• Applied Chemistry for Engineering
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• v.31 no.2
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• pp.138-146
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• 2020

Design of experiments (DOE) is a method that has been applied in the industry to improve value for many decades. This study provides an overview of 115 cases of statistical DOE applications in the field of chemical engineering. All cases were published in important scientific journals for the last ten years. The applied design type, the experiment size, the number of factors and levels affecting the response variable, and the area of application for the design were all analyzed. Obviously, the number of publications related with statistical DOE increased over time.

• Asian Journal of Innovation and Policy
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• v.3 no.2
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• pp.193-215
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• 2014

This study analyzes the factors on the determinants of research productivity. In addition, this study uncovers the relationships between research productivity and various explanatory variables, and between explanatory variables. As for research productivity, 3 indices were used such as the number of papers, patents, and a combination of them. The data is the 3-year average from 2010-2012 by 1,383 researchers from 6 disciplines such as physics, chemistry, biology, mechanical engineering, electricity and electronics, and chemical engineering, reported to the National Research Foundation of Korea. Personal factors such as sex, age, academic rank and location of affiliation show the group difference for productivity. In addition, most resource factors such as the number of graduate students and research funds showed the same result with personal factors. As for the determinants, master and doctoral students and government funds are the most powerful factors for research productivity, but industry funds for patent and overall productivity.

• Bulletin of the Korean Chemical Society
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• v.35 no.12
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• pp.3532-3534
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• 2014

In theoretical simulations of proton transfer in DNA, environmental factors nearly have not been considered. In our calculations, using QM/MM method on the basis of CP2K, proton transfer on adenine-thymine base pair is studied in water, at wide scope temperature, and under the external electric field. Our results indicate that the external electric field induces the proton transfer at room temperature, and its intensity and temperature have some effect on hole localization and proton transfer.

• Journal of the Korea Safety Management & Science
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• v.2 no.1
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• pp.129-139
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• 2000

Hazard and operability Review(HAZOP) is widely used as a process safety analysis which systematically identifies potential process deviations and settles the problems. In this paper, we carried out a process hazard analysis using HAZOP in K chemical plant. As a result, we showed that the plant could be operated more saftly and be saved a lot of money by eliminating several existing hazardous factors through the change of processes and designs.

• Bulletin of the Korean Chemical Society
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• v.33 no.11
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• pp.3817-3822
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• 2012

Various alkenylphosphonates were prepared via the palladium-catalyzed oxidative arylation of cinnamylphosphonates with arenes. The regioselectivity during the ${\beta}$-H elimination of the corresponding alkylpalladium intermediate was governed most likely by steric factors.

• Bulletin of the Korean Chemical Society
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• v.16 no.2
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• pp.96-101
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• 1995

The optical properties of individual 3-to 14-micron diameter CdS crystalline spheres embedded in poly(methyl methacrylate) were studied using elastic scattering. The presence of well defined sharp peaks in the 550 to 600 nm elastic scattering spectra confirmed that each microcrystal acts as an optical cavity with cavity quality factors exceeding 104. Such natural resonator microcrystals should lead to greatly enhanced local field effects near the surface of CdS, quantum electrodynamic modification of optical transition rates of nearby species and altered photochemistry. Absorptive heating following high intensity laser irradiation was found to induce a transient washout of the high Q modes.

• Bulletin of the Korean Chemical Society
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• v.6 no.1
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• pp.33-36
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• 1985

The luminescence intensity of $Tb^{3+}$ bound to picolinic acid, squaric acid, and 2,3-pyrazinedicarboxylic acid has been studied in water and water-ethanol mixtures. It has been found that the emission intensity of $Tb^{3+}$ in the complexes is enhanced with the increase of ethanol content in water-ethanol mixtures. Several factors affecting on the emission intensity of $Tb^{3+}$ in waterethanol mixtures are discussed.

• Proceedings of the PSK Conference
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• 2003.10b
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• pp.174.2-174.2
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• 2003

Quorum sensing, a gene expression in response to population density, is regulated by chemical signals, most of which are acylated homoserine lactones (AHLs). The AHL derivatives have been reported to regulate bioluminescence, virulence factors and / or swarming motility in bacteria. It is hypothesized that higher organisms may have evolved specific means to interfere with bacterial communication as exemplified in the AHL-antagonistic activity of halogenated furanones isolated from the Australian macroalga Delisea pulchra. (omitted)

• Journal of Plant Biotechnology
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• v.31 no.4
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• pp.279-283
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• 2004

To lily (Lilium longflorum cv. Georgia) pollen, impacts by some physical, chemical and biological factors were examined in respects of its growth and transient gene expression via agro-infiltration. Rolling movement in liquid medium or vacuum pressure during Agro-infiltration was regarded as a impact that should be minimized for normal pollen growth. Pollen growth was maintained well in relatively broad range of temperature (19 to 27$^{\circ}C$) or pH (5.0 to 8.0). Chemical factors such as cefotaxime (up to 300mg/L), acetosyringone (up to 800 $\mu$M) and syringealdehyde (up to 800 $\mu$M) did not show any harmful effects but kanamycin severely did even at concentration as low as 25mg/L in some cases. For GUS gene expression, acetosyringone at 200 to 400 $\mu$M slightly improved the efficiency while syringealdehyde did not. Brief agro-infiltration followed by 18 hr of co-incubation of pollen along with Agrobacterium was suggested as a condition basically required for the transient expression system using lily pollen regardless of the presence of acetosyringone.

• Journal of Microbiology and Biotechnology
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• v.27 no.3
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• pp.417-428
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• 2017

Diseases caused by foodborne or waterborne pathogens are emerging. Many pathogens can enter into the viable but nonculturable (VBNC) state, which is a survival strategy when exposed to harsh environmental stresses. Pathogens in the VBNC state have the ability to evade conventional microbiological detection methods, posing a significant and potential health risk. Therefore, controlling VBNC bacteria in food processing and the environment is of great importance. As the typical one of the gram-negatives, Escherichia coli (E. coli) is a widespread foodborne and waterborne pathogenic bacterium and is able to enter into a VBNC state in extreme conditions (similar to the other gram-negative bacteria), including inducing factors and resuscitation stimulus. VBNC E. coli has the ability to recover both culturability and pathogenicity, which may bring potential health risk. This review describes the concrete factors (nonthermal treatment, chemical agents, and environmental factors) that induce E. coli into the VBNC state, the condition or stimulus required for resuscitation of VBNC E. coli, and the methods for detecting VBNC E. coli. Furthermore, the mechanism of genes and proteins involved in the VBNC E. coli is also discussed in this review.