칼슘이 존재하고 있을 때 분리대두단백질의 유화 안정에 대한 인산(Na_2HPO_4)과 구연산염(sodium citrate)의 효과를 염농도와 첨가순서에 관하여 연구하였다. 인산과 구연산염을 첨가하였을 때 단백질 용액의 pH는 증가하였으나 용해도는 감소하였다. 칼슘(CaCl_2)을 첨가하였을 때 에멀젼의 유화 안정도는 크게 감소하였으며, 3mM 이상의 농도에서 유화 안정도는 거의 나타나지 않았다. CaCl_2가 5mM 존재하고 있을 때 Na_2HPO_4를 첨가하면 20mM 농도까지는 유화안정도가 증가하나 그 이상의 농도에서는 유화 안정도가 감소하는 경향을 보였다. 또한 Na_2HPO_4를 먼저 첨가한 후 CaCl_2를 가한 경우가 그 반대의 경우보다 전체적으로 더 높은 유화 안정도를 보였다. CaCl_2의 존재하에서 구연산염을 첨가한 경우에도 인산염과 거의 비슷한 경향을 보였다. 본 연구에서는 분리대두단백질의 용해도는 유화 안정성과 밀접한 관계가 있는 것으로 나타났다.

Due to depletion of fish resources as time goes on, the trawl fishing industries which have caught the demersal fish is confronting with financial difficulties. For the purpose of breaking these difficulties, trawlers are expanding the fishing targets to the midwater from bottom stock. The trawlers become to be able to detect the fish schools not only vertical but also horizontal direction by equipping the sonar system on board. Even though the operator locates the fish school by sonar, it is not easy to make a desirable catch of the fish school which is detected, for the reason of the maneuverring characteristics of trawler. For the purpose of enhancing the efficiency of a fish catch, the auther performed a series of on board experiments to investigate the maneuverablilites of midwater trawaler. The obtained results are summerized as follows: 1. The higher the RPM of main engine, the smaller the magnitude of turning circle. And it is smaller in the right than in the left turning 2. Towing speed varies irregularly under turning novenment. When the RPM of main engine being 560, 680 the angular velocities are 11.3deg/min, 22.5deg/min respectively. 3. The difference of new course distance between calculated by maneuverring indices and measured by experimental ship is high when altering course being large and towing speed low. 4. The faster the towing speed is, the shorter the new course distance becomes. When towing speed is same in right and left turning movement, the now course distance is shorter in case of right turning movement than in left. 5. It is considered to be convenient for a navigator to utilize the curves for altering course in order to steer the ship rapidly and accurately.

In order to estimate the mesh selectivity master curves and the optimum mesh size, experiments were made by the cover net method with the cod-ends of the five different the opening mesh sizes(51.2mm, 70.2mm, 77.6mm, 88.0mm and 111.3mm). After that 163 hauling were performed and there by investigated, on the training vessel Saebada in the Southern Korean Sea and East China Sea from June 1991 to August 1992. In this report, the mesh selectivity master curves were fitted by using logistic function(S=1/(1+exp super(-(aR+b))), R=(L-L sub(0))/(M-M sub(0)) and the optimum mesh sizes were estimated from each master curve. In this case, a and b are the selection parameters, M is the mesh size of each experimental cod-end. L is body length, L sub(0) and M sub(0) is the distance from the coordinate origine to intersection of linear regression between 25% and 50% selection length. The results obtained are summarized as follows; 1. Trachurus japonicus: Mesh selectivity master curve parameters: a and b were 2. 25, -4.73 respectively and optimum mesh size was estimated to be 79.3mm. 2. Trichiurus lepturus: Mesh selectivity master curve parameters: a and b were 0.81, -3.17 respectively and optimum mesh size was estimated to be 64.5mm. 3. Photololigo edulis: Mesh selectivity master curve parameters: a and b were 1.30m, -4.10 respectively and optimum mesh size was estimated to be 89.9mm. 4. Todarodes pacificus: Mesh selectivity master curve parameters: a and b were 1. 35, -3.45 respectively and optimum mesh size was estimated to be 89.4mm.

당화효소와 호정화효소의 생산능력이 높고 향도 좋은 Aspergillus oryzae L2와 밀가루로써 누룩을 제조할 때에 당화효소와 단백질분해효소의 생산을 위한 배양조건을 검토하였다. 밀가루를 가열처리 했을 때에는 날밀가루에 비하여 단백질분해효소의 생산은 증가되었으나 당화효소의 생산은 감소되었다. 밀가루에 0.5%의 염산을 함유하는 물을 급수했을 때에는 당화효소와 단백질분해호소의 생산이 현저하게 감소되었다. 급수비율은 밀가루에 대하여 28%일 때가 가장 좋았다. 국균을 접종한 후 즉시 성형을 하는 것보다 20시간 전 배양을 한 후에 성형을 하는 것이 당화효소의 생산에 좋았고 단백질분해효소의 생산은 성형을 하지 않은 것이 좋았다. 당화효소생산의 최적온도는 36℃이었고 단백질분해효소생산의 최적 온도는 28℃이었다.

