• Title/Summary/Keyword: White spots

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First Record of the Giant Grouper Epinephelus lanceolatus (Perciformes: Serranidae: Epinephelinae) from Jeju Island, South Korea

  • Myoung, Jung-Goo;Kang, Chung-Bae;Yoo, Jae Myung;Lee, Eun Kyung;Kim, Sung;Jeong, Choong-Hoon;Kim, Byung-Il
    • Fisheries and Aquatic Sciences
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    • v.16 no.1
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    • pp.49-52
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    • 2013
  • A single specimen of Epinephelus lanceolatus, belonging to Epinephelinae of the family Serranidae, was newly collected from Jeju Island, South Korea, in December 2009. Epinephelus lanceolatus is characterized by anterior lateral-line scales with branched tubules, cycloid scales, irregular white spots, and fins with numerous small black spots. We propose a Korean name, "Dae-wang-ba-ri' for this species.

First Report of Anthracnose Caused by Colletotrichum nymphaeae on Strawberry Fruits in Korea

  • Je Hyeok Yoo;Myung Soo Park;Doo Hee Yi;Myeong Hyeon Nam
    • The Korean Journal of Mycology
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    • v.52 no.2
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    • pp.109-114
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    • 2024
  • Anthracnose fruit rot (AFR) has been observed in greenhouses during the harvesting period in the Chungnam Province of South Korea. Fruits infected inside the greenhouse show black or brown spots, orange conidial masses and in some areas of the infected parts, white fungal growths are visible. The size of these spots gradually expands, leading to the necrosis of the fruits and flowers. Three isolates were obtained from infected fruits and identified as strains of the Colletotrichum acutatum species complex based on morphological characteristics. Multilocus sequence analysis of actin, chitin synthase, glyceraldehyde-3-phosphate dehydrogenase genes, and internal transcribed spacer rDNA regions revealed that the isolates belong to a monophyletic group with the type strain of C. nymphaeae. This is the first time C. nymphaeae has been confirmed in strawberry fruit in Korea.

Studies on the Substances Contained in Gyrophora Esculanta Lowering Plasma and Liver Cholesterol Levels Part III. On the Chemical Structure of the Compounds Contained in Gyrophora Esculanta (석이버섯(Gyrophora Esculanta)중에 함유되어있는 간장 및 혈장 Cholesterol 의 저하 생리활성물질에 관한 연구 -석이버섯중에 함유되어 있는 Cholesterol의 저하성 물질의 화학구조 관한 연구)

  • 김천호
    • Journal of Nutrition and Health
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    • v.19 no.3
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    • pp.155-160
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    • 1986
  • This study was conducted to purify and characterize further a potent cholesterol lowering material found in Sogi. The ethanol extract of Sogi was purified with acetone and ethanol, and a white powder was obtained. This material yielded t재 spots on a Silicagel thin layer chromatogram. The major material identified by M.P. measurement, elementary analysis and spectrography was considered to be gyrophoric acid. Beside this, minor components (orsellic and leccanolic acids ) were detected.

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First Record of Epinephelus areolatus (Perciformes: Serranidae) from Korea

  • Kim, Maeng-Jin;Song, Choon-Bok
    • Fisheries and Aquatic Sciences
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    • v.13 no.4
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    • pp.340-342
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    • 2010
  • One specimen of Epinephelus areolatus, belonging to the subfamily Epinephelinae of the family Serranidae, was collected by a hook from commercial longline fisheries in the coastal waters of Jeju Island, Korea. This species is mostly similar to E. chlorostigma, but the former is distinguished from the latter by having larger brown spots and a white posterior margin on the caudal fin. We propose a new Korean name "Dae-moon-ba-ri" for E. areolatus.

Hepatic coccidiosis(Eimria stiedae) in rabbits (토끼 간콕시듐(Eimeria stiedae) 감염 증례)

  • 한재철;한규삼;이성희;마쓰다기꾸;임병무;임채웅
    • Korean Journal of Veterinary Service
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    • v.24 no.1
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    • pp.15-19
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    • 2001
  • Hepatic coccidiosis was occurred in a rabbit farm in Chonbuk province. Clinically, rabbits showed anorexia, diarrhea, dehydration, and depression, subsequently died 3 - 5 days after onset of clinical signs. Grossly, multifocal white spots or lines on the liver suface were observed. Histopathologic lesions included hyperplasia of bile duct epithelium with infiltration of inflammatory cells such as plasma cells and granulocytes, which represents chronic pericholangitis. Different developmental stages of Eimeria stiedae were observed inside the epithelium of biliary system. This is the case of hepatic coccidiosis in rabbits.

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Change of Lacquer Surface by Radiation (방사선에 의한 옻칠표면의 변화)

  • Yoon, Guk-joung
    • Journal of Radiation Industry
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    • v.12 no.4
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    • pp.333-336
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    • 2018
  • Natural lacquer was cured at room temperature at a relative humidity of 60% at $27^{\circ}C$ to obtain a lacquer film. Photolysis of lacquer was investigated by irradiating 1~75 kGy of gamma ray to this lacquer film. No significant changes were observed in the range of 1~10 kGy radiation. As the radiation doses were increased, the white spots were increased in the scanning electron microscope photographs. The increase of the white dots of the lacquer surface shows that the lacquer is degradation by radiation. As a result of IR spectral analysis of the lacquer surface with increasing irradiation dose, there was no significant change in $3,445cm^{-1}$ hydroxide group, $2,900cm^{-1}$ hydrocarbon group, and $993cm^{-1}$ triene group. However, the $1,745cm^{-1}$ carbonyl group was found to increase, and the $1,715cm^{-1}$ unsaturated hydrocarbon group and the $1,463cm^{-1}$ methylene group showed a tendency to decrease.

