• Title, Summary, Keyword: NTS

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Nodulation and Early Growth of Supernodulating Mutants in Soybean (초다 근류착생 돌연변이체 콩의 뿌리혹 형성 및 초기생육)

  • 이석하;이홍석
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.37 no.1
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    • pp.16-21
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    • 1992
  • Increase in nodulation and nitrogen fixation was achieved partly through the isolation of supernodulating soybean mutant plants. This experiment was conducted to compare nodulation, nitrogen fixation, and early growth characters of wild type 'Bragg' with those of its supernodulating soybean mutant, 'nts 382' and 'nts 246'. At 31 days after planting, nodule dry weight of nts mutants was 2.5 to 3.7 times greater than that of Bragg. Higher nodulation of nts mutants showed the reduced top growth, indicating that photosynthates might be translocated and used for nodule growth attached to the root system. Total acetylene reduction activity was higher in nts mutants than Bragg, whereas specific acetylene reduction activity of nts mutant was the half of that of Bragg. Mixture of nts mutants and Bragg did not affect nodulation characters each other, suggesting that factors affecting supernodulating characters exist inside rather than outside the root system.

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Requirements Recommended for Nuclear Training Simulator Development based on IEEE 1516 (IEEE 1516 기반의 NTS 개발을 위한 권장요건)

  • 박근옥;임종태;한관호
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.133-138
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    • 2003
  • The latest version of the HLA(High Level Architecture) standard developed by the US Department of Defense was established as an open and internal IEEE 1516 HLA standard in 2000. Commercial applications based on the IEEE 1516 have already developed in the non-defense industry. We participated in several development projects for NTS (Nuclear Training Simulator). Extensive modifications are necessary to make a new and/or upgraded NTS because the previously developed simulation softwares have not two desirable property: reusability and interoperability. We reviewed the IEEE 1516 specifications to develop NTS having the capability of reusability and interoperability. Our review activities were forced on application development process, supporting tools, and software structure of NTS. The primary goal of this review is to identify what are constraints or problems to be resolved when we apply IEEE 1516 to NTS development. In this paper we suggest several recommendations for NTS developers.

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Distributing NTS Costs of the Fixed Network in Response to Growth of IP Telephone in Japan (IP 전화 확대에 대응한 유선망 NTS 비용 배부 분석 : 일본을 중심으로)

  • Lee, J.Y.
    • Electronics and Telecommunications Trends
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    • v.24 no.2
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    • pp.120-130
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    • 2009
  • 일본은 유선 통화량 감소에 대응한 유선 접속료의 급격한 인상을 막기 위해 NTS 성격에 해당 비용을 5년에 걸쳐 단계적으로 접속원가에서 제외하여 기본료로 회수하도록 한 2004년의 결정을 수정하여 RT-GC 구간 전송로에 해당되는 NTS 비용을 다시 5년에 걸쳐 단계적으로 접속원가에 포함하기로 하였다. 이것은 기본료 부문에서의 경쟁이 도입된 상황을 고려했을 때 개정된 보편적 서비스 제도에서 고비용 지역 원가의 상당부분을 차지하고 있는 RT-GC 구간 전송로 비용이 회수되지 못하게 된 점을 고려한 것이다 이에 따라 NTS 비용으로 분류된 RT-GC 전송로 비용은 보편적 서비스 제도에서 문제된 관련 비용이 회수될 수 있도록 개선되기 전까지 접속료를 통해 회수되게 되었다. 중요한 것은 해당 비용이 실태에 맞게 최소한의 것에 한정되도록 하기 위해 접속원가에 포함되는 RT-GC 전송로 비용은 실제의 네트워크에 있어서 RT 설치국인 국사의 전송로 비용에 한정되도록 하고 있다는 것이다. 이와 같은 일본의 접근은 NTS 비용을 접속원가에서 제외한다는 원칙은 그대로 유지된 상황에서 보편적 서비스 제도 개선과정에서 발생되는 한시적 조치로서 고려되는 것이며, 이용자 부담을 완화한다는 원칙에 기초하고 있다.

