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|Title:||Just how bad is it? Comparison of the mental health of Mexican traumatic brain injury caregivers to age-matched healthy controls|
|Abstract:||Esterification is the first step in the biodiesel production process from low cost feedstock, which is typically characterized by its high content (>5%) of free fatty acids (FFAs). Although multiple attempts have been made to describe the kinetics of the esterification process for this feedstock, there is no consensus regarding which model is the most suitable. In this paper, two models were evaluated as candidates to describe the esterification of grease trap wastes, a synthetic mixture of tallow fat and canola oil, and oleic acid, which all have a high degree of acidity. The first model considers a pseudo-first order reaction, whereas the second model considers the reversibility of the reaction. All parameters involved in these models are structurally identifiable and are estimated with the Levenberg-Marquardt method. A statistical analysis based on Akaike's weights show that the reversible model provides the best fit for all experimental runs compared to the first order model. This result was obtained from variations in catalyst loading and moisture content. Practical applications: The design and implementation of monitoring algorithms or robust control laws for a process carried out in a continuous stirred tank reactor (CSTR) require the knowledge of its dynamical mathematical model that contains a kinetic term. In the particular case of the esterification reactions for feedstock with high content of FFAs developed in the presence of homogeneous acid catalyst, there exists a discrepancy on the mathematical structure of such kinetic term. In this study we perform some batch experiments, considering industrial reagent grade alcohols, to deduce which model (among the two simplest kinetic models) better describes the esterification of oleic acid, grease trap wastes and a mixture of tallow fat and canola oil. Then, the results obtained from this basic research could be applied if monitoring-regulation tasks are required for the esterification of the feedstock considered herein when such esterification be carried out in a CSTR under industrial conditions. " 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",,,,,,"10.1002/ejlt.201400059",,,"http://hdl.handle.net/20.500.12104/42435","http://www.scopus.com/inward/record.url?eid=2-s2.0-84927695916&partnerID=40&md5=dbbf986d6285e25a82752423f1c7cf33",,,,,,"11",,"European Journal of Lipid Science and Technology",,"1598|
WOS",,,,,,"Biodiesel; Esterification; Grease trap wastes; Kinetics; Structural identifiability",,,,,,"Kinetic analysis for the esterification of high free fatty acid feedstocks with a structural identifiability approach",,"Article" "44211","123456789/35008",,"Perrin, P.B., Department of Psychology, Virginia Commonwealth University, Richmond, VA, United States; Stevens, L.F., Hunter Holmes McGuire Veterans Affairs Medical Center, Richmond, VA, United States; Villaseñor Cabrera, T., Department of Neurosciences, Guadalajara University, Guadalajara, Mexico; Jimenez-Maldonado, M., Department of Neurosciences, Guadalajara University, Guadalajara, Mexico, Hospital Civil Fray Antonio Alcalde, Guadalajara, Mexico; Martinez-Cortes, M.L., Department of Neurosciences, Guadalajara University, Guadalajara, Mexico; Arango-Lasprilla, J.C., IKERBASQUE, Department of Psychology, University of Deusto, Bilbao, Spain",,"Perrin, P.B.
Villasenor Cabrera, T.
Arango-Lasprilla, J.C.",,"2013",,"OBJECTIVE: To compare the mental health of family caregivers of individuals with Traumatic brain injury (TBI) to an age-matched healthy control from Guadalajara, Mexico. SETTING: Hospital Civil Fray Antonio Alcade, a public medical facility in Guadalajara, Mexico. PARTICIPANTS: Ninety family caregivers of individuals with TBI and 89 healthy controls (n = 179) did not differ with respect to age, sex, marital status, education, or household income. MAIN OUTCOME MEASURES: Outcome measures assessed satisfaction with life (Satisfaction with Life Scale), depression (Patient Health Questionnaire-9), social support (Interpersonal Support Evaluation List), self-esteem (Rosenberg Self-Esteem Scale), and anxiety (State-Trait Anxiety Inventory). RESULTS: A multivariate analysis of variance found that in comparison to controls, TBI caregivers reported substantially lower mental health scores across all indices, as well as lower social support in two out of three comparisons. The effect sizes of the social support differences were small; two out of five mental health differences reached medium-sized effects; and the other three reached large-sized effects. CONCLUSIONS: Because TBI caregivers' mental health influences the quality of informal care they can provide, mental health interventions for family caregivers are an extremely important part of TBI rehabilitation in Latin America, especially considering familism as a core value in Latino culture. " 2013 - IOS Press and the authors. All rights reserved.
|Appears in Collections:||Producción científica UdeG|
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