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Secondary organic carbon (SOC) is often a significant portion of organic carbon (OC) in ambient particulate matter (PM). The levels and seasonal patterns of SOC in Hong Kong were examined using more than 2000 PM 10 measurements made over a 4.5-year period (1998–2002) in a network of ten air quality monitoring stations. The positive matrix factorization(More)
Secondary organic carbon (SOC) is often a significant portion of organic carbon (OC) in ambient particulate matter (PM). The levels and seasonal patterns of SOC in Hong Kong were examined using more than 2000 PM 10 measurements made over a 4.5-year period (1998–2002) in a network of ten air quality monitoring stations. The positive 5 matrix factorization(More)
A plant utilizing a two-step reaction process, which takes a 95% ethanol stream (by mass) and produces a 98% 1,3-butadiene stream, was designed for this project. The production goal for this plant was 200,000 tonnes of butadiene with the main motivation behind the project being the recent rise in butadiene prices. The process first passes ethanol through a(More)
BACKGROUND Severe postoperative knee contractures after arthroplasty or megaprosthesis reconstruction occur rarely, but are devastating complications. Management of preoperative flexion contractures is well-described, but there is a paucity of literature for surgical treatment of postoperative contractures. A retrospective chart review was performed for a(More)
This study explored three dimensional (3D) talonavicular joint (TNJ) coverage/orientation and bone morphology to reveal parameters that could classify and identify predispositions to cavus and planus feet. 3D models of 65 feet from 40 subjects were generated from computed tomography images classified as pes cavus, neutrally aligned, or(More)
The specificity and sensitivity of two commercial enzyme linked immunosorbent assays (ELISAs), Diamedix (Miami, Florida) and Lipogen (Noxville, Tennessee), were assessed and compared with haemagglutination and immunodiffusion assays. Sera from 53 patients with various connective tissue disorders were examined for the presence of antibodies to nuclear(More)
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