• 제목/요약/키워드: E2HE2H

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Penicillium janthinellum 균체를 이용한 생물흡착에 의한 염료의 제거 (Removal of Dyes by the Biosorption Using Biomass of Penicillium janthinellum)

  • 이제혁;전억한
    • KSBB Journal
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    • 제14권1호
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    • pp.31-35
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    • 1999
  • Penicillium janthinellum의 생균체와 변형 균체를 사용한 azo와 reactive계 염료의 생흡착에 대한 연구가 수행되었다. 반응액의 pH가 초기 흡착율과 탈색에 영향을 주어, 최적 pH는 3.0이었으며, 최적 온도는 $40^{\circ}C$이었다. Reactive계 염료인 Apollocion Red 7EB와 Apollfix Red SF-3B와 Apollocion Red HE-3B는 각각 초기 흡착율이 0.06, 0.086, 0.07mg/g.mm이었다. Azo와 reactive 계 염료들을 함유한 혼합염료도Pen janthinellum 균체에 흡착되어 0.084mg/g.min의 초기 흡착율을 보였다. Detergent 첨가시 탈색 백분율과 초기 흡착율은 대조군의 경우보다 낮았다. 또한 이온의 첨가는 염료의 흡착율에 영향을 미치지 않았다 Pen janthinellum의 변형 균체도 염료의 흡착율을 보였고, Apollocion Red 7EB의 흡착에 있어 이온교환수지보다 월등한 흡착능을 보였다.

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다단계 흡착장치를 이용한 인공제오라이트 펠렛의 암모니아 제거 특성 (Ammonia Removal Characteristics of Artificial Zeolite Pellet Using Multi-Stage Adsorption Column)

  • 김완태;이성오;윤연흠;신방섭
    • 자원리싸이클링
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    • 제7권1호
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    • pp.20-26
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    • 1998
  • 본 연구에서는 석탄회로부터 물리화학적인 방법에 의해 제오라이트 펠렛을 제조하고 이를 이용하여 폐수중의 암모니아에 대한 흡착 제거능 및 그 제거 특성을 조사하였다. 암모니아 흡착 실험은 다단계 흡착방식으로 흡착용 시료는 본 실험에서 제조한 제오라이트 펠렛과 천연 제오라이트 2종을 흡착 제거에 대한 비교실험시료로 사용하였다. 흡착실험은 그 단계를 일정 시간동안에 흡착이 일어나기 시작하는 초기, 흡착이 진행되는 중기, 흡착이 종료되는 말기로 나누어 각 흡착의 단계 및 사용하는 컬럼의 수에 따른 흡착량의 변화 등을 조사하였다. 흡착이 종료된 후의 흡착 효율은 천연 제오라이트의 경우 64.5%와 78.5%였으며, 본 실험에서 제조한 제오라이트 펠렛은 80.5%로 다른 시료에 비해 많은 양의 암모니아를 흡착하였다. 처리수의 암모니아 농도에 따른 흡착량의 변화는 암모니아의 농도가 증가할수록 흡착량도 따라서 증가하였다. 처리수의 pH변화에 따른 흡착량의 변화는 pH가 산성영역에 서 보다는 중성이나 알칼리 영역에서 보다 많은 양의 암모니아를 흡착하는 경향을 보였다.

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Rice blast susceptible mutants of Taebaegbyeo and genes differentially expressed in he wild type rice.

  • Lee, C. H.;C. U. Han;K. S. Jang;Park, Y. H.;H. K. Lim;Kim, J.C.;Park, G. J.;J.S. Cha;Park, J. E.
    • 한국식물병리학회:학술대회논문집
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    • 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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    • pp.67.2-68
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    • 2003
  • A rice cultivar, Taebaegbyeo, is highly resistant to rice blast and moderately resistant to bacterial leaf blight (BLB) caused by Magnaporthe grisea and Xanthomonas oryzae pv. oryzae, respectively. To study the rice disease resistance mechanism, we generated rice deletion M3 mutants by gamma-ray irradiation. Blast and BLB responses of 16,000 M3 mutants were screened by inoculating mixtures of 4 races (KJ-201, H-1113a, KI-313, KI-409) of M. grisea and 3 Korean races of X. oryzae pv. oryzae. We selected so far 21 M3 mutants of Taebaegbyeo showing high susceptibility to the diseases. One of the mutants, KCT-6417, was susceptible to KI-1113a race of M. grisea, suggesting the deletion of a race-specific blast resistance gene in the mutant. To isolate rice genes involved in blast resistance and defense response, we take a PCR-based suppression subtractive hybridization approach using cDNAs of blast-inoculated wild type and the KCT-6417 as a tester and a driver, respectively. Genes specifically expressed in the wild type will be presented. The selected genes would give us a clue to understand mechanism for the race specific resistance and defense responses against M. grisea H-1113a in Taebaegbyeo.

