• 한국환경농학회지
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• 제27권4호
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• pp.362-367
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• 2008

The legume-rhizobia symbiosis is an important source of plant growth and nitrogen fixation for many agricultural systems. This study was conducted to investigate the effects of salinity stress on nitrogen fixation and growth of pea (Pisum sativum L.), which has antimutagenic activities against chemical mutagen, inoculated with R. leguminosarum bv. viciae cultured with additional plant-to-rhizobia signal compounds, naringenin (NA,15 uM), methyl-jasmonate (MJ, 50 uM) or both, under greenhouse conditions. Three salinity levels (0.6, 3.0 and $6.0\;dS\;m^{-1}$) were imposed at 3 days after transplanting and maintained through daily irrigations. Addition of signal compounds under non-stress and stress conditions increased dry weight, nodule numbers, leaf area and leaf greenness. The inducers increased photosynthetic rate under non-stress and stress conditions, by approximately 5-20% when compared to that of the non-induced control treatment. Under stress conditions, proline content was less in plants treated with plant-to-bacteria signals than the control, but phenol content was significantly increased, compared to that of the control. The study suggested that pre-incubation of bacterial cells with plant-to-bacteria signals could enhance pea growth, photosynthesis, nitrogen fixation and biomass under salinity stress conditions.

• 한국화재소방학회논문지
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• 제33권3호
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• pp.91-97
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• 2019

국내 화학물질 안전관리는 환경부의 화학물질관리법이 기본이 되어 관리되고 있다. 그 중에서도 취급시설의 설치 및 관리기준을 강화하여 관리하고 있는데, 타 법과의 상충, 시설 규모 및 물질 특성 미반영 등으로 인한 문제점들이 노출되었다. 본 연구에서는 이러한 취급시설 기준 중 건축물 내화기준에 대해 보다 현실적이면서 합리적인 개선 방안을 마련하고자 하였다. 이를 위해 국내 유사 화학물질 취급시설 안전관리 법령의 건축물 내화기준을 비교하였으며, 환경부 화학물질안전원 국민신문고를 통해 접수된 취급시설 기준 관련 민원 2220건 중 대표 민원 사례를 통해 주요 문제점을 파악하였다. 마지막으로 화학물질관리법상 취급시설의 규모와 물질의 종류를 구체화하여 건축물 내화기준을 적용하는 개선 방안을 제시하였다. 향후, 본 연구 결과는 환경 유해성을 고려한 화학물질관리법의 기본 취지에 부합하고, 산업계에도 현실적으로 적용될 수 있는 합리적인 기준마련에 기여할 수 있을 것으로 기대된다.

• Bulletin of the Korean Chemical Society
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• 제26권3호
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• pp.361-370
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• 2005

In this review, the field of biosurface organic chemistry is defined and some examples are presented. The aim of biosurface organic chemistry, composed of surface organic chemistry, bioconjugation, and micro- and nanofabrication, is to control the interfaces between biological and non-biological systems at the molecular level. Biosurface organic chemistry has evolved into the stage, where the lateral and vertical control of chemical compositions is achievable with recent developments of nanoscience and nanotechnology. Some new findings in the field are discussed in consideration of their applicability to nanobiotechnology and biomedical sciences.

• 한국수소및신에너지학회논문집
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• 제34권6호
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• pp.734-740
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• 2023

Hydrogen emphasis on safety management due to its high potential for accidents from wide explosive limits and low ignition energy. To prevent accidents, appropriate explosion-proof electrical equipment with installed to safe management of ignition sources. However, designing all facilities with explosion-proof structures can significantly increase costs and impose limitations. In this study, we optimize the barrier to effectively control the initial momentum in case of hydrogen release and form the control room as a non-hazardous area. We employed response surface method (RSM), the barrier distance, width and height of the barrier were set as variables. The Box-Behnken design method the selection of 15 cases, and FLACS assessed the presence of hazardous area. Analysis of variance (ANOVA) analysis resulting in an optimized barrier area. Through this methodology, the workplace can optimize the barrier according to the actual workplace conditions and classify reasonable hazardous area, which is believed to secure safety in hydrogen facilities and minimize economic burden.

