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이준헌,김태경 한국섬유공학회 2020 Fibers and polymers Vol.21 No.10
A halochromic fluorescence dye was synthesized to fabricate acid-gas sensing textiles. The dye has a maximumabsorption at 436 nm and stokes shift of 54 nm in ethanol, which means that it exhibits a typical fluorescence color ofgreenish yellow. The dye was designed to have good substantivity toward hydrophobic and chemical resistant polyethylenicfibers, such as high molecular weight polyethylene (HMWPE) fibers, by introducing di-butyl and t-butyl groups on coumarinand benzoxazole moieties of the chromophore, respectively. The fluorescence dye showed the change of both color andfluorescence emission properties not only in a solution by addition of hydrochloric acid but also inside the HMWPE fiber onexposure to gas phase hydrogen chloride even at relatively low concentrations. From the repeat test, the sensing performancewas maintained reversibly even after 20 repeat cycles of adsorption and desorption of gas phase hydrogen chloride. TheHMWPE fabrics dyed with the fluorescence dye can be washable by showing fastness of rating 4-5 to washing.
페카리 종 Tayassu tajacu에서 내인성 리트로 바이러스의 발견
이준헌,Lee, Jun-Heon Institute of Agricultural Science 2003 Korean Journal of Agricultural Science Vol.30 No.1
본 연구는 페카리와 돼지간의 내인성 리트로 바이러스의 연관성을 조사하기 위하여 실시되었으며 페카리의 리트로 바이러스의 DNA 염기서열을 알기위해 degenerate primers를 이용하였다. 두개의 리트로 바이러스의 클론이 이 연구에 의해 만들어 졌으며 DNA 염기서열을 분석하여 본 결과 기존에 알려진 쥐와 돼지의 리트로 바이러스 염기서열과 높은 상동성을 보였다. 이 페카리 리트로 바이러스는 페카리 종에 있어서 처음으로 밝혀진 내인성 리트로 바이러스인 동시에 페카리 종은 C형 리트로 바이러스 염기서열을 가지고 있지 않다는 기존의 연구결과와 상반된 것으로 그 중요성이 있다. To investigate the relationship of endogenous retroviruses in peccaries and pigs, a set of degenerate primers was used in this study to amplify peccary retroviral sequences. The sequences of two putative retroviral clones showed close homology to mouse and pig retroviral sequences. The peccary endogenous retroviral sequences are significant in that they are the first such sequences reported in peccary species and repudiate old claims in the literature that peccaries do not have C-type retroviral sequences.
강황이 난황의 비강내 점적을 통하여 유발된 생쥐의 천식에 미치는 영향
이준헌,김종한,박수연,최정화,Lee, Jun-Hun,Kim, Jong-Han,Park, Su-Yeon,Choi, Jeong-Hwa 대한한방안이비인후피부과학회 2008 한방안이비인후피부과학회지 Vol.21 No.3
Objective : This study was designed to investigate the effects of Curcuma longa Rhizoma(CLR) on asthma. Methods : Detecting splenocyte proliferation rates, cytokines and antigen specific antibody isotypes in bronchoalveolar lavage fluid (BALF). In addition, the present author I also investigated changes in spleen and histopathological changes of lung tissues. Results : Oral administration of CLR lowered spleen weight and splenocyte proliferation rates. In addition, levels of IL-4, IL-17A and Granulocyte/Macrophage Colony-Stimulating Factor(GM-CSF), Th2 driven cytokines, were lowered respectively and IFN-g, and Th1 driven cytokine, were elevated by CLR. Levels of Ovalbumin(OVA) specific IgE and IgGl in BALF were also lowered by oral administration of CLR too. Conclusion : CLR is useful to treat patients with asthma and the mechanisms are related to the in suppression of Th2 skewing reactions.