Photocatalytic decomposition of polyethylene composite film with TiO2 nanotube powders prepared by rapid breakdown anodization (급속 파괴 양극산화로 제조된 TiO2 나노 튜브 분말을 활용한 폴리에틸렌 복합 필름의 UV 광촉매 분해)

  • Lim, Kyungmin;Kim, Yong-Tae;Choi, Jinsub
    • Journal of the Korean institute of surface engineering
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    • v.53 no.4
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    • pp.153-159
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    • 2020
  • Photocatalytic decomposition of polyethylene film with TiO2 nanotube powders (NTs) was investigated under UV irradiation at ambient conditions. TiO2 NTs composed of individual nanotubes are prepared by rapid breakdown anodization technique. A comparative study on the photocatalytic decomposition of polyethylene-TiO2 composite films prepared using TiO2 nanoparticles (NPs) or TiO2 NTs (NTs), respectively, was conducted under UV irradiation. Polyethylene film incorporated with TiO2 NTs showed 26 wt% weight loss after 200 h under UV irradiation about two times faster decomposition rate than TiO2 NPs which is attributed to large surface area of TiO2 NTs.

Developmental Ability of Enucleated Bovine Oocytes Matured In Vitro Following Fusion with a Single Blastomere of Embryos Matured and Fertilized In Vitro (소 체외수정란의 단일분할구와 제핵미수정란 융합배의 초기발생에 관한 연구)

  • 김정익;정희태;박춘근;양부근
    • Korean Journal of Animal Reproduction
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    • v.18 no.2
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    • pp.121-126
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    • 1994
  • This study was conducted to examine the condition of activation of the nuclear transplant bovine embryos. In vitro fertilized(IVF) and nuclear transplant embryos(NTs) were co-cultured with bovine oviduct epithelial tissue(BOET). NTs were treated with cycloheximide(CHXM) for 0 to 6 h after electrofusion to investigate the activation conditin of recipient ooplast. Then, the infljence of the CHXM treatment timing on the cleavage and development of NTs were investigated in relation to the nuclear transplant time. The cleavage rates of NTs were increased with the increasing time of the CHXM treatment from 0 to 6 h (54.7 to 91.3%, P<0.01). Similar trend was shown in the development into the morula or blastocyst stage, but very limitted. Activation of enucleated oocytes prior to fusion enhanced development of NTs compared with that post fustion. This result suggests that the frequency of activation of NTs can be greatly enhanced by treating with CHXM for 6 h. The result also suggests that if blastomeres of unknown cell cycle stage are used, activation of enucleated oocytes prior to fusion enhances development of NTs.

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Differences in Clinical and Laboratory Findings between Group D and Non-Group D Non-Typhoidal Salmonella Gastroenteritis in Children

  • Park, Heung Keun;Rhie, Kyuyol;Yeom, Jung Sook;Park, Ji Sook;Park, Eun Sil;Seo, Ji-Hyun;Lim, Jae Young;Park, Chan-Hoo;Woo, Hyang-Ok;Youn, Hee-Shang;Kang, Ki Ryeon;Park, Jung Je
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.18 no.2
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    • pp.85-93
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    • 2015
  • Purpose: To investigate the differences in clinical features and laboratory findings between group D and non-group D non-typhoidal Salmonella (NTS) gastroenteritis in children. Methods: A retrospective chart review of children diagnosed with NTS confirmed by culture study was performed. The clinical features and laboratory findings of group D and non-group D NTS were compared. Results: From 2003 to 2012, 75 cases were diagnosed as NTS at our center. The number of group D and non-group D patients was 45 and 30, respectively. The mean age was higher in group D than in non-group D patients (5.1 years vs. 3.4 years, p=0.038). Headaches were more frequently observed (p=0.046) and hematochezia was less frequently observed (p=0.017) in group D than in non-group D NTS gastroenteritis patients. A positive Widal test result was observed in 53.3% of group D and 6.7% of non-group D NTS cases (O-titer, p=0.030; H-titer, p=0.039). There were no differences in white blood cell counts, level of C-reactive protein and rate of antimicrobial resistance between group D and non-group D cases. Conclusion: The more severe clinical features such as headache, fever, and higher Widal titers were found to be indicative of group D NTS gastroenteritis. Additionally, group D NTS gastroenteritis was more commonly found in older patients. Therefore, old age, fever, headache, and a positive Widal test are more indicative of group D NTS than non-group D NTS gastroenteritis. Pathophysiological mechanisms may differ across serologic groups.

