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  • Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)  (16)
Materialart
Verlag/Herausgeber
  • Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)  (16)
Person/Organisation
Sprache
Erscheinungszeitraum
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  • 1
    Online-Ressource
    Online-Ressource
    PRESENT DAY DEFORMATION IN THE EAST VIETNAM SEA AND SURROUNDING REGIONS
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2015
    In:  Vietnam Journal of Marine Science and Technology Vol. 15, No. 2 ( 2015-06-30), p. 105-118
    Details
    In: Vietnam Journal of Marine Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 15, No. 2 ( 2015-06-30), p. 105-118
    Kurzfassung: This paper presents velocities of present-day tectonic movement and strain rate in the East Vietnam Sea (South China Sea) and surroundings determined from GPS campaigns between 2007 and 2010. We determine absolute velocities of GPS stations in the ITRF05 frame. The result indicates that GPS stations in the North of East Vietnam Sea move eastwards with the slip rate of 30 - 39 mm/yr, southwards at the velocities of 8 - 11 mm/yr. Song Tu Tay offshore moves eastwards at the rate of ~24 mm/yr and southwards at ~9 mm/yr. GPS stations in the South of East Vietnam Sea move to the east at the rate of ~22 mm/yr and to the south at the velocities of 7 - 11 mm/yr. The effect of relative movement shows that the Western Margin Fault Zone activates as left lateral fault zone at the slip rate less than 4 mm/year.In Western plateau, the first result from 2012 - 2013 GPS measurement shows that the velocities to the east vary from 21.5 mm/yr to 24.7 mm/year. The velocities to the south vary from 10.5 mm/yr to 14.6 mm/year. GPS solutions determined from our campaigns are combined with data from various authors and international projects to determine the strain rate in the East Vietnam Sea. Principal strain rate changes from 15 nanostrain/yr to 9 nanostrain/yr in the East Vietnam Sea. Principal strain rate and maximum shear strain rate along the Red River Fault Zone are in order of 10 nanostrain/year. East Vietnam Sea is considered to belong to the Sunda block.
    Materialart: Online-Ressource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/15/2/6499
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2015
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 2
    Online-Ressource
    Online-Ressource
    Assessment of sedimentation in Tri An reservoir by nuclear technique, geological analyses and GIS
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2014
    In:  VIETNAM JOURNAL OF EARTH SCIENCES Vol. 36, No. 1 ( 2014-06-19)
    Details
    In: VIETNAM JOURNAL OF EARTH SCIENCES, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 36, No. 1 ( 2014-06-19)
    Materialart: Online-Ressource
    ISSN: 0866-7187 , 0866-7187
    URL: Article
    DOI: 10.15625/0866-7187/36/1/4141
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2014
    SSG: 6,25
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 3
    Online-Ressource
    Online-Ressource
    Environments of upper miocene sediments in the Hanoi depression interpreted from grain-size parameters
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  VIETNAM JOURNAL OF EARTH SCIENCES Vol. 41, No. 2 ( 2019-03-15), p. 182-199
    Details
    In: VIETNAM JOURNAL OF EARTH SCIENCES, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 41, No. 2 ( 2019-03-15), p. 182-199
    Kurzfassung: The grain-size analysis is carried out for 49 samples of Upper Miocene sediments taken from three boreholes in the Hanoi depression. The statistic parameters of the grain size distributions such as percentiles, median, graphic mean, sorting or inclusive graphic standard deviation, inclusive graphic skewness, and graphic kurtosis are used to decipher the depositional environments and transportation mechanisms of sediments. Bivariate plotting of these parameters, the discriminant functions with four basic parameters of graphics mean, sorting, inclusive graphic skewness and graphic kurtosis, and the CM pattern with the one percentile (C) and median (M) diameters are applied for this determination. The plots of graphics mean versus sorting suggest 14% of samples being the sand sheet, 46% related to rivers and 40% of the estuarine environment. The sorting - inclusive graphic skewness plot shows a river-related environment for all samples. Linear discriminant functions show the sandstone of upper Miocene in Hanoi depression are deltaic sediments formed in unstably transporting and depositional environment, impacted by turbidity current in the coastal river-mouth. The CM pattern shows sediment transportation for most of the samples in three modes: rolling, suspension and rolling, and uniform suspension. The environmental dynamics are relatively complex and change over time.
