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이강자(Kang Ja Lee) 한국식품영양과학회 1988 한국식품영양과학회지 Vol.17 No.1
Peach seed flour의 단백질에 관한 연구를한 결과는 다음과 같다.<br/> 일반성분중 조단백질의 함량은 20.38%였다.<br/> 염용해성 단백질의 추출율은 약 70%였으며 단백질 정제 결과 주도니 분획의 수득율은 51%였다.<br/> 전기 영동 결과 11개의 band가 확인되었다.<br/> 분자량은 14,000~110,000 사이인 것으로 나타났다.<br/> Peach seed flour 와 peach seed 분리물의 amino acid 분석결과 arginine, aspartic acid, glutamic acid glycine, leucine 의 함량이 높은 것으로 나타났다.<br/> Nitrogen solubility는 pH가 5.5일때 가장 낮게 나타났다. The proteins of peach seed flour was examined to utilize protein source. The peach seed flour contained 20.38% of crude proteins. The extractability of salt souble proteins of seed were 70% and rocovery rate of main protein fractions separated by sephadex G-200 were about 51%. The electrophoretic analysis showed 11 bands and molecular weight showed 14,000-110,000 in seed proteins. The Amino acid of peach seed flour and isolated were mainly composed of arginine, asparic acid, glutamic acid, glycine and leucine. The solubility of isolated peach seed protein was the lowest at pH 5.5.
Soybean Whey에 培養한 Candida guilliermondii의 菌體組成
이강자(Kang Ja Lee) 한국식품영양과학회 1982 한국식품영양과학회지 Vol.11 No.1
豆腐 製造時 放流되는 soybean whey에 4%의 廢糖密 및 0.5% ammonium acetate 를 添加하여 Candida guilliermondii(KFCC 35120)를 培養하여 liter 當 8.1g의 乾燥菌體를 얻었으며 菌體 分析 結果는 다음과 같다.<br/> 1. 乾燥菌體는 灰水化物 39.3%, 蛋白質 40.5%, 脂質 3.9%, 核酸 9%, 灰分 6%를 含有하였다.<br/> 2. Amino acid 組成은 lysine 含量이 約 10%이었고 glutamic acid가 18%로서 가장 높은 含量을 나타내었다.<br/> 3. 脂肪含量은 C. guilliermondii가 對照의 S. cerevisiae 보다 1.7~2.5倍 높은 含量을 나타내었으며 兩菌株가 모두 whey 單獨으로 培養한 菌體가 廢糖蜜을 添加한 것 보다 約 2倍의 높은 含量을 나타내었다.<br/> 菌體의 脂肪酸 組成은 oleic acid가 48%로서 가장 높은 含量을 나타내었고, linoleic acid와 linolenic acid 含量이 各各 17% 및 4%로서 S. cerevisiae에 比하여 各各 9倍와 24倍에 達한 反面에 palmitic acid 含量은 約 5.5%로서 S. cerevisiae에 比하여 낮았다. A strain of yeast (Candida guilliermondii KFCC 35120) was cultivated by using the soybean whey with supplement of blackstrap molasses (4%) and ammonium acetate (0.5%). By the cultivation continued for 48 hours, 8.1g of dry cell was produced.<br/> The cell was consisted of carbohydrate 39.3%, protein 40.5%, lipid 3.9%, nucleic acid 9% and ashes 6%. The protein was analyzed to contain 18% of glutamic acid and 10% of lysine. Other amino acids showed a content near that of FAO reference protein except Methionine.<br/> Total lipid content was varied by nutritional condition especially by the kind of carbon source, however it showed a content 1.7 to 2.5 times higher than that of Saccaromyccs cerevisiae.<br/> The lipid contain 48% of oleic acid, 17% linoleic acid and 4% linolenic acid. The content of linoleic and lonolenic acid was higher than that of S.cerevisiae by 9 and 24 times, respectively.
