• Title/Summary/Keyword: clone

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Molecular Coning of cDNA for Garlic Mosaic Virus Genome (마늘 모자이크 바이러스 게놈에 대한 cDNA의 클로닝)

  • 최연희
    • Journal of Plant Biology
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    • v.35 no.3
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    • pp.253-257
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    • 1992
  • Potyvirus group is the largest group among plant virus groups and damages severely plant hosts upon infectiQn. In order to investigate the mechanism by which potyviruses induce disease in plants, a cDNA clone 29-6 which is cOIlsidered to be a cDNA clone for garlic mosaic virus (GMV) was isolated. It did not hybridize to garlic latent virus genome, which is one of two major garlic viruses. Northern blot analysis shows that the genome size of garlic mosaic virus was about 9 kb. Clone 29-6 strongly hybridizes to poly(A) RNA isolated from garlic leaves, suggesting that GMV RNA is polyadenylated as other potyviruses. Nucleotide sequence analysis of cDNA clones overlapping with clone 29-6 showed that garlic plants are infected with various strains of garlic mosaic virus which are closely related to each other. other.

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Use of Zymography for Identification of the Same Clone in a Clone Bank of Pinus densiflora Sieb. et Zucc (Isoperoxidase 변이형(變異型)에 의(依)한 소나무 Clone 감별(鑑別))

  • Park, Young-Goo;Choi, Jung Suk
    • Journal of Korean Society of Forest Science
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    • v.18 no.1
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    • pp.17-22
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    • 1973
  • Using of zymography for identification of same clone of Pinus densiflora, the two year old needle leaves of 48 ramtes including 8 clones (6 ramets per clone) were collected in the clone bank which has been established on the near campus of Institute of Forest Genetics, Suwon, in 1962. All 8 bands are named from cathod to anode, G, H, K, M, N, Q, S and Y. Only CB-1 clone shows all bands, while KW-3 clone reveals only 5 bands. Other 6 clones were found 7 bands but the occurred frequencies of those bands are variable among those clones. Though the grafting stock are used various individuals grown seed propagation of P. densiflora, moreover, three stocks have been different species and that one has been P. rigida and two individuals have been P. koraiensis, the zymograms of the ramets belonging to the same clone reveals the identified patterns. The results show that the stocks for grafting have not been affected on the isoperoxidase patterns of their scions in P. densiflora. Among 48 ramets of 8 clones, 4 ramets are found the different isoperoxidase patterns from that of the remained rametes within same clone. Thus, it is conluded that zymography is useful for testing genuineness of the grafted clones of P. densiflora.

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Improvement of BigCloneBench Using Tree-Based Convolutional Neural Network (트리 기반 컨볼루션 신경망을 이용한 BigCloneBench 개선)

  • Park, Gunwoo;Hong, Sung-Moon;Kim, Hyunha;Doh, Kyung-Goo
    • Journal of Software Assessment and Valuation
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    • v.15 no.1
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    • pp.43-53
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    • 2019
  • BigCloneBench has recently been used for performance evaluation of code clone detection tool using machine learning. However, since BigCloneBench is not a benchmark that is optimized for machine learning, incorrect learning data can be created. In this paper, we have shown through experiments using machine learning that the set of Type-4 clone methods provided by BigCloneBench can additionally be found. Experimental results using Tree-Based Convolutional Neural Network show that our proposed method is effective in improving BigCloneBench's dataset.

Studies on 2n gametophyte Producing Diploid Potato Clones (2n 배우자 형성 2배체 감자의 육성연구)

  • 김혜영
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.30 no.4
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    • pp.455-459
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    • 1985
  • This study is to select good diploid clones and develope them into FDR clones. Seventeen diploid clones were selected by tuber plants from the imported diploid potato seeds and from the progenies of the crosses between them. The characteristics of the selected clones were reported. Fifteen clones were crossed among them or open pollinated or bulk pollinated, and 18 selections were made from the seed progenies of these pollinations. Male and female unreduced gametes were searched by crossing 2x, 4x and by microtechnique. Only one clone, D6-21 was found to produce unreduced male gamete with the rate of 27-30% by FDR. Unreduced female gamete has not been found among these diploids.

