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Showing 25 to 36 of 652 entries
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Electronic and structural properties of the (1010) and (1120) ZnO surfaces.

The journal of physical chemistry. A

Marana NL, Longo VM, Longo E, Martins JB, Sambrano JR.
PMID: 18593138
J Phys Chem A. 2008 Sep 25;112(38):8958-63. doi: 10.1021/jp801718x. Epub 2008 Jul 02.

The structural and electronic properties of ZnO (1010) and (1120) surfaces were investigated by means of density functional theory applied to periodic calculations at B3LYP level. The stability and relaxation effects for both surfaces were analyzed. The electronic and...

Spectroscopic evidence of thermally induced metamorphosis in ethenylene-bridged periodic mesoporous organosilicas.

Physical chemistry chemical physics : PCCP

Vercaemst C, Jones JT, Khimyak YZ, Martins JC, Verpoort F, Van Der Voort P.
PMID: 18766230
Phys Chem Chem Phys. 2008 Sep 21;10(35):5349-52. doi: 10.1039/b808630n. Epub 2008 Jul 18.

Spectroscopic evidence of the thermally induced generation of multifunctional mesoporous materials through metamorphism within the pore walls of ethenylene-bridged PMOs is presented.

Size-dependent optical properties of colloidal PbS quantum dots.

ACS nano

Moreels I, Lambert K, Smeets D, De Muynck D, Nollet T, Martins JC, Vanhaecke F, Vantomme A, Delerue C, Allan G, Hens Z.
PMID: 19780530
ACS Nano. 2009 Oct 27;3(10):3023-30. doi: 10.1021/nn900863a.

We quantitatively investigate the size-dependent optical properties of colloidal PbS nanocrystals or quantum dots (Qdots), by combining the Qdot absorbance spectra with detailed elemental analysis of the Qdot suspensions. At high energies, the molar extinction coefficient epsilon increases with...

Transcription of ncDNA: Many roads lead to local gene regulation.

Transcription

Hainer SJ, Martens JA.
PMID: 21826282
Transcription. 2011 May;2(3):120-123. doi: 10.4161/trns.2.3.15684.

Transcription of ncDNA occurs throughout eukaryotic genomes, generating a wide array of ncRNAs. One large class of ncRNAs includes those transcribed over the promoter regions of nearby protein coding genes. Recent studies, primarily focusing on individual genes have uncovered...

Template-aluminosilicate structures at the early stages of zeolite ZSM-5 formation. A combined preparative, solid-state NMR, and computational study.

The journal of physical chemistry. B

Magusin PC, Zorin VE, Aerts A, Houssin CJ, Yakovlev AL, Kirschhock CE, Martens JA, van Santen RA.
PMID: 16853966
J Phys Chem B. 2005 Dec 08;109(48):22767-74. doi: 10.1021/jp053217u.

Species at three stages in the self-assembly of zeolite ZSM-5 have been studied with one- and two-dimensional magic-angle-spinning 13C, 27Al, 29Si, and 1H NMR spectroscopy and compared with the earlier proposed structures: (1) precursor species containing 33-36 T sites...

Developing asymmetric iron and ruthenium-based cyclone complexes; complex factors influence the asymmetric induction in the transfer hydrogenation of ketones.

Organic & biomolecular chemistry

Hopewell JP, Martins JE, Johnson TC, Godfrey J, Wills M.
PMID: 22028086
Org Biomol Chem. 2012 Jan 07;10(1):134-45. doi: 10.1039/c1ob06010d. Epub 2011 Oct 26.

The preparation of a range of asymmetric iron and ruthenium-cyclone complexes, and their application to the asymmetric reduction of a ketone, are described. The enantioselectivity of ketone reduction is influenced by a single chiral centre in the catalyst, as...

Anterior sagittal approach without splitting the rectal wall.

International journal of surgery case reports

Leite MT, Fachin CG, de Albuquerque Maranhão RF, Shida ME, Martins JL.
PMID: 23811390
Int J Surg Case Rep. 2013;4(8):723-6. doi: 10.1016/j.ijscr.2013.05.013. Epub 2013 Jun 06.

INTRODUCTION: The anterior sagittal transrectal approach (ASTRA) has already become popular to treat lesions in the proximal urethra such as trauma, duplicity and stenosis, prostatic utricle, urethral-vaginal fistulas and urogenital sinus anomalies. It provides much better exposure than the...

Considerations on the food fortification policy in Brazil.

Revista brasileira de hematologia e hemoterapia

Martins JM.
PMID: 23284266
Rev Bras Hematol Hemoter. 2011;33(2):158-63. doi: 10.5581/1516-8484.20110039.

Government health authorities approved, in December 2002, the ANVISA (National Sanitary Vigilance Agency) resolution number 344, making the addition of iron and folic acid to all wheat and maize flours industrialized in Brazil obligatory. After a brief review of...

Vibrational and electronic structure analysis of a carbon dioxide interaction with functionalized single-walled carbon nanotubes.

The journal of physical chemistry. A

Paura EN, da Cunha WF, de Oliveira Neto PH, e Silva GM, Martins JB, Gargano R.
PMID: 23425025
J Phys Chem A. 2013 Apr 04;117(13):2854-61. doi: 10.1021/jp312622s. Epub 2013 Mar 05.

Electronic and vibrational properties of different single-walled carbon nanotubes (SWNTs) interacting with a CO2 molecule are investigated through the use of density functional theory (DFT) calculations and the discrete variable representation (DVR) method, respectively. We observed a considerable geometry...

4,7-Diphenyl-1,10-phenanthroline methanol hemisolvate.

Acta crystallographica. Section E, Structure reports online

Martins JP, Martín-Ramos P, Sobral AJ, Ramos Silva M.
PMID: 24046600
Acta Crystallogr Sect E Struct Rep Online. 2013 Jun 08;69:o1018. doi: 10.1107/S1600536813014682. eCollection 2013.

The asymmetric unit of the title compound, C24H16N2·0.5CH3OH, is comprised of two independent bathophenanthroline mol-ecules (systematic name: 4,7-diphenyl-1,10-phenanthroline) and one methanol mol-ecule. The bathophenanthroline mol-ecules are not planar as there is a considerable rotation of all terminal phenyl rings...

Utilizing self-exchange to address the binding of carboxylic acid ligands to CdSe quantum dots.

Journal of the American Chemical Society

Fritzinger B, Capek RK, Lambert K, Martins JC, Hens Z.
PMID: 20608680
J Am Chem Soc. 2010 Jul 28;132(29):10195-201. doi: 10.1021/ja104351q.

We use solution NMR techniques to analyze the organic/inorganic interface of CdSe quantum dots (Q-CdSe) synthesized using oleic acid as a surfactant. It is shown that the resulting Q-CdSe are stabilized by tightly bound oleic acid species that only...

[Pleasure and suffering in the nursing group: reflection to the light of Dejour psychodynamics].

Revista da Escola de Enfermagem da U S P

Martins JT, Robazzi ML, Bobroff MC.
PMID: 21337797
Rev Esc Enferm USP. 2010 Dec;44(4):1107-11. doi: 10.1590/s0080-62342010000400036.

The present study is a theoretical reflection which approaches the feelings of pleasure and suffering in the nursing team work in the perspective of the psychodynamic under Dejour optics. This reflection contributes to elucidate the importance of the organization...

Showing 25 to 36 of 652 entries