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Showing 1 to 12 of 203 entries
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Prognosis of Acute Kidney Injury and Hepatorenal Syndrome in Patients with Cirrhosis: A Prospective Cohort Study.

International journal of nephrology

Allegretti AS, Ortiz G, Wenger J, Deferio JJ, Wibecan J, Kalim S, Tamez H, Chung RT, Karumanchi SA, Thadhani RI.
PMID: 26266048
Int J Nephrol. 2015;2015:108139. doi: 10.1155/2015/108139. Epub 2015 Jul 22.

Background/Aims. Acute kidney injury is a common problem for patients with cirrhosis and is associated with poor survival. We aimed to examine the association between type of acute kidney injury and 90-day mortality. Methods. Prospective cohort study at a...

Synthesis of Pyrene-Fused Pyrazaacenes on Metal Surfaces: Toward One-Dimensional Conjugated Nanostructures.

ACS nano

Jiang L, Papageorgiou AC, Oh SC, Sağlam Ö, Reichert J, Duncan DA, Zhang YQ, Klappenberger F, Guo Y, Allegretti F, More S, Bhosale R, Mateo-Alonso A, Barth JV.
PMID: 26651905
ACS Nano. 2016 Jan 26;10(1):1033-41. doi: 10.1021/acsnano.5b06340. Epub 2015 Dec 14.

We investigated the synthesis of one-dimensional nanostructures via Schiff base (imine) formation on three close-packed coinage metal (Au, Ag, and Cu) surfaces under ultrahigh vacuum conditions. We demonstrate the feasibility of forming pyrene-fused pyrazaacene-based oligomers on the Ag(111) surface...

Allosteric Modulation of Chemoattractant Receptors.

Frontiers in immunology

Allegretti M, Cesta MC, Locati M.
PMID: 27199992
Front Immunol. 2016 May 02;7:170. doi: 10.3389/fimmu.2016.00170. eCollection 2016.

Chemoattractants control selective leukocyte homing via interactions with a dedicated family of related G protein-coupled receptor (GPCR). Emerging evidence indicates that the signaling activity of these receptors, as for other GPCR, is influenced by allosteric modulators, which interact with...

Conformational Change in the Mechanism of Inclusion of Ketoprofen in β-Cyclodextrin: NMR Spectroscopy, Ab Initio Calculations, Molecular Dynamics Simulations, and Photoreactivity.

The journal of physical chemistry. B

Guzzo T, Mandaliti W, Nepravishta R, Aramini A, Bodo E, Daidone I, Allegretti M, Topai A, Paci M.
PMID: 27689813
J Phys Chem B. 2016 Oct 20;120(41):10668-10678. doi: 10.1021/acs.jpcb.6b07913. Epub 2016 Oct 11.

Inclusion of drugs in cyclodextrins (CDs) is a recognized tool for modifying several properties such as solubility, stability, bioavailability, and so on. The photoreactive behavior of the β-CD/ketoprofen (KP) complex upon UV exposure showed a significant increase in photodecarboxylation,...

Adsorption bond length for H2O on TiO2(110): a key parameter for theoretical understanding.

Physical review letters

Allegretti F, O'Brien S, Polcik M, Sayago DI, Woodruff DP.
PMID: 16384241
Phys Rev Lett. 2005 Nov 25;95(22):226104. doi: 10.1103/PhysRevLett.95.226104. Epub 2005 Nov 22.

Scanned-energy mode photoelectron diffraction results show the adsorption site of molecular water on TiO2(110) to be atop under-coordinated surface Ti atoms, confirming the results of total energy calculations and STM imaging. However, the Ti-O(water) bond length is 2.21 +/-...

Investigating the molecule-substrate interaction of prototypic tetrapyrrole compounds: adsorption and self-metalation of porphine on Cu(111).

The Journal of chemical physics

Diller K, Klappenberger F, Allegretti F, Papageorgiou AC, Fischer S, Wiengarten A, Joshi S, Seufert K, Écija D, Auwärter W, Barth JV.
PMID: 23614439
J Chem Phys. 2013 Apr 21;138(15):154710. doi: 10.1063/1.4800771.

We report on the adsorption and self-metalation of a prototypic tetrapyrrole compound, the free-base porphine (2H-P), on the Cu(111) surface. Our multitechnique study combines scanning tunneling microscopy (STM) results with near-edge X-ray absorption fine-structure (NEXAFS) and X-ray photoelectron spectroscopy...