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Differences in Optimal pH and Temperature for Cell Growth and Antibody Production Between Two Chinese Hamster Ovary Clones Derived from the Same Parental Clone

  • Kim, Sung-Hyun;Lee, Gyun-Min
    • Journal of Microbiology and Biotechnology
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    • v.17 no.5
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    • pp.712-720
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    • 2007
  • To investigate clonal variations of recombinant Chinese hamster ovary(rCHO) clones in response to culture pH and temperature, serum-free suspension cultures of two antibody-producing CHO clones(clones A and B), which were isolated from the same parental clone by the limiting dilution method, were performed in a bioreactor at pH values in the range of 6.8-7.6, and two different temperatures, $33^{\circ}C\;and\;37^{\circ}C$. In regard to cell growth, clone A and clone B displayed similar responses to temperature, although their degree of response differed. In contrast, clones A and B displayed different responses to temperature in regard to antibody production. In the case of clone A, no significant increase in maximum antibody concentration was achieved by lowering the culture temperature. The maximum antibody concentration obtained at $33^{\circ}C$(pH 7.4) and $37^{\circ}C$(pH 7.0) were $82.0{\pm}2.6$ and $73.2{\pm}4.1{\mu}g/ml$, respectively. On the other hand, in the case of clone B, an approximately 2.5-fold increase in maximum antibody concentration was achieved by lowering the culture temperature. The enhanced maximum antibody concentration of clone B at $33^{\circ}C$($132.6{\pm}14.9{\mu}g/ml$ at pH 7.2) was due to not only enhanced specific antibody productivity but also to prolonged culture longevity. At $33^{\circ}C$, the culture longevity of clone A also improved, but not as much as that of clone B. Taken together, CHO clones derived from the same parental clone displayed quite different responses to culture temperature and pH with regards antibody production, suggesting that environmental parameters such as temperature and pH should be optimized for each CHO clone.

CloneChecker: A Program Similarity Checker (프로그램 유사성 검사기)

  • 장성순;서선애;이광근
    • Proceedings of the Korean Information Science Society Conference
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    • 2001.10a
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    • pp.334-336
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    • 2001
  • 표절을 쉽게 알아내기 위해, 프로그램 유사성 검사기(CloneChecker)를 만들었다. CloneChecker는 프로그램을 요약해서, 유사성을 계산하고, 비슷한 그룹들로 묶어 낸다. CloneChecker는 두 프로그램의 모든 부 구문트리(abstract syntax sub-tree)들을 서로 비교하므로 구문의 사소한 변화에 민감하지 않으며, 그럼에도 해쉬 함수를 이용하여 빠르게 수행된다. CloneChecker는 실제 강의에서 사용되었으며, C, Java, Scheme, nML로 짜여진 프로그램들에 대해 동작한다.

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Characterization of Mouse Hybridoma Producing Monoclonal Antibody Paragonimus westermani (폐디스토마에 대한 Mmonoclonal Antibody생산 세포주개발에 대한 연구)

  • 고광삼;이숙영;이근배
    • Korean Journal of Microbiology
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    • v.23 no.1
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    • pp.64-68
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    • 1985
  • In this study, hybridoma techniques were applied to produce monoclonal antobodies to Paragonimus westermani, commonly known as lung distoma. Balb/c mice were immunized intraperitoneally every week with increasing doses of purfied protein of Paragonimus westermani adult worms begining with 0.3/mg/mouse/7 days and ending with 0.5mg at 28th day. Spleen cells from these immunized mice were hybridized with myeloma cells (NS-1) and the hybridized cells were selected in HAT media. The antibody secreting cells among the hybrid cells were initially selected by ELISA. Those initially selected cells were further screened by the criteria of antibody producing activity, and seneral cell lines among them were further tested with immunodiffusion method. One hybridoma clone produced IgM and another clone produced IgG1. The supernatant of the hybridoma clone producing IgM had titer 1:64 and the hybridoma clone producing IgG1 had titer 1:256 measured by immunofluorescence technique.

