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Showing 13 to 24 of 223 entries
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[Perspectives for surgery in the 21st century].

Deutsche medizinische Wochenschrift (1946)

Encke A.
PMID: 10800439
Dtsch Med Wochenschr. 2000 Apr 14;125(15):443.

No abstract available.

Energy and enstrophy transfer in decaying two-dimensional turbulence.

Physical review letters

Rivera MK, Daniel WB, Chen SY, Ecke RE.
PMID: 12689000
Phys Rev Lett. 2003 Mar 14;90(10):104502. doi: 10.1103/PhysRevLett.90.104502. Epub 2003 Mar 13.

We present experimental data on the direct enstrophy cascade in decaying two-dimensional turbulence. Velocity and vorticity fields are obtained using particle tracking velocimetry. From those fields we directly compute the enstrophy and energy flux by using a filtering technique...

Electrochemical processes in electrospray ionization mass spectrometry.

Journal of mass spectrometry : JMS

Mora JF, Van Berkel GJ, Enke CG, Cole RB, Martinez-Sanchez M, Fenn JB.
PMID: 10972994
J Mass Spectrom. 2000 Aug;35(8):939-52. doi: 10.1002/1096-9888(200008)35:8<939::AID-JMS36>3.0.CO;2-V.

Editorial Comment Last month we presented, as a Special Feature, a set of five articles that constituted a Commentary on the fundamentals and mechanism of electrospray ionization (ESI). These articles produced some lively discussion among the authors on the...

Entropic tightening of vibrated chains.

Physical review. E, Statistical, nonlinear, and soft matter physics

Hastings MB, Daya ZA, Ben-Naim E, Ecke RE.
PMID: 12241223
Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Aug;66(2):025102. doi: 10.1103/PhysRevE.66.025102. Epub 2002 Aug 06.

We investigate experimentally the distribution of configurations of a ring with an elementary topological constraint, a "figure-8" twist. Using a system far from thermal equilibrium, a vibrated granular chain, we show that configurations where one loop is small and...

The elusive terminal imido of manganese(v).

Angewandte Chemie (International ed. in English)

Eikey RA, Khan SI, Abu-Omar MM.
PMID: 12370901
Angew Chem Int Ed Engl. 2002 Oct 04;41(19):3592-5, 3514. doi: 10.1002/1521-3773(20021004)41:19<3591::AID-ANIE3591>3.0.CO;2-Z.

No abstract available.

Light scattering on oceanic turbulence.

Applied optics

Bogucki DJ, Domaradzki JA, Ecke RE, Truman CR.
PMID: 15534998
Appl Opt. 2004 Oct 20;43(30):5662-8. doi: 10.1364/ao.43.005662.

Turbulent inhomogeneities of fluid flow have the effect of scattering light in near-forward angles, thus providing an opportunity to use optics to quantify turbulence. Here we report measurements of the volume-scattering function in the range of 10(-7) to 10(-3)...

Physical mechanism of the two-dimensional inverse energy cascade.

Physical review letters

Chen S, Ecke RE, Eyink GL, Rivera M, Wan M, Xiao Z.
PMID: 16606186
Phys Rev Lett. 2006 Mar 03;96(8):084502. doi: 10.1103/PhysRevLett.96.084502. Epub 2006 Feb 28.

We study the physical mechanisms of the two-dimensional inverse energy cascade using theory, numerics, and experiment. Kraichnan's prediction of a -5/3 spectrum with constant, negative energy flux is verified in our simulations of 2D Navier-Stokes equations. We observe a...

Granular chains.

Chaos (Woodbury, N.Y.)

Ben-Naim E, Daya ZA, Ecke RE.
PMID: 16396585
Chaos. 2005 Dec;15(4):041109. doi: 10.1063/1.2126809.

No abstract available.

Axial focusing following low kinetic energy pulsed extraction from a miniature linear ion trap.

Rapid communications in mass spectrometry : RCM

Dobson GS, Enke CG.
PMID: 17663499
Rapid Commun Mass Spectrom. 2007;21(17):2905-12. doi: 10.1002/rcm.3158.

Using an axial focusing miniature linear ion trap with tubular end cap lenses (MLIT) we have investigated spatial focusing on ion ejection using low kinetic energy pulsed extraction methods. Ion packet widths focused to ca. 1 mm (in both...

Triple quadrupole mass spectrometry for direct mixture analysis and structure elucidation.

Analytical chemistry

Yost RA, Enke CG.
PMID: 21902234
Anal Chem. 1979 Oct;51(12):1251-64. doi: 10.1021/ac50048a002.

No abstract available.

Convective instability and mass transport of diffusion layers in a Hele-Shaw geometry.

Physical review letters

Backhaus S, Turitsyn K, Ecke RE.
PMID: 21469794
Phys Rev Lett. 2011 Mar 11;106(10):104501. doi: 10.1103/PhysRevLett.106.104501. Epub 2011 Mar 07.

We consider experimentally the instability and mass transport of flow in a Hele-Shaw geometry. In an initially stable configuration, a lighter fluid (water) is located over a heavier fluid (propylene glycol). The fluids mix via diffusion with some regions...

Extension of the focusable mass range in distance-of-flight mass spectrometry with multiple detectors.

Rapid communications in mass spectrometry : RCM

Gundlach-Graham AW, Dennis EA, Ray SJ, Enke CG, Carado AJ, Barinaga CJ, Koppenaal DW, Hieftje GM.
PMID: 23008070
Rapid Commun Mass Spectrom. 2012 Nov 15;26(21):2526-34. doi: 10.1002/rcm.6379.

RATIONALE: Distance-of-flight mass spectrometry (DOFMS) is a velocity-based mass separation technique in which ions are spread across a spatially selective detector according to m/z. In this work, we investigate the practical mass range available for DOFMS with a finite-length...

Showing 13 to 24 of 223 entries