The influence of D-.

Biomedical reports

Dell'Edera D, Sarlo F, Allegretti A, Simone F, Lupo MG, Epifania AA.
PMID: 28804631
Biomed Rep. 2017 Aug;7(2):169-172. doi: 10.3892/br.2017.939. Epub 2017 Jul 04.

The aim of the present study was to demonstrate that the use of inositol and folic acid from the first trimester of pregnancy, counteracts the onset of gestational diabetes mellitus (GDM) in women at risk, preserving the infants from...

Case report: Percutaneous treatment of multiple honeycomb-like liver hydatid cysts (type III CE2, according to WHO classification).

The Indian journal of radiology & imaging

Corona M, Cannavale A, Bruni A, Boatta E, Allegritti M, Lucatelli P, Fanelli F, Pucci A, Paciotti C, Salvatori FM.
PMID: 22623811
Indian J Radiol Imaging. 2012 Jan;22(1):23-6. doi: 10.4103/0971-3026.95399.

Percutaneous treatment has been developing as a reliable and effective alternative to surgery in the treatment of liver hydatid cysts. However, percutaneous treatment is strongly recommended only for some types of hydatid cysts (types I and II). We report...

Unraveling the Oxidation and Spin State of Mn-Corrole through X-ray Spectroscopy and Quantum Chemical Analysis.

The journal of physical chemistry letters

Paszkiewicz M, Biktagirov T, Aldahhak H, Allegretti F, Rauls E, Schöfberger W, Schmidt WG, Barth JV, Gerstmann U, Klappenberger F.
PMID: 30362761
J Phys Chem Lett. 2018 Nov 15;9(22):6412-6420. doi: 10.1021/acs.jpclett.8b02525. Epub 2018 Oct 26.

The interplay between Mn ions and corrole ligands gives rise to complex scenarios regarding the metal centers' electronic properties expressing a range of high oxidation states and spin configurations. The resulting potential of Mn-corroles for applications such as catalysts...

Quantum Tunneling Mediated Interfacial Synthesis of a Benzofuran Derivative.

Angewandte Chemie (International ed. in English)

Paintner T, Björk J, Du P, Klyatskaya S, Paszkiewicz M, Hellwig R, Uphoff M, Öner MA, Cuniberto E, Deimel PS, Zhang YQ, Palma CA, Allegretti F, Ruben M, Barth JV, Klappenberger F.
PMID: 31120567
Angew Chem Int Ed Engl. 2019 Aug 12;58(33):11285-11290. doi: 10.1002/anie.201904030. Epub 2019 Jul 04.

Reaction pathways involving quantum tunneling of protons are fundamental to chemistry and biology. They are responsible for essential aspects of interstellar synthesis, the degradation and isomerization of compounds, enzymatic activity, and protein dynamics. On-surface conditions have been demonstrated to...

Spatial decoupling of macrocyclic metal-organic complexes from a metal support: a 4-fluorothiophenol self-assembled monolayer as a thermally removable spacer.

Physical chemistry chemical physics : PCCP

Deimel PS, Feulner P, Barth JV, Allegretti F.
PMID: 31106802
Phys Chem Chem Phys. 2019 Jun 07;21(21):10992-11003. doi: 10.1039/c9cp01583c. Epub 2019 May 20.

The precise control over the electronic properties and function of metal centres in metal-organic complexes such as metallo-porphyrins (MPs) and metallo-phthalocyanines (MPcs) holds promise for their targeted application in, e.g., nanoscale chemical conversion devices and molecular sensors. However, when...

Validation of the inverted adsorption structure for free-base tetraphenyl porphyrin on Cu(111).

Chemical communications (Cambridge, England)

Ryan PTP, Lalaguna PL, Haag F, Braim MM, Ding P, Payne DJ, Barth JV, Lee TL, Woodruff DP, Allegretti F, Duncan DA.
PMID: 32118210
Chem Commun (Camb). 2020 Mar 28;56(25):3681-3684. doi: 10.1039/c9cc09638h. Epub 2020 Mar 02.

Utilising normal incidence X-ray standing waves we rigourously scrutinise the "inverted model" as the adsorption structure of free-base tetraphenyl porphyrin on Cu(111). We demonstrate that the iminic N atoms are anchored at near-bridge adsorption sites on the surface displaced...

Showing 1 to 12 of 203 entries