• Proceedings of the PSK Conference
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• 2002.04a
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• pp.187.3-188
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• 2002

• Proceedings of the Korean Society of Life Science Conference
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• 2003.10a
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• pp.90-90
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• 2003

• Proceedings of the Korean Society of Life Science Conference
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• 2000.09a
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• pp.32-32
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• 2000

• Clinical Endoscopy
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• v.57 no.3
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• pp.335-341
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• 2024

Background/Aims: The coronavirus disease 2019 pandemic has affected the worldwide practice of upper gastrointestinal endoscopy. Here we designed a modified N95 respirator with a channel for endoscope insertion and evaluated its efficacy in upper gastrointestinal endoscopy. Methods: Thirty patients scheduled for upper gastrointestinal endoscopy were randomized into the modified N95 (n=15) or control (n=15) group. The mask was placed on the patient after anesthesia administration and particles were counted every minute before (baseline) and during the procedure by a TSI AeroTrak particle counter (9306-04; TSI Inc.) and categorized by size (0.3, 0.5, 1, 3, 5, and 10 ㎛). Differences in particle counts between time points were recorded. Results: During the procedure, the modified N95 group displayed significantly smaller overall particle sizes than the control group (median [interquartile range], 231 [54-385] vs. 579 [213-1,379]×10³/m³; p=0.056). However, the intervention group had a significant decrease in 0.3-㎛ particles (68 [-25 to 185] vs. 242 [72-588] ×10³/m³; p=0.045). No adverse events occurred in either group. The device did not cause any inconvenience to the endoscopists or patients. Conclusions: This modified N95 respirator reduced the number of particles, especially 0.3-㎛ particles, generated during upper gastrointestinal endoscopy.

• Bulletin of the Korean Chemical Society
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• v.24 no.5
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• pp.623-626
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• 2003

Nematophin and its analog incorporating tryptamine unit have been isolated and characterized from strain XRPC of a symbiotic bacterium Xenorhabdus nematophilus, which was newly isolated from Korean entomopathogenic nematodes. The stereoselective synthesis of these compounds was accomplished, and the relative configurations were determined. Nematophin exhibited potent antibacterial activities over several strains of methicillin-resistant S. aureus (MRSA) comparable to those of vancomycin.

• Asian-Australasian Journal of Animal Sciences
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• v.2 no.3
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• pp.370-371
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• 1989

• Proceedings of the Korean Society of Plant Pathology Conference
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• 2002.11a
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• pp.49.1-49
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• 2002

• Proceedings of the Korean Society of Plant Pathology Conference
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• 2002.11a
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• pp.48-49
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• 2002

• Proceedings of the Korean Society of Plant Biotechnology Conference
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• 2005.11a
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• pp.196-196
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• 2005

• Proceedings of the Korean Society of Crop Science Conference
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• 2001.05a
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• pp.240-241
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• 2001