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허남호,최승호,양경헌,권용식 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.6
Aspergillus has been recognized in infections of the paranasal sinuses since 1891, and in invasive external otitis since 1985. Fungal mastoiditis is a very rare entity, which is almost exclusively sen in immunocompromised patients. The authors chronic intermittent otorrhea, otalgia and progressive hearing loss. On physical examination, attic destruction and adhesive tympanic membrane was sen in the right side. On temporal bone CT scans, soft tissue density was noted in the right mastoid antrum. After radical mastoidectomy, tissue pathology from mastoid cavity showed fungal ball of aspergillus. Fungal infec-tion of mastoid cavity is very rare, however, it can cause serious complications. So, we report here, with a review of literature, a case of fungal mastoiditis in an immunocompetent patient. (Korean J Otolaryngol 2002;45: )
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許南晧,金相洙,朴炳允 한국환경독성학회 1991 환경독성보건학회지 Vol.6 No.2
This study was carried out to develop the low-priced adsorbent by synthesizing the zeolite of high cation exchange capacity with the natural zeolite and to examine the adsorbing ability of this zeolite. The dominant clay minerals were clinoptilolite and mordenite in natural zeolite, while phillipsite in the synthesized zeolite. Adsorption reaction of NH₄^(+) on zeolite was reached equilibrium after 2 hrs. The amount of adsorption was increased with increasing the concentration of NH₄^(+) or the pH of suspension. The cation exchange capacity of zeolite was slightly decreased below pH 4.0 by acidic treatment. It was estimated that the ability of the synthesized zeolite to remove noxious ions was better than that of the natural zeolite.
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