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Showing 1 to 12 of 329 entries
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Transition metal (Ti, Mo, Nb, W) nitride catalysts for lignin depolymerisation.

Chemical communications (Cambridge, England)

Chen L, Korányi TI, Hensen EJ.
PMID: 27374024
Chem Commun (Camb). 2016 Jul 19;52(60):9375-8. doi: 10.1039/c6cc04702e.

Metal nitrides are promising catalysts for depolymerisation of lignin in supercritical ethanol; cheap and abundant titanium nitride affords an aromatic monomer yield of 19 wt% from soda lignin. The reaction mechanism is discussed on the basis of the products...

Direct and mediated effects onBactrocera oleae (Gmelin) (Diptera; Tephritidae) of natural polyphenols and some of related synthetic compounds: Structure-activity relationships.

Journal of chemical ecology

Capasso R, Evidente A, Tremblay E, Sala A, Santoro C, Cristinzio G, Scognamiglio F.
PMID: 24242314
J Chem Ecol. 1994 May;20(5):1189-99. doi: 10.1007/BF02059753.

Among the main polyphenols occurring in olive oil vegetation waters (VW), catechol showed the most deterrent action on the oviposition ofBactrocera oleae (Gmelin); 4-methylcatechol was less active, whereas hydroxytyrosol and tyrosol were inactive. In contrast, synthetico-quinone was found to...

Partial purification and biochemical characterization of peroxidase from rosemary (Rosmarinus officinalis L.) leaves.

Advanced biomedical research

Aghelan Z, Shariat SZ.
PMID: 26380244
Adv Biomed Res. 2015 Jul 27;4:159. doi: 10.4103/2277-9175.161586. eCollection 2015.

BACKGROUND: In this study, it is aimed to purify POD from leaves of Rosmarinus officinalis L. and determine its some biochemical properties. PODs are a group of oxidoreductase enzymes that catalyze the oxidation of a wide variety of phenolic...

Kinetic Study of the Gas-Phase Reactions of Nitrate Radicals with Methoxyphenol Compounds: Experimental and Theoretical Approaches.

The journal of physical chemistry. A

Lauraguais A, El Zein A, Coeur C, Obeid E, Cassez A, Rayez MT, Rayez JC.
PMID: 27073983
J Phys Chem A. 2016 May 05;120(17):2691-9. doi: 10.1021/acs.jpca.6b02729. Epub 2016 Apr 25.

The gas-phase reactions of five methoxyphenols (three disubstituted and two trisubstituted) with nitrate radicals were studied in an 8000 L atmospheric simulation chamber at atmospheric pressure and 294 ± 2 K. The NO3 rate constants were investigated with the...

Towards Understanding Photodegradation Pathways in Lignins: The Role of Intramolecular Hydrogen Bonding in Excited States.

The journal of physical chemistry letters

Young JD, Staniforth M, Dean JC, Roberts GM, Mazzoni F, Karsili TN, Ashfold MN, Zwier TS, Stavros VG.
PMID: 26270505
J Phys Chem Lett. 2014 Jun 19;5(12):2138-43. doi: 10.1021/jz500895w. Epub 2014 Jun 05.

The photoinduced dynamics of the lignin building blocks syringol, guaiacol, and phenol were studied using time-resolved ion yield spectroscopy and velocity map ion imaging. Following irradiation of syringol and guaiacol with a broad-band femtosecond ultraviolet laser pulse, a coherent...

Triacontanol Reduces Transplanting Shock in Machine-Transplanted Rice by Improving the Growth and Antioxidant Systems.

Frontiers in plant science

Li X, Zhong Q, Li Y, Li G, Ding Y, Wang S, Liu Z, Tang S, Ding C, Chen L.
PMID: 27379149
Front Plant Sci. 2016 Jun 17;7:872. doi: 10.3389/fpls.2016.00872. eCollection 2016.

