• 펄프종이기술
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• 제36권2호
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• pp.24-32
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• 2004

Toner used in xerographic printing process is hydrophobic powder with low surface energy. The toner ink film fused on paper surface can be efficiently detached from a fiber surface during pulping, but it does not fragment again into fine toner particles. Ink agglomerates that result have too large particle size to be deinked by flotation. The purpose of this study is to enhance toner agglomeration using 1-octadecanol for improving the toner removal by screening. The effect of pH, pulping temperature, and 1-octadecanol on toner agglomeration and removal by screening was investigated using image analysis methods. Results showed that the size of toner agglomerates increased substantially when pulping was carried out at high temperature under acidic condition. When toner agglomerates showed spherical shape, the particle removal efficiency of screening was improved.

• KSBB Journal
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• 제22권4호
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• pp.260-264
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• 2007

본 실험에서는 마이크로어레이 형태로 펩타이드와의 공유결합에 의한 고정화를 시키기 위해 유리 칩의 표면을 아민기에서 thiol기로 개질하였다. 펩타이드의 lysine기와 thiol기와의 공유결합반응에는 12시간 정도의 반응시간이 필요하였고 실온보다는 35$^{\circ}C$가 유리함을 확인하였다. Trypsin-FITC와의 반응을 통해 trypsin 결합부위를 가진 target 펩타이드가 control 펩타이드보다 더 높은 형광 신호를 나타냄을 확인하였고, 이를 통해 target 펩타이드를 마이크로어레이 상에서 식별할 수 있었다. 이 trypsin-FITC와의 결합 친화도 차이를 별도의 QCM 실험을 통해서도 확인하였다. 또한 작은 부피의 spot과 높은 농도의 펩타이드 용액이 더욱 높은 표면형광신호를 생성함을 확인하였다. 본 실험을 통해 펩타이드 마이크로어레이 칩 개발을 위한 기초 조건을 확립하였다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제27권4호
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• pp.51-60
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• 2021

Purpose: Tuberculosis(TB) care unit in public health center should be carefully considered to be re-designed as an infection safety environment for both patient and healthcare workers. So, for the enhancement, this study analyses the facility requirements for co-using the screening clinic as a TB and other respiratory disease care unit. Methods: Not only screening clinic facility guidelines from "A Study for Standard Triage Design and Construction Document" but also the guidelines of TB care and related medical facility are reviewed; KDCA, CDC, ECDC and WHO as a TB care, and FGI and NHS for facility. The facility requirements are summarized space, approach, and mechanical requirement in order. By comparing the summary and screening clinic facility guidelines, supplementations are proposed for TB care unit setting. Results: The result of this study shows that both the space program and mechanical requirement of the screening clinic and that of TB care unit are almost identical and could be share, which include direct airflow or negative air pressure in an exam room. To increase functional and economical efficiency, however, it is necessary to consider a multi-functional negative pressured room, So care process may be re-designed based on a room type; face-to-face room or glass wall inbetween. Implications: The facility guidelines for TB care unit of a public health center should be developed to build a safe environment for infection control by reflecting its medical plan and budget.

• 대한소아치과학회지
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• 제47권3호
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• pp.248-256
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• 2020

이 연구의 목적은 영유아구강검진의 효과를 치아우식 예방, 우식 치료행위, 치과진료비용이라는 다각적 관점에서 분석, 평가하는 것이다. 국민건강보험공단에서 제공하는 영유아검진코호트 데이터베이스를 활용하였고, 2008 - 2015년에 시행된 구강검진 1차 32,937건, 2차 22,608건, 3차 13,708건 및 2008년생과 2009년생 27,944명의 치과 진료 241,043건을 분석하였다. 2차와 3차 구강검진 결과를 통해 산출한 우식경험유치지수와 유치우식경험자율은 각각의 선행 구강검진 수검 횟수가 증가함에 따라 감소하였다. 유치의 급여 수복치료 및 치수치료, 유견치와 유구치의 조기 발치 시행 횟수는 구강검진 수검 횟수가 증가함에 따라 감소하였고, 전체 급여 치과진료비용 또한 수검 횟수가 증가함에 따라 감소하였다. 영유아구강검진은 치아우식을 예방하여 치아우식 관련 치료의 가능성을 줄이고, 따라서 치과진료비를 절감하는 효율적이고 경제적인 구강 건강 관리 방법이다.

• 비파괴검사학회지
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• 제34권4호
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• pp.299-304
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• 2014

본 연구에서는 적외선 열화상 카메라와 열원 사이에 유리를 설치하여 측정기기의 보호 및 온도 보정을 통하여 고온의 용접부 온도를 실시간으로 측정하고자 하였다. 먼저 할로겐램프의 열에 대한 온도 차이를 실시간으로 촬영하고 온도를 측정한 결과, 카메라와 열원 사이의 거리별 온도는 거의 동일하게 측정되었음을 확인할 수 있었고, 유리 두께와 측정 거리의 상관관계를 통하여 온도 범위를 예측할 수 있다는 것을 알 수 있었다. 이를 바탕으로 용접열원에 대한 실험을 수행하여 열화상 카메라를 이용한 용접부의 온도 측정의 타당성을 제시하였다.

