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田世圭,宣明勳 釜山水産大學校 1969 釜山水産大學 硏究報告 Vol.9 No.1
1. 1968年 3月 14日과 1968년 3월 16日의 巨濟郡 長承浦 아양리에서 發生한 疾病의 原因을 밝히기 위하여 같은 地域의 패류를 調査한 結果 同 地區에 棲息하는 바지락의 肝에 蓄積된 venerupin毒素에 의한 食中毒인 것을 알게되었다. 2. 巨濟郡 長承浦 아양리의 바지락 肝混獨液은 强한 peroxidase 反應을 나타냈고 같은 地區의 홍합, 대수리, 참고동 등도 毒性反應을 나타냈다. 3. Venerupin 毒素는 熱에 依하여 弱化되며 加熱時間에 正比例하여 減독되었다. 4. 바지락 肝 抽出原液을 mouse의 腹腔에 0.5㎖, 0.25㎖ 注射한 結果 23時間부터 60時間 사이에 모두 죽었다. 5. 바지락 肝 抽出原液을 40培, 80培,100培 희석한 것을 0.2㎖ 주사한 mouse는 30日이 지나도 죽지 않았다. 6. 죽은 mouse를 解剖하여보니 全部가 같은 病變을 일으켰으며, 肝의 腫張과 赤色變化와 肺의 充血이 甚하고, 粘膜 出血을 觀察 할 수 있었다. 7. 죽은 mouse의 모든 肝은 病變을 일으키고 있으며, 肝組織 全般에 걸쳐 血液이 充滿되고, 甚한 肝細胞의 壞死, 變性이 나타났고, 細胞質은 없어지고 核物質만이 集結된 變化도 볼수 있었다. 8. Mouse가 죽은 原因은 venerupin에 依한 肝細胞의 壞死, 變性때문이라 할 수 있다. 9. 3月20日의 아양리 海水中에는 Rhizosolenia sp.가 약 50% 發生되고 있었다. 10. 有毒性 바지락을 循環水槽에서 飼育하면 減毒되는 것을 알수 있다. The present study was conducted to find out the causes of clam poison which resulted in several deaths of local people in A-Yang-Ri, Koje Do, Korea on March 14 and 16, 1969. The results of the investigation indicate that the poison was caused by venerupin which is concentrated in the liver tissue of the clam, Tapes philippinarum. Mixed liver solution of the clam showed very strong peroxidase reaction, whereas those of other mollusks in the region, i.e., Mytilus edulis, Tegula lischkei and Maneinella clavigera, showed no indication of toxic reactions. The toxicity of venerupin becomes weakened by heating, and decreases proportionally with the length of boiling time. When 0.25 and 0.5 ml of the extracted solution of the clam's liver was injected into the abdominal cavity of mice, death of the animals began 23 after the injection and all of them were dead within 60 hours. The animals lived for 30 days after the injection, showing no sign fo discomfort when each is injected with 0.2 ml of the liver extract solution diluted 40, 80, and 100 times respectively. All the dead animals with the injection of venerupin showed almost the same symptoms, that is, swelling of liver, severe hyperemia of lungs and mucous bleeding. The entire liver tissue of the dead animals showed severe hyperemia, destruction of the liver cells, degeneration of the cytoplasm, and aggregation of the nuclei in the tissue. The cause of the animals' death is attributable to the destruction of liver cells by the poisonous effect of venerupin, The planktonic organisms collected from the coastal water of A-Yang-Ri were composed of approximately 50% of Rhizosolenia sp. Toxicity of the poisonous clams was reduced when reared in circulating aquaria with running sea water.
L1₂ 기 Al-Ti-Cr 합금의 상안정성에 미치는 Zr 첨가효과
천동현,이재경,오명훈,위당문 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.1
Interest in the L1₂ phase in the Al-Ti-Cr system has increased with respect to the demand for light weight materials at elevated temperature because of its enhanced mechanical properties that arise through the substitution of Cr for Al in Al₃Ti intermetallic compounds. Additionally, recent work has indicated that the application of L1₂- based alloys was extended to oxidation resistance coating materials for γ-based TiAl alloy because the L12 phase could form a protective Al₂O₃ scale under oxidizing environments. However, L1₂ phase decomposes partially or completely to a more brittle phase when exposed to temperatures in the range of 800~1000℃, resulting a serious degradation of the cracking resistance in L1₂-based alloys. In this study, Zr was substituted for Ti in Al-21Ti-23Cr alloys to improve the phase stability around 800℃. As a result of Zr addition in L12-based Al-Ti-Cr alloys, the fraction of L12 phase decomposition at 800℃ was decreased. Furthermore, temperature range, in which L1₂ phase was decomposed to other brittle phase, was shrunken when Zr was added in the Al-Ti-Cr alloys. These phenomena resulted from the fact that the L1₂ phase field was less shifted in the direction of the Al-rich corner at 800oC in the Al-Ti-Cr system and that atomic diffusion for the L1₂ phase decomposition was reduced. Therefore, the addition of Zr is required to increase the possibility for potential usage of L1₂-based Al-Ti-Cr alloys at elevated temperatures around 800℃ because of the improvement of phase stability.
이훈재,류명춘,오주환 경운대학교 산업기술연구소 1998 産業技術硏究論文誌 Vol.1 No.1(A)
In this paper we propose a secure T1-rate digital image conference system which consists a stream cipher of 7-bit real adder with 2 bit carrys and a fast and stable 2-step full-duplex synchronization. And we analyze the cipher algorithm and the synchronization performance of the system.
류명춘,이훈재,서동주 경운대학교 산업기술연구소 1998 産業技術硏究論文誌 Vol.1 No.1(A)
The number of databases maintained in the world is increasing rapidly. Many of these databases are huge and are therefore very difficult to manually analyze. To make it feasible to analyze databases, researchers have been developing tools for knowledge discovery in databases. This paper proposed the knowledge discovery system based on rule-based system to efficiently discover knowledge in databases.
LILI-128 암호의 고속화 방안 및 FPGA 구현에 관한 연구
이훈재,박영민,류명춘 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(A)
Because LILI-128 cipher is a clock-controlled keystream generator, it makes the keystream data degrade in a speed for clock-synchronized hardware logic design: The clock-controlled LFSR_d in LILI-128 cipher requires 1∼4 times higher system clock, that is the reason why the system throughput in data rate is lower if the same clock were selected and that is the structural problem in principle. In this paper, we propose the solution to 4-bit parallel LFSR_d that each register bit has four variable data routines to feedback or shift in LFSR_d. Finally, we simulates the timing of the design on Max+plus Ⅱ of ALTERA Co., implements the logic circuit to the FPGA device (EPF10K20RC240-3), and analyses the stability on throughput to 50 Mbps rate (we choose a higher speed than T3 rate, 45 Mbps and the maximum delay routine in our design is below 20ns) under the 50㎒ system clock. For example, Lucent technologies ASIC can achieve the throughput about 500 Mbps if the maximum delay routine were 1.8㎱ at a 0.13 ㎛ semiconductor.