نتایج جستجو برای: perkin
تعداد نتایج: 861 فیلتر نتایج به سال:
1 Earth and Ocean Sciences and Ryan Institute, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland, 2 Zoology and Ryan Institute, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland, 3 Irish Centre for Research in Applied Geoscience, Earth and Ocean Sciences, School of Natural Sciences, National University of Ireland Galway, Galway, ...
In this study, the bioactive compounds of Vernonia cinerea have been evaluvated using GC-MS. The chemical compositions of the whole plant methanol extract of Vernonia cinerea were investigated using Perkin-Elmer Gas Chromatography Mass Spectroscopy. GC-MS analysis of V. cinerea plant methanol extract revealed the existence of the GC-MS chromatogram of the seven peaks presented .The major compou...
A procedure is described for the simultaneous, automatic determination of serum calcium and magnesium with the AutoAnalyzer, and a dualchannel, double-beam atomic absorption spectrophotometer, the IL Model 153. Advantages over existing procedures include a high rate of analysis (90 samples or 180tests per hour) and low sample consumption (a total of 30 l for both determinations). We have compar...
Instruments. NMR spectra were obtained with Bruker AC-300 and Varian UNITY-500 spectrometers. Mass spectra were obtained with Perkin Elmer Sciex API 365 electrospray ionization (ESI) and Bruker Biflex III matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) instruments at the University of Wisconsin Biotechnology Center. Ultraviolet and visible absorbance was recorded with a C...
Parents generally have the right to make medical decisions for their children. This right can be challenged when the parents’ decision seems to go against the child’s interests. The toughest such decisions are for a child who will survive with physical and neurocognitive impairments. We discuss a case of a 5-year-old boy who suffered a spinal injury as a result of a motor vehicle accident and w...
OBJECTIVE Lead poisoning can, in some cases, be traced to a specific route or source of exposure on the basis of the individual's blood lead isotope ratio. To assess the major source of lead exposure among women residing in Mexico City, we compared blood, ceramic, and gasoline lead isotope ratios. MATERIAL AND METHODS The study population, randomly selected from participants of a large trial,...
5. Radiochemistry 24 6. Laser scanning confocal microscopy 30 7. Two-photon excitation and fluorescence lifetime imaging microscopy 44 8. Kinetic stability testing in an aqueous environment 50 9. Stability assays to estimate kinetic stability against common biologically-relevant agents 55 10. In vivo imaging tests by microPET 62 11. Hypoxia selectivity testing 63 12. MTT assays 69 13. Cyclic vo...
Parents generally have the right to make medical decisions for their children. This right can be challenged when the parents’ decision seems to go against the child’s interests. The toughest such decisions are for a child who will survive with physical and neurocognitive impairments. We discuss a case of a 5-year-old boy who suffered a spinal injury as a result of a motor vehicle accident and w...
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