• 접착 및 계면
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• 제7권4호
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• pp.53-59
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• 2006

The paper highlights technical advances and introduces recent innovations such as smart curing laminating adhesives for flexible packaging with low migration rates of aromatic isocyanates and amines. Latent reactive one-part systems on the basis of surface deactivated solid isocyanates open up new dimensions for heat setting adhesives and waterborne PU dispersions. The new generation of Purmelt Micro Emission adhesives contains less than 0.1% of MDI monomer, thereby drastically reducing the emission of hazardous isocyanate vapors during processing and setting a significantly improved technical standard in occupational safety. Once again, polyurethane adhesives have demonstrated their unique ability to adapt to new process, product, safety and environmental requirements.

• 지능정보연구
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• 제16권3호
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• pp.37-54
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• 2010

정보의 수집, 기록, 처리, 저장을 하며 정보를 검색하고 제시해 주는 정보 시스템은 최근, 여러 방면에서 응용되어 인간의 여러 가지 활동을 지원하고 있다. 그런데, 현재의 정보 시스템은 일반적으로, 사용자의 명시적 제시에 대하여 시스템이 반응하고 정보를 제시하는 '반작용에 의한 소극적 모델(reactive model)'을 기반으로 하고 있다. 그러나 정보사회로 발전하기 위해서는 정보 시스템 자신이 자율적으로 인간의 행동이나 의도를 이해해, 거기에 기반을 두고 인간에게 지시나 정보 제공을 자발적으로 실시한다고 하는 '쌍방향의 동적 상호작용(mutual dynamic interaction)'이 필요하다. 따라서 본 논문에서는 정보시스템과 사용자의 '시선' 정보 기반의 쌍방향의 동적 상호작용을 통하여, 사용자의 '흥미' 라고 하는 심리적 상태를 추정하여, 보다 적절하고 효과적인 정보를 제공할 수 있는 주시 모방 모델 기반의 지능형 정보 시스템을 제안한다. 제안된 시스템은 의인 에이전트(avatar)를 이용하여 사용자의 주시 행동을 모방하는 것에 의해, 사용자와의 '공동 주의'를 실시하는 주시 모방(Gaze-Mirroring)이라는 방법을 도입하여, 시스템이 사용자의 잠재적인 흥미를 추정하고 추정된 결과에 따라 적절한 정보를 제시한다. 이와 같은 사용자의 시선정보를 이용한 주시 모방 모델 기반의 지능형 정보 시스템은 시스템의 적극적인 상호작용을 통한 새로운 상호작용 방법의 개발이 될 뿐만아니라, 사용자의 주시 정보를 통하여, 사용자의 잠재적 흥미를 표출함으로써, 사용자의 의도를 이해해, 사용자가 원하는 정보를 제시해 줄 수 있다.

• Journal of Microbiology
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• 제41권4호
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• pp.335-339
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• 2003

Many genetic variants of ${\alpha}_1$-antitrypsin have been associated with early onset emphysema and liver cirrhosis. However, the detailed structural basis of pathogenic ${\alpha}_1$-antitrypsin molecules is rarely known. Here we found that a recombinant $M_{malton}$ variant (Phe52-deleted) lost inhibitory activity by spontaneous conformational conversion into a more stable, inactive form under physiological conditions. Biochemical and spectroscopic data suggested that the variant converts into a reactive center loop-inserted conformation, resembling the latent form of plasminogen activator inhibitor-1.

• 대한임상검사과학회지
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• 제44권3호
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• pp.124-127
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• 2012

Syphilis is an infectious and sexually transmitted chronic disease caused by Treponema pallidum. On the basis of clinical findings, the disease has been divided into a series of overlapping stages, which are used to help guide treatment and follow-up. Persons who have syphilis might seek treatment for signs or symptoms of primary infection, secondary infection and tertiary infection. Latent infections are detected by serologic testing. A presumptive diagnosis of syphilis is possible with the use of two types of serologic tests: nontreponemal tests and treponemal tests assay. The use of only one type of serologic test is insufficient for diagnosis, because each type of test has limitations, including the possibility of false-positive test results in persons without syphilis. KFDA published Koreans guideline of Sexually transmitted infections in 2011. Two hundred samples were tested by RPR card test and Mediace RPR test with simultaneously. The agreement between RPR card test and Mediace RPR test was 95%, the discrepant samples was 5%. The characteristics of 10 discrepant samples was RPR card Positive and Mediace RPR negative nine samples, RPR card negative and Mediace RPR positive one sample. The nine samples were confirmed as FTA-ABS by KFDA guideline of syphilis test algorism, all IgM test was Negative, all IgG test was reactive. So, these cases were past or latent syphilis. The one sample was false-positive reaction.

