• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2002년도 추계학술발표논문집
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• pp.218-226
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• 2002

제지분야에서 중성 사이즈제로 광범위하게 사용되어지는 AKD emulsion의 사이징 효과의 발현속도가 낮은 단점을 보완하기 위하여, 기존 AKD emulsion에 추가 투입 사용함으로써 발현속도를 높여줄 수 있는 AKD 급속 반응형 정착제, 그리고 정착제를 사용하지 않는 초지 시스템에서도 급속 경화가 가능한 급속 반응형 AKD emulsion을 개발 하였다. AKD 급속 반응형 정착제의 투입량 및 종이 건조시간에 따른 사이징 효과를 상용화된 정착제와 비교하였으며 이 결과로부터 보다 빠른 사이징 효과발현을 확인하였다. 정착제를 사용하지 않는 시스템에서 급속반응형 AKD emulsion의 사이즈도 급속발현 효과를 확인하기 위하여 상용화된 emulsion과 사용량에 따른 사이징 효과와 건조시간에 따른 사이징효과를 비교함으로서 사이즈도의 급속 발현을 확인 할 수 있었다.

• 한국의류학회지
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• 제24권3호
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• pp.440-447
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• 2000

The effects of DP finishing conditions including process technique and finishing agent on the mechanical properties and hand of cotton fabrics were investigated. 100% cotton fabrics were treated with NMA/DMDHEU and NMA/YF using wet-fixation and steam-fixation process. For comparison, conventional pad-dry-cure process was used with DMDHEU. After DP finishing, tensile and compressional resilience increased and bending hysteresis decreased, resulting in the improvement of dimensional stability of cotton fabric. WF and SF process rendered fabrics better shear properties, tensile energy, and compressional linearity and energy than PDC process. However, SF process produced fabrics with higher geometrical roughness than WF process. After DP finishing, primary hand values except Koshi increased, resulting in the increase of total hand value of cotton fabric.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2002년도 추계학술발표대회 논문집
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• pp.273-275
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• 2002

In this studies, curing behavior and mechanical properties of tetrafunctional epoxy resin (4EP)/ fluorine-containing epoxy resin (FEP) blend systems was investigated with 4, 4'-diaminodiphenol methane (DDM) as a curing agent. The cure activation energies $(E_a)$) were studied by Flynn-Wall-Ozawa's equation with dynamic DSC method. For the fracture toughness of the casting specimens, the critical stress intensity factor ($K_{IC}$) and the specific fracture energy ($G_{IC}$) were determined by fracture toughness test.

• Archives of Pharmacal Research
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• 제29권12호
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• pp.1067-1073
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• 2006

Cisplatin, a platinum coordinated complex, is a widely used antineoplastic agent for the treatment of metastatic tumors of the testis, metastatic ovarian tumors, lung cancer, advanced bladder cancer and many other solid tumors. The cytotoxic action of the drug is often thought to be associated with its ability to bind DNA to form cisplatin-DNA adducts. The development of resistance to cisplatin during treatment is common and constitutes a major obstacle to the cure of sensitive tumors. Although to understand the clinically relevant mechanisms of resistance, many studies have been aimed at clarifying the biochemical/molecular alterations of cisplatin-resistance cells, these studies did not conclusively identify the basis of cellular resistance to cisplatin. In this review, cisplatin resistance was discussed in terms of the relevant transporters, such as copper transporters (CTRs), organic cation transporters (OCTs) and multi-drug resistance related transporters (MDRs). These transporters seem to be contributed to cisplatin resistance through the reduction of drug accumulation in the cell. Better understanding the mechanism of cisplatin resistance associated with transporters will provide the useful informations for overcoming the cisplatin resistance.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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• pp.771-773
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• 1988

The Mechanical strength and the electrical insulation properties of the Epoxy Resin vary with the formation of chemical reactions between Epoxy and curing agent. Therefore, to study their reactions is important for understanding the properties of the cured Epoxy. In this paper, to get the cured Epoxy having good electrical insulation property, it is studied the effects of the surrounding temperature during the cure process on the property of the cured Epoxy. In the experiment, Epoxy is cured with the surrounding temperature varied between -5[$^{\circ}C$] to 50[$^{\circ}C$]. As the results, it follows that the higher the temperature is, the faster the cross-link process is.

• 한방안이비인후피부과학회지
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• 제15권1호
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• pp.50-62
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• 2002

In the age of puberty or 20-30th young people who are sensitive to outward appearance, acne is serious problem at beauty and has social and psychological influence on that people. So this experiment is carried out for test whether the addition temperament drugs of Yungyopaedock-san(YP) have an anti-inflammatory effect and have suppression effect on immunocyte in the state of inflammation which induced by acne. The results was as follows. 1. YP has suppress inflammatory reaction induced by carageenan. 2. YP has suppress increasing activation of abdominal cavity macrophage in the carageen and zymosan induced inflammation. 3. YP has suppress increasing activation of spleen cell in the carageenan and zymosan induced inflammation. Based on the above result, YP was improved its suppression effect to the inflammatory reaction through the suppression of spleen cell and macrophage activation. So we concluded that YP is prospected as a anti-inflammatory agent to cure inflammation induced by ance.

