• Tuberculosis and Respiratory Diseases
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• 제78권4호
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• pp.356-359
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• 2015

Pneumothorax is an extremely rare complication of non-tuberculous mycobacterial infection. A 52-year-old man presenting with difficulty breathing and chest pain was admitted to our hospital. A right-sided pneumothorax was observed on chest radiography and chest computed tomography showed multiple cavitating and non-cavitating nodules with consolidation in the upper to middle lung zones bilaterally. Serial sputum cultures were positive for Mycobacterium kansasii, and he was diagnosed with pulmonary M. kansasii disease complicated by tension pneumothorax. After initiation of treatment including decortications and pleurodesis, the patient made a full recovery. We herein describe this patient's course in detail and review the current relevant literature.

• Molecules and Cells
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• 제44권2호
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• pp.68-78
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• 2021

Secondary metabolites enable plants to protect themselves from herbivorous insects. Among these, cucurbitacin B (cuc-B) is a bitter-tasting compound with promising pharmacological potential. Dietary exposure to cuc-B lowered the hemolymph glucose levels of Drosophila melanogaster fed with a high carbohydrate diet, which is homologous to high blood glucose in humans, and its effect was comparable to that of metformin, a well-known glucose-lowering drug. Furthermore, cuc-B reduced tissue sugar levels and glycogen levels, as well as triacylglycerol levels. Our results thus highlight the potential applicability of this compound to treat chronic metabolic diseases such as diabetes and obesity. Additionally, we analyzed sleep quality and taste-associative memory enhancement after cuc-B and metformin treatment. Both supplements increased nighttime bout length and metformin increased memory consolidation. Therefore, discarded shell of Cucurbitaceae could be processed into health supplements.

• 한국임상수의학회지
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• 제38권6호
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• pp.269-273
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• 2021

A dog was presented with a cough, dyspnea, nasal discharge, gagging, and exercise intolerance. The dog showed leukocytosis, peripheral eosinophilia, and an increase C-reactive protein. The radiographic findings noted bronchointerstitial infiltration, intrathoracic lymphadenopathy, and soft tissue opacity mass. Computed tomography findings showed thickening of the bronchus and bronchiole. Also, peri-bronchial consolidation and generalized intrathoracic lymphadenopathy was present. On blind bronchoalveolar lavage and pulmonary cytology, there were significantly increased eosinophils. Canine pulmonary respiratory pathogens from a real-time polymerase chain reaction analysis was negative. Consequently, the dog was diagnosed with eosinophilic bronchopneumopathy. Clinical signs improved significantly within a few days after treatment with an oral corticosteroid.

• 대한한의학원전학회지
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• 제12권1호
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• pp.113-138
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• 1999

Distension of hydrops is the pathosis that the hydration is retented in abdomen and that is caused by disturbance of hydrometabolism. Most of hydrops belongs to Consolidation. In part of OhRyungJinAek-Byeul of Youngchu"靈樞 五癃津液別", the general explanation of hydrops is briefed. But there was nothing about pathogenesis, pathology, symptoms and the method of treatment. The part SuChang of Youngchu "靈樞 水脹" divided it by Superficial-swelling, Hidden-swelling, Ovarian-hydrops, Stony-uterin-mass and explained it to cure by Category of pathology. So, the books JeByeongWonHuRon"諸病源候論" ChonGeumYoBang"千金要方", WoiDaeBiYo"外臺秘要", TaePyeungSeongHyeBang"太平聖惠方", BoJeBang"普濟方", EuiHakGangMok"醫學綱目", DongEuiBoGam"東醫寶鑑" etc. published later, show the method of treatments and medications with quotation the original text of this part. And it is convinced that more profound research of this part is inevitable to understand the correct meaning of hydrops that explained by many of ancient medical scholars, and to apply it to clinical medicine. There is an explanation on Distension hydrops in the prologue of this part. And t six kinds of disease in this part is simila to edema, so it is called SuChang"水脹", pathology of Edema. Superficial-swellin Hidden-Swelling is reported in the fir chapter, differential diagnosis of Ovarian-hydrops, Stony-uterin-mass is rep in the second chapter, and treatment Superficial swelling. Hidden Swelling reported in the third chapter. Briefly looking over that chapter, Distension of hydrops is recognized as stay of hydration at the abdomen as a result of disturbance of hydrometabolism and it says about symtoms, pathogenesis, pathology, differential diagnosis, treatment of Hydrops Superficial-swelling Hidden-swelling Ovarian-hydrops Stony-uterinmass. And it says about a few things that Superficial-swelling, Hidden-swelling could be differentiated by colors of skin and distension of abdomen, and Ovarian-hydrops, Stony-ulerin-mass could be differentiated that it occurs which sex and whether mensturation occurs or not, and treatment of Superficial-swelling, Hidden-swelling, Ovarian-hydrops.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2010년도 춘계학술발표대회
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• pp.6.2-6.2
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• 2010

