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배추 생육 중 토양 수용성 양이온의 경시적 변화 모니터링
김용국(Yong gook Kim),Khok Pros,김경영(Kyoung young Kim),조현종(Hyun Jong Cho),나홍식(Hong Sik Na),한광현(Gwang Hyun Han) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11
토양의 치환성 이온 함량이 아닌 식물체에 직접 흡수되는 수용성 이온들을 모니터링 하는 것이 중요하다. 배추가 생육하면서 토양 중 수용성 양이온들의 함량이 어떻게 변하는지 확인하고, 각 이온의 농도에 따라 그에 알맞은 처방이 이루어져야 한다. 토양 시료는 경기도 이천시의 배추 밭에서 정식 이후 16, 35, 48, 70일에 처리구별 각 3반복씩 채취하였다. 처리구는 N 기준 무처리구(Nil), NPK 비료 표준 시비량의 50% 처리구(Con), 100% 처리구(Inf), 그리고 표준 시비량의 50% 처리구에 음폐퇴비가 100%(C100), 200%(C200), 300%(C300) 추가된 처리구가 있다. 채취한 토양은 풍건 후 2 mm 체에 거르고 1:5 비율로 증류수 추출하였으며, Whatman No.2 필터를 사용하여 여과한 후 0.45 μm 실린지 필터로 재 여과하였다. 토양 추출액의 분석은 (주)테크넬 POCT 분석 키트를 사용하였다. 화학비료 처리구의 토양 중 Na의 농도비율은 생육기간 중 꾸준히 증가하는 경향이 있었다. 하지만 K의 농도비율은 시간이 지남에 따라 경시적 감소가 명확하였다. 음폐퇴비 처리구의 경우 토양 중 Na의 농도비율은 생육기간 중 증가하는 경향이었으며, 특히 퇴비 처리수준에 비례하여 높아졌다. Mg의 농도비율은 모든 처리구에서 비슷한 수준을 유지하였다. 모든 처리구에서 토양 중 K의 농도비율 감소는 Na 농도비율의 증가와 상관관계가 높았다.
가토에서 일측 요관 부분 및 완전폐색시 신장과 요관의 조직학적 변화
김상현,김용웅,육승모,한동석,노안식,임재성,김홍식,나용길,설종구 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2
This study was designed to clarify histologic changes in the experimental rabbit kidney and ureter after unilateral partial or complete ureteral obstruction. A total of 20 adult white rabbits were divided into 4 subgroups in the partial obstruction followed by 2 weeks, the partial obstruction followed by 4 weeks, the complete obstruction followed by 2 weeks, and the complete obstruction followed by 4 weeks. The normal control group was consisted of 5 adult white rabbits. The kidneys and ureters for light microscopy were fixed in 10% neutral formalin, embedded in paraffin and stained with hematoxylin and eosin. Abnormal histologic fingings showed in ipsilateral kidney and ureter of all subgroups(such as dilatation of uriniferous tubule, focal necrosis and desquamation of epithelium, interstitial fibrosis, glomerular congestion, widening of Bowman's space, dilatation of ureter, epithelial cell atrophy or loss, interstitial fibrosis and interstitial inflammation). These findings were most severe in the group of the complete-obstructed ureter for 4 weeks. No significant changes showed in contralateral ureter of all subgroups. The degree of obstruction was severe and period of obstruction was long, the histological changes in ipsilateral side were severe. Despite of changes in ipsilateral side no abnormal findings showed in contralateral side. We suggest that long term experimental investigation of histologic changes in ipsilateral side and compensatory changes in contralateral side have to be studied.
( Seo Na Hong ),( Jong Chun Park ),( Nam Sik Yoon ),( Sang Rok Lee ),( Kye Hun Kim ),( Young Joon Hong ),( Hyung Wook Park ),( Ju Han Kim ),( Young Keun Ahn ),( Myung Ho Jeong ),( Jeong Gwan Cho ),( J 대한내과학회 2008 The Korean Journal of Internal Medicine Vol.23 No.2
Background/Aims: Behcet`s disease (BD) is a systemic disorder associated with a characteristic vasculitis that can involve both veins and arteries of all sizes. Endothelial activation or injury is a characteristic feature of BD. Endothelial dysfunction is widely regarded as being the initial lesion in the development of atherosclerosis. The carotid artery intima-media thickness (IMT) is a widely accepted marker of subclinical atherosclerosis. We aimed to determine the carotid IMT in BD patients with using high-resolution B-mode Doppler ultrasonography. Methods: We studied 40 patients (24 males, mean age: 39.1±8.5 years) who were diagnosed by the international diagnostic criteria of Behcet`s disease and 20 healthy controls (13 males, mean age: 40.2±5.1 years), and the two groups were matched by age and gender. No subject in either group had a history of atherosclerosis or its complications. The clinical data, including the age of onset, the duration of disease, a history of medication, the activity score and the laboratory data were analyzed. Results: The carotid IMT in the BD group was significantly higher than that in the control group (0.71±0.22 mm vs. 0.59±0.09 mm, respectively, p<0.01). Cardiac and major vessel involvements were not identified in the BD group. However, minor vascular involvements were documented in 2 patients with deep vein thrombosis, in 4 patients with superficial thrombophlebitis and in 2 patients with pseudoaneurysm. The carotid IMT in the patients with posterior uveitis or retinal vasculitis was higher than that of the patients without these findings (0.85±0.21 mm vs. 0.64±0.10 mm, respectively, p=0.007), but there was no difference of the IMT according to minor vascular involvement. Conclusions: Despite that there was no significant cardiovascular involvement in the BD patients, the carotid IMT was significantly higher in the BD patients as compared with the healthy controls.