• 제목/요약/키워드: Seong Dae-Jung

검색결과 571건 처리시간 0.037초

아프리카 피그미 고슴도치에서 발생한 편평상피세포암종 (Squamous Cell Carcinoma in an African Pigmy Hedgehog (Atelerix Albiventris))

  • 김완희;김방현;박우람;장동우;정성목;윤정희;김대용;남치주
    • 한국수의병리학회지
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    • 제5권1호
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    • pp.1-4
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    • 2001
  • Squamous cell carcinoma was diagnosed in a 4.5-year-old male African hedgehog (Atelerix albiventris). The patient was referred to Seoul National University, Veterinary Medical Teaching Hospital after 5 days history of left eye exophthalmos and corneal trauma. He had enlarged upper and lower jaw at the left part of the face and endophthalmitis of the left eye. On radiographic examinations, loss of bone density at the left zygomatic arch and sun-burst type periosteal reaction of left mandible with decreased bone density was noted. Histologically, the neoplastic mass consisted of markedly invasive, cords of nests of squamous epithelial cells. Intercellular bridges and keratin pearl formation were also noted.

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PVA와 Algin의 블렌딩에 따른 특성과 토양분해 (Characteristics and Pot Test according to Blending of PVA/Algin)

  • 조형재;오세영;이기창;정덕채;김용렬;황성희
    • 한국응용과학기술학회지
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    • 제16권1호
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    • pp.25-31
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    • 1999
  • Algin is known as biodegradable natural polymer from marine plants. PVA/Algin blend films were prepared by solution blending method for the purpose of useful biodegradable polymer. Characteristics properties of PVA/Algin blend films such as DSC, Elongation, Tensile strength and Morphological change by SEM were determined. Tensile strength and Elongation were rapidly reduced as increasing the blend ratio of Algin. PVA/Algin blend films were found that phase separation was occured as more than 25wt% increasing the blend ratio of Algin. Blend films were observed to be less partially compatibility than 10wt% increasing the blend ratio of Algin by DSC, mechanical properties and SEM. Also, PVA/Algin blend films at the laboratory soil test(Pot Test) were completely degraded in months with four kinds of soils by microorganisms.

Metamorphic HEMT에서 low-k Benzocyclobutene (BCB)를 이용한 표면 passivation 비교 연구 (Comparative study of surface passivation for Metamorphic HEMT using low-k Benzocyclobutene(BCB))

  • 백용현;오정훈;한민;최석규;이복형;이성대;이진구
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2006년도 하계종합학술대회
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    • pp.471-472
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    • 2006
  • The passivation technology is very important, because this technology can protect a device against the influence of ambient environment, and prevent the performance reduction. In this paper, we fabricated the $0.1{\mu}m\;{\Gamma}$-gate InAlAs/InGaAs metamorphic high electron mobility transistors (MHEMTs) on GaAs substrates using the low-k benzocyclobutene (BCB) and $Si_3N_4$ as a passivation and we performed the comparisons of characteristics of the MHEMTs. After passivation, the DC and RF measurement results were decreased either the conventional Si3N4 or BCB layers. The decrement of the BCB passivation was smaller than the $Si_3N_4$ passivation.

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Discovery of Novel and Potent Cdc25 Phosphatase Inhibitors Based on the Structure-Based De Novo Design

  • Park, Hwang-Seo;Jung, Suk-Kyeong;Bahn, Young-Jae;Jeong, Dae-Gwin;Ryu, Seong-Eon;Kim, Seung-Jun
    • Bulletin of the Korean Chemical Society
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    • 제30권6호
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    • pp.1313-1316
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    • 2009
  • Cdc25 phosphatases have been considered as attractive drug targets for anticancer therapy due to the correlation of their overexpression with a wide variety of cancers. We have been able to identify five novel Cdc25 phosphatase inhibitors with micromolar activity by means of a structure-based de novo design method with a known inhibitor scaffold. Because the newly discovered inhibitors are structurally diverse and have desirable physicochemical properties as a drug candidate, they deserve further investigation as anticancer drugs. The differences in binding modes of the identified inhibitors in the active sites of Cdc25A and B are addressed in detail.

한우 결핵의 신속 감별진단을 위한 등온증폭법 개발 (Development of loop-mediated isothermal amplification method for the rapid and sensitive detection of bovine tuberculosis in Korea native cattle)

  • 황은숙;이태욱;정대영;조호성
    • 한국동물위생학회지
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    • 제34권4호
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    • pp.333-339
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    • 2011
  • Loop-mediated isothermal amplification (LAMP) was developed to detect Mycobacterium tuberculosis complex (MTC) and non-tuberculous mycobacterium (NTM) genomic DNA in blood samples of Korea native cattle. A set of four primers, two outer and two inner, were designed from M. bovis and M. avium genomic DNA targeting the IS6110 and 16S rRNA gene, respectively. Based on 85 Intradermal Tuberculin Test (ITT) positive blood sample and using conventional PCR and LAMP, the agreement quotient (kappa), which measures agreement beyond chance were 0.93 (conventional PCR) and 0.97 (LAMP), respectively. The detection limit of the LAMP method was $2.0{\times}10^2$ copy/ml M. bovis and M. avium cells, compared to $2.0{\times}10^3$ copy/ml M. bovis and M. avium cells for conventional PCR. These results suggest that the LAMP is a powerful tool for rapid, sensitive, and practical detection of MTC and NTM in blood samples of Korea native cattle.

Antegrade Continence Enema를 이용한 소아 배변장애의 치료 (The Results of Treating Fecal Incontinence with Antegrade Continence Enema (ACE))

  • 한성식;김기홍;김대연;정성은;이성철;박귀원;김우기
    • Advances in pediatric surgery
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    • 제6권1호
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    • pp.27-31
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    • 2000
  • Fecal incontinence is not rare in children who have been operated upon for anorectal malformation, Hirschsprung's disease, and meningomyelocele. Incontinence can negatively impact on the emotional and social development of these children. Antegrade continence enema (ACE) was utilized in 9 patients with meningomyelocele from January 1998 to June 1999. Cleanliness and post-operative complications were evaluated. Three operative techniques were employed; reversed appendicocecostomy, in situ appendicostomy and neoappendicostomy with cecal flap. All of the patients achieved complete fecal cleanliness. Four patients had post-operative complications; two with stoma leakage, one with abdominal pain on irrigation and one with stoma stenosis. The leakage was minimal and the pain on irrigation improved spontaneously. The stoma stenosis required revision 6th month postoperatively. The ACE has been shown to be safe and highly effective.

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WDHA증후군을 동반한 신경절모세포종 (Ganglioneuroblastoma with WDHA Syndrome)

  • 김대연;김기홍;김상범;정성은;이성철;박귀원;김우기
    • Advances in pediatric surgery
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    • 제6권1호
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    • pp.56-59
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    • 2000
  • The WDHA syndrome characterized by watery diarrhea, hypokalemia, and achlorhydria (WDHA syndrome) is rare, and with neurogenic tumors. A 20-month-old girl presenting with symptoms of WDHA syndrome was transferred to our hospital. She had a ganglioneuroblastoma of the adrenal gland. The serum level of VIP was elevated. After complete excision of the tumor, all symptoms related to the WDHA syndrome were relieved and serum VIP level dropped to normal. The postoperative course was uneventful. The patient was treated with postoperative chemotherapy and radiation therapy. There was no evidence of disease 33 months after operation.

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Thrombotic Complications during Interventional Lung Assist: Case Series

  • Kim, Eun Jung;Cho, Woo Hyun;Ahn, Eun Young;Ryu, Dae Gon;Lee, Seung Eun;Jeon, Doo Soo;Kim, Yun Seong;Son, Bong Soo;Kim, Do Hyung
    • Tuberculosis and Respiratory Diseases
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    • 제78권1호
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    • pp.18-22
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    • 2015
  • Interventional lung assist (iLA) effectively reduces $CO_2$ retention and allows protective ventilation in cases of life-threatening hypercapnia. Despite the clinical efficacy of iLA, there are a few major limitations associated with the use of this approach, such as bleeding, thrombosis, and catheter-related limb ischemia. We presented two cases in which thrombotic complications developed during iLA. We demonstrated the two possible causes of thrombotic complications during iLA; stasis due to low blood flow and inadequate anticoagulation.

동근형 무전극 형광램프의 전자계 특성 (A study on Electromagnetic Propertie of the Ring-shaped electrodeless fluorescent lamp)

  • 이성진;김남군;박노준;이종찬;정영일;박대희
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 추계학술대회 논문집 전기물성,응용부문
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    • pp.220-221
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    • 2006
  • In recent, there have been several developments in lamp technology that promise savings in electrical power consumption and improved Quality of the lighting space. Above all, the advantages of ring-shaped electrodeless fluorescent lamp are the removal of internal electrodes and heating filaments that are a light-limiting factor of conventional fluorescent lamps. Therefore, the life time of ring-shaped electrodeless fluorescent lamps is substantially higher than that of conventional fluorescent lamps last up to 60,000 hours, There are intended as a highly efficient replacement for the incandescent reflector lamp in many applications. In this paper, maxwell 3D finite element analysis program (Ansoft) was used to obtain electromagnetic properties associated with the coil and nearby structures. The electromagnetic emitting properties were presented by 3D simulation software operated at 250 kHz and some specific conditions. In addition, the optical characteristics of ring-shaped electrodeless fluorescent lamp were measured including light flux, efficiency and color temperature for each case.

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