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다공성 폴리아크릴로니트릴/히드록시아파타이트 복합섬유의 중금속 흡착 특성
박두성,박재하,민병길,Park, Doo-Sung,Park, Jae-Ha,Min, Byung-Gil 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.1
Composite fibers of polyacrylonitrile (PAN) and hydroxyapatite (HAp) were prepared through a wet-spinning process for the purpose of using as a sorbent which can remove harmful cadmium ions from wastewater or food. HAp could be well immobilized in the PAN matrix in the fibers up to 50 wt%. Highly porous structure could be obtained by direct extrusion of the dope to water as coagulant resulting in density of the fibers lower to 0.38 g/$cm^3$. Thus radial pore channels were found to be well developed through the fiber, which is essential key-structure for the effective diffusion of metal ions from water-phase to inside of the fibers. The composite fibers showed maximum cadmium sorption amount of 12.3 mg per g of fiber and 30.7 mg per g of HAp.
후기발병 정신분열병 환자에서의 뇌자기공명촬영 소견에 관한 연구 : 조기발병 정신분열병, 진행성 정신분열병, 노인성 치매 및 대조군과의 비교
박두성,이영호,최영희,박영수,정영조,Park, Doo Sung,Lee, Young Ho,Choi, Young Hee,Park, Young Soo,Chung, Young Cho 대한생물정신의학회 1997 생물정신의학 Vol.4 No.1
With increasing tendency of incidence and interest for the late onset schzophrenia, concerns about whether this disorder is etiologically or phenomenogically distinctive entity or not have increased also. To clarify the disease entity of the late onset schzophrenia and the role of structural brain changes in its etiology, authors tried to prove following hypothesis : Are there any evidences of structural brain changes in the lateonset schizophrenia? ; If present, are they not different from those of the early-onset schizophrenia or progressive schizophrenia? ; And are they not different from those of senile dementia? Subjects were 6 patients with the late-onset schizophrenia, 6 patients with the early-onset schizophrenia, 6 patients with progressive schizophrenia, 6 patients with Alzheimer's dementia, and 6 controls. We measured regions of interest of the magnetic resonance images by computer assisted planimetry using the AutoCad and digitizer. Our study results may suggest that the third ventricular enlargement and a reversal of normal difference between left and right temporal lobe and left-right difference in posterior lateral ventricle are common brain pathology for all types of schizophrenia including the late onset schzophrenia. And also suggest that brain structural changes of the late onset schizophrenia are related with neurodevelopmental abnormality rather than degenerative change.