Because it is present in such small concentrations, isolation of polonium from natural sources is a very tedious process.
The November 2002 report measured residential segregation in the nation's larger cities using five indices, calculating clustering, concentration, centralisation, isolation and dissimilarity in the living patterns of different racial groups.
Claybourne Elder does assured work as the two Georges, conveying Seurat's concentration and isolation (I wish they could find a more persuasive beard), then the mix of idealism and uncertainty in the 1980s George.
Thirty-three patients (26.4%) had acquired psychological symptoms (depression, anxiety, or subjective complaints about memory or concentration) in isolation or in combination (P = 0.017).
They can improve concentration and reduce isolation.
Applications include liquid processing to effect clarification, product isolation, concentration and/or separation (Gautam and Menkhaus 2014).
Advanced bio-selective sensors may meet the requests for isolation, concentration of the agents and their real-time detection.
Solid-phase microextraction (SPME) is a solvent-less sample preparation method which combines sample preparation, isolation, concentration and enrichment into one step.
Based on general separation principles and insights obtained from industrial processes for specific products, we first identify four separation stages: cell treatment, product phase isolation, concentration and purification, and refinement.
