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Showing 25 to 36 of 359 entries
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Dynamical heterogeneity in a model for permanent gels: different behavior of dynamical susceptibilities.

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

Abete T, de Candia A, Del Gado E, Fierro A, Coniglio A.
PMID: 18999424
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Oct;78(4):041404. doi: 10.1103/PhysRevE.78.041404. Epub 2008 Oct 14.

We present a systematic study of dynamical heterogeneity in a model for permanent gels upon approaching the gelation threshold. We find that the fluctuations of the self-intermediate scattering function are increasing functions of time, reaching a plateau whose value,...

Re-entrant phase diagram and pH effects in cross-linked gelatin gels.

The Journal of chemical physics

Abete T, Del Gado E, de Arcangelis L, Serughetti DH, Djabourov M.
PMID: 19045122
J Chem Phys. 2008 Oct 07;129(13):134902. doi: 10.1063/1.2985655.

Experimental results have shown that the kinetics of bond formation in chemical cross-linking of gelatin solutions are strongly affected not only by gelatin and reactant concentrations but also by the solution pH. We present an extended numerical investigation of...

Surface conductivity of colloidal particles: experimental assessment of its contributions.

Journal of colloid and interface science

Jiménez ML, Arroyo FJ, Carrique F, Delgado AV.
PMID: 17884068
J Colloid Interface Sci. 2007 Dec 15;316(2):836-43. doi: 10.1016/j.jcis.2007.07.016. Epub 2007 Sep 19.

In this work we investigate how combined data on dielectric dispersion and electrophoretic mobility of colloidal suspensions at different temperatures can be used to evaluate the two main quantities characterizing the solid/liquid interface, namely, the zeta potential and the...

Dynamic characterization of extremely bidisperse magnetorheological fluids.

Journal of colloid and interface science

Iglesias GR, López-López MT, Durán JD, González-Caballero F, Delgado AV.
PMID: 22520211
J Colloid Interface Sci. 2012 Jul 01;377(1):153-9. doi: 10.1016/j.jcis.2012.03.077. Epub 2012 Apr 04.

In this work, we investigate the stability and redispersibility of magnetorheological fluids (MRFs). These are disperse systems where the solid is constituted by ferro- or ferri-magnetic microparticles. Upon the application of external magnetic field, they experience rapid and reversible...

Evaluation of the Leishmanicidal Activity of Rutaceae and Lauraceae Ethanol Extracts on Golden Syrian Hamster (Mesocricetus auratus) Peritoneal Macrophages.

Indian journal of pharmaceutical sciences

Chávez Enciso NA, Coy-Barrera ED, Patiño OJ, Cuca LE, Delgado G.
PMID: 25035529
Indian J Pharm Sci. 2014 May;76(3):188-97.

Traditional medicine has provided a number of therapeutic solutions for the control of infectious agents, cancers, and other diseases. After screening a wide variety of Colombian plant extracts, we have identified promising antileishmanial activity in ethanol extracts from Ocotea...

Effectiveness of infliximab in the treatment of perianal fistulas in ulcerative colitis: report of two cases.

Annals of gastroenterology

de la Piscina PR, Duca I, Estrada S, Spicakova K, Calderón R, Urtasun L, Marra-López C, Salvador M, Delgado E, Campos FG.
PMID: 24714219
Ann Gastroenterol. 2013;26(3):261-263.

Ulcerative colitis is a chronic inflammatory bowel disease of unknown etiopathogenesis and increasing incidence in recent years. Perianal complications of ulcerative colitis are rare and seem to be associated with higher extent of inflammation and a more severe course...

Nanostructures on surfaces of the metalorganic compound {Fe2(CO)6[µ-S2C6H2(OH)2]} and its potential as catalyst precursor for the synthesis of carbon nanotubes.

