• Transactions of Materials Processing
• /
• v.18 no.2
• /
• pp.99-106
• /
• 2009

• Proceedings of the Korea Society of Environmental Biology Conference
• /
• 2002.05a
• /
• pp.18-18
• /
• 2002

• Vending industry
• /
• v.10 no.2
• /
• pp.18-18
• /
• 2010

• Information Display
• /
• v.18 no.5
• /
• pp.12-18
• /
• 2017

• The Korean Nurse
• /
• v.14 no.6 s.80
• /
• pp.18-18
• /
• 1975

• Journal of Korean Society of Environmental Engineers
• /
• v.32 no.6
• /
• pp.587-592
• /
• 2010

A numerical analysis of reactive flow in a MILD(Moderate and Intense Low oxygen Dilution) combustor is accomplished to elucidate the characteristics of combustion phenomena in the furnace with the variation of air fuel ratio. For the smaller magnitude of air injection velocity(10 m/s), the air flow could not penetrate toward upper part of furnace. On the other hand, the air flow suppresses the fuel flow for the case of air injection velocity 30 m/s. The air velocity 18 m/s is corresponding to the stoichiometric air flow velocity, and for that case, the air flows to relatively more upper part of the furnace when compared with the case of air injection velocity 10 m/s. The reaction zone is produced with the previous flow pattern, so that the reaction zone of the air injection velocity 10 m/s is biased to the air nozzle side and for the case of air injection velocity 30 m/s, the reaction zone is inclined to the fuel nozzle side. For the cases with the air injection velocities 16, 18, 20 m/s, the reaction zone is nearly located at the center between air nozzle and fuel nozzle. The maximum temperatures and NOx concentrations for the cases of air injection velocity 16, 18, 20 m/s are lower than the cases with air injection velocity 10, 30 m/s. From the present study, the stoichiometric air fuel ratio is considered as the most optimal operating condition for the NOx reduction.

• Animal Systematics, Evolution and Diversity
• /
• v.37 no.4
• /
• pp.349-353
• /
• 2021

Scolelepis (Parascolelepis) papillosa (Okuda, 1937), originally described from a single incomplete individual from Jeju Island in Korea, was collected from the intertidal sandflats of Soan Island (Jeollanam-do province) in Korea. The examined specimens of S. (P.) papillosa agree well with the original description in having the papillae on the basal sheath of the palps, presence of occipital antenna, absence of notochaetae in chaetiger 1, branchiae completely fused with notopodial postchaetal lamellae at the anterior chaetigers, and neuropodial hooded hooks appearing from chaetiger 16. In this study, the sequences of partial mitochondrial cytochrome c oxidase subunit I (COI), 16S ribosomal DNA (16S rDNA), and the nuclear 18S ribosomal DNA (18S rDNA) of the species were determined. We also provide the detailed description and illustrations on this species based on the complete specimens newly collected in this study.

• The Korea Journal of Herbology
• /
• v.21 no.2
• /
• pp.9-13
• /
• 2006

Objectives : To determine the DNA sequence of the 18S rRNA gene of the Rehmannia glutinosa and analyze it phylogenetically Methods : Dried root of the Rehmannia glutinosa was ground with a mortar and pestle. Glass beads(0.5 mm in diameter), TE buffer and SDS solution were added to that. The mixture was vortexed vigorously and extracted with the mixture of phenol, chloroform and isoamyl alcohol and with the mixture of the chloroform and isoamyl alcohol. The nucleic acids were precipitated with ethanol and resuspended in TE buffer. Contaminating RNA was digested with RNAse A and the DNA was purified further with the Geneclean Turbo Kit. This DNA was used as a template for amplification of the 18S rRNA gene by PCR. The PCR product was cloned in the pBluescript SK II plasmid by blunt-end ligation and the DNA sequence of the insert was determined. This DNA sequence was analyzed phylogenetically by the BLAST program. Results and Conclusion : Vortexing the ground powder of the dried plant root with glass beads during cell lysis improved recovery of DNA. The DNA sequence of the Rehmannia glutinosa 18S rRNA gene was determined and deposited at the GenBank as the accession number DQ469606. Phylogenetic analysis of that sequence showed the relationship between the members of the family of Scrophulariaceae and also the close relationship of the Buddleja davidii to the members of the Scrophulariaceae family.

• Applied Biological Chemistry
• /
• v.31 no.2
• /
• pp.177-181
• /
• 1988

Korean native goat's bone marrow was low in triglycerides high in phospholipids and glycolipids. In the fatty acid composition, goat's bone marrow was high in $C_{18:1}$ and low in $C_{18:0}$. Goat's bone marrow also contained more unsaturated fatty acid than saturated fatty acid. Triglyceride and sterylester were more than others in the neutral lipids. Esterified glycoside and monogalactosyl diglyceride were higher than others in the glycolipids. Diphosphatidyl glycerol and phosphatidyl ethanolamine were higher than others in the phospholipids. In the fatty acid composition of triglycerides, Humerus and Radius, Femur and Os coxae and Lumbar vertebra were all higher in $C_{16:0}$, $C_{18:0}$ and $C_{18:1}$ than others in the 1-position of triglycerides and higher in $C_{18:0}$, $C_{18:2}$ and $C_{18:3}$ than others in the 2-position of triglycerides.

• Journal of Life Science
• /
• v.19 no.1
• /
• pp.58-64
• /
• 2009

This study was conducted to know the molting sequence and the aging points of flight feathers of steller's sea eagles (Haliaeetus pelagicus). For this study, two captive immature steller's sea eagles raised at the Ornithology Laboratory attached to Kyungsung University were surveyed for five years from Nov. 2000 to Nov. 2005. The survey indicated that the first molting began in July of the second year, and the primaries of P1-3, the secondaries of S18-19 (female), S17-18 (male), and S1 and S4 were replaced by one-time with second generation feathers. Generally molting stopped during the winter period, but a few feathers continued to molt during the winter. The two secondaries of S18-19 (female) and S17-18 (male) always molted every year but some of the juvenile secondaries (male: S10, S11, etc) retained for 2 or 3 years. In the molting order of primaries, the first molting started at P1 and it proceeded to P10 of outside. In the secondaries, the first molting started at S17(male) and S19(female), and it proceeded to outside. After that molting it started at S1 and proceeded to inside. In the other secondaries, the pattern of molting which proceeded in the mid-part of the secondaries was usually beginning in several different points at the same time. The molting seemed as if it depends on both the conditions of the individuals and the environment, so it was very difficult to explain the molting pattern in the mid-part of the secondaries. The longer quills (P7, P8) required for more than 68 days to develop. In the comparison of the length in the remiges between the first and the second generation feathers, the first generation feathers were the larger than that of the second. And the reduction of the length between the second and the third generation feathers was a few. The reduction of the length between the third and the fourth generation feathers was slight. The juvenile primaries were dark brown with a whitish base, which could be observed until the second or the third generation feathers (in their third or fourth winter plumage).