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Bipolar Membranes and Their Applications

  • Strathmann, H.
    • Membrane Journal
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    • v.11 no.3
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    • pp.97-108
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    • 2001
  • Bipolar membranes have gained increasing interest as a tool for an efficient production of acids and bases from the corresponding salts. A large number of potential applications have been identified in the chemical and biochemical industry have been identified and evaluated on a laboratory scale. In spite of extensive research efforts and laboratory and pilot plat test, there are hardly any large-scale commercial plants. In this paper the basic concept of the electrodialytic water dissociation with bipolar membranes are briefly reviewed. The limitations of today\`s bipolar membranes are indicated. Selected examples of successful applications of the bipolar membrane technology are discussed.

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Identification of Streptomyces species antagonistic to Fusarium solani causing Ginseng root rot (인삼 뿌리썩음 병균, Fusarium solani에 길항적인 Streptomyces species의 동정)

  • 정영윤;정후섭;오승환
    • Korean Journal of Microbiology
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    • v.20 no.2
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    • pp.73-79
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    • 1982
  • Among 131 isolates of Strptomyces obtained from ginseng cultivating soil, the two isolates ST59 and ST129 showing high antagonistic activity to Fusarium solani(Mart.) Appel & We. causing ginseng root rot were identified. The two isolates were identified Streptomyces alboniger Porter, et al. and Strptomyces reseolilacinus Pridham, et al., respectively, based on mrophology, cultural, and physiological characteristics on various culture media. Spore chains of ST59 and ST129 were flexuous(RF) and coiled(S). Spore surfaces of two isolates were all smooth. Aerial mass color of ST59 was white series and ST129 red series.

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Analyses of Security Model and Design of Protocol for Wireless Ad-Hoc Network (무선 Ad-Hoc 망의 프로토콜 설계 및 보안 모델 해석)

  • Kim, Jung-Tae
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.1
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    • pp.860-863
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    • 2005
  • Ad-Hoc networks are a new generation of networks offering unrestricted mobility without any underlying infrastructure. Primary applications of Ad-Hoc networks are in military, tractical and other security sensitive operations, where the environment is hostile. Hence, security is a critical issue. In this paper, we ahve identified certain misbehaviors caused by mallicious node for reactive routing protocol. We also discuss the intrusion detection and intrusion prevention model to prevent several identified attacks in the networks

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Blind Signature Scheme with Explicit Identified Receiver (명시적 수신자 은닉 서명)

  • 정익래;이동훈
    • Proceedings of the Korean Information Science Society Conference
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    • 2003.04a
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    • pp.257-259
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    • 2003
  • 본 논문에서는 전자화폐 시스템의 인출 프로토콜의 안전성에 관해서 고찰한다. 익명성을 제공하는 인출 프로토콜에서는 사용자 인증과 더불어 은닉 서명을 동시에 사용한다. 먼저 은닉 서명을 분류하고, 이들 은닉서명 프로토콜과 사용자 인증 프로토콜의 결합 방식 중에서 인증후 은닉서명 방식(Identification-then-Blind Signature)에 대한 공격을 설명한다. 그리고 인증과 은닉서명을 동시에 하는 방식(Identification-and-Blind Signature)을 이용해서 명시적 수신자 은닉 서명(Blind Signature Scheme with Explicit Identified Receiver)을 제안하며, 그것들의 안전성에 대해서 분석한다.

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Severe Fever with Thrombocytopenia Syndrome Patients with Hemophagocytic Lymphohistiocytosis Retrospectively Identified in Korea, 2008-2013

  • Kim, Kye-Hyung;Lee, Myung Jin;Ko, Mee Kyung;Lee, Eun Yup;Yi, Jongyoun
    • Journal of Korean Medical Science
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    • v.33 no.50
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    • pp.319.1-319.5
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    • 2018
  • The incidence of severe fever with thrombocytopenia syndrome (SFTS) has increased in Korea since a first report in 2013. We investigated whether SFTS existed before 2013 using real-time reverse transcription polymerase chain reaction and stored blood samples from febrile patients with thrombocytopenia. Four cases of SFTS were identified, with the earliest occurring in 2008.

First Reports of Unrecorded Mortierellomycetes and Umbelopsidomycetes Fungi from Freshwater Ecosystems in Korea

  • Jaeduk Goh;Yoosun Oh;Hye Yeon Mun
    • The Korean Journal of Mycology
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    • v.51 no.3
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    • pp.155-165
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    • 2023
  • In this study, we isolated several fungal strains from filtered water and sediment collected from rivers and streams. The strains were identified by molecular phylogenetic analyses of rDNA sequences (internal transcribed spacer [ITS], large subunit of ribosomal DNA [LSU]). The morphological characteristics of the fungi were investigated using microscopy, and the culture characteristics of fungi grown on several media were examined. We identified four species previously unknown in South Korea, namely, Dissophora globulifera, Linnemannia exigua, Mortierella rishikesha and Umbelopsis autotrophica.

