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김일섭,한정현,문상흡 ( Il Sup Kim,Jeong Hyun Han,Sang Heup Moon ) 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.4
Ni-W hydrotreating catalysts for heavy-oil refinement have been studied for their deactivation and regeneration properties. The catalysts were found to be deactivated by surface accumulation of Si, V, S, and C components and by the resulting pore blockage. Temperature-programmed oxidation(TPO) of the deactivated catalysts showed that three kinds of the sulfur and one kind of the carbon species with different oxidation activity existed on the catalyst surface. The S and C species were removed in two steps during oxidation in a dilute oxygen stream at 450℃, i.e., a rapid removal during the initial 1 hour and a slow and steady removal thereafter. The surface species were removed more easily when the oxygen content in the regeneration stream was 0.05 atm instead of 0.13 atm. The activity of the regenerated catalyst in propylene hydrogenation was also higher when the regeneration gas stream contained less amount of oxygen, in accordance with the result of surface species removal. The activity difference was small between the two catalysts regenerated for either 1 hour or 7 hours because most of the surface species were removed during the initial 1 hour. Physical properties of the regenerated catalysts such as the BET surface area, the pore volume, the average pore diameter and the pore size distribution were correlated with the extent of the activity recovery.
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김일섭,Kim, Il-Seop 한국정보보호진흥원 2009 정보보호뉴스 Vol.136 No.-
금년 들어 미국의 신용카드 결제처리업체인 하트랜드 시스템즈(Heartland Payment Systems)에서 사상 최악의 신용카드 정보 유출 사건이 발생했으며, 이로 인한 금융 피해금액이 수억 달러에 이를 것으로 추산되고 있다. 이 회사는 매달 1억건에 달하는 신용카드 거래를 처리한다고 하니 그 유출된 개인 금융정보의 양은 상상을 초월할 것으로 보인다. 이렇게 유출된 정보는 카드복제, 신용도용 등 쉽게 예상할 수 있는 범죄 이외에도 어떠한 형태의 범죄로 당사자들에게 피해가 되돌아 올 지는 가늠하기 어렵다. 최근 국내에서 발생한 일련의 개인정보 유출사건과 마찬가지로 정보화와 개인정보보호 문제에 경종을 울리는 또 하나의 사건이라 하겠다.
김일섭,이형진,이진석,양지호,이일우,강준기,Kim, Il-Sup,Lee, Hyung-Jin,Lee, Jin-Suck,Yang, Ji-Ho,Lee, Il-Woo,Kang, Joon-Ki 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.1
The authors report a 42-year-old woman presented with a falx meningioma with disproportionately severe peritumoral edema. Histological examination including immunohistochemical staining resulted in the diagnosis of secretory meningioma. In addition to tumor size, edema could not be explained by location, growth rate, vascular involvement, or other factors. We conclude that secretory meningiomas may possess an innate ability to cause brain edema.
고온내성 연료용 알코올 효모균주 Saccharomyces cerevisiae KNU5377에서 HSF1 유전자의 변이주 구축
김일섭,윤혜선,최혜진,손호용,유춘발,김종국,진익렬,Kim Il-Sup,Yun Hae-Sun,Choi Hye-Jin,Sohn Ho-Yong,Yu Choon-Bal,Kim Jong-Guk,Jin Ing-Nyol Korean Society of Life Science 2006 생명과학회지 Vol.16 No.3
출아효모인 Sacharomyces cerevisiae S288C균주를 이용한 효모의 게놈이 완성된 후 S. cerevisiae는 다양한 연구 모델로 이용되어져 왔다. 현재까지 효모를 이용한 기능 유전체학 측면에서의 연구는 laboratory strainin인 S288C 균주 또는 그 유래의 균주들이다. 그러나 자연에서 분리된 효모 또는 산업적으로 이용되어지고 있는 S. cerevisiae의 유전학 측면에서의 연구는 낮은 포자형성률 및 형질전환률, 그리고 S288C 균주와의 게놈상의 상이성 때문에 거의 이루어지지 않고 있다. 여기서 우리 연구진은 자연에서 분리된 Saccharomyces cerevisiae KNU5377 균주를 이용하여 random spore analysis를 통해 MATa 및 $MAT{\alpha}$ 타입의 각각의 haploid cell을 분리 후 이미 보고된 KanMX module를 가지고 round PCR기법에 의한 short flanking homology 기법을 이용하여 전사조절인자인 HSF1 유전자가 치환된 변이주를 구축할 수 있었다. 덧붙여, 모든 유전자에 이 기법을 적용할 수는 없다는 것을 확인하였다. 앞으로 이 변이주를 통해 기능 유전체학적인 측면에서 이 유전자의 스트레스와의 관련성을 연구하고자 한다. HSF1 is the heat shock transcription factor in Saccharomyces cerevisiae. S. cerevisiae KNU5377 can ferment at high temperature such as $40^{\b{o}}C$. We have been the subjects of intense study because Hsf1p mediates gene expression not only to heat shock, but to a variety of cellular and environmental stress challenges. Basing these facts, we firstly tried to construct the hsf1 gene-deleted mutant. PCR-method for fast production of gene disruption cassette was introduced in a thermotolerant yeast S. cerevisiae KNU5377, which allowed the addition of short flanking homology region as short as 45 bp suffice to mediate homologous