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Cherman, Aleksey; Cohen, Thomas D.; Hohler, Paul M., E-mail: pmhohler@physics.umd.edu2008
AbstractAbstract
[en] There have been a number of forms of a conjecture that there is a universal lower bound on the ratio, η/s, of the shear viscosity, η, to entropy density, s, with several different domains of validity. We examine the various forms of the conjecture. We argue that a number of variants of the conjecture are not viable due to the existence of theoretically consistent counterexamples. We also note that much of the evidence in favor of a bound does not apply to the variants which have not yet been ruled out
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Available from http://dx.doi.org/10.1088/1126-6708/2008/02/026; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Journal of High Energy Physics; ISSN 1126-6708;
; v. 02(2008); p. 026

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AbstractAbstract
[en] Although the viscosity behavior of bacteria and extracellular polymeric substances (EPS) in flocculent activated sludge (FAS) and aerobic granular sludge (AGS) has been investigated, no studies have explored the role of viscosity in microbial attachment in pure culture. This study investigated the viscosity behavior of bacteria and EPS. The results showed that bacteria and their EPS exhibited non-Newtonian fluid and shear-thinning behavior. The viscosity of bacteria and EPS was 1.55–3.80 cP and 1.10–2.40 cP, respectively, while the attachment of bacteria (optical density at 600 nm) was 0.1426–3.1015. Bacteria with high attachment secreted EPS with a higher viscosity (2.40 cP), whereas those with weak attachment expressed EPS with a lower viscosity (1.10 cP). Viscosity and microbial attachment or extracellular polysaccharide (PS) content were significantly positively correlated. PS content was the source of bacterial viscosity, and β-polysaccharide played a more important role in viscosity and microbial attachment than α-polysaccharide. Thus, viscosity plays a critical role in microbial attachment, and high viscosity and PS content result in high microbial attachment, which is beneficial to the granulation process of AGS.
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1. International Research Conference on Sustainable Energy, Engineering, Materials and Environment (IRCSEEME); Newcastle Upon Tyne (United Kingdom); 26-28 Jul 2017; Copyright (c) 2019 Springer-Verlag GmbH Germany, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
Journal
Environmental Science and Pollution Research International; ISSN 0944-1344;
; v. 26(29); p. 30087-30097

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Hoyos, Carlos; Kim, Bom Soo; Oz, Yaron
Funding organisation: SCOAP3, CERN, Geneva (Switzerland)
arXiv e-print [ PDF ]2014
Funding organisation: SCOAP3, CERN, Geneva (Switzerland)
arXiv e-print [ PDF ]2014
AbstractAbstract
[en] We compute the bulk viscosity in holographic models dual to theories with Lifshitz scaling and/or hyperscaling violation, using a generalization of the bulk viscosity formula derived in arXiv:1103.1657 from the null focusing equation. We find that only a class of models with massive vector fields are truly Lifshitz scale invariant, and have a vanishing bulk viscosity. For other holographic models with scalars and/or massless vector fields we find a universal formula in terms of the dynamical exponent and the hyperscaling violation exponent
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Available from http://dx.doi.org/10.1007/JHEP03(2014)050; Available from http://repo.scoap3.org/record/1604; PUBLISHER-ID: JHEP03(2014)050; OAI: oai:repo.scoap3.org:1604; Copyright (c) OPEN ACCESS, © The Authors; This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Journal of High Energy Physics (Online); ISSN 1029-8479;
; v. 2014(03); p. 50

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AbstractAbstract
[en] It is commonly accepted that contour length fluctuations increase the viscosity exponent for chains that diffuse by reptation. We found that length fluctuations in the necklace model can play an unexpected role as they can also decrease this exponent. A detailed analysis of the interplay between the discrete character of the model and how the fluctuations take place is presented in this work. Basically, we found that when fluctuations are symmetric their influence is the expected one; when fluctuations are not symmetric new effects can appear
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S1751-8113(09)05966-6; Available from http://dx.doi.org/10.1088/1751-8113/42/16/165005; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Journal of Physics. A, Mathematical and Theoretical (Online); ISSN 1751-8121;
; v. 42(16); [11 p.]