    Materialart: Online-Ressource
    ISSN: 0866-7187 , 0866-7187
    URL: Article
    DOI: 10.15625/0866-7187/41/2/13798
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2019
    SSG: 6,25
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 4
    Online-Ressource
    Online-Ressource
    Optimization for continuous overflow proteolytic hydrolysis of spent brewer’s yeast by using proteases
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2018
    In:  Vietnam Journal of Biotechnology Vol. 14, No. 4 ( 2018-04-19), p. 735-742
    Details
    In: Vietnam Journal of Biotechnology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 14, No. 4 ( 2018-04-19), p. 735-742
    Kurzfassung: A large amount of spent yeast as by-product is annually generated from brewing industry and it contains about 50-55% protein with good balance of amino acids. The hydrolysate produced from spent brewer’s yeast may be used in food application. The yield of proteolylic hydrolysis for spent brewer’s yeast and amino acid contents of hydrolysates depend on factors such as temperature, pH value, type of used enzyme and ratio enzyme/substrate, time. Besides, applied hydrolysing methods (batch-, or continuous method) has effected on degree of hydrolysis. With the purpose of how proteolytic hydrolysis having effects on the spent brewer’s yeast for food application in industrial scale, continuous overflow method was used in this study. Bitterness of hydrolysate and the yield of continuous overflow proteolytic hydrolysis process are the two interested factors for protein hydrolysis. In this report, it is dealt with determination for optimal conditions to obtain the highest yield of hydrolysis process and the lowest bitterness of hydrolysate. Response surface methodology (RSM) was used to determine optimal condition for continuous overflow proteolytic hydrolysis of spent brewer’s yeast. The optimal conditions for obtaining high degree of hydrolysis and low bitterness are determined as followings: ratio of enzyme mixture (alcalase 7.5 U/g and flavourzyme 10 U/g), pH at 7.5, hydrolysis temperature at 51oC and hydrolysis time of 9 hours. Under the optimal conditions, the yield of hydrolysis was 59.62% ± 0.027 and the bitterness equivalently with concentration of quinine was 7.86 ± 0.033 μmol /ml.
    Materialart: Online-Ressource
    ISSN: 1811-4989 , 1811-4989
    URL: Article
    DOI: 10.15625/1811-4989/14/4/12308
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2018
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 5
    Online-Ressource
    Online-Ressource
    The mangrove with sediment's evolution and Paleoclimate in the Holocene at the Red river mouth
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2018
    In:  VIETNAM JOURNAL OF EARTH SCIENCES Vol. 25, No. 2 ( 2018-03-19), p. 97-102
    Details
    In: VIETNAM JOURNAL OF EARTH SCIENCES, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 25, No. 2 ( 2018-03-19), p. 97-102
    Kurzfassung: There are four successive...
    Materialart: Online-Ressource
    ISSN: 0866-7187 , 0866-7187
    URL: Article
    DOI: 10.15625/0866-7187/25/2/11857
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2018
    SSG: 6,25
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 6
    Online-Ressource
    Online-Ressource
    The relationship between direct determination and FD-graph.
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2012
    In:  Journal of Computer Science and Cybernetics Vol. 18, No. 1 ( 2012-08-01)
    Details
    In: Journal of Computer Science and Cybernetics, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 18, No. 1 ( 2012-08-01)
    Materialart: Online-Ressource
    ISSN: 1813-9663 , 1813-9663
    URL: Article
    DOI: 10.15625/1813-9663/18/1/2406
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2012
    SSG: 24,1
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 7
    Online-Ressource
    Online-Ressource
    Two Spot Coupled Ring Resonators
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Communications in Physics Vol. 29, No. 4 ( 2019-12-16), p. 491-
    Details
    In: Communications in Physics, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 29, No. 4 ( 2019-12-16), p. 491-
    Kurzfassung: Abstract. We consider a model of two coupled ring waveguides with constant linear gain and nonlinear absorption with space-dependent coupling. This system can be implemented in various physical situations as optical waveguides, atomic Bose-Einstein condensates, polarization condensates, etc. It is described by two coupled nonlinear Schrödinger equation. For numerical simulations, we take local two-gaussian coupling.It is found in our previous papers that, depending on the values of involved parameters, we can obtain several interesting nonlinear phenomena, which include spontaneous symmetry breaking, modulational instability leading to generation of stable circular flows with various vorticities, stable inhomogeneous states with interesting structure of currents flowing between rings, as well as dynamical regimes having signatures of chaotic behavior. This research will be associated with experimental investigation planned in Freie Universität Berlin, in the group of prof. Michael Giersig.