Two Unrecorded Macrofungal Species from Sohwangbyeongsan in Korea

  • Minkyeong Kim;Jin Sung Lee;Hyun Lee;Changmu Kim
    • The Korean Journal of Mycology
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    • v.52 no.1
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    • pp.25-33
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    • 2024
  • Indigenous fungi from Mount Sohwangbyeongsan, Odaesan National Park, Pyeongchanggun, Gangwon-do, South Korea, were investigated between 2013 and 2016. Our survey identified a total of 137 macrofungi species. These species were systematically categorized into 2 phyla, 4 classes, 15 orders, 41 families, and 73 genera. We identified collected specimens to the species level based on their morphology and rDNA sequences. Two species-Lentinellus flabelliformis and Tricholoma stans were newly recorded as macromycota in Korea.

A Pilot Study on Emissions of Air Pollutants Produced from Incineration of Some Municipal Solid Wastes

  • Kim, Haen-Gah;Lee, Byeong-Kyu;Cho, Jung-Bum
    • Journal of Korean Society for Atmospheric Environment
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    • v.22 no.E2
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    • pp.49-56
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    • 2006
  • This pilot study focuses on emissions characterization of air pollutants produced from incineration of some municipal solid wastes (MSWs). The MSWs incinerated by an electric furnace maintained up to $600^{\circ}C$ included food, paper, and plastic wastes. The pollutants analyzed in this study included concentrations of volatile organic compounds (VOCs), bottom ash contents, and heavy metals extracted from the bottom ash of each waste. The VOCs identified were classified based on their chemical structure. The total emissions of VOCs produced from incineration of the papers were identified as the highest followed by those from the plastics and the food wastes. Aliphatic alkenes were major VOC compounds produced from incineration of plastic or food wastes, while furans were major VOCs produced from incineration of papers. The second major VOCs produced from incineration of food, plastics, and papers were aromatics. In particular, hazardous air pollutants such as benzene were produced with considerable amount of emission concentration. The bottom ash contents of papers were usually much higher than those of food or plastic wastes. The bottom ash contents produced from incineration of food and plastics were much lower than those of other MSWs. In analysis of heavy metals extracted by an ultrasonic method from the bottom ashes of the papers, high concentrations of heavy metals were identified from incineration of newspapers and box (cardboard). In addition, it was identified that the general public might be exposed to considerable amounts of lead concentrations during incineration processes and uses of paper cup and from ashes.

Species Identification of Wooden Members in the Youngsanjeon Hall of Sucknamsa Temple (안성 석남사 영산전 목부재의 수종 분석)

  • Park, Won-Kyu;Jeong, Hyun-Min;Kim, Sang-Kyu
    • Journal of the Korean Wood Science and Technology
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    • v.36 no.1
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    • pp.1-11
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    • 2008
  • The purpose of this study is to examine the species of wooden members used in the Youngsanjeon Hall of the Sucknamsa temple in Anseong, Korea. Ninety-five wood samples from pillars, head-penetrating ties, beams, corner rafter, rafter, floor board and other wood members were identified. Seven species identified were hard pine, exotic pine, Zelkova serrata, Ginkgo biloba, Diospyros, Quercus(Cerrus) and Pyrus spp. In the case of pillars, eight were hard pines and the others Zelkova and Pyrus. Species of angle rafter were Ginkgo biloba and Zelkova. and those of beams were one hard pine and one Zelkova. Two purlin samples were Quercus(Cerrus) and rafters were hard pines except one Ginkgo and one exotic pine. Roof-filling timbers were identified as Zelkova and Diospyros spp. The other samples of roof-filling timbers were all identified as hard pines. The use of Ginkgo and several hardwoods in addition to hard pines may indicate supply of local logs near the Sucknamsa temple.

Analyses of single nucleotide polymorphisms and haplotypes of BoLA-DRB3 gene in Holstein and Hanwoo (홀스타인종과 한우에 있어서 BoLA-DRB3 유전자의 단일염기다형과 반수체 분석)

  • Jeong, Hang-Jin;Yu, Seong-Lan;Hoque, M.R.;Lee, Jun-Heon;Do, Chang-Hee;Ryoo, Seung-Heui;Sang, Byung-Chan
    • Korean Journal of Agricultural Science
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    • v.38 no.1
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    • pp.51-63
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    • 2011
  • BoLA (bovine leukocyte antigens) have been known as gene complex related with bovine diseases and immunological traits. This study was conducted to find out the characteristics of BoLA-DRB3 gene related to mastitis and BL(bovine leukocyte) from 280 cattle [193 animals of Holstein cattle and 87 animals of Hanwoo]. As a result, five PCR-RFLP types (b, d, e, f and g) using HaeIII restriction enzyme, three BstYI restriction patterns (b, d and e) and eight RsaI restriction types(b, d, f, I, j, n, o and w) were identified. Moreover, we identified new d' type ($197{\rightarrow}175$/22), having one more cutting site by BstYI enzyme than d type allele and n' type ($180{\rightarrow}169$/11) having one more cutting site by RsaI enzyme than n allele was additionally identified. Next, we identified 53 SNPs in BoLA-DRB3 exon2 from 280 cattle. SNP frequency and heterozygosity of Holstein and Hanwoo were investigated in all the SNP genotype. These results might be based on research for identifying marker associated with bovine diseases.