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Showing 1 to 12 of 247 entries
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Insights into the mechanism of extraction of uranium (VI) from nitric acid solution into an ionic liquid by using tri-n-butyl phosphate.

Chemphyschem : a European journal of chemical physics and physical chemistry

Gaillard DC, Boltoeva M, Billard I, Georg S, Mazan V, Ouadi A, Ternova D, Hennig C.
PMID: 26149535
Chemphyschem. 2015 Aug 24;16(12):2653-62. doi: 10.1002/cphc.201500283. Epub 2015 Jul 06.

We present new results on the liquid-liquid extraction of uranium (VI) from a nitric acid aqueous phase into a tri-n-butyl phosphate/1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (TBP/[C4 mim][Tf2 N]) phase. The individual solubilities of the ionic-liquid ions in the upper part of the...

Copper-Catalyzed Perfluoroalkylthiolation of Alkynes with Perfluoroalkanesulfenamides.

Chemistry (Weinheim an der Bergstrasse, Germany)

Tlili A, Alazet S, Glenadel Q, Billard T.
PMID: 27334703
Chemistry. 2016 Jul 11;22(29):10230-4. doi: 10.1002/chem.201601338. Epub 2016 Jun 23.

Copper-catalyzed direct perfluoroalkylthiolation of alkynes by using the corresponding perfluoroalkanesulfenamide reagent is reported. The selective mono- and bis-perfluoroalkylthiolation of alkynes can be conducted under very mild conditions (no base, room temperature) in very good to excellent yields. This approach,...

Polarization shaping for unidirectional rotational motion of molecules.

Physical review letters

Karras G, Ndong M, Hertz E, Sugny D, Billard F, Lavorel B, Faucher O.
PMID: 25815926
Phys Rev Lett. 2015 Mar 13;114(10):103001. doi: 10.1103/PhysRevLett.114.103001. Epub 2015 Mar 10.

Control of the orientation of the angular momentum of linear molecules is demonstrated by means of laser polarization shaping. For this purpose, we combine two orthogonally polarized and partially time-overlapped femtosecond laser pulses so as to produce a spinning...

Synthetic Approaches to Trifluoromethylselenolated Compounds.

Chemistry (Weinheim an der Bergstrasse, Germany)

Tlili A, Ismalaj E, Glenadel Q, Ghiazza C, Billard T.
PMID: 29072337
Chemistry. 2018 Mar 12;24(15):3659-3670. doi: 10.1002/chem.201704637. Epub 2017 Dec 12.

The association of trifluoromethyl group to chalcogens gives new fluorinated substituents with specific properties, mainly in term of lipophilicity. The trifluoromethylselenyl group is the last of the series that has been studied and despite pioneering approaches in the late...

Siderophore-Mediated Iron Dissolution from Nontronites Is Controlled by Mineral Cristallochemistry.

Frontiers in microbiology

Parrello D, Zegeye A, Mustin C, Billard P.
PMID: 27064911
Front Microbiol. 2016 Mar 31;7:423. doi: 10.3389/fmicb.2016.00423. eCollection 2016.

Bacteria living in oxic environments experience iron deficiency due to limited solubility and slow dissolution kinetics of iron-bearing minerals. To cope with iron deprivation, aerobic bacteria have evolved various strategies, including release of siderophores or other organic acids that...

Gentle Nearest Neighbors Boosting over Proper Scoring Rules.

IEEE transactions on pattern analysis and machine intelligence

Nock R, Ali WB, D'Ambrosio R, Nielsen F, Barlaud M.
PMID: 26353210
IEEE Trans Pattern Anal Mach Intell. 2015 Jan;37(1):80-93. doi: 10.1109/TPAMI.2014.2307877.

Tailoring nearest neighbors algorithms to boosting is an important problem. Recent papers study an approach, UNN, which provably minimizes particular convex surrogates under weak assumptions. However, numerical issues make it necessary to experimentally tweak parts of the UNN algorithm,...

Biology of the gametes of some teleost species.

Fish physiology and biochemistry

Billard R, Christen R, Cosson MP, Gatty JL, Letellier L, Renard P, Saad A.
PMID: 24233173
Fish Physiol Biochem. 1986 Oct;2(1):115-20. doi: 10.1007/BF02264079.

Our knowledge of the biology of fish gametes is still limited. Up to now research was short-term, aiming at solving practical questions connected with gamete storage and artificial insemination. More information on gamete biology is now available and has...

Correction to "assessing the dual activity of a chalcone-phthalocyanine conjugate: design, synthesis, and antivascular and photodynamic properties".

Molecular pharmaceutics

Tuncel S, Trivella A, Atilla D, Bennis K, Savoie H, Albrieux F, Delort L, Billard H, Dubois V, Ahsen V, Caldefie-Chézet F, Richard C, Boyle RW, Ducki S, Dumoulin F.
PMID: 25590168
Mol Pharm. 2015 Feb 02;12(2):663. doi: 10.1021/mp5008426. Epub 2015 Jan 15.

No abstract available.

New stable reagents for the nucleophilic trifluoromethylation. 1. Trifluoromethylation Of carbonyl compounds with N-formylmorpholine derivatives.

Organic letters

Billard T, Bruns S, Langlois BR.
PMID: 10891240
Org Lett. 2000 Jul 13;2(14):2101-3. doi: 10.1021/ol005987o.

A new stable equivalent of the trifluoromethyl anion has been synthesized from fluoroform. It reacts with nonenolizable carbonyl compounds such as the Ruppert's reagent.

A synthetic entry to furo[2,3-b]pyridin-4(1H)-ones and related furoquinolinones via iodocyclization.

Organic letters

Aillaud I, Bossharth E, Conreaux D, Desbordes P, Monteiro N, Balme G.
PMID: 16524281
Org Lett. 2006 Mar 16;8(6):1113-6. doi: 10.1021/ol053048w.

[reaction: see text] N-Methyl-4-alkoxy-3-alkynylpyridin-2(1H)-ones readily undergo iodine-promoted 5-endo-heteroannulation under mild conditions to 3-iodofuropyridinium triiodide salts in moderate to good yields. The latter may be dealkylated in situ upon exposure to an iodide anion to provide the corresponding 3-iodofuro[2,3-b]pyridin-4(1H)-ones. The...

Influence of structure on the optical limiting properties of nanotubes.

Optics letters

Izard N, Billaud P, Riehl D, Anglaret E.
PMID: 16007790
Opt Lett. 2005 Jun 15;30(12):1509-11. doi: 10.1364/ol.30.001509.

We investigate the role of carbon nanotubes structure on their optical limiting properties. Samples of different and well-characterized structural features are studied by optical limiting and pump-probe experiments. The influence of the diameter's size on the nano-object is demonstrated....

Extraction of lanthanides from aqueous solution by using room-temperature ionic liquid and supercritical carbon dioxide in conjunction.

Chemistry (Weinheim an der Bergstrasse, Germany)

Mekki S, Wai CM, Billard I, Moutiers G, Burt J, Yoon B, Wang JS, Gaillard C, Ouadi A, Hesemann P.
PMID: 16311989
Chemistry. 2006 Feb 08;12(6):1760-6. doi: 10.1002/chem.200500559.

For the first time, the study of a three-step extraction system of water/ionic liquid/supercritical CO2 has been performed. Extraction of trivalent lanthanum and europium from an aqueous nitric acid solution to a supercritical CO2 phase via an imidazolium-based ionic...

Showing 1 to 12 of 247 entries