Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 261 for “"Caffeine"”.
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Effects of Caffeine on Muscular Strength
Caffeine is the most widely consumed drug in the world. Research has suggested that caffeine can enhance aerobic performance. However, its benefits in the resistance training world are not fully understood. Due to caffeine's ability to alter pain perception and the onset of peripheral fatigue it …
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Caffeine and Human Perception of Time
… of this study was to investigate the effect of caffeine on several components of time perception in an attention-demanding task. Review of the current literature shows that the rhythm of the brain's internal clock, controlled by the suprachiasmatic nucleus (SCN), which is believed to mediate the …
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The effects of caffeine and caffeine withdrawal on measures of mood, cognition, and functional magnetic resonance imaging
Caffeine is a widely used neurostimulant that exerts its effects by antagonizing adenosine receptors in a competitive fashion. Caffeine has been considered to have net benefits on mood, reaction time, and cognitive performance. However, chronic caffeine use can result in tolerance to some of its …
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A Characterization of Caffeine Imprinted Polypyrrole Electrode
… (Ppy) has numerous applications. In this study, caffeine imprinted electrodes (CIE) were prepared and characterized. This research project mainly focused on three important aspects: &#;To determine the thickness of the polymeric film. &#;To determine the Limit of detection (LOD) of the polymeric …
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Caffeine Use Within the Safety Sensitive Industry
<p>This study is an in-depth look at caffeine use and its effect on individuals who work within a safety and security sensitive job industry. The focus of this paper is on the current use of caffeine in our society as well as the overuse/abuse of the drug and the causes behind it. This paper will …
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Effect of rutaecarpine on caffeine pharmacokinetics in rats
… coffee or tea, but are sensitive to effects of caffeine. Therefore, they either avoid drinking caffeinated beverages altogether, or they avoid drinking them close to bedtime to prevent caffeine from interfering with their sleep. Ruta Cleanse and Ruta Sleep are natural supplements containing …
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Caffeine and Nicotine : A Review of Their Combined Use, Interactive Effects and the Impact of Caffeine Abstinence on Tobacco Cessation and Withdrawal
… studies suggest that the phannacologic effect of caffeine in coffee may be partially but not totally responsible for the relationship. The behavioral relationship appears to be supported by conditioning, a reciprocal interaction (caffeine intake increases anxiety/arousal - nicotine decreases it), …
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The Effect of Caffeine and Ethanol on Flatworm Regeneration.
… factors can influence planarian regeneration. Caffeine and ethanol are two widely used drugs and their effect on flatworm regeneration was evaluated in this experiment. Non-toxic levels of caffeine, a stimulant, and ethanol, a depressant, were determined. The tails of the flatworms were removed …
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Controlling for Acute Caffeine Intake in Cardiovascular Reactivity Research
Caffeine substantially affects cardiovascular functioning, yet wide variability exists in caffeine control procedures in cardiovascular reactivity (CVR) research. This study was conducted in order to identify a minimal abstention duration in habitual coffee consumers whereby CVR is unconfounded by …
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Lifetime Caffeine Intake and the Risk of Epithelial Ovarian Cancer
… To examine the association between lifetime caffeine intake and the risk of epithelial ovarian cancer (EOC) overall, according to tumour behaviour (invasive vs. borderline), and by invasive tumour type (Type I vs. Type II) and to assess menopausal status as an effect modifier. Methods: The …
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Psychological and situational predictors of caffeine consumption in daily life
The stimulant effects of caffeine have been widely studied. Research on caffeine has proceeded, similar to research on other drugs, with a focus on establishing the presence and magnitude of effects on physiological, psychological and behavioral processes through placebo-control studies conducted …
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The Effects of Caffeine and Expectancy on Short Term Memory
<p>Although caffeine is the most widely used drug in the world, research on the effects of caffeine on mental performance tasks (especially short term memory tasks) is inconclusive. One possible explanation for this limited understanding is the lack of studies accounting for participant expectancy …
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Extraction of caffeine from spent coffee grounds using ionic liquids
Submitted in fulfillment of the requirements for the degree of Master of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2022.
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Effects of Pre-Workout Caffeine Supplementation on Post-Exercise Hypotension
… attenuate or completely eliminate that response. Caffeine, a popular stimulant, is often consumed prior to exercise. Therefore, the purpose of this study was to investigate the effects of pre-workout caffeine supplementation on the post-exercise hypotensive response in adults with above normal …
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Arousal theory and the interrelationships of caffeine, nicotine and impulsivity
Nicotine, caffeine, impulsivity, and arousal are all intercorrelated: both drugs increase arousal, and impulsivity is theoretically related to arousal. However, the independent and joint effects of nicotine and caffeine on impulsive behavior are unclear. In this study, male college students (N = …
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