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심상일,김성학,박동빈,신규만 대한신경외과학회 1991 Journal of Korean neurosurgical society Vol.20 No.6
From January 1987 to December 1989, Six patients with lipomyelomeningocele were operated. There were 4 females and 2 males. The chief complaints that caused these patients to seek help were cosmetic effect of the mass on back, urinary incontinence, ankle deformity and weak leg. The postoperative results were as follows : Patient treated before developing neurological deficit remained unchanged neurologically. Patient treated after developing neurological deficit were left with neurological sequelae. lipomyelomeningoceles are serious lesion which recommand early prophylactic surgery.
실험적 뇌혈관연축에 대한 Nimodipine의 효과 : 전자현미경학적 고찰 Electron Microscopic Studies
심상일,신규만 대한신경외과학회 1990 Journal of Korean neurosurgical society Vol.19 No.8-9
In order to evaluate the effect on nimodipine on the cerebral vasospasm, twelve adult mongrel dogs were stuided in this experiment. This animals were divided into 2 groups ; Intracisternal injection of autogenous blood(Group Ⅰ : no treatment group) and intravenous nimodipine administration after intracisternal injection of autogenous blood(Group Ⅱ : treatment group). Nimodipine was administered 12 hours after intracisternal injection of autogenous blood for 7 days. Dogs were sacrificed at 8th day after intracisternal injection of autogenous blood and the ultrastructual changes were studied. The results were as follows : In Group Ⅰ basilar artery showed endothelial cell swelling with distruption of intercellular junction, subendothelial edema and thickening of the internal elastic lamina with marked edematous change. The pathologic changes of arteries in Group Ⅱ were considered more favorable than that of Group Ⅰ. These results suggest that early intravenous treatment with nimodipine is benifical in the treatment of vasospasm of this models.
심상철,임홍,Sang Chul Shim,Hong Lim 대한화학회 1975 대한화학회지 Vol.19 No.6
금속의 착물을 첨가제로 사용하여 햇빛에 의한 고분자 물질의 분해를 빠르게 하고자 하였다. 첨가제는 햇빛의 자외선에 의해 들뜬상태가 되어 공기중의 산소를 들뜬 단일상태로 만들어 준다. 들뜬 산소는 고분자의 골격에 카르보닐기나 히드록실기와 같은 작용기를 만들어 주며 동시에 골격을 끊어준다. 이러한 작용기는 미생물에 의해 공격받기 쉬우므로 고분자물질은 점점 저분자 물질로 되어 분해된다 적외선 스펙트럼으로 이러한 작용기들의 생성을 측정하였으며, 점성도의 측정과 비교하여 이러한 기들의 생성이 분자량의 감소와 비례함을 알았다. 첨가제의 종류를 바꾸어 가며 그 효과를 비교함으로써 350${\sim}$400nm의 자외선에서 센 charge-transfer band를 가지는 금속착물이 효과가 좋으며 특히 철의 디티오카르밤산 착물과 그와 유사한 구조의 착물이 좋은 효과를 보여줌을 알았다. The photodegradation of polystyrene and polyethylene was studied utilizing several additives to promote photooxidation. Polymer films with small amount of additives were irradiated with ultraviolet lamps in Rayonet Photochemical Reactor. The progress of photodegradation was followed by measuring the intensities of carbonyl and hydroxyl stretching bands in infrared spectra as well as the viscosity changes. It was found that the increase of carbonyl or hydroxyl peaks was proportional to the decrease of the molecular weight of polymers under study. Iron(II, III) complexes of dithiocarbamate and their analogs showed good results.
광 알킬화 반응에 의한 Aspartylphenylalanyl Methyl Ester의 합성
심상철,채규호,Sang Chul Shim,Kyu Ho Chae 대한화학회 1975 대한화학회지 Vol.19 No.5
N-X-glycylphenylalanine methyl ester(X-trifluoroacetyl or acetyl)의 글리신잔기를 광 알킬화 반응에 의해 aspartic acid 의 유도체로 전환하였다. 이 반응은 diacetyl/di-t-butyl peroxide(DBP)를 광 개시제로, acetic anhydride를 알킬화제로 하여 350nm 파장의 램프를 사용하므로써 일어난다. DBP와 acetic anhydride에 의한 열반응의 경우에도 같은 알킬화 반응을 관찰하였다. 이 열알킬화 반응은 자유라디칼 반응을 거쳐 일어나기 때문에 이와 비교하여 광 알킬화 반응도 자유라디칼 메카니즘에 의해 일어난 것으로 추측된다. Glycine residue in N-X-glycylphenylalanine methyl ester(X = trifluoroacetyl or acetyl) was converted into aspartic acid derivative by a photoalkylation reaction. The reaction was induced with 350 nm lamp using a combination of diacetyl/di-t-butyl peroxide (DBP) as the photoinitiator, and acetic anhydride as the alkylating agent. In the thermal reaction with DBP and acetic anhydride, the same alkylation reaction of the dipeptide was observed. From this thermal alkylation reaction the photoalkylation reaction is also thought to undergo via free radical mechanism.