Ricardo García Cavazos

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The learning benefits of contextual interference have been frequently demonstrated in different settings using novice learners. The purpose of the present study was to test such effects with skilled athletic performers. Scheduling differences for biweekly additional ("extra") batting-practice sessions of a collegiate baseball team were examined. 30 players(More)
The precise etiology of neural tube defects (NTDs) is not known. There is some evidence that mutations in MTHFR gene provide susceptibility to NTDs in some populations; however, other studies have not found this association. One of the problems with previous studies is that they treat NTDs as a homogeneous group, when specific defects could have different(More)
The interaction of 2[14C]methyl-2,3[14C]acrylonitrile (MeAN) with the components of blood and its disposition in male Sprague-Dawley rats has been investigated. Following an oral administration of 100 mg/kg (0.5 LD50, 8 microCi/kg), the rats excreted 43% of the [14C] in the urine, 15% in the feces and 2.5% in the expired air as 14CO2 in 5 days. Hydrogen(More)
In liver fractions from male Sprague-Dawley rats, the metabolism of methacrylonitrile (MeAN) to cyanide (CN-) was localized in microsomal fraction and required reduced nicotinamide adenine dinucleotide phosphate (NADPH) and oxygen for maximal activity. The biotransformation of MeAN to CN- was characterized with respect to time, microsomal protein(More)
The interaction of methacrylonitrile (MeAN) with glutathione (GSH) was evaluated in aqueous solution and its in vivo potential to deplete GSH in male Sprague Dawley rats at the 0.5 LD50 dose of 100 mg MeAN/Kg body weight was investigated. Addition of MeAN (0-40 mM) to a solution of 0.3 mM GSH in 2 mM EDTA, pH 7.4, resulted in a time and concentration(More)
Behavioral assumptions are often the central building blocks of many economic theories, such as the assumption of profit or utility maximization. This paper proposes a procedure to test for behavioral assumptions. The test relies on the following principle: Behavior manifests itself in the form of " shape conditions. " For example, if a firm minimizes(More)
Two common problems in econometric models of production are aggregation and unobservable variables. Many production processes are subject to production shocks, hence both expected and realized output is unknown when inputs are committed. Expectations processes are notoriously difficult to model, especially when working with aggregated data or risk-averse(More)
The toxicity, uptake, tissue distribution, elimination, and covalent binding of 2-[14C]methyl-[2.3-14C]acrylonitrile (MeAN) in male Sprague-Dawley rats were investigated. Following an oral administration of 100 mg/Kg body weight (0.5 LD50, 8 microCi/Kg bw) the rats exhibited several signs of toxicity including ataxia, convulsions, mild diarrhea, salivation,(More)
Reye's syndrome is considered a disease of the pediatric age. It is characterized by a prodrome of viral illness followed by vomiting and encephalopathy with associated hepatic dysfunction. This syndrome is potentially life-threatening with high morbidity and mortality rates. There are 27 other cases of adult onset Reye's syndrome reported in the(More)
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