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Showing 1 to 12 of 225 entries
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Highly Dispersed SiO(x)/Al2O3 Catalysts Illuminate the Reactivity of Isolated Silanol Sites.

Angewandte Chemie (International ed. in English)

Mouat AR, George C, Kobayashi T, Pruski M, van Duyne RP, Marks TJ, Stair PC.
PMID: 26398359
Angew Chem Int Ed Engl. 2015 Nov 02;54(45):13346-51. doi: 10.1002/anie.201505452. Epub 2015 Sep 23.

The reaction of γ-alumina with tetraethylorthosilicate (TEOS) vapor at low temperatures selectively yields monomeric SiO(x) species on the alumina surface. These isolated (-AlO)3Si(OH) sites are characterized by PXRD, XPS, DRIFTS of adsorbed NH3, CO, and pyridine, and (29)Si and...

Poster 339 Better Outcome Though Devastating Course: A Case Report.

PM & R : the journal of injury, function, and rehabilitation

Pruski A, Shin R, Qu X.
PMID: 27673093
PM R. 2016 Sep;8(9):S271. doi: 10.1016/j.pmrj.2016.07.508. Epub 2016 Sep 24.

No abstract available.

In Silico Design of DNP Polarizing Agents: Can Current Dinitroxides Be Improved?.

Chemphyschem : a European journal of chemical physics and physical chemistry

Perras FA, Sadow A, Pruski M.
PMID: 28599086
Chemphyschem. 2017 Aug 18;18(16):2279-2287. doi: 10.1002/cphc.201700299. Epub 2017 Jul 07.

Numerical calculations of enhancement factors offered by dynamic nuclear polarization in solids under magic angle spinning (DNP-MAS) were performed to determine the optimal EPR parameters for a dinitroxide polarizing agent. We found that the DNP performance of a biradical...

Disturbance Increases Microbial Community Diversity and Production in Marine Sediments.

Frontiers in microbiology

Galand PE, Lucas S, Fagervold SK, Peru E, Pruski AM, Vétion G, Dupuy C, Guizien K.
PMID: 27994581
Front Microbiol. 2016 Dec 02;7:1950. doi: 10.3389/fmicb.2016.01950. eCollection 2016.

Disturbance strongly impacts patterns of community diversity, yet the shape of the diversity-disturbance relationship remains a matter of debate. The topic has been of interest in theoretical ecology for decades as it has practical implications for the understanding of...

DNP-Enhanced Ultrawideline Solid-State NMR Spectroscopy: Studies of Platinum in Metal-Organic Frameworks.

The journal of physical chemistry letters

Kobayashi T, Perras FA, Goh TW, Metz TL, Huang W, Pruski M.
PMID: 27266444
J Phys Chem Lett. 2016 Jul 07;7(13):2322-7. doi: 10.1021/acs.jpclett.6b00860. Epub 2016 Jun 09.

Ultrawideline dynamic nuclear polarization (DNP)-enhanced (195)Pt solid-state NMR (SSNMR) spectroscopy and theoretical calculations are used to determine the coordination of atomic Pt species supported within the pores of metal-organic frameworks (MOFs). The (195)Pt SSNMR spectra, with breadths reaching 10...

Engineering Biological C-H Functionalization Leads to Allele-Specific Regulation of Histone Demethylases.

Journal of the American Chemical Society

Breski M, Dey D, Obringer S, Sudhamalla B, Islam K.
PMID: 27709909
J Am Chem Soc. 2016 Oct 19;138(41):13505-13508. doi: 10.1021/jacs.6b08653. Epub 2016 Oct 10.

Oxidative C-H hydroxylation of methyl groups, followed by their removal from DNA, RNA, or histones, is an epigenetic process critical to transcriptional reprogramming and cell fate determination. This reaction is catalyzed by Fe(II)-dependent dioxygenases using the essential metabolite 2-ketoglutarate...

