Stable isotope analysis is recognized as a powerful tool for monitoring, assessing, and validating in-situ bioremediation processes. In this study, kinetic carbon isotope fractionation factors (epsilon) associated with the aerobic biodegradation of vinyl chloride (VC), cis-1,2-dichloroethylene (cDCE), and trichloroethylene (TCE) were examined. Of the three solvents, the largest fractionation ef...

Fractionation of cells into their subcellular components has long been a central approach in cell biology. Subcellular fractionation techniques have been used widely to study structure and function of organelles and subcellular compartments, as well as to examine the location, processing, and trafficking of molecular components. The object of most subcellular fractionation procedures is to obta...

BACKGROUND & OBJECTIVE Radiotherapy is an important treatment for nasopharyngeal carcinoma (NPC). Timing of radiotherapy has attracted more attention nowadays. This study was to assess the efficacy of accelerated fractionation (six fractions per week) versus conventional fractionation (five fractions per week) for NPC, thus to improve treatment efficacy without increasing complications. METHO...

background: the exposure of cell lines to low-dose irradiation leads to changes at molecular level, which may induce adaptive response. we examined radio-adaptive doses effect on human colorectal adenocarcinoma cell line (ht29) and human fetal fibroblasts (mrc5) cell line followed by hyper and hypo fractionation regimes, with main purpose to decrease cell viability in ht29, and at the same time...

Primary features of hydrogen and carbon isotope fractionation during toluene degradation were studied to evaluate if analysis of isotope signatures can be used as a tool to monitor biodegradation in contaminated aquifers. D/H hydrogen isotope fractionation during microbial degradation of toluene was measured by gas chromatography. Per-deuterated toluene-d(8) and nonlabeled toluene were supplied...

End products are returned in all or in part to the country of the supplier of plasma. The costs involved in establishing a contract fractionation program are substantially less than those involved in establishing and operating a fractionation plant. In the absence of a local fractionation plant, products originating from plasma collected locally can be made available using contract fractionatio...

[1] Longitudinal and diel measurements of dual isotope composition (dN and dO) in nitrate (NO3-N) were made in the Ichetucknee River, a large ( 8 m s ), entirely spring-fed river in North Florida, to determine whether isotopic variation can deconvolve assimilatory and dissimilatory removal. Comparing nitrate concentrations and isotope composition during the day and night we predicted (1) daytim...

Computational cognitive neuroimaging approaches can be leveraged to characterize the hierarchical organization of distributed, functionally specialized networks in the human brain. To this end, we performed large-scale mining across the BrainMap database of coordinate-based activation locations from over 10,000 task-based experiments. Meta-analytic coactivation networks were identified by joint...