Dalton transactions (Cambridge, England : 2003)

González-Prieto R, Nievas Á, Fernández-Vindel MA, Castillo Ó, Hernández E, Delgado E, Zamora F.
PMID: 21293822
Dalton Trans. 2011 Apr 07;40(13):3109-11. doi: 10.1039/c0dt01761b. Epub 2011 Feb 04.

The compound {Fe(2)(CO)(6)[µ-S(2)C(6)H(2)(OH)(2)]} is organized by H-bond interactions on graphite and SiO(2) surfaces as micron-length nanofibres. Thermal degradation of these fibres adsorbed on SiO(2) leads to a very homogeneous surface filled with Fe(2)O(3) nanoparticles (ca. 2.5 nm diameter) suitable...

4-Carboxypiperidinium 1-carboxycyclobutane-1-carboxylate.

Acta crystallographica. Section C, Crystal structure communications

Belandria LM, Mora AJ, Delgado GE, Briceño A.
PMID: 22307260
Acta Crystallogr C. 2012 Feb;68:o88-91. doi: 10.1107/S0108270111054977. Epub 2012 Jan 18.

The title salt, C(6)H(12)NO(2)(+)·C(6)H(7)O(4)(-) or ISO(+)·CBDC(-), is an ionic ensemble assisted by hydrogen bonds. The amino acid moiety (ISO or piperidine-4-carboxylic acid) has a protonated ring N atom (ISO(+) or 4-carboxypiperidinium), while the semi-protonated acid (CBDC(-) or 1-carboxycyclobutane-1-carboxylate) has...

Description and performance of a fully automatic device for the study of the sedimentation of magnetic suspensions.

The Review of scientific instruments

Iglesias GR, López-López MT, Delgado AV, Durán JD.
PMID: 21806198
Rev Sci Instrum. 2011 Jul;82(7):073906. doi: 10.1063/1.3609228.

In this paper we describe an experimental setup for the automatic determination of the sedimentation behavior of magnetic suspensions (i.e., disperse systems consisting on ferro- or ferri-magnetic particles in a suitable fluid) of arbitrary volume fraction of solids. The...

Nano-scale mechanics of colloidal C-S-H gels.

Soft matter

Masoero E, Del Gado E, Pellenq RJ, Yip S, Ulm FJ.
PMID: 24651715
Soft Matter. 2014 Jan 21;10(3):491-9. doi: 10.1039/c3sm51815a.

Gels of calcium-silicate-hydrates (C-S-H) are the glue that is largely responsible for the mechanical properties of cement. Despite their practical relevance, their nano-scale structure and mechanics are still mainly unexplored, because of the difficulties in characterizing them in a...

Rate Dependence of Elementary Rearrangements and Spatiotemporal Correlations in the 3D Flow of Soft Solids.

Physical review letters

Vasisht VV, Dutta SK, Del Gado E, Blair DL, Rock ML.
PMID: 29350955
Phys Rev Lett. 2018 Jan 05;120(1):018001. doi: 10.1103/PhysRevLett.120.018001.

We use a combination of confocal microscopy, rheology, and molecular dynamics simulations to investigate jammed emulsions under shear, by analyzing the 3D droplets rearrangements in the shear frame. Our quantitative analysis of local dynamics reveals elementary nonaffine rearrangements that...

Human Summating Potential Using Continuous Loop Averaging Deconvolution: Response Amplitudes Vary with Tone Burst Repetition Rate and Duration.

Frontiers in neuroscience

Kennedy AE, Kaf WA, Ferraro JA, Delgado RE, Lichtenhan JT.
PMID: 28798660
Front Neurosci. 2017 Jul 27;11:429. doi: 10.3389/fnins.2017.00429. eCollection 2017.

Electrocochleography (ECochG) to high repetition rate tone bursts may have advantages over ECochG to clicks with standard slow rates. Tone burst stimuli presented at a high repetition rate may enhance summating potential (SP) measurements by reducing neural contributions resulting...

Showing 25 to 36 of 359 entries