• Korean Journal of Veterinary Service
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• v.33 no.1
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• pp.7-12
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• 2010

There are several immunosuppressive viral diseases in chickens such as avian adenovirus (AAV), chicken anemia virus (CAV), infectious bursal disease (IBD) and Marek's disease (MD). In this study, we have investigated two broiler chicken farms suffered from high mortality in Jeonbuk in July to August 2009. Clinically high fever and growth retardation were observed in the diseased chicken. In necropsy, the hemorrhages in thigh leg and thymus, hemorrhages and enlargement of liver, kidney and proventriculus, and yellowish fluid in heart were seen. Histologically, necrotic foci and basophilic intranuclear inclusion bodies of hepatocytes, hemorrhages and infiltrated lymphocytes in kidney and proventriculus were observed. By using polymerase chain reaction (PCR), the genes of avian adenovirus, CAV and ND virus were detected in specimens. We suggested that these coinfection cases with high mortality were due to primarily infection of immunosuppressive diseases such as avian adenovirus, CAV, followed by secondary infection of Newcastle disease (ND) virus.

• 한국문화재보존과학회:학술대회논문집
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• 2004.10a
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• pp.72-74
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• 2004

The color change of lead-containing pigments is one of the most serious diseases in watercolor, oil paintings and wall paintings. These pigments have a tendency to darken or brighten. It was proved that oxidation of lead containing pigments in the formation of brown-colored lead dioxide is a photochemical reaction under high humidity conditions. Therefore, we carried out some analogic experiments on the color change of three typical lead containing pigments ; $Pb_3O_4$, Pbo and $PbCo_3{\cdot}Pb(OH)_2$ at the conditions of illuminations under the high humidity ($2PbCo_3{\cdot}Pb(OH)_2$ R. H.). The reason for the chemical reactions are discussed and the results of these experiments are shown in some spectrograms, micrographs and X-ray micro-diffraction patterns. Important conclusions were drawn in our research. Due to the formation of brown $PbO_2$, red lead $(Pb_3O_4)$ and massicot (PbO) turned brown or dark when they were illuminated light under high humidity. We noticed that the brightening of red lead occurred d to admixture with chalk or lead white in egg yolk or linseed oil medium on exposure to light. Lead white used in oil paintings turned yellowish on dark.

• Asian Journal of Atmospheric Environment
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• v.2 no.1
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• pp.26-33
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• 2008

In order to fully understand the chemical properties of Asian dust particles, especially their transformation and aging processes, it is desirable to investigate the nature of original sands collected at local source areas in China. This study presents the detailed properties of sands collected at four different desert regions (Yinchuan, Wuwei, Dulan, and Yanchi) in China. Most of sands have irregular shape with yellowish coloration, whereas some of them show peculiar colors. The relative size distribution of sands collected at Yinchuan, Wuwei, and Dulan deserts exhibits monomodal with the maximum level between 200 and $300{\mu}$, whereas that of Yanchi desert is formed between 100 and $200{\mu}$. The mass concentration ratio of each element to that of Si (Z/Si) determined by PIXE analysis has a tendency towards higher Z/Si ratios for soil derived elements. It was possible to visually reconstruct the elemental maps on the surface of individual sands by XRF microprobe technique. In addition, the multielemental mass concentration could be quantitatively calculated for numerous spots of desert sands.

• Journal of the Korean Society of Food Science and Nutrition
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• v.23 no.1
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• pp.125-129
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• 1994

The acetone extracted pigment from the cell mass of Rhodophila globiformis DSM 161 was generally red. In a pH 5-6 condition, the color of pigment was red, while in p/h 7-9 condition it was yellowish red. The pigment was stable at pH range between 6.0-11.0 and below 4$0^{\circ}C$. In the presence of light and oxygen , the pigment was rapidly degraded and became unstable in the presence of metal ions such as Fe3++(1.0$\times$ 10-2M, 1.0$\times$10-3 M), Al3+ (1.0$\times$10-2 M, 1.0$\times$10-3 M) and Zn2+(1.0$\times$10-2 M). But in the presence of Zn2+ (1.0$\times$10-2M). But in the presence of Zn2+ (1.0$\times$10-3 M) it was very stable. Through visible absorption scanning ,it showed five sharp absorption peaks at 358 , 385, 494, 680 ad 748 nm with three shoulder peaks at 410, 466 and 522nm. On the results of TLC analysis , it was shown to be composed of seven color fractions.

• Korean Journal of Ichthyology
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• v.31 no.4
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• pp.249-254
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• 2019

One specimen of Albula argentea (296.3 mm in standard length), belonging to the family Albulidae, was collected in a set net in the coastal waters of Jejudo Island, Korea. As the adult A. argentea has not been caught from Korean waters, we described its morphological characters based on the collected specimen and compared them with those of the previous reports on A. argentea and A. koreaus. As a result, the present specimen was characterized by having 68~73 pored lateral line scales (vs. 77~78 for A. koreana), 72~73 vertebrae pored lateral line scales (vs. 77~80) and none streak on the check (vs. yellowish streak). Molecular analysis using the mitochondrial cytochrome b DNA sequences was also conducted to confirm the correctness of species identification and taxonomic status of the sample.