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조기위암으로 위 절제술 후 갑자기 발생한 췌담도암으로 오인되었던 재발성 위암 1례 (Recurrent Early Gastric Cancer with Liver Metastasis Mimicking Pancreaticobiliary Cancer)

  • 이병후;조주영
    • Journal of Digestive Cancer Research
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    • 제1권1호
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    • pp.48-51
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    • 2013
  • 73세 남자 환자로 약 1개월 전부터 상복부 불편감 주소로 본원 내원 후 시행한 상부 내시경 검사상 하체부 전벽측의 조기위암으로 내시경 점막하 박리술을 시행하였다. 조직검사 결과 저분화도(poorly differentiated type)의 선암이 발견되었고, 절제면의 암세포 침범 소견은 없었으나, 점막하 2층(900 um)까지 침윤된 소견과 일부 림프선 전이 소견이 보여 위 절제 수술(subtotal gastrectomy)을 시행하였다. 조직검사 결과 점막층에 국한된 저분화도의 선암이 발견되었고, 그 외 림프절 전이 등의 소견은 보이지 않아 수술 후 병기 1기의 조기위암(T1N0M0, stage IA) 으로 진단 후 추가적인 항암치료 없이 추적관찰을 하였다. 이후 6개월 마다 복부 전산화단층촬영술과 상부 내시경 검사를 시행하였으며, 수술 후 2년째 시행한 복부 전산화단층촬영 결과 간의 다발성의 전이성암으로 의심되는 소견이 관찰되었다. 간 조직 검사를 시행하였고, 조직검사 결과 저분화도의 선암으로 발견되었으며, 원발 병소를 확인하기 위해 면역화학 검사를 시행한 결과 췌담도 계통의 암에서 특징적으로 보일 수 있는 CK7과 CK19이 강양성 소견을 보여 담도암의 간전이로 의심하였다. 이후 췌담도 MRI 및 PET 검사 등을 시행 하였으나, 담도암 등의 소견은 관찰되지 않았다. 위암은 특징적으로 발생 기전에서 다양한 내적 및 외적 원인들(nitrosamine, H. pylori, E-cadherin mutation 등)로 인해 면역 화학 조직검사 결과가 다양하게 나타날 수 있기 때문에(heterogeneous cytokeratin expression pattern) 면역화학 검사 결과만으로 위암 가능성을 배제할 수 없는 것으로 보고되고 있다. 따라서 위암의 간전이로 진단 후 항암치료를 시행하였으며, 면역화학 검사에서 췌담도 계통의 암으로 오인되었던 재발성 전이성 위암의 증례 1례를 문헌고찰과 함께 보고한다.

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Ion Beam Modified ppolyimide: A Study of the Irradiation Effect

  • Lee, Y.S.;Lim, K.Y.;Chung, Y.D.;Lee, K.M.;Choi, B.S.;Whang, C.N.
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 1998년도 제14회 학술발표회 논문개요집
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    • pp.132-132
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    • 1998
  • Ion bombardment in the keV range is known to induce drastic chemical modifications in organic and inoranic molecular comppounds. A degrading effects in orgainc materials such as the release of ppolymer compponents and the chemistry of the iradiation pprocess have been observed. The work to be described was carried out in order to understand the irradiation effect better. The sampple(ppolyimide : Kappton ) Were irradiated by Ar+, Ne+, H+ ions and electrons (3 keV) to fluence ranging from ~1$\times$1015 to ~1$\times$1017 ions/$cm^2$ at room tempperature. The impplant was usually rastered over an area of a few $cm^2$ . These ion impplantation were carried out in an electron sppectrometer ESCA 5700 (ppHI Ltd) at a residual gas ppressure of ~5$\times$10-10 Torr. X-ray pphotoelectron sppectroscoppy(XppS) measurements were made using a monochromatized Al Ka(1486.6 eV) excitation source. The pphotoemitted electrons were detected by hemisppherical analyser with a ppass energy of 23.5 eV. Core-level binding energies were referenced to the Fermi level. To avoid the charging effect it was used the neutralizer. We studied the irradiation effects on ppolyimide with Ar+, Ne+, He+ ions and electrons by XppS which 추 pprovide detailed information concerning the bonding-induced changes.

