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윤예리,한기영,김정환,오세연,노봉수 서울여자대학교 자연과학연구소 2005 자연과학연구논문집 Vol.17 No.-
대두유를 160, 190, 220℃에서 가열하면서 3시간 또는 4시간 간격으로 시료를 취하여 6개의 metal oxide sensor로 구성된 전자코와 2세대 전자코인 GC-SAW를 바탕으로 한 전자코를 사용하여 분석하였다. 주성분 분석결과 가열처리시간과 온도가 증가할수록 제1 주성분 값이 감소하는 것을 볼 수 있었다. 즉, 초기의 열처리를 하지 않은 신선한 대두유와 가열처리된 대두유를 구분할 수 있었다. 특히 190℃와 220℃의 높은 온도에서는 3시간 내지 4시간이면 대두유의 산패가 많이 진행됨을 알 수 있었다. 또한 GC-SAW를 바탕으로 한 전자코를 이용한 결과도 가열온도와 시간이 증가할수록 peak의 수와 면적이 증가함으로써 열처리시간에 따른 패턴 변화를 확인할 수 있었다. 이것으로 대두유의 가열처리에 따른 산패취의 변화를 측정하기 위한 간단한 방법으로 사람의 코처럼 미묘하고 복잡한 향기와 냄새성분을 감지할 수 있는 전자코로 평가할 수 있음을 확인하였다. The discrimination of the heated soybean oil was investigated by using electronic nose. Volatile components from these products were discriminated by six metal oxide sensors. Principal component analysis showed the differences between non-heated soybean oil and heated soybean oil. The first principal component score in soybean oil was reduced from +0.369 score to -0.242 score as the heating time increased. As heating temperature increased, the ratio of resistance decreased, indicating that rancidity of soybean oil increased at high heating temperature. As an alternative, electronic nose based on GC with SAW(surface acoustic wave) sensor was used for discrimination of heated soybean oil. High resolution olfactory imaging, called VaporPrint^(TM), was shown to be particularly useful for evaluating oil quality in its entirety. The result of electronic nose showed significant changes in volatile profiles from soybean oil. Also, peak numbers and areas increased as high heating time and temperature. Analysis using electronic nose with pattern recognition was rapid and simple. And this technique could be an efficient method to predict shelf-life and evaluate quality in food.
Aye Aye,전용덕,이종현,방극수,진종식 경희대학교 융합한의과학연구소 2019 Oriental Pharmacy and Experimental Medicine Vol.19 No.2
Basil (Ocimum basilicum L.) has been used not only as culinary herb for flavor, but traditional medicines such as antiseptic, antispasmodic, digestive regulatory, anti-oxidant and antimicrobial properties. However, the anti-inflammatory activity of plant tissue cultures developed from Ocimum basilicum L. remains unknown. This study aimed to investigate the effect of callus induction and the ethanol extract of in vivo leaf and in vitro (leaf, callus light and dark condition) of Ocimum basilicum L. to examine its anti-inflammatory activity on LPS-stimulated RAW 264.7 macrophage cells in vitro. Callus induction from leaf explants of Ocimum basilicum L. was conducted by incubating leaf explants on MS medium supplemented with various concentrations of KIN in combination with 2,4-D. The constituents of leaf and leaf callus ethanol extracts of Ocimum basilicum L. were quantified using GC–MS analysis. Additionally, cell viability was determined using an MTT assay and anti-inflammatory effects were investigated by measuring NO production. The results showed that the leaf callus was induced on MS medium supplemented with various combination of KIN and 2,4-D over a short time period. Analyses confirmed that in vivo leaf contained many of the constituents than in vitro leaf and callus. Moreover, the ethanol extracts of leaf and leaf callus of Ocimum basilicum L. exhibited non-cytotoxicity and reduced NO production in LPS-stimulated RAW 264.7 macrophage cells. Thus, these results suggest that Ocimum basilicum L. may have potential benefits in preventing pathological inflammation.
“UAV Sensor Selection Based on Aerial Mapping Mission Specific Requirements”
Aye Aye Maw,Nguyen Le Viet Thang,Maxim Tyan,Jae-Woo Lee 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.4
System flexibility and efficient flight automation algorithms make UAV a popular platform for various aerial mapping applications. Small sized UAVs are the prior option for the most part of mapping applications due to low price and ease of operation. The use of UAVs for professional geographic information system or precision agriculture sets very strict requirements to image quality. The selection of appropriate image recording equipment becomes essential for providing the sharp images with high resolution. This paper describes the methodology for calculating the required flight conditions and mission efficiency of an existing electric UAV to satisfy the mission requirements. Scoring method is applied to select the required setup of a visual sensor.
Genome Wide Association Study on the Preharvest Sprouting Resistance in Rice
Aye Aye Khaing,Min-Young Yoon,Byung-Kook Yun,Tae-Sung Kim,Chang-Yong Lee,Yong-Jin Park 한국육종학회 2014 한국육종학회 심포지엄 Vol.2014 No.07
Preharvest sprouting resistance (PHS) causes the reduction of grain yield and also affects the quality of grains, resulting significant economic losses. PHS and its related traits were evaluated and observed in wide range among the 137 diverse rice accessions. To mine the associated signals for PHS resistance, genome wide association study (GWAS) was performed using phenotype data and whole genome resequencing data of 137 diverse rice accessions. This study not only could detect the previously identified dormancy and PHS associated genes but also explore the new candidate genes associated with the PHS and related traits. An example of them is seed dormancy 4 (Sdr4) gene which was found to be associated with germination % at day 14 (D14). This study provided the potential associated candidate genes which might be very useful to improve the PHS resistance in future rice breeding.
Aye Aye Khaing,Yong-Jin Park 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Preharvest sprouting (PHS) not only causes reduction of grain yield, but also affects the quality of grains, resulting into significant economic losses. PHS is governed by multiple genes. Little is known about the large genetic variation of preharvest sprouting in rice. In the present study, genetic variations of four PHS genes, OsVP1, Osaba1, Alpha-amylase3D and OsGA20ox1 were studied by using whole-genome resequencing data of 84 accessions of rice core set. A total of haplotype groups; 27, 29, 6 and 14, for OsVP1, Osaba1, Alpha-amylase3D and OsGA20ox1, respectively, were detected among the 84 accessions. Some new SNPs and InDels were found in exon part of PHS related genes were expected to result in amino acid changes following analysis of the genetic code variations, and the germplasm or varieties which are resistant to preharvest sprouting were explored. Based on this step, phenotyping for PHS is ongoing, and the association mapping of PHS will be conducted by using SNPs resulted from the haplotyping data. The present results will be ultimately useful to the molecular breeding for the development of PHS resistant rice cultivars.