degrees of ant-association.
N2  - The pioneer tree Macaranga in SE Asia has developed manyfold associations with ants. The genus comprises all stages of interaction with ants, from facultative relationships to obligate myrmecophytes. Only myrmecophytic Macaranga offer nesting space for ants and are associated with a specific ant partner. The nonmyrmecophytic species are visited by a variety of different ant species which are attracted by extrafloral nectaries (EFN) and food bodies. Transitional Macaranga species like M. hosei are colonized later in their development due to their stem structure. Before the colonization by their specific Crematogaster partner the young plants are visited by different ant species attracted by EFN. These nectaries are reduced and food body production starts as soon as colonization becomes possible. We demonstrated earlier that obligate ant partners can protect their Macaranga plants against herbivore damage and vine cover. In this study we focused on nonspecific interactions and studied M. tanarius and M. hosei, representing a non-myrmecophyte and a transitional species respectively. In ant exclusion experiments both M. tanarius and M. hosei suffered significantly higher mean leaf damage than controls, 37% versus 6% in M. hosei, 16% versus 7% in M. tanarius. M. tanarius offers both EFN and food bodies so that tests for different effects of these two food rewards could be conducted. Plants with food bodies removed but with EFN remaining had the lowest mean increase of herbivore damage of all experimental groups. Main herbivores on M. hosei were mites and caterpillars. Many M. tanarius plants were infested by a shootborer. Both Macaranga species were visited by various ant species. Crematogaster spp. being the most abundant. We found no evidence for any specific relationships. The results of this study strongly support the hypothesis that non-specific, facultative associations with ants can be advantageous for Macaranga plants. Food bodies appear to have lower attractive value for opportunistic ants than EFN and may require a specific dietary adaptation. This is also indicated by the fact that food body production in the transitional M. hosei does not start before stem structure allows a colonization by the obligate Crematogaster species. M. hosei thus benefits from facultative association with a variety of ants until it produces its first domatia and can be colonized by its obligate mutualist.
KW  - Ant-plant interactions ; Herbivory Macaranga ; Mutualism ; Myrmecophytes
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32905
ER  - 
TY  - JOUR
A1  - Fackler, Guido
T1  - Ein Geschenk trostlosester Unkultur an das erste Kulturvolk der Erde : Zum Umgang mit fremdartiger Jazzmusik im Freiburg der Weimarer Republik
N2  - No abstract available
KW  - Jazz
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-41889
ER  - 
TY  - JOUR
A1  - Erbelding-Denk, Claudia
A1  - Schroder, Johannes H.
A1  - Schartl, Manfred
A1  - Nanda, Indrajit
A1  - Schmid, Michael
A1  - Epplen, Jörg T.
T1  - Male polymorphism in Limia perugiae (Pisces: Poeciliidae)
N2  - The male-polymorphic poeciliid fish, Limia perugiae, a small teleostean endemic to the southeast of the Caribbean island Hispafiola, consists of three male size morphs with uniform females. Large males differentiate at a size va:rying between 25 and 38 mm; intermediate males, between 21 and 25 mm. Under competition, !arge males exhibit an elaborate courtship display, whereas small males show only a sneak-chase behavior. Intermediate males adapt their tactics to the respective competitors. However, all malemorphs can switch from courtship display to sneak-chase behavior. In large mating groups with four males of different size and five or six virgin females, large dominant a-males as weil as small subordinate \(\delta\)-males did not produce any offspring. Unexpectedly, all progeny were sired exclusively by the intemediate subordinate ß- and \(\gamma\)-males. Breeding experiments with the three male morphs can best be explained by a model of Y -linked genes for small and !arge size which are both suspended by the activity of an autosomal recessive repressor responsible for the development of intermediate males. The dominant allele of the recessive repressor, in either its homoorits heterozygous state, activates the Y-chromosomal genes for !arge or small size, respectively. Accordingly, intermediate males may produce male offspring of all size classes, depending on the presence of either the Y-linked gene or the autosomal repressor.
