TY - JOUR A1 - Wilhelm, Gernot T1 - Eine hurritische Sammlung von danānu-Omina aus Ḫattusa N2 - No abstract available. KW - Churritisch Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87709 ER - TY - JOUR A1 - Wilhelm, Gernot T1 - Die š u - d i n g i r - r a - Krankheit als Hauptmangel innerhalb der Gewährfrist bei Sicherheitsleistung in Form einer Sklavin N2 - No abstract available. KW - Sklavenhandel Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87695 ER - TY - JOUR A1 - Opwis, K. A1 - Gold, A. A1 - Schneider, Wolfgang T1 - Möglichkeiten der Kreuzvalidierung von Strukturgleichungsmodellen T1 - Cross-validating structural equation models: Problems and perspectives T1 - Possibilites de validation croisee pour des modeles d'equation structurale N2 - Die Beurteilung der Angemessenheit theoretischer Oberlegungen auf der Grundlage statistischer Hypothesentests ist für die empirische Forschung von zentraler Bedeutung. Im Mittelpunkt der Arbeit stehen die mit der Testung von multivariaten Strukturgleichungsmodellen (LISREL-Modelle) verbundenen Probleme. Zu Beginn wird das LISREL-Modell unter den Aspekten der simultanen Analyse von Kovarianzund Mittelwertstrukturen und der Modelltestung diskutiert. Anschließend werden anhand eines Illustrationsbeispiels aus der pädagogisch-psychologischen Forschung verschiedene Vorgehensweisen der Kreuzvalidierung einander gegenübergestellt und an empirischen Daten demonstriert. Es zeigt sich, daß die Obernahme exakter numerischer Parameterwerte sowohl aufgrund inhaltlicher wie auch formaler Argumente unangemessen streng erscheint. Diese Einschätzung kann empirisch belegt werden, indem eine Approximation von Intervallrestriktionen vorgenommen wird. N2 - This study focuses on the problem of how to judge the adequacy of theoretical models on the basis of statistical hypothesis testing procedures. In particular, problems of testing multivariate structural equation models (LISREL-models) are discussed. In a first step, the possibilities of simultaneously analyzing covariance and mean structures and of testing LISREL models are discussed . Next, data from a study conducted in the field of educational psychology are used to illustrate different procedures of cross-validating LISREL models. As it turns out, the usual restriction to base the model on equivalent numerical parameter values appears to be inappropriately rigorous. Thus, the suggestion is that cross-validations of structural equation models should rely on approximations of interval restrictions instead. N2 - Le jugement de l'appropriation des modeles theoriques base sur des tests d'hytheses statistiques est d'une importance capitale pour la recherche empirique . Les problemes lies a la verification de modeJes muJtivariants d'equation structurale sont au cen tre de cette etude. On trouve pour commencer une discussion sur le modele LISREL sous l'aspect de l'analyse simultanee de structures de covariance et de valeur moyenne et sous celui de la verification du modele. Suit ne comparaison de differents procedes de validation croiée. demontree d'apres des donnees empiriques et illustree par des exemples pris dans Ja recherche psychopedagogique. Il en ressort que la reprise de parametres numeriques exacts parait inadequate dans sa rigueur en raison d'arguments concernant tant le fond que la forme. Cette evaluation peut etre prouvee de facon empirique en faisant une approximation des restrictions d'intervalles. KW - Kreuzvalidierung KW - Strukturgleichungsmodell Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87377 ER - TY - JOUR A1 - Schneider, Wolfgang A1 - Körkel, Joachim A1 - Vogel, Klaus T1 - Zusammenhänge zwischen Metagedächtnis, strategischem Verhalten und Gedächtnisleistungen im Grundschulalter: Eine entwicklungspsychologische Studie N2 - In der vorliegenden Studie wurde die Frage geprüft, inwieweit Schulanfänger im Vergleich zu fortgeschrittenen Grundschülern tatsächlich nur wenig darüber wissen, welche Strategien in freien Reproduktionsaufgaben (son-recall) voneilhaft sind. Zu diesem Zweck wurde das Metagedächtnis von Zweit- und Vienkläßlern, also ihr Wissen um die Vorteile unterschiedlicher Sortier- und Lernstrategien, mit ihrem Lernverhalten bzw. ihrem Leistungsvermögen in unterschiedlichen Varianten der sort-recall-Aufgabe verglichen. Diese