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조성환,손화영,김혜성,최종윤,류시윤,박배근,윤원기,홍성혁,김덕환 충남대학교 수의과대학 동물의과학연구소 2002 動物醫科學硏究誌 Vol.10 No.-
Pilomatricoma was histopathologically diagnosed in a 2.5-year-old male Alaskan malamute. The patient was referred to Chungnam National University, Veterinary Medical Teaching Hospital with solitary, firm and well-circumscribed mass at shoulder. Grossly, the mass was dome shaped to tumor like and 10 x 8 x 5㎝ in size. Some lesions had gritty or bony consistency and was chalky when sectioned Histopathologic feature included mumerous clusters of tightly arranged, basaloid cells with evenly distributed chromatin and ghost cells were characterized by a central unstained zone. The ghost cells often become calcified and osseous metaplasia was also present.
오옥신의 종류 및 농도가 가이즈까 향나무의 삽목 발근에 미치는 영향
윤재길,송시호,박상현 진주산업대학교 농업기술연구소 2001 農業技術硏究所報 Vol.14 No.-
Effects of auxin and Rootone on the rooting of Juniperus chinensis var. Kaizuka cutting were investigated to improve propagation efficiency. When Rootone treated, rooting was 100% compared with the control, 33%. IBA 200ppm 1h and NAA 100ppm 12h improved evidently rooting, 93% and 90%, respectively. Root fresh weight increased up to 131mg by Rootone. NAA 200ppm 12h, NAA 500ppm 1h, and IBA 200ppm 1h were also very effective to root fresh weight more than 110mg. Shoot growth(height, fresh weight and dry weight) did not increase largely, but increased a little. Dipping into high concentration auxin solution for 1min increased rooting rate and root fresh weight, but was less effective than low concentration treatment. Shoot growth did not increase largely, but increased a little. These results indicate that Rootone and IBA 200ppm 1h are most effective for improvement of rooting in Juniperus chinensis var. Kaizuka cutting.
조은상,손화영,류시윤,조성환 忠南大學校 獸醫科大學 動物醫科學硏究所 2005 動物醫科學硏究誌 Vol.13 No.-
A dog which referred to animal hospital with chief compliment of left hindlimb lameness, was died under the examination, so we observed this case histopathologically. Clinical signs were hindlimb lameness, dyspnea, exercise intolerance, lethargy, hemoptysis, anorexia, and coughing. The gross findings were 5cm in diameters nodule in the caudal abdomen, swelling and milky nodules of the lung, swelling and gray-white patches of the liver, ovarian cyst and dirofilariasis in the heart. In histopathologic examination, metastatic tumors and microfilaria were observed in the lung, liver, spleen, adrenal gland and kidney.
돼지생식기호흡기 증후군(PRRS) 바이러스 감염시킨 돼지 기관의 병리학적 관찰
조성환,김현수,윤원기,전무형,류시윤,박배근,손화영,김무강 충남대학교 수의과대학 동물의과학연구소 1996 動物醫科學硏究誌 Vol.4 No.-
The porcine reproductive and respiratory syndrome virus was inoculated into swine tracheal organ culture. The ballooning degeneration of the tracheal ciliated epithelium and a decrease of ciliary activity from the tracheal organs infected with PRRS virus were observed one day post-infection(PI). Tracheal epithelium showed degeneration and focal necrosis 2 days PI. Epithelial necrosis and loss of cilia and epithelial cells became more severe 3 and 4 days PI. An entire loss of cilia and epithelial cells were recognized 4 days PI, however, control tracheal organs were normal during the period of the experiment except a little decrease of ciliary activities with time..
朴祥鎭,朴英錫,鄭時潤,鄭泰周 명지대학교 공학기술연구소 1992 공학기술연구소 논문집 Vol.7 No.-
Generally, an orthotropic steel plate deck bridge is called an "orthotropic bridge". The orthotropic bridge deck consists of thin steel plate stiffened longitudinal ribs at right angles to the floor beams. As the rigidities of the ribs and floor beams are generally of unequal magnitude, elastic behaviour is different in each of these two main directions. Because ribs and floor beams are orthogonal and because their elastic properties are different, the system became known as orthogonal-anisotropic, or, briefly, orthotropic. Mathematically, this elastic property is described by Hook's law. Further, we assume that it is homogeneous. Of all the methods considered in deck analysis, the most practical is that of Pelican and Esslinger. In this method, the deck system is a continuous orthotropic plate, rigidly supported by its main girders and elastically supported by the floor beam. The design of steel plate decks with open or closed ribs is made in two computation steps. In the first step, it is assumed that the floor beams are infinitely rigid. In the second step, the effects of the floor beam elasticity are considered. M"uller-Breslau Theory and 3 moment-equation are used to analyze the behaviour of the continuous beam on elastic and rigid supports. Many procedure are programmed in order to accomplish the economic design and accuracy.
최종윤,손화영,전무형,조성환,김혜성,류시윤,박배근,이영원,윤원기 충남대학교 수의과대학 동물의과학연구소 2001 動物醫科學硏究誌 Vol.9 No.-
Two farmed young ostrich chicks were applied to pathology laboratory at Chungnam National University. Grossly, one ostrich showed rotated tibiotarsus, the other showed rolled toes. Case 1 ostrich was hypertrophy of fibualis longus and tibial cranialis tendon and gastrocnemius tendon in crus, inflammation of flexor digitorum longus. In histopathological views, myocytes of fiburalis longus were showed hypertrophy and hyperplasia. It is not found any specific feature in X-ray of the case 2 ostrich. Limb deformities were detected frequently in farmed ostrich chicks in 2- to 3 weeks old. Limb deformities were an important cause of mortality in farmed ostrich chicks during the first 10weeks after hatch. Cause of limb deformities were considered a nutrition problem.
조성환,류시윤,김현수,박배근,김덕환,손화영,윤원기,신창호 충남대학교 수의과대학 동물의과학연구소 1999 動物醫科學硏究誌 Vol.7 No.-
Pathological observations were examined after abdominal inoculation in 7∼8㎝ sized flounder (Paralichthys olivaceus) with 1X10^7 cfu/㎖ of Streptococcus faecalis. The infected flounder were clinically observed and weighed a fish body at 0, 5, 10, 15, 20, 25, 30 days post inoculation. In infected group, mortality were 70% and feed efficiency were 7.2%. In non-infected group, mortality were 10% and feed efficiency were 18.2%. Macroscopically, the significant lesions were characterized by protrusions and opacity of the eyes and ulcer of the caudal pecuncle. Histopathologically, the lesions were observed a degeneration. necrosis and inflammatory cells in muscle of the caudal peduncle and a degeneration and necrosis of the rod cells and detached retina from the black pigmented layer