KW  - Physiologische Chemie
KW  - Poeciliid fish
KW  - male size polymorphism
KW  - reproductive success
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-61573
ER  - 
TY  - JOUR
A1  - Engels, Bernd
T1  - Detailed study of the configuration selected multi-reference configuration interaction method combined with perturbation theory to correct the wave function
N2  - A reliable prediction of the isotropic hyperfine coupling constant A\(_{iso}\) is still a difficult task for ab initio calculations. In previous studies, the configuration selected multireference configuration interaction method in combination with perturbation theory to correct the wave function (MRCI/ B\(_K\)) yielded accurate isotropic hyperfine coupling constants very economically. The present study gives a detailed analysis of the MRCI/ B\(_K\) method based on the X\(^2 \pi\) state of CH as a test case. Furthermore, a comparison to various other methods such as Maller-Ptesset perturbation theory and the coupled cluster approach is made. The success of the MRCI/ B\(_K\) method in predicting isotropic hyperfine coupling constants is explained in terms of the inßuence of higher than double excitations.
KW  - Organische Chemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59019
ER  - 
TY  - JOUR
A1  - Einfeldt, S.
A1  - Heinke, H.
A1  - Behringer, M.
A1  - Becker, Charles R.
A1  - Kurtz, E.
A1  - Hommel, D.
A1  - Landwehr, G.
T1  - The growth of HgSe by molecular beam epitaxy for ohmic contacts to p-ZnSe
N2  - The structural properties of HgSe grown by molecular beam epitaxy (MBE) are investigated for different lattice mismatches to the substrate and various growth conditions. The growth rate is shown to depend strongly on the growth temperature above lOO°C as well as on the Hg/Se flux ratio. It has been found that the crystalline perfection and the electrical properties are mainly determined by the layer thickness, especially for the growth on highly lattice mismatched substrates. Changes in the surface morphology are related to growth parameters. Differences between the electrical behavior of MBE-grown and bulk HgSe are discussed. The electrical properties of HgSe contacts on p-ZnSe are investigated as a function of different annealing procedures.
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-38001
ER  - 
TY  - JOUR
A1  - Eckstein, V.
A1  - Müller-Buchholtz, W.
A1  - Ulrichs, Karin
T1  - Reaction patterns of natural xenophile antibodies in human sera with pancreatic islet cells and porcine lymphocytes
N2  - No abstract available
KW  - Chirurgie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-44742
ER  - 
TY  - JOUR
A1  - Dunster, L.M.
A1  - Schneider-Schaulies, Jürgen
A1  - Löffler, S.
A1  - Lankes, W.
A1  - Schwartz-Albiez, R.
A1  - Lottspeich, F.
A1  - ter Meulen, V.
T1  - Moesin: a cell membrane protein linked with susceptibility to measles virus infection
N2  - Measles virus is a highly contagious virus causing acute and persistent diseases in man, the receptor of which is still not weil characterized. We have isolated a monoclonal antibody (mAb), designated mAb 119, which specifically inhibits measles virus infection of susceptible celllines in a dosa-dependent manner. This antibody precipitates a protein with an apparent molecular mass of 75 kDa from 1251 surface-labeled cells and its epitope is present on human peripheral blood mononuclear cells, human celllines, and the African green monkey cellline Vero. Affinity chromatography of detergent-solubilized cell membrane proteins over a Sepharose column with covalently bound mAb 119 led to the partial purification of the 75-kOa protein. Preincubation of measles virus with this affinity-purified protein inhibited measles virus infection dose dependently. Aminoacid microseq,uencing of this protein revealed its identity with the human membrane-organizing extension spike protein moesin, a protein intra- and extracellularly associated with the plasma membrane of cells. Subsequently, an antibody raised against purified moesin (mAb 38/87) was also found to specifically inhibit measles virus infection of susceptible cells and confirmed our data obtained with mAb 119. Our data suggest that moesin is acting as a receptor for measles virus.
KW  - Immunologie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-54931
ER  - 
TY  - JOUR
A1  - Dittrich, Falk
A1  - Thoenen, Hans
A1  - Sendtner, Michael
T1  - Ciliary neurotrophic factor: pharmacokinetics and acute-phase response in rat
N2  - No abstract available
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-42639
ER  - 
TY  - JOUR
A1  - Demchuk, E.
A1  - Mueller, T.
A1  - Oschkinat, H.
A1  - Sebald, Walter
A1  - Wade, R. C.
