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상박신경총 차단에 있어서 Bupivacaine 의 용량 변화에 따른 임상적 고찰
김영대,이홍식,김필곤,엄인호,신건선 대한마취과학회 1989 Korean Journal of Anesthesiology Vol.22 No.4
Brachial plexus block is frequently used for surgery on the upper extremity. Unsuccessful brachial plexus block is usually caused either by injection outside the neurovascular sheath or by incomplete blockade inspite of injection within the neurovascular sheath. Studied by Winnie and Collines suggested that the extent of blockade following injection in the sheath surrounding the brachial plexus also should be directly proportional to the volume of local anesthetic injected. We therefore investigated the extent of blockade using different volume of bupivacaine with supraclavicular approach. The results were as follows. 1) Complete analgesia was observed between the group of 15 ml and 30 ml. 2) The interval of complaint of pain after a single injection ranged from 14.3 to 16.4 hours. Insignifi-cant difference was found between the group of 15 ml and 30 ml (p$gt; 0.1) 3) There was no hematoma, shivering, but there was Horner's syndrome in 13, phrenic N.paralysis in 2, pneumothorax in 1 cases. No general seizure or other side effects were observed. Therefore we come to the conclusion that above the volume of 15 ml is sufficient to brachial plexus block with supraclavicular approach.
한국산 해산 홍조류 긴잎돌김(Porphyra pseudolinearis Ueda)에서의 원형질체 분리
김영대,최재석,이주,손용수,홍용기,Kim, Young-Dae,Choi, Jae-Seok,Lee, Ju,Son, Yong-Soo,Hong, Yong-Ki 한국생명과학회 2003 생명과학회지 Vol.13 No.4
한국 동해안 특산종인 긴잎돌김의 원형질체 분리를 위한 적정한 조건을 구명하기 위한 연구가 이루어 졌다. 홍조류 긴잎돌김은 동해안에 있어 토착종이며 우점종중 하나이다. 원형질체는 2% agarase and 2% hemicellulase 의 효소를 이용하여 25mM Mes buffer, pH 6.0의 0.5M 솔비톨에서 분리되어 졌다. 분리되어진 원형질체는 PEG 8000에서 염색한 오카무라둥근돌김과 접합하였다. Optimal conditions of protoplast isolation from the seaweed Prophyra pseudolinearis have been described. The P. pseudolinearis is one of indigenous and dominant Porphyra species in the East Sea region. Protoplasts have been released by enzymatic treatment of 2% agarase and 2% hemicellulase in 25mM MES buffer, pH 6.0 containing 0.5 M sorbitol. The protoplasts could be fused with neutral red-stained protoplasts of P. okamurae by the addition of polyethylene glycol 8000 solution.
Tests of General Relativity at the Quantum Level
김영대 충북대학교 과학교육연구소 1986 과학교육연구논총 Vol.5 No.1
we consider three tests of general relativity at the quantum level. One of these is based on the observation that an effect of a gravitational field on a hydrogen atom is to admix states of opposite parity such as 2S½ and 2P½. This leads to circular polarization P_γ of emitted radiation which could be sufficiently large to be detected in white dwarfs or in certain binary systems. Since the magnitude of P_γ varies from theory to theory, it is possible that a study of this effect could provide a feasible means of testing general relativity at the guantum level.