Phylogenetic Relationships among Allium subg. Rhizirideum Species Based on the Molecular Variation of 5S rRNA Genes

  • Do, Geum-Sook;Seo, Bong-Bo
    • Animal cells and systems
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    • v.4 no.1
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    • pp.77-85
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    • 2000
  • This study has demonstrated the molecular variation of 5S rRNA genes in 15 Allium subgenus Rhizirideum and 1 Allium subg. Allium. For cloning of the 5S rRNA genes, PCR products were obtained from amplification with oligonucleotide primers which were derived from the conserved coding region of 5S rRNA genes. These amplified PCR products were cloned and identified by FISH and sequence analysis. The 5S rRNA loci were primarily located on chromosomes 5 and/or 7 in diploid species and various chromosomes in alloploid species. The size of the coding region of 5S rRNA genes was 120 bp in all the species and the sequences were highly conserved within Allium species. The sizes of nontranscribed spacer (NTS) region were varied from 194 bp (A. dektiude-fustykisum, 2n=16) to 483 bp (A. sativum). Two kinds of NTS regions were observed in A. victorialis var. platyphyllum a diploid, A. wakegi an amphihaploid, A. sacculiferum, A. grayi, A. deltoide-fistulosum and A. wenescens all allotetraploids, while most diploid species showed only one NTS region. The species containing two components of NTS region were grouped with different diploid species in a phylogenetic tree analysis using the sequences of 5S rRNA genes and adjacent non-coding regions.

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Preparation of Ni Nanoparticles-TiO2 Nanotube Arrays Composite and Its Application for Electrochemical Capacitor

  • He, Huichao;Zhang, Yunhuai;Xiao, Peng;Yang, Yannan;Lou, Qing;Yang, Fei
    • Bulletin of the Korean Chemical Society
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    • v.33 no.5
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    • pp.1613-1616
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    • 2012
  • Ni nanoparticles-$TiO_2$ nanotube arrays (Ni/$TiO_2NTs$) composites were prepared by pulsed electrodeposition method and subsequently characterized by means of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). The FESEM results showed that highly dispersed Ni nanoparticles were not only loaded on the top of the $TiO_2NTs$ but also within the tubular structure, and the particle size of Ni prepared at different current amplitude (100, 200 and 300 $mA{\cdot}cm^{-2}$) was in the range of 15 to 70 nm. The electrochemical studies indicated that Ni nanoparticles loaded on the highly ordered $TiO_2NTs$ are readily accessible for electrochemical reactions, which improve the efficiency of the Ni nanoparticles and $TiO_2NTs$. A maximum specific capacitance (27.3 $mF.cm^{-2}$) was obtained on the Ni/$TiO_2NTs$ composite electrode that prepared at a current of 200 $mA.cm^{-2}$, and the electrode also exhibited excellent electrochemical stability.

Solar Energy Conversion by the Regular Array of TiO2 Nanotubes Anchored with ZnS/CdSSe/CdS Quantum Dots Formed by Sequential Ionic Bath Deposition

  • Park, Soojeong;Seo, Yeonju;Kim, Myung Soo;Lee, Seonghoon
    • Bulletin of the Korean Chemical Society
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    • v.34 no.3
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    • pp.856-862
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    • 2013
  • The photoanode electrode of $TiO_2$ nanotubes (NTs) anchored with ZnS/CdSSe/CdS quantum dots (QDs) was prepared by anodization of Ti metal and successive ionic layer adsorption and reaction (SILAR) procedure. The tuning of the band gap of CdSSe was done with controlled composition of Cd, S, or Se during the SILAR. A ladder-like energy structure suitable for carrier transfer was attained with the photoanode electrode. The power conversion efficiency (PCE) of our solar cell fabricated with the regular array of $TiO_2$ NTs anchored with CdSSe/CdS or CdSe/CdS QDs [i.e., (CdSSe/CdS/$TiO_2NTs$) or (CdSe/CdS/$TiO_2NTs$)] was PCE = 3.49% and 2.81% under the illumination at 100 mW/$cm^2$, respectively. To protect the photocorrosion of our solar cell from the electrolyte and to suppress carrier recombination, ZnS was introduced onto CdSSe/CdS. The PCE of our solar cell with the structure of a photoanode electrode, (ZnS/CdSSe/CdS/$TiO_2$ NTs/Ti) was 4.67% under illumination at 100 mW/$cm^2$.

The Present State of New Transit System and Future Prospects (신교통시스템의 특성 및 기술개발전망)

  • 정병두;권영인
    • Proceedings of the KSR Conference
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    • pp.144-151
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    • 1998
  • This paper review current situation of New Transit System (NTS) which mainly developed by the western countries. The paper classified NTS by it capacity, physical appearance, and so on. It reviewed the brief history of LRT, which became new guided transport system in terms of transport environment especially for transport handicapped. It also includes the merit of Linear Metro, which could be popular for the urban transport system. Finally, the paper prospects the future of NTS for the planning of urban transport system.

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