• Korean Journal of Veterinary Service
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• v.37 no.1
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• pp.67-71
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• 2014

In November 2012, a 4-month-old foal with anorexia, neurologic signs with ataxia and death was submitted for necropsy to the diagnostic laboratory of Jeju Self-Governing Provincial Veterinary Research Institute. Grossly, yellowish-white fibrinous materials were seen on the ventral cerebrum, cerebellum, medulla oblongata and cervical spinal cord of the foal. Histologically, severe fibrino-purulent meningitis characterized by the infiltration of neutrophils and fibrionous exudates with bacterial colonies were presented in cerebrum, cerebellum, brain stem and cervical spinal cord. In the bacterial isolation using meningeal exudate, the small white colonies on blood agar plate with ${\beta}$-hemolysis were observed. Isolated bacteria were Gram-positive cocci and confirmed as Streptococcus (S.) equi subsp. zooepidemicus by VITEK 2 system. Based on the histopathological features and the bacterial test, this case was diagnosed as meningitis associated with S. equi subsp. zooepidemicus infection in a foal. In our best knowledge, this is the first report for fibrino-purulent meningitis caused by S. equi subsp. zooepidemicus infection in Jeju.

• Journal of Environmental Health Sciences
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• v.1 no.1
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• pp.14-17
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• 1974

A study was carried out to detect of illegal artificial dyes, and to confirm the used rate of illegal dyes in the production process of commercial drops (candy), from Dec. 10, 1972 to Feb. 10, 1973. In this study, it was used thin layer chromatography, the samples were divided into two groups, group A of inscribed trade name and group B of not inscribed trade name. To contrast with group A and group B, 100 samples were randomly collected in the market places, 50 samples from group A and 50 samples from group B. The following conclusions were obtained: 1) used rate of illegal dyes were 2% of group A and 9% of group B. 2) used rate of illegal dyes were 2% of red, 2% of yellow, 1% of violet and 6% of green, not in blue. 3) used rate of illegal dyes 3% of Rhodamine B, 3% of Auramine and 6% of Light green S.F. Yellowish. 4) Out of 20 cases those used mixed dyes, only one case was confirmed as two illegal dyes, and 4 cases were used one illegal dye.

• Journal of the Korean Ceramic Society
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• v.29 no.10
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• pp.822-826
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• 1992

SiO2 doped sapphire single crystals were grown by Verneuil method using feed material which prepared by adding SiO2 in Al2O3. Crystal growing were attempted with varing doping amount of SiO2 from 0.01 to 1.0 wt% and when the doping amount of SiO2 were 0.01~0.04 wt%, single crystals could be attained. Starting materials for feed powder were 99.99% purity alumina and extra pure SiO2 powder. Mixing these two materials by wet milling for 24 hours and drying the mixture and then was calcined at 900~110$0^{\circ}C$ for 2~4 hours. The grown crystals had yellowish color and were somewhat transparent. During growing process the flow range of oxygen was 5~7.5ι/min and of hydrogen was 13~25ι/min, the average growth rate was 7.0~11 mm/hr. The pressure of gases were fixed at 5psi. The color of crystal was appeared and mechanical property of sapphire was developed by doping of SiO2.

• Preventive Nutrition and Food Science
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• v.7 no.1
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• pp.52-56
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• 2002

This study was conducted to evaluate the possibility of gamma radiation for reducing egg allergies through the observation of conformational and allergenic changes of egg ovomucoid (OM) in basic pH conditions. An OM solution of 2.0 mg/mL was individually prepared with different pH conditions, pH 7.0, 9.0 or 10.0, and was irradiated with the absorbed dose of 10 kGy. Irradiated OM solutions were tested by Ci-ELISA formatted with egg-hypersensitive patients'IgE. Binding abilities of IgE to OM in irradiated solution decreased with the increase of pH. Turbidity of the solution highly increased by irradiation and the increase of pH. A yellowish color was observed in the irradiated OM solution of basic condition. Coagulation of OM by irradiation decreased with the increase of pH, when observed by SDS-PAGE.

• Journal of the Korean Institute of Landscape Architecture
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• v.32 no.4
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• pp.1-6
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• 2004

This study was carried out to investigate the effects of light intensities on the growth and net photosynthesis of Piper kauzura under different shading levels : 0％, 50％, 70％ and 90％ of sunlight. Mortality rate was lowest under a 70％ shading level but 0％ and 90％ shading levels were about 46％ and 53％ each respectively. Plant height was shorter and leaf size was smaller and yellowish under a 0％ shading level but increased when light intensity was decreased. However, under a 90％ shading level, growth of Piper kauzura was inferior to other treatments. Top fresh weight was about 11.24g under a 50％ shading level and about two times higher than that observed in about 6.6g under a 90％ shading level. Root fresh weight was about 7.7g under a 0％ shading level and was about two times higher than that showed in about 3.84g and 3.64g under 90％ and 70％ respectively. Total chlorophyll content and chlorophyll a/b rate were increased when light intensity was decreased. Net Photosynthesis achieved the highest under a 70％ shading level and maximum photosynthetic photon flux density was 150 molㆍm/sup -2/ㆍs/sup -1/. Therefore, growth of Piper kauzura was good under 50∼70％ shading, Meaning that it is an indoor plant that could be highly utilized.