• Proceedings of the KOR-BRONCHOESO Conference
• /
• 1981.05a
• /
• pp.14.1-14
• /
• 1981

Neurofibroma are slow growing benign tumors arising from the neurilemal sheath (Schwann cells) and fibroblasts of the peripheral nerve. This benign tumor may occur as a solitary lesion or as a part of the syndrome of neurofibromatosis. The neurofibroma of oral tissues is rare in otolaryngologic field and usually presents as a firm, elevated, nonpainful lesion that shows the usual histologic findings of a neurofibroma or neurilemmoma. Recently, we have experienced a neurofibroma arising from the tongue in a 54 year old female and removed successfully under local anesthesia. No evidence of recurrence has been observed up to date.

• Journal of the Korean Vacuum Society
• /
• v.18 no.1
• /
• pp.44-48
• /
• 2009

The effect of temperature gradient between the substrate and ambient gas on the structural characteristics of GaN nanorods grown on r-plane sapphire substrates by hydride vapor phase epitaxy was investigated. The density, diameter, and length strongly depended on the tempearture gradient. In addition, the cross-sectional shape of the nanorrods at the end of growth was found to be more dependedent on the temperature of a substrate itself than the temperature gradient.

• Journal of Life Science
• /
• v.13 no.2
• /
• pp.191-196
• /
• 2003

The ars gene of the Neurospora crassa encodes arylsulfatase and is expressed under sulfur limitation. An ars-1 promoter(Pars) translationally-fused to a lacZ gene was transformed into the N. crassa RLM 35-35, a his-3 inl strain and integrated into the his-S locus by a single crossover homologous recombination. $\beta$-galactosidase specific activity was measured from mycelia grown in sulfur-limited Vogel's medium. Enzyme activity reached its maximum at 14 hour after the shift to derepressing condition. When activity from homokaryon generated by microconidiation was measured, it was 17% a higher than that from heterokaryon.

• Journal of the Korean association of regional geographers
• /
• v.14 no.5
• /
• pp.573-586
• /
• 2008

Many studies of Korean immigrants in America reveal that about 70% of them attend a Korean church. Within Korean immigrant churches members exchange information and advice while they maintain their cultural traditions and ethnic norms. Recently some 2nd-generation Koreans have gradually started their own Korean congregations, known as English ministries(EMs) while some of them leave their Korean Christian churches. The future of Korean ethnic society in America depends much on the extent of 2nd-generation Koreans' retention of their ethnic culture.

• Journal of Plant Biotechnology
• /
• v.47 no.1
• /
• pp.73-77
• /
• 2020

This study was conducted to examine the vitality of Bletilla striata Rchb.f. seed treated with different concentrations sodium hypochlorite (NaOCl) for different lengths of time. This study also examined the effect of NaOCl treatment times and concentrations on swelling formation and seed germination of B. striata seed. The non-treated B. striata seed had the highest survival rate (82.7%) Treatment with more than 1.5% NaOCl negatively affected the seed survival rate, as compared to concentrations of less than 1%. The swelling formation and seed germination percentages were highest (90.1% and 94.1%, respectively) when seeds were treated with 0.5% NaOCl for 20 min. These results can be used as important basic data for the growth and restoration of B. striata and further suggest the possibility of individual restoration in habitats.

• Journal of the Korean Society of Radiology
• /
• v.82 no.6
• /
• pp.1589-1593
• /
• 2021

Rheumatoid nodules are the most common extra-articular presentations of rheumatoid arthritis. Although rheumatoid nodules can develop anywhere in the body, they develop most commonly in the subcutaneous region, where they are easily exposed to repetitive trauma or pressure. However, an infrascapular presentation has not yet been reported. We report a case of giant bilateral rheumatoid nodules that developed in the infrascapular area, complicating its distinction from elastofibroma dorsi on radiological examination.

