in this work, a tracer study on pore initiation in anodic alumina in oxalic acid was performed. effects of some experimental parameters such as applied electrical potential, electrolyte composition and heat pretreatment were evaluated. electrochemical and morphological experiments were performed using potentiostatic anodizing and scanning electron microscopy (sem) techniques, respectively. effe...

Stable isotope tracer methodologies are becoming increasingly widespread in metabolic research; yet a number of factors restrict their implementation, such as, i.v infusions, multiple cannulae, tissue samples, and significant cost. We recently validated the sensitivity of the orally administered stable isotope tracer deuterium oxide (D2O) for quantifying day-to-day changes in muscle protein syn...

Galactic cosmic rays are investigated with complementary techniques above the atmosphere and on ground. Recent results of two experiments, the TRACER balloon experiment and the KASCADE air-shower detector are discussed. 2006 COSPAR. Published by Elsevier Ltd. All rights reserved.

The era of imaging neuroreceptors in humans with PET was ushered in by Wagner et al. (1983) with a report in Science showing the first human brain scan of dopamine receptors (Wagner, 1983). The tracer was N-methylspiperone (NMSP) tagged with carbon-11. The brain that was scanned belonged to one of the authors. Ethical concerns notwithstanding, this act placed the researchers in the good company...

Skeletal involvement is the second most common site of metastases after lymph nodal metastases in patients with prostate cancer. The skeletal metastases from prostate cancer are osteoblastic in nature and show increased tracer avidity on the bone scan. Focal tracer avid lesion in skeleton especially in skull requires the careful examination by further investigation. The patients with skull meta...

We present simulations of cumulus convection over land with shortwave radiation computed by a Monte Carlo ray tracer coupled to the flow solver. Ray tracing delivers very realistic in-cloud heating rates and global horizontal irradiance fields. The necessary performance has been enabled raw power GPU computing from techniques for accelerating data lookup convergence. used case study grassland i...

The relationship between tracer velocities and wave or wetting front celerities is essential to understand water flowing from hillslopes to the stream. The connection between maximum velocity and celerities estimated by means of experimental techniques has not been explored. To assess the pattern of infiltrating water front and dominant flow direction, we performed sprinkling experiments at a t...