Results 161 to 170 of about 2,677 (220)
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An enzyme immunoassay for the anabolic agent zeranol
Food Additives and Contaminants, 1989A competitive enzyme immunoassay (EIA) for the detection and quantitation of zeranol has been developed. The assay involves the use of excess second antibody adsorbed onto the walls of a microtitration plate well. Enzyme-labelled zeranol, prepared by the N-succinimidyl ester method, and standard or samples are added to the wells followed by zeranol ...
S N Dixon
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Characterization of the estrogenic activities of zearalenone and zeranol in vivo and in vitro
Journal of Steroid Biochemistry and Molecular Biology, 2007In the present study, we compared the estrogenic activity of zearalenone (ZEN) and zeranol (ZOL) by determining their relative receptor binding affinities for human ERalpha and ERbeta and also by determining their uterotropic activity in ovariectomized female mice.
Joong-Youn Shim +2 more
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Journal of Veterinary Pharmacology and Therapeutics, 1983
A radioimmunoassay for zeranol has been validated and used to measure the concentration of zeranol in the urine of sheep and cattle treated with zeranol (Ralgro). The assay uses an antibody raised against zeranol‐16‐carboxy‐propyl ether conjugated to human serum albumin. In sheep and cattle urine the limits of detection were approximately 2 ng/ml and 2.
S N, Dixon, K L, Russell
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A radioimmunoassay for zeranol has been validated and used to measure the concentration of zeranol in the urine of sheep and cattle treated with zeranol (Ralgro). The assay uses an antibody raised against zeranol‐16‐carboxy‐propyl ether conjugated to human serum albumin. In sheep and cattle urine the limits of detection were approximately 2 ng/ml and 2.
S N, Dixon, K L, Russell
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Journal of Veterinary Pharmacology and Therapeutics, 1986
Using a monoclonal antibody raised against zeranol, a radioimmunoassay has been validated for the determination of zeranol residues in the faeces of treated steers. The limit of decision defined as the mean apparent concentration of zeranol in the faeces of untreated cattle + 3 SD was 1 ng/g faeces.
S N, Dixon, C B, Mallinson
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Using a monoclonal antibody raised against zeranol, a radioimmunoassay has been validated for the determination of zeranol residues in the faeces of treated steers. The limit of decision defined as the mean apparent concentration of zeranol in the faeces of untreated cattle + 3 SD was 1 ng/g faeces.
S N, Dixon, C B, Mallinson
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Journal of Veterinary Pharmacology and Therapeutics, 1986
Rapid solvent extraction combined with a radioimmunoassay using a nionoclonal antibody raised against a derivative of zeranol has been used to measure the residues of the anabolic agent zeranol in the edible tissues (muscle, liver, kidney and fat) of cattle treated with Ralgro.Calibration curves, both with and without, tissue extracts exhibit good ...
S N, Dixon, K L, Russell
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Rapid solvent extraction combined with a radioimmunoassay using a nionoclonal antibody raised against a derivative of zeranol has been used to measure the residues of the anabolic agent zeranol in the edible tissues (muscle, liver, kidney and fat) of cattle treated with Ralgro.Calibration curves, both with and without, tissue extracts exhibit good ...
S N, Dixon, K L, Russell
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New Zealand Veterinary Journal, 1983
Abstract Extract Sir:- It is well documented in the literature that bulls grow 10–20% faster and have a higher efficiency of feed conversion than steers.(3)(4)(5) New Zealand's beef production could well be increased markedly if more dairy and traditional beef calves are fattened as bulls. The secondary sex characteristics (behaviour problems) of bulls
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Abstract Extract Sir:- It is well documented in the literature that bulls grow 10–20% faster and have a higher efficiency of feed conversion than steers.(3)(4)(5) New Zealand's beef production could well be increased markedly if more dairy and traditional beef calves are fattened as bulls. The secondary sex characteristics (behaviour problems) of bulls
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A chemiluminescent immunoassay for zeranol and its metabolites
Journal of Veterinary Pharmacology and Therapeutics, 1986A sensitive immunoassay is presented for the detection of the xenobiotic oestrogenic growth promotor zeranol (Ralgro®) and the mycotoxin zearalanone. The detection is based on cheniiluminescence using a zeranol–isoluminol conjugate. A lowest detectable amount of 2–5 pg zeranol per tube was achieved.
Jansen, EHJMrivm +4 more
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New Zealand Veterinary Journal, 1986
Abstract Extract Madam:- The growth rate response obtained in yearling steer cattle to zeranol treatment have been extensively documented in New Zealand (1) (2) (4) and overseas literature. I wish to record the result of growth responses in two-year-old steer cattle.
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Abstract Extract Madam:- The growth rate response obtained in yearling steer cattle to zeranol treatment have been extensively documented in New Zealand (1) (2) (4) and overseas literature. I wish to record the result of growth responses in two-year-old steer cattle.
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Stability of zeranol, nandrolone and trenbolone in bovine urine
The Analyst, 1994The stability of some growth promoting agents in cattle urine, under various temperature storing conditions, was investigated. Bovine urine samples obtained from previous excretion studies which contained zeranol, nandrolone and trenbolone respectively, were stored frozen, at room temperature and in direct sunlight.
P J, van der Merwe, J W, Pieterse
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Effect of Zeranol on Sexual Development of Crossbred Bulls
Journal of Animal Science, 1989Three groups of 1/2 Simmental X 1/4 Brahman X 1/4 Hereford bull calves were used during two different years to study effects of zeranol on sexual development. At 154 d of age, half the calves were implanted with 36 mg zeranol and half, not implanted, served as controls.
R W, Godfrey +2 more
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