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Showing 25 to 36 of 955 entries
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Front propagation in laminar flows.

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

Abel M, Celani A, Vergni D, Vulpiani A.
PMID: 11690146
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Oct;64(4):046307. doi: 10.1103/PhysRevE.64.046307. Epub 2001 Sep 25.

The problem of front propagation in flowing media is addressed for laminar velocity fields in two dimensions. Three representative cases are discussed: stationary cellular flow, stationary shear flow, and percolating flow. Production terms of Fisher-Kolmogorov-Petrovskii-Piskunov type and of Arrhenius...

Joys and pitfalls of fermi surface mapping in Bi(2)Sr(2)CaCu(2)O(8+delta) using angle resolved photoemission.

Physical review letters

Borisenko SV, Golden MS, Legner S, Pichler T, Durr C, Knupfer M, Fink J, Yang G, Abell S, Berger H.
PMID: 10990709
Phys Rev Lett. 2000 May 08;84(19):4453-6. doi: 10.1103/PhysRevLett.84.4453.

On the basis of angle-scanned photoemission data recorded using unpolarized radiation, with high (E,k) resolution, and an extremely dense sampling of k space, we resolve the current controversy regarding the normal state Fermi surface (FS) in Bi(2)Sr(2)CaCu(2)O(8+delta). The true...

Direct observation of chiral metal-organic complexes assembled on a Cu100 surface.

Journal of the American Chemical Society

Messina P, Dmitriev A, Lin N, Spillmann H, Abel M, Barth JV, Kern K.
PMID: 12440891
J Am Chem Soc. 2002 Nov 27;124(47):14000-1. doi: 10.1021/ja028553s.

We report single-molecule level STM observations of chiral complexes generated by the assembly of achiral components at a metal surface. Following co-deposition of iron atoms and 1,3,5-tricarboxylic benzoic acid (trimesic acid, TMA) on Cu(100) in ultrahigh vaccum, TMA molecules...

Topographical expression of class IA and class II phosphoinositide 3-kinase enzymes in normal human tissues is consistent with a role in differentiation.

BMC clinical pathology

El Sheikh SS, Domin J, Tomtitchong P, Abel P, Stamp G, Lalani EN.
PMID: 14563213
BMC Clin Pathol. 2003 Oct 16;3(1):4. doi: 10.1186/1472-6890-3-4.

BACKGROUND: Growth factor, cytokine and chemokine-induced activation of PI3K enzymes constitutes the start of a complex signalling cascade, which ultimately mediates cellular activities such as proliferation, differentiation, chemotaxis, survival, trafficking, and glucose homeostasis. The PI3K enzyme family is divided...

The point of no return in planar hand movements: an indication of the existence of high level motion primitives.

Cognitive neurodynamics

Sosnik R, Shemesh M, Abeles M.
PMID: 19003504
Cogn Neurodyn. 2007 Dec;1(4):341-58. doi: 10.1007/s11571-007-9025-x. Epub 2007 Sep 01.

Previous psychophysical studies have sought to determine whether the processes of movement engagement and termination are dissociable, whether stopping an action is a generic process, and whether there is a point in time in which the generation of a...

Role of Ethylene in Lactuca sativa cv ;Grand Rapids' Seed Germination.

Plant physiology

Abeles FB.
PMID: 16664902
Plant Physiol. 1986 Jul;81(3):780-7. doi: 10.1104/pp.81.3.780.

Promotion of thermoinhibited (30 degrees C) lettuce (Lactuca sativa cv ;Grand Rapids') seed germination by ethylene is similar to the action of the gas in other hormonal systems. Ethylene was more active than propylene and ethane was inactive. An...

Organized formation of 2D extended covalent organic frameworks at surfaces.

Journal of the American Chemical Society

Zwaneveld NA, Pawlak R, Abel M, Catalin D, Gigmes D, Bertin D, Porte L.
PMID: 18444643
J Am Chem Soc. 2008 May 28;130(21):6678-9. doi: 10.1021/ja800906f. Epub 2008 Apr 30.

The development of nanoscale masking for particle deposition is exceedingly important to push the future of nanoelectronics beyond the current limits of lithography. We present the first example of ordered hexagonal covalent nanoporous structures deposited in extended arrays of...

Modification of fruit ripening by suppressing gene expression.

Plant physiology

Theologis A, Zarembinski TI, Oeller PW, Liang X, Abel S.
PMID: 16653026
Plant Physiol. 1992 Oct;100(2):549-51. doi: 10.1104/pp.100.2.549.

No abstract available.

Determinants of health policy impact: a theoretical framework for policy analysis.

Sozial- und Praventivmedizin

Rütten A, Lüschen G, von Lengerke T, Abel T, Kannas L, Rodríguez Diaz JA, Vinck J, van der Zee J.
PMID: 14626621
Soz Praventivmed. 2003;48(5):293-300. doi: 10.1007/s00038-003-2118-3.

This paper addresses the role of policy and evidence in health promotion. The concept of von Wright's "logic of events" is introduced and applied to health policy impact analysis. According to von Wright (1976), human action can be explained...

Abscission: the role of ethylene, ethylene analogues, carbon dioxide, and oxygen.

Plant physiology

Abeles FB, Gahagan HE.
PMID: 16656908
Plant Physiol. 1968 Aug;43(8):1255-8. doi: 10.1104/pp.43.8.1255.

Ethylene was the most effective abscission accelerant examined, with decreasing activity shown by propene, carbon monoxide, acetylene, vinyl fluoride, 1-butene, and 1,3-butadiene. Carbon dioxide inhibited abscission, but its effect was overcome by ethylene. Oxygen was required for abscission as...

Auxin stimulation of ethylene evolution.

Plant physiology

Abeles FB.
PMID: 16656291
Plant Physiol. 1966 Apr;41(4):585-8. doi: 10.1104/pp.41.4.585.

The stimulation of ethylene production from seedling tissue of Phascolus vulgaris, Helianthus annuus and Zea mays by growth regulators was inhibited by actinomycin D and puromycin and to a lesser extent by 2-thiouracil and p-fluorophenylalanine. It is concluded that...

Role of RNA and protein synthesis in abscission.

Plant physiology

Abeles FB.
PMID: 16657020
Plant Physiol. 1968 Sep;43(9):1577-86.

The cell separation aspect of abscission is thought to involve the action of specific cell wall degrading enzymes. Enzymes represent synthesis which in turn is preceded by the synthesis of specific RNA molecules, and it follows that inhibition of...

Showing 25 to 36 of 955 entries