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DNA Sequence and Characteristics of Muscle Development cDNA Clone Derived from Korean Native Chicken (재래닭의 근육 성장과 관련되는 cDNA Clone의 염기서열 및 특성)

  • Sun, S.S.;Myung, K.H.;Kuk, K.;Kim, N.O.
    • Korean Journal of Poultry Science
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    • v.33 no.4
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    • pp.249-254
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    • 2006
  • This experiment was conducted to examine the effective DNA related with muscle growth of Korean native chicken. cDNA library was constructed with mRNA subtraction from Korean native chicken to Cornish. Total mRNA was purified from pectoralis muscle of adult chicken. Five clones were compared their DNA sequence and characteristics based on GenBank. Clone NDS-1 (618nt) was low homology (10%) with other species, but it is closely related with triosephosphate isomerase which is play an important role in glycolysis. Clone NDS-6 (651nt) is corresponding to glyceraldehyde-3-phosphate dehydrogenase. These two clones are encoding to enzymes in key role in glycolysis. However, other three clones (NDS-2, NDS-10, NDS-12) have low homology with other species about 5.0%. These clones were not similar with any other eukaryotics. Therefore, three clones (NDS-2, NDS-10, NDS-12) are high possibility of specific DNA for muscle growth in Korean native chicken.

Nitrogen Removals according to Aeration/Non-aeration Periods in the Intermittent Aeration Reactor and Analysis of Microbial Community (간헐포기공정에서 포기/비포기 구간에 따른 질소제거 및 미생물 군집분석)

  • Choi, Moon-Su;Lee, Tae-Jin
    • Journal of Korean Society of Environmental Engineers
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    • v.36 no.1
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    • pp.42-48
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    • 2014
  • In this study, variations of the organic and nitrogenous compounds in wastewater were investigated in a single reactor with intermittent aeration. Over 90% of organic and nitrogen removals are accomplished with C/N ratio of 3 : 1 and 20/20 min of aeration/non-aeration period. Longer non-aeration period on the aeration/non-aeration cycle showed more stable nitrogen removal, showing various microbial community in the reactor. From PCR-DGGE analysis, it is conclusive that Dysgonomonas mossii strain Melo40, Eubacterium sp. oral clone JN088, Uncultured bacterium clone SPESB2_718, and Bacterium enrichment culture clone LE are related with the organics and nitrogen oxidation. Uncultured Acidobacteria bacterium clone AKYG487, Lactobacillus harbinensis strain FQ003, Erythrobacter litoralis strain Gi-3, Phytobacter diazotrophicus strain Ls8, and Mycobacterium sp. enrichment culture clone GE10037biofNNA are distinctly appeared under denitrification condition.

Domain Analysis of Device Drivers Using Code Clone Detection Method

  • Ma, Yu-Seung;Woo, Duk-Kyun
    • ETRI Journal
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    • v.30 no.3
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    • pp.394-402
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    • 2008
  • Domain analysis is the process of analyzing related software systems in a domain to find their common and variable parts. In the case of device drivers, they are highly suitable for domain analysis because device drivers of the same domain are implemented similarly for each device and each system that they support. Considering this characteristic, this paper introduces a new approach to the domain analysis of device drivers. Our method uses a code clone detection technique to extract similarity among device drivers of the same domain. To examine the applicability of our method, we investigated whole device drivers of a Linux source. Results showed that many reusable similar codes can be discerned by the code clone detection method. We also investigated if our method is applicable to other kernel sources. However, the results show that the code clone detection method is not useful for the domain analysis of all kernel sources. That is, the applicability of the code clone detection method to domain analysis is a peculiar feature of device drivers.

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