Generally a navigator evaluated the maneuverability of his ship by the scale of turning circle which was described only by the largest rudder angle of the port and starboard sides. But to have the sufficient knowledge of his ship's maneuvering characteristics he should consider the data about the new course keeping test, the spiral test, and the turning circle tests in accordance with the rudder angles together. In this paper the author performed the above tests to study the maneuverability of the stern trawler M.S. Pusan 404 which is a training ship of the National Fisheries University of Pusan. The obtained results are summarized as follows: 1. When the rudder angles being 5。, 10。, 20。, 30。, 35。 the advances of the starboard side turning circles were 12.8, 8.2, 4.8, 2.9, 2.7 times as large as the length of the ship, and of the port side turning circles were 13.3, 8.7, 5.4, 3.5, 2.9, time as large as the large as it. Under the same conditions the tactical diameters were 15.1, 9.7, 5.2, 3.1, 2.8 times as large as the length of the ship, for starboard side, and 17.2, 12.4, 6.4, 3.7, 3.2 times as large as it for port side. 2. As the rudder angle being increased the ratio of the advance to the tactical diameter was nearly 1 and her obeying ability was better than that of the small angle. 3. The mean values of the rates of speed reduction during the steady turning motion were 0.96, 0.92, 0.82, 0.71, 0.65 in accordance with the rudder angles. 4. The relative formulas between the distance to the new course y and the altering course x were as follows: When rudder angles being 10。, 20。, 30。, y=52.2222+1.6133x, y=48.750+0.9383x, y=39.250+0.655x respectively. 5. There was little difference of the distance to the new course between rudder angle 20。and 30。, and so it is desirable for a navigator to a navigator to use the small rudder angles unless sudden emergencies. 6. Though her rudder angle being small her course stability was good according to the spiral tests.

A computer program for automatic correlation of marine magnetic profiles is developed and tested. This method first analyze the power spectra of two series, a short one selected from the reference profile and a long one chosen from the other profile, to obtain the direction and rate of stretching and then correlation is made. The method appears to be relatively sensitive to noise contained in data, but it saves a large amount of computing time as compared with the iterative stretching and cross-correlation method. And the method is specially effective for correlating profiles whose spreading rates and direction are variable within limited range of change. Reduction to pole technique has been applied to marine magnetic profiles to correct asymmetric patterns of the data due to different magnetization direction. Correlation made between pole-reduced data sets give improved results in many cases.

부산-제주간 선로상에서 정박중일 때와 항행중일 때 Loran C 위치를 관측하여 시간대별, 지역별, 침로별 위치의 정도와 편위오차를 수정하여 분석.검토한 결과는 다음과 같다. 1. 주야간별 위치의 정도는 큰 차이가 없었고, 수신점주위에 높은 산이 있을 경우 편위거리의 오차가 더욱 커졌다. 2. 정박중과 항행중에 편위거리의 평균치는 각각 0.188, 0.452마일이었고, 침로의 변화에 따른 측위오차의 변동은 거의 없었다. 3. 위치정도를 높이기 위해서는 속도보정과 측지계변환만으로도 정도가 높은 위치를 구할 수 있었다

Toxohormone-L is a lipolytic factor, found in ascites fluid of sarcoma 180-bearing mice and of patients with hepatoma. A substance that inhibited the lipolytic action of toxohormone-L was isolated from white ginseng powder. This substance was an acidic polysaccharides. It inhibited toxohormone-L-induced lipolysis in a dose dependent manner at concentrations higher than 10㎍/㎖.

일반적으로 사과나무의 일반 대목용으로 많이 이용되고 있는 삼엽해당(Malus sieboldii)의 종자를 1988년 11월에 경북대학교 부속 농장에서 채취하여 15주 동안 습기 있는 모래에 충적 처리후 발아와 그후의 생육상을 알기 위하여 BA와 ABA를 처리하여 다음과 같은 결과를 얻었다. 1. 처리구중에 , BA구는 발아율이 높았고 ABA처리구는 낮았으며 ABA처리가 다시 종자를 휴면상태로 유도시키던지, 정상적인 묘가 되지 못하였다. 2. 평균 발아기간 역시 ABA를 처리한 구들은 다른구에 비하여 2일 이상 지연되었다. 3. 평균 유아와 유근의 길이는 ABA 20ppm 처리구가 가장 불량하였다. 이는 묘의 세력이 약하다는 것을 나타내며 불량묘가 생산되었다. 4. 생성된 묘의 생체중과 건물중의 비교에서 BA 처리 구들이 비교적 묘의 무게가 무거웠고 ABA처리구는 가벼워서 비정상적인 묘를 형성하였다. 이상의 결과를 종합하면 휴면이 타파된 종자에 ABA를 외적으로 처리하면 다시 휴면상태가 되며 또 발아가 되어도 생리적인 왜화 상태를 나타낸다. 그래서 묘의 건전한 생장을 위해서는 BA가 우수하다고 인정되어 진다.

