TY  - CHAP
A1  - Zimmermann, U.
A1  - Stopper, Helga
T1  - Electrofusion and electropermeabilization of cells
N2  - No abstract available.
KW  - Elektrofusion
KW  - Elektroporation
KW  - Zelle
Y1  - 1987
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-73065
ER  - 
TY  - CHAP
A1  - Warburg, M. R.
A1  - Linsenmair, Karl Eduard
A1  - Bercovitz, K.
T1  - The effect of climate on the distribution and abundance of isopods
N2  - Climate affects both the distribution and abundance of isopods. Humidity and moisture affect their activity and distribution. Survival of juveniles is largely dependent on moisture. The reproductive pattern is affected by temperature and light. Food affects growth and thus, indirectly, also reproduction, as larger females tend to produce larger broods and more frequent broods than smaller ones. Generally in isopods there is little evidence to suggest that food is a very important factor affecting their abundance. Both semelparity and iteroparity are found in isopods and both reproductive strategies are apparently successful. Mortality factors affect the oocytes, the marsupial stages, and most of all the newly released individuals . Apart from climatic factors, predation and, to a lesser extent, parasitism are the main causes of mortality. Longevity of isopods ranges from one to five years. Occasional population explosions ofisopods are known to take place, their cause being unknown.
Y1  - 1984
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-44473
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
A1  - Zentgraf, Hanswalter
T1  - Morphology of nucleolar chromatin in electron microscopic spread preparations
N2  - No abstract available
Y1  - 1982
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-41155
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
A1  - Spring, Herbert
A1  - Trendelenburg, Michael F.
T1  - Organization of transcriptionally active chromatin in lampbrush chromosome loops
N2  - No abstract available
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-39293
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
A1  - Kleinschmidt, Jürgen A.
A1  - Franke, Werner W.
T1  - Transcriptional and skeletal elements in nucleoli of amphibian oocytes
N2  - No abstract available
Y1  - 1982
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-40625
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
A1  - Franke, Werner W.
T1  - Structures and functions of the nuclear envelope
N2  - No abstract available
KW  - Zellkern
Y1  - 1974
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-39777
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
A1  - Dabauvalle, Marie-Christine
T1  - Functional organization of the amphibian oocyte nucleus
N2  - No abstract available
KW  - Oogenese
Y1  - 1985
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-41178
ER  - 
TY  - CHAP
A1  - Scheer, Ulrich
T1  - Contributions of electron microscopic spreading preparations ("Miller-spreads") to the analysis of chromosome structure
N2  - No abstract available
KW  - Eukaryonten / Chromosom
Y1  - 1987
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-39625
ER  - 
TY  - CHAP
A1  - Schartl, Manfred
A1  - Erbelding-Denk, C.
A1  - Hölter, S.
A1  - Nanda, I.
A1  - Schmid, M.
A1  - Schröder, J. H.
A1  - Epplen, J. T.
T1  - High mating success of low rank males in Limia perugiae (Pisces: Poeciliidae) as determined by DNA-fingerprinting
N2  - Hierarchical structures among male individuals in a population are frequently reflected in differences in aggressive and reproductive behaviour and access to the females. In general social dominance requires large investments which in turn may have to be compensated for by high reproductive success. However, this hypothesis has so far only been sufficiently tested in small mating groups due to the difficulties of determining paternity by classical methods using non-molecular markers. DNA fingerprinting overcomes these problems offering the possibility to determine genetic relationships and mating patterns within larger groups. Using this approach we have recently shown (Schartl et al., 1993) that in the poeciliid fish Limia perugiae in small mating groups the dominant male has 100% mating success, while in larger groups its contribution to the offspring unexpectedly drops to zero. The reproductive failure under such social conditions is explained by the inability of the ex-male to protect all the females simultaneously against mating attempts of his numerous subordinate competitors.
KW  - DNS
KW  - Fingerprint-Verfahren
KW  - Lebendgebärende Zahnkarpfen
Y1  - 1993
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-87132
ER  - 
TY  - CHAP
A1  - Franke, Werner W.
A1  - Scheer, Ulrich
A1  - Zentgraf, Hanswalter
A1  - Trendelenburg, Michael F.
A1  - Müller, U.
A1  - Krohne, G.
A1  - Spring, H.
T1  - Organization of transcribed and nontranscribed chromatin
N2  - No abstract available
KW  - Tumor / Zellteilung
Y1  - 1980
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-40656
ER  -