Prozedur gestattete es, die Bewertung unterschiedlicher Strategien direkt mit ihrer jeweiligen Wirksamkeit zu vergleichen. Die an je 32 Zweit- und Viertkläßlern gewonnenen Befunde: lassen sich insgesamt so interpretieren, daß die jüngeren Kinder kaum etwas über angemessene Verhaltensweisen bei freien Reproduktionsaufgaben wissen; sie ziehen perzeptuelle Organisationsstrategien konzeptuellen (taxonomischen) Organisationsstrategien vor, profitieren tatsächlich jedoch signifikant mehr von konzeptuellen Strategien. Demgegenüber verfügten die: Vienkläßler in der Regel über angemessenes Metagedächtnis: sie schätzten taxonomische Strategien nicht nur höher ein, sondern profitierten auch de facto deutlich mehr von solchen Techniken. Die Befunde können insgesamt als Bestätigung der in der neueren Literatur verbreiteten Annahme gewertet werden, daß sich das Wissen um Gedächtnisanforderungen bei sort-recall-Aufgaben erst gegen Ende: der Grundschulzeit herausbildet. KW - Metagedächtnis KW - Verhalten KW - Gedächtnisleistung KW - Grundschulkind Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87368 ER - TY - JOUR A1 - Schartl, Manfred A1 - Schröder, Johannes Horst T1 - A new species of the genus Xiphophorus Heckel 1848, endemic to northern Coahuila, Mexico (Pisces: Poeciliidae) N2 - Xiphophorus meyeri n. sp. is described as an endemic to Muzquiz, Coahuila, Mexico. It appears to be the northernmost species of the genus. The new species is related to X. couchianus and X. gordoni, but differs morphologically from those by dorsal fin ray number, by the expression of some gonopodial features and most markedly by the appearance of macromelanophores or tr-melanophores. KW - Schwertkräpfling KW - Coahuila Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87117 ER - TY - JOUR A1 - Dickneite, G. A1 - Schorlemmer, H. U. A1 - Sedlacek, H. H. A1 - Falk, W. A1 - Ulrichs, Karin A1 - Müller-Ruchholtz, W. T1 - Suppression of macrophage function and prolongation of graft survival by the new guanidinic-like structure, 15-deoxyspergualin N2 - No abstract available. KW - Makrophage Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86991 ER - TY - JOUR A1 - Foerster, Wolfgang A1 - Schartl, Manfred T1 - Karyotype and isozyme patterns of five species of Aulonocara REGAN, 1922 N2 - No abstract available. KW - Aulonocara KW - Karyotyp KW - Isoenzym Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86774 ER - TY - JOUR A1 - Peschke, Klaus A1 - Mahsberg [geb. Krapf], Dieter A1 - Fuldner, Dietrich T1 - Ecological separation, functional relationships, and limiting resources in a carrion insect community N2 - 1. Thr ecological separation of 19 carrion inscet species (adults and some of their larvae) was investigated at rabbit carcasses in North Bavaria (FRG) referring to 4 niche dimensions. In the (1.) macrohabitats (forest - clearing) the distribution of saprophageous beetle larvae was mainly considered, for (2.) seasonality the differential abundance of blow flies (Colliphoridae). (3.) The stages of decay were correlated with the temperature dependent development of blow fly maggots affecting the abundance of competing saprophageous beetles and of carnivors preying upon maggots of different size classes. By using ( 4.) microhabitats (spatial subdivision of a carcass) as further niche dimension, the dustering of speries using similar food resources was domonstrated in a niche overlap dendrogram. 2. The quantitative effect of predators on blow fly maggots was investigated both in field and laboratory experiments. Predation upon maggots rcduces their scramble competition, resulting in a higher pupal weight. Thus, the reproductive succcss of the blow flies seems to be buffered by the developmental flexibility of the calliphorids. The numerical effect of predators and parasitoids on the blow fly pupae was also quantified. 3. In a case study on the staphylinid beetle, Aleochara curtula, we investigated the diffenntial abundance of sexes. The ratio at which the males and females arrive at the carcass is balanced. Here the beetles feed and copulated. Females depart into the vicinity of the carrion much earlier than males, thus shifting the sex ratio to a maale bias. In the surroundings the females deposit their eggs, and the parasitoid first instar larvae search for scattered blow fly pupae. The temporal and spatial distribution of both sexes of A. curtula is thus not only affected by the food allocation of the adults, but a.lso by limiting resources of mating end egg laying sites as well as larval hosts. KW - Aaskäfer Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86361 ER - TY - JOUR A1 - Paakkari, I. A1 - Sirén, Anna-Leena A1 - Nurminen, M.