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This paper describes the development of a voltammetric assay of insulin using a DNA immobilized onto a carbon nanotube paste electrode (CNPE), the peak potential of which was 0.2 V, vs. Ag/AgCl on the CNPE. The cyclic voltammetry (CV) and square-wave (SW) stripping voltammetry parameters of the optimized conditions were determined. Low analytical working ranges of 10-80 ugL-1 CV and 0.01-0.1 ngL-1 SW were attained. The precision of the insulin concentration of 0.01 ugL-1 was 0.14 (n = 15) RSD using the optimum conditions, in which the detection limit was 0.004 ngL-1 (6.9 × 10-12 M) (S/N = 3) using only an accumulation time of 400 s. The developed method was applied to determine insulin in a pharmacy drug from analytical-grade chemicals (from Aldrich).

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Staphylococcus aureus bacteria is a ubiquitous Gram-positive microorganism that causes infections related to the sudden infant death syndrome. Recently, basic detection methods depend on complicated PCR amplification, electric separation, spectric adsorption and other detection systems. However, in this study, simplified sensitive voltammetric skills are developed. To identify an effective diagnostic method for Staphylococcus aureus (SA), a voltammetric sensing probe was sought using mercury immobilized on a carbon nanotube sensor (MCN). The voltammetric MCN conditions were optimized through stripping and cyclic voltammetry. Diagnostic electrolyte was used on non-treated blood sera as an electrolyte solution. The optimum cyclic and stripping analytical working range was 0.5-4.0 mL (3 × 102~5 × 102 CFU/0.5 mL) SA. The statistic relative standard deviation of 0.1 mL SA was observed to be 0.0078 (n = 5). Using the optimum parameters, a diagnostic test was performed by the direct assay of SA in non-treated human blood and patient sera. Here, the developed results can be used for the direct assay of non-treated blood sera, organ monitoring, in-vivo diagnosis, and other assays requiring SA detection.

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OBJECTIVES: This study assesses physicians' attitudes on the importance of working with colleagues who share the same ethical or moral outlook regarding morally controversial healthcare practices and examines the association of physicians' religious and spiritual characteristics with these attitudes. METHODS: We conducted a secondary data analysis of a 2009 national survey that was administered to a stratified random sample of 1504 US primary care physicians (PCPs). In that dataset, physicians were asked: "For you personally, how important is it to work with colleagues who share your ethical/moral outlook regarding morally controversial health care practices?" We examined associations between physicians' religious/spiritual characteristics and their attitudes toward having a shared ethical/moral outlook with colleagues. RESULTS: Among eligible respondents, the response rate was 63% (896/1427). Overall, 69% of PCPs indicated that working with colleagues who share their ethical/moral outlook regarding morally controversial healthcare practices was either very important (23%) or somewhat important (46%). Physicians who were more religious were more likely than nonreligious physicians to report that a shared ethical/moral outlook was somewhat/very important to them (P < 0.001 for all measures of religiosity, including religious affiliation, attendance at religious services, intrinsic religiosity, and importance of religion as well as spirituality). Physicians with a high sense of calling were more likely than those with a low sense of calling to report a high importance of having a shared ethical/moral outlook with colleagues regarding morally controversial healthcare practices (multivariate odds ratio 2.5, 95% confidence interval 1.5-4.1). CONCLUSIONS: In this national study of PCPs, physicians who identified as religious, spiritual, or having a high sense of calling were found to place a stronger emphasis on the importance of shared ethical/moral outlook with work colleagues regarding morally controversial healthcare practices. Moral controversy in health care may pose a particular challenge for physicians with lower commitments to theological pluralism.

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This article was migrated. The article was marked as recommended. Background Little is known regarding U.S. medical students with close family relatives who are physicians. Family-related factors may influence students' specialty decisions to enter primary care or practice among the underserved. Methods Self-administered questionnaires were sent to 960 third-year U.S. medical students from 24 U.S. allopathic medical schools in January 2011. We asked respondents whether or not they had a physician parent or grandparent. We also tested associations between physician relative status and demographics, educational factors and career intentions. Results Response rate was 61% (564/919). Among the respondents, 124 students (22.0%) responded that they had a physician relative. Students having a physician relative were less likely to intend to practice among the underserved and enter into a primary care specialty (all P-values < 0.05). Having a physician relative was negatively associated with intention to practice among the underserved (odds ratio, 0.37; 95% confidence interval, 0.16-0.87) in multivariate logistic estimation controlling for socio-demographics and educational factors. Conclusion Students who reported having a physician parent or grandparent were less likely to be reporting intentions to practice among the underserved. More studies are needed to identify whether physician relative status represents an important factor for future career trajectories or serve merely as a surrogate for other socioeconomic factors.

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Aortic valve stenosis is the most common valvular disease in the elderly population. Presently, there is increasing evidence that aortic stenosis (AS) is an active process of lipid deposition, inflammation, fibrosis and calcium deposition. The pathogenesis of AS shares many similarities to that of atherosclerosis; therefore, it was hypothesized that certain lipid interventions could prevent or slow the progression of aortic valve stenosis. Despite the early enthusiasm that statins may slow the progression of AS, recent large clinical trials did not consistently demonstrate a decrease in the progression of AS. However, some researchers believe that statins may have a benefit early on in the disease process, where inflammation (and not calcification) is the predominant process, in contrast to severe or advanced AS, where calcification (and not inflammation) predominates. Positron emission tomography using 18F-fluorodeoxyglucose and 18F-sodium fluoride can demonstrate the relative contributions of valvular calcification and inflammation in AS, and thus this method might potentially be useful in providing the answer as to whether lipid interventions at the earlier stages of AS would be more effective in slowing the progression of the disease. Currently, there is a strong interest in recombinant apolipoprotein A-1 Milano and in the development of new pharmacological agents, targeting reduction of lipoprotein (a) levels and possibly reduction of the expression of lipoprotein-associated phospholipase A2, as potential means to slow the progression of aortic valvular stenosis.

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