Indirectly detected heteronuclear correlation solid-state NMR spectroscopy of naturally abundant 15N nuclei.

Solid state nuclear magnetic resonance

Althaus SM, Mao K, Stringer JA, Kobayashi T, Pruski M.
PMID: 24287060
Solid State Nucl Magn Reson. 2014 Feb-Apr;57:17-21. doi: 10.1016/j.ssnmr.2013.11.001. Epub 2013 Nov 12.

Two-dimensional indirectly detected through-space and through-bond (1)H{(15)N} solid-state NMR experiments utilizing fast magic angle spinning (MAS) and homonuclear multipulse (1)H decoupling are evaluated. Remarkable efficiency of polarization transfer can be achieved at a MAS rate of 40 kHz by...

Oxidative polymerization of 1,4-diethynylbenzene into highly conjugated poly(phenylene butadiynylene) within the channels of surface-functionalized mesoporous silica and alumina materials.

Journal of the American Chemical Society

Lin VS, Radu DR, Han MK, Deng W, Kuroki S, Shanks BH, Pruski M.
PMID: 12148994
J Am Chem Soc. 2002 Aug 07;124(31):9040-1. doi: 10.1021/ja025925o.

A polyalkynylene-based conducting polymer (molecular wire) has been synthesized within the Cu-functionalized mesoporous MCM-41 silica catalyst. Fluorescence and 13C solid-state NMR provided spectroscopic evidence that the synthesis of extended polymeric chains with a high degree of alignment requires homogeneously...

Nondemolition measurements of a single quantum spin using Josephson oscillations.

Physical review letters

Bulaevskii L, Hruska M, Shnirman A, Smith D, Makhlin Y.
PMID: 15169182
Phys Rev Lett. 2004 Apr 30;92(17):177001. doi: 10.1103/PhysRevLett.92.177001. Epub 2004 Apr 27.

We consider a single localized spin-1/2 between the singlet superconducting leads of a Josephson junction (e.g., a superconducting STM). For the spin subject to a dc magnetic field B parallel z, we study the spin dynamics and the possibility...

Identification of electron beam vibration sources by separation of magnetic distortion from electric distortion on scanning electron microscope imaging.

Journal of microscopy

Pluska M, Czerwinski A, Ratajczak J, Katcki J, Oskwarek Ł, Rak R.
PMID: 20500389
J Microsc. 2010 Mar;237(3):325-8. doi: 10.1111/j.1365-2818.2009.03252.x.

Different types of distortions in scanning electron microscopy require different methods of their elimination, and therefore influence of these types on particular elements of the SEM system should be known. The proposed method allows for separation of the direct...

Molecular ordering of mixed surfactants in mesoporous silicas: a solid-state NMR study.

Solid state nuclear magnetic resonance

Kobayashi T, Mao K, Wang SG, Lin VS, Pruski M.
PMID: 21392947
Solid State Nucl Magn Reson. 2011 May-Jun;39(3):65-71. doi: 10.1016/j.ssnmr.2011.02.001. Epub 2011 Feb 17.

The use of mixed surfactants in the synthesis of mesoporous silica nanoparticles (MSNs) is of importance in the context of adjusting pore structures, sizes and morphologies. In the present study, the arrangement of molecules in micelles produced from a...

Controlling reactivity of nanoporous catalyst materials by tuning reaction product-pore interior interactions: statistical mechanical modeling.

The Journal of chemical physics

Wang J, Ackerman DM, Lin VS, Pruski M, Evans JW.
PMID: 23574250
J Chem Phys. 2013 Apr 07;138(13):134705. doi: 10.1063/1.4798463.

Statistical mechanical modeling is performed of a catalytic conversion reaction within a functionalized nanoporous material to assess the effect of varying the reaction product-pore interior interaction from attractive to repulsive. A strong enhancement in reactivity is observed not just...

Showing 1 to 12 of 225 entries