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Showing 1 to 12 of 12 for “"VTG"”.
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Aufladung von Pkw DI - Ottomotoren mit Abgasturboladern mit variabler Turbinengeometrie
… sich für den Pkw-Dieselmotor die Aufladung mit VTG durchgesetzt. Beim Ottomotor wurde bislang der Schritt vom einfacheren Wastegate-Lader zur VTG noch nicht unternommen. Die Gründe dafür sind insbesondere in der höheren thermischen Belastung, aufgrund der höheren Abgastemperatur, und der …
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Chronic effects of single intra-peritoneal injection of endosulfan on rainbow trout (Oncorhynchus mykiss) and field observations of caged rainbow in Oshawa Creek
… (ppm) of endosulfan. Plasma vitellogenin (VTG) levels, liver ethoxyresorufin-O-deethylase (EROD), citrate synthase (CS), lactate dehydrogenase (LDH), and brain acetylcholine esterase (AChE) (caged fish only) enzymatic activities were measured. Trout injected with endosulfan experienced an …
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Effects of ibuprofen on Rainbow Trout (Oncorhynchus mykiss) following acute and chronic waterborne exposures
… Cyclooxygenase (COX) activity, vitellogenin (VTG) concentration and ethoxyresorufin-O-deethylase (EROD) activity were evaluated following waterborne ibuprofen exposure of trout to 1 and 10 mg/L in the acute exposure and 1, 32 and 1000 μg/L in the chronic exposure, along with an experimental …
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Patterns of intersex prevalence, vitellogenin, and reproductive condition in two commercially harvested fish along a pollution gradient in the Illinois River complex
… levels of the blood lipoprotein vitellogenin (VTG), and decreased reproduction. However, assessments of the prevalence and distribution of VTG and intersex in wild fish populations are necessary and few have been performed on the Illinois River. Such field studies may provide insight into both …
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Temporal Expression and Transcriptional Regulation of the Vitellogenin Receptor Gene In Largemouth Bass (Micropterus Salmoides)
<p>Fish vitellogenin (VTG) synthesized and released from the liver of oviparous animals is taken up into oocytes, in part, by the vitellogenin receptor (VtgR). Some studies have focused on the functional role of VtgR in fish; however the transcriptional control of this gene has not been …
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Vitellogenin induction in male Japanese medaka exposed to the chemotherapeutics: oxytetracycline, Romet-30, and copper sulfate
The specificity of a medaka vitellogenin (Vtg) enzyme-linked immunosorbent assay (ELISA) kit was tested on adult hybrid tilapia to determine if vitellogenin could be successfully measured in tilapia using this method. Adult hybrid (Orechromis niloticus x Oreochromis mossambicus x Oreochromis …
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Ecotoxicological Investigations in Effluent-Dominated Stream Mesocosms
… identified to seasonally induce vitellogenin (VTG) in male fathead minnows. Steroids, nonylphenol ethoxylate metabolites, and other unidentified compounds were identified as causative effluent estrogens. These findings suggest that in vivo VTG bioassays should be used to confirm in vitro Yeast …
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Benzo[a]pyrene effects on Fundulus heteroclitus reproductive endpoints
… liver somatic index (LSI), liver vitellogenin (vtg) mRNA expression and sperm concentrations were not significantly affected. In females, estradiol concentrations were also significantly reduced after BaP exposure, but egg production, GSI, LSI, vtg expression and oocyte maturation were not …
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Natural Reproductive Cycle of Northern Largemouth Bass in the Upper Midwest, with Applications to Off-season Spawning
… and estradiol—17β (E2)] and vitellogenin (Vtg), in addition to gamete development and organosomatic indices, were related to temporal water temperature and photoperiod patterns. Statistical analysis (" = 0.05) of reproductive parameters across months was conducted with Proc Mixed (SAS, …
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In vitro model of the fathead minnow hypothalamic-pituitary-gonadal axis for toxicological evaluation
… the sex steroid that stimulates vitellogenin (Vtg) production in egg producing animals. Testes and ovaries were dosed with 5 IU pregnant mare serum gonadotropin (PMSG), which contains gonadotropins that stimulate production of sex steroids. It was hypothesized that E2 would stimulate Vtg …
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The anti-estrogenic and liver metabolic effects of DHAA in rainbow trout (oncorhynchus mykiss)
… hepatosomatic index (HSI), vitellogenin (VTG) and plasma sorbitol dehydrogenase (SDH). This effect was reduced by mixing E2 with DHAA, indicating that DHAA does not cause its anti-estrogenic effects indirectly due to liver damage. Exposure to 5 ppm of DHAA caused a significant increase in …
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Gonadal intersex in teleosts: Mechanisms, molecular biomarkers and diagnostic assays
… higher levels of vitellogenin (<em> vtg</em>) transcripts were found in livers of males with TOs, but only when sampled in the spawning season. Further, we quantified contaminant levels in surface water to identify possible correlations between contamination levels and the observed …