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전체 선택해제
총 30건 검색
본문검색 결과만 보기
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Fabrication of Polyurethane-sheet Acoustic Windows and Their Mechanical and Acoustic Properties in Water
조미숙, 최재석, 이수정, 윤석왕, 구자춘, 이영관, Cho. Mi-Suk, Choi. Chae-Seok, Lee. So-Jung, Yoon. Suk-Wang, Koo. Ja-Chun, Lee. Young-Kwan 한국고분자학회 폴리머 4 Pages
한국고분자학회 폴리머 2010, Vol.34 No.2 104-107 (4 pages)
가교제인 trimethylol propane(TMP)의 함량변화에 따라 다양한 폴리우레탄(PU) 평판을 제작하였다. DMA 측정을 통하여 TMP 함량에 따라서 PU의 $T_g$는 34.8 $^{circ}C$에서 49.9 $^{circ}C$로 증가를 확인하였다. TMP의 함량이 4%에서 12%까지 증가함에 따라 탄성률은 322 MPa에서 423 MPa로 증가하였고, 인장강도는 10.6 MPa에서 14.8 MPa로 다소 증가하였으며, 신율은 62.8%에서 49%로 감소하였다. 음향특성의 경우, TMP의 함량이 증가함에 따라 가교 정도가 높아지며, 음속은 증가하였으나 음향감쇠계수는 감소하였다. 제작한 PU... -
Echocardiographic assessment of coronary artery flow in normal canines and model dogs with myocardial infarction
Nohwon Park, Jaehwan Kim, Miyoung Lee, Soyun Lee, Sunhye Song, Seungjun Lee, Soyoung Kim, Yangwoo Park, Kidong Eom* 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 1호 17 149-155 (7 pages)
This study was conducted to evaluate the usefulness of coronary arterial profiles from normal dogs (11 animals) and canines (six dogs) with experimental myocardial infarction (MI) induced by ligation of the left coronary artery (LCA). Blood velocity of the LCA and right coronary artery (RCA) were evaluated following transthoracic pulsed-wave Doppler echocardiography. The LCA was observed as an infundibular shape, located adjacent to the sinus of Valsalva. The RCA appeared as a tubular structure... -
Contrast-enhanced ultrasound analysis of renal perfusion in normal micropigs
Kangjae Yi, Seoyeoun Ji, Junyoung Kim, Junghee Yoon, Mincheol Choi* 대한수의학회 Journal of Veterinary Science 4 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 3호 13 311-314 (4 pages)
Contrast-enhanced ultrasound is one of method for evaluating renal perfusion. The purpose of this project was to assess perfusion patterns and dynamics in normal micropig kidney using ultrasonographic contrast media. Eight young healthy micropigs were included in this study. Micropigs were anesthetized with propofol and received an intravenous bolus of microbubble contrast media through an ear vein. Time/mean pixel value (MPV) curves were generated for selected regions in the right renal cortex... -
Transcranial Doppler ultrasound analysis of resistive index in rostral and caudal cerebral arteries in dogs
Minho Seo, Hojung Choi, Kichang Lee, Mincheol Choi, Junghee Yoon 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2005, 제 6권 제 1호 9 61-66 (6 pages)
normal dogs, respectively. There was no significant difference of RI between male and female; between fontanelle window and temporal window. Reproducibility of RI measurements between intraobserver and interobserver were relatively high. The RI of RCA and CCA were significantly increased 15 minutes after mannitol administration (p < 0.01) and returned to baseline values by 30 minutes, but it did not significantly change after furosemide and saline administration. The results suggest that TCD is... -
Application of pulsed Doppler ultrasound for the evaluation of small intestinal motility in dogs
Yong-joo An, Heechun Lee, Dongwoo Chang, Youngwon Lee, Jai-ki Sung, Mincheol Choi, Junghee Yoon 대한수의학회 Journal of Veterinary Science 4 Pages
대한수의학회 Journal of Veterinary Science 2001, 제 2권 제 1호 12 71-74 (4 pages)
The purpose of this study was to verify whether small intestinal peristalsis could be observed and quantitatively assessed using pulsed-Doppler ultrasound. Pulsed-Doppler ultrasound was used to evaluate small intestinal peristalsis after a meal in ten normal dogs and ten sedated dogs. The small intestinal peristalses were measured 0, 1, 3, 6, 9, 12, and 24 hours after a 24-hour fast and after feeding. The number of small intestinal peristalsis were 0.133/min, 0.100/min, 0.033/min, 0.167/min,... -
Correlation Between Electrical Activity of Type I Neuron and c-Fos Expression in the Medial Vestibular Nuclei Following Unilateral Labyrinthectomy in Rats
ByungRimPark, NamYongDoh, MinSunKim, SangWooChun, MoonYoungLee, SungHoLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.5 5 505-513 (9 pages)
To search the correlations between electrical activity and c-Fos expression in the process of vestibular compensation, we examined the changes of those two parameters in the medial vestibular nuclei (MVN) of unilaterally labyrinthectomized (ULX) rats. Spontaneous nystagmus with fast component toward the intact side disappeared gradually within 48 hours. Fourty eight hours after ULX, directional preponderance of the eye movement induced by sinusoidal rotation of the whole body which represents... -
소아청소년 정신의학에서의 동물모델
이서경, 반건호 대한신경정신의학회 신경정신의학 10 Pages
대한신경정신의학회 신경정신의학 2007, 제 46권 제 4호 2 285-294 (10 pages)
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소음성 난청의 업무상 질병 인정기준 고찰
김규상 한국청각언어재활학회 Audiology and Speech Research 7 Pages
한국청각언어재활학회 Audiology and Speech Research 2017, 제 13권 제 4호 1 265-271 (7 pages)
소음성 난청은 전형적으로 양측성 난청으로, 초기에는 3, 4, 6 kHz의 청력역치에서 노치(notch), 즉 청력이 급격히 나빠져 V자형 순음청력도로 나타나며 8 kHz 청력은 상대적으로 양호 하다. 반면, 노인성 난청은 전형적인 노치가 없다. 노인성 난청이 없는 소음성 난청은 저주파역에서는 40 dB HL 이하의 경도 난 청을 보이며, 고주파역에서 심한 난청 소견을 보인다. 기간 경과 에 따라 소음성 난청의 진행은 느려지고 노인성 난청의 진행은 가속화된다. 매일 85 dB (A) 이상의 소음에 노출될 경우 노출 강 도가 클수록 소음성 난청의...
