8,058 research outputs found
Good old days of Molong / by J.C.L. Fitzpatrick.
No full textElectronic reproduction. Canberra, A.C.T. : National Library of Australia, 2011
Male-female relatedness and patterns of male reproductive investment in guppies
No full textInbreeding can cause reductions in fitness, driving the evolution of pre- and postcopulatory inbreeding avoidance mechanisms. There is now considerable evidence for such processes in females, but fewstudies have focused on males, particularly in the context of postcopulatory inbreeding avoidance. Here, we address this topic by exposing male guppies (Poecilia reticulata) to either full-sibling or unrelated females and determining whether they adjust investment in courtship and ejaculates. Our results revealed that males reduce their courtship but concomitantly exhibit short-term increases in ejaculate quality when paired with siblings. In conjunction with prior work reporting cryptic female preferences for unrelated sperm, our present findings reveal possible sexually antagonistic counter-adaptations that may offset postcopulatory inbreeding avoidance by females. © 2014 The Author(s)
Non 3-choosable bipartite graphs and the Fano plane
No full textIt is known that the smallest complete bipartite graph which is not 3-choosable has 14 vertices. We show that the extremal configuration is unique.PT: J; CR: BROWN E, 2002, MATH MAG, V75, P83 ERDOS P, 1979, CONGRESSUS NUMERANTI, V26, P155 FITZPATRICK SL, DMS854IR U VICT DEP HAUSON D, 1996, ARS COMBINATORIA, V44, P183 VIZING VG, 1976, DISKRET ANAL, V29, P3 WOODALL DR, 2001, LONDON MATH SOC LECT, V288, P269; NR: 6; TC: 0; J9: ARS COMB; PG: 15; GA: 948CQSource type: Electronic(1
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Protocol for the United Kingdom Rotator Cuff Study (UKUFF) : a randomised controlled trial of open and arthroscopic rotator cuff repair
No full textThis project was funded by the NIHR Health Technology Assessment programme (project number 05/47/02). J. L. Rees has received a grant from Oxford University which is related to this paper. J. Dawson reports that Oxford University has received a grant from HTA which is related to this paper, as well as a study grant.Peer reviewe
Book Review: Context: A Framework for its Influence on Evaluation Practice (New Directions for Evaluation, No. 135)
No full textBook review of: Context: A Framework for its Influence on Evaluation Practice (New Directions for Evaluation, No. 135), Debra J Rog, Jody L Fitzpatrick and Ross F Conner, Jossey-Bass, San Francisco and the American Evaluation Association, 2012, 111 pages, paperback, A39.99, 978-1-118-46328-4 (ISSN: 1097-6736 for printed subscription version
Are digital parties the future of party organization? A symposium on The Digital Party: Political Organisation and Online Democracy by Paolo Gerbaudo
No full textFluorescence suppression of 7-methoxycoumarin upon inclusion into cyclodextrins
No full textThe fluorescence intensity of 7- methoxycoumarin (7MC) in aqueous solution is found to significantly decrease upon addition of various cyclodextrins. This observed phenomenon is described as fluorescence suppression, to distinguish it from fluorescence reduction via bimolecular quenching. The decrease in fluorescence of 7MC is proposed to be the result of the formation of a host-guest inclusion complex with cyclodextrin. Since 7MC is a polarity-sensitive fluorophore, which is less fluorescent in a nonpolar environment, its fluorescence decreases upon inclusion into the relatively nonpolar internal cavity of the cyclodextrin. The same equation used for extracting the association constant in the case of 1:1 host-guest inclusion-induced fluorescence enhancement is shown to be applicable to the case of fluorescence suppression. In the case of beta-cyclodextrin, the degree of fluorescence suppression, as well as the value of the binding constant for formation of the inclusion complex, are found to be unaffected by modification of the cyclodextrin rims, suggesting that the molecule is completely included within the beta-cyclodextrin cavity. In the case of gamma-cyclodextrin, the degree of fluorescence suppression, but not the value of the binding constant, is found to be significantly affected by modification of the cyclodextrin rims, suggesting that the molecule is experiencing a less polar environment in the modified gamma-cyclodextrin cavity. The binding constant is three times larger in beta- as compared to gamma-cyclodextrin, indicating a much better size match in the smaller beta-cyclodextrin cavity.PT: J; CR: ACQUAVELLA MF, 1995, J CHEM SOC P2, P385 BENESI HA, 1949, J AM CHEM SOC, V71, P2703 DELAPENA AM, 1993, J INCLUS PHENOM MOL, V15, P131 EASTON CJ, 1999, MODIFIED CYCLODEXTRI ENCINAS MV, 1993, PHOTOCHEM PHOTOBIOL, V57, P603 FRAIJI EK, 1994, APPL SPECTROSC, V48, P79 FRANKE J, 1985, J INCLUSION PHENOM, V3, P471 FRANKEWICH RP, 1991, ANAL CHEM, V63, P2924 LIAO Y, 1996, J PHYS CHEM-US, V100, P734 LIU Y, 2001, BIOORG CHEM, V29, P19 MUTHURAMU K, 1984, J PHOTOCHEM, V26, P57 NELSON G, 1990, J PHYS CHEM-US, V94, P576 OANA M, 2002, J PHYS CHEM B, V106, P257 OKANO LT, 2001, J PHYS CHEM B, V105, P2122 PARK JW, 1997, CHEM LETT, P1043 REEUWIJK HJEM, 1993, J CHROMATOGR-BIOMED, V614, P95 SADLEJSOSNOWSKA N, 2001, J PHOTOCH PHOTOBIO A, V138, P35 SANRAME CN, 1996, J PHYS CHEM-