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구남인,송영근,윤경규,이경철,Koo, Nam In,Song, Yeong Geun,Yoon, Kyeong Kyu,Lee, Kyeong Cheol 국립한국농수산대학교 교육개발센터 2022 현장농업연구지 = Journal of practical agricultural resear Vol.24 No.2
Prunus × yedoensis is a representative tree species in residential areas often used as a street tree or park tree, with its popularity due to splendid flowers in the spring. We investigated plant growth, photosynthesis, chlorophyll, and carotenoid concentrations of Prunus yedoensis at 400ml/pot, 1,000ml/pot, and 2,000ml/pot Irrigation treatments. Overall growth indices such as tree height, diameter at root collar (DRC), and total dry weight could be ranked in the decreasing order "2,000ml/pot > 1,000ml/pot > 400ml/pot.". However, 2,000ml/pot featured decreased photosynthesis and total chlorophyll carotenoid contents than 1,000ml/pot treatment after July. And also, The 1,000ml/pot treatment showed relatively high photosynthetic activity and chlorophyll contents. These results suggested that the cultivation of Prunus yedoensis under 1,000ml/pot Irrigation treatment(soil water contents 25~35%) showed the best condition in growth.
Rolling Circle Amplification as Isothermal Gene Amplification in Molecular Diagnostics
구남인,김동은 한국바이오칩학회 2016 BioChip Journal Vol.10 No.4
Rolling circle amplification (RCA) developed in the mid-1990s has been widely used as an efficient isothermal DNA amplification process for molecular diagnosis. This enzymatic process amplifies target DNA sequences with high fidelity and specificity by using the strand displacing DNA polymerases. The product of RCA is long single-stranded DNA that contains tandem repeat of target sequence. Isothermal reaction amplification condition of RCA has an advantage over conventional polymerase chain reaction, because no temperature cycling devices are needed for RCA. Thus, RCA is suitable tool for point-of-care detection of target nucleic acids as well as facile detection of target genes. Combined with various detection methods, RCA could amplify and detect femtomolar scale of target nucleic acids with a specificity of one or two base discrimination. Herein, RCA technology is reviewed with an emphasis on molecular diagnosis of microRNAs, infectious pathogens, and point mutations.
Nonuniform Quntization in Digital Sampling : Comparison of μ-law versus A-law
남인현 선문대학교 첨단과학기술연구소 1996 첨단과학기술연구소 논문집 Vol.1 No.1
Digital Sampling에서의 투 가지 비선형 PCM 방식인 μ-law 와 A-law를 상호 비교하였다. 미학적인 관정으로써는 μ-law가 보든 영역에서 동일한 함수형을 취함으로써 A-law 보다 우월하다고 할 수 있고 따라서 계산 시간을 줄일 수가 있다. 또한 Digital Sampling에서 가장 중요한 기준인 SNR(신호 대 잡음비)은 μ-law 가 A-law 보다 약간 상회하여 역시 μ-law가 더 호의적인 것으로 나타났다. The two characteristic schemes of nonuniform Quantization in digital sampling, μ-law and A-law, were compared with each other. From the esthetic viewpoint μ-law surpasses A-law, because it has the identical functional form for the whole range, and naturally it saves some computing time. It also turned out that the SNR(Signal-to-Noise Ratio) also prefers μ-law, because it is slightly higher in μ-law than in A-law.