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Quantum Hall Effect of CVD Graphene

  • Kim, Young-Soo;Park, Su-Beom;Bae, Su-Kang;Choi, Kyoung-Jun;Park, Myung-Jin;Son, Su-Yeon;Lee, Bo-Ra;Kim, Dong-Sung;Hong, Byung-Hee
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2011년도 제40회 동계학술대회 초록집
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    • pp.454-454
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    • 2011
  • Graphene shows unusual electronic properties, such as carrier mobility as high as 10,000 $cm^2$/Vs at room temperature and quantum electronic transport, due to its electronic structure. Carrier mobility of graphene is ten times higher than that of Silicon device. On the one hand, quantum mechanical studies have continued on graphene. One of them is quantum Hall effect which is observed in graphene when high magnetic field is applied under low temperature. This is why two dimension electron gases can be formed on Graphene surface. Moreover, quantum Hall effect can be observed in room temperature under high magnetic field and shows fractional quantization values. Quantum Hall effect is important because quantized Hall resistances always have fundamental value of h/$e^2$ ~ 25,812 Ohm and it can confirm the quantum mechanical behaviors. The value of the quantized Hall resistance is extremely stable and reproducible. Therefore, it can be used for SI unit. We study to measure quantum Hall effect in CVD graphene. Graphene devices are made by using conventional E-beam lithography and RIE. We measure quantum Hall effect under high magnetic field at low temperature by using He4 gas closed loop cryostat.

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서울지하철 범죄 실태에 대한 범죄심리학적 연구 (Study on the Realities in Seoul Subway Crimes: Criminal Psychology)

  • 임상곤
    • 시큐리티연구
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    • 제7호
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    • pp.233-285
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    • 2004
  • ‘Defined legally as a violation of law' (Sutherland, E. H. Principles of Criminology, Lippincott, Chicago, 1939) Crime within the group is essentially and primarily antisocial in that the criminal who is welfare of his group acts instead against it and breaks the principles of social solidarity not merely by not doing what these principles prescribe, but by doing something exactly opposites. Any program set up to attack crime and delinquent behavior at their sources. A program of his nature needs the constant and comprehensive collaboration of psychiatrists, social works, educations, lawmakers, and public officials, since crime is a social problem and it should be treated as such. Some crime preventives which should be mentioned are as follows, (1) The insurance that every child will be decently born and that his home life be socially and economically adequate; without socially mature parents the chid is handicapped at the start; thus parental education, integrated with the public school system, should be developed now. (2) A more meaningful educational program which would emphasize ideals of citizenship, moral integrity, and respect for the law and the police. (3) A periodic check made for potential delinquents throughout the public schools and treatment provided if possible; and if not, proper segregation in institutions. (4) Careful attention paid to press, movies, and radio so that crime may no longer appear to be glamorous. This can be done by women's clubs, civic bodies, and other educational groups exerting pressure on the movie syndicates and broadcasting companies to free their productions of the tawdry and lurid characteristics of crime and criminals. Aggression associated with the phallic stage of development, The child ordinarily comprehends sexual intercourse as an aggressive and sadistic act on the part of the male, and specifically on the part of the penis. Evidence that the penis is phantasied as a weapon of violence and destruction come from unconscious productions of normal adults. Limerick, for instance, often refer to the penis as square, or too large, etc., so that intercourse is dangerous and painful for the partner, This may wall be a projection of the male's own fear of coitus. A certain portion of the death-instinct always remains within the person; it is called 'primal sadism' and according to Freud is identical with masochism. 'After the chief part of it(the death instinct) has been directed outwards towards objects, there remains as a residuum within the organism the true erotogenic masochism, which on the one hand becomes a component of the libido and on the other still has the subject itself for a object.' Criminalism, compulsive-neurotic frequent repetition of criminal acts in a compulsive manner. Like most symptoms of the compulsive-neurotic, such antisocial act are closely rated to feelings of hostility and aggression, often against the father. Because these acts are symptomatic, they afford only temporary relief and are therefore repeated. One patient with compulsive-neurotic criminalism was apprehended after breaking into hardware store and stealing money. He later confessed to many similar incidents over the preceding two years. At the same time it was apparent that he stole only for the sake of stealing. He did not need the money he thus obtained and had no special plans for using it.