Discrimination Method of Brown Planthopper, Nilaparvata lugens(Stal) Nymphs by the Fluorescent Spots between Compound Eyes in Rice Paddies (벼논에서 벼멸구(Nilaparvata lugens Stal)약충 두부의 형광성 반점에 의한 식별법)

  • 조성래;이동운;추호렬;박정규;신현열;김형환
    • Korean journal of applied entomology
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    • v.42 no.4
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    • pp.361-365
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    • 2003
  • Several species of planthoppers such as brown planthopper, N. lugens (Stal) (BPH), smaller brown planthopper, Laodelphax striatellus (Fall n) (SBPH), and white-backed planthopper, Sogatella furcifera (Horv th) (WBPH) are distributed in Korean rice paddies but not easy to discriminate them in situ. Accurate discrimination of them is an indispensable process in the forecasting for their outbreak and control. Especially, innovative discrimination method for BPH was required because BPH was one of the most important insect pest of rice. Nymphs and adults of BPHs, SBPHS, and WBPHS, thus, were examined their morphological characteristics in the paddies and laboratory. The nymphs of BPH had different characters from those of SBPH and WBPH. The nymphs of BPH had white fluorescent spot between bottom of compound eye and antenna, while there was no that spot the other two species. The white spot was the brightest at the nymphs just after hatching and getting weaker as the nymph developed. At last the white spot was totally disappeared at the adult stage. This white spot was innovative criterium to discriminate nymphs of BPH, SBPH, and WBPH in rice paddies.

A New Record of the Family Ophichthidae (Pisces), Ophichthus erabo (Jordan and Snyder 1901), from Korea (한국산 바다뱀과(Ophichthidae) 어류 1미기록종, Ophichthus erabo(Jordan and Snyder, 1901))

  • Kang, Chung-Bae;Kim, Jin-Seok;Kim, Jin-Koo;Ji, Hwan-Sung;Yoon, Moongeum;Park, Jin Woo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.52 no.4
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    • pp.418-423
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    • 2019
  • We report the first occurrence of Ophichthus erabo (Jordan and Snyder, 1901) collected in the waters around Jeju Island. The morphologic characteristics of this species include rich brown semicircular spots distributed on the head, the back, and the dorsal fins. Ophichthus erabo has a similar body color to Ophichthus polyophthalmus but can be clearly distinguished from the latter by the number of vertebrae (152-155 in O. erabo vs. 147-149 in O. polyophthalmus) and the existence of a white spot at the center of a semicircle (i.e., no white spot in O. erabo vs. a white spot in O. polyophthalmus). We suggest a new Korean name for O. erabo to be "Mul-bang-ul-ba-da-baem-gang-eo".

Comparative Analysis of Muscle Proteome from Porcine White and Red Muscles by Two-dimensional Electrophoresis (이차원전기영동법을 이용한 white muscle과 red muscle간의 단백질 발현양상의 비교분석)

  • Kim, N.K.;Joh, J.H.;Chu, K.S.;Park, H.R.;Park, B.Y.;Kim, O.H.;Lee, C.S.
    • Journal of Animal Science and Technology
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    • v.45 no.5
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    • pp.731-738
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    • 2003
  • The technique known as proteomics is useful for characterizing the protein expression pattern of a particular tissue or cell type as well as quantitatively identifying differences in the levels of individual proteins. In present study, we carried out the comparative expression patterns of white and red muscles. We used the two-dimensional electrophoresis(2-DE) for analyzing the protein expression. Proteins isolated from porcine white and red muscles were separated by 12% poly-acrylamide gel and then were detected by coomassie blue and silver staining. More than 600 protein spots were detected on each 2-DE gel. By visual analysis of the stained gel, five proteins were identified to be differentially expressed in the white vs red muscle. By database searching based on the molecular weights and pI(isoelectric point) of the five proteins, three of them were found to be most close to troponin I, T and myoglobin. However, further researche is needed for identification and functional analysis of the unidentified proteins. In conclusion, we found five proteins, which are differentially expressed in the white vs red muscle. The functional analysis of the differentially expressed proteins will provide valuable information on biochemical characteristics of the muscle type.

Improvement of Predictive and Corrective Inspection Methods to Control Nosema bombycis Infection in the Silkworm, Bombyx mori

  • Nguyen, Mau-Tuan;Jon
    • Journal of Sericultural and Entomological Science
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    • v.39 no.2
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    • pp.146-153
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    • 1997
  • The microsporidian infection with Nosema bombycis, reconfirmed its high virulence and transovarial tranmissibility, however, the characteristic symptom of the spots like pepper grains on the diseased larval skin was no more recognized by present varieties of the silkworm. Transovarial transmission rate detected from moth was above 90% in dead eggs or dead larvae in the rearing by mulberry leaves, 80% in the newly hatched larvae starved to death. Transovarially transmitted N. bombycis was easily observed from dead eggs and larvae, and were suggested an individual inspection of a few of dead eggs for detection of the pathogenic spores. The progeny population provided indicative factors on the sampling of predictive and corrective inspection. The higher concentration of N. bombycis spores included in the hindabdormal part of infected moth, applicative on the simple method of indivisual moth inspection. For the predictive inspection of growned 5th-instar larvae, N. bombycis infection was detectable without microscopic observation by the unique symptom of turbid milky-white spots on the silk gland. Inspection of the meconia artificially discharged from silkworm moth, was also succesful of microscopic observation before crossing, without killing or homogenize the moths. The results provided a basis of rational methods for the inspection of N. bombycis infection of the silkworm.

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