• Journal of Korean Vacuum Science & Technology
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• 제3권1호
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• pp.79-84
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• 1999

the photolithographic patterning on an indium-tin oxide (ITO) glass and the electro-phoretic deposition were combined for preparing the screen of the full-color field emission display(FED). the patterns with a pixel of 400$\mu\textrm{m}$ on the ITO-glass were made by etching the ITO with well-prepared etchant consisting of HCL, H2O, and HNO3. Electrophoretic method was carried out in order to deposit each spherical red (R), green(G), and blue (B) phosphor on the patterned ITO-glass. The process parameters such as bias voltage, salt concentration, and deposition time were optimized to achieve clear boundaries. It was found that the etching process of ITO combined with electrophoretic method was cost-effective, provided distinct pattern, and even reduced process steps compared with conventional processes. The application of reverse bias to the dormant electrodes while depositing the phosphors on the stripe pattern was found to be very critical for preventing the cross-contamination of each phosphor in a pixel.

• Journal of Chest Surgery
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• 제54권5호
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• pp.338-341
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• 2021

As diagnoses of small ground glass nodule (GGN)-type lung adenocarcinoma are increasing due to the increasing frequency of computed tomography (CT) screening, surgical treatment for GGN-type lung adenocarcinoma has rapidly become more common. However, the appropriate surgical extent for these lesions remains unclear; therefore, several retrospective studies have been published and prospectively randomized controlled trials are being undertaken. This article takes a closer look at each clinical study. Convincing evidence must be published on 2 issues for sublobar resection to be accepted as a standard surgical option for GGN lung adenocarcinoma. In the absence of such evidence, it is better to perform lobar resection as long as the patient has sufficient lung function. The first issue is the definition of a sufficient resection margin, and the second is whether lymph node metastasis is conclusively ruled out before surgery. An additional issue is the need for an accurate calculation of the total size and solid size on CT. Given the results of clinical studies so far, wedge resection or segmentectomy shows a good prognosis for GGNs with a total size of 2 cm or less. Therefore, sublobar resection will play a key role even in patients who can tolerate lobectomy.

• Clinical Endoscopy
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• 제51권6호
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• pp.596-599
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• 2018

An 89-year-old man was referred to our hospital for treatment of hepatolithiasis causing recurrent cholangitis. He had undergone a prior Whipple procedure. Computed tomography demonstrated left-sided hepatolithiasis. First, we conducted peroral direct cholangioscopy (PDCS) using an ultraslim endoscope. Although PDCS was successfully conducted, it was unsuccessful in removing all the stones. The stones located in the B2 segment were difficult to remove because the endoscope could not be inserted deeply into this segment due to the small size of the intrahepatic bile duct. Next, we substituted the endoscope with an upper gastrointestinal endoscope. After positioning the endoscope, the SpyGlass digital system (SPY-DS) was successfully inserted deep into the B2 segment. Upon visualizing the residual stones, we conducted SPY-DS-guided electrohydraulic lithotripsy. The stones were disintegrated and completely removed. In cases of PDCS failure, a treatment strategy using the SPY-DS can be considered for patients with hepatolithiasis after a Whipple procedure.

• Journal of Chest Surgery
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• 제54권6호
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• pp.494-499
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• 2021

Background: A recent increase in the incidental detection of ground glass nodules (GGNs) has created a need for improved diagnostic accuracy in screening for malignancies. However, surgical diagnosis remains challenging, especially via video-assisted thoracoscopic surgery (VATS). Herein, we present the efficacy of a novel electrical navigation system for perioperative percutaneous transthoracic nodule localization. Methods: Eighteen patients with GGNs who underwent electromagnetic navigated percutaneous transthoracic needle localization (ETTNL), followed by 1-stage diagnostic wedge resections via VATS between January and December 2020, were included in the analysis. Data on patient characteristics, nodules, procedures, and pathological diagnoses were collected and retrospectively reviewed. Results: Of the 18 nodules, 17 were successfully localized. Nine nodules were pure GGNs, and the remaining 9 were part-solid GGNs. The median nodule size was 9.0 mm (range, 4.0-20.0 mm); and the median depth from the visceral pleura was 5.2 mm (range, 0.0-14.4 mm). The median procedure time was 10 minutes (range, 7-20 minutes). The final pathologic results showed benign lesions in 3 cases and malignant lesions in 15 cases. Conclusion: Perioperative ETTNL appears to be an effective method for the localization of GGNs, providing guidance for a 1-stage VATS procedure.

• Tuberculosis and Respiratory Diseases
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• 제81권2호
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• pp.156-162
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• 2018

Background: Eosinophilia is well recognized in specific conditions. The objective of the present study was to determine clinico-radiologic characteristics of eosinophilia and changes in prevalence over 10 years in recipients of private health screening program at a tertiary hospital in Korea. Methods: Data of private health screening program recipients at the health promotion center of Chung-Ang University Hospital from 2004 to 2013 were collected. Health-related questionnaires and laboratory findings of private health screening program with possible relation with eosinophilia were reviewed. Results of enzyme-linked immunosorbent assay (ELISA) for parasite, chest computed tomography, and pulmonary function test were also reviewed. Results: The cumulative prevalence of eosinophilia was 4.0% (1,963 of 48,928). Prevalence of eosinophilia showed a decreased trend from 2004 to 2013. Most cases (96.6%) had mild degree of eosinophilia. Eosinophilic subjects were older and male-predominant. They showed lower levels of forced expiratory volume in 1 second ($FEV_1%$), forced vital capacity (FVC%), and $FEV_1/FVC$ than those without eosinophilia. Eosinophilic subjects showed higher positive rate for common parasite in ELISA than those without eosinophilia. On radiologic findings, consolidation and ground glass opacities were positively associated with the degree of eosinophilia. When eosinophil was classified based on severity, statistically significant correlation between the severity of eosinophil and radiologic abnormalities was found. Conclusion: Eosinophilia is uncommon in healthy population. It usually occurs at a mild degree. Eosinophilic patients have more radiologic abnormalities compared to those without eosinophilia. Such radiologic abnormalities are associated with the severity of eosinophilia.