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임미진,서종철,김도완,한학수 한국고분자학회 2014 Macromolecular Research Vol.22 No.10
To enhance the thermal stability and barrier properties of pure poly(vinyl alcohol) (PVA), a series ofpoly(vinyl alcohol)/vinyltrimethoxysilane (PVA/VTMS) hybrid films were prepared via a sol-gel process, and theirphysical properties were investigated as a function of VTMS content. During the sol-gel process, simultaneous reactionsbetween hydroxyl groups of PVA and silanol groups of hydrolyzed VTMS and self-condensation of VTMSoccurred, inducing a cross-linked network structure and greatly enhanced thermal stability and oxygen barrier properties. The glass transition temperature and thermal decomposition temperature (T5%) of the PVA/VTMS hybridfilms increased from 72.6 to 84.3 oC and 273.6 to 342.2 oC, respectively, with increasing VTMS content from 0 to20%. Oxygen transmission rates of the hybrid films decreased from 6.12 to 0.17 cm3/m2×day, and those of the hybridfilms incorporating 5%, 10%, and 20% VTMS were suppressed by 65.7%, 95.6%, and 97.2%, respectively, versusa pure PVA film. These are dependent on the chemical structure and morphology of the films with differing initialamounts of VTMS. The chemical affinity for water, intermolecular packing, and rigidity in polymer chains increasedwith increasing cross-linking by VTMS, leading to enhanced oxygen barrier properties and thermal stability in thePVA/VTMS hybrid films.
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해방직후 귀환 서사에 나타난 내셔널리즘의 형성과 젠더-전홍준의 「귀환」과 이금남의 「이향」을 중심으로-
임미진 한국현대소설학회 2018 현대소설연구 Vol.- No.69
The purpose of this article is to show that the process of the formation of the nationalism of men returning immediately after liberation is reproduced by women 's actions as being possible/impossible. Women who returned to Joseon in novels shortly after liberation are often reluctant or passive. However, the cracking and abduction of women's conducts can lead to unexpected events, which may be a sign of the birth of women with their own actions. In the case of men returning to Korea with women, the behavior of women is closely related to the formation of male national identity. The act of Su-Yeon, which is symbolized as ethnography ethnicity in the Return, provides a major background for securing the national identity of 'I'. On the other hand, Anna of Return is symbolized as an outsider, unlike Su-Yeon. By not choosing to return to Joseon, Anna causes cracks and divisions in the desire of men to enter the boundaries of Joseon as a national subject and makes his return to scandals. Such an action is not a backdrop for men but foreshadows a transformation into a woman as a subject with self-actions. 이 논문은 해방직후 귀환하는 남성의 내셔널리즘의 형성과정이 여성의 행위를 통해 불/가능한 것으로 재현되고 있다는 것을 밝히고자 한다. 해방직후의 소설에서 조선으로 귀환하는 여성은 남성에 의지적이거나 수동적으로 재현되는 경우가 대부분이다. 그러나 여성의 행위가 가지는 균열과 전복은 예기치 않는 사건을 발생시키고 그것은 자기행위를 지닌 여성의 탄생을 예고하기도 한다. 여성과 함께 조선으로 귀환하는 남성의 경우 여성의 행위는 남성의 민족정체성 형성과 밀접한 관련을 맺고 있다. 「귀환」에서 민족지(民族地)로 상징되는 수연의 행위는 남성화자인 ‘나’가 해방된 조선의 민족정체성을 확보하는 데 주요한 배경막을 제공한다. 반면 「귀환」과 「이향」의 안나는 수연과 달리 외부자로서 상징된다. 안나는 조선으로의 귀환을 선택하지 않음으로써 민족주체로서 조선의 경계 내로 들어오고자 하는 남성의 욕망에 균열과 분열을 일으키고 그의 귀환을 추문으로 만들어버린다. 이러한 행위는 남성의 배경막이 아닌 자기행위를 지닌 여성주체로의 변모를 예고한다.
