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메기, Parasilurus asotus 사료의 최적 단백질 함량
강석중,정우건 國立統營水産專門大學 附設 水産科學硏究所 1994 수산과학연구소보고 Vol.5 No.-
새로운 양식 대상종으로 메기의 생산량 증가를 위하여 사료 중 최적 단백질 함량을 설정 하고자 실험한 결과는 다음과 같다. 평균 체중 약 7g되는 메기 치어의 체중은 사료중 단백질 함량 25%~55% 사이에서 단백질 함량이 높은 사료를 공급할수록 증가하였으나,근육 단백질의 증가는 45% 부근에서 최고치에 달하였으며,그 이상으로 사료 단백질 함량을 증가시켜도 변화가 없었다. 단백질 효율 및 정미 단백 이용율은 25% 부근에서 최고치에 달했지만 45% 부근에서 일시적으로 증가하여 단백질 함량 45% 실험구가 가장 양호한 것으로 나타났다. 따라서 멸치분을 단백질 원으로 하였을 때 메기 치어 사료의 최적 단백질 함량은 45%로 사료된다. Feeding trials were conducted for a test of the optimum dietary protein levels for the fingerling Korean catfish, Parasilurus asotus. The growth response was examined in terms of weight gain, feed coefficient, protein efficiency ratio and net protein utilization for 8 weeks at 23~27℃. Within a range of 25 to 55% crude protein levels in the diet, the body weight increased while the dietary protein level increased. Accumulation of protein in the body reached the maximum when the crude protein level in the diet was at 45%. These results indicate that the optimum dietary protein level of fingerling Korean catfish was about 45% when anchovy meal was used as the protein source.
姜錫虞,成濟鉉,徐成輔,朴成澤 부산교육대학교 과학교육연구소 1982 科學敎育硏究 Vol.7 No.-
This study is an analysis and a plan for the improvement on a teaching method, a development of the teaching instruments in integrated subject of mathematics and natural science called "Inquiring Life". Thus this study is summarized as follows: (1) An analysis of the integrated textbook. ① The proportion of the time required for teaching mathematics and natural science is 2:1 in our curriculum. However, in the practical guide book of the Inquiring Life, it has been investigated that the time allotted for mathematics is 12 periods more than the time allotted for natural science, furthermore its significant difference is to appear in x^2=3.86 (p<0.05). ② It has been found that there is a meaning of the integration in the first-term text-book, because the quantity of the contents which is integrated in it is 48.7% of the whole. But there is a problem which must be corrected in the second-term textbook, because such quantity is merely 25.6% of the whole. ③ The time required for teaching a field "figures" was 12 periods (9.2%) of the whole in the textbook of the third revised curriculum (1973). However, since the time required for it in the new textbook is only 2.5 periods (2.0%), this is to show a significant difference in x^2=4.62 (p<0.05). ④ It is because of a emphasis on the problem-solving that the time required for teaching the field "relations" has increased more than that of the preceding textbook. ⑤ There is some resistance in "a reclassification of the shaped boards" and "a learning for preservation of a quantity" to construct a possibility of the learning achievment. ⑥ It is found that the contents and the expressions of the integrated textbook is suitable for our pupils, because, in a questionary investigation for their appropriateness, a significant difference is to appear in x^2=9.49 (p<0.05). (2) The teaching method of the integrated textbook. The integrated teaching method is verified to be effective for a group of the dull pupils by showing a significant difference with CR_M=1.99 (p<0.05). (3) A development of the teaching instruments in the integrated textbook. The integrated teaching instruments that are considered to be a interest of pupils, a acceleration of thoughts, a economic condition, a exactness, a convenience, a firmness and anewness, are efficient for our pupils. (4) An estimation for the integrated textbook. An integration of the curriculum and the revision of the form the pupils' cumulative records are demanded in order to get the good estimations for the integrated concepts.
도로공사 우수배제시설의 시공성 및 성능 개선에 관한 연구
강인석,박서영,곽중민,이우식,정수언 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-
Generally, a street-inlet in road facility is aimed to exclude rainfall and filth from sewer system. In order to solve some problems in current street inlet facilities, some revised inlet systems have been suggested. Those revised facilities can also solve an environmental problem like a bad smell emitting from the worn facility and solve civil petitions due to its safety and poor quality of passing rainfall. In this study, the existing rainfall exclusion facility was investigated including foreign countries and a developed street inlet model was represented through estimating of their structures, characteristics and costs. It also be analyzed that the existing problems can be solved by a trial construction and the developed model was compared with existing models by focusing on constructability and maintenance capacity.