Machine transplantation results in serious transplant shock in seedlings and results in a longer recover stage, which negatively impacts the growth of low-position tillers and the yield of machine-transplanted rice. A barrel experiment was conducted to examine the effect...

Determination of phenolic compounds in air by using cyclodextrin-silica hybrid microporous composite samplers.

Talanta

Mauri-Aucejo AR, Ponce-Català P, Belenguer-Sapiña C, Amorós P.
PMID: 25618708
Talanta. 2015 Mar;134:560-567. doi: 10.1016/j.talanta.2014.11.057. Epub 2014 Dec 02.

An analytical method for the determination of phenolic compounds in air samples based on the use of cyclodextrin-silica hybrid microporous composite samplers is proposed. The method allows the determination of phenol, guaiacol, cresol isomers, eugenol, 4-ethylphenol and 4-ethylguaiacol in...

Aggregation pheromone system of adult gregarious desert locust schistocerca gregaria (forskal).

Journal of chemical ecology

Torto B, Obeng-Ofori D, Njagi PG, Hassanali A, Amiani H.
PMID: 24242667
J Chem Ecol. 1994 Jul;20(7):1749-62. doi: 10.1007/BF02059896.

Six electrophysiologically active aromatic compounds, viz., anisole, benzaldehyde, veratrole, guaiacol, phenylacetonitrile, and phenol, were identified in the volatiles of older-adult male desert locust. Young adults and females of all age groups produced none or only trace quantities of these...

Functional analysis of thyroid peroxidase gene mutations detected in patients with thyroid dyshormonogenesis.

International journal of endocrinology

Guria S, Bankura B, Balmiki N, Pattanayak AK, Das TK, Sinha A, Chakrabarti S, Chowdhury S, Das M.
PMID: 24829575
Int J Endocrinol. 2014;2014:390121. doi: 10.1155/2014/390121. Epub 2014 Apr 13.

Thyroid peroxidase (TPO) is the key enzyme in the biosynthesis of thyroid hormones. We aimed to identify the spectrum of mutations in the TPO gene leading to hypothyroidism in the population of West Bengal to establish the genetic etiology...

Rate Coefficients for the Gas-Phase Reactions of Hydroxyl Radicals with a Series of Methoxylated Aromatic Compounds.

The journal of physical chemistry. A

Lauraguais A, Bejan I, Barnes I, Wiesen P, Coeur C.
PMID: 25989938
J Phys Chem A. 2015 Jun 18;119(24):6179-87. doi: 10.1021/acs.jpca.5b03232. Epub 2015 Jun 03.

Rate coefficients for the reactions of hydroxyl radicals (OH) with a series of oxygenated aromatics (two methoxybenzene and five methoxyphenol isomers) have been obtained using the relative kinetic method in 1080 and 480 L photoreactors at the University of...

Selective catalytic conversion of guaiacol to phenols over a molybdenum carbide catalyst.

Chemical communications (Cambridge, England)

Ma R, Cui K, Yang L, Ma X, Li Y.
PMID: 26024322
Chem Commun (Camb). 2015 Jun 28;51(51):10299-301. doi: 10.1039/c5cc01900a.

An activated carbon supported α-molybdenum carbide catalyst (α-MoC1-x/AC) showed remarkable activity in the selective deoxygenation of guaiacol to substituted mono-phenols in low carbon number alcohol solvents. Combined selectivities of up to 85% for phenol and alkylphenols were obtained at...

Evaluation of Smoky Taste in Cocoa Powder.

Journal of agricultural and food chemistry

Serra Bonvehí J, Ventura Coll F.
PMID: 10554288
J Agric Food Chem. 1998 Feb 16;46(2):620-624. doi: 10.1021/jf9705429.

The aim of this study was to determine the levels of nine phenols (phenol, guaiacol derivatives, xylenols, and cresols) by using a GC/MS technique in smoked samples under control, commercial samples taken from contaminated batches, and uncontaminated samples. The...

Showing 1 to 12 of 329 entries