• Korea-Australia Rheology Journal
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• 제20권3호
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• pp.153-164
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• 2008

Modeling and experiments of three electrospinning systems have been presented and they are i) axisymmetric instabilities in electrospinning of various polymeric solutions, ii) non-isothermal modeling of polymer melt electrospinning, and iii) control of nanoparticle distribution and location via confined self-assembly of block copolymers during electrospinning. It has been demonstrated that predicted simulations are in good agreement with corresponding electro spinning experiments, and theoretical analysis provides fundamental understanding of phenomena that take place during electrospinning of various polymeric liquids.

• Toxicological Research
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• 제9권1호
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• pp.119-123
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• 1993

LBD-007, a newly developed recombinant human interferon ${\alpha}$A, was tested for primary eye and skin irritation in male New Zealand White rabbits. In the primary eye irritation test, 0.1ml of a solution of LBD-007 was instilled into the eye. In rinsing group, the eye was washed with water 30 seconds after instillation. No reaction was observed at the cornea, iris and conjunctivae by LBD-007. In the primary skin irritation test, LBD-007 was applied to the back of rabbits for 24 hours. Primary irritation index was "0" in test and control sites of all animals. Thus LBD-007 was evaluated as a non-irritant on the basis of the criteria of Draize et al.,(1994).

• 한국전기전자재료학회논문지
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• 제24권2호
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• pp.89-94
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• 2011

The cause of the thickness non-uniformity in the large area deposition of $SiO_2$ films by PECVD(Plasma Enhanced Chemical Vapor Deposition) was investigated by the plasma diagnostics. The spatial distribution of the plasma species in the chamber was obtained with DLP(Double Langmuir Probe) and the new-designed probe-type QMS(Quadrupole Mass Spectrometer). From the relationship between the spatial distribution of the plasma species and the depositing rate of the $SiO_2$ films, it was conformed that the non-uniform deposition of $SiO_2$ films was related with the spatial distribution of the oxygen radical density and electron temperature.

• 한국세라믹학회지
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• 제55권6호
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• pp.625-634
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• 2018

In this work, we describe a novel and simple technique to produce non-hydrate surfactant complexes for the formation of highly crystalline fatty acid modified SPIONs by thermolysis of iron oleate (FeOl) complexes in a non-coordinating solvent. FeOl complexes were prepared by direct coordination of iron ions and carboxylic acid; thus, we could control the stoichiometric composition of the precursor by changing the molar ratio of fatty acid and metal ions. The discrete thermal behaviors and chemical coordination of the intermediate non-hydrated FeOl were studied by thermo-analytic techniques including differential scanning calorimetry, thermal gravimetric analysis, and Fourier transform infrared spectroscopy.

• 생명과학회지
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• 제13권5호
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• pp.576-581
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• 2003

AtnsLTP (Arabidopsis nonspecific lipid transfer proteins)를 효모로부터 분리정제 하였다. AtnsLTP를 들깨 재배시 처리함으로 병해충의 피해와 기능성 물질 향상에 관계되는 실험을 수행하여 얻어진 결과는 다음과 같다. ‘만천들깨’ 잎에 각기 다른 농도의 AtnsLTP를 처리한바, anthocyain의 함량변화는 무처리에 비해 약 2배 이상 증가하였다. 또한 엽록소 함량은 16%이상 증가하였다. 따라서 AtnsLTP는 고기능성과 고품질 들깨잎 생산에 효과적이라고 생각되어진다.

• 한국입자에어로졸학회지
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• 제11권3호
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• pp.77-85
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• 2015

A Belousov-Zhabotinsky reaction in a liquid-liquid system under microwave radiation was observed under non-stirring conditions. To control this non-equilibrium reaction, nano-particle, which is active under microwave irradiation, was added to the solution. Color changes of the solution during the oscillatory reaction were found to be influenced by the irradiation power although the droplet temperature was equal to the temperature of surrounding oil. During the irradiation, the period of oscillation became shorter because the reaction rate was faster. It could also be observed that there is possibility to eliminate oscillatory behaviors of the reaction using higher power of microwave. The possibility of controlling non-linear reaction using microwave was shown since microwave can easily travel through oil phase and reach water phase.