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한봉호 한국수산학회 1977 한국수산과학회지 Vol.10 No.4
Thermal resistance of dried bacterial spores against dry heat was determined. Spore suspensions of Bacillus subtilis var. niger ATCC 9372, Bacillus stearothermophilus Oxoid Code BR 23 and Clostridium sporogenes ATCC 19404 were located on aluminium strips, dried in electric oven under vacuum at room temperature for 10 minutes. The aluminium strips were laid in the middle of gas flow (hot air and superheated steam) with the velocity of 6 m/sec and heated at 120℃ for 180 seconds. The calculated D-values showed that there were no remarkable differences in the heat resistance of bacterial spores between R.H.≤0.012 and R.H.=0.51. Furthermore the thermal resistance of B. subtilis spores to dry heat was greater than that of B. stearothermophilus.
한봉호,조덕제,김근숙 한국수산학회 1979 한국수산과학회지 Vol.12 No.3
두부가공조건 및 순두부용 분말의 제조에 관하여 실험하여 다음과 같은 결과를 얻었다. 원료대두의 수침시간으로는 10시간이 적당하였다. 두유의 응고온도로는 CaSO₄·2H₂O, MgCl₂·6H₂O 및 CaCl₂의 경우 80℃가, GDL을 응고제로 사용할 때는 90℃가 적당하였다. 응고제의 농도로는 CaSO₄·2H₂O, MgCl₂·6H₂O및 CaCl₂의 경우 원료대두에 대하여 2%가, GDL은 3%가 적당하였다. 수율과 제품의 단백질 함랑면으로 보아 GDL의 사용이 CaS0₄·2H₂O, MgCl₂·6H₂O 및 CaCl₂의 사용보다 효과적이었다. 순두부용 분말의 제조는 두유를 분무건조함으로써 가능하였으며, 두유에 크릴즙을 혼합하여 분무건조하여 독특한 색택과 향미를 지닌 순두부용 분말의 제조가 가능하였다. 응고제를 두유와 크릴즙과 함께 혼합, 분무건조하여 순두부제조시 응고제를 달리 사용할 필요가 없는 분말의 제조가 가능하였다. A study on the processing of soy curd powder with soybean milk and krill autolysate has been carried out to prolong the self life and to improve the taste and colour of soy curd. The soy curd was manufactured by coagulation of the soybean milk prepared from soybean through a series of processes of soaking, grinding, heating at 100℃ for 5 minutes and filtration. Ten hours was reasonable as the soaking time of the soybean for the high yield of soybean milk. The use of 3% glucono-δ-lactone to the weight of the raw soybean showed the best coagulation of the soybean milk at 90℃ in relation to the yield and content of crude protein of the soy curd. The soy curd powder prepared by spray drying of soybean milk could be coagulated at 90℃ by the addition of glucono-δ-lactone after suspending in water. The powder manufactured by spray drying of the mixture of soybean milk and krill autolysate could also be coagulated under the same conditions to produce the soft soy curd. Another powder prepared by spray drying of the mixture of soybean milk, krill autolysate and glucono-δ-lactone could be coagulated by standing at room temperature after 2 minutes boiling.
생태적 특성에 따른 산림녹지의 관리방안 -부천시의 사례-
한봉호,이경재 한국조경학회 2001 韓國造景學會誌 Vol.29 No.1
The purpose of this study is to suggest the ecological management based on ecological characteristics of urban forest in Bucheon city. The actual vegetation area in the survey sites(7,426,587$m^2$) consisted of Robinuia pseudoacacia forest(61.6%; 5,574,168 $m^2$), Pinus rigida forest(6.1%), Quercus mongolica community(3.2%), Q.spp.community(2.9%), etc. According to the importance value of artificial planting forest, 58(/300$m^2$) survey plots were divided into 6 groups; 1) R. pseudoacacia forest, 2) R. pseudoacacia-Q.serrata community, 3) R. pseudoacacia-Q.mongolica community, 4) P.rigide forest, 5) P.rigida-Q.serrata community, 6) P.rigida-Q. mongolica community. As the result, the artificial planting forest was expected to the proceeded to Q. serrata community and Q.mongolica community. The ecological succesion stage in the survey sites (7,426,587$m^2$) was divided into 5 states based on actual vegetation, succession trend of artificial planting forest in Bucheon; 1) Stage of impossible succession(4.7%, 2)Stage of inducible succession(78.7%), 3) Stage of progressive succession(2.7%), 4)Sage of last succession(1.4%), 5)Stage of native plant forest(12.5%). The ecological management of urban forest was suggested as the management method for succession promotion, according to density controlling and native species planting in Bucheon. Individual numbers of R. pseudoacacia might be reduced to 6~8 individuals/300$m^2$ at canopy, 9~21 individuals/300$m^2$ at under-story by selective cutting in order to keep 63~70% of total basal area at R. pseudoacacia forest. Individual numbers of P.rigida might be reduced to 8~9 individuals/300$m^2$ at canopy, 27~30individuals/300$m^2$ at under-story by selective cutting in order to keep 68~75% of total basal area at P. rigida forest. 24 species that were selective by constancy analysis were chosen as the ecological appropriate species. Since, this studyis discussing the ares of urban forest and botanical ecology, it is suggested that a study on the relations between of environmental factors such as soil, climate, and vegetation will be performed in the future.
한봉호,조현덕,유홍식,김상호,정윤수 ( Bong Ho Han,Hyun Duck Cho,Hong Sik Yu,Sang Ho Kim,Youn Soo Chung ) 한국수산과학회 1994 한국수산과학회지 Vol.27 No.6
F_0-values of the canned tuna in cottonseed oil (CTCO) were investigated under different sterilizing conditions to optimize the energy consumption and microbiological safety. The F_0-values were measured using a microcomputer based technique. The exact cold point was not the volumetric center of the cans, and it was located in the center of meat mass in can which had ca. 6% of head space. Location of the test cans in retort showed no remarkable influence on the F_0-values when the cans were jumble loaded. The process time before sterilization should be shortened as much as possible to prevent the contamination of microorganisms. Thermophilic spore forming bacteria found from raw and precooked tuna were Bacillus subtilis, Bacillus cereus and Bacillus pasteurii, and the most heat resistant was Bacillus subtilis. The rational F_0-value for the CTCO obtained from the preservation test was regarded as 6min.