Open Access

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2019-01-17
12:34
OpenAccess [FZJ-2019-00481] Journal Article
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Natural biocide cocktails: Combinatorial antibiotic effects of prodigiosin and biosurfactants
PLOS ONE 13(7), e0200940 - () [10.1371/journal.pone.0200940]
Bacterial secondary metabolites are naturally produced to prevail amongst competitors in a shared habitat and thus represent a valuable source for antibiotic discovery. The transformation of newly discovered antibiotic compounds into effective drugs often requires additional surfactant components for drug formulation. [...]
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ddc:610
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2019-01-17
11:26
OpenAccess [FZJ-2019-00471] Book/Report
; ; ; et al
Annual report / Forschungszentrum Jülich Institut für Kernphysik. 1994
[Juel-3035]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3035, 316 p. ()
The past year was a very successful one for both our machine and also our physics program. Sustained efforts in accelerator development at COSY have been rewarded with many highlights [...]
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2019-01-17
11:08
OpenAccess [FZJ-2019-00465] Book/Report

Phasenübergänge in stark korrelierten Elektronensystemen
[Juel-3034]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3034, 135 p. ()
Bilden Atome oder Moleküle einen Festkörper mit einer periodischen Gitterstruktur, so überlappen sich die lokalisierten elektronischen Zustände und breiten sich ähnlich wie ebene Wellen über das gesamte Gitter aus. Dieser von F [...]
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2019-01-17
10:52
OpenAccess [FZJ-2019-00461] Book/Report

Bestimmung effektiver Massen von $^{3}$He-Quasiteilchen in verdünnten $^{3}$He/$^{4}$He-Mischungen mittels Tiefsttemperaturkalorimetrie
[Juel-3033]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3033, II, 72 p. ()
Dilute solutions of $^{3}$He in superfluid $^{4}$He have been investigated by accurate measurements of the specific heat capacity C$_{v}$ for the following parameters: Temperature: 20 mK < T < 200 mK $^{3}$He-concentration: 1.3% < x$_{3}$ < 9.5 % Pressure: 0 bar, 10 bar and 20 bar The data could be fitted to an expression which describes the specific heat capacity of an ideal Fermi gas, yielding the Fermi temperature T$_{f}$, the precise $^{3}$He-concentration in the cell and the effective mass m* of the $^{3}$He-quasiparticles. The main results are: $\bullet$ The dependence of T$_{f}$ (in mK) on the pressure p (in bar) and the $^{3}$He-concentration x$_{3}$ (in %) can be described by the formula: T$_{f}$ = (125.2 - 0.53 $\cdot$ p) $\cdot$ $x^{0.64}_{3}$ $\bullet$ At constant pressure the effective mass m* of the $^{3}$He-quasiparticles increases with $^{3}$He-concentration: $\left( \frac{\partial m*(x_{3},p)}{\partial x_{3}} \right)_{p}$ > 0 The knowledge of m* is valuable for other experiments on $^{3}$He/$^{4}$He-mixtures, because the density of states of the quasiparticles at the Fermi level can be evaluated directly from m*. [...]
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2019-01-17
10:32
OpenAccess [FZJ-2019-00459] Book/Report
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Measurement of the vertical magnetic field in TEXTOR using electron beam technique
[Juel-3032]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3032, 20 p. ()
Determination of the vertical stray field in the plasma centre produced by poloidal field coils is essential for the control of breakdown and of the horizontal plasma position in tokamaks. Measurement by magnetic probes does not provide satisfactory resuits since the toroidal field perpendicular to the poloidal one is 30 .. [...]
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2019-01-17
10:18
OpenAccess [FZJ-2019-00456] Book/Report

Origins of scale invariance in growth processes
[Juel-3031]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3031, 158 p. ()
The study of growth processes has always constituted, explicitly or implicitly; an integral part of solid state physics and materials science. Indeed, most propertiesof real materials depend crucially on the presence of imperfections - bulk vacancies, dislocations, surface roughness - that are remnants of the nonequilibrium conditions under which the material has formed [...]
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2019-01-17
10:15
OpenAccess [FZJ-2019-00454] Journal Article
; ; ; et al
Unstable Slip Pulses and Earthquake Nucleation as a Nonequilibrium First-Order Phase Transition
The onset of rapid slip along initially quiescent frictional interfaces, the process of “earthquake nucleation,” and dissipative spatiotemporal slippage dynamics play important roles in a broad range of physical systems. Here we first show that interfaces described by generic friction laws feature stress-dependent steady-state slip pulse solutions, which are unstable in the quasi-1D approximation of thin elastic bodies. [...]
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ddc:530
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2019-01-17
09:43
OpenAccess [FZJ-2019-00442] Preprint/Book
; ; ; et al
Novel physics opportunities at the HESR-Collider with PANDA at FAIR
Cornell, High Energy Physics - Phenomenology ()
Exciting new scientific opportunities are presented for the PANDA detector at the High Energy Storage Ring in the redefined p_bar p(A) collider mode, HESR-C, at the Facility for Antiproton and Ion Research(FAIR) in Europe. The high luminosity, L = 10^31 cm^-2 s^-1, and a wide range of intermediate and high energies, sqrt(sNN) up to 30 GeV for p_bar p(A) collisions will allow to explore a wide range of exciting topics in QCD, including the study of the production of excited open charm and bottom states, nuclear bound states containing heavy (anti)quarks, the interplay of hard and soft physics in the dilepton production, andthe exploration of the regime where gluons - but not quarks - experience strong interaction..
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2019-01-17
09:07
OpenAccess [FZJ-2019-00439] Book/Report

Funktion und Regulation von Aufnahmesystemen für stickstoffhaltige Substrate bei $\textit{Corynebacterium glutamicum}$
[Juel-3030]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3030, 83 p. ()
1. Für die Harnstoffdiffusion über die Cytoplasmamembran von Corynebacterium glutamicum wurde ein Permeabilitätskoeffizient von 8,5 x 10$^{-7}$ cm x s$^{-1}$ bestimmt. [...]
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2019-01-17
08:52
OpenAccess [FZJ-2019-00436] Book/Report

Markierung von muskarinischen Antagonisten aus der Gruppe der tertiären Fluorphenylcarbinole und -silanole mit den Positronenstrahlern Kohlenstoff-11 und Fluor-18
[Juel-3029]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3029, 146 p. ()
The selective antimuscarinic p-fluoro-hexahydro-sila-difenidoI (1-cyclohexyl-1-(4-fluorophenyl)-4-N-piperidino-butanol [p-FHHD]) was labelled with no-carrier-added(n.c.a.) fluorine-18 for in vivo studies of muscarinic receptors in brain and heart with positron-emission-tomography (PET). Furthermore, the carbon-11 labelledrnethiodides of p-FHHD, cyclohexyl-(4-fluorophenyl)(3-N-piperidinopropyil)silanol (p-fluoro-hexahydro-sila-difenidol, p-FHHSiD), 1,1-diphenyl-3-N-piperidinopropanol(pridiniol) and diphenyl-(2-N-piperidinoethyl)silanol (silapridinol) were prepared [...]
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