• Journal of the Korean Society of Radiology
• /
• v.82 no.5
• /
• pp.1297-1303
• /
• 2021

Pancreatic collision tumors are rare neoplasm, and cases consisting of ductal adenocarcinoma with a neuroendocrine tumor, intraductal papillary mucinous neoplasm with a neuroendocrine tumor, and solid pseudopapillary neoplasm with a neuroendocrine tumor have been reported. We report a case of a rapidly growing pancreatic collision tumor consisting of desmoid-type fibromatosis and mucinous cystic neoplasm in a 30-year-old pregnant female. To the best of our knowledge, this is the first reported case of a pancreatic collision tumor consisting of desmoid-type fibromatosis and mucinous cystic neoplasm.

• 한국해양학회지
• /
• v.18 no.2
• /
• pp.161-168
• /
• 1983

Age composition and reproductive period o the shad, Konosirus punctatus, in Cheonsu Bay were determined though analysis of sizi, ane and maturity of fish. Sampses were collected with trap in the bay mouth from May, 1981 to December, 1982. Shads start entering the bay for feeding and spawning in spring when water temperature exceeds 8$^{\circ}C$. They stay in inner part of the bay in summer nad move out to sea in autumn before water trmperature decreasea to 8$^{\circ}C$. Fish grows very rapidly during first summer after birth. Mean lengthes of 1-4 year old fishes were 12.2cm, 15.8cm, 17.6cm and 20.9cm, respectively. The largest and oldrst fish pbserved was 22.0cm long with age 4. Shads of Cheonsu Bay reach maturity at 2 years old at the size greater then 14cm. Data on size and age at first maturityindicate thzt maturity of shad depends on size and not on age. Spawning occurs from late April to late May when water temperature is between 8$^{\circ}C$ and 15$^{\circ}C$.

• 한국생물공학회:학술대회논문집
• /
• 2000.04a
• /
• pp.470-473
• /
• 2000

Since the biosynthetic production of indigo and indirubin normally reflects a difficult process including the toxicity of indole to microorganisms, only several bacterial strains have been exploited to produce indigo and indirubin from indole or its derivatives. P. savastanoi BCNU 106, which was a gram negative bacterium, was isolated and tolerant to 10% (v/v) toluene. The indole tolerance level of P. savastanoi BCNU 106 was as high as 160 mg/ml when toluene or p-xylene was added to the medium to 20% by volume. P. savastanoi BCNU 106 grown in a two-phase culture system containing indole(100 mg/ml) and P-xylene (0.2 ml/ml) produced P-xylene-soluble pigments, blue indigo and purple indirubin. Of the conditious tried, the production of indigo and indirubin was found only when P. savastanoi BCNU 106 was grown in the two-phase system overlaid with the organic solvents with appropriate polarity. This study may illustrate that the isolated extremophile P. savastanoi could be used in the microbial conversion process of the industrial potentials.

• Journal of Life Science
• /
• v.16 no.3 s.76
• /
• pp.505-509
• /
• 2006

Membranes prepared from Bacillus cereus KCTC 3674, grown aerobically on a complex medium, oxidized NADH exclusively, whereas deamino-NADH was little oxidized. The respiratory chain-linkedNADH oxidase system exhibited an apparent $K_m$ value of about $65\;{\mu}M$ for NADH. Interestingly, the activity of NADH:DCIP oxidoreductase on NADH oxidase system was decreased remarkably by $Na^+$ or $K^+$, and its optimal pH was 5.5. The activity of NADH:DCIP oxidoreductase was very resistant to the respiratory chain inhibitors such as rotenone, capsaicin, and $AgNO_3$, whereas it was inhibited by about 40% with $40{\mu}M$ 2-heptyl-4-hydroxyquinoline-N-oxide (HQNO). From the results, we suggest the possibility that the aerobic respiratory chain-linked NADH oxidase system of B. cereus KCTC 3674 may possess the HQNO-sensitive NADH:DCIP oxidoreductase lacking an energy coupling site.