The use of aqueous mixed micellar system consisting of sodium dodecyl sulfate (SDS) and polyoxyethylene (23) dodecanol (Brij-35) as the mobile phase in reversed-phase liquid chromatography was studied. A group of chlorophenols was used as the test mixture. Adding organic modifier to the system showed that the use of low concentrations of organic additives improves efficiency in SDS/Brij-35 mixe...

The introduction of single site catalysts and multiple reactor technology allows the design of new Polyolefin resins with improved properties for each particular application, and the Chemical Composition Distribution (CCD) has become the most discriminating microstructure parameter in these polymers. The proper analysis of the CCD necessarily requires a fractionation process, typically done acc...

To address concerns of late and very late stent thrombosis associated with first generation drug-eluting stent technology, novel approaches are being tested including stents with bioabsorbable polymers (including Biomatrix FlexTM, NoboriTM and SynergyTM), polymer-free drug delivery systems (including BiofreedomTM and Yukon®) and drug-eluting balloons (including Sequent PleaseTM, Dior® II and Pa...

Functional and clinical transfusion studies were carried out on granulocytes eluted from nylon filters using ACD Saline solutions and 20% CPD Plasma ACD Saline solutions. Although the average volume of blood and total number of granulocytes filtered were the same, the yield of granulocytes eluted form the filters was 20% greater when 20% CPD plasma was in the eluting solution. Function studies ...

Antibiotics are commonly mixed with polymethylmethacrylate (PMMA) cement to suppress severe periprosthetic infections associated with total joint arthroplasty. The relationship between antibiotic concentration and the resulting elution kinetics remains unclear. The purpose of this study was to characterize the release of daptomycin from PMMA cement and the subsequent effects on mechanical prope...

This study was designed to determine which combination of sorbent-trap and elution solvent provided the most efficient automated method of collection in supercritical fluid extraction (SFE), elution of analytes, and clean-up of orange, sweet potato and green bean extracts for analysis of 56 diverse pesticides using GC-ion-trap MS. The solid-phase traps evaluated consisted of octyldecylsilane (O...

OBJECTIVES Ti, which is biocompatible and resistant to corrosion, is widely used for dental implants, particularly in patients allergic to other materials. However, numerous studies have reported on Ti allergy and the in vitro corrosion of Ti. This study investigated the conditions that promote the elution of Ti ions from Ti implants. METHODS Specimens of commercially pure Ti, pure nickel, a ...

Ultra-high performance liquid chromatography (UHPLC) appears recently to have the potential to replace the less environment-friendly analytical techniques. In the current work, a new eco-friendly, simple and rapid UHPLC method has been developed for the simultaneous determination of MTX and FA in human urine. The UHPLC analysis has been carried out on a Titan C18 column (100x2.1 mm, 1.9 μm) u s...

Mingquan Yan a*, , Gregory Korshin , Dongsheng Wang c 3 a Department of Environmental Engineering, Peking University, The Key Laboratory 4 of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China; 5 b Department of Civil and Environmental Engineering, University of Washington, Box 6 352700, Seattle,WA 98195-2700, United States 7 c State Key Laboratory of Environmental Aquati...