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Dickite의 메카노케미칼 효과에 관한 연구 (A Study on the Mechanochemical Effects of Dickite)

  • 류호진
    • 한국재료학회지
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    • 제7권2호
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    • pp.152-156
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    • 1997
  • 본 논문은 분쇄한 dickite의 메카노케미칼 효과에 관해서 연구한 것이다. 유성밀을 사용하여 분쇄한 dickite의 메카노케미칼 효과를 알아보기 위하여, 분쇄시간을 달리하여 얻어진 dickite에 대하여 시차열분속과 X선 동경분포함수를 이용하여 정밀구조분석을 하였다. 분쇄한 dickite에 대하여 동경분포함수 해석 결과, $SiO_{4}$ 사면체는 분쇄한 dickite내에서 국소단위구조로 그대로 잔류하고 있었다. 한편 AI-O의 배위수 및 원자간 거리는 분쇄시간의 증가에 따라 점점 감소하였고, 이에 대한 정량화가 가능했다. 이는 시차열분석 결과의 AI주위의 환경변화와 일치하였다. 따라서, 분쇄함에 따른 dickite의 메카노케미칼 현상은 AI주위의 환경변화에 기인된 것으로 볼 수 있다.

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Ganglioside $G_{M1}$을 함유한 불포화 PE Immunoliposome의 제조와 특성 (Preparation and Characteristics of Unsaturated PE Immunoliposome Incorporated with Ganglioside $G_{M1}$)

  • 김창수;이은옥;김종득
    • Journal of Pharmaceutical Investigation
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    • 제21권3호
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    • pp.161-170
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    • 1991
  • The storage stabilities of immunoliposomes incorporated with variable amounts of ganglioside $G_{M1}$ were investigated as a function of time. temperature. and composition by observing absorbance of visible light and calcein release. In the column chromatographe, the layer of unsaturated PE(dioleoylphosphatidylethanolamine : DOPE). unable to form stable liposomes at physiological temperature and pH, were formed when palmitoyl-immunoglobulin G(IgG) $(2.5{\times}10^{-4}\;mol/DOPE\;mol)$ added. The incorporation of ganglioside $G_{M1}$ into immunoliposome. enhanced the stabilities of bilayers during the extended period of storage. The turbidities of immunoliposomes coated with ganglioside $G_{M1}$ exhibited the maximum near 20 mol% $G_{M1}/DOPE$ mol. probably because of the disturbance of the bilayer characteristics, i.e., layer transition or reorientation of interaction sites. At low temperature. the higher stability was achieved than at elevated temperatures. After one week of storage. the redispersed liposomal solutions at lower temperatures maintained the original elution patterns in chromatography but broader distribution at elevated temperatures. During the storage, it is suggested the aggregation is the more dominant phenomena for liposomes kept at $5^{\circ}C$ than the fusion. while he fusion is at elevated temperatures.

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비틀림 하중을 받는 얇은 빔의 동적 불안정성에 관한 연구 (Study on the Dynamic Torsional Instability of a Thin Beam)

  • 박진선;주재만;박철희
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 1995년도 추계학술대회논문집; 한국종합전시장, 24 Nov. 1995
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    • pp.185-190
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    • 1995
  • In recent years, many researcher have been interested in the stability of a thin beam. Among them, Pai and Nayfeh[1] had investigated the nonplanar motion of the cantilever beam under lateral base excitation and chaotic motion, but this study is associated with internal resonance, i.e. one to one resonance. Also Cusumano[2] had made an experiment on a thin beam, called Elastica, under bending loads. In this experiment, he had shown that there exists out-of-plane motion, involving the bending and the torsional mode. Pak et al.[3] verified the validity of Cusumano's experimental works theoretically and defined the existence of Non-Local Mode(NLM), which is came out due to the instability of torsional mode and the corresponding aspect of motions by using the Normal Modes. Lee[4] studied on a thin beam under bending loads and investigated the routes to chaos by using forcing amplitude as a control parameter. In this paper, we are interested in the motion of a thin beam under torsional loads. Here the form of force based on the natural forcing function is used. Consequently, it is found that small torsional loads result in instability and in case that the forcing amplitude is increasing gradually, the motion appears in the form of dynamic double potential well, finally leads to complex motion. This phenomenon is investigated through the poincare map and time response. We also check that Harmonic Balance Method(H.B.M.) is a suitable tool to calculate the bifurcated modes.

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