• 제목/요약/키워드: absence

검색결과 6,473건 처리시간 0.028초

ON RIVLIN-ERICKSON ELASTICO-VISCOUS FLUID HEATED AND SOLUTED FROM BELOW IN THE PRESENCE OF COMPRESSIBILITY, ROTATION AND HALL CURRENTS

  • Gupta, Urvashi;Sharma, Gaurav
    • Journal of applied mathematics & informatics
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    • 제25권1_2호
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    • pp.51-66
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    • 2007
  • A layer of compressible, rotating, elastica-viscous fluid heated & soluted from below is considered in the presence of vertical magnetic field to include the effect of Hall currents. Dispersion relation governing the effect of viscoelasticity, salinity gradient, rotation, magnetic field and Hall currents is derived. For the case of stationary convection, the Rivlin-Erickson fluid behaves like an ordinary Newtonian fluid. The compressibility, stable solute gradient, rotation and magnetic field postpone the onset of thermosolutal instability whereas Hall currents are found to hasten the onset of thermosolutal instability in the absence of rotation. In the presence of rotation, Hall currents postpone/hasten the onset of instability depending upon the value of wavenumbers. Again, the dispersion relation is analyzed numerically & the results depicted graphically. The stable solute gradient and magnetic field (and corresponding Hall currents) introduce oscillatory modes in the system which were non-existent in their absence. The case of overstability is discussed & sufficient conditions for non-existence of overstability are derived.

폴란드 증후군 :1례 보고 (Poland`s syndrome: report of one case)

  • 박이태;홍장수;서경필
    • Journal of Chest Surgery
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    • 제14권1호
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    • pp.60-62
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    • 1981
  • The Poland`s syndrome is very rare anomaly, which consists of congenital unilateral absence of the sternocostal pert of the pectoralis major muscle, with ipsilateral hand deformities. The clinical features are variable but all patients have absence of at least the sternal head of the pectoralis major muscle. The syndrome is not hereditary and is of unknown origin. Early recognition of Poland`s syndrome may give the provision of psychological and genetic counseling for anxious parents. We have encountered a patient with this entity, who showed striking paradoxical movement of the left anterior Ghest wall and recurrent pneumonia, and underwent successful surgical correction.

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단순부분발작, 영아연축 및 결신발작으로 진단받은 소아간질(小兒癎疾) 3례에 대한 증례보고(證例報告) (A Case Report of Epileptic Children Diagnosed as Simple Partial Seizures, Infantile Spasms and Absence Seizures)

  • 강경하;박은정
    • 대한한방소아과학회지
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    • 제28권1호
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    • pp.61-70
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    • 2014
  • Objectives The purpose of this study is to report three cases of epileptic children who were treated by oriental medicine. Methods Three epileptic children were treated by Gwakhyangjeonggi-san and Kuibiondam-tang. Two children had took combination therapy; anti-epilepsy drugs and oriental medicines and the other one took only oriental medicines. We measured frequency and intensity of seizure, and observed general conditions. Results The oriental medicine treatment is not only reducing seizures, but also improving general condition like digestion, constipation and reducing frequency of common cold and symptom of rhinitis. Conclusions Epilepsy in childhood is induced by various factor like Fung (風), Dam (痰), Sik (食), Kyung (驚). We administrated oriental medicine and prevented seizures.

전자빔을 이용한 흐름반응기에서의 Trichloroethylene/Air 분해 (Decomposition of Trchloroethylene/Air Mixture by Electron Beam Irradiation in a Flow Reactor)

  • 원양수;한도홍;박완식;;이홍승
    • 한국대기환경학회지
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    • 제17권1호
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    • pp.97-104
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    • 2001
  • Decomposition of trichloroethlyene(TCE) in electron beam irradiation was examined on order to obtain information on the treatment of VOC in air. Air containing vaporized TCE has been studied in a flow reactor with different reaction environments, at various initial TCE concentration and in the presence and absence of water vapor. Maximum decomposition was observed in oxygen reaction environment and the degree of decomposition was about 99% at 20kGy for 2,000ppm initial TCE. The concentration of TCE exponentially decreased with dose in air and pure oxygen. The effect of water vapor on TCE decomposition efficiency was examined. The decomposition rate of TCE in the presence of water vapor (5,600 ppm) was approximately 10% higher than that in the absence of water vapor. Dichloroacetic acid, dichloroacethyl chloride and dichloroethyl ester acid were identified as primary products of this reaction adn were decomposed and oxidized to yield CO and $CO_2$. Perchloroethylene, hexachloroethane, chloroform and carbon tetrachloride were also observed as highly chlorinat-ed by products.

