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장경호 ( Koung-ho Jang ),박영기 ( Young-ki Park ),이동주 ( Dong-joo Lee ) 한국환경기술학회 2015 한국환경기술학회지 Vol.16 No.2
본 연구의 목적은 PCA를 사용하여 전주천의 주 수질 오염원을 평가하는데 있다. 자료는 전라북도 보건환경연구원의 1984년 ~ 1990년 동안의 총 8개 수질데이터가 이용되었다. PCA를 사용하여 3개 주성분(Highly factor, Medium factor, Less factor)을 평가하였으며, 수질항목에 대하여 HF(T-N) 50.3%, MF(SS) 17.7%, LF(COD) 13.3%로 나타났다. 수질 관측지점에 대해서는 HF(이성보) 84.3%, MF(전주천 6) 8.73%, LF(전주천 5) 4.55% 등으로 평가되었다. 수질항목, 관측지점 주성분을 직각회전기법(Varimax rotation)에 적용한 결과, 주성분의 모양이 요인축에 따라 그룹화 모양을 나타냈다. 이 모양에 의하면 주성분이 PCA에 의하여 평가되었다고 볼 수 있으며, PCA는 수질평가에 효과적인 기법이라 생각된다. The purpose of this study was to estimate the principal water quality pollution sources at the Jeon-Ju stream using PCA(Principal Component Analysis). All together, eight water quality factors (temperature, pH, DO, BOD, COD, SS, T-N, and T-P) 1984 ~ 1990 of Jeollabukdo Institude of Health & Environment Research were used by PCA and varimax factor rotation tool. The PCA assess three principal factors; relatively highly factor(HF), medium factor (MF), and less factor(LF). The result of application for water quality factors as follows. The HF(T-N) was 50.3%, MF(SS) was 17.7%, and LF(COD) was 13.3%. For water quality stations, the HF(Lee-sung bo), MF(Jeon-Ju stream 6) and LF(Jeon-Ju stream 5) were estimated to be 84.38%, 8.73% and 4.55%, respectively. The result of application for water quality factors and observing stations, the form of the principal factors shows grouping according to factors axis. According to this phenomenon, It was considered that principal component was response to results by PCA. The result of this study is demonstrated that PCA is very effective tool of analysis and interpreation for multi-water quality parameter and multi-station data sets.
Lee Young Koung,Lim Junghyun,Hong Eun Jeong,Kim Seong Bong 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.6
Tobacco is an excellent model plant to study developmental processes and cellular biology. Surface dielectric barrier discharge (sDBD) was used to generate plasma activated water (PAW), and the PAW was indirectly applied to study tobacco plant growth during the early developmental stages. Solid media were treated with the PAW for 8- and 18-day-old seedlings, and the efects on both the vegetative and root phenotypes were observed during the early developmental stages. In the vegetative tissue, the cotyledon size was large for the seedling that was cultivated by plasma activated water for the 12 min PAW (PAW12) treatment. The PAW dramatically elongated the cotyledon by 40% due to increased cell expansion in the leaf length direction, not cell proliferation. In addition to the vegetative tissue, the root length due to the PAW was signifcantly enhanced at the primary root with elongated root hairs. According to molecular analysis, the NT_ COBRA-LIKE 9 (COBL) and two NT_ XYLOGLUCAN ENDO-TRANSGLYCOSYLASE/HYDROLASE (XTH) genes, NT_XTH9 and NT_XTH15, were signifcantly over-expressed by the PAW treatment compared with untreated deionized water (DW), indicating that the PAW efects are from modulating the expression of target genes. These results demonstrate that PAW might promote tobacco plant growth both in the cotyledon and root hair tissues via the NT_COBL, NT_XTH9 and NT_XTH15 genes.
이승철,김건영,이영경,김영승,송민호,박강서 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2
Several complications of pregnancy may occur with increased frequency in diabetic pregnancies including ketoacidosis. Pregnancy-induced lipolysis and ketone body production makes women more susceptible to diabetic ketoacidosis. The effect on the fetus of maternal ketoacidosis may be severe. If untreated, it may cause fetal death. We investigated our experience of the clinical features of diabetic ketoacidosis in 352 diabetic pregnancies. We reviewed 352 cases of diabetic pregnancy during, the period from March, 1988 to February, 1997 retrospectively. An episode of ketoacidosis occurred during or immediately after the delivery in nine patients, representing 2.56 % of diabetic pregnancies. The mean age of patients was 29.8±4.4^*(range 23-38) years. The mean duration of onset of diabetes was 4.83.±3.40^* years. Diabetes was controlled on insulin in all patients (30.4±1.8^* U/ D). Only two of all patients were nulliparous women and the others multiparous women. There was one spontaneous abortion at eighth week gestation, the remaining 8 fetus all survived. The mean weight of fetus was 3.34±0.79^*kg. The four of nine fetus were macrosomia(birth weight in excess of 4kg). On the past history, risk factors were associated with acute pyelonephritis and acute tonsillitis in two patients. In our cases, maternal acidosis was not severe. Levels of pH and HC03- were 7.17±0.11^* and 12.4±4.2^*(mEq/I). Initial level of blood glucose was 29.18±8.96^* nmol/1 and HbAlc was 10.28±11.27^*%. On the admission, the mean level of serum C-peptide was 1.04±0.72^*(nmol/L). In 28-year-old multiparous patient, initial level of serum C-peptide was 0.12 nmol/L and the other cases were higher than 0.4nmol/L. In our cases, the levels of blood glucose and HbAlc in diabetic ketoacidosis patients were not higher than in the general population of diabetic pregnant women. All episode of ketoaeidosis was occurred during insulin therapy and a definite precipitating factor of ketoacidosis was identified in two patients. A classification of diabetes by the initial level of serum C-peptide, We suggest that one of nine patients can be classified as IDDM.(* mean ±SD)
Lee Young Koung,김근화,Ware Doreen 한국식물생명공학회 2024 Plant biotechnology reports Vol.18 No.2
Zinc-finger homeodomain transcription factors (ZF-HD TFs) are relatively a small gene family in Arabidopsis involved in plant development and stress response. However, the biological functions of ZF-HD TFs remain largely undiscovered. Here, we aimed to elucidate the evolutionary history and functional role of ZF-HD TFs in other species, by performing phylogenic analysis and domain and motif identification studies in Arabidopsis, sorghum (Sorghum bicolor), and moss (Physcomitrella patens). Forty-two ZF-HD TF proteins were classified into two distinct subfamilies based on the conserved ZF Cys/His-rich dimerization and homeodomain (HD) domains. The phylogenetic tree of proteins was further divided into five groups based on the similarity of sequences, and three distinct motifs were defined in the amino acid sequences. Genetic analysis revealed that the moss PpZF-HD1, Pp3c1_15290, gene partially rescued the amiR zf-HD-79 mutant lines at phenotypic and molecular levels. Subcellular localization studies revealed that moss PpZF-HD1 was localized in the cytosol and nuclei. Phylogenetic analysis and genetic complementation revealed that ZF-HD TFs play functional roles in regulating plant architecture, which is conserved in Arabidopsis, sorghum, and moss. Although our study is only a preliminary exploration into ZF-HD TFs, it provides a novel perspective that will help future researchers better understand the biological role of ZF-HD proteins in plants.