Vincent Schneider

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The photolytic decomposition of the insecticide imidacloprid (1) in HPLC grade water and of imidacloprid as the formulated product Confidor insecticide in tap water was studied using HPLC methodology. The structures of several degradates have been determined in aquatic medium, and the DT(50) values of imidacloprid and Confidor have been measured. In(More)
Physical and biological evidence supports the probable existence of an enclave of relatively warm climate located between the Southern Appalachian Mountains and the Atlantic Ocean in the United States during the Last Glacial Maximum. The region supported a mosaic of forest and prairie habitats inhabited by a "Floridian" ice-age biota. Plant and vertebrate(More)
STUDY OBJECTIVE to characterize the high mortality rate by ischemic heart disease in Azores, by evaluating the main coronary heart disease risk factors prevalence in the population. DESIGN sample study referring the population of 5 islands: 37 counties. Aleatory choose in the electoral lists. SETTING the selected individuals were convocated by mail to(More)
PURPOSE To estimate the association between signal characteristic of dynamic enhanced MRI using curve types and angiogenesis in solitary pulmonary nodules. MATERIALS AND METHODS Thirty-six patients with a solitary pulmonary nodule (SPN) ranging in size from 6 to 37 mm (median 17 mm) underwent dynamic contrast enhanced MRI with a time interval of 10 s over(More)
An isocratic high-performance liquid chromatographic separation of creatine, uric acid and creatinine with direct on-column application of the serum sample has been developed. The pre-column, used for sample clean-up, is switched out of the eluent flow after a definite time. Simultaneous three-wavelength detection with a diode array detector allows a very(More)
STUDY OBJECTIVE to determine the existence of circadian variability (CV) of single ventricular premature beats (VPBs) and study its relationship with the heart rate variation; to compare sub-groups of patients (Pts) with and without antiarrhythmic therapy and with ischemic cardiopathy versus a free structural cardiopathy group. DESIGN retrospective study.(More)
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