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AbstractAbstract
No abstract available
Original Title
Hydrodynamique d'un superfluide anisotrope. Le tenseur des viscosites
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Journal Article
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Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences. Serie B; v. 278(23); p. 1009-1012
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AbstractAbstract
[en] As an experimental project proposed to students in fourth year of university, a viscometer was developed, consisting of a small magnet levitating in a viscous fluid. The viscous force acting on the magnet is directly measured: viscosities in the range 10-106 mPa s are obtained. This experiment is used as an introduction to complex fluids and soft matter physics
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S0143-0807(09)84185-8; Available from http://dx.doi.org/10.1088/0143-0807/30/1/002; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
No abstract available
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(c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
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Leont'eva, A.A.
Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.). Stabsabteilung Internationale Beziehungen1981
Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.). Stabsabteilung Internationale Beziehungen1981
AbstractAbstract
[en] In the case of associated salt melts such as NaPO3, Na2B4O7-B2O4, Na2O-SiO2 and K2B4O7-B2O3 the theory of Anrade agrees well with experimental findings. One exception is Na2B4O7 in the case of which the melting point separates two regions of the viscose fluid. For all salt melts the equation of S. Khaikin however is only valid in individual regions. (HP)
[de]
Fuer assoziierte Salzschmelzen wie NaPO3, Na2B4O7-B2O3, Na2O-SiO2 und K2B4O7-B2O3 stimmt die Andrade-Theorie mit dem Experiment ueberein. Eine Ausnahme bildet Na2B4O7, wofuer der Schmelzpunkt zwei Bereiche der viskosen Fluessigkeit abgrenzt. Dafuer wird die Formel von S. Khaikin fuer alle Salzschmelzen nur auf einzelnen Abschnitten erfuellt. (HP)Original Title
Anwendung der Viskositaetsformeln von E. Andrade und S. Khaikin fuer Salzschmelzen
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Jan 1981; 16 p; Also published in Zh. Fiz. Khim. (1938) v. 11(3) p. 310-316; Translated from Russian: Primenenie formul vyazkosti E. Andrade i S. Khaikina dlya rasplavlennykh solei.
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Report
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AbstractAbstract
No abstract available
Original Title
La premiere viscosite de la phase de Balian-Werthamer de l'helium 3 superfluide
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Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences. Serie B; v. 277(5); p. 115-118
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Weimin, Yang; Haoyi, Li, E-mail: yangwm@mail.buct.edu.cn2014
AbstractAbstract
[en] Two methods preparing polymer ultrafine fiber have been developed: solution electrospinning and melt electrospinning, among which, solution electrospinning is much simpler to realize in lab or industry. More than 100 institutions have made endeavors to research it and more than 30 thousand papers have been published. However, its industrialization was restricted in some extend because of existence of toxic solvent and low strength caused by small pores. Solventless melt electrospinning is environment friendly, but high melt viscosity, thick fiber diameter, low yield and complex equipment lead to less research on it. Aiming to solving the shortage of traditional needle nozzle equipment, we first proposed a melt differential electrospinning method preparing ultrafine fiber, through which fiber smaller than imicrometer can be produced and a yield of 10-20g/h can be achieved by a needleless nozzle. Further more, principle and equipment of melt differential electrospinning are introduced
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NANOSTRUC 2014: 2. international conference on structural nano composites; Madrid (Spain); 20-21 May 2014; Available from http://dx.doi.org/10.1088/1757-899X/64/1/012013; Country of input: International Atomic Energy Agency (IAEA)
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IOP Conference Series. Materials Science and Engineering (Online); ISSN 1757-899X;
; v. 64(1); [5 p.]

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