이강자(Kang-Ja Lee),박정륭(Jyung-Rewing Park),이성우(Sung-Woo Lee) 한국식품영양과학회 1974 한국식품영양과학회지 Vol.3 No.1
1) It was found that melons stored at 20℃ were deteriorated mainly by phytophthora spot and the li mits for commercial purpose were 6 days for the control and 4 days for the film packed sample. First of all, alternaria rot was produced after 8 days in control group and each group had cold-stroage hindrance after 20 days. The limits for commercial purpose determined by general appearance were 14 days for the control, 18 days for the 0.02㎜ and 16 days for the 0.04 ㎜ group.<br/> 2) Seven to 8% of weight decrease was the limit of commercial purpose by general appearance. The amount of CO₂ excretion was decreased in 20℃ group and increased drastically with deterioration. The amount of CO₂, excretion during storage at 2℃ was about 1/5 to 1/6 of 20℃<br/> 3) The usage of sugar for the substrate of respiration during storage was small and large amount of acids was used for this purpose. The sugar content was decreased with deterioration but acids were increased. The reducing sugar content was decreased and non-reducing sugar content was increased during storage.
이강자 ( Lee Kangja ),위지혜 ( Wi Jihea ),안용훈 ( An Yonghoon ),최항석 ( Choi Hangseok ),손병후 ( Sohn Byunghu ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
This paper presents results of laboratory experiments for estimating the thermal conductivity of backfill materials that were compacted by a variety of compaction energy levels. Silica sand and decomposed granite soil have been chosen as backfill materials in this study. The thermal conductivity of the soil samples increases with an increase in compaction energy and water content, which corresponds to the well-known relationship among thermal conductivity-dry density-water content.
흑연(Graphite) 첨가를 통한 수직 밀폐형 지중열교환기 뒤채움재의 열전도 특성 향상 연구
이강자(Lee, Kang-Ja),길후정(Gil, Hu-Jeong),이철호(Lee, Chul-Ho),최항석(Choi, Hang-Seok),최효범(Choi, Hyo-Pum) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
The thermal conductivity and viscosity(or workability) of graphite-added bentonite grouts and cementitious grouts have been evaluated and compared to determine the suitability of these materials for backfilling vertical boreholes of ground heat exchangers. Seven bentonite grouts from different product sources and a portland cement grout with various mixture ratios were considered in this paper. As a new additive for grout, we choose graphite which has high thermal conductivity. The bentonite grouts indicate that the thermal conductivity and viscosity increase with the content of bentonite or with an addition of Graphite compared with that of silica sand. In case of cementitious grout also increase the thermal conductivity and decrease the workability dramatically though an addition of Graphite. Therefore, we cautiously select the amount of graphite and mixture ratio of bentonite and cement considering not only thermal conductivity but also viscosity for the optimum condition of backfilling material.
이강자(Lee, Kangja),위지혜(Wi, Jihea),안용훈(An, Yonghoon),최항석(Choi, Hangseok),손병후(Sohn, Byunghu) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
This paper presents results of laboratory experiments for estimating the thermal conductivity of backfill materials that were compacted by a variety of compaction energy levels. Silica sand and decomposed granite soil have been chosen as backfill materials in this study. The thermal conductivity of the soil samples increases with an increase in compaction energy and water content, which corresponds to the well-known relationship among thermal conductivity-dry density-water content.
이철호(Lee, Chul-Ho),이강자(Lee, Kang-Ja),길후정(Gil, Hu-Jeong),정재형(Jeoung, Jae-Hyeung),최항석(Choi, Hang-Seok) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
The geothermal energy have been developed as the pro-environmental and the substantial long-term energy. Recently energy foundations and other thermo-active ground structures have been developed to enhance the use of geothermal energy. In this research, a tunnel wall is focused as a source of geothermal energy. If the tunnel wall can be used for geothermal source, it can provide relatively lower cost because it is not necessary to make a deep borehole like in case of closed-loop vertical ground heat exchanger. For analyzing efficiency of heat exchanger in tunnel, laboratory tests and the numerical analyses are performed.