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Algorithm to determine injection position in olive flounder,Paralichthys olivaceus
차봉진,권문경,김현영,박명애 한국어병학회 2013 한국어병학회지 Vol.26 No.2
This study aimed to develop an algorithm to determine the optimal injection position in olive flounder (Paralichthys olivaceus) when a vaccine is injected into the fish by using a vision-based automatic equipment measuring the total length (TL), width and weight of the fish. Over a 5-month period, 500 olive flounders were examined to analyze the relation of the fish size and to the shape and location of its abdomen, using radiography, a ruler plate and scale. There were significant correlations between the TL and the shape and location of the abdomen. The abdomen was located 0.232TL – 2.7221 mm (R2 = 0.8787) from the end of the mouth of the fish. The height and width of the abdomen in the fish were 0.1292TL + 1.8768 mm (R2 = 0.7935) and 0.183TL–5.9791 mm (R2 = 0.8641), respectively. The injection point in the abdominal region avoiding organs was determined by calculating the center of gravity of the abdomen volume. This can be expressed as g (0.2759TL – 2.0965, 0.1295TL – 4.2325) on the basis of TL line coordinates. The injection point by the expressed coordinates had errors for the x and y axes as 12.15 mm and 8.28 mm, respectively. These were enough to use the algorithm to injection for the equipment. This automated method to determine the position of any part in the fish can also be used for other purposes, for example, intramuscular injection or auto-tagging of fish.
북방전복 Haliotis discus hannai (Ino, 1952) 의 폐사규명을 위한 모형 양식시설 주변의 조류 분포 분석
차봉진,최양호,양용수,박민우,김병학,편용범 한국패류학회 2014 The Korean Journal of Malacology Vol.30 No.1
This study is aimed at figuring out the reasons of the mass mortality of abalone and the increase in its mortality rate in the sea cage. The study suggests that lack seawater circulation in an abalone aquaculture cage is an important culprit for it. We analyzed the current distribution around a 1/20 scaled-down abalone unit cage of 4 rows and 10 columns by fluid flow visualization technique (PIV : Particle Image Velocimetry). The speed of current in the model cage definitely slowed down in the first column of a unit cage. We also observed currents going down to the bottom of a water tank from the unit cages placed in the middle. The speed of wakes behind inside the row in the middle was slower than that outside the row. Water velocity inside and outside a real abalone cage at Nowha Island adjacent to Wan Island was measured to verify results from the tank test. The speed of current in front of the cage by 2 m was 0.11 m/sec while it was only 0.0009 m/sec inside the cage. It had similar findings with those of a tank test. 완도에서 주로 사용되는 4열 10행의 가두리 1조를 조합한형태로 구성된 PE프레임의 내파성 전복가두리를 1/20로 축소하여 모형을 만들고 유체흐름 가시화 실험을 통해 전복가두리주위의 해수의 흐름을 파악했다. 실험의 결과를 검증하기 위해노화도 현장의 전복양식 가두리의 내부와 외부의 유속을 측정하였다. 연구의 결과는 아래와 같다. 1. 모형실험에서 전복가두리에 입사하는 해수는 대부분 첫 번째 단위 가두리 (칸) 를 통과하지 못하였다. 2. 모형 전복가두리 중앙 부위에서는 가두리에서 수조바닥으로향하는 흐름을 관측하였다. 3. 모형 전복가두리의 외측 열을 빠져나가는 유체의 유속이 내측 열을 빠져나가는 유체의 유속보다 빨랐다. 4. 노화도의 현장 양식가두리의 2 m앞의 조류의 유속은 0.11 m/sec였지만 가두리 칸 내부의 유속은 0.0009 m/sec로 거의 움직임이 없었다. 5. 현재의 전복가두리 형태는 해수의 유통이 원활하지 않아 가두리 내부로 새로운 해수를 공급하기 어려울 것으로 판단된다.
신규 Capsaicin 유도체 DA - 5018 을 함유한 외용진통제의 제제설계 Ⅰ: 평가법 확립 및 외용크림제의 설계
차봉진,이응두,김원배,이민화 ( Bong Jin Cha,Eung Doo Lee,Won Bae Kim,Min Hwa Lee ) 한국약제학회 1997 Journal of Pharmaceutical Investigation Vol.27 No.1
N/A To formulate the topical analgesic preparation of a new capsaicin derivative. DA-5018, a skin penetration evaluation system was established and the effect of composition of formulation on skin penetration using this system was evaluated. The effect of massage on hairless mouse skin penetration and inter-day variation of this effect were investigated using test formulations (cream). In massage group, compared with non-massage group, absolute penetration amount of DA-5018 increased and this experimental system was found to be reproducible. The effects of pH of water phase, ratio of oil/water and the concentration of active ingredient in cream on skin penetration were investigated. The permeation of DA-5018 from the cream increased with increasing pH of water phase to 9. But at pH 10, the permeation of DA-5018 decreased, because of the physical instability of the cream. The permeation of DA-5018 from the cream increased with increasing the ratio of oil/water of the cream. The increase of the content of DA-5018 to 0.3% increased the permeation of DA-5018. but at high concentration(1.0%), the permeation of DA-5018 decreased, due to the instability of the cream.