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카드뮴 독성에 대한 Metallothionein의 보호 작용
이샛별,김완종 순천향대학교 기초과학연구소 2005 순천향자연과학연구 논문집 Vol.11 No.1
The protective roles of metallothionein(MT) exogeneously adiministered have been examined in the liver and kidney of cadmium(Cd) treated mouse, In Cd treated mouse, cellular damages such as nuclear pyknosis and necrosis were observed, Increased intercellular spaces and obscure liver lobules were often observed. The extent of damages of liver cells in Cd-MT treated group decreased compared with Cd treated group. And also, MT reactivity of this group was prominent in nuclei and cytoplasm. The enzyme activities of ALT and AST showed less alterations in CchMT treated group. In the case of kidney, protective effects of MT against Cd toxicity were comparatively not clear, In conclusion, these experimental results suggest that metallothionein reduces cellular damages resulted from cadmium in the liver of mouse.
정샛별,이긍호,최영철 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.3
치과의사는 자폐인의 치료시 자폐증의 정도와 의학적 관리가 필수적인 질환, 내과적 병력 , 또는 현재 환자가 복용하고 있는 약물등을 고려하여 이에 따라 적절한 행동조절 방법을 선택하여야 한다. 행동조절 방법의 선택시 술자가 선호하는 방법을 우선 하기보다는 환자의 상태와 치과치료시 환자와 보호자가 받는 스트레스를 최우선으로 고려하는 것이 필요하다. 환자의 현증에 대한 적절한 행동 조절하의 치과치료도 중요하지만, 그보다 더 중요한 것은 환자가 거부감을 느끼지 않고 치과에 내원할수 있도록 훈련시키는 것과 지속적인 구강위생 관리이므로 보호자를 위한 구강위생 관리교육 및 주기적인 내원에 의한 관리가 필요하다고 생각된다. The autism is a complex disorder, characterized language impairment, perceptual-motor difficulties, and social disturbance. The autistic children have hyperactivity, lack of cooperation, inappropriate patient/dentist interaction, so they require pro fessionally recognized behavioral management technique during dental treatment such as behavior modification, pharmacological agents, and general anesthesia. A behavior management technique can be chosen by factors such as the severity of autism possible accompanying disabilities, degree of cooperation, oral and general conditions of children. A non-pharmacological behavior modification may be selected for the autistic children who are able to communicate with dentist with mild dental caries, without compromised medical history. In case of excessively hyperactive, destructive, antisocial, and/or severe communicative disorder, a sedation technic with chloral hydrate, antisocial, and/or severe communicative disorder, a sedation technic with chloral hydrate, hydroxyzine, midazolam or nitrous oxide gas might to be performed. General anesthesia is preferred for severe communicative and/or behavioral disorder, elder age, excessive dental care need, and living a remote area.
Dehydration of D-xylose into furfural over H-zeolites
Saet Byul Kim,박은덕,Su Jin You,김용태,SangMin Lee,Hyokyu Lee,Kihyun Park 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.3
The liquid-phase dehydration of D-xylose into furfural was carried out over various H-zeolites-H-ferrierite,H-β, H-ZSM-5, H-Y and H-mordenite-with various SiO_2/Al_2O_3 molar ratios in different solvent systems: water, dimethyl sulfoxide (DMSO) and a mixture of water and toluene (water/toluene). For comparison, γ-Al_2O-3 and silica-alumina were also examined. FT-IR spectroscopy after pyridine adsorption was conducted to probe the acidity of the H-zeolites. The D-xylose conversion and furfural yield generally decreased with increasing SiO_2/Al_2O_3 molar ratio over the Hzeolites having the same crystal structure irrespective of the kind of solvent system. This is closely related to the accessible acid sites. In a comparison study using the three different solvent systems, the D-xylose conversion and furfural selectivity generally decreased in the following order: water/toluene>DMSO>water. In water and water/toluene, H-β(25) showed the highest furfural selectivity at a similar D-xylose conversion among the tested zeolites. On the other hand, H-mordenite (20) showed the highest furfural selectivity at a similar D-xylose conversion in DMSO.