S.-K. Lee

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Bacillus amyloliquefaciens CH51, an isolate from cheonggukjang, Korean fermented soyfood, secretes several enzymes into culture medium. A gene encoding 19 kDa xylanase was cloned by PCR. Sequencing showed that the gene encoded a glycohydrolase family 11 xylanase and named xynA. xynAHis, xynA with additional codons for his-tag, was overexpressed in(More)
A radio-frequency tunable atomic magnetometer is developed for detection of nuclear quadrupole resonance ͑NQR͒ from room temperature solids. It has a field sensitivity 0.24 fT/ Hz 1/2 at the 423 kHz 14 N NQR frequency of ammonium nitrate. A potential application of the magnetometer is detection of nitrogen-containing explosives which is difficult with(More)
ENSO is by far the dominant player in global year-to-year climate variability, with worldwide impacts on weather, natural disasters, agriculture, fisheries, and natural ecosystems. Understanding and predicting the future behavior of ENSO is thus central to NOAA's mission and highly relevant to society. Prior studies had shown divergent results for the(More)
High-permeability magnetic shields generate magnetic field noise that can limit the sensitivity of modern precision measurements. We show that calculations based on the fluctuation-dissipation theorem allow quantitative evaluation of magnetic field noise, either from current or magnetization fluctuations, inside enclosures made of high-permeability(More)
BACKGROUND Neuropathic arthropathy of the elbow is rare and characterized by a painless but unstable articulation. The functional capacity of patients with this condition has not been reviewed in detail. METHODS Five male patients, with an average age of fifty-one years, were treated for neuropathic arthropathy of the elbow. The underlying conditions(More)
Sexual dysfunction is a common problem among patients with ankylosing spondylitis (AS). This study was an open-label study without placebo to assess sexual dysfunction in male patients with AS, and to determine whether sexual function might improve with the use of tumor necrosis factor (TNF)-alpha blockers. Twenty-two males with AS (age, 29-48 years) were(More)
Balloon angioplasty of ostial left anterior descending coronary artery (LAD) lesions has been associated with a high rate of acute complications and late restenosis. Recently, coronary stenting has been proposed as an effective treatment modality for ostial LAD lesions. To evaluate the effects of stent design on the development of late restenosis, we(More)