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Found 7 results.

Fresh weight of Ulva lacinulata's biomass during the degradation experiment

This dataset presents the fresh weight of U. lacinulata's biomass during the degradation experiment. This allowed the calculation of relative growth rates (RGR).

Diameter of the larger green cells found in the thalli of Ulva lacinulata and Ulva compressa that became protoplasts after being released to the water

This dataset presents the diameter of the larger green cells found in the thalli of Ulva lacinulata and Ulva compressa that became protoplasts after being released to the water.

Number of germinated individuals that originated from protoplasts from Ulva lacinulata and Ulva compressa

This dataset presents the number of germinated individuals that originated from protoplasts from Ulva lacinulata and Ulva compressa. The individuals are separated into different morphologies (unattached discs and unattached germlings). Unattached discs are also separated into the color they presented at the end of the experiment to indicate fertility. Green discs: not fertile; Brown discs: fertile; White discs: dead discs after gamete release. This allowed to calculate the germination rate, morphology ratios and percentage of fertility.

Number of protoplasts collected during the degradation experiment with Ulva lacinulata and Ulva compressa

This dataset presents the number of protoplasts collected during the degradation experiment with Ulva lacinulata and Ulva compressa. This allowed the calculation of protoplast yields.

Naturally occurring protoplasts in two Ulva spp. - Disc sizes from discs grown from protoplasts, after 35 days of germination, under culture conditions

Degradation in Ulva lacinulata and reproduction in Ulva compressa were observed and described for four weeks. The natural occurrence of protoplasts in both species was found. Protoplast yields were calculated each week for several weeks. At the beginning of the experiment, heterogeneity of the thallus was visible under the microscope. The diameter of the cells in the thalli that later became protoplasts were measured. A germination experiment was performed after protoplasts were collected. Germination rates were calculated based on the number of individuals visible by the naked eye at the end of the experiment. 2 % (U. lacinulata) and 4 % (U. compressa) of protoplasts germinated into two morphologies: unattached germlings and unattached discs. Because discs released gametes early in their development, their diameter was measured to estimate the gametes yields produced at the end of the experiment. During degradation of U. lacinulata, we found an increase in biomass after the first two weeks of the experiment. Fresh weight measurements were taken each week and relative growth rates were calculated. Our results provide the first evidence of the natural production of protoplasts in Ulva spp. and estimate that higher seeding yields can be obtained by natural protoplast production than direct gametogenesis.

Einsatz interoperabler GIS fuer die ATKIS-Produktion (ATKIS auf Jupiter)

Ziele: - kundengerechte Abgabe der Daten des Amtlichen Topographisch-Karthographischen Informationssystems (ATKIS) -effiziente und kostenguenstige Datenproduktion - weitgehend herstellerunabhaengige Datenspeicherung - Umstellung der vorhandenen proprietaeren ATKIS-Produktionsumgebung auf eine offene zukunftsorientierte Umgebung Loesung mit Hilfe neuester, interoperabler GIS- und Datenbankkomponenten, z.B. der auf WindowsNT basierenden 'Jupiter-Technologie' die Intergraph Realisierung der vorgeschlagenen ATKIS-Produktionsumgebung. Methoden: - Definition von Arbeitsablaeufen Abgrenzung der einzelnen Teilsysteme voneinander und Kommunikation dieser Teilsysteme ueber genau definierte, standardisierte und zukunftssichere Schnittstellen - Verwendung von autonomen Komponenten Einsatz von marktueblichen Geoinformationssysteme, - Haltung der Daten in Standarddatenbanken (z.B. Oracle SC), - Entwicklung von Fachschalen. Aufgaben des IfGI - Koordinierung des Projekts: - Beratung des HLVA bei der Konzeption der ATKIS-Produktionsumgebung - Konzeption der Testverfahren fuer die einzusetzende Software, - Durchfuehrung der Tests, Einbringen der aktuellen Entwicklungen aus dem Open GIS Co.

Nickel-spezifische allergische Reaktionen

Kontaktekzeme durch reaktive Chemikalien (Haptene) stellen ein erhebliches umweltbedingtes Gesundheitsrisiko dar. Haptenspezifische T-Lymphozyten besitzen eine Schluesselfunktion bei der Ausloesung solcher Erkrankungen. Das vorliegende Projekt zielt auf die Indentifizierung antigener Determinanten und grundlegender Wirkungsmechanismen bei der Nickelallergie des Menschen. Parallel zu einem Tiermodell soll versucht werden, nickelbindende, HLA-assoziierte Peptide zu definieren, die als antigene Determinanten fuer nickelspezifische humane T-Zellen fungieren. Spezifische T-Zellen lassen sich aus peripherem Blut nickelsensitiver Probanden klonieren und reaktive T-Zellrezeptoren werden ueber Genklonierung und Transfektion in Maus-Hybridomzellen immortalisiert. Relevante Peptide sollen aus HLA-Extrakten und synthetischen 'Peptid-Bibliotheken' isoliert werden. Zum Nachweis dienen HLA-DR transfizierte, Prozessierungsdefekte und humane Zellmutanten.

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