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지용화,최보람,허경회,안창현,이삼선 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2
The present study reports a case of inverted papilloma of the nasal cavity and infiltrating into the maxillary sinus. Inverted papilloma is an uncommon and locally aggressive benign tumor of the sinonasal region. The patient, 51-year-old male, presented with unilateral nasal obstruction and periodic swelling on the palate without pain. Enhanced CT scan revealed a heterogeneously enhancing solid mass in the nasal cavity and infiltrating into the right maxillary sinus, as well as an incidental, secondarily infected residual cyst m the periapical area of the right maxillary canine. The sinonasal mass was revealed as an inverted papilloma on histopathologic examination.
邊龍聖,金東碩,邊東壽,崔雲行,洪慶和,鄭寶鉉 弘益大學校 1991 弘大論叢 Vol.23 No.2
A great many students are working for their mathematics learning in secondary schools and nevertheless its learning effect is rather low. This phenomenon is largely due to a biased social recognition. Furthermore the educational environment including big class size and ability differences enlarge such a difficulty. This study aims at seeking an improving device to enhance learning efficiency under the circumstances. Questionaires about problem finding of teachers educational activity and mathematics teaching were distributed and collected. Data were analyzed to establish a desirable mathematics education and teaching. Devices for individualized instruction and learning tasks and evaluation methods were proposed. This recommendations are supposed to be an improving way for students' mathematics learning. In relation to this result, a further study is strongly required and adminstrative supports by government are badly needed to achieve such a goal.
Hypoxia-inducible factor-1α-mediated SERPINE-1 expression in ischemic urinary bladder
Choi Bo-Hwa,조태진,이택,Park Chang-Shin 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.2
Background Increasing cyclic pressure on the bladder in urodynamic changes results in tissue hypertrophy, triggering hypoxia-related molecular mechanisms, and promoting bladder tissue remodeling. The etiology and causative mechanisms of Hif-1α-derived tissue remodeling remain unclear. Objective This study aimed to examine the hypothesis that hypoxia-related pathways and potent gene expression profi les may be associated with pathological symptoms such as detrusor over-activity and increased urinary frequency. Thus, we suggest that Hif-1α-mediated target gene expression is related to the major connections between urodynamic changes and diff erentially expressed genes (DEGs) in one control (Sham) and two experimental models, partial bladder outlet obstruction (PBOO), and de-obstructed (DeObs) rats. Results In cystometric measurements, the pressure and volume of the PBOO and DeObs rat groups showed signifi cant diff erences compared to the sham group, but there were no signifi cant diff erences between the PBOO and DeObs groups. Among the DEGs, the expression levels of many genes largely altered in the PBOO group were normalized in the DeObs group. These diff erences between the activities of cystometric parameters and RNA-seq-based DEGs patterns, identifi ed in the comparisons of the three groups, were not consistent. In contrast, the fi ve genes ( ALDH3A1, CYP1A1, SERPINE1, CYBB, and PLOD2 ), based on the FPKM units, were the most predictable, and Hif-1α-induced SERPINE1 and PLOD2 genes might be related to the progression of bladder tissue remodeling, such as hypertrophy and fi brosis. SERPINE1 dominantly expressed in BSMCs was one gene matched between protein expression levels and enriched FPKM values. Conclusions Expression of Hif-1α-mediated SERPINE 1 induced under hypoxia may be linked to pathological bladder tissue remodeling outcomes. Thus, we propose that alterations in SERPINE 1 expression induced in cyclic hypoxia-exposed bladders may be related to tissue hypertrophy and/or fi brosis.
Choi, Sung-Hwa,Lee, Sung Bo,Kim, Young-Woong,Kim, Chang Kyung,Choi, Duck-Kyun Elsevier 2006 THIN SOLID FILMS - Vol.503 No.1
<P><B>Abstract</B></P> <P>The effect of the alternating field (AC voltage) instead of the static field (DC voltage) was investigated in the field-aided lateral crystallization process, which is one of the low temperature crystallization processes for the amorphous silicon films. Using a photolithography process, a 5-mm-wide bar-shaped photoresist (PR) pattern was formed on the <I>a</I>-Si. On the PR-patterned <I>a</I>-Si, a 2–3-nm-thick Cu catalyst layer was deposited by a DC sputtering, and then, the Cu layer on the PR pattern was lifted off. The silver electrodes were pasted at the opposite sides of the Cu-free bar pattern. Then, the patterned specimen was annealed at 500 °C in N<SUB>2</SUB> ambient for 5 h with the application of various AC fields (ranging from 1 to 5 V/cm) along with a DC field of 30 V/cm. As compared with the case of a DC field of 35 V/cm only, the specimen from a mixed field of 30 V/cm DC and 5 V/cm AC resulted in 1.5 times faster crystallization rate, regardless of experimental frequency values ranging from 10 Hz to 50 MHz. Presumably, the enhancement of the crystallization rate under the combined field is associated with an increase in the flux of the crucial diffusion species, Cu atoms, which govern the overall crystallization rate due to the effect by the AC field.</P>