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Context: Groove pancreatitis is a rare form of chronic pancreatitis localized within the ‘groove' between the pancreatic head, duodenum and common bile duct. Case report: A 56-year-old man was admitted to our hospital with epigastric pain and nausea. Enhanced abdominal computed tomography (CT) revealed swelling of the pancreatic head and focal wall edema of the second portion of the duodenum with a cystic lesion around the pancreaticoduodenal groove. Peripancreatic fluid collection was also seen. Upper gastrointestinal endoscopy revealed multiple ulcer scars with pseudodiverticulum and contracting folds at bulb and bulging contour at 2nd portion of duodenum. Endoscopic ultrasound (EUS) showed an anechoic round lesion interrupting 3rd, 4th and subserosa of the duodenal wall at level of uncinate process. These findings appeared consistent with the diagnosis of groove pancreatitis. The patient was treated with conservative medical management for 1week and symptoms subsided. Imaging problems described above completely disappeared on following abdominal CT after four months. Conclusions: Discrimination of groove pancreatitis from pancreatic head cancer can often be difficult and is confirmed by surgery such as pancreaticoduodenectomy. Therefore, imaging examinations is very important to diagnose groove pancreatitis. EUS is helpful modality to differentiate groove pancreatitis from pancreatic head cancer.
In this study low voltage Plasma Electrolytic Oxidation (PEO) was utilized to eliminate high voltage PEO drawbacks such as high cost, dimensional deformation and porosity. Low voltage PEO produces a thin coating which causes low corrosion resistance. In order to solve such problem, 0.1~0.6M pyrophosphates were added in a bath containing 1.4M NaOH, and 0.35M Na₂SiO₃. 70 V PEO was conducted at 25℃ for 3 minutes. Chemical composition, morphology and corrosion resistance of the anodized coating were analyzed. The anodized film was composed of MgO, Mg₂SiO₄, and Mg₂O7P₂. The morphology of film showed appropriately dense structure and low porosity in the anodized layers. It is found that low voltage Plasma Electrolytic Oxidation in cooperation with phosphating treatment can provide a good corrosion protection for the AZ31B magnesium alloy.
Jae,Hoon,Bahn,A,Yeon,Kim,장상호,Byung,Ryong,Lee,Jee-Yin,Ahn,Hye,Mee,Joo,강태천,원무호,Hyeok,Yil,Kwon,Jung,Hoon,Kang,Oh-Shin,Kwon,Hyong,Bai,Kim,조성우,Kil,Soo,Lee,Jinseu,Park,최수영 한국분자세포생물학회 2002 Molecules and cells Vol.13 No.1
Five monoclonal antibodies that recognize porcine brain myo-inositol monophosphate phosphatase (IMPase) have been selected and designated as mAb IMPP 9, IMPP 10, IMPP 11, IMPP 15, and IMPP 17. These antibodies recognize different epitopes of the enzyme and one of these inhibited the enzyme activity. When the total proteins of the porcine brain homogenate separated by SDS-PAGE were probed with monoclonal antibodies, a single reactive protein band of 29 kDa, co-migrating with the purified porcine brain IMPase, was detected. Using the anti-IMPase antibodies as probes, the cross reactivities of the brain IMPase from human and other mammalian tissues, as well as from avian sources, were investigated. Among the human and animal tissues tested, the immunoreactive bands on Western blots appeared to have the same molecular mass of 29 kDa. In addition, there was IMPase immunoreactivity in the various neuronal populations in the rat brain. These results indicate that mammalian brains contain only one major type of immunologically similar IMPase, although some properties of the enzymes that were previously reported differ from each another. The first demonstration of the IMPase localization in the brain may also provide useful data for future investigations on the function of this enzyme in relation to various neurological diseases.