• Journal of Yeungnam Medical Science
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• 제10권2호
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• pp.298-305
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• 1993

임신주령과 진통 및 분만의 진행정도에 따른 정상 임부의 혈청 CRP치의 동태를 파악하기 위해서 1992년 3월 1일 부터 1993년 8월 31일 까지 18개월간 영남대학교 의과대학 부속병원 산부인과에서 임신 20주에서 44주 사이의 건강한 임부 521명을 대상으로 혈청 CRP치를 측정하여 임신 주령과 진통의 유무, 양막의 파열여부 및 분만의 진행정도에 따라 비교 분석한 결과는 다음과 같다. 1. 혈청 CRP치 0.8mg/dl 이상과 2.0mg/dl 이상을 나타낸 임부의 빈도는 각각 12%(61/521)와 4%(22/521)이었다. 2. 임신주령 37주이하의 만삭전 임부군과 38주 이상의 만삭 임부군, 양막 파열 임부군과 비파열 임부군, 자궁경관 개대 3cm이하 임부군과 4cm 이상 임부군의 비교에서 혈청 CRP치 0.8mg/dl 이상과 2.0mg/dl 이상을 나타낸 임부의 빈도는 통계적으로 유의한 차이가 없었다. 3. 진통이 없는 임부군과 진통중인 임부군의 비교에서 혈청 CRP치 0.8mg/dl 이상을 나타낸 임부의 빈도는 각각 5.93%와 13.73%로 통계적으로 유의한 차이(p<0.05)가 있었으나 혈청 CRP치 2.0mg/dl 이상을 나타낸 임부의 빈도는 차이가 없었다. 4. 임신주령 37주 이하의 만삭전 임부군에서 혈청 CRP치 0.8mg/dl 이상을 나타낸 임부의 빈도는 진통중인 임부군이 23.64%로 진통이 없는 임부군의 4.69% 보다 현저히 높았으며(p<0.001), 혈청 CRP치 2.0mg/dl 이상을 나타낸 임부의 빈도도 진통중인 임부군과 진통이 없는 임부군이 각각 12.73%와 3.13%로 통계적으로 유의성 있는 차이(p<0.05)가 있었다. 임신주령 38주 이상의 만삭 임부군에서 진통이 없는 임부군과 진통중인 임부군을 비교하여 혈청 CRP치 0.8mg/dl 이상과 2.0mg/dl 이상을 나타낸 임부의 빈도는 통계적으로 유의성 있는 차이가 없었다. 이상 본 연구의 결과를 종합하면 임부의 감염을 조기 예측하는데 있어 기왕에 조기진통 임부에서 임상적 감염의 지표로 이용되고 있는 혈청 CRP치 2.0mg/dl은 진통중인 만삭임부에서도 양막파열 여부와 분만의 진행정도와 무관하게 유용한 것으로 추정되며, 조기진통 임부의 처치시 혈청 CRP치가 0.8mg/bl 이상인 경우 임부의 불현성 감염을 의심하여야 할 것으로 생각된다.

• Tuberculosis and Respiratory Diseases
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• 제81권1호
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• pp.59-72
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• 2018

Background: It remains uncertain if $interferon-{\gamma}$ release assays (IGRAs) are superior to the tuberculin skin test (TST) for the diagnosis of active tuberculosis (TB) or latent tuberculosis infection (LTBI) in immunosuppressed populations including people with human immunodeficiency virus (HIV) infection. The purpose of this study was to systematically review the performance of IGRAs and the TST in people with HIV with active TB or LTBI in low and high prevalence TB countries. Methods: We searched the MEDLINE database from 1966 through to January 2017 for studies that compared results of the TST with either the commercial QuantiFERON-TB Gold in Tube (QFTGT) assay or previous assay versions, the T-SPOT.TB assay or in-house IGRAs. Data were summarized by TB prevalence. Tests for concordance and differences in proportions were undertaken as appropriate. The variation in study methodology was appraised. Results: Thirty-two studies including 4,856 HIV subjects met the search criteria. Fourteen studies compared the tests in subjects with LTBI in low TB prevalence settings. The QFTGT had a similar rate of reactivity to the TST, although the first-generation version of that assay was reactive more commonly. IGRAs were more frequently positive than the TST in HIV infected subjects with active TB. There was considerable study methodology and population heterogeneity, and generally low concordance between tests. Both the TST and IGRAs were affected by CD4 T-cell immunodeficiency. Conclusion: Our review of comparative data does not provide robust evidence to support the assertion that the IGRAs are superior to the TST when used in HIV infected subjects to diagnose either active TB or LTBI.

