Results 21 to 30 of about 6,102,630 (281)

Carbenoid-mediated nucleophilic “hydrolysis” of 2-(dichloromethylidene)-1,1,3,3-tetramethylindane with DMSO participation, affording access to one-sidedly overcrowded ketone and bromoalkene descendants§

Beilstein Journal of Organic Chemistry, 2014
2-(Dichloromethylidene)-1,1,3,3-tetramethylindane was “hydrolyzed” by solid KOH in DMSO as the solvent at ≥100 °C through an initial chlorine particle transfer to give a Cl,K-carbenoid.
Rudolf Knorr, Thomas Menke, Johannes Freudenreich, Claudio Pires   +3 more
doaj   +1 more source

Detection of Frozen Soil Using Sentinel-1 SAR Data

Remote Sensing, 2018
The objective of this paper is to evaluate the potential of Sentinel-1 Synthetic Aperture Radar “SAR” data (C-band) for monitoring agricultural frozen soils.
Nicolas Baghdadi, Hassan Bazzi, Mohammad El Hajj, Mehrez Zribi   +3 more
doaj   +1 more source

Demonstration of a state-insensitive, compensated nanofiber trap [PDF]

, 2012
We report the experimental realization of an optical trap that localizes single Cs atoms ≃ 215 nm from surface of a dielectric nanober. By operating at magic wavelengths for pairs of counterpropagating red- and blue-detuned trapping beams, dierential ...
Alton, D. J., Choi, K. S., Ding, D., Goban, A., Kimble, H. J., Lacroûte, C., Pototschnig, M., Stern, N. P., Thiele, T.   +8 more
core   +3 more sources

A quantitative approach to nucleophilic organocatalysis

Beilstein Journal of Organic Chemistry, 2012
The key steps in most organocatalytic cyclizations are the reactions of electrophiles with nucleophiles. Their rates can be calculated by the linear free-energy relationship log k(20 °C) = sN(E + N), where electrophiles are characterized by one parameter
Herbert Mayr, Sami Lakhdar, Biplab Maji, Armin R. Ofial   +3 more
doaj   +1 more source

Enhanced Photocatalytic Activity of Iron-Doped ZnO Nanowires for Water Purification

Applied Sciences, 2017
In order to improve the photocatalytic efficiency of ZnO nanowires, iron-doped ZnO nanowires (ZnO:Fe NWs) were successfully synthesized. The morphology, optical properties and photocatalytic performance of ZnO:Fe NWs were studied by scanning electron ...
Yamina Ghozlane Habba, Martine Capochichi-Gnambodoe, Yamin Leprince-Wang   +2 more
doaj   +1 more source

Non-Abelian Born-Infeld Action and Type I - Heterotic Duality (II): Nonrenormalization Theorems [PDF]

, 2002
Type I - heterotic duality in D=10 predicts various relations and constraints on higher order F^n couplings at different string loop levels on both sides.
Antoniadis, Antoniadis, Bachas, Bachas, Buchbinder, D'Hoker, Dine, Dine, Ellis, Fay, Foerger, Gava, Green, Green, Green, Gross, Iengo, Iengo, Jengo, Jengo, Jengo, Kiritsis, Koerber, Lechtenfeld, Lerche, Lerche, Lerche, Lerche, Lerche, Lerche, Lerche, Lerche, Lerche, Mayr, Medina, Metsaev, Minahan, Mizrachi, Morozov, Morozov, Mumford, Paban, Polchinski, S. Stieberger, Schellekens, Schellekens, Sethi, Stieberger, Stieberger, T.R. Taylor, Tseytlin, Tseytlin, Tseytlin, Tseytlin, Verlinde, Witten, Yasuda, Yasuda, Zhu   +58 more
core   +2 more sources

Observation and absolute frequency measurements of the 1S0 - 3P0 optical clock transition in ytterbium [PDF]

, 2005
We report the direct excitation of the highly forbidden (6s^2) 1S0 - (6s6p) 3P0 optical transition in two odd isotopes of ytterbium. As the excitation laser frequency is scanned, absorption is detected by monitoring the depletion from an atomic cloud at ~
A. Bartels, C. Hoyt, C. Oates, H. Katori, J.-P. Wallerand, J. I. Kim, L. Hollberg, S. Diddams, T. Fortier, T. M. Ramond, W. C. Martin, Z. Barber   +11 more
core   +1 more source

Protecting groundwater in intensive agricultural areas through irrigation with treated wastewater: focus on nitrate, salt, and Escherichia coli

Cleaner Water
A set of 4 soil column duplicates was irrigated with treated wastewater to study the possible leaching of nitrate, salt, and Escherichia coli to groundwater. The reclaimed water was a municipal secondary effluent, stored for 5 days to attenuate microbial
Barbara Casale, Angela Libutti, Carlo Salerno, Giovanni Berardi, Pompilio Vergine   +4 more
doaj   +1 more source

Higher order contributions to the effective action of N=2 super Yang-Mills

, 2004
We apply heat kernel techniques in N=1 superspace to compute the one-loop effective action to order $F^5$ for chiral superfields coupled to a non-Abelian super Yang-Mills background.
A.T. Banin, B.A. Ovrut, C.V. Johnson, D.T. Grasso, Darren T Grasso, E. Witten, I.L. Buchbinder, I.L. Buchbinder, I.L. Buchbinder, I.N. McArthur, J. Wess, J.M. Maldacena, M. de Roo, M.R. Douglas, O. Aharony, P. Koerber, P. Koerber, R. Medina, S.J. Gates, S.M. Kuzenko, T.D. Gargett   +20 more
core   +1 more source

Microsolvation and sp2-stereoinversion of monomeric α-(2,6-di-tert-butylphenyl)vinyllithium as measured by NMR

Beilstein Journal of Organic Chemistry, 2014
The β-unsubstituted title compound dissolves in THF as a uniformly trisolvated monomer, whereas it forms exclusively disolvated monomers in tert-butyl methyl ether, Et2O, TMEDA, or toluene with TMEDA (1.4 equiv).
Rudolf Knorr, Monika Knittl, Eva C. Rossmann   +2 more
doaj   +1 more source