Jung Yun Do

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In the previous paper of Boe and Salunkhe (4), effects of ethylene, oxygen, and lighr treatments were presented. In the study reported here, tomato fruit were treated with different light frequencies, in an artificial magnetic field, and with several chemicals during their ripening. Chemical analyses were made to determine changes in concentrations of(More)
The aroma of fruits and vegetables may be considered to originate from the basic nutrients such as carbohydrates, proteins, and fats, as well as vitamins and minerals. These nutrients, in turn, are produced by photosynthetic and related metabolic activities occurring in the plant. Current interests in aroma of fruits and vegetables have been shifting from(More)
Nonlinear optical (NLO) polymers have been considered promising materials for wavelength conversion at a low pump power. However, they have not been readily adopted to practical applications due to their high absorption coefficients, especially at a shorter interacting wavelength. Our theoretical analysis proves that the influence of absorption coefficients(More)
We demonstrate quasi-phase-matched (QPM) second-harmonic generation (SHG) at the optical communication wavelengths with side-chain polymer waveguides. A ridge waveguide structure is designed to support fundamental mode guiding at both the pump and the second harmonics, leading to a high field overlap integral of the guided modes. The nonlinearity contrast(More)
New rhodamine Schiff base sensors were developed to improve selective sensing by introducing sulfide, ester, and dithiocarbonate groups, as well as using ketones coupled to rhodamine-hydrazine. Metal sensing proceeded through the 1:1 complexation of the metal ion for most sensors in the presence of Cu2+ and Hg2+. A sensor carrying a dithiocarbonate group(More)
This study explored the chemical properties of geomaterials in relation with their fluoride removal efficiencies from water under acidic conditions. Two types each of as-received and engineered steel slags were tested, and their F- removal efficiencies were compared with those of other common or commercially available acid spill response materials. The(More)
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