Zobrazeno 1 - 10 of 30 pro vyhledávání: '"J. A. Semlyen"'
1
Analysis of anisotropic electron spin polarization in the photosynthetic bacterium Rhodospirillum rubrum
Autor: Arnold J. Hoff, D. J. Riley, P. J. Hore, G. Zwanenburg, J. J. Semlyen
Publikováno v: Biochimica et Biophysica Acta (BBA) - Bioenergetics. 1141:221-230
The transient electron paramagnetic resonance spectrum of pre-reduced, perdeuterated cells of the photosynthetic bacterium Rhodospirillum rubrum is analysed using a quantum mechanical description of the spin dynamics. The spectrum, of the reduced sec
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cdfb70d9d909c86893beba9b51446bef
https://doi.org/10.1016/0005-2728(93)90046-i
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2
Viscosity dependence of the excimer to monomer fluorescence ratio. Cyclic and linear polysiloxanes
Autor: J. A. Semlyen, Arturo Horta, I. Hernandez Fuentes, C. Salom, Inés F. Piérola, António L. Maçanita, Stephen J. Clarson
Publikováno v: Macromolecules. 24:6827-6831
The fluorescence ratio of poly(methylphenylsiloxane) in THF/dioxane and THF/methanol mixtures was studied as a function of solvent viscosity and polymer-reduced viscosity in order to quantify the relative contribution from each type of excimer, takin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f808a2a44395d8e1ef1b623542f5a5d9
https://doi.org/10.1021/ma00026a004
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3
A study of the properties and topological trapping of cyclic poly(dimethylsiloxane) in poly(2,6-dimethyl-1,4-phenylene oxide) networks
Autor: J. A. Semlyen, H. L. Frisch, Y. Hua, W. Huang
Publikováno v: Journal of Polymer Science Part A: Polymer Chemistry. 28:1807-1812
Polymeric catenanes have been made from poly(2,6-dimethyl-1,4-phenylene oxide) crosslinked in the presence of several, paucidisperse poly(dimethylsiloxane) cyclics of varying degrees of polymerization. The fraction of cyclic threaded or captured by t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53cdd43692b523b1be49ebd043c0783a
https://doi.org/10.1002/pola.1990.080280712
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5
A Cyclic Monomer of Tetraethyleneglycol Succinate
Autor: Leroy Cronin, B. R. Wood, Madeleine H. Moore, J. A. Semlyen
Publikováno v: Scopus-Elsevier
The title compound, 1,4,7,10,13-pentaoxacycloheptadecane-14,17-dione, C12H20O7, was prepared in a mixture of large ether–ester rings and isolated by preparative gel permeation chromatography. The maximum internal diameter of its cavity was found to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::934b5a559322aa25372ed3150b2fe8a4
https://doi.org/10.1107/s0108270197002928
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8
Electron spin polarization in photosynthetic bacteria. Anisotropic chemical reactivity
Autor: T.J. Schaafsma, Peter Gast, J. J. Semlyen, Arnold J. Hoff, D. J. Riley, P. J. Hore, D.A. Hunter, F.G.H. van Wijk
Publikováno v: Research on chemical intermediates, 16, 127-139
Research on chemical intermediates 16 (1991)
Research on Chemical Intermediates, 16(2), 127-139. SPRINGER
It is shown that electron spin polarization can be used to probe the anisotropy of singlet-triplet interconversion of radical pairs involved in photosynthetic charge separation. Anisotropic polarization may be observed with non-oriented reaction cent
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9495e9ff911f62043adb63cf603a3324
https://doi.org/10.1163/156856791x00219
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9
A cyclic dimer of ethyleneglycol maleate
Autor: B. R. Wood, S. P. Foxon, J. A. Semlyen
Publikováno v: Acta Crystallographica Section C Crystal Structure Communications. 55:IUC9900115
The title compound, [CH2CH2OCOCHCHCOO]2, was prepared using dilute-solution ring-chain transesterification reactions. The cyclic dimer, formed as part of a population of ring compounds, was found to crystallize readily from chloroform solution.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ae9385201f56f21326ac37f49570f5d
https://doi.org/10.1107/s0108270199098704
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