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불완전 균류 Aureobasdium pullulans으로 납을 제거하기 위한 인자들과 흡착모델
서정호,서명교,정경태,이용희,Suh, Jung-Ho,Suh, Myung-Gyo,Chung, Kyung-Tae,Lee, Yong-Hee 한국생명과학회 2006 생명과학회지 Vol.16 No.6
발효산업에 많이 사용되는 A. pullulans를 사용하여 독성 중금속인 납에 대한 제거량을 살펴보았다. 용액 중의 중금속을 제거할 때 A. pullulans가 다른 중금속에 비해 납에 대한 선택성이 우수하였으며 $40^{\circ}C$에서 최대 흡착량을 나타내었으며 또한 최적 pH가 9일 경우에 흡착량이 증가하였다. 초기납의 농도가 96 mg/l 인 경우에 단위 미생물당 흡착량이 120mg/g로 짧은 시간내에 많은 양의 납을 제거함을 알 수 있었다. 그리고 약 200 mg Pb/g cell dry weight 정도가 최대 납 흡착량인 것으로 나타났다. 그리고 미생물의 보존기간에 따라 세포외 고분자물질의 분비가 증가하여 납 흡착량을 증가시켰으며, Freundlich 모델에 잘 적용되었다. 그리고 살아있는 상태가 사멸된 상태에서 평형흡착량은 약 2배 정도 흡착능이 우수함을 알 수 있었으며, 그에 따라서 초기 흡착속도도 살아있는 상태가 사멸된 상태보다 훨씬 빠른 것을 알 수 있었다. An alternative method to remove and recover heavy metals is biosorption based on metal-sequestering properties of natural or biological origin. In this study, the effects of factors such as temperature, pH, initial concentration of lead, and initial amount of biomass on biosorption of lead using Aureobasdium pullulans were investigated. A. pullulans has an excellent selectivity to remove lead than other heavy metals such as cadmium, chromium, nickel in pure and mixed solution. The optimum temperature of biosorption with A. pullulans was $40^{\circ}C$ and the amount of removal increased at high pH. The higher initial lead concentration or the lower cell dry weight, the higher amount of lead was adsorbed. The adsorption isotherm of lead was accorded with Freundlich model. The adsorption capacity and initial adsorption rate of living A. pullulans were about twice higher than that of dead one.
서정호(Jung Ho Suh),서명교(Myung Gyo Suh),유일증(Il Zeung You),김석현(Seok Hyun Kim),박영식(Young Seek Park) 한국환경보건학회 1998 한국환경보건학회지 Vol.24 No.4
In recent years, waste heavy metals which have a reputation of detrimental effect on the en - vironment through the food chain are generated from mining, dyestuff, material, electric, and petroleum industries. In this study, the effect of heavy metals on human body and advantage or disadvantage of conventional technology for removal of heavy metals were reviewed, and biosorption process which have been deep studied recently was also investigated briefly. Conventional methods for removing heavy metals include chemical precipitation, electrolytic recovery, membrane technology, and ion exchange. These processes need to have pretreatment or aftertreatment, and may be ineffective or extremely expensive, especially when the concentration of heavy metals in solution are in the order of 1 to 100 mg/L. Biosorption process have lots of advantages in operating conditions and economical aspects and it is about to step into practical use in advanced states. The substances which have a capability to bind heavy metals are extracellular polymeric substances, cell wall, cell cytoplasm, and some excreta. The extracellular polymeric substances can be classified into proteins and polysaccharides excreted from microbial cells, and they may form complexation with heavy metals. The cell wall on the outside of the cytoplasmic membrane of the cell, determine the shape and the rigidity of the cell, have polysaccharides such as peptidoglycan and chitin, and bind with heavy metals well. It was reported that the organelles inside the cell membrane can sorb heavy metals too.
서정호 ( Jung Ho Suh ),김성배 ( Sung Bae Kim ) 대한내과학회 2010 대한내과학회지 Vol.79 No.3
In Korea, there are over 13,000 new breast cancer cases diagnosed annually. Early screening is crucial in reducing breast cancer mortality. Mammography is known to be the standard method of early screening for breast cancer. With increased awareness of the signs and symptoms of breast cancer and the use of screening mammograms, breast cancers are increasingly being diagnosed at earlier stages. Korean national health screening program recommends women aged 40 years or older should receive mammography every 1~2 years with breast self examination and clinical breast examination. And breast sonography and MRI have been added in screening. The screening guidelines for the breast cancer are continually changing. These guidelines are modified according to risk factors. Here, we investigated what are current evidence-based screening methods for breast cancer. (Korean J Med 79:237-240, 2010)
작품논문 : 화예작품 새로운 꽃밭에 대한 표현 방법 연구
서정호 ( Jung Ho Suh ),김성실 ( Sung Sil Kim ),신영주 ( Young Ju Shin ) 한국화예디자인학회 2006 한국화예디자인학 연구 Vol.14 No.-
In this present time that new and various methodology in flower work expression is proposed, I intend to study methodology of flower work expression to have the starting point of flowering artist.
만성 두부외상 환자에서 99mTc - HMPAO Brain SPECT의 임상적 유용성
서정호(Jung Ho Suh),김동익(Dong Ik Kim),정태섭(Tae Sub Chung),이종두(Jong Doo Lee),박창윤(Chang Yoon Park),정진일(Jin Ill Chung),김영수(Young Soo Kim) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.1
N/A Minima1 deterioration of cerebral perfusion or microanatomical changes were undetectable on conventional Brain CT or MRI. So evaluation of focal functional changes of the brain parenchyme is essential in chronic head injury patients, who did not show focal anatomical changes on these radiological studies. However, the patients who had longstanding neurologic sequelae following head injury, there had been no available imaging modalities for evaluating these patients precisely. Therefore we tried to detect the focal functional changes on the brain parenchyme using Tc-99m-HMPAO Brain SPECT on the patients of chronic head injuries. Twenty three patients who had suffered from headache, memory dysfunction, personality change and insomnia lasting more than six months following head injury were included in our cases, which showed no anatomical abnormalities on Brain CT or MRI. At first they underwent psychological test whether the symptoms were organic or not. Also we were able to evaluate the cerebral perfusion changes with Tc-99m-HMPAO Brain SPECT in 22 patients among the 23, which five patients were focal and 17 patients were nonfocally diffuse perfusion changes. Thus we can predict the perfusion changes such as local vascular deterioration or functional defects using Tc-99m-HMPAO Brain SPECT in the patients who had suffered from post-traumatic sequelae, which changes were undetectable on Brain CT or MRI.