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Showing 1 to 12 of 141 entries
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Diffusion and chemical reaction velocity in cylindrical and spherical systems of physiological interest.

Proceedings of the Royal Society of London. Series B, Biological sciences

ROUGHTON FJ.
PMID: 13003927
Proc R Soc Lond B Biol Sci. 1952 Oct 16;140(899):203-29. doi: 10.1098/rspb.1952.0059.

No abstract available.

[Individual fluctuations of the diffusion dosis in roentgenography].

Fortschritte auf dem Gebiete der Rontgenstrahlen

FROHNMEYER G, GLOCKER R.
PMID: 14391468
Fortschr Geb Rontgenstr. 1955 May;82(5):686-7.

No abstract available.

Diffusional increase and decrease in half-maximal-activity substrate concentrations with two-substrate enzymic reactions.

The Biochemical journal

Engasser JM, Hisland P.
PMID: 687375
Biochem J. 1978 Jul 01;173(1):341-3. doi: 10.1042/bj1730341.
Free PMC Article

Diffusional effects on two-substrate enzymic reactions mainly depend on the relative affinities of the enzyme for its two substrates. With two substrates of widely different affinities, diffusional limitations increase and decrease the half-maximal-activity concentration of the high-and low-affinity substrate...

Numerical and experimental investigation of analyte breakthrough from sampling loops used for multi-dimensional liquid chromatography.

Journal of chromatography. A

Moussa A, Lauer T, Stoll D, Desmet G, Broeckhoven K, Dalziel J.
PMID: 32797812
J Chromatogr A. 2020 Aug 30;1626:461283. doi: 10.1016/j.chroma.2020.461283. Epub 2020 Jun 01.

Two-dimensional liquid chromatography is increasingly being used to address challenging separations in fields ranging from pharmaceutical analysis to the food industry. A significant impediment to development of more methods is the lack of a complete theoretical foundation upon which...

Single-Particle Diffusion Characterization by Deep Learning.

Biophysical journal

Granik N, Weiss LE, Nehme E, Levin M, Chein M, Perlson E, Roichman Y, Shechtman Y.
PMID: 31280841
Biophys J. 2019 Jul 23;117(2):185-192. doi: 10.1016/j.bpj.2019.06.015. Epub 2019 Jun 22.

Diffusion plays a crucial role in many biological processes including signaling, cellular organization, transport mechanisms, and more. Direct observation of molecular movement by single-particle-tracking experiments has contributed to a growing body of evidence that many cellular systems do not...

Diffusion-limited reactions in dynamic heterogeneous media.

Nature communications

Lanoiselée Y, Moutal N, Grebenkov DS.
PMID: 30353010
Nat Commun. 2018 Oct 23;9(1):4398. doi: 10.1038/s41467-018-06610-6.

Most biochemical reactions in living cells rely on diffusive search for target molecules or regions in a heterogeneous overcrowded cytoplasmic medium. Rapid rearrangements of the medium constantly change the effective diffusivity felt locally by a diffusing particle and thus...

Patterns of non-normality in networked systems.

Journal of theoretical biology

Muolo R, Asllani M, Fanelli D, Maini PK, Carletti T.
PMID: 31295478
J Theor Biol. 2019 Nov 07;480:81-91. doi: 10.1016/j.jtbi.2019.07.004. Epub 2019 Jul 08.

Several mechanisms have been proposed to explain the spontaneous generation of self-organised patterns, hypothesised to play a role in the formation of many of the magnificent patterns observed in Nature. In several cases of interest, the system under scrutiny...

Effect of diffusion in one-dimensional discontinuous absorbing phase transitions.

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

Fiore CE, Landi GT.
PMID: 25314411
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Sep;90(3):032123. doi: 10.1103/PhysRevE.90.032123. Epub 2014 Sep 18.

It is known that diffusion provokes substantial changes in continuous absorbing phase transitions. Conversely, its effect on discontinuous transitions is much less understood. In order to shed light in this direction, we study the inclusion of diffusion in the...

Extended source model for diffusive coupling.

The European physical journal. E, Soft matter

González-Ochoa HO, Flores-Moreno R, Reyes LM, Femat R.
PMID: 26802012
Eur Phys J E Soft Matter. 2016 Jan;39(1):4. doi: 10.1140/epje/i2016-16004-y. Epub 2016 Jan 26.

Motivated by the prevailing approach to diffusion coupling phenomena which considers point-like diffusing sources, we derived an analogous expression for the concentration rate of change of diffusively coupled extended containers. The proposed equation, together with expressions based on solutions...

Spiral defect drift in the wave fields of multiple excitation patterns.

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

Dutta S, Steinbock O.
PMID: 21728636
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 May;83(5):056213. doi: 10.1103/PhysRevE.83.056213. Epub 2011 May 20.

Spiral waves in excitable systems decay to drifting defects if forced by high-frequency wave trains. Using the Barkley model we analyze the drift velocity in planar wave trains as a function of wave frequency. Within two antiparallel, planar wave...

Kinetic theories of dynamics and persistent caging in a one-dimensional lattice gas.

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

Abel SM, Steve Tse YL, Andersenb HC.
PMID: 19564606
Proc Natl Acad Sci U S A. 2009 Sep 08;106(36):15142-7. doi: 10.1073/pnas.0901693106. Epub 2009 Jun 29.

The one-dimensional, single-occupancy lattice gas exhibits highly cooperative particle motion and provides an interesting challenge for theoretical methods designed to describe caging in liquids. We employ this model in an effort to gain insight into caging phenomena in more...

Escape of DNA from a weakly biased thin nanopore: experimental evidence for a universal diffusive behavior.

Physical review letters

Hoogerheide DP, Albertorio F, Golovchenko JA.
PMID: 24483704
Phys Rev Lett. 2013 Dec 13;111(24):248301. doi: 10.1103/PhysRevLett.111.248301. Epub 2013 Dec 12.

We report experimental escape time distributions of double-stranded DNA molecules initially threaded halfway through a thin solid-state nanopore. We find a universal behavior of the escape time distributions consistent with a one-dimensional first passage formulation notwithstanding the geometry of...

Showing 1 to 12 of 141 entries