T1  - Receptor binding properties of four-helix-bundle growth factors deduced from electrostatic analysis
N2  - Hormones of the hematopoietin class mediate signal transduction by binding to specific transmembrane receptors. Structural data show that the human growth hormone (hGH) forms a complex with a homodimeric receptor and that hGH is a member of a class of hematopoietins possessing an antiparallel 4-a-helix bundle fold. Mutagenesis experiments suggest that electrostatic interactions may have an important influence on hormonereceptor recognition. In order to examine the specificity of hormone-receptor complexation, an analysis was made of the electrostatic potentials of hGH, interleukin-2 (IL-2), interleukin-4 (IL-4), granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage colony-stimulating factor (GM-CSF), and the hGH and IL-4 receptors. The binding surfaces of hGH and its receptor, and of IL-4 and its receptor, show complementary electrostatic potentials. The potentials of the hGH and its receptor display approximately 2-fold rotational symmetry because the receptor subunits are identical. In contrast, the potentials of GM-CSF and IL-2 Iack such symmetry, consistent with their known high affinity for hetero-oligomeric receptors. Analysis of the electrostatic potentials supports a recently proposed hetero-oligomeric model for a high-affinity IL-4 receptor and suggests a possible new receptor binding mode for G-CSF; it also provides valuable information for guiding structural and mutagenesis studies of signal-transducing proteins and their receptors.
KW  - Biochemie
KW  - cytokines
KW  - electrostatic potential
KW  - hematopoietic receptors
KW  - human growth factor
KW  - interleukins
KW  - molecular recognition
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62424
ER  - 
TY  - JOUR
A1  - Dandekar, Thomas
A1  - Argos, Patrick
T1  - Amiloride-sensitive epithelial Na\(^+\) channel is made of three homologous subunits
N2  - No abstract available
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-29734
ER  - 
TY  - JOUR
A1  - Dandekar, Thomas
A1  - Argos, P.
T1  - Folding the main chain of small proteins with the genetic algorithm
N2  - No abstract available
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-29847
ER  - 
TY  - JOUR
A1  - Christl, Manfred
A1  - Türk, M.
A1  - Peters, K.
A1  - Peters, E.-M.
A1  - Schnering, H. G. von
T1  - Octahydro-1,2,3:4,5,6-dimethenopentalen-2-carbonitril, das erste Derivat eines noch unbekannten (CH)\(_{10}\)-Kohlenwasserstoffs
N2  - No abstract available
KW  - Organische Chemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-58728
ER  - 
TY  - JOUR
A1  - Christl, Manfred
A1  - Türk, M.
A1  - Peters, K.
A1  - Peters, E.-M.
A1  - Schnering, H. G. von
T1  - Octahydro-1,2,3:4,5,6-dimethenopentalene-2-carbonitrile, the First Derivative of a Yet-Unknown (CH)\(_{10}\)-Hydrocarbon
N2  - No abstract available
KW  - Organische Chemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-58731
ER  - 
TY  - JOUR
A1  - Christl, Manfred
A1  - Leß, Roland
A1  - Müller, Heinrich
T1  - 6,7-Dimethylene-2,4-diphenylbicyclo[3.2.l]oct-3-en-2-yl Anion : A Test for the Origin of the Unusual Properties of the Bicyclo[3.2.l]octa-3,6-dien-2-yl Anion
N2  - No abstract available
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31547
ER  - 
TY  - JOUR
A1  - Christl, Manfred
A1  - Gerstner, E.
A1  - Kemmer, R.
A1  - Llewellyn, G.
A1  - Bentley, T. W.
T1  - Elektrophile Additionen an das Bicyclo[1.1.0]butan-System von 1-Phenyl- und 1-(4-Anisyl)tricyclo[4.1.0.0\(^{2,7}\)]heptan: Säure-katalysierte Reaktionen mit Wasser und  Methanol, Anlagerung von Essigsäure und Oxymercurierung
N2  - No abstract available
KW  - Organische Chemie
KW  - 6-Norpinanols
KW  - 6-aryl-
KW  - preparation
KW  - 6-Norpinyl 3
KW  - 5-dinitrobenzoates
KW  - hydrolysis
KW  - Carbocations
KW  - generation and rearrangement
KW  - 2-Norcaranols
KW  - 1-aryl-
KW  - Cyclohept-3-en-1-ols
KW  - 3-aryl-
KW  - conformation
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-58696
ER  - 
TY  - JOUR
A1  - Christl, Manfred
A1  - Braun, Martin
A1  - Wolz, E.
