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마이크로프로세서를 이용한 UTILITY CAR용 CONTROLLER 개발에 관한 연구
안호균,남징락,김태엽 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-
This paper describes the development of Controller for the Utility Car using Microprocessor. The Utility Car is composed of Controller, separately excited DC motor, battery and potbox. It is easier for a digitalized controller using microprocessor to append new function than an analogized controller. For sensorless current control, the driver is used the feedback voltage of battery.
최대 오차 벡터를 이용한 최적 공간 벡터 변조 기법에 관한 연구
안호균,김태엽,진승오,남징락 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-
This study proposes a optimized space vector modulation(SVM), which makes a good output current with low total harmonic distortion(THD) and introduces the concept of maximum error vector for new method. The performance of the new modulation technique using maximum error vector is shown by simulation and experiments.
태국 북부 산족(라후족, 아카족)의 체질인류학적 연구 : 머리형태 계측을 중심으로
정락희,한승호 韓國體育大學校 1998 論文集 Vol.21 No.-
Department of Human Anatomy, Korean National University of Physical Education Department of Anatomy, College of Medicine, The Catholic University of Koreal Cephalometric dimensions of head of the Lahu(male 35, female44) and Akha(male 84, female 86) in northern Tailand, whose customs are similar to the Koreans, were measured and the indices of each dimension were calculated to identify the anthropological characteristics of these tribes. The results were as follows : According to the cranial index, the heads of the Lahu and Akha tribes were classified to mixed type. The same results were found in the face and nose. In the case of cephalometric height indices, these tribes had acrocranic and hypsicranic types of skulls. The high skull patterns of the Lahu and Akha corresponded closely to the aptterns of the Koreans.
기저세포암 및 편평세포암에서 미세혈관밀도와 p53 단백 발현에 관한 연구
어수락,조규성,안호범,김대영,이삼용,조백현 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3
Basal cell carcinoma(BCC) and squamous cell carcinoma (SCC) are very prevalent neoplasms of the human skin. Ultraviolet radiation in sunlight is a well-established mutagen of the p53 gene and is one of basal cell carcinoma and squamous cell carcinoma. The newly-formed vascular network is important for neoplasms to grow beyond a size of about 1 ㎣. Recent reports have suggested the hypothesis that a mutant p53 protein is closely related with capillary density. Immumohistochemistry for p53 protein and CD34 was performed in 20 cases of BCCs and 14 SCCs to evaluated the relationship between p53 protein and capillary density. The results were as follows:1. The microvessels stained by CD34 were mainly located in the interface of tumor cells and stroma. 2. There was no difference in the microvessel density according to the histologic types and age of the patients, but a higher microvessel density was noted in male patients. 3. The aggressive BCCs and the less-differentiated SCCs showed higher p53 immunostaining. 4. The mean microvessel density of cases showing strong positive immunostaining of the p53 gene(54.73±17.75) was higher than that of others(39.75±18.30). These results suggested that p53 protein expression and microvessel density are not related to the histologic types and age of the patients, but that differentiation and biologic behavior such as the infiltrating property of tumors and the microvessel density are closely related to p53 protein expression.
Antiplatelet and Antithrombotic Effects of the Extract of Lindera obtusiloba Leaves
( Jun Ho Kim ),( Jaemin Lee ),( Soouk Kang ),( Hongsik Moon ),( Kyung Ho Chung ),( Kyoung Rak Kim ) 한국응용약물학회 2016 Biomolecules & Therapeutics(구 응용약물학회지) Vol.24 No.6
Lindera obtusiloba has been used in traditional herbal medicine for the treatment of blood stasis and inflammation. The leaves of Lindera obtusiloba have been reported to exhibit various physiological activities. However, there is little information available on their antiplatelet and antithrombotic activities. Thus, the present study aimed to evaluate the effect of Lindera obtusiloba leaf extract (LLE) on platelet activities, coagulation and thromboembolism. In a platelet aggregation study, LLE significantly inhibited various agonist-induced platelet aggregations in vitro and ex vivo. Furthermore, LLE significantly inhibited collagen-induced thromboxane A2 (TXA2) production in rat platelets. In addition, oral administration of LLE was protective in a mouse model of pulmonary thromboembolism induced by intravenous injection of a mixture of collagen and epinephrine. Interestingly, LLE did not significantly alter prothrombin time (PT) and activated partial thromboplastin time (aPTT). This study indicates that the antithrombotic effects of LLE might be due to its antiplatelet activities rather than anticoagulation. Taken together, these results suggest that LLE may be a candidate preventive and therapeutic agent in cardiovascular diseases associated with platelet hyperactivity.
머루 줄기와 자소자로부터 분리한 Resveratrol 올리고머와 Flavonoid의 항균효과
손락호(Rak Ho Son),진휘승(Hwi Seung Chin),함아름(Ahrom Ham),마응천(Woongchon Mar),남궁우(Kung-Woo Nam) 대한약학회 2010 약학회지 Vol.54 No.1
We studied the antimicrobial activities of five compounds isolated from the stems of Vitis coignetiae Pulliat and the seeds of Perilla frutescens (L.) Britton. Based on spectroscopic evidence, compounds 1 to 5 were characterized as resveratrol, ε-viniferin, ampelopsin E, apigenin, and luteolin, respectively. The antimicrobial activities against Gram-positive (Staphylococcus aureus) and -negative (Pseudomonas aeruginosa) bacteria and a fungus (Candida albicans) were investigated using the disc diffusion and broth dilution methods. C. albicans was not inhibited by the five compounds. Compounds 2 and 5 had significant anti-microbial activity against S. aureus, and the 50% inhibitory concentration (IC50) of compound 2 against S. aureus was 7.2 μM. Compounds 4 and 5 significantly inhibited P. aeruginosa and the minimum inhibitory concentration (MIC) of compounds 2 and 5 was 0.07 and 2.0 μM, respectively. Compounds 2, 4, and 5 had strong anti-microbial activity against S. aureus and P. aeruginosa.