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RISS 인기검색어
- 검색키워드
- 저자 : Tatsuhiro Seki (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Fundamental Structure in Simultaneous Removal for Phytoplankton and Nutrient Salt in Lakes
Tatsuhiro Seki,Yuuichi Ishii,Toshio Ishii,Kazuo Taki 대한환경공학회 2009 Environmental Engineering Research Vol.14 No.4
The water quality in eutrophic lakes is affected by serious problems, such as abnormal increasing of Cyanobacteria. The purpose of this study was to investigate the possibility of a modified flotation system using a hybrid technique formed by chemical compounds and an electrostatic bridge. Therefore, experiments using the hybrid technique were performed to measure the zeta potential value on the phytoplankton surface and the removal efficiencies of phytoplankton, ammonia nitrogen, nitrate nitrogen and phosphoric acid. The results were as follows: Firstly, the zeta potential of M.aeruginosa was observed to approach charge neutralization due to adhesion of magnesium hydroxide precipitate on the phytoplankton surface in the pH range 10.5 to 11. Secondly, the concentration of chlorophyll-a decreased from about 150 to 20 μg/L, with a maximum removal efficiency of 84% due to coagulation with pH values higher than 10. Thirdly, the NH₄-N concentration was observed to decrease from 0.62 to 0.54 mg-N/L (13%), and the PO₄-P concentration, which is a limiting factor to the formation of algae blooms, decreased from 0.27 to 0.02 mg-P/L (92%). These findings suggest that the modified flotation system can be applied for the purification of the raw water of numerous lakes containing high phytoplankton populations and elevated pH.
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포메라니안의 성장호르몬 반응성탈모증에 대한 사람성장호르몬 및 mitotane(op'-DDD, Lysodren)에 의한 치료증례
志尾大一(Daiichi SHIO),? 雅之(Masayuki SEKI),久万美千代(Michiyo KUMAN),神?雅巳(Masami KOUNOSE),荒井延明(Nobuaki ARAI),藤川一人(Kazuhito FUJIKAWA),山形洋之(Kiroyuki YAMAGATA),棚田敦司(Atsushi TANADA),永井辰弘(Tatsuhiro NAGAI),中山洋治(Youj 로얄에이알씨 주식회사 2004 로얄동물임상의학 Vol.2 No.1
양측성(兩側性), 대측성탈모(對側性脫毛)와 색소과잉(色素過剩)을 나타낸 2두의 거세(去勢)한 수컷의 포메라니안이 내원하였다. ACTH부하시험(負荷試驗), 저용량(低用量) Dexamethasone억제시험 및 성장호르몬(GH) 응답성시험(Xylazine자극시험)에 의하여 GH반응성탈모증(反應性脫毛症)으로 진단하고 사람GH제제(製劑) 0.1 IU/㎏를 1주일간에 2회씩 근육 내에 투여하고 6주일 동안 치료를 하였다. 증례 1은 치유되었으나 1년 후에 재발하였고, 증례 2는 반응성이 미약하였기 때문에, 이 두 증례에 대하여 mitotane(op'-DDD, Lysodren)를 투여 하였던 바, 증례 1은 치유되고 증례 2에서는 피모(被毛)의 개선이 인정되었다. 포메라니안 종은 유전적으로 부신(副賢)에 있어서의 특정의 수산화효소가 결여(缺如)되어 있다는 것이 밝혀져 잠재적(潛在的)으로 고(高)프로게스테론, 고(高)안드로겐 증을 가지고 있다는 것이 보고 되어있다. 따라서 포메라니안 종에서는 고(高)코르티솔혈증을 나타내지 않고 부신피질의 과형성(過形成)을 일으키고 있는 것으로 생각된다. 부신피질을 선택적으로 파괴하는 작용을 가지는 Mitotane이 GH반응성탈모증에 유효하였기에 본 질환과 부신이 더욱 강하게 연관지어졌다. Two castrated male Pomeranians, having bilateral, symmetrical alopecia and hyperpigmentation, were diagnosed as growth hormone (GH) responsive dermatopathy by ACTH stimulation test, low dose dexamethasone suppression test and GH reactive test (xylazine response test). They were teated twice a week for six weeks by injecting 0.1 IU/㎏ of GH preparation into the muscle. Case 1 dog showed a significant recovery, but relapse occured after one year. Case 2 dog showed a low reactivity to it. Therefore both of them were treated with mitotane (op'-DDD, Lysodren®). Case 1 dog recovered and case 2 dog improved in coat. It is reported that Pomeranians hereditatily lacks in a specific hydroxylase activity and have potential hyperpogesteronemia and hyper-androgenemia. It is suggested that Pomeranians overproduce the adrenal cortex without showing hypercortisonemia. This result, that mitotane, as a seletive disintegrator of adrenal cortex, is efficacious against GH responsive dermatosis and give another support to the view that the disease is related with the function of adrenal cortex.
ScienceON
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