A1  - Wagner, W.
T1  - Cycloallene, 9 - 1-Phenyl-1-aza-3,4-cyclohexadien, das  erste Isodihydropyridin: Erzeugung und Abfangreaktionen
T1  - Cycloallenes, 9 - 1-Phenyl-1-aza-3,4-cyclohexadiene, the First Isodihydropyridine: Generation and Interception
N2  - No abstract available
KW  - Organische Chemie
KW  - Isoquinolines
KW  - hexahydro-
KW  - Cyclobuta[c}pyridines
KW  - hexahydro-
KW  - Cycloadditions
KW  - [2 + 2]- and [4 + 2]-
KW  - 3-Azabicyclo{3
KW  - 1
KW  - 0]hexane
KW  - 6
KW  - 6-dibromo-3-phenyl-
KW  - 2
KW  - 4-Pentadienylamine
KW  - 3-n-butyl-N-phenyl-
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-58714
ER  - 
TY  - JOUR
A1  - Blackenhorn, Wolf U.
A1  - Perner, Dirk
T1  - Heritability and repeatability of behavioural attributes affecting foraging success and fitness in water striders
N2  - Heritabilities and repeatabilities are presented for various behavioural attributes affecting foraging performance and fitness in Aquarius (Gerris) remigis (Heteroptera: Gerridae) females. These behavioural attributes were patch choice, foraging success, capture accuracy, and measures of mobility, activity, skittishness and aggressiveness. Most heritabilities were not significantly different from zero, which may be related to the low sampIe size. Conclusions as to the potential of direct selection on behaviour in this species were consequently limited. In contrast, with a few exceptions (capture accuracy, foraging success), most repeatabilities were significant and at times high (range=O'22-O'79), indicating consistent, stereotypical individual behaviour. Tbe Iife history or reproductive state of the daughter generation individuals signifieantly affected the magnitude of the repeatabilities as weil as the mean values of many of the variables (notably mobility and aggressiveness), the latter in a manner consistent with field observations. This indicates that the state of the organism affects the general environmental variance, thus contributing to the discrepancies between the repeatabilities and the heritabilities obtained. It is suggested that common physiological proeesses (e.g. hormones) may underlie several of the behavioural attributes examined, resulting in possible pleiotropie effects and eonstraints on selection in a heterogeneous environment. It is further suggested that field studies of selection on behavioural attributes may be a more fruitful approach in this species, whose suitability for genetic analysis is limited.
KW  - Teichläufer
KW  - Wasserläufer
KW  - water strider
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-52496
ER  - 
TY  - JOUR
A1  - Bjorklund, David F.
A1  - Schneider, Wolfgang
A1  - Cassel, William S.
A1  - Ashley, Elizabeth
T1  - Training and Extension of a Memory Strategy: Evidence for Utilization Deficiencies in the Acquisition of an Organizational Strategy in High- and Low-IQ Children
N2  - 143 9- and 10-year-oId children were classified into high- and Jow-IQ groups and given 4 different sort/recall lists (baseline, training, near [immediate] extension, far [l-week] extension) to assess training and extension of an organizational memory strategy. All children received categorized items of moderate typicality for Phases 1, 3, and 4. For Phase 2, children were assigned to either a training or control group, with half of the children in each group receiving category typical items and the others category atypical items. Levels of recall, sorting, and clustering were greater in Phase 2 for high-IQ children, for the typical lists, and for trained children. Both the high- and low-IQ children trained with typical items continued to show high levels of recall on the near extension phase. No group of subjects maintained high levels of recall after 1 week, although levels of sorting and/or clustering on the extension trials remained high for all groups of subjects except the low-IQ control children. This latter pattern (elevated sorting/clustering with low levels of recall) is an indication of a utilization deficiency, a phase in strategy development when children use a strategy but gain little or no benefit n performance. The results provide evidence for IQ, training, and material effects in the demonstration of a utilization deficiency.
KW  - Psychologie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62234
ER  - 
TY  - JOUR
A1  - Bentley, T. W.
A1  - Christl, Manfred
A1  - Kemmer, R.
