Wayne State University

About: Wayne State University is a education organization based out in Detroit, Michigan, United States. It is known for research contribution in the topics: Population & Cancer. The organization has 42801 authors who have published 82738 publications receiving 3083713 citations. The organization is also known as: WSU & Wayne University.

Simultaneous transesterification and esterification of unrefined or waste oils over ZnO-La2O3 catalysts

Abstract: A single-step method was developed for biodiesel production from unrefined or waste oils using a series of heterogeneous zinc and lanthanum mixed oxides. Effects of metal oxide molar ratio, free fatty acids (FFA) and water content in feedstock, molar ratio of methanol and oil, and reaction temperature on the yield of biodiesel were investigated. A strong interaction between Zn and La species was observed with enhanced catalyst activities. Lanthanum promoted zinc oxide distribution, and increased the surface acid and base sites. The catalyst with 3:1 ratio of zinc to lanthanum was found to simultaneously catalyze the oil transesterification and fatty acid esterification reactions, while minimizing oil and biodiesel hydrolysis. A reaction temperature window of 170–220 °C was found for the biodiesel formation. A high yield (96%) of fatty acid methyl esters (FAME) was obtained within 3 h even using unrefined or waste oils.

The College Sophomore as Guinea Pig: Setting the Record Straight

Abstract: The article presents a response to the 1986 article “‘The Science of the Sophomore’ Revisited: From Conjecture to Empiricism,” by M. E. Gordon, L.A. Slade, and N. Schmitt regarding using college students as subjects for organizational research. The author states that though the subject of the original paper is valid, it deserves further analysis, and offers two reasons why journal editors should consider studies that feature college student data. The author suggests that editors consider the relative usefulness of student and non-student samples and the interpretation of the between-subject differences.

The Mental Health of Black Caribbean Immigrants: Results from the National Survey of American Life

Abstract: Objectives. We examined the prevalence of psychiatric disorders among Black Caribbean immigrant (“Caribbean Black”) and African American populations and the correlates of psychiatric disorders among the Caribbean Black population.Methods. We conducted descriptive and age-adjusted analyses of the data from the National Survey of American Life—an in-person household mental health survey of noninstitutionalized US Blacks. We assessed psychiatric disorders as defined by Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition criteria with the Composite International Diagnostic Interview.Results. Compared with African American men, Caribbean Black men had higher risks for 12-month rates of psychiatric disorders. Caribbean Black women had lower odds for 12-month and lifetime psychiatric disorders compared with African American women. Risks varied by ethnicity, immigration history, and generation status within the Caribbean sample. First-generation Caribbean Blacks had lower rates of psychiatric di...

Longitudinal Relation between Endogenous Testosterone and Cardiovascular Disease Risk Factors in Middle-aged Men A 13-Year Follow-up of Former Multiple Risk Factor Intervention Trial Participants

Abstract: The present study examined lifestyle and behavioral correlates of the change in total testosterone over 13 years in 66 men aged 41-61 years who were former participants of the Multiple Risk Factor Intervention Trial (MRFIT) at the Pittsburgh, Pennsylvania, center. The authors also determined in these men if changes in total testosterone are related to changes in cardiovascular disease risk factors. The mean total testosterone level was 751 (standard deviation, 248) ng/dl at baseline and decreased by 41 (standard deviation, 314) ng/dl during follow-up. The correlation between measures was r = 0.44 (p < 0.001). In multivariate analysis, higher type A coronary-prone behavior score, greater pack-years of cigarette smoking, and the MRFIT special intervention group were associated with larger decreases in total testosterone. Age, body weight, weight change, leisure time activity level, and alcohol intake were not related to the change in total testosterone. The decrease in endogenous testosterone was associated with an increase in triglycerides and a decrease in high density lipoprotein cholesterol in multivariate analysis controlling for obesity and other lifestyle covariates. There was little relation between change in testosterone and change in total and low density lipoprotein cholesterol or blood pressure. This longitudinal study confirms a gradual decline in total testosterone levels with advancing age in older men and provides evidence that lifestyle and psychosocial factors are related to this decline. Decreases in endogenous testosterone levels with age in men are associated with potentially unfavorable changes in triglycerides and high density lipoprotein cholesterol.