    Materialart: Online-Ressource
    ISSN: 0868-3166 , 0868-3166
    URL: Issue
    URL: Article
    DOI: 10.15625/0868-3166-29-4
    DOI: 10.15625/0868-3166/29/4/13810
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2019
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 8
    Online-Ressource
    Online-Ressource
    CLONING, EXPRESSION AND LYTIC EFFICACY ASSESSMENT OF THE STAPHYLOCOCCUS AUREUS PHAGE LYSIN GENE
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2018
    In:  Vietnam Journal of Biotechnology Vol. 16, No. 2 ( 2018-12-17), p. 345-351
    Details
    In: Vietnam Journal of Biotechnology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 16, No. 2 ( 2018-12-17), p. 345-351
    Kurzfassung: The discovery of antibiotics is considered to be one of the greatest medical achievements in the early part of 20th. Over the past six decades, these ‘wonder drugs’ have played a critical role in reducing the global burden of communicable diseases. As a country in the tropical zone, Vietnam faces numerous infectious disease outbreaks every year. In addition, the overuse of antibiotics in healthcare and the misuse of antibiotics as growth promoter in agriculture these past decades have led to serious antibiotic-resistance in bacterial pathogens of human, crops and livestock in Vietnam. This poses an urgent need for alternative strategies to fight against these pathogens. Lysins are phage-encoded peptidoglycan hydrolases which were recently demonstrated the strong potential in human and veterinary medicine to control and treat pathogens on mucosal surfaces and in systemic infections. These enzymes when applied exogenously to Gram-positive bacteria, bring about rapid lysis and death of the bacterial cell and therefore promise an effective alternative therapy against antibiotic-resistant bacterial pathogens. In this study, we applied the DNA technology to produce a recombinant S. aureus lysin (LysK). LysK was PCR amplified from phage S. aureus and cloned into a pET32a(+) expression vector. The recombinant fusion protein (LysK-Trx) was successfully expressed in E. coli, purified through nickel column chromatography, and further digested with Thrombin protease. The cleaved protein (intact LysK) was purified by nickel column again. The recombinant LysK was tested for its ability to kill S. aureus by a spot inoculation assay. The results showed that recombinant LysK induced the lysis of host bacteria, indicating that the protein was expressed and functionally active. Data from the current study can be used to develop therapeutic tools for treating diseases caused by drug-resistant S. aureus strains in Vietnam.
    Materialart: Online-Ressource
    ISSN: 1811-4989 , 1811-4989
    URL: Article
    DOI: 10.15625/1811-4989/16/2/13447
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2018
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 9
    Online-Ressource
    Online-Ressource
    Spontaneous Symmetry Breaking of Solitons Trapped in a Double-Gauss Potentials
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2018
    In:  Communications in Physics Vol. 28, No. 4 ( 2018-12-27), p. 301-
    Details
    In: Communications in Physics, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 28, No. 4 ( 2018-12-27), p. 301-
    Kurzfassung: We consider an extended model of the model considered before with double-square potential, namely one-dimensional (1D) nonlinear Schrödinger equation (NLSE) with self-focusing nonlinearity and a 1D double-gauss potential. Spontaneous symmetry breaking has been presented in terms of the control parameter which is propagation constant in the case of optics and chemical potential in the of Bose-Einstein Condensate (BEC), correspondingly. The numerical simulations predict a bifurcation breaking the symmetry of 1D trapped in the double-gauss potential of the supercritical type as in the case of double-square potential. Furthermore we have constructed bifurcation diagrams considering the stability of solitons with three methods: the method using Vakhitov–Kolokolov (V-K) Stability Criterion, Pseudospectral Method and Method for Linear-Stability Eigenvalues. It will be shown that for our model the results obtained are the same for these three methods but the third one is the fastest.
    Materialart: Online-Ressource
    ISSN: 0868-3166 , 0868-3166
    URL: Issue
    URL: Article
    DOI: 10.15625/0868-3166-28-4
    DOI: 10.15625/0868-3166/28/4/13195
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2018
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 10
    Online-Ressource
    Online-Ressource
    Controlling Optical Bistability in a Five-level Cascade EIT Medium
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2016
    In:  Communications in Physics Vol. 26, No. 1 ( 2016-07-18), p. 33-
    Details
    In: Communications in Physics, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 26, No. 1 ( 2016-07-18), p. 33-
    Kurzfassung: Optical bistability (OB) of an electromagnetically induced transparency (EIT) medium placed in a conventional unidirectional ring cavity is investigated numerically. The medium is excited by a coupling and probe laser lights via a five-level cascade scheme. It is shown that optical bistabe states with controllable switching threshold intensities and width are established simultaneously in three spectral regions corresponding to EIT windows. The current numerical result is compared to a previous analytical result showing influence of coherence terms neglected in the analytical model.
    Materialart: Online-Ressource
    ISSN: 2815-5947 , 0868-3166
    URL: Issue
    URL: Article
    DOI: 10.15625/0868-3166-26-1
    DOI: 10.15625/0868-3166/26/1/8213
    Sprache: Unbekannt
    Verlag: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publikationsdatum: 2016
    Standort Signatur Einschränkungen Verfügbarkeit
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