• Title/Summary/Keyword: One new species

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First Record of Gobiid Fish, Astrabe fasciata (Perciformes: Gobiidae) from Dokdo, Korea (독도에서 채집된 망둑어과 어류 1미기록종, Astrabe fasciata)

  • Kim, Dong Sik;Kweon, Seon-Man;Choi, Youn
    • Korean Journal of Ichthyology
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    • v.27 no.4
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    • pp.317-320
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    • 2015
  • The one specimen of Astrabe fasciata, belonging to the family Gobiidae was collected from the Dokdo of East Sea in Korea, and described as the first record from Korea. The specimen is characterized by having two dorsal fins, pectoral fin with free rays (five upper, two lower), protrusion on upper posterior part of supraorbital dermal fold, white spots dispersed on head and five white transverse bends on the body. We proposed its Korean name "Dok-do-eol-ruk-mang-duk-sok" and "Dok-do-eol-ruk-mang-duk" for the genus and species, respectively.

Isolation and Characterization of Ultra-Violet and Gamma-radiation Resistant Bacteria from Natural Habitats (자연 생태계로 부터 자외선 및 방사선 내성 박테리아의 분리 및 특성 연구)

  • 이영남;이인정
    • Korean Journal of Microbiology
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    • v.27 no.3
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    • pp.297-303
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    • 1989
  • Attempts to isolate the naturally occurring ultra-violet resistant bacteria from environmental sources were made. The isolates, designated No.29, 100, and 107, among numbers of bacterial isolates revealed a remarkable resistance to UV ray, whose degree of resistance in dose/response kinetics was comparable to that of an endospore-former, Bacillus subtilis. In a range of 100-300 $Jm^{-2}$/min of UV irradiation, the isolates exhibited 500-1000 fold resistance compated with E. coli. The isolated appeared to possiss cell-bound pigment of organge or crimson-red. The isolate 29 is spherical in pairs or tetrads, whereas the isolates 100 and 107 are rod. All are Gram-gositive bacteria and seemed to be non-endospore-bearer. A number of biochemical studies pursued on the isolates suggested that they are quite different to each other. Electron microscopic examination and the physiological characters of the isolate 29 suggested that this UV resistant spherical bacterium might be one species of Deinococcus, probably Deinococus radiophilus. Since there is no documents on UV resistant, Gram-positive, non-sporeformer bacillus so far, the isolates 100 and 107 might be turned out as new kinds of UV resistant bacteria occurring in nature by further investigation.

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Synthesis, Characterization, DFT Modeling and Antimicrobial Studies on the Ti(IV), Y(III) and Ce(IV) Ofloxacin Solid Complexes

  • Sadeek, Sadeek A.;Zordok, Wael A.;El-Shwiniy, Walaa H.
    • Journal of the Korean Chemical Society
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    • v.57 no.5
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    • pp.574-590
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    • 2013
  • A new solid complexes of Ti(IV), Y(III) and Ce(IV) have been synthesized with ofloxacin. The formulae and structure of the complexes have been proposed in the light of analytical, spectral ($^1H$ NMR, IR and UV-Visible), magnetic, molar conductivities and thermal studies. The complexes are soluble in DMSO-$d_6$ and DMF. The measured molar conductance values indicate that, the three complexes are electrolyte in nature. The results support the formation of the complexes and indicated that ofloxacin reacts as a bidentate ligand chelate to the metal ion through the pyridone oxygen and one carboxylato oxygen. The kinetic parameters of thermogravimetric and its differential have been evaluated by using Coats Redfern (CR) and Horowitz-Metzeger (HM) methods. The thermodynamic data reflect the thermal stability for all complexes. The metal- ligand binding of the Ti(IV), Y(III) and Ce(IV) complexes is predicted using density funcational theory at the B3LYP-CEP-31G level of theory and total energy, dipole moment estimation of different Ti(IV), Y(III) and Ce(IV) ofloxacin structures. The biological activities of the ofloxacin, inorganic salts and their metal complexes were assayed against different bacterial species.

Intelligent Control of Multivariable Process Using Immune Network System

  • Kim, Dong-Hwa
    • Proceedings of the KIEE Conference
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    • 2001.07d
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    • pp.2126-2128
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    • 2001
  • This paper suggests that the immune network algorithm based on fuzzy set can effectively be used in tuning of a PID controller for multivariable process or nonlinear process. The artificial immune network always has a new parallel decentralized processing mechanism for various situations, since antibodies communicate to each other among different species of antibodies/B-cells through the stimulation and suppression chains among antibodies that from a large-scaled network. In addition to that, the structure of the network is not fixed, but varies continuously. On the other hand, a number of tuning technologies have been considered for the tuning of a PID controller. As a less common method, the fuzzy and neural network or its combined techniques are applied. However, in the case of the latter, yet, it is not applied in the practical field, in the former, a higher experience and technology is required during tuning procedure. Along with these, this paper used the fuzzy set in order that the stimulation and suppression relationship between antibody and antigen can be more adaptable controlled against the external condition, including noise or disturbance of plant. The immune network based on fuzzy set suggested here is applied for the PID controller tuning of multivariable process with two inputs and one output and is simulated.

