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Showing 1 to 12 of 224 entries
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Preparation of pyranylidene complexes of ruthenium.

Dalton transactions (Cambridge, England : 2003)

Albertin G, Antoniutti S, Bortoluzzi M, Botter A, Castro J.
PMID: 25802146
Dalton Trans. 2015 Apr 28;44(16):7411-8. doi: 10.1039/c5dt00418g.

The reaction of the chloro-complex RuCl(η(5)-C5H5)(PPh3)[P(OMe)3] with alkylpropiolates HC≡CCOOR1 in alcohol R2OH affords pyranylidene derivatives [Ru(η(5)-C5H5){=C(COOR1)C(H)C(H)C(OR1)O}(PPh3){P(OMe)3}]BPh4 (1, 3) and alkoxycarbene complexes [Ru(η(5)-C5H5){=C(OR2)(CH2COOR1)}(PPh3){P(OMe)3}]BPh4 (2, 4). A reaction path for the formation of compounds 1-4, involving reactions on a vinylidene intermediate...

Improving animal welfare using continuous nalbuphine infusion in a long-term rat model of sepsis.

Intensive care medicine experimental

Jeger V, Arrigo M, Hildenbrand FF, Müller D, Jirkof P, Hauffe T, Seifert B, Arras M, Spahn DR, Bettex D, Rudiger A.
PMID: 28429311
Intensive Care Med Exp. 2017 Dec;5(1):23. doi: 10.1186/s40635-017-0137-2. Epub 2017 Apr 20.

BACKGROUND: Sepsis research relies on animal models to investigate the mechanisms of the dysregulated host response to infection. Animal welfare concerns request the use of potent analgesics for the Refinement of existing sepsis models, according to the 3Rs principle....

Photonic band structure calculations using scattering matrices.

Physical review. E, Statistical, nonlinear, and soft matter physics

Botten LC, Nicorovici NA, McPhedran RC, Sterke CM, Asatryan AA.
PMID: 11690166
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Oct;64(4):046603. doi: 10.1103/PhysRevE.64.046603. Epub 2001 Sep 20.

We consider band structure calculations of two-dimensional photonic crystals treated as stacks of one-dimensional gratings. The gratings are characterized by their plane wave scattering matrices, the calculation of which is well established. These matrices are then used in combination...

Effects of disorder on wave propagation in two-dimensional photonic crystals.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Asatryan AA, Robinson PA, Botten LC, McPhedran RC, Nicorovici NA, Martijn de Sterke C.
PMID: 11970517
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Nov;60(5):6118-27. doi: 10.1103/physreve.60.6118.

The electromagnetic transmittance of disordered two-dimensional photonic crystals composed of circular cylinders is investigated as a function of wavelength and polarization. At short wavelengths, the transmittance shows a band structure similar to that found in the optical absorption spectrum...

The adaptation of insects to plant protease inhibitors.

Journal of insect physiology

Bolter C, Jongsma MA.
PMID: 12770458
J Insect Physiol. 1997 Oct;43(10):885-895. doi: 10.1016/s0022-1910(97)00040-1.

Plants and herbivores have been co-evolving for thousands of years, and as a result, plants have defence mechanisms that offer protection against many herbivores such as nematodes, insects, birds and mammals. Only when a herbivore has managed to adapt...

Wide-angle coupling into rod-type photonic crystals with ultralow reflectance.

Physical review. E, Statistical, nonlinear, and soft matter physics

Botten LC, White TP, de Sterke CM, McPhedran RC.
PMID: 17025553
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Aug;74(2):026603. doi: 10.1103/PhysRevE.74.026603. Epub 2006 Aug 10.

We describe the surprising phenomenon of near-perfect coupling from free space into uniform two-dimensional rod-type photonic crystals over a wide range of incident angles. This behavior is shown to be a generic feature of many rod-type photonic crystal structures...

Dynamics of cylindrically converging precursor plasma flow in wire-array Z -pinch experiments.

Physical review. E, Statistical, nonlinear, and soft matter physics

Bott SC, Lebedev SV, Ampleford DJ, Bland SN, Chittenden JP, Ciardi A, Haines MG, Jennings C, Sherlock M, Hall G, Rapley J, Beg FN, Palmer J.
PMID: 17155178
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Oct;74(4):046403. doi: 10.1103/PhysRevE.74.046403. Epub 2006 Oct 12.

This paper summarizes the present understanding of the processes leading to precursor column formation in cylindrical wire arrays on the 1 MA MAGPIE generator at Imperial College London. Direct experimental measurements of the diameter variation during the collapse and...

A study of impurities in intermediates and 3,4-methylenedioxymethamphetamine (MDMA) samples produced via reductive amination routes.

Forensic science international

Gimeno P, Besacier F, Bottex M, Dujourdy L, Chaudron-Thozet H.
PMID: 16226151
Forensic Sci Int. 2005 Dec 20;155(2):141-57. doi: 10.1016/j.forsciint.2004.11.013.

Impurities found in various sources of precursors (sassafras oil, safrol, isosafrol, piperonal), intermediates (beta-nitroisosafrol, piperonylmethylketone (PMK)) and final product (3,4-methylenedioxymethamphetamine (MDMA)) are presented and discussed. Particular attention is paid to the chemical origin of each impurity found in the...

Modal method for classical diffraction by slanted lamellar gratings.

Journal of the Optical Society of America. A, Optics, image science, and vision

Campbell S, Botten LC, McPhedran RC, de Sterke CM.
PMID: 18830319
J Opt Soc Am A Opt Image Sci Vis. 2008 Oct;25(10):2415-26. doi: 10.1364/josaa.25.002415.

We consider lamellar gratings made of dielectric or lossy materials used in classical diffraction mounts. We show how the modal diffraction formulation may be generalized to deal with slanted lamellar gratings and illustrate the accuracy and versatility of the...

Modifying wire-array Z-pinch ablation structure using coiled arrays.

Physical review letters

Hall GN, Chittenden JP, Bland SN, Lebedev SV, Bott SC, Jennings C, Palmer JB, Suzuki-Vidal F.
PMID: 18352483
Phys Rev Lett. 2008 Feb 15;100(6):065003. doi: 10.1103/PhysRevLett.100.065003. Epub 2008 Feb 14.

A new wire-array configuration has been used to control the modulation of ablated plasma flow for the first time. Cylindrical aluminum coiled arrays, in which each straight wire is replaced with a single helix, were driven by a 1...

Long wavelength behavior of the fundamental mode in microstructured optical fibers.

Optics express

Wilcox S, Botten L, de Sterke C, Kuhlmey B, McPhedran R, Fussell D, Tomljenovic-Hanic S.
PMID: 19495080
Opt Express. 2005 Mar 21;13(6):1978-84. doi: 10.1364/opex.13.001978.

Using a novel computational method, the fundamental mode in index-guided microstructured optical fibers with genuinely infinite cladding is studied. It is shown that this mode has no cut-off, although its area grows rapidly when the wavelength crosses a transition...

Coupled waveguide modes in hexagonal photonic crystals.

Optics express

Brownless JS, Mahmoodian S, Dossou KB, Lawrence FJ, Botten LC, de Sterke CM.
PMID: 21164883
Opt Express. 2010 Nov 22;18(24):25346-60. doi: 10.1364/OE.18.025346.

We investigate the modes of coupled waveguides in a hexagonal photonic crystal. We find that for a substantial parameter range the coupled waveguide modes have dispersion relations exhibiting multiple intersections, which we explain both intuitively and using a rigorous...

Showing 1 to 12 of 224 entries