For the study of the effect of dietary phospholipid(PL) on the lipid components of serum and organ tissues in Sprague-Dawley rats, 56 Male-rats were divided into 8 groups, which was composed of 7. One group was fed with basal diet(normal group). And other experimental groups were fed ad libitum with the mixture of carbohydrate : casein: salt mixture : vitamin mixture(60 : 18 : 4 : 1) and at the same time fed administratively with 1 gram of phospholipid -free soybean oil, corn oil and sesame oil, and phospholipid-containing soybean oil, corn oil and sesame oil respectively. After 60 days the rats were fasted for 12 hours and then decapitated to collect blood and separate organ tissues. The lipid and protein components of serum and organ tissues were analized. The results of this study are summarized as follows. The supplementation of dietary phospholipid decreases the food efficiency ratio and the growth rate of experimental rats ; it increases the level of serum phospholipid and cholesterol ester, but decreases the value of total-cholesterol (T-chol.)/PL ; it decreases the value of albumin/globulin (A/G ratio)of serum protein and it increases the level of phosphatidyl ethanolamine(PE) in serum and organ tissues. And the correlation coefficients among the contents of T-chol., of HDL-chol. and of phospholipid in serum and liver are negative in general. Therefore I think that we must eat dietary phospholipid unpurified from vegetable oil to prevent development of atherosclerosis and fat liver.

부산수산대학 실습선 부산404호(GT: 150ton)의 조종성능을 연구하기 위해 Z 조종시험을 한 결과를 요약하면 다음과 같다. 1. 타각 10˚, 20˚, 30˚Z 시험에서 선회성지수 K'는 각각 0.9359, 0.9781, 0.9108이고, 추종성지수T'는 0.1955, 0.5802, 0.7090으로서 선회성은 타각 20˚일때가 추종성은 타각 10˚일때가 좋은 것으로 나타나서 대체적으로 대타각을 사용할 때보다도 소타각을 사용하는 것이 조종성이 좋음을 알 수 있었다. 2. Over shoot angle은 타각 10˚, 20˚, 30˚일 때 우현전타했을때는 각각 4.5˚, 12˚, 21˚이었고 좌현전타했을 때는 각각 5.5˚, 15˚, 23˚로서 우현전타했을 때가 좌현전타했을 때보다도 조종성이 조금 양호했다. 3. 타각 10˚Z 시험에서 일조작간 항주거리는 배 길이의 8.7배가되어 종성표준거리인 5~11배 이내가 되므로 대체적으로 조종성능이 양호하다고 볼 수 있다.

The objective of this study was to improved the limited functional characteristics of mungbean whole` globulin. The mungbean whole globulin was acylated with succinic and acetic anhydride, and the functional properties of acylated protein were investigated. The results obtained were as follows : 1. The UV-absorption spectra of acylated whole globulins with that of the succinylated 74% whole globulin as large blue shift of the absorption maximum and minimum wavelength from 275㎚ to 269㎚, respectively. 2. The mobility of acylated whole globulin were increased on PAGE pattern, and degree of mobility was particulary remarkable in case of succinylation. 3. The water absorption capacity of whole globulin was increased by acylation. The most increased rate of whole globulin was 174.02% from succinylated 74%. The oil absorption capacity of whole globulin was increased by acylation. The most increased rate of whole globulin was 165.41% from acetylated 81.77%. 4. The bulk density of whole globulin was decreased by acylation, and the greater the extent of acylation, the smaller the bulk density. 5. The foaming capacity and stability of whole globulin was increased by acylation, and remarkably high in 74% succinylated whole globulin, in contrast, however, the foaming capacity and stability of native and acylated whole globulin were decreased by heat treatment.

선박이 항해 중 침로와 속력의 변화가 NNSS 측위정도에 미치는 영향을 분석하기 위해 위성별, 위성통과방향별, 앙각별로 계산기 simulation한 결과는 다음과 같다. 1. 위성의 앙각과 통과방향이 일정한 경우 위성의 종류에 따른 측위정도는 그 차이가 거의 없었다. 2. 속력오차에 의한 측위정도는 선속의 대소에는 관계없이 선속오차의 절대치에 비례하고 선박의 침로에 따라 달라진다. 3. 속력오차가 일정할 경우 위성의 통과방향에 따라 측위정도가 달라지며 동측북상과 서측남하인 경우와 서측북상과 동측남하인 경우는 서로 비슷한 측위정도를 나타내었다. 4. 선박의 침로가 남북방향일 때가 동서방향일 때보다도 오차가 크며 앙각이 높을수록 오차도 더욱 컸다.