-L. A1 - Svartström-Fraser, M. T1 - Injection of thyrotropin releasing hormone into the locus coeruleus increases blood pressure N2 - Thyrotropin releasing hormone (TRH), 10 pmol kg-1 injected in the region of locus coeruleus, caused a rapid (within 1 min) rise of mean arterial pressure in the urethane- naesthetized rat. No clear-cut effects in heart rate or ventilation were observed. When TRH was injected into the lateral ventricle, a dose more than 10-fold higher was required to achieve a comparable rise in arterial pressure. It is concluded that TRH may have a physiological rote in centrat cardiovascular regulation. KW - Thyreotropin-Releasinghormon KW - Blutdruck KW - Locus coeruleus KW - TRH KW - blood pressure KW - locus coeruleus Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-72894 ER - TY - JOUR A1 - Wilhelm, Gernot A1 - Zaccagnini, C. T1 - T. Karrāna 3, T. Ḫirbat Ṣālih: 2nd Campaign N2 - no Abstract available KW - Alter Orient KW - Kultur KW - Assyriologie KW - Geschichte Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82943 ER - TY - JOUR A1 - Wilhelm, Gernot A1 - Fales, M. A1 - Tusa, S. A1 - Zaccagnini, C. T1 - T. Karrāna 3, T. Ǧīkān and T. Ḫirbat Ṣālih: 1st Campaign N2 - no Abstract available KW - Alter Orient KW - Kultur KW - Assyriologie KW - Geschichte KW - Zeitschrift Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-85823 ER - TY - JOUR A1 - Wilhelm, Gernot A1 - Boese, J. T1 - Absolute Chronologie und die hethitische Geschichte des 15. und 14. Jahrhunderts v. Chr. N2 - no Abstract available KW - Chronologie KW - Kongress KW - Göteborg <1987> Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-85804 ER - TY - JOUR A1 - Wilhelm, Gernot T1 - Zum hurritischen Infinitiv in Nuzi N2 - no Abstract available KW - Churritisch Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-85790 ER - TY - JOUR A1 - Hacker, Jörg A1 - Ulmer, E. A1 - Fasske, E. A1 - Schmidt, G. T1 - Isolation and characterization of coliphage Omega18A specific for Escherichia coli O18ac strains N2 - The bactedophage Q18A, specific for Escherichia coli 018ac srrains, was isolated frorn sewage. The results of host range and conjugation experiments showed that the sensitivity of bacteria to the phage is associated with rhe presence of 018ac antigens. With sorne of rhe 018 strains rhe phage Q18A produces clear Iysis on bacterial lawns only when applied at a high multiplicity and moreover the phage does not multiply. With rhe help of the phage Ql8A, E. coli 0 18ac strains could be divided inro rwo serologically clistinct subgroups called 018A and 018A1• E. coli strains belanging to the sugroup 0 ISAare sensitive to phage Q t8A wheteas bacteria of subgroup A1 are resistanr. N2 - Der Bakteriophage Q18A, der spezifisch Escherichia coli 018ac Bakterien lysierr, wurde aus Abwasser isoliert. Die Untersuchungen des Wirtsbereichs und Konjugationsversuche zeigten, daß die Sensitivität der Bakterien gegenüber dem Phagen mit dem Vorhandensein des 0 '18ac Antigens assoziiert ist. Bei eir1igen 0 18 Stämmen wird nur bei Anwendung hoher Phagenkonzentrationen eine klare Lysis auf dem Bakterienrasen erzeugt. Darüber hinaus läßt sich der Phage auf diesen Stämmen nicht vermehren. Mit Hilfe des Phagen Q l8A konnten E, wli 0 18ac Stämme in zwei serologische Subgruppen unteneilt werden, die als 0 lHA und 0 l8A 1 bezeichnet werden. E. coli Bakterien der Subgruppe 0 ISA sind gegenüber dem Phagen Ql8A sensitiv und diejenigen der Subgruppe 0 18A 1 sind resistent. KW - Escherichia coli Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-73001 ER - TY - JOUR A1 - Labroo, V. M. A1 - Cohen, L. A. A1 - Lozovsky, D. A1 - Sirén, Anna-Leena A1 - Feuerstein, G. T1 - Dissociation of the cardiovascular and prolactin-releasing activities of TRH by histidine replacement N2 - No abstract available KW - Neurobiologie Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-63253 ER - TY - JOUR A1 - Feuerstein, G. A1 - Leader, P. A1 - Sirén, Anna-Leena