Ralph Keng-Jung Yeh

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The information acquired from vast amount of operation data is a critical asset in today's fierce business competition arena (Marakas, 2003). Data visualization is a relatively new method to tap the knowledge treasures hide in data warehouse (Mirel 1998; Roth et al, 1997). According to Ahrens et al (2001), the size of dataset in data visualization tasks(More)
The U937 cell line is a monoblast-like cell line that can be induced to differentiate when treated with phorbol ester or a variety of other agents. Collagenase was detected in the media of U937 cell cultures after treatment with phorbol myristate acetate (PMA) at concentrations of 5 ng/mL or greater. In general, no collagenase was detected in the media of(More)
Polymorphonuclear leukocytes (PMNLs) store collagenase in an inactive form in secretory granules. The enzyme can be activated in vitro by limited proteolysis or by sulfhydryl-modifying agents such as N-ethylmaleimide (NEM). We have enriched NEM-activated collagenase 820-fold using granule isolation, gel filtration, and wheat germ agglutinin (WGA)-agarose(More)