http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
산수유로 건조과육 가공 시 건조 시간, 데치는 온도 및 시간에 따른 건조과육의 품질 특성 변화
정지숙(Ji-Suk Jeung),김한모(Han-Mo Kim),강석원(Seuk-Wan Kang),김은하(Eun-Ha Kim),손병길(Byeong-Gil Son),박노진(No-Jin Park) 한국식품영양과학회 2019 한국식품영양과학회지 Vol.48 No.3
산수유(Corni Fructus)는 산수유나무(Cornus officinalis Siebold et Zucc.)의 열매에서 씨앗을 제거한 건조 과육을 일컫는다. 대부분 재배 농가에서 직접 가공하여 수매하는 유통구조로 제조과정은 동일하나 제조조건은 가가호호(家家戶戶) 다양하다. 본 연구는 산수유 건피 제조조건 정립을 위한 연구의 일환으로 동결건조 산수유와 45°C에서 2, 5, 7, 10, 15시간 건조한 산수유, 산수유 열매를 45°C에서 5시간 건조한 후 씨앗을 분리하기 위해 45, 65, 95°C 항온수조에서 1, 3, 5분 동안 데친 다음 씨앗이 분리된 산수유의 품질특성을 비교 조사하였다. 그 결과 산수유 과육과 씨앗을 분리할 경우 데침 온도보다 데침 시간에 영향을 받는 것으로 확인되었다. pH는 2.89~3.24, 당도는 0.85~0.97°Brix였다. 동결건조 산수유의 morroniside, loganin 및 cornin은 각각 2,226.16, 1,258.15 및 446.24 mg/100 g이었다. 산수유 열매를 5시간 건조하여 65, 95°C에서 1, 3, 5분간 데친 산수유(HD5B)의 주요 기능 물질인 morroniside는 1,769.11~1,928.09 mg/100 g, loganin은 721.83~987.36 mg/100 g 및 cornin은 223.61~395.18 mg/100 g이었다. 건조시간이 증가할수록 기능 물질 3종은 감소하였다. 그러나 7시간 이상 건조하여 씨앗을 분리한 경우 산수유의 모양이 온전하지 못하기 때문에 건조 시간은 2~5시간이 적당할 것으로 판단된다. 색도는 데침 온도보다 데침 시간에 영향을 받았으며, 데침 시간이 증가할수록 L값은 감소하고, a값과 b값은 증가하였다. 산수유 열매를 15시간 건조하여 65, 95°C에서 1, 3, 5분간 데친 산수유(HD15B)의 경우 주요물질의 함량은 높으나 외관의 크기가 작고 모양이 온전하지 못하며, 전반적인 색이 어두웠다. 이상의 연구 결과로 산수유 건피 제조조건의 범위를 설정할 수 있었으며 향후 산수유 원료의 품질기준이 될 수 있을 것으로 본다. Sansuyu (Corni Fructus, CF) usually refers to the dried flesh of the fruit of Cornus officinalis Siebold et Zucc. without seeds. The dried fruit is mostly manufactured by the growers through direct processing and then sold and distributed; however, the processing conditions differ according to the households. After eliminating the seeds from freeze-dried CF and hot air-dried CF at 45°C for 2, 5, 7, 10, and 15 hours, the CF was pre-dried at 45°C for 5, 15, and 22 hours and then blanched for 1, 3, and 5 minutes at 45, 65, and 95°C. According to the results, when the seeds were separated from CF, the blanching time had a greater influence than the blanching temperature. The morroniside, loganin, and cornin contents of freeze-dried CF were 2,226 mg/100 g, 1,258 mg/100 g, and 446 mg/100 g respectively. Regarding the main functional compounds of CF, the morroniside, loganin, and cornin contents were 1,769~2,343, 717∼1,270, and 224∼544 mg/100 g, respectively. As the drying time was increased, the concentration of the functional compounds decreased. On the other hand, the shape of CF was not well preserved when the seeds were separated after more than seven-hour drying. Therefore, two to five-hour drying appears to be appropriate. The color value is more influenced by the blanching time than by the blanching temperature, and as the blanching time increases, the L-value decreases with a concomitant increase in the a-value and b-value. These results can be used to develop the quality standards for dried Sansuyu fruit.
탈수소 열처리 공정에 의한 원심주조 메탈베어링의 제조 시스템
김정훈(Jeung-Hun Kim),김충구(Chung-Gu Kim),변재영(Jea-Young Byen),이은숙(Eun-Suk Lee),양지웅(Ji-Yung Yang),최원식(Won-Sik Choi) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.5
Centrifugal casting is suitable for producing hollow-products using centrifugal force. Bush type metal bearings are the key parts that facilitate the rotational movement of various machinery. Metal bearings produced by conventional centrifugal casting machines show rotational imbalance. Therefore, after injecting a large amount of material, the product"s precision is secured in the secondary processing. Rotational imbalance is caused by the force acting on the rotary disc plate. In order to minimize rotational imbalance, NASTRAN was used for the optimal design and structural analysis. It was concluded that the rotating plate of the conventional centrifugal casting machine should be prevented from tilting. For this purpose, the location & thickness of the stiffeners were obtained through the optimum design. In the conventional centrifugal casting machine, both ends of the product are lower in temperature than the center part, so internal stress occurs. This solves this problem by inserting a heating coil into the rotating plate.
Comparison of Gene Expression Profiles between Keratinocytes, Melanocytes and Fibroblasts
( Jung-suk Lee ),( Dae Hun Kim ),( Dae Kyoung Choi ),( Chang Deok Kim ),( Gwang Bum Ahn ),( Tae Young Yoon ),( Jeung Hoon Lee ),( Ji Yeoun Lee ) 대한피부과학회 2013 Annals of Dermatology Vol.25 No.1
Background: The skin has many important functions such as protection, preservation, temperature regulation, and vitamin D synthesis. It is composed of a variety of cell types including keratinocytes, melanocytes and fibroblasts. Objective: We attempted to compare the gene expression profiles between keratinocytes, melanocytes and fibroblast, using cDNA microarray. Methods: Keratinocytes, melanocytes and fibroblasts were primary cultured from five foreskin specimens. Total RNAs were extracted and pooled to reduce the individual variations, and then used for cDNA microarray. Results: Total 12,028 genes were selected as the reliable genes whose expression was detected in at least one of the three cell types. By comparing the relative expression levels with cutoff limitation as a fourfold change, we obtained 126 fibroblast-specific, 179 keratinocyte-specific and 173 melanocyte- specific genes, many of which are known to be characteristically expressed in each cell type. In addition, we identified many genes whose skin-specific functions have not yet been determined. Conclusion: Our data provide important information on which to base further investigation into the specification of skin cell types. (Ann Dermatol 25(1) 36∼45, 2013)