A1  - Llewellyn, G.
A1  - Oakley, J. E.
T1  - Kinetic and Spectroscopic Characterisation of Highly Reactive Methanesulfonates. Leaving Group Effects for Solvolyses and Comments on Geminal Electronic Effects Influencing S\(_N\)1 Reactivity
N2  - Highly reactive methanesulfonates (mesylates, ROMs) have been prepared from 1-phenylethanol. cyclohex-2-en-1-ol, diphenylmethanol and p-methoxybenzyl alcohol by treatment with methanesulfonyl chloride and triethylamine in dichloro- or trichloro-methane at - 20 to 0 °C. The mesylates. characterised in solution by \(^1\)H and \(^{13}\)C NMR at -20 °C, were obtained in satisfactory purity (ca. 95%) in cold solutions but they decomposed by reaction with chloride, triethylamine or the parent alcohol. Rate constants for solvolyses in aqueous acetone and aqueous ethanol have been determined by a fast response conductimetric method. Product selectivities for solvolyses of pmethoxybenzyl mesylate in aqueous ethanol and methanol at 0 °C have been determined by HPLC. From additional new or Iiterature kinetic data for solvolyses of corresponding bromides. chlorides and p-nitrobenzoates (OPNB). Br/CI. OMs/Br and OMs/OPNB rate ratios were calculated; the results are consistent with electronic effects stabilising the carbocationic transition states and increasing OMs/Br rate ratios for these SN 1 solvolyses; none of the evidence supports a geminal electronic effect on Br/CI rate ratios (e.g. caused by stabilisation of the initial state in pmethoxybenzyl chloride). Steric effects on ester /halide rate ratios for solvolyses of tertiary substrates are confirmed. Relative rates over a 10\(^{16}\) range for ester and halide leaving groups are evaluated for solvolyses of 1-phenylethyl substrates in 80% ethanol-water. updating previous work by Noyce et al. (1972).
KW  - Organische Chemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-58748
ER  - 
TY  - JOUR
A1  - Becker, T.
A1  - Schmidtke, A.
A1  - Stöber, Gerald
A1  - Franzek, E.
A1  - Teichmann, E.
A1  - Hofmann, E.
T1  - Hyperintense Marklagerläsionen bei psychiatrischen Patienten: räumliche Verteilung und psychopathologische Symptome
T1  - Hyperintense white matter lesions in psychiatrie patients: spatial distribution and psychopathological symptoms
N2  - In einem Kollektiv von 130 MR-tomographisch untersuchten psychiatrischen Patienten (axiale T2-SE-Sequenz) wurden Zahl und räumliche Verteilung von hyperintensen Marklagerläsionen ("white matter lesions"; WM L) erfaßt und die Ventricle-to-brain-Ratio (VBR) bestimmt. Eine Konfigurationsfrequenzanalyse auf der Grundlage der räumlichen WMLVerteilung erlaubte die Abgrenzung von vier Patientengruppen: 1. keine WML (n = 35), 2. WML rechts frontotemporal (n = 23), 3. WML bifrontal (n = 12), 4. WML ubiquitär (n = 16). Die während 3 Jahren beobachteten psychopathologischen Symptome dieser Patienten wurden retrospektiv nach dem AMDP-Systemdokumentiert. In der Gruppe mit ubiquitären WML überwogen organisch-psychopathologische Ttems, die VER war größer als in den anderen Gruppen (ANOVA;p < 0,001). Die räumliche W M L- Verteilung erklärte 10,24 % der Gesamtvarianz psychopathologischer M erkmalsverteilung in den Gruppen. Das Patientenalter (MANCOVA; p < 0,021), nicht aber die VER hattesignifikanten Einfluß auf das psychopathologische Symptomprofil. Nach Ausblendung der Patientengruppe mit ubiquitären WMLblieb der Einfluß der WML-Verteilung auf die psychopathologische Symptomatiksignifikantc (p <0,05). Bifrontale WML waren mit Denkstörung, rechts frontotemporale WML mit affektiven Symptomen assoziiert. Die Befunde sprechen für einen Einfluß der räumlichen Verteilung unspezifischer Marklagerläsionen auf die psychopathologische Symptomatik.