recombination to kanMX module. Such a cassette is composed of linking genomic DNA of target gene to the selectable marker kanMX4 that confers geneticin (G418) resistance in yeast. That module is extensively used for PCR-based gene replacement of target gene in the laboratory strains. We describe here the generation of hsf1 gene disruption construction using PCR product of selectable marker with primers that provide homology to the hsf1 gene following separation of haploid strain in wild type yeast S. cerevisiae KNU5377. Yeast deletion overview containing replace cassette module, deletion mutant construction and strain confirmation in this study used Saccharomyces Genome Deletion Project (http:://www-sequence.standard.edu/group/yeast_deletion_project). This mutant by genetic manipulation of wild type yeast KNU5377 strain will provide a good system for analyzing the research of the molecular biology underlying their physiology and metabolic process under fermentation and improvement of their fermentative properties.
김일섭,나형균,이경진,조경근,박성찬,박해관,조정기,강준기,최창락,Kim, Il Seub,Rha, Hyung Kyun,Lee, Kyung Jin,Cho, Kyung Keun,Park, Sung Chan,Park, Hae Kwan,Cho, Jeung Ki,Kang, Jun Ki,Choi, Chang Rhack 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.9
Objective : We analysed various surgical approaches and surgical results of 28 middle cranial base tumors for the purpose of selecting optimal surgical approach to the middle cranial base tumor. Methods : In this retrospective review, 28 patients, including 16 meningioma, 6 trigeminal neurinoma, 2 pituitary adenoma, 2 craniopharyngioma, 1 facial neurinoma, and 1 metastatic tumor, underwent surgical treatment using skull base technique. Of theses, 16 tumors were mainly confined to middle cranial fossae, 5 tumors with extension into both anterior and middle fossa, and 7 tumors with extension into both middle and posterior fossa. Tumors that confined to the middle cranial fossa or extended into the anterior cranial fossa were operated with modified pterional, orbitozygomatic or Dolen'c approach, and tumors that extended into the posterior cranial fossa were operated with anterior, posterior or combined transpetrosal approach. Completeness of tumor resection, surgical outcome, postoperative complication, and follow up result were studied. Results : Total tumor removal was achieved in 9 tumors of 10 tumors that did not extended to the cavernous sinus, and was achieved in 7 tumors of 8 tumors that extended to the lateral wall of the cavernous sinus. Of 10 tumors that extended to the venous channel of the cavernous sinus, only 2 were removed totally. Surgical outcome was excellent in 14 patients, good in 10, fair in 2 and poor in 2. There were no death in this series. Dumbell type tumor which extended into both middle and posterior fossae showed tendency of poor prognosis as compared with tumors that confined middle cranial fossa and extended into both anterior and middle cranial fossa. Postoperative dysfunctions were trieminal hypesthesia in 3, oculomotor nerve palsy in 2, abducens nerve palsy in 2, hemiparesis in 2, cerebellar sign in 1, facial palsy in 1 and hearing impairment in 1. Conclusion : Based on our findings and a review of the literature, we conclude that, when selecting the surgical approach to the middle cranial fossa tumors, the most important factors to be considered were exact location of the tumor mass and existence of the cavernous sinus invasion by tumor mass. We recommend modified pterional or orbitozygomatic approach in cases with tumors located anterior and middle cranial base, without cavernous sinus invasion. In cases with tumors invading into cavernous sinus, we recommend Dolen'c or orbitozygomatic approach. And in lateral wall mass and the cavernous sinus, it is preferred to approach the tumor extradurally. For the tumor involing with middle fossa and posterior fossa(dumbell type) a combined petrosal approach is necessary. In cases with cavernous sinus invasion and internal carotid artery encasement, we recommend subtotal resection of the tumor and radiation therapy to prevent permanent postoperative sequele.