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Showing 1 to 12 of 234 entries
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Delayed signatures of underground nuclear explosions.

Scientific reports

Carrigan CR, Sun Y, Hunter SL, Ruddle DG, Wagoner JL, Myers KB, Emer DF, Drellack SL, Chipman VD.
PMID: 26979288
Sci Rep. 2016 Mar 16;6:23032. doi: 10.1038/srep23032.

Radionuclide signals from underground nuclear explosions (UNEs) are strongly influenced by the surrounding hydrogeologic regime. One effect of containment is delay of detonation-produced radioxenon reaching the surface as well as lengthening of its period of detectability compared to uncontained...

Hole-burning diffusion measurements in high magnetic field gradients.

Journal of magnetic resonance (San Diego, Calif. : 1997)

Sigmund EE, Halperin WP.
PMID: 12852912
J Magn Reson. 2003 Jul;163(1):99-104. doi: 10.1016/s1090-7807(03)00133-2.

We describe methods for the measurement of translational diffusion in very large static magnetic field gradients by NMR. The techniques use a "hole-burning" sequence that, with the use of fringe field gradients of 42 T/m, can image diffusion along...

NMR phase noise in bitter magnets.

Journal of magnetic resonance (San Diego, Calif. : 1997)

Sigmund EE, Calder ES, Thomas GW, Mitrović VF, Bachman HN, Halperin WP, Kuhns PL, Reyes AP.
PMID: 11237636
J Magn Reson. 2001 Feb;148(2):309-13. doi: 10.1006/jmre.2000.2246.

We have studied the temporal instability of a high field resistive Bitter magnet through nuclear magnetic resonance (NMR). This instability leads to transverse spin decoherence in repeated and accumulated NMR experiments as is normally performed during signal averaging. We...

[Physical activity and clustering of CVD risk factors--secondary publication].

Ugeskrift for laeger

Andersen LB, Anderssen SA, Brage S, Ekelund U, Froberg K.
PMID: 17134609
Ugeskr Laeger. 2006 Nov 20;168(47):4101-3.

This study aimed to derive guidelines on physical activity. We did a cross-sectional study of 1732 9-year-old and 15-year-old children. Objectively measured physical activity was associated to clustered CVD risk with an OR for the least active of 3.29...

Three's company when seeking unanimity.

Proceedings of the National Academy of Sciences of the United States of America

Sigmund K.
PMID: 15611478
Proc Natl Acad Sci U S A. 2004 Dec 28;101(52):17885-6. doi: 10.1073/pnas.0407824101. Epub 2004 Dec 20.

No abstract available.

Coaxially electrospun PVDF-Teflon AF and Teflon AF-PVDF core-sheath nanofiber mats with superhydrophobic properties.

Langmuir : the ACS journal of surfaces and colloids

Muthiah P, Hsu SH, Sigmund W.
PMID: 20614895
Langmuir. 2010 Aug 03;26(15):12483-7. doi: 10.1021/la100748g.

This work reports the coaxial electrospinning of poly(vinylidene fluoride) (PVDF)-Teflon amorphous fluoropolymer (AF) and Teflon AF-PVDF core-sheath nanofiber mats yielding superhydrophobic properties. The coaxial electrospinning configuration allows for the electrospinning of Teflon AF, a nonelectrospinnable polymer, with the help...

Adsorption of sodium polyacrylate in high solids loading calcium carbonate slurries.

Journal of colloid and interface science

Taylor JJ, Sigmund WM.
PMID: 19875128
J Colloid Interface Sci. 2010 Jan 15;341(2):298-302. doi: 10.1016/j.jcis.2009.09.048. Epub 2009 Oct 04.

The adsorption of sodium polyacrylate (NaPAA) in slurries with up to 75 wt.% calcium carbonate was investigated with the use of attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and adsorption of probe molecules. Analysis of the IR spectra demonstrated...

Influence of heavy fuel oil composition and boiler combustion conditions on particulate emissions.

Environmental science & technology

Goldstein HL, Siegmund CW.
PMID: 22175672
Environ Sci Technol. 1976 Nov 01;10(12):1109-14. doi: 10.1021/es60122a006.

No abstract available.

PPARγ: no SirT, no service.

Circulation research

Quelle FW, Sigmund CD.
PMID: 23371897
Circ Res. 2013 Feb 01;112(3):411-4. doi: 10.1161/CIRCRESAHA.113.300870.

No abstract available.

Fundamental limitations to gain enhancement in periodic media and waveguides.

Physical review letters

Grgić J, Ott JR, Wang F, Sigmund O, Jauho AP, Mørk J, Mortensen NA.
PMID: 22681078
Phys Rev Lett. 2012 May 04;108(18):183903. doi: 10.1103/PhysRevLett.108.183903. Epub 2012 May 04.

A common strategy to compensate for losses in optical nanostructures is to add gain material in the system. By exploiting slow-light effects it is expected that the gain may be enhanced beyond its bulk value. Here we show that...

Role of the surface chemistry of ceria surfaces on silicate adsorption.

ACS applied materials & interfaces

Seo J, Lee JW, Moon J, Sigmund W, Paik U.
PMID: 24734880
ACS Appl Mater Interfaces. 2014 May 28;6(10):7388-94. doi: 10.1021/am500816y. Epub 2014 Apr 25.

Ceria nanoparticles (NPs) have been widely explored as a promising material in various fields. As synthesized under various physicochemical conditions, it exhibits the different surface chemistry. Here, the role of hydroxyl and nitrate group on ceria surface, formed under...

Plasmonic surface enhancement of dual fluorescence and phosphorescence emission from organic semiconductors: effect of exchange gap and spin-orbit coupling.

Chemical communications (Cambridge, England)

Chaudhuri D, Li D, Sigmund E, Wettach H, Höger S, Lupton JM.
PMID: 22641010
Chem Commun (Camb). 2012 Jul 07;48(53):6675-7. doi: 10.1039/c2cc31843a. Epub 2012 May 29.

Dual singlet-triplet fluorescence-phosphorescence emitting compounds demonstrate that plasmonic surface enhancement is controlled solely by the underlying oscillator strength of a transition: metal-free compounds with weak spin-orbit coupling show no enhancement in phosphorescence efficiency even though fluorescence is amplified.

Showing 1 to 12 of 234 entries