Results 171 to 180 of about 2,614 (204)
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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 ...
P J, Patel, S N, Dixon
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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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Zeranol—A ‘nature-identical’ oestrogen?
Food and Chemical Toxicology, 1985The use of implants of zeranol (alpha-zearalanol), a widely-used anabolic growth promoter, in food animals results in very low residues of this compound in the edible tissues. In comparison, residues of myco-oestrogens--specifically the beta-resorcylic acid lactones (RALs) such as zearalenone and its metabolites--commonly found as contaminants of ...
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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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Response of Nigerian zebu cattle to Zeranol implants
Tropical Animal Health and Production, 1980The effect of Zeranol, an anabolic agent, on the weight gains of Nigerian zebu fattening bulls was investigated over a period of 16 weeks. Implanted Sokoto Gudali and White Fulani bulls showed average daily weight gains of 0.5 and 0.49 kg respectively as compared to 0.47 and 0.41 kg by non-implanted counterparts.
T U, Obi, M A, Daniyan, L O, Ngere
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Effect of zeranol on bull muscle fibre composition
Meat Science, 1986Two trials are reported in which bulls were implanted with zeranol and slaughtered at 18 months. There was no significant change in carcass weight due to zeranol in either trial. Samples of the longissimus dorsi (LD) and splenius (Sp) were cross-cryosectioned, stained for myofibrillar ATPase and examined by conventional light microscopy.
O A, Young, D M, Foote, J J, Bass
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Sexual Development in Beef Bulls Following Zeranol Implants
Journal of Animal Science, 1985Two trials were conducted to study the effect of zeranol implants on growth and sexual development of bull calves. Trial 1 compared the effects of implanting with 72 mg of zeranol at 48 d of age (branding), at 215 d of age, or at both times with nonimplanted control bulls.
R B, Staigmiller +3 more
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Environmental Sampling and Analysis for Zeranol
American Industrial Hygiene Association Journal, 1987Due to concern over health effects associated with the use of zeranol, a sampling and analytical method to monitor zeranol in the work environment was developed. The collection strategy included air samples on FHLP filters, area samples on gauze pads, hand/dermal samples on gauze pads and bulk samples.
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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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Zeranol: doping offence or mycotoxin? A case‐related study
Drug Testing and Analysis, 2011Zeranol ((7R,11S)‐7,15,17‐trihydroxy‐11‐methyl‐12‐oxabicyclo[12.4.0]octadeca‐1(14),15,17‐trien‐13‐one, also referred to as 7α‐zearalanol, Ralone®, Frideron®, Ralgro®, etc.) is a semi‐synthetic estrogenic veterinary drug with growth‐promoting properties.
Mario, Thevis +2 more
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