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The primary aim of the study was to determine the efficacy of acute caffeine intake to enhance intense resistance training performance. Fourteen resistance-trained men (age and body mass = 23.1 ± 1.1 years and 83.4 ± 13.2 kg, respectively) who regularly consumed caffeine ingested caffeine (6 mg · kg(-1)) or placebo 1 hour before completion of 4 sets of(More)
A rapid colorimetric test for the detection of gamma-hydroxybutyric acid (GHB) is described. The ferric hydroxamate test for ester detection has been adapted to detect GHB in human urine samples from a healthy female and a healthy male subject. The assay can be performed within 5 min and with a GHB detection limit of 0.5 mg/ml when 0.3 ml of human urine is(More)
A sensitive and specific high-performance liquid chromatography (HPLC) method based upon laser-based polarimetric detection is developed for the determination of six tetracycline analogues. By interfacing the laser-based polarimeter online with an HPLC system, the specific rotation of each analogue is obtained as compounds elute from the separation system.(More)
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