Stainless steel is widely known to have superior corrosion properties. However, in some harsh conditions it still suffers various kinds of corrosions such as galvanic corrosion, pitting corrosion, intergranular corrosion, chloride stress corrosion cracking, and etc. For the corrosion protection of stainless steel, the ceramic coatings such as protective silica film can be used. The sol-gel coating technique for the silica film has been extensively studied especially because of the cost effectiveness. It has been proved that silica can improve the oxidation and the acidic corrosion resistance of metal surface in a wide range of temperatures due to its high heat and chemical resistance. However, in the sol-gel coating process there used to engage a heat treatment at an elevated temperature like $500^{\circ}C{\sim}600^{\circ}C$ where cracks in the silica film would be formed because of the thermal expansion mismatch with the metal. The cracks and pores of the film would deteriorate the corrosion resistance. When the heat treatment temperature is reduced while keeping the adhesion and the density of the film, it could possibly give the enhanced corrosion resistance. In this respect, inorganic protective silica film was tried on the surface of stainless steel using a sol-gel chemical route where silica nanoparticles, tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) were used. Silica nanoparticles with different sizes were mixed and then the film was deposited on the stainless steel substrate. It was intended by mixing the small and the large particles at the same time a sufficient consolidation of the film is possible because of the high surface activity of the small nanoparticles and a modest silica film is obtained with a low temperature heat treatment at as low as $200^{\circ}C$. The prepared film showed enhanced adhesion when compared with a silica film without nanoparticle addition. The films also showed improved protect ability against corrosion.

• 보존과학회지
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• 제27권4호
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• pp.357-369
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• 2011

봉암사 정진대사원오탑(보물 제171호)은 고려시대의 부도탑으로 장석 반정을 갖는 우백질화강암으로 구성되어 있다. 주요 조암광물은 조립과 세립의 석영, 장석, 운모 등이며, 부재는 암편탈락, 결실, 박리 및 박락 등의 물리적 풍화가 진행되어 있다. 이 탑의 전면에 걸쳐 적외선열화상분석을 실시한 결과, 균열이 발생한 부분을 중심으로 내부 박리 및 박락도 심한 것으로 나타났다. 표면 변색 부위에 대해 P-XRF 측정 결과, 암흑색, 황갈색 및 회백색 변색이 발생된 지점을 중심으로 Fe, S, Ca, Mn의 농도가 높게 나타났다. 또한 적색 안료의 피복흔적이 있는 부분은 Fe의 함량이 신선한 부분보다 5배 높게 측정되었으며, 적철석을 원료로 하는 안료를 사용한 것으로 해석된다. 부재의 초음파속도는 1,350~1,400 m/s로 모든 방위에서 유사한 값을 나타냈으나 박리, 박락 및 균열이 발생한 부분은 1,000m/s 이하의 값을 보였다. 따라서 풍화가 심해 물성이 약해진 부위와 균열대는 강화처리 및 재접합이 필요하며, 접합 부위가 넓은 암편은 강화처리를 선행해야 할 것으로 판단된다.