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Seminiferous Epithelium Cycle in the Korea Squirrel, Tamias sibiricus

  • Jung Tae-Dong;Lee Jung-Hun
    • 대한의생명과학회지
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    • 제10권3호
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    • pp.275-283
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    • 2004
  • The annual changes in testis weight and diameter of seminiferous tubules, and the seminiferous epithelium cycle of Tamias sibiricus were studied by light microscope. Testis weight and diameter of seminiferous tubule are significantly increased from January to July, and decreased rapidly to the size from August to December. Spermatogenesis occurs from January to July, and spermatocytogenesis are produced from August to December. The cycle of the seminiferous epithelium was divided into 12 stages during the development of spermatids as a changes of the nucleus and acrosomal structure, presence and/or absence of residual body, appearance and/or absence of sperm tail and meiotic figure and spermiation. The dark type spermatogonia (Ad) are appeared in all stages (I ~ XII), and the spermatids of step 10 are observed at I, II, X and XII stages. The spermatids of step 11 are appeared in III and IV stages, only the step 12 spermatid observed in V stage.

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Spontaneous Pneumocephalus Caused by Pneumococcal Meningitis

  • Kim, Hyun Sook;Kim, Seok Won;Kim, Sung Hoon
    • Journal of Korean Neurosurgical Society
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    • 제53권4호
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    • pp.249-251
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    • 2013
  • Pneumocephalus is a condition characterized by the presence of air in the cranium, and it is mainly caused by trauma or a neurosurgical procedure. In the absence of head trauma or a neurosurgical procedure, meningitis is an extremely rare cause of pneumocephalus. Here, the authors present a rare case of spontaneous pneumocephalus caused by pneumococcal meningitis, in which simple lateral radiography and computed tomography (CT) findings of the skull suggested the diagnosis. Cerebrospinal fluid analysis showed bacterial meningitis which later revealed streptococcus pneumonia. The patient was treated with antibiotics and responded remarkably well. Repeat CT performed after 2 weeks of treatment showed complete resolution of the intracranial gas. Here, the authors report an unusual case of a pneumocephalus caused by meningitis in the absence of head trauma or a neurosurgical procedure.

Indentation in the Right Ventricle by an Incomplete Pericardium on 3-Dimensional Reconstructed Computed Tomography

  • Kim, Hak Ju;Kwak, Jae Gun
    • Journal of Chest Surgery
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    • 제50권4호
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    • pp.298-299
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    • 2017
  • We report the case of a 17-year-old girl who presented with an indentation in the right ventricle caused by an incomplete pericardium on preoperative 3-dimensional reconstructed computed tomography. She was to undergo surgery for a partial atrioventricular septal defect and secundum atrial septal defect. Preoperative electrocardiography revealed occasional premature ventricular beats. We found the absence of the left side of the pericardium intraoperatively, and this absence caused strangulation of the diaphragmatic surface of the right ventricle. After correcting the lesion, the patient's rhythm disturbances improved.

Effect of Magnesium Sulfate on Product Inhibition of Sisomicin Production

  • Shin, Chul-Soo;Han, Sang-Hun
    • Journal of Microbiology and Biotechnology
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    • 제5권2호
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    • pp.96-99
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    • 1995
  • Addition of l00mM $MgSO_4$ to a cell culture after 54 hours resulted in a 2.4-fold increase in the sisomicin titre compared to a control to which no $MgSO_4$ was added, and a considerable amount of intracellular sisomicin was liberated outside the cells. The occurrence of product inhibition in fermentation was confirmed by a reduction in net sisomicin production with increasing amounts of added sisomicin without addition of $MgSO_4$. All added sisomicin was bound to sisomicin-free cells in the absence of $MgSO_4$, whereas approximately 40% of added sisomicin was bound with the addition of l00mM $MgSO_4$. Under conditions of no enzmye synthesis, maintained by adding chloramphenicol to exclude product repression, sisomicin was produced in the presence of 100 mM $MgSO_4$ but little sisomicin was produced in the absence of $MgSO_4$.

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