A1 - Braquet, P. T1 - Protective effect of PAF-acether antagonist, BN 52021, in trichothecen toxicosis N2 - Trichothecenes are mycotoxins which produce Iethai toxicosis in humans and animals, yet no adequate therapeutic regimen has been developed. This study provides evidence that the selective platelet activating factor (PAF) antagonist, BN 52021 (5-15 mg/kg i.v.) can prolong the survival of conscious rats exposed to a highly Iethai T -2 toxicosis. These data also suggest that P AF is an important mediator of this unique toxicosis. KW - Neurobiologie KW - T-2 toxin KW - mycotoxin KW - PAF-acether KW - BN 52021 KW - rat Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-63244 ER - TY - JOUR A1 - Zimmermann, U. A1 - Stopper, Helga T1 - Elektrofusion und Elektropermeabilisierung von Zellen : Eine neuartige Methode der Biotechnologie zur gezieltenVeränderung der genetischen Eigenschaften von Zellen N2 - No abstract available KW - Toxikologie Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-63514 ER - TY - JOUR A1 - Holler, E. A1 - Fischer, H. A1 - Weber, C. A1 - Stopper, Helga A1 - Steger, H. A1 - Simek, H. T1 - A DNA polymerase with unusual properties from the slime mold Physarum polycephalum N2 - Two forms of a DNA polymerase have been purified from microplasmodia of Physarum polycephalum by poly(ethyleneimine) precipitation and chromatography on DEAE-Sephacel, phosphocellulose, heparin Sepharose, hydroxyapatite, DNA-agarose, blue-Sepharose. They were separated from DNA polymerase cx on phosphocellulose and from each other on heparin-Sepharose. Form HS1 enzymewas 30-40% pure and form HS2 enzyme 60% with regard toprotein contents of the preparations. Form HS2 enzymewas generated from form HS1 enzyme on prolonged standing of enzyme preparations. The DNA polymerases were obtained as complexes of a 60-kDa protein associated with either a 135-kDa (HS1) or a 110-kDa (HS2) DNA-polymerizing polypeptidein a 1:1 molar stoichiometry. The biochemical function of the 60-kDa protein remained unknown. The complexes tended to dissociate during gradient centrifugation and during partition chromatography as weil as during polyacrylamide gradient gel electrophoresis under nondenaturing conditions at high dilutions of samples. Both forms existed in plasmodia extracts, their proportions depending on several factors including those which promoted proteolysis. The DNA polymerases resembled eucaryotic DNA polymerase ß by several criteria and were functionally indistinguishable from each other. It is suggested that lower eucaryotes contain repair DNA polymerases, which are similar to those of eubacteria on a molecular mass basis. KW - Toxikologie Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-63501 ER - TY - JOUR A1 - Stopper, Helga A1 - Jones, H. A1 - Zimmermann, U. T1 - Large scale transfection of mouse L-cells by electropermeabilization N2 - Mouse L-cells were transfected by electropenneabilization using the selectable plasmid pSV2-neo which confers resistance to G-418 (Geneticin). 1be DNA concentration used was 1 l'gfml, the field strength was 10 kV fcm, the duration of the pulse was S ~s. Transfeetion yield was optimal at a temperature of 4°C when using a time in between consecutive pulses of 1 minute compared to shorter (of the order of seoonds) or Ionger (3 minutes) time intervals. A more detailed study of the relationship between the number of pulses applied (up to 10) and transfection yield showed it to be almost linear in this range at 4 o C. The yield of transfectants in response to 10 pulses was up to 1000 per 106 cells (using 3.3 pg DNA per cell). The inßuence of the growth phase of the cells on the transfection yield and I or the subpopulation of the mouse L--ceU line used was shown. Furthennore the clone yield depended on the DNA per ceU ratio within a very small range. KW - Toxikologie KW - Electrical breakdown KW - Electropermeabilization KW - Volume distribution KW - Gene transfer KW - Transfection KW - (Mouse L-cell) Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-63497 ER - TY - JOUR A1 - Barnekow, A. A1 - Paul, E. A1 - Schartl, Manfred T1 - Expression of the c-src protooncogene in human skin tumors N2 - No abstract available KW - Physiologische Chemie Y1 - 1987 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-61870 ER -