• 한국과학교육학회지
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• 제17권2호
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• pp.179-189
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• 1997

In this study, a conceptual change model for effective laboratories was developed and its instructional effect on students' achievement, the acquisition of scientific conceptions, and the attitudes toward science was investigated. Considering several conceptual change models in literature and Korean educational situations, the conceptual change model was developed. The model consists of 5 stages; preliminary, prediction, exploration, consolidation and reconstruction, and application. The treatment and control groups (2 classes) were selected from a middle school in Seoul, and taught about the changes of states, density, and dissolution for three weeks. Prior to instruction, the Group Assessment of Logical Thinking and the Learning Approach Questionnaire were administered, and their scores were used as covariate and / or blocking variable. To examine students' alternative conceptions before the instructions, a pre-conceptions test was also administered. After the instructions, students' achievement, the acquisition of scientific conceptions, and the attitudes toward science were measured with a researcher-made achievement test, a post-conceptions test, and the subtests of the Test of Science-Related Attitudes, respectively. The results indicated that the score of the treatment group was significantly higher than that of the control group in the post-conceptions test. The students in the treatment group had also less alternative conceptions than those in the control group. However, there were no significant differences for the achievement and the attitudes toward science. Educational implications are discussed.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.336-345
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• 2010

GS E&C was awarded the contract for the construction of Hanoi - Hai Phong Expressway Package EX-7 from Station Km 72+000 to Station Km 81+300 in December 2008. This project is the $7^{th}$ contract package of the 105.5 km long expressway near Hai Phong city, which includes a FCM-styled bridge along with high embankments over soft ground. For these high embankments, there is a need to treat the soft soil for improving the overall stability during construction and for reducing the post-construction settlement of the expressway. The Designer of this project had adopted four (4) different types of ground improvement techniques to treat the soft ground, including the prefabricated vertical drains (PVD), sand drains (SD), pack drains (PD, or sometimes called packed sand drains), and sand compaction piles (SCP). The main focus of soft soil treatment should be paid attention to the residual settlement after construction. In current design, however, it appeared that the secondary compression (or creep) of the improved soil layer and the consolidation settlement of the lower untreated compressible soil layer have been neglected in the estimation of the post-construction settlement. These uncalculated residual settlements may not only unsatisfy the design criteria but also raise serious problems during service period of this expressway. In this paper, the subsoil condition and current design were reviewed focusing on the employed soft soil treatment method and expected residual settlement.

• 한국분말재료학회지
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• 제15권1호
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• pp.23-30
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• 2008

Ni-20Cr-20Fe-5Nb alloy with or without $Y_2O_3$ was manufactured by mechanical alloying process and consolidated by spark plasma sintering (SPS). The grain size of the alloy with $Y_2O_3$ was smaller than that of alloy without $Y_2O_3$ which results from the effect of $Y_2O_3$ suppressing grain growth. The tensile strength at room temperature was increased by the addition of $Y_2O_3$ but decreased abruptly at temperature above $600^{\circ}C$. It seems to result from the change of deformation mechanism due to fine grain size, that is, grain boundary sliding is predominant at above $600^{\circ}C$ while internal dislocation movement is predominant at below $600^{\circ}C$. After conventional heat treatment process of solution treatment and aging, a small amount of ${\delta}(Ni_3Nb)$ phase was formed in Ni-20Cr-20Fe-5Nb alloy while a large amount of ${\gamma}"(Ni_3Nb)$ was formed in Inconel 718 in the previous report. This is due to exhaustion of Nb content by the formation of NbC during consolidation.

• 보존과학회지
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• 제19권
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• pp.73-84
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• 2006

충북 영동 영국사 대웅전 하부 토양층에서 출토된 탄화 목재의 현장 보존처리 방법을 개발하고자 하고자, 6가지 처리법을 실험한 결과 PEG#400 10%를 4일간 1일 1회씩 점적(dropping)한 후 PEG#4000 10%에서 40%까지 단계적으로 점적하는 방법이 좋은 치수안정성을 나타냈으며, 육안적으로 관찰했을 때도 갈라짐이 발생하지 않고 견고하였다. 이 방법을 건물 하부에서 출토된 주두로 보이는 탄화 건축부재 2점에 대해 현장에서 경화처리를 실시하였다. 현장에서의 시간 제약상 PEG#400 10%로 점적한 후 바로 PEG#4000 80%를 $85^{\circ}C$로 가열하여 다시 점적하였다. 경화 처리된 주두는 실험실로 운반하여 PEG#4000 80%($85^{\circ}C$)로 재처리한 결과 우수한 치수안정성을 보여주었다.