강인석,박서영,이우식,곽중민 慶尙大學校 1998 論文集 Vol.37 No.-
Construction cost estimating is a procedure for surveying the price to complete a project. The results from cost estimating are used as scheduled budgets by public organizations and actual costs by contractors. This study analyzes the existing construction cost estimating system by the comparative study of cost items in Korea and Japan, and then suggests some methods with improvement related to the problems awaiting solutions. The proposed methods include the reorganized cost items for estimating construction cost and the improved procedures for estimating construction cost and the improved procedures for estimating construction equipment cost.
새로운 Baculoviurs 전이벡터를 이용한 Escherichia coli β-galactosidase 유전자의 발현
우수동,김우진,김혜성,진병래,강석권 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.1
국내에서 분리된 BmNPV를 이용하여 제작된 새로운 전이벡터 pBmKSK1에 외래 유전자로서 E. coli lacZ 유전자를 클로닝하고 재조합 바이러스를 제작하였다. 재조합 바이러스에 대하여 Southern blotting 분석을 실시하여 lacZ 유전자의 존재를 확인하였으며, 재조합 바이러스가 접종된 세포의 SDS-PAGE 및 Western blotting 분석을 통하여 β-galactosidase의 발현을 확인하였다. 재조합 바이러스의 발현효율을 누에 세포주 및 유충에서 비교 조사한 결과, 유충에서 더욱 높은 발현량을 보임을 확인하였다. To investigate the expression efficiency of new transfer vector of Bombyx mori nuclear polyhedrosis virus (BmNPV), Escherichia coli lacZ gene was inserted into new transfer vector pBmKSK1, under the control of polyhedrin promoter and expressed in BmN-4 cells coninfected with transfer vector pBmKSK1-LacZ and vild type BmNPV genome, and analysed by Southern blotting. The expression of β-galactosidase was characterized by SDS-PAGE, Western blotting and β-galactosidase activity assay. The results showed that the level of expression in silkworn larvae was higher than that of BmN-4 cells.
강석중,최병대,정우건 國立統營水産專門大學 附設 水産科學硏究所 1994 수산과학연구소보고 Vol.5 No.-
양어 사료에 피드오일을 첨가하면 사료 효율이 향상된다. 나일틸라피아가 요구하는 필수 지방산의 종류를 알아보기 위하여 대두유 및 옥수수유 등의 식물유 및 오징어 간유, 어유를 사료에 첨가하고 사육하여 다음과 같은 결과를 얻었다. n-6 계열이 풍부한 식물유를 투여한 실험구가 n-3 계열의 어유를 투여한 실험구 보다 성장이 좋았으며 그 중에서도 대두유 첨가구가 가장 양호하였다. 총 지질중의 20:3n-9의 수준은 유지의 종류에 따라 현저한 차이는 없었으나 극성 지질중의 20:3n-9의 수준은 어유 및 오징어 간유 보다는 식물유구에서 낮게 나타났다. 틸라피아 사료에 첨가하는 지질로서는 n-6계열을 많이 포함하는 것이 적당할 것으로 나타났다. Experiments were conducted to find out suitable dietary lipids in the practical feed for Nile tilapia, Oreochromis niloticus. Soybean oil, corn oil, fish oil or cuttlefish liver oil was mixed in the diet and tested. The best weight gain and feed efficiency were obtained from the fish fed soybean oil or corn oil, both rich in 18:2n-6. But the growth rate of fish fed diet with fish oil or cuttlefish liver oil were inferior. The levels of 20:3n-9 in the total lipid were not different in all tested lipids, but that in the polar lipid of the fish oil or cuttlefish liver oil were lower than that in the soybean oil or corn oil. Thus, vegetable oil such as soybean oil or corn oil, rich in 18:2n-6, were suitable as dietary lipid for Nile tilapia. Unlike other fish species, fish oil or cuttlefish liver oil showed no essential dietary value for this species.