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Showing 13 to 24 of 9169 entries
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Field effect transistors and photodetectors based on nanocrystalline graphene derived from electron beam induced carbonaceous patterns.

Nanotechnology

Kurra N, Bhadram VS, Narayana C, Kulkarni GU.
PMID: 23036939
Nanotechnology. 2012 Oct 26;23(42):425301. doi: 10.1088/0957-4484/23/42/425301. Epub 2012 Oct 04.

We describe a transfer-free method for the fabrication of nanocrystalline graphene (nc-graphene) on SiO(2) substrates directly from patterned carbonaceous deposits. The deposits were produced from the residual hydrocarbons present in the vacuum chamber without any external source by using...

Transition-state enthalpy and entropy effects on reactivity and selectivity in hydrogenolysis of n-alkanes.

Journal of the American Chemical Society

Flaherty DW, Iglesia E.
PMID: 24266427
J Am Chem Soc. 2013 Dec 11;135(49):18586-99. doi: 10.1021/ja4093743. Epub 2013 Nov 22.

Statistical mechanics and transition state (TS) theory describe rates and selectivities of C-C bond cleavage in C2-C10 n-alkanes on metal catalysts and provide a general description for the hydrogenolysis of hydrocarbons. Mechanistic interpretation shows the dominant role of entropy,...

Thermodiffusion in multicomponent .

NPJ microgravity

Galliero G, Bataller H, Bazile JP, Diaz J, Croccolo F, Hoang H, Vermorel R, Artola PA, Rousseau B, Vesovic V, Bou-Ali MM, Ortiz de Zárate JM, Xu S, Zhang K, Montel F, Verga A, Minster O.
PMID: 28879228
NPJ Microgravity. 2017 Aug 11;3:20. doi: 10.1038/s41526-017-0026-8. eCollection 2017.

Compositional grading within a mixture has a strong impact on the evaluation of the pre-exploitation distribution of hydrocarbons in underground layers and sediments. Thermodiffusion, which leads to a partial diffusive separation of species in a mixture due to the...

Inhibition of Carcinogen-Activating Cytochrome P450 Enzymes by Xenobiotic Chemicals in Relation to Antimutagenicity and Anticarcinogenicity.

Toxicological research

Shimada T.
PMID: 28443179
Toxicol Res. 2017 Apr;33(2):79-96. doi: 10.5487/TR.2017.33.2.079. Epub 2017 Apr 15.

A variety of xenobiotic chemicals, such as polycyclic aromatic hydrocarbons (PAHs), aryl- and heterocyclic amines and tobacco related nitrosamines, are ubiquitous environmental carcinogens and are required to be activated to chemically reactive metabolites by xenobiotic-metabolizing enzymes, including cytochrome P450...

Construction of a cryogen-free thermal desorption gas chromatographic system with off-the-shelf components for monitoring ambient volatile organic compounds.

Journal of separation science

Ou-Yang CF, Liao WC, Wang PC, Fan GJ, Hsiao CC, Chuang MT, Chang CC, Lin NH, Wang JL.
PMID: 26924196
J Sep Sci. 2016 Apr;39(8):1489-99. doi: 10.1002/jssc.201501336. Epub 2016 Apr 06.

An automated gas chromatographic system aimed at performing unattended measurements of ambient volatile organic compounds was configured and tested. By exploiting various off-the-shelf components, the thermal desorption unit was easily assembled and can be connected with any existing commercial...

Carbon-Rich Monolayers on ITO as Highly Sensitive Platforms for Detecting Polycyclic Aromatic Hydrocarbons in Water: The Case of Pyrene.

Chemistry (Weinheim an der Bergstrasse, Germany)

Muñoz J, Crivillers N, Mas-Torrent M.
PMID: 28881063
Chemistry. 2017 Nov 02;23(61):15289-15293. doi: 10.1002/chem.201703264. Epub 2017 Oct 13.