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A case of tuberculosis is reported in an eight-year-old, male, elk (Cervus elaphus nelsoni). The elk showed severe coughing, respiratory distress, abdominal breathing, anorexia, and severe progressive emaciation in the elk farm. At necropsy, the elk appeared in poor body condition. Mild enlargement of retropharyngeal and submandibular lymph node was observed in the head. Diffuse fibrinous pleuritis and purple red lobar pneumonia were found in the thorax. Well demarcated numerous dark yellow discrete or confluent nodules from 0.3 to 2 cm in diameter were scattered in the whole lung. Bronchial and mediastinal lymph nodes were also enlarged. Histopathologically, lungs had typical classical tuberculous granulomas, multiple abscesses, and numerous macrophages and Langhans giant cells infiltration in alveolar lumen. In the lymph nodes, there were small clusters of necrosis and infiltration of numerous macrophages, epithelioid cells, and Langhans giant cells. With the acid-fast staining, numerous mycobacteria were revealed in the lung and lymph nodes. According to this study, there are differences of the histopathologic lesions and the numbers of acid-fast bacilli in the lesions between this elk and cattle. Mycobacterium bovis was confirmed as a causative agent in this elk using bacterial isolation, biochemical characteristics, and PCR technique. The isolate was negative for niacin test, nitrate reductase, and pyrazinamidase. This is a first report for bovine tuberculosis of farmed elk in Asia.
Cognitive radio (CR) features opportunistic access to spectrum when licensed users (LU) are not operating. To avoid interference to LU, cognitive users (CU) need to perform spectrum sensing. Because of local shadowing, fading, or limited sensing capability, it is suggested that multiple CUs cooperate to detect LU. In cooperative spectrum sensing, CUs should exchange their sensing data with minimum bandwidth and delay. In this paper, we introduce a novel method to efficiently report sensing data to the central node in an infrastructured OFDM-based CR network. All CUs simultaneously report their sensing data over unique and orthogonal signals on locally available subcarriers. By detecting the signals, the central node can determine subcarrier availability for each CU. Implementation challenges are identified and then their solutions are suggested. The proposed method is evaluated through simulation on a realistic channel model. The results show that the proposed method is feasible and efficient.
지금까지 Colletotrichum acutatum에 의해서 발생하는 고추(Capsicum spp.) 탄저병에 대한 안정적인 저항성 유전자원은 근연종인 Capsicum baccatum과 C. chinense에서만 동정되었다. C. baccatum var. PBC81의 탄저병 저항성을 C. annuum var. Matikas로 도입하기 위한 종간 교잡 및 배구제 방법이 사용되었다. 종간 교잡 F₁ 식물체들은 모두 완전한 화분 불임이어서 재배종인 ‘Matikas'를 화분친으로 사용하여 집중적인 여교잡을 수행한 결과 BC₁F₁ 집단을 육성할 수 있었다. 얻어진 수백 개의 BC₁F₁ 개체 중에서 탄저병 접종에 사용할 수 있는 다수의 과실이 달린 88개체만이 탄저병 저항성 유전 분석에 사용되었다. BC₁F₁ 집단의 저항성과 이병성의 분리비는 1:1 또는 3:1의 멘델식 분리비에 적합하지 않았으며, 집단의 빈도 분포는 저항성에서 이병성으로 연속분포를 보였다. 탄저병 저항성에 대한 광의의 유전력 측정을 위하여 selection differential(i)과 genetic gain(ΔG)을 이용하였고 공식 h²= ΔG/i에 의해 추정한 유전력은 약 0.61로 측정되었다. 이러한 결과는 C. baccatum var. PBC81의 탄저병 저항성이 몇 개의 유전자에 의해서 조절되는지는 알 수 없지만 다수의 유전자가 관여하는 양적유전형질이라는 것을 나타내는 것이다. Reliable genetic resources resistant to anthracnose, caused by Colletotrichum acutatum, in Capsicum have only been found in certain Capsicum species, e.g., Capsicum baccatum and C. chinense. Interspecific hybridization using embryo rescue was used to introgress anthracnose resistance from C. baccatum var. PBC81 into C. annuum var. Matikas. Because the interspecific hybrids were completely pollen-sterile, an interspecific BC₁F₁ as the first segregating population was raised through intensive backcrosses in which Matikas was used as the male parent. Among the hundreds of BC₁F₁ progeny, 88 plants setting many fruits were used to study inheritance of anthracnose resistance. The segregation of resistance to susceptibility in the BC₁F₁ population did not fit expected Mendelian ratios such as 1:1 or 3:1, and the frequency distribution of progenies varied continuously from resistant to susceptible. To estimate broad sense heritability of resistance, we used a real method of selection differential (i) and genetic gain (ΔG). According to the equation h²= ΔG/i, heritability was estimated as about 0.61. This result suggests that resistance of C. baccatum var. PBC81 can be controlled quantitatively, although we do not know yet how many genes are associated with the resistance.