N2  - In a sampie of 130 patients who had undergone MRI (transverse TIweighted SE sequenee) patchywhite matter lesions (WML) were documented according to number and spatial distribution in the brain. Ventricle-to-Brain Ratio (VBR) was determined. Configural frequency analysis led to delineation of four patient groups on the basis of WML 10-cation: 1. no WML (n = 35), 2. right frontal-temporal WML (n = 23), 3. bifrontal WML (n = 12),4. WML in all/all but one brain region (n = 16). Psychopathological symptoms reported in the course of a maximum of 3 years were documen ted by chart review. In the 'pervasive WML' group psychopathological items characteristic of organic brain syndromes prevailed, mean VER exceeded values in all other groups (ANOVA, p < 0.001). WML spatial distribution accounted for 10.2 % oftotal psychopathological variance. Patient age, but not VER, had a significant impact on symptom profile (MANCOVA). When the 'pervasive WML' group was excluded, the finding of a significant effect of WML location on psychopathological symptom profiles was robust. Bifrontal WML were associated with thought incoherence, right frontal-temporal WML with affective symptoms. Findings support an impact of spatial distribution of unspecific WML on psychopathological symptoms in psychiatrie patients.
KW  - Medizin
KW  - Psychopathologie
KW  - MRT
KW  - Demyelinisierung
KW  - Periventrikuläre Hyperintensitäten
KW  - Hyperintense Marklagerläsionen
KW  - MRI
KW  - Demyelination
KW  - Periventricular hyperintensities
KW  - Hyperintense white matter lesions
KW  - Psychopathology
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-78288
ER  - 
TY  - JOUR
A1  - Becker, T.
A1  - Franzek, E.
A1  - Jost, C.
A1  - Hofmann, E.
A1  - Schneider, M.
A1  - Stöber, Gerald
T1  - Hirnläsionen bei affektiven Erkrankungen: eine retrospektive CT-Studie
T1  - Cerebral Lesions in Affective Disorders: a Retrospective CT Study
N2  - 46 Patienten mit affektiven Erkrankungen und pathologischem CT wurden untersucht (Infarkt: 22, Kontusion: 6, Leukoaraiose: 11, frühkindlicher Hirnschaden: 7). Monopolar Depressive (DSMIII- R; MD) zeigten oft Leukoaraiose, Infarkte waren mit MD, Kontusionen und frühkindliche Schäden mit bipolarer Erkrankung assoziiert (BP; ANCOV A, p< .1). Kortikale Läsionen waren bei BP häufiger, jedoch fehlten signifikante Effekte von Läsionsort oder -zeitpunkt auf die Polarität der Erkrankung (ANOV A). Bei einigen Infarktpatienten kam es zur Verlaufsänderung (Chronifizierung, Bipolarität) nach Infarkt, alle Post-Infarkt-Ersterkrankungen waren bipolar.
N2  - 46 patients with affective disorder and a pathologic CT scan were studied (infarct: 22, brain trauma: 6, leukoaraiosis: 11 , perinatal brain damage: 7). Unipolar depressives (DSM-I1I-R; MD) frequently had le ukoaraiosis, brain infarct was associated with unipolar depression , brain trauma and perinatal damage with bipolar illness (BP; ANCOV A , p < .1). Corticallesions were more frequ ent in BP, but ANOV A revealed no significant effect of lesion location and time of insu lt on illness polarity. In some patients with stroke course of illness changed (Ionger phases, bipolarity), first onset post-stroke went along with bipolar illness.
KW  - Psychiatrie
KW  - Klinische Psychiatrie
KW  - Gemeindepsychiatrie
KW  - organische affektive Störungen
KW  - Hirninfarkt
KW  - Kontusion
KW  - Frühkindlicher Hirnschaden
KW  - Leukoaraiose
KW  - Secondary affective disorder
KW  - Poststroke depression
KW  - Brain trauma
KW  - Perinatal brain damage
KW  - Leukoaraiosis
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82237
ER  - 
TY  - JOUR
A1  - Argos, P.
A1  - Dandekar, Thomas
T1  - Delineating the main chain topology of four-helix bundle proteins using the genetic algorithm and knowledge based on the amino acid sequence alone
N2  - No abstract available
KW  - Proteine
KW  - Strukturanalyse
KW  - Abstandsmessung
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33807
ER  -