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Design and Fabrication of Micro-sensors Using CMOS Technology (CMOS 공정을 이용한 마이크로 센서의 설계 및 제작)

  • Lee, Sung-Pil;Lee, Ji-Gong;Chang, Choong-Won;Kim, Ju-Nam;Lee, Yong-Jae;Yang, Heung-Yol
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2007.11a
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    • pp.347-348
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    • 2007
  • On-chip micro humidity sensor, using $CN_x$ films for the sensing material, was designed, simulated, and fabricated with Op amp based readout circuit and diode temperature sensors. To compensate the temperature and other gases, two methods were applied. One is wheatstone-bridge with reference FET that eliminates other undesirable chemical species, and the other is a diode temperature sensor to compensate the temperature effect. $CN_x$ film can be a new humidity sensing material, and has a strong potential to adapt to smart sensors or multi-sensors using MEMS or nano-technology. A particular design technology for integration of sensors and systems together was proposed that whole fabrication process could be achieved by a standard CMOS process.

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Preliminary Study on a Microsporidian Isolate Occurring in the Lamerin Breed of the Silkworm Bombyx mori L. in India

  • Bhat, Shabir Ahmad;Nataraju, B.
    • International Journal of Industrial Entomology and Biomaterials
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    • v.9 no.2
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    • pp.265-267
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    • 2004
  • The silkworm, Bombyx mori L. is prone to infection of various pathogenic organisms. Pebrine, one of the deadliest disease of silkworm caused by highly virulent parasitic microsporidian, Nosema bombycis has been understood since long. Infections of the disease range from chronic to highly virulent and can result in complete lose to the sericulture industry. Several strains and species of microsporidians have since been isolated from the infected silkworms. A new microsporidian spore was isolated from Lamerin breed of the silkworm B. mori have been studied under scanning electron microscope, found to be different in spore size (length 4.36$\pm$0.06 ${\mu}{\textrm}{m}$, width 2.14$\pm$0.01${\mu}{\textrm}{m}$) and shape (ova cylindrical with slight depression) from standard strain N. bombycis (length 3.08$\pm$0.21 ${\mu}{\textrm}{m}$, width 2.01$\pm$0.05 ${\mu}{\textrm}{m}$ and ovidal respectively). In immunological test, the silkworm breed Lamerin isolated micrisporidian spore does not react to different antibody (N. bombycis, M$_{11}$ and M$_{12}$) sensitized latex particle and thus appeared to be a different strain of microsporidian parasitic to the Lamerin breed of the silkworm B. mori.i.i.

"Narrating Rights: Literary Texts and Human, Nonhuman, and Inhuman Demands"

  • Kim, Youngmin
    • Journal of English Language & Literature
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    • v.64 no.3
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    • pp.483-530
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    • 2018
  • Unpacking and dispersing rights of various kinds formerly enjoyed by a selected few has been the constant motivation behind the democratization and modernization of human society. Human rights and later civil rights have continuously been constituted and reconstituted in response to the demands of the laboring class, slaves, women, subalterns, animals, and things, expanding beyond the boundaries of class, race, nation, sexuality, gender, species and organism. Calling attention to the ways in which literary and cultural texts have narrated rights so as to inscribe these human, nonhuman, and inhuman demands. Narrating rights offer opportunities to interrogate the lasting contributions of English language and literature to questioning, reforming, and practicing rights. The interrogation is particularly pertinent in this age in which revised and dispersed rights are creating new conflicts, requiring them to be narrated differently and imaginatively so as to allow all the parties in conflict to participate in working out the conflicts. With the 2017 theme of "Literature and Human Rights," JELL editorial collective hope to explore the relationship between literature and human rights in its multiple simultaneous, and plural manifestations in an open platform. "Narrating Rights" is a double-edged task that, on one hand, reflects the singular life conditions or contexts of a human, inhuman or nonhuman being and, on the other hand, aspires to the perpetual process of rights' universal application. Eleven out of all the keynote speakers at the 2017 ELLAK Convention were invited to this roundtable on Literature and Human Rights. The following transcription includes the dialogues of the eleven discussants.