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조미김 포장을 위한 PET/PVA-BA/OPP 다층필름 제조 및 특성분석
임미진,김도완,서종철,Lim, Mijin,Kim, Dowan,Seo, Jongchul 한국포장학회 2017 한국포장학회지 Vol.23 No.1
수증기 및 산소에 대한 차단성이 개선된 PVA-BA 코팅 조성액의 포장소재로의 적용가능성을 확인하기 위하여 콤마 코팅과 라미네이션 공정을 이용하여 PET/PVA-BA/OPP 다층필름을 제조하였다. PCT 전 후의 PET/PVA-BA/OPP 다층필름의 기체, 수증기 차단특성 및 인장강도를 확인하였고 이를 PA/PA/EVOH/PP 다층필름의 물성과 비교하였다. PVA내 BA 함량이 증가함에 따라 물성이 증가하는 것을 확인할 수 있었지만, PCT 후 PET/PVA-BA/OPP 다층필름의 산소, 수증기 차단특성 및 인장강도는 감소하는 경향을 보였다. 이는 PVA-BA층 내 증가한 가교밀도와 관련이 있는 것으로 판단된다. 또한, 조미김을 이용한 저장특성분석에서, PET/PVA-BA/OPP다층필름은 PP/Al-metallized PP 다층필름에 비해 조미김의 지방산화를 야기시키는 요인을 효과적으로 억제하는 것으로 판단된다. 하지만, PP/Al-metallized PP 다층필름에 비해 PET/PVA-BA/OPP 다층필름의 상대적으로 높은 수분투과특성 때문에 Aw에 큰 장점을 확인하지 못하였다. 따라서, 물성 극대화 및 포장소재로 적용을 위해서는 PET/PVA-BA/OPP 다층필름 내 수분 차단성 향상에 대한 추가적인 연구가 필요하다는 것을 확인하였다. To identify applicability for packaging material of polyvinyl alcohol (PVA)/boric acid (BA) coating solution with highly-enhanced water vapor and oxygen barrier properties, the PET/PVA-BA/OPP multi-layer films were prepared through comma coating and lamination process. The oxygen and water vapor permeabilities, and tensile strength of as-prepared multi-layer films were investigated before and after pressure cooker test (PCT). Although oxygen and water vapor permeabilites, and mechanical properties of PET/PVA-BA/OPP multi-layer films was decreased after PCT, their properties were highly enhanced as increase of BA contents in PVA matrix. This is strongly related with enhanced cross-linking density in PVA-BA layer. In storage test of seasoned-laver, the PET/PVA-BA/OPP multi-layer films were comparatively effective to suppress the increase in peroxide value originating from oxidation of seasoned-laver. Comparing the commercially available PP/Al-metallized PP for seasoned-laver packaging, however, PET/PVA-BA/OPP multi-layer films did not show any advantage in water activity. This is due to higher water vapor permeation properties of as-prepared multi-layer films. Therefore, further studies are required to enhance the water vapor permeation in PET/PVA-BA/OPP multi-layer films.
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Acute Effects of Intravenous Administration of Pamidronate in Patients with Osteoporosis
임미진,권성렬,박신구,박원 대한의학회 2010 Journal of Korean medical science Vol.25 No.9
We investigated acute effects of intermittent large dose bisphophonate therapy in osteoporotic patients. Peripheral blood mononuclear cells were incubated with alendronate (100 μM) for 18 hr, in vitro and cytokine expressions were measured by real-time RT-PCR. Pamidronate 30 mg was administered on 26 osteoporotic patients; and acute phase reactants, inflammatory cytokines and bone biomarkers were measured. The in vitro study showed significant increase in mRNA expression of IL-6, TNF-α and IFN-γ. A notable rise in serum C-reactive protein (CRP) was observed over 3 days after pamidronate infusion (P=0.026). Serum levels of TNF-α, IL-6 and IFN-γ were also significantly increased (P=0.009,0.014, 0.035, respectively) and the increase in IL-6 levels were strongly correlated with CRP levels (P=0.04). Serum calcium and c-telopeptide levels rapidly decreased after the treatment (P=0.02, <0.001, respectively). This study showed that mRNA expression of inflammatory cytokines at peripheral blood mononuclear cells (PBMC) level were observed within 18 hr and marked elevation of inflammatory cytokines and acute phase reactants were demonstrated after pamidronate infusion at the dose for osteoporosis. Our studies confirmed that intermittent large dose aminobisphosphonate causes acute inflammation.
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