• Advances in Traditional Medicine
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• 제3권1호
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• pp.1-7
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• 2003

Some Korean plants were found to inhibit HIV-1 protease activity. The extracts of Acanthopanax koreanum (stem bark), Berchemia berchemiaefolia (stem), Berchemia berchemiaefolia (bark), Distylium racemosum (leaves), Distylium racemosum (stem), Lindera erythrocarpa (leaves), Physalis alkekengi var. francheti (root), Platycarya strobilacea (stem), Rodiola rosea (root), Rosa davurica (stem), Syringa dilatata (leaves), Viburnum awabuki (stem) and Viburnum awabuki (leaves) showed significant inhibitory effect against HIV-1 protease. Camelliatannin H from Camellia japonica and uvaol from Cratagus pinatrifida were potent active inhibitors of HIV-1 protease with $IC_{50}$ values of $0.9\;{\mu}M$ and $5.5\;{\mu}M$, respectively. The cure and prevention of AIDS have been a global challenge since it was discovered in the ealy 1980s. However, the development of anti-HIV agent that can effectively treat or prevent this disease are still demanded.

• Advances in materials Research
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• 제12권1호
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• pp.1-13
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• 2023

The combination of cobalt ferrite and natural rubber has a potential to enhance the functional properties of rubber ferrite composites available on the market. In this study, cobalt ferrite was synthesized by the sol-gel method with tapioca starch as a cheating agent and then incorporated into natural rubber using an internal mixer. The curing characteristics, magnetic hysteresis, complex permeability, and permittivity of the rubber ferrite composites were studied as a function of the loading from 0 to 25 phr. The cure time and scorch time tended to reduce with the addition of non-reinforced cobalt ferrite fillers. The remanent and saturation magnetizations were linearly proportional to the cobalt ferrite loading, consistent with the rule of mixture. On the other hand, the increase in cobalt ferrite loading from 5 to 25 phr slightly affected the coercive field and the complex permeability. Using the maximum loading of 25 phr, both real and imaginary parts of the permittivity were significantly raised and reduced with the frequency in the 10-300 MHz range.

• 대한한방내과학회지
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• 제25권2호
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• pp.277-287
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• 2004

Objective : Diabetes is a disease in which the body does not produce or properly use insulin. Etiological studies of diabetes and its complications showed that oxidative stress might playa major role. Therefore, many efforts have been made to regulate oxygen free radicals for treating diabetes and its complications. Because Jindangwon has been known to be effective in treatment of diabetes, the methanol extract of Jindangwon was tested for its effectiveness in reducing the oxidative stress induced by Streptozotocin. Methods : Jindangwon was washed, dried in the shade and crushed. The crushed Jindangwon was extracted 3 times, each time with 3 volumes of methyl alcohol at $60^{\circ}C$ for 24 hours. The extract was filtered and evaporated under reduced pressure using a rotary evaporator to yield 30.6 g. Jindangwon extract was oral-administered to the diabetic rats induced by streptozotocin 50 mg per 1 kg of body weight for 15 days. The efficacy of the Jindangwon extract was examined with regard to the enzymatic pathways involved in the oxygen free radical production and the glutathione balance. Results : he effects of the methanol extract of Jindangwon in streptozotocin-induced diabetics rats with regard to body weight, blood glucose level, hepatic lipid peroxide level, hepatic xanthine oxidase activity and type conversion rate, hepatic glutathione level, hepatic glutathione peroxidase activity, hepatic glutathione reductase activity, hepatic aldose reductase activity, and hepatic sorbitol dehydrogenase activity were favorable enough to suggest that it is a cure for diabetes and its complications. Conclusions :These results support Jindangwon as an effective reducing agent for oxidative stress in the tissues and organs by regulating the production of oxygen free radicals. Jindangwon, in particular, shows promising results for its use as a cure, or preventative medicine for diabetes and its complications by reducing oxidative stress in beta-cells of the pancreas.

• 공업화학
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• 제27권3호
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• pp.259-264
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• 2016

본 연구에서는 norbonene dialkyl ester 6종을 isoprene rubber에 적용하여 내분비계 교란물질인 DEHP에 대한 대체 가능성을 평가하였다. IR 시편은 isoprene rubber (IR)와 norbonene dialkyl ester, 가황제 등을 배합하여 제작하였으며, 토크값, 스코치 시간, 최적가황시간, 무니점도를 측정하여 가공성을 평가하였고, 경도, 인장강도, 100% modulus, 신율 등물성을 평가하여 이를 DEHP를 적용한 경우와 비교하였다. 그 결과 토크 값의 경우 최저토크, 최대토크 모두 DEHP 보다 낮거나 유사한 값을 나타내었고, 스코치 시간, 최적가황시간은 DEHP보다 같거나 길게 측정되었다. 무니점도는 DEHN이 낮은 값을 나타내어 DEHP를 첨가한 경우보다 가공성이 우수함을 확인하였다. 경도와 열적 특성의 경우 norbornene계 화합물이 DEHP와 같거나 유사한 경향을 보였다. 인장특성의 경우 선형의 알킬기를 가진 norbornene계 화합물을 적용한 경우가 우수함을 확인하였다.