The determination of polycyclic aromatic hydrocarbons (PAHs) in water at low levels is a current challenge given their great impact on the health and safety of the public. Here, a novel pyrene-based self-assembled monolayer (SAM) platform is exploited as...

Direct Mechanism of the First Carbon-Carbon Bond Formation in the Methanol-to-Hydrocarbons Process.

Angewandte Chemie (International ed. in English)

Wu X, Xu S, Zhang W, Huang J, Li J, Yu B, Wei Y, Liu Z.
PMID: 28503894
Angew Chem Int Ed Engl. 2017 Jul 24;56(31):9039-9043. doi: 10.1002/anie.201703902. Epub 2017 May 31.

In the past two decades, the reaction mechanism of C-C bond formation from either methanol or dimethyl ether (DME) in the methanol-to-hydrocarbons (MTH) process has been a highly controversial issue. Described here is the first observation of a surface...

BN Doping and the Photochemistry of Polyaromatic Hydrocarbons: Photocyclization of Hexaphenyl Benzene and Hexaphenyl Borazine.

The journal of physical chemistry. A

Snyder JA, Grüninger P, Bettinger HF, Bragg AE.
PMID: 28949535
J Phys Chem A. 2017 Nov 09;121(44):8359-8367. doi: 10.1021/acs.jpca.7b08190. Epub 2017 Oct 26.

Boron-nitrogen doping of polyaromatic hydrocarbon (PAH) materials can be used to tune their electronic properties while preserving the structural characteristics of pure hydrocarbons. Many multicycle PAHs can be synthesized photochemically; in contrast, very little is known about the photochemistry...

Heterogeneous Oxidation of Catechol.

The journal of physical chemistry. A

Pillar-Little EA, Zhou R, Guzman MI.
PMID: 26403273
J Phys Chem A. 2015 Oct 15;119(41):10349-59. doi: 10.1021/acs.jpca.5b07914. Epub 2015 Oct 01.

Natural and anthropogenic emissions of aromatic hydrocarbons from biomass burning, agro-industrial settings, and fossil fuel combustion contribute precursors to secondary aerosol formation (SOA). How these compounds are processed under humid tropospheric conditions is the focus of current attention to...

Effect of water accommodated fraction of 0# diesel oil and crude oil on EROD activity of liver of Sparus macrocephlus and its mRNA expression.

Ecotoxicology and environmental safety

Lei L, Shen X, Jiang M.
PMID: 27639698
Ecotoxicol Environ Saf. 2016 Dec;134:250-255. doi: 10.1016/j.ecoenv.2016.08.027. Epub 2016 Sep 15.

We studied the effect of water accommodated fractions (WAF) of 0# diesel and crude oil on ethoxy resorufin o-deethylase (EROD) activity and CYP1A1 mRNA expression quantity in the liver of Sparus macrocephlus. We found that there were some differences...

Electronic spectra and excited-state dynamics of acridine and its hydrated clusters.

The Journal of chemical physics

Harthcock C, Zhang J, Kong W, Mitsui M, Ohshima Y.
PMID: 28390373
J Chem Phys. 2017 Apr 07;146(13):134311. doi: 10.1063/1.4979631.

We combine results from several different experiments to investigate the photophysics of acridine (Ac) and its hydrated clusters in the gas phase. Our findings are also compared with results from condensed phase studies. Similar to measurements of Ac dissolved...

Establishing Atmospheric Pressure Chemical Ionization Efficiency Scale.

Analytical chemistry

Rebane R, Kruve A, Liigand P, Liigand J, Herodes K, Leito I.
PMID: 26943482
Anal Chem. 2016 Apr 05;88(7):3435-9. doi: 10.1021/acs.analchem.5b04852. Epub 2016 Mar 09.

Recent evidence has shown that the atmospheric pressure chemical ionization (APCI) mechanism can be more complex than generally assumed. In order to better understand the processes in the APCI source, for the first time, an ionization efficiency scale for...

Showing 13 to 24 of 9169 entries