Molecular Identification and Technological Properties of Acetic Acid Bacteria Isolated from Malatya Apricot and Home-Made Fruit Vinegars

  • Buyukduman, Eda;Kirtil, Hatice Ebrar;Metin, Banu
    • Microbiology and Biotechnology Letters
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    • v.50 no.1
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    • pp.81-88
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    • 2022
  • Acetic acid bacteria (AAB) are versatile organisms involved in the production of variety of fermented foods, such as vinegar and kombucha, and products of biotechnological relevance, such as bacterial cellulose. In the present study, Malatya apricot, a variety with protected designation of origin (PDO), and vinegar samples produced using various fruits were used to isolate AAB. The 19 AAB isolates obtained were typed using (GTG)5 fingerprinting, and the ones selected were identified by sequencing either 16S rDNA alone or in combination with 16S-23S rRNA internal transcribed spacer region or ligA gene. While all apricot isolates (n = 10) were Gluconobacter cerinus, vinegar isolates (n = 9) were composed of Komagataeibacter saccharivorans, Acetobacter syzygii, and possible two new species of AAB, Komagataeibacter sp., and Gluconobacter sp. (GTG)5 fingerprinting showed the presence of several genotypes of G. cerinus in the apricot samples. Screening for some technologically relevant properties, including thermotolerance, ethanol tolerance, and cellulose production capability, showed that all Komagataeibacter and some Gluconobacter isolates could tolerate the temperature of 35℃, and that vinegar isolates could tolerate up to 8% ethanol. One isolate, Komagataeibacter sp. GUS3 produced bacterial cellulose (1 g/l) and has the potential to be used for cellulose production.

Neuroprotective Activity of Boesenbergia rotunda Against Glutamate Induced Oxidative Stress in HT22 Cells (글루타메이트에 의해 산화적 스트레스를 받은 HT22 세포에서 핑거루트의 신경세포 보호활성)

  • Kim, Eun Seo;Ma, Choong Je
    • Korean Journal of Pharmacognosy
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    • v.53 no.2
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    • pp.79-86
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    • 2022
  • Excessive glutamate causes oxidative stress in neuronal cells, which can cause degenerative neurological disorders. We tried to find medicinal plant showed neuroprotective activity by using glutamate-injured HT22 cell as a model system. In this study, we found that Boesenbergia rotunda methanol extract showed neuroprotective activity against glutamate induced neurotoxicity in mouse hippocampal HT22 cells. B. rotunda methanol extract suppressed the formation of reactive oxygen species and decreased intracellular Ca2+concentration. Also, B. rotunda made mitochondrial membrane potential maintain to normal levels. In addition, B. rotunda increased total glutathione amount and activated antioxidative enzyme such as glutathione reductase and glutathione peroxidase compared to glutamate-treated groups. These results suggested that B. rotunda decreased neuronal cell death damaged by high concentrations of glutamate treatment, via antioxidative mechanism and might be one of candidate of development of new drug to treat neurodegenerative disease such as Alzheimer's disease.

A checklist of endemic plants on the Korean Peninsula II

  • Gyu Young CHUNG;Hyun-Do JANG;Kae Sun CHANG;Hyeok Jae CHOI;Young-Soo KIM;Hyuk-Jin KIM;Dong Chan SON
    • Korean Journal of Plant Taxonomy
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    • v.53 no.2
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    • pp.79-101
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    • 2023
  • Following recent taxonomic, distributional, and nomenclatural revisions, an updated checklist of endemic plants on the Korean Peninsula is needed. This study provides an updated checklist of vascular plants endemic to the Korean Peninsula and describes their distribution within administrative provinces. The revised checklist includes 373 endemic taxa (304 species, six subspecies, 49 varieties, and 14 nothospecies) from 179 genera and 64 families, representing 9.5% of the total native flora of the Korean Peninsula. Asteraceae (41 taxa), Ranunculaceae (29 taxa), Liliaceae s.l. (24 taxa), and Rosaceae (22 taxa) were the most widely represented families. Compared with the most recent checklist published in 2017, 39 taxa were excluded from the checklist; one taxon was excluded because it did not have a valid published name, seven taxa were excluded because their natural habitats extended to neighboring countries, four taxa were excluded because they were treated as a rank form, and 27 taxa were excluded because they had been identified as heterotypic synonyms of taxa distributed outside of the Korean Peninsula. Fifty-two new taxa were included based on the literature. This checklist will help to focus conservation efforts and provide a framework for research, protection, and policy implementation related to these endemic taxa.