Results 121 to 130 of about 529 (159)
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Ergovaline binding and activation of D2 dopamine receptors in GH4ZR7 cells
Journal of Animal Science, 1995Ergovaline inhibition of radioligand binding to the D2 dopamine receptor and ergot alkaloid inhibition of vasoactive intestinal peptide (VIP)-stimulated cyclic AMP production in GH4ZR7 cells, stably transfected with a rat D2 dopamine receptor, were evaluated. Ergovaline inhibition of the binding of the D2-specific radioligand, [3H]YM-09151-2, exhibited
B T, Larson +6 more
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Ergovaline levels in tall fescue and its effect on performance of lactating cows
Animal Feed Science and Technology, 2007Abstract To investigate the effects of ergovaline on milk production of lactating dairy cows, a survey and feeding trial were conducted. In the survey, 25 samples of imported tall fescue (Festuca arundinacea) hay were collected and analyzed for ergovaline.
K K Park
exaly +2 more sources
Evidence that ergovaline acts on serotonin receptors
Life Sciences, 1993Ergovaline is a potent vasoconstrictor of isolated bovine uterine and umbilical arteries. Contractions to ergovaline were slow to develop and required 120 min or more to reach their maximum effect. Tissues contracted to ergovaline did not relax over a 3 hr period despite repeated changing of the bath fluid with fresh Krebs solution.
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American Journal of Veterinary Research, 2002
Abstract Objective—To compare the effects of the ergot alkaloid ergovaline with effects of ergotamine on blood pressure, heart rate, respiratory rate, and body temperature in conscious sheep. Animals—3 sheep with indwelling arterial catheters.
Lance M, McLeay +2 more
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Abstract Objective—To compare the effects of the ergot alkaloid ergovaline with effects of ergotamine on blood pressure, heart rate, respiratory rate, and body temperature in conscious sheep. Animals—3 sheep with indwelling arterial catheters.
Lance M, McLeay +2 more
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Biomedical Applications, 1999
A high-performance liquid chromatographic method for the determination of the mycotoxin ergovaline in goat's milk is described here. Ergotamine was used as an internal standard. For a sample size of 5.0 ml, the cleanup method included precipitation of milk protein with acetone.
Patrice Garcia, Y Bonnaire
exaly +4 more sources
A high-performance liquid chromatographic method for the determination of the mycotoxin ergovaline in goat's milk is described here. Ergotamine was used as an internal standard. For a sample size of 5.0 ml, the cleanup method included precipitation of milk protein with acetone.
Patrice Garcia, Y Bonnaire
exaly +4 more sources
Ergovaline Distribution in Perennial Ryegrass Naturally Infected with Endophyte
1997Recently there has been renewed interest in the possible impact on animal health and performance and insect resistance of ergovaline in perennial ryegrass (Lolium perenne) naturally infected with Neotyphodium lolii. In an earlier limited study of vegetative plants, ergovaline was found to be concentrated in basal tissues (Davies et al., 1993).
G. A. Lane +3 more
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Ergovaline Concentration of Tall Fescue as Affected by Limestone Application
Crop, Forage & Turfgrass Management, 2018Core Ideas Limestone application reduced ergovaline concentrations by 20 ppb compared with non‐treated control plots. This slight reduction in ergovaline concentrations is not enough to affect toxicosis, but the reduction occurred with a corresponding increase in soil pH, which can improve the growing conditions for pasture legumes and indirectly ...
Sarah L. Kenyon +5 more
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Effect of Feeding Ergovaline and Ergine on Growing Rats
1997The ergot alkaloids and specifically the ergopeptide, ergovaline have been implicated as alkaloids which are responsible for producing fescue toxicosis. Because of the lack of availability of the suspect alkaloids, studies using fescue alkaloids have been limited to in vitro or in vivo studies in which small quantities of the drug is injected or ...
E. L. Piper +4 more
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Quantification of Ergovaline in Tall Fescue by Near Infrared Reflectance Spectroscopy
Crop Science, 1997Near infrared (NIR) reflectance spectroscopy was examined as a possible alternative to high performance liquid chromatography (HPLC) analysis for ergovaline in tall fescue (Festuca arundinacea Schreber). Tall fescue samples were collected from field plots in Missouri and analyzed by NIR spectroscopy and HPLC.
C. A. Roberts +2 more
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Journal of Agricultural and Food Chemistry, 1991
(.)The detection limit of ergovaline in fescue seed and vegetative tissue was 50 μg/kg. Replicate samples, collected each week during two growing seasons from experimental plots of KY-31 tall fescue (85-100% endophyte-infested), were separated into stems with leaf sheaths, leaf blades and developing seed heads.
George E. Rottinghaus +3 more
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(.)The detection limit of ergovaline in fescue seed and vegetative tissue was 50 μg/kg. Replicate samples, collected each week during two growing seasons from experimental plots of KY-31 tall fescue (85-100% endophyte-infested), were separated into stems with leaf sheaths, leaf blades and developing seed heads.
George E. Rottinghaus +3 more
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