• 동의생리병리학회지
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• 제22권6호
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• pp.1509-1517
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• 2008

The flowers and buds of Lonicera Flower (LF), are used in Korean herbal medicine for latent-heat-clearing, antipyretic, detoxicant and anti-inflammatory ailments. This plant is used worldwide for the treatment of many types of inflammatory disease including respiratory infections, diabetes mellitus, rheumatoid arthritis and play an important role in immune reaction. These pharmaceutical effects of LF looks like to be related to its antioxidant capacity and phytochemicals containing in LF. In this study, the antioxidant activity of extract from LF was studied in vitro methods by measuring the antioxidant activity by TEAC, measuring the scavenging effects on reactive oxygen species (ROS) [superoxide anion, hydroxyl radical] and on reactive nitrogen species (RNS) [nitric oxide and peroxynitrite] as well as measuring the inhibitory effect on $Cu^{2+}$ induced human LDL oxidation and the inhibitory effect on collagen induced platelet aggregation. The LF extracts were found to have a potent scavenging activity, as well as an inhibitory effect on LDL oxidation and on platelet aggregation. In conclusion, the LF extracts have anti-oxidative and anti-atherosclerotic effects in vitro system, which can be used for developing pharmaceutical drug against oxidative stress and atherosclerosis.

• 한국콘텐츠학회논문지
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• 제17권4호
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• pp.569-575
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• 2017

법광원(Forensic Light Source)은 증거물을 훼손하지 않는 비파괴적 방법으로 증거물을 증강하기 위해 주로 사용된다. 현장에 유류된 지문 증거는 사건 해결과 개인 식별을 하는데 있어 매우 중요하다. 다양한 파장 대역의 광원을 사용하면 형광분말이 처리된 지문과 형광시약이 처리된 지문을 증강할 수 있어 실무에서 널리 활용되고 있다. 본 연구에서는 널리 사용되고 있는 아미노산 반응 형광시약인 DFO(1,8-Diazafluoren-9-one)와 1,2-IND(1,2-Indanedione)을 처리한 표준 지문에 레이저 광원과 LED광원을 조사하여 증강 효과를 비교하여 보았다. 비교 결과, 전반적으로 레이저 광원이 LED 광원에 비해 더 나은 지문 증강 효과를 보였다. 하지만, 각 광원은 성능과 휴대의 측면에서 장단점을 가지므로 연구자들은 감식환경과 상황에 따라 레이저 광원과 LED 광원을 상호 보완적으로 사용하는 것을 권고한다.

• Macromolecular Research
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• 제17권2호
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• pp.84-90
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• 2009

We prepared side-chain liquid crystalline polymers comprising two monomeric units, one having a mesogenic side group that could form a smectic mesophase and the other having a phenolic group attached to the polymer backbone via a thermally reversible urethane bond. The urethane linkage between the isocyanate and phenol groups was stable at room temperature, but it cleaved to generate an isocyanate group when the temperature was increased. When annealed, the copolymers in their smectic mesophases became insoluble in common organic solvents, suggesting the formation of network structures. XRD analysis showed that the annealed polymers maintained their smectic LC structures. The crosslinking process probably proceeded via the reaction of the dissociated isocyanate groups. Some of the isocyanate groups would have first reacted with moisture in the atmosphere to yield amino groups, which underwent further reaction with other isocyanate groups, resulting in the formation of urea bonds. We presume that only polymer chains in the same layer were crosslinked by the reaction of the isocyanate groups, resulting in the formation of a layered polymer network structure. Reactions between the layers did not occur because of the wide layer spacing.

• IMMUNE NETWORK
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• 제11권1호
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• pp.50-58
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• 2011

Background: Epstein-Barr virus associated gastric lymphoepithelioma-like carcinoma (LELC) is characterized by the intensive infiltration of lymphoid cells, the presence of EBV, and the better prognosis over typical adenocarcinoma. Thus, it was assumable that viral latent proteins may be responsible for the recruitment of a certain T cell repertoire to EBV-associated gastric carcinoma. Methods: To examine above possibility, EBV gene expression in gastric carcinoma tissues and usage of TCR among the tumor infiltrating lymphocytes were analyzed. Results: EBV specific DNA and EBERs RNA were detected in 4 out of 30 patients. RT-PCR analysis revealed that all 4 of EBV-positive tumor tissues expressed EBNA1 mRNA and BARTs and LMP2a was detected only one sample out of 4. However, the EBNA2 and LMP-1 transcripts were not detected in these tissues. $CD8^+$ T cells were the predominant population of infiltrating lymphocytes in the EBV-positive gastric carcinoma. According to spectra type analysis of infiltrating T cells, 10 predominant bands were detected by TCR $V{\beta}$ CDR3 specific RT-PCR from 4 EBV-positive tumor tissues. Sequence analysis of these bands revealed oligoclonal expansion of T cells. Conclusion: These findings suggest that clonally expanded T cells in vivo might be a population of cytotoxic T cells reactive to EBV-associated gastric carcinoma.