TY - CHAP A1 - Gotz, R. A1 - Schartl, Manfred T1 - The conservation of neurotrophic factors during vertebrate evolution N2 - No abstract available KW - Physiologische Chemie Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-61964 ER - TY - CHAP A1 - Fiala, Brigitte A1 - Federle, W. A1 - Maschwitz, U. A1 - Azarae, Idris T1 - The first myrmecophytic 2-partner-system in the genus Macaranga: The association between Macaranga puncticulata and a Componotus (Colobopsis) in Malaysia N2 - No abstract available KW - Biologie Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-55144 ER - TY - CHAP A1 - Dabauvalle, M.-C. A1 - Wilken, N. A1 - Ewald, A. A1 - Kuhbier, A. A1 - Senécal, J.-L. A1 - Scheer, Ulrich T1 - Nuclear pore complex structure analyzed by immunogold EM with human autoantibodies N2 - No abstract available Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-39439 ER - TY - CHAP A1 - Schreibman, Martin P. A1 - Schartl, Manfred A1 - Kallman, Klaus D. A1 - Magliulo-Cepriano, Lucia T1 - Molecular approaches to study the genetic regulation of the fish reproductive system N2 - No abstract available. KW - Fische Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86679 ER - TY - CHAP A1 - Fiala, Brigitte A1 - Rabenstein, R. A1 - Maschwitz, Ulrich T1 - Ant-attracting plant-structures: Food bodies of SE Asian Vitaceae N2 - No abstract available KW - Pflanzen Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-55177 ER - TY - CHAP A1 - Dandekar, Thomas A1 - Argos, P. T1 - Genetic algorithms as a new tool to study protein stability N2 - No abstract available Y1 - 1993 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-29990 ER - TY - CHAP A1 - Fiala, Brigitte A1 - Maschwitz, Ulrich A1 - Tho, Yow Pong T1 - The association between Macaranga trees and ants in South-east Asia N2 - No abstract available KW - Macaranga Y1 - 1991 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-54752 ER - TY - CHAP A1 - Mahsberg, Dieter T1 - Brood care and family cohesion in the tropical scorpion Pandinus imperator (Koch) (Scorpiones: Scorpionidae) N2 - Pandinus imperator is a forest dweller of tropical West Africa. In the field, lobserved aggregations of up to 15 individuals. In the laboratory, mixed age groups of related and also unrelated animals lived jointly in terraria rarely showing within-group aggression or cannibalism. Brood-caring behavior of the mother influenced growth rate and survival probability of the young. With birth, mothers became very aggressive. To study family cohesion in Pandinus, experiments with family groups were conducted. Siblings aggregated around their mother. In choice experiments with two family groups, mothers were placed in enclosures that only the young were able to enter or to leave. Second instars significantly preferred the enclosure containing their own mother. Aggression among unrelated young of the same age was not observed. Feeding experiments studied the possible advantages of long-Iasting group living with regard to enhanced success in prey capture and its effect on growth of the young. Even groups of second instars were unable to subdue large prey on their own. Sibling groups with their mother removed suffered high mortality due to starvation and cannibalism compared to groups with mothers present. Here, young grew significantly faster: they shared the prey that only the mother was able to kill and dismember. Pandinus imperator has to be considered an intermediate subsocial scorpion. KW - Skorpion Y1 - 1990 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-45776 ER - TY - CHAP A1 - Schartl, Manfred A1 - Mäueler, Winfried A1 - Raulf, Friedrich A1 - Robertson, Scott M. T1 - Molecular aspects of melanoma formation in Xiphophorus N2 - No abstract available. KW - Schwertkärpfling KW - Krebs Y1 - 1988 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-72689 ER - TY - CHAP A1 - Riehl, Rüdiger A1 - Schartl, Manfred A1 - Anders, Fritz T1 - An ultrastructural study of melanoma in Xiphophorus N2 - Melanotic melanoma (MM) of Xiphophorus (Teleostei: Poeciliidae) was studied by conventional preparations and freeze-etch preparations for electron microscopy. MM of Xiphophorus exhibits tightly packed pigment cells with prominent dendritic processes and interdigitations of their plasma membranes. The most impressive feature of MM cells is the occurrence of Iarge lobulated nuclei with numerous nuclear pores and some nuclear pockets. Abundant spheroidal or ellipsoidal melanosomes (diameter 200-650 nm) and vesicular structures are distributed throughout the cellular dendrites, whereas the perinucJear cytoplasm is free of melanosomes. A further characteristic feature of melanoma cells in fish is the occurrence of melanosome complexes (i.e., "compound melanosomes"). These melanosome complexes consist of a few to numerous melanosomes, which are enveloped by a separate rnembrane. Pinocytotic vesicles couJd be demonstrated with distinct differences in frequency and distribution patterns, indicating differences in the metabolic activities of the cells in the same melanoma. Intercellular junctions are lacking in the MM cells. The conventional TEM technique showed clear advantages in the demonstration of intemal architecture of organelles, whereas FE bad considerable potential in respect to the visualization of membrane surface specializations. KW - Schwertkärpfling KW - Krebs KW - Ultrastruktur Y1 - 1985 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-70978 ER -