• Transactions of the Korean Society of Mechanical Engineers A
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• v.39 no.11
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• pp.1099-1103
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• 2015

Recently, there have been several studies on the inspiration and application of optimized natural structures. One study introduced a new adhesion method that was inspired by the feet of geckos because of their superior features such as high adhesion strength, ease-of-removal, and they are environmentally friendly. Various micro- or nano-structures were fabricated and tested for gecko-like dry adhesives, but gecko-like dry adhesives that were developed became easily worn from frequent use. In this study, we propose a metal-coating method to improve the durability of gecko-like dry adhesives. We evaluate the initial adhesion strength and durability by performing repeated adhesion tests on a glass plate. The initial adhesive strength of gold-coated micro-structures was 60% of that for non-coated ones. However, the adhesive strength of gold-coated micro-structures was kept as 58% of their initial adhesion strength, while that of non-coated ones was only 40%.

• Korean Journal of Environment and Ecology
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• v.32 no.4
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• pp.373-380
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• 2018

We examined activities of adult (n=9, 3 females and 6 males) and juvenile (n=4) Schlegel's Japanese gecko (Gekko japonicus) in an indoor vivarium for 47 days to study the preference and competition for shelters at day and night. The result showed the strong correlation between the temperature inside the shelter and the body temperature of Schlegel's Japanese gecko and more individuals observed outside the shelters at nighttime than daytime. Both adults and juveniles showed a preference for certain shelters. The adults preferred the warmer shelters in the daytime while the juveniles preferred the same shelter in both daytime and nighttime. Both adults and juveniles observed outside the shelter at the nighttime had higher body temperature than those found inside. In the daytime, the body temperature of adults was higher than that of juveniles, but there was no significant difference in the nighttime. The results imply that G. japonicus, which is the nocturnal lizard, prefers the shelters with higher temperature and that there is the competition for shelters between adults and juveniles. This study provides the reference data on the relationships between the body temperature and the activities of G. japonicus.

• The Monthly Diabetes
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• s.240
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• pp.35-35
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• 2009

베타세포 손상 및 비만 등 제 2형 당뇨병의 근본적인 원인을 치료해 줄 인슐린 유사체가 개발됐다. 도마뱀의 타액성분을 합성시켜 만든 한국릴리의 '바이에타'는 엑세나타이드를 주성분으로, 인크레틴계열 호르몬인 GLP-1과 유사한 작용을 갖고 있다. 국내에서는 지난해 6월 식품의약품안전청으로부터 승인을 받고 같은 해 11월 출시됐다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.209-210
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.65-66
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• 2013

• The Science & Technology
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• v.33 no.8 s.375
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• pp.15-15
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• 2000

영국의 해부학자 리차드 오웬이 1841년 공룡을 '무서운 도마뱀'으로 이름지으면서 공룡은 찬피 동물이라고 생각해 왔다. 그 후 공룡을 연구한 많은 학자들이 '찬피 동물이냐, 아니냐'를 싸고 주장을 달리해 왔다. 풀리지 않은 수수께끼 공룡의 세계를 들여다 본다.

• Korean Journal of Environment and Ecology
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• v.28 no.6
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• pp.657-663
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• 2014

This study was conducted to investigate the difference in feeding habits of Red-Tongued Viper Snakes, according to available foods sources and areas. The effects of differences in food sources were found on Red-Tongued Viper Snake inhabited in the Jeju Island and its islet Gapado, from May 2006 to Nov. 2010. The food sources for the Red-Tongued viper snake population in the Jeju Island were found to be as follows: Chinese red-headed centipedes (Scolopendra subspinipes mutilans), Jeju Salamanders (Hynobius quelpaertensis), Japanese tree Frogs (Hyla japonica), Narrow-mouthed Toad (Kaloula borealis), Dybowski's Brown Frogs (Rana dybowskii), Black-spotted Pond Frogs (Rana nigromaculata), Smooth Skinks (Scincella vandenburghi), Asian Keelback Snakes (Amphiesma vibakari), Lesser White-toothed Shrews (Crosidura shantungensis), Hallasan Shrews (Sorex caecutiens hallamontanus), and Jeju Striped Field Mice (Apodemus chejuensis). This implies that Red-Tongued Viper Snakes mainly feed on amphibians, reptiles, and small mammals. Among these, amphibians occupied the highest portion at 55.2% followed by mammals at 20.7%, centipedes at 13.8%, and reptiles at 10.3%. On the contrary, Red-tongued viper snake population in Gapado only feed on Chinese red-headed centipedes and Smooth Skinks (S. vandenburghi). Since only a small amount of nutrient can be obtained from Chinese red-headed centipeds or Smooth Skinks, this feeding habit for Red-tongued viper snake would adversely effect on the growth or regeneration. The reason why Red-Tongued viper snake population in the Gapado mainly feed on Lizard and Centipedes in spite of relatively various available food sources, might be due to the low density of other food sources in the Gapado. Red-Tongued viper snake could be feeding on foods that are low in quality but are easily accessible, to minimize energy consumption on searching for other more nutritious foods. A snake tends to select the size of its food depending on the size of its own head. The positive correlation was found between the size of the heads of Red-Tongued viper snakes from the Jeju island and the diameter of their foods. The head size was larger in the males than females in viper snake population from the Jeju Island, which might effect on their selection of foods. However, no significant difference was found between the sizes of the head and the food in the Red-Tongued viper snake population from the Gapado. The findings of this study would provide meaningful data, which directly shows that even within the same viper species they choose different available food sources according to their inhabitance. This leads to their growth and adaptation to their environment which is beneficial for sustaining of its population.

• The Science & Technology
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• v.31 no.4 s.347
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• pp.27-29
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• 1998

남성은 왜 존재하며 과연 필요한 것인가? 남성은 여성에 비해 거칠고 온갖 골칫거리의 원인을 제공하나 종의 존속을 위해 필요한 것이라고 하지만 이 세상에는 처녀생식을 하는 종들도 많다. 칠면조는 수정하지 않은 알에서 부화하여 발육시킬 수 있으며 채찍꼬리 도마뱀은 모두 암컷이다. 또 델로이드윤층과 같은 일부 미생물중에는 4천만년동안 성없이도 살아왔고 민들레와 같이 전혀 무성인 식물도 있다. 수수께끼같은 남성의 세계를 알아본다.

• The Science & Technology
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• v.35 no.11 s.402
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• pp.6-9
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• 2002

스웨덴 왕립아카데미 노벨상 수상자 발표/암세포에 꼬리를 단다/극초음속 순항 미사일 엔진 개발/염소 고환조직, 쥐에 이식하여 정자생성/인간의 언어 유전자 발견/도마뱀이 천장을 기어다니는 비밀은 미세한 털/공룡 단백질 재생/지구, 알려진 것보다 3천만년전 태양계 편입/ 남극에 암흑에너지 탐지용 망원경 설치/약 35억년전 거대 소행성이 지구에 충돌/말라리아 원충 모기 유전자 해독/반물질인 반수소 대량 생산

• Korean Journal of Veterinary Research
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• v.14 no.1
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• pp.45-48
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• 1974

Four water monitors at Zoological Garden, Chang Gyeong Won, Seoul, died within a week after signs of anorexia, lethargy, and discharge from eyes, nasal and oral cavities. The autopsy findings of the four animals were similar. As a main lesion, the liver was congested and diffuse necrosis was observed. The terminal portions of the rectum were studded with numerous small ulcers causing rectal stenosis. Histopathologically, massive hepatic necrosis preceded by fatty changes were evident. The rectal lesions manifested coagulative necrosis and thrombosis in the mucosa and submucosa.