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Kim M.-H.,Chonbuk National University | Kim S.-Y.,Chonbuk National University | Ko J.-M.,NICS | Jeong D.-Y.,Sunchang Research Center for Fermentation Microbes | Kim Y.-S.,Chonbuk National University
Food Science and Biotechnology | Year: 2012

To select proper soybean cultivars for producing functional cheonggukjang, a comparison was made of the physiological activities of different cheonggukjang prepared with 30 different soybean cultivars. The isoflavone content was highest in the cheonggukjang made from 'Daepung' soybeans at 208. 75 mg%. In general, the contents of glycone types (and derivatives) of isoflavone, specifically daidzin, glycitin, genistin, and malonylgenistin, were higher than that of aglycone types. The polyphenol contents ranged from 30. 62 to 80. 32 mg%. The DPPH radical scavenging activity and superoxide dismutase (SOD)-like activity of the cheonggukjang made from yellow soybeans had a higher activity than those of black soybeans. Although there are no consistent tendencies in the functional activity of cheonggukjang according to soybean color and size, the antioxidative activity is highest in the cheonggukjang made of yellow soybeans. Additionally, the fibrinolytic and inhibitory activities against angiotensin I-converting enzyme are highest in the cheonggukjang made of black soybeans. From these results, it can be concluded that the DPPH free radical scavenging activity and SOD-like activity in cheonggukjang depends on the phenolic compound content in soybean. © 2012 The Korean Society of Food Science and Technology and Springer Netherlands.

Lee S.H.,KIMM | Kwak J.H.,NICS | Lee S.Y.,KIMM | Lee J.H.,KIMM
International Journal of Automotive Technology | Year: 2015

A mobile emission laboratory was applied to measure particle number size distributions of exhaust emissions for base diesel, plasma-assisted burner type-DPF, and urea-SCR equipped vehicles during on-road driving and laboratory measurements using chassis dynamometer. The measurement of total particle number concentrations revealed that the base diesel had the highest concentrations, while the DPF system effectively reduced particle numbers during all operation conditions. The particle reduction rate during idling and constant speed conditions was 60-99.9% for the DPF and 10-25% for the urea-SCR. The size distributions of particles showed that the dilution ratio significantly affected the nanoparticle formation and growth, and that laboratory measurement, in general, tended to underestimate the nucleation mode (NM) (< 50 nm) particles compared to on-road results. The NM fraction during on-road measurements was the highest at low vehicle speed (20 km/h) with values of 94% for the base diesel, 96% for the DPF, and 94% for the urea-SCR equipped vehicles, and it was the lowest at increased vehicle speed (80 km/h) with values of 59% for the base diesel, 61% for the DPF, and 65% for the urea-SCR. © 2015, The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg.

Choi I.,NICS
Journal of the Korean Society of Food Science and Nutrition | Year: 2010

The compositions of fatty acid and amino acid of specialty rice which includes colored rice (Heugjinju, Jeugjinju, Josangheugchalbyeo), flavored rice (Heughyangmi, Hyangmi1), and giant embryo rice (Keunnun) were determined and compared to those of regular rice (Ilpumbyeo, Whaseonchalbyeo). Major fatty acids were linoleic acid (C18:2) and oleic acid (C18:1), which were composed of 75∼80% of total fatty acids. Major amino acids were glutamic acid and aspartic acid in most cultivars but Jeugjinju in which cysteine (169.61 nmol) and GABA (129.32 nmol) were the most abundant amino acids. Thermal properties measured by differential scanning calorimeter (DSC) revealed that the enthalpy (ΔH) for starch gelatinization was the highest in Josangheugchalbyeo and Whaseonchalbyeo. It suggests that the starch structure of waxy rice could be more crystallized compared to non-waxy rice, and also that amylopectin could have more impact on starch gelatinization than amylose. The on-set and complete temperature for starch gelatinization were higher in colored rice of Heugjinju and Jeugjinju, and regular rice of Whateonchalbyeo.

Choi I.,NICS
Journal of the Korean Society of Food Science and Nutrition | Year: 2010

Rice cultivars of Goami2 (G2), Baegjinju (BJJ), and Sulgaeng (SG) with different amylose contents were developed by mutation breeding via N-methyl-N-nitrosourea (MNU) treatment to Ilpumbyeo (IP), high japonica rice. They were identified by different appearances such as grain size, color, and shape. In this experiment, the compositional and physical qualities of those cultivars were examined. The G2 rice classified as a high-amylose rice cultivar was significantly higher in its non-digestable carbohydrates contents. Linoleic and oleic acid were composed of 70∼75% of all fatty acids composition regardless of milled and brown rice, except G2 rice in which palmitic acid was the major fatty acid followed by linoleic acid and oleic acid in order. Major amino acids were aspartic acid, glutamic acid, and hydroxy lysine. It was found that cysteine contents were higher in the cultivars of endosperm mutant rice. The DSC analysis revealed that enthalpy was the highest in BJJ followed by SG, IP, and G2 rice. The lowest enthalpy of G2 might be attributable to the higher amylose content. Ilpumbyeo in its cooked rice form showed the highest in Toyo value and less in hardness, but G2 was vise versa. Results of gelatinization and cooked rice properties suggest that G2 was less suitable for cooked rice, but has a potential for functional ingredients from nutritional point of view. The BJJ and SG could be used for traditional cooking as well as for processed foods.

Lim U.T.,Andong National University | Kim E.,Andong National University | Mainali B.P.,NICS
Journal of Asia-Pacific Entomology | Year: 2013

A flower model trap developed by modifying an artificial yellow chrysanthemum flower was more attractive to flower thrips than commercial yellow sticky traps. Installation of these flower model traps (20 traps per 50m2 plot) was reported to reduce seasonal populations of Frankliniella intonsa (Trybom) (Thysanoptera: Thripidae) on strawberry flowers in greenhouses. In this study, we sought to determine if the installation of such flower model traps would reduce thrips populations in a pepper field. The traps were installed at the bottom of the plant canopy at varying densities (0, 5, 10, and 20 traps) in 20 plots (each 3×5m2) using a completely randomized design. Thrips populations on pepper flowers were sampled from 1 to 29 July in 2009. All thrips sampled on the flowers were identified as F. intonsa. A significant effect of treatment and sampling date was found from repeated-measure analysis of variance. The highest density (20 traps per 15m2) of traps significantly reduced the female and male F. intonsa population compared to the control by 61 and 49%, respectively. However, no difference in immature thrips numbers was found among the treatments. These results indicate that this flower model trap can be a useful tool for the management of flower thrips on field-grown peppers. © 2013 Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society.

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