• 제목/요약/키워드: Electrophoretic

검색결과 868건 처리시간 0.03초

Residence Time Distribution in the Chromatographic Column: Applications in the Separation Engineering of DNA

  • Park, Young G.
    • Biotechnology and Bioprocess Engineering:BBE
    • /
    • 제8권2호
    • /
    • pp.117-125
    • /
    • 2003
  • Experimental and theoretical works were performed for the separation of large polyelectrolyte, such as DNA, in a column packed with gel particles under the influence of an electric field. Since DNA quickly orient in the field direction through the pores, this paper presents how intraparticle convection affects the residence time distribution of DNAs in the column. The concept is further illustrated with examples from solid -liquid systems, for example, from chromatography Showing how the column efficiency is improved by the use of a n electric field. Dimensionless transient mass balance equations were derived, taking into consideration both diffusion and electrophoretic convection. The separation criteria are theoretically studied using two different Peclet numbers in the fluid and solid phases. These criteria were experimentally verified using two different DNAs via electrophoretic mobility measurements. which showed how the separation position of the DNAs varies in the column in relation to the Peg/Pef values of an individual DNA. The residence time distribution was solved by an operator theory and the characteristic method to yield the column response.

메밀 단백질의 전기영동유형 및 아미노산 조성에 관한 연구 (Studies on Electrophoretic Pattern and Amino Acids of Buckwheat Protein)

  • 이미숙;손경희
    • 한국식품조리과학회지
    • /
    • 제8권4호
    • /
    • pp.379-385
    • /
    • 1992
  • 1. Amino acid compositions were determined by amino acid analyzer. Through the analysis of these samples, it was found that glutamic acid was the most abundant; glycine, aspartic acid, lysine and threonine were rich; and tryptophan and methionine were the limiting amino acid. 2. Albumins, globulins, gliadins and glutelins were extracted from the Kangwon hull, Kangwon rice buckwheat, and wheat. The relative proportions of protein fractions were 52.45 : 10.14 : 16.61 : 20.80% in Kangwon hull buckwheat, 21.10 : 13.80 : 28.40 : 36.70% in Kangwon rice buckwheat and 6.87 : 1.65 : 42.85 : 48.6% in wheat, in the order of albumins, globulins, gliadins and glutelins. 3. Polyacrylamide gel electrophoresis (PAGE) and SDS-polyacrylamide gel electrophoresis (SDS-PAGE) were performed to identify the subfractions of each protein fraction. The electrophoregrams of PAGE showed that the same fractions of both Kangwon hull buckwheat protein and Kangwon rice buckwheat protein had very similar electrophoretic patterns to each other respectively, but there were significant differences in the patterns between buckwheat proteins and wheat proteins.

  • PDF

Flexible Active-Matrix Electrophoretic Display With Integrated Scan-And Data-Drivers

  • Miyazaki, Atsushi;Kawai, Hideyuki;Miyasaka, Mitsutoshi;Inoue, Satoshi;Shimoda, Tatsuya
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
    • /
    • pp.153-156
    • /
    • 2004
  • A newly developed flexible active-matrix (AM-) electrophoretic display (EPD) is reported. The AM-EPD features: (1) low-temperature polycrystalline silicon (LTPS) thin film transistor (TFT) technology, (2) fully integrated scan- and data-drivers, (3) flexibility and light-weight realized by transferring the whole circuits onto a plastic substrate using $SUFTLA^{TM}$ (Surface Free Technology by Laser Annealing/Ablation) process. A large storage capacitor is formed in each pixel so that driving electric field can be kept sufficiently strong during a writing period Two-phase driving scheme, a reset-phase which erases a previous image and a writing-phase for writing a new image, was chosen to cope with EPD's high driving voltage. The flexible AM-EPD has been successfully operated with a driving voltage of 8.5 V.

  • PDF

Disc Electrophoresis에 의한 면화의 Genome과 종간관계 분석 (Analysis of Genome and Species Relationships in Cotton by Disc Electrophoresis)

  • 최종열;장병호
    • 한국작물학회지
    • /
    • 제13권
    • /
    • pp.73-76
    • /
    • 1973
  • Protein spectra from 6 species of Gossypium were obtained by disc electraphoresis of seed extracts. Protein extracts were made by soaking 0.5g. of seed in 15ml of Tris-glycine buffer for 24 hours. Gels 24 hours. Gels were stained in 0.5% Amido Black solution for 1 hour, and destained in 7% acetic acid for 72 hours. Nine to 15 bands were visible in each gel. Homologies of Protein bands among the species were determined by migration velocity. Evidences obtained from electrophoretic separation of seed Protein were consistent with those from genetic, cytological, morphological and Phenogenetic methods regarding the origin of New World cultivated cottons. Possibility, however, does not exist to exclude Gossypium herbaceum from one of the Progenitors of New World cultivated cottons from electrophoretic evidences alone.

  • PDF

Iso-catalase Profiles of Deinococcus spp.

  • Soung, Nak-Kuyn;Lee, Young-Nam
    • BMB Reports
    • /
    • 제33권5호
    • /
    • pp.412-416
    • /
    • 2000
  • The obligate aerobic Deinococcus are highly resistant against lethal effect of UV-and ionizing-radiation. Only five mesophilic Deinococcus species, i. e. D. radiodurans, D. radiophilus, D. proteolyticus, D. radiopugnans, and D. grandis are known. Since an indispensable role of catalase has been suggested in protecting cells against oxidative stress and UV radiation, Deinococcal catalase activity of each species and electrophoretic profiles of catalases were investigated on gel. Total catalase activity was varied among the species in the aerobically grown culture at stationary phase. The occurrence of multiple forms of catalases with different molecular weights in four species of Deinococcus and of a single catalase in D. radiopugnans suggests that each species shows the unique catalase profiles on gel. Some Deinococcal catalases also exhibit peroxidase activity. Since Deinococcus spp. are less-distinct to each other in their morphology, biochemical and physiological properties, the catalase profiles on PAGE would be useful in identifying the species of Deinococcus.

  • PDF