NANDROLONE AND ESTRADIOL BIOMARKERS IDENTIFICATION IN BOVINE URINE APPLYING A LC‐HRMS METABOLOMICS APPROACH

2021 ◽  
Author(s):  
Saadia Ouzia ◽  
Anne‐Lise Royer ◽  
Marzia Pezzolato ◽  
Alessandro Benedetto ◽  
Elena Biasibetti ◽  
...  
Keyword(s):  
Bovine Urine

scholarly journals GC-MS/MS versus LC-MS/MS for unambiguous identification of a and ß-trenbolone in bovine urine

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Amanda Lemes Silveira ◽  
Adriana Ferreira Faria
Keyword(s):  
Bovine Urine

Excretion profile of corticosteroids in bovine urine compared with tissue residues after therapeutic and growth-promoting administration of dexamethasone

Steroids ◽  
2013 ◽  
Vol 78 (9) ◽  
pp. 803-812 ◽  
Author(s):  
Carolina Ferranti ◽  
Marco Famele ◽  
Luca Palleschi ◽  
Elena Bozzetta ◽  
Marzia Pezzolato ◽  
...  
Keyword(s):  
Bovine Urine ◽  
Growth Promoting

Quantification and Stereochemical Composition of R-(−) and S-(+)-Clenbuterol Enantiomers in Bovine Urine by Liquid Chromatography–Tandem Mass Spectrometry

2019 ◽  
Vol 44 (3) ◽  
pp. 237-244
Author(s):  
Benjamín Velasco-Bejarano ◽  
Jahir Bautista ◽  
Martha E Rodríguez ◽  
Raquel López-Arellano ◽  
Roberto Arreguín-Espinosa ◽  
...  
Keyword(s):  
Extraction Efficiency ◽  
Limit Of Detection ◽  
Internal Standard ◽  
High Specificity ◽  
Wilcoxon Test ◽  
Adrenergic Agonist ◽  
Limit Of Quantification ◽  
Bovine Urine ◽  
Enantiomeric Analysis ◽  
Liquid Chromatography Tandem Mass

Abstract Clenbuterol (4-amino-α-[(tert-butylamino)methyl]-3,5-dichlorobenzylalcohol) is a β2-adrenergic agonist. The consumption of meat contaminated with clenbuterol can lead to increased heart rate, blood pressure, anxiety, palpitations and skeletal muscle tremors. Several analytical methods have been developed to identify and quantify clenbuterol in different biological matrices. In this report, we have developed a specific and sensitive analytical method for quantifying clenbuterol and performed an in-depth enantiomeric analysis in bovine urine. The method was evaluated in accordance with international guidelines, and we used an isotopically labeled analog as an internal standard. The extraction efficiency for clenbuterol in bovine urine was > 98%, the limit of detection was 0.05 ng/mL and the limit of quantification was 0.10 ng/mL. Our assay showed high specificity, no carryover was observed and the assay was linear in the range 0.10–8.0 ng/mL. Fifteen bovine urine samples were analyzed (containing clenbuterol), and an enantiomeric analysis was performed. The clenbuterol concentration range was 0.10–10.56 ng/mL across these samples. The levorotatory enantiomer was detected at greater concentrations than the dextrorotatory enantiomer, the ratio being 1.7 ± 0.6 (n = 15), and a statistical difference was observed (P < 0.05) using the Wilcoxon test.

scholarly journals Optimised deconjugation of androgenic steroid conjugates in bovine urine

2017 ◽  
Vol 34 (4) ◽  
pp. 482-488 ◽  
Author(s):  
Mikael Pedersen ◽  
Henrik L. Frandsen ◽  
Jens H. Andersen
Keyword(s):  
Bovine Urine ◽  
Androgenic Steroid ◽  
Steroid Conjugates

Effect of the nitrification inhibitor dicyandiamide (DCD) on microbial communities in a pasture soil amended with bovine urine

2010 ◽  
Vol 42 (9) ◽  
pp. 1425-1436 ◽  
Author(s):  
Maureen O’Callaghan ◽  
Emily M. Gerard ◽  
Philip E. Carter ◽  
Richard Lardner ◽  
Upali Sarathchandra ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Nitrification Inhibitor ◽  
Bovine Urine ◽  
Pasture Soil

Impact of bovine urine deposition on soil microbial activity, biomass, and community structure

2010 ◽  
Vol 44 (1) ◽  
pp. 89-100 ◽  
Author(s):  
K.H. Orwin ◽  
J.E. Bertram ◽  
T.J. Clough ◽  
L.M. Condron ◽  
R.R. Sherlock ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Activity ◽  
Soil Microbial Activity ◽  
Bovine Urine ◽  
Soil Microbial
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