• Journal of Chest Surgery
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• v.32 no.3
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• pp.326-329
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• 1999

Pulmonary lymphangioleiomyomatosis is a rare disease occurring almost exclusively in woman of reproductive age. It is characterized by rapid deterioration of respiratory functions and results in death within an average of 10 years. This disease is caused by a progressive proliferation of atypical smooth muscle in the pulmonary lymphatic vessels, blood vessels, and airways leading to the development of distal cystic changes which causes frequent recurrent pneumothoraces. We experienced a case of pulmonary lymphangioleiomyomatosis in a 30-year old woman who had a history of bilateral, recurrent pneumothoraces. The patient underwent lung biopsy through right thoracotomy which revealed the diagnosis of pulmonary lymphangioleiomyomatosis. We report a case with a review of the literature.

• Journal of the Korean Wood Science and Technology
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• v.30 no.4
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• pp.23-26
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• 2002

The generation of wastewood is currently about 40% level of the amount of domestic wood use. When the rate of wood self-supply is considered, the recycling of wastewood in wood panel products industry should be encouraged. This study was evaluated the performance of particleboard (PB) made from wastewood. PBs were manufactured with the synthesized urea-formaldehyde resin at 5 minutes hot-press time, and at 162℃ press temperature with 6 percent resin solids level on an ovendry wastewood particle weight basis. The PBs were tested by the procedure of ASTM D 1037. Test results exceeded the minimum strength requirement according to KS F 3104 Particleboard type 8.0. The PB's performance showed that wastewood is suitable raw material for PB.

• Resources Recycling
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• v.33 no.1
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• pp.3-14
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• 2024

Owing to technological advancements and energy-saving policies, the demand for LED is increasing, leading to rapid industry expansion. Consequently, efficient recycling of accumulated LED waste has become a growing social concern, and current recycling status of LED waste resources and future directions were reviewed. Currently, waste LED recycling is focused on Ga recovery. Therefore, the development of integrated recycling technologies such as pre-treatment and concentration/recovery of high valued materials is necessary. In this study, we investigated the status and recycling technologies of waste LED and presented prospects.

• Journal of the Korea Organic Resources Recycling Association
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• v.18 no.4
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• pp.38-44
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• 2010

Foundry sands are made up of silica and some coking agents, such as bentonite or resin, and used as templates for the production of various casting products. Foundry sands, which are repeatedly used, were finally transformed into the waste materials by heat, losing their proper functions. The used foundry sands have been treated as general wastes according to the contents of coking agents used. Silica, however, can be recycled through the proper treatment due to its physical property not to changed by heat. In this study, we have identified and investigated at the occurrence, treatment and recycling status of the used foundry sands, as well as for the regime and inhibitory factors of the recycling of them in domestic and foreign cases.

• Radiation Oncology Journal
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• v.10 no.1
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• pp.1-6
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• 1992

The usefulness of hyperthermia for cancer therapy has been established. The purpose of the present investigation was to access feasibility of heating normal lung and the temperature and power requirement were compared with that for liver as solid organ in rabbits by using radiofrequent heating machine. In this study, 20 rabbits were divided into 2 groups according to the heating site and the method of temperature measurement; in group I : lung heating and temperature measuring in skin, esophagus and lung parenchyme; in group II : liver heating and temperature measuring in skin and liver parenchyme. The results were as follows; 1) When the maximum temperature was almost same in lung heating group and liver heating group, the power for liver heating was lesser required than the power for lung heating (p<0.05). 2) The temperature of esophagus for the measurement of mediastinum temperature was $1.1{\pm}0.9^{\circ}C$ higher than the temperature of lung parenchyme (p<0.05). Therefore the above findings suggest lung, air containing organ, is well heated as same as liver, solid organ. So more active trials of lung heating in the lung cancer must be likely considered. But when the lung is heated, the esophageal temperature is higher than lung parenchyme, so the mediastinum damage must be considered seriously.

• Journal of Chest Surgery
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• v.43 no.4
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• pp.394-398
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• 2010

Background: The overexpression of transforming growth factor-beta 1 receptor II (TGF-${\beta}1$RII) and transforming growth factor-beta 1 (TGF-${\beta}1$) ligand may be involved in the formation of a bulla. In this study, we tested if serum TGF-${\beta}1$ ligand levels correlated with the expression level of TGF-${\beta}1$RII and TGF-${\beta}1$ in bullous tissues from patients with spontaneous pneumothorax. Material and Method: Bullous lung tissues and blood samples were obtained from 19 patients with spontaneous pneumothorax, 18 males and 1 female, aged 17 to 35 years old. The bullous tissues were obtained by video-assisted thoracic surgery (VATS), fixed in formalin, embedded in paraffin, and cut into $5{\sim}6{\mu}m$ thick slices. Sections were immunohistochemically stained with primary antibodies against TGF-${\beta}1$ or TGF-${\beta}1$RII, and serum levels of TGF-${\beta}1$ in patients and normal controls was measured by enzyme-linked immunosorbent assay (ELISA). Result: Of the 19 patients, 16 were TGF-${\beta}1$ positive and 10 were TGF-${\beta}1$RII positive. Among the 16 TGF-${\beta}1$ positives, 9 were also TGF-${\beta}1RII$ positive. As seen previously, strong immunohistochemical staining of TGF-${\beta}1$RII and TGF-${\beta}$ was detected in the boundary region between the bullous and normal lung tissues. Average TGF-${\beta}1$ blood levels of both TGF-${\beta}1$ and TGF-${\beta}1$RII positive patients was $38.36{\pm}16.2ng/mL$, and that of five controls was $54.06{\pm}15ng/mL$. Conclusion: These results suggest that overexpression of TGF-${\beta}1$ and TGF-${\beta}1$RII expression may be involved in the formation of bullae. TGF-${\beta}1$ blood levels in patients with primary spontaneous pneumothorax is lower than normal people, suggesting that the high level of local TGF-${\beta}1$ expression in the bullous tissue region, but not in the whole blood, may contribute more in the formation of bullae.

• Journal of the Korean Recycled Construction Resources Institute
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• v.7 no.4
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• pp.88-94
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• 2012

This study is conducted to utilize waste concrete powder made as a by-product manufacturing high quality recycled aggregate. The blaine fineness of the used waste concrete powder was 928 and $1,360cm^2/g$. As the main characteristic of waste concrete powder, it showed an angular type similar to cement, but hydrated products were attached on the surface of particles. In addition, the size of the particles of waste concrete powder was larger than OPC and in terms of chemical components it had higher $SiO_2$ contents. The viscosity of the paste that mixed waste concrete power decreased by 62% at the most, compared to the paste that only used OPC, and the final set time was delayed about two hours. As composition rates of waste concrete powder increased, the flow value decreased by 30% at the most according to the comparison with mortar that only used OPC, and sorptivity coefficients increased by 70%. The compressive strength of mortar decreased by 73% at the most as composition rates of waste concrete powder increased. According to the test results, it is desirable to use waste concrete powder by combining OPC appropriately(below 15%).

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.5 no.3
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• pp.257-265
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• 2007

Spent filter wastes of about 1,000 units (200 L) have been stored in the waste storage facility of the Korea Atomic Energy Research Institute since its operation. At the moment, to secure space in a waste storage facility as well as to efficiently manage spent filter wastes, it is necessary to conduct a compaction treatment of these spent filters, and finally, to repack the compacted spent filters into a 200 liter drum. To do that, the spent filter wastes were first classified according to their generation facilities, their generation date and their surface dose rate by investigating the inventory of the spent filters. In order to repack a compacted spent filter in a 200 liter drum, it is first necessary to conduct a radionuclide assessment of a spent filter before compacting it. Therefore, after taking a representative sample from a spent filter without a dismantlement, the nuclide analysis for it will be conducted. And then, after putting a spent filter into a regular drum by conducting the columnar shaping of the hexahedral form of a spent filter, the compaction treatment of the shaped spent filter will be conducted by vertically compacting it.

• Clinical and Experimental Pediatrics
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• v.45 no.4
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• pp.519-523
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• 2002

Purpose : We aimed to evaluate the abnormalities of chest radiographs including atelectasis in children who were admitted with bronchial asthma. Methods : We retrospectively analyzed the 357 chest radiographs and the clinical and laboratory features of the 144 children with asthma, who were admitted at Daejoen St. Mary's Hospital from April 1994 to May 1998. Results : Clinical and laboratory characteristics were as follows : male to female ratio, 2.1 : 1; mean age, 4.8 years of age; mean numbers of admission, 2.5; mean hospitalization, 5.0 days; mean IgE, 387 IU/mL; mean eosinophil count, $362/mm^3$. In the abnormal findings of the 357 radiographs, there were 314 cases(88.0%) of hyperinflation, pulmonary infiltration 35.0%, atelectasis 5.3% and pneumomediastinum 0.3%. All(19) cases of atelectasis were observed in the right lung field with mostly segmental and lobular distribution, except one with lobar involvement. Atelectasis was predominant in males and those under 2 years of age. There was a tendency that the right upper lung was more involved under two years while the right lower lung was more involved over seven years of age. Conclusion : Radiographs of children admitted to hospital with bronchial asthma showed abnormal findings including pneumonia or atelectasis(5.3%). These abnormal findings can help to determine other therapeutic modalities in addition to asthma treatment.

• Journal of agricultural medicine and community health
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• v.3 no.1
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• pp.5-9
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• 1978

이제까지 알려진 바에 의(依)하면 우리 나라에서 간(肝) 및 폐(肺)디스토마 분포양상(分布樣相)은 강원도지역(江原道地域)이 가장 저율(低率)로 나타난 것을 볼 수 있다. 그 이유(理由)로서는 이들 양흡충은 반드시 제(第)1 및 제(第)2중간숙주(中間宿主)를 통한 生活環(생활환)이 완성(完成)되어야만 하는데, 이들 중간숙주분포(中間宿主分布)가 강원도지역(江原道地域)이 낮은 까닭인듯 하다. 우연(偶然)한 기회(機會)에 저자(著者)는 강원도(江原道)의 일부지역(一部地域)은 폐(肺)디스토마의 감염(感染)이 적지 않다는 정보(情報)를 입수(入手)하고 이에 흥미(興味)를 갖게 되었으며, 특(特)히 농후감염지역(濃厚感染地域)으로 예상(豫想)되는 횡성군(橫城郡)의 일부지역(一部地域), 폐(肺), 청일면(廳日面) 신대리(里) 일대(一帶)와 서원면(面) 유현리(里)에서의 간(肝) 및 폐(肺)디스토마의 감염상(感染相)을 파악(把握)할 목적(目的)으로 본(本) 조사(調査)를 전도(全圖)하였다. 검사방법(檢査方法)으로는 일단(一旦) 간(肝) 및 폐(肺)디스토마의 VBS 항원(抗原)으로 피내반응검사(皮內反應檢査)를 실시(實施)하여 간(肝)디스토마 피내반응검사(皮內反應檢査)에 대(對)해서는 객담검사(喀痰檢査)와 면역혈청반응으로 보체결합반응(補體結合反應), 간접형광항체반응(間接螢光抗體反應) 및 Ouchterlony 반응(反應)을 하여 좀더 정확(正確)한 감염상황(感染狀況)을 파악(把握)하고저 하였다. 그 결과(結果)의 개요(槪要)는 아래와 같다. 1. 횡성군(橫城群) 신대리(里)와 우현리(里)의 주민(住民) 680명(名)에 대(對)한 폐(肺)디스토마의 VBS항원(抗原)에 의(依)한 피내반응양성율(皮內反應陽性率)은 12.4%이었고 간(肝)디스토마의 피내반응양성율(皮內反應陽性率)은 12.5%이었다. 2. 성별(性別)에 따른 피내반응양성율(皮內反應陽性率)의 차이(差異)는 간(肝)디스토마의 경우, 여자(女子) 7.4%에 비(比)하여 남자(男子)가 17.1%이었고, 폐(肺)디스토마의 경우는 여자(女子)가 20.7%인데 반(反)하여 남자(男子)가 42.9%로서 2배(倍) 이상(以上)의 고율(高率)이었다. 3. 연령별(年令別)로 보면, 간(肝)디스토마 피내반응양성율(皮內反應陽性率)은 31~40재(才)가 22.1%로 가장 고율(高率)이었고, 폐(肺)디스토마 양성율(陽性率)은 21~30재(才) 사이가 58.5%로서 가장 높았다. 4. 폐(肺)디스토마 피내반응양성자(皮內反應陽性者)에 대(對)하여 객담검사(喀痰檢査)를 실시(實施)한 바 105명(名) 중 11명(名)(10.5%)의 충란검출자(蟲卵檢出者)를 볼 수 있었다. 또 이들에 대(對)한 면역혈청반응(免疫血淸反應)으로 보체결합반응(補體結合反應), 간접형광항체반응(間接螢光抗體反應) 및 Ouchterlony 반응(反應)을 실시(實施)한 바, 각각 42.5%, 50.3% 및 45.8%로서 거의 일치(一致)된 성적(成績)을 나타내어 피내반응양성자(皮內反應陽性者)의 약반수(約半數)에서 이들 혈청반응(血淸反應)이 양성(陽性)으로 나타났다.