Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"xiphophorus"”.
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Study of the CDKN2D (P19) locus in Xiphophorus
No abstract prepared.
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Untersuchungen zur genetischen Kontrolle des Melanom-induzierenden Gens von Xiphophorus
… bei Rückkreuzungshybriden des Zahnkarpfens Xiphophorus wird durch die Überexpression des geschlechtschromosomalen Xmrk Onkogens verursacht. Im Wildtyp ist die Aktivität von Xmrk durch einen autosomalen Regulatorlocus R unterdrückt. Ziel dieser Arbeit war es, Erkenntnisse über die …
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Isolation and Characterization of the Xiphophorus Maculatus Uracil-DNA Glycosylase Gene
No abstract prepared.
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Melanomspezifische Genexpression und Signaltransduktion bei Xiphophorus: Die Rolle des Transkriptionsfaktors Mitf
… dieser Arbeit näher untersucht worden. Das Xiphophorus Melanomsystem, ein genetisch gut charakterisiertes Modell, wurde herangezogen, um unter zu Hilfenahme des Tyrosinasegens des mit Xiphophorus nahe verwandten Medaka (Oryzias latipes) die Transkriptionsregulation im Melanom näher zu …
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Hypoxic Stress Induced Gene Modulation in Medaka (Oryzias latipes) and Xiphophorus maculatus
… liver, gill, and fin) of Oryzias latipes and Xiphophorus maculatus. We analyzed six potential gene targets that had previously been shown in microarray studies to exhibit robust (> 5.0 fold) changes in mRNA abundance when medaka were exposed hypoxic conditions. Herein we present results of the …
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The Effects of Chronic Nitrite Exposure on Tissue Morphology and Physiology in Xiphophorus couchianus
… Therefore, we used the live-bearing fish species Xiphophorus couchianus as a model organism to better understand the effects of chronic nitrite exposure on tissue physiology, morphology and oxidative stress in live-bearing female fish. We hypothesized that chronic nitrite exposure would lead to …
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Molecular analysis of the sex-determining region of the Y chromosome in the platyfish Xiphophorus maculatus
… need to be examined including the platyfish Xiphophorus maculatus. Xiphophorus maculatus has three types of sex chromosomes (X, Y and W; females are XX, WX or WY; males are XY or YY). Its gonosomes are at an early stage of differentiation. The sex-determining locus on the sex chromosomes is …
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Identifizierung und molekulare Analyse Xmrk-gekoppelter Gene in der geschlechtsbestimmenden Region des Genoms von Xiphophorus maculatus
Fische der Gattung Xiphophorus stellen eines der am besten untersuchten Modellsysteme zur Untersuchung genetischer Geschlechtsbestimmung innerhalb dieser Klasse von mehr als 24.000 Arten dar. X. maculatus kann männliche (XX/ XY) oder weibliche (WY/ YY) Heterogametie aufweisen. Zusätzlich sind …
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Characterization of O6-Methylguanine DNA Methyltransferase and Base Excision DNA Repair Activity in Xiphophorous Fishes
… guanine DNA methyltransferase (06-MGMT). Xiphophorus fish provide an excellent system to study the heritable factors of tumorigenesis and carcinogenesis since inter-species cross are fertile and several select inter-species crosses produce progeny which show enhanced susceptibility to MNU …
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Standardizing and Optimizing Rearing Methods of Animal Models: Influence of Diet on Growth and Reproduction in Xiphophorus Maculatus and Oryzias latipes
… To achieve this, two biomedical fish models, Xiphophorus maculatus (platy fish) and Oryzias latipes (medaka), were used to evaluate dietary effects on growth and reproductive performance. Platy fish (n =120) and medaka (n =300) were reared from birth to one month of life on Ziegler Aquatox …
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Filogenia e classificação dos peixes poecilióideos (Cyprinodontiformes: Cyprinodontoidei)
… ctenolepis) (Phallichthys fairweatheri (Xiphophorus helleri (Poecilia heterandria ((Limia pauciradiata (Poecilia vivipara (Poecilia sphenops + Poecilia velifera))) ((Micropoecilia parae + Lebistes reticulatus) (Pamphorichthys hollandi (Poeciliopsis prolifica (Phallotorynus jucundus …
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Untersuchungen zur Apoptoseregulation durch die Melanom induzierende Rezeptortyrosinkinase Xmrk
… Rezeptortyrosinkinase Xmrk im Zahnkarpfen Xiphophorus führt zur Ausbildung maligner Melanome. Expressionsstudien in transgenen Medaka-Fischen haben gezeigt, daß Xmrk allerdings nur in bestimmten Geweben wie Hirn, Epithelien, Auge und Pigmentzellen zur Tumorbildung führt. Zellen, die durch …
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Biochemical Analysis of Evolutionary Divergent Vertebrate Larp6 Proteins
… from zebrafish (Danio rerio), platyfish (Xiphophorus maculatus) and human to carry out detailed biochemical analyses of vertebrate LARP6 RNA binding activity. The purpose is to determine if there is a species-specific protein-RNA interaction due to co- evolution of the ligand-binding …
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Social context shapes individual variation in behavior, learning, and neural gene expression in a swordtail fish
… context in male and female El Abra swordtails (Xiphophorus nigrensis), a species with three genetically-influenced male mating strategies (courtship display, coercion, and mixed strategy). In males, we found that coercive males are bolder but have decreased spatial cognition abilities compared …
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Survival and growth of fish in water reclaimed from cattle feedlots
… sailfin molly Poecilia latipinna), and platies (Xiphophorus maculatas) were evaluated in 2-week trials (10 fish/ trial). It was concluded that it is feasible for all of the species tested to be utilized in an integrated waste management system. Koi, platy, bluegill, molly, fathead minnow, redfin …
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Identification of Host Fish and Experimental Culture of Juveniles for Selected Freshwater Mussel Species in Virginia
… cichlid (Cichlasoma nigrofasciatum), platy (Xiphophorus maculatus), green sunfish (Lepomis cyanellus), rock bass (Ambloplites rupestris), redbreast sunfish (Lepomis auritus), and white perch (Morone americana) were identified as suitable hosts for L. recta. The banded sculpin (Cottus …
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Die chemische Ökologie von Kurzflügelkäfern der Gattungen Dianous und Stenus (Coleoptera, Staphylinidae)
… gegen die Ameise Lasius flavus und den Fisch Xiphophorus helleri. Weiterhin war bei den meisten Verbindungen eine deutliche wachstumshemmende Wirkung gegen Bakterien und Pilze feststellbar. Sowohl bezüglich der fraßhemmenden als auch der antimikrobiellen Wirkung zeigten sich hierbei die …