• 한국초전도학회:학술대회논문집
• /
• v.12
• /
• pp.73-73
• /
• 2002

• Journal of the korean veterinary medical association
• /
• v.36 no.1
• /
• pp.56-60
• /
• 2000

Fecal materials and mesenteric lymphnodes from asymptomatic cattle confirmed to be infected with Johne's disease by ELISA were decontaminated with 1$\%$hexadecylpyridinium chloride (HPC) for 20$\~$24 hours at room temperature and ino

• Proceedings of the Optical Society of Korea Conference
• /
• 2006.07a
• /
• pp.321-322
• /
• 2006

• Journal of the korean veterinary medical association
• /
• v.44 no.11
• /
• pp.1046-1055
• /
• 2008

2008년 고병원성 조류인플루엔자의 발생으로 인해 양축 농가, 방역기관 관계자를 포함한 많은 국민들이 큰 시련을 겪었다. 다행히 이 질병이 초기에 근절되어 우리나라는 고병원성 조류인플루엔자 청정국임을 선포하게 되었다. 이 질병의 조기 근절에는 신속 정확한 진단이 기반이 되어 적절한 방역 대책이 수행되었기 때문으로 생각한다. 본고에서는 금년 고병원성 조류인플루엔자 발생과 관련되어 국립수의과학검역원 질병진단센터에서 수행한 의사환축 신고건, 병성감정 의뢰건, 역학조사 관련 시료 등에 대한 정밀검사 결과를 보고하고자 한다.

• Korean Journal of Veterinary Service
• /
• v.30 no.4
• /
• pp.539-544
• /
• 2007

A 7-year-old intact female Golden Retriever was presented for examination. The dog had large irregular subcutaneous masses in the abdomen which were ruptured or encapsulated. Those were removed surgically. Histopathologically, the masses consisted of spindle cells that often formed distinct whorls around a central capillary. Immuno-histochemical analysis revealed that the neoplastic cells were strong diffuse cyto-plasmic immunolabelling for vimentin and focal immunoreactivity for smooth muscle actin, whereas not immunoreactive for cytokeratin, desmin, von Willebrand factor, glial fibrillary acidic protein, or S-100. The neoplastic cells ultrastructurally had processes attached by desmosome-like structures, swollen mitochondria and dilated rough endoplasmic reticulum. Based on the above results, this case was diagnosed as a canine hemangiopericytoma in the abdominal subcutis of a Golden Retriever.

• Progress in Superconductivity and Cryogenics
• /
• v.5 no.1
• /
• pp.66-70
• /
• 2003

In a HTS transformer, the perpendicular component of magnetic flux density ($B_r$) applied to HTS tapes of pancake windings becomes larger than that of solenoid winding, thereby decreasing the critical current in the HTS tapes. This paper introduces several methods to reduce $B_r$ applied to the HTS tapes in the transformer with double pancake windings by changing winding arrangements and the relative permeability of flux diverters. We have conducted a winding design for a single-phase 1MVA 22.9kV/6.6kV HTS transformer. We observed a change of $B_r$ due to a variation of gap-length between the high voltage windings and the low voltage windings, reciprocal arrangement and an increase of the number of the high voltage pancake. We also observed a change of Br on the HTS tapes due to variation of the relative permeability of flux diverters placed between the high voltage winding and the low voltage winding. Finally, we have designed a 1MVA 22.9kV/6.6kV HTS transformer winding using suggested methods and calculated transformer parameters by the 3D finite element method.

• Progress in Superconductivity and Cryogenics
• /
• v.5 no.1
• /
• pp.48-51
• /
• 2003

A 1 MVA transformer with BSCCO-2223 high Tc superconducting (HTS) tapes was designed. The rated voltages of each sides of the transformer are 22.0 kV and 6.6 kV respectively. Double pancake HTS windings, which have advantages of insulations and distribution of high voltage, were adopted. Four HTS tapes were wound in parallel fer the windings of low voltage side. Each winding was composed of several double pancake windings made of four parallel conductors were transposed in order to distribute the currents equally in each conductor. A core of the transformer was designed as a shell type core made of laminated silicon steel plate and the core is separated with the windings by a cryostat with a room temperature bore. The operating temperature of HTS windings will be 65K with liquid nitrogen, and a cooling system using a cryocooler was proposed and designed conceptually. This HTS transformer is going to be manufactured in near future based on the design parameters presented in this paper.

• Korean Journal of Veterinary Service
• /
• v.30 no.4
• /
• pp.533-538
• /
• 2007

A 16-year-old female mixed dog was submitted for examination at the pathology division of national veterinary research and quarantine service (NVRQS). Grossly, white or grayish spherical, multinodular, firm to friable masses were present in the tibiofibula to the pharenge area of the right limb, and dysphagia, breathing difficulties and tachypnea were shown. Various-sized white or grayish black masses were scattered in lungs and diaphragm and one mass was observed in the trachea and in the jejunum, respectively. Histopathologically, the neoplastic cells were composed of polygonal or spindle shaped cells with various sized round to oval nuclei and abundant cytoplasm. These cells formed lobules or nests separated by fine connective tissue and contained little amount of melanin pigments. Melanin pigments were stained dark gray or black with Fontana-Masson method. Melanosomes were also ultrastructurally demonstrable by electron microscopy. Based on above results, the present case was diagnosed as canine malignant melanoma originating from the lower limb and digit.

• Korean Journal of Veterinary Research
• /
• v.47 no.2
• /
• pp.163-167
• /
• 2007

Bovine viral diarrhea (BVD) is very important disease in cattle industry with a worldwide distribution. Detection and elimination of persistently infected calves with bovine viral diarrhea virus (BVDV) was valuable strategy for BVD eradication because those calves were main source for transmission. We surveyed persistent infection with BVDV by reverse transcription polymerase chain reaction (RT-PCR) and immunohistochemistry (IHC) using whole blood and skin. Five hundred thirty nine Korean native calves were tested. Four calves (0.7%) were positive for BVDV antigen for both tests. Those calves remained positive for follow-up by RT-PCR and IHC. Therefore they were identified as persistently infected with BVDV. We confirmed that immunohistochemistry using skin biopsy samples was very useful tool to detect persistently infected calves with BVDV. As far as we know, this would be first report on persistent infection with BVDV in Korea.

• Journal of Veterinary Clinics
• /
• v.27 no.4
• /
• pp.494-496
• /
• 2010

Chordoma was described in the tail masses of two ferrets. Tail masses were surgically removed and submitted for diagnosis. On histopathology, the masses from both ferrets were almost similar each other. The mass was well-demarcated and composed of lobules or sheets of neoplastic cells. The neoplastic cells were round to polygonal with distinct cell border and contained marginally located round nucleus. The cytoplasm of neoplastic cells was highly vacuolated. Immunohistochemically, the neoplastic cells were positive to cytokerain, vimentin, and S-100. Based on these results, both cases were diagnosed as chordoma in ferrets. Recurrence was not noted since surgery.