Much less has been reported on the stability of pyridoxinel than on the other vitamins that have been isolated in crystalline form. Such information is essential in studies of pyridoxine metabolism, in assays for the vitamin, and in the preparation and preservation of pharmaceutical products. In the present paper are presented data on the effect of light, heat, acids, alkali, and oxidizing agen...

Concept mapping has become a popular learning tool. However, the processes underlying the task are poorly understood. In the present study, we examined the effect of creating a concept map on the processing of item-specific information. In 2 experiments, subjects learned categorized or ad hoc word lists by making pleasantness ratings, sorting words into categories, or creating a concept map. Me...

When the necessary conditions for a BIBD are satisfied, but no BIBD exists, there is no simple answer for the optimal design problem. This paper identifies the E-optimal information matrices for any such irregular BIBD setting when the number of treatments is no larger than 100. Aand D-optimal designs are typically not E-optimal. An E-optimal design for 15 treatments in 21 blocks of size 5 is f...

Metabolites of the tobacco-specific nitrosamine, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone, a potent pulmonary carcinogen, have been quantified in the urine of 11 smokers. They were not detected in nonsmokers' urine. The metabolites, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol and its glucuronide, were detected in quantities of 0.23-1.0 and 0.57-6.5 micrograms/24 h, respectively. The res...

The recent report on the Scientific Foundations for Future Physicians (SFFP) and the revised Medical College Admissions Test (MCAT) reframe the preparation for medical school (and other health professional schools) in terms of competencies: what students should know and be able to do with that knowledge, with a strong emphasis on scientific inquiry and research skills. In this article, we will ...

The January 2011 issue includes 6 papers that are copublished by Chronic Diseases in Canada (CDIC) and Preventing Chronic Disease (PCD). In this example of copublishing, each journal is the primary publisher of 3 of the papers and secondary publisher of the other 3. Copublication is uncommon among scientific journals; however, it does offer an opportunity for journals to reach a broader readers...

posed population. Cancer Epidemiol Biomarkers Prev. 2010;19(6):1557-1568. 6. US Dept of Agriculture Economic Research Service. Illinois state-level map. http://www.ers.usda.gov/data/ruraldefinitions/IL.pdf. Accessed June 1, 2011. 7. US Census Bureau. American FactFinder. http://factfinder.census.gov/home /saff/main.html?_lang=en. Accessed June 1, 2011. 8. Dellavalle RP, Schilling LM, Chen AK, H...

OBJECTIVE To examine the independent and combined associations of the components of physical fitness with academic performance among youths. STUDY DESIGN This cross-sectional study included a total of 2038 youths (989 girls) aged 6-18 years. Cardiorespiratory capacity was measured using the 20-m shuttle run test. Motor ability was assessed with the 4×10-m shuttle run test of speed of movement...

7 Biggeri M., Libanora R., Anich R., and Mariani S. (2006b), ‘Street children in Kampala: understanding capabilities deprivation through a participatory methods’, paper presented at the 5th Annual Conference of the HDCA, Aug.-Sept. 2006, University of Groningen. Gordon D., Nandy S., Pantazis C., Pemberton S. and Townsend P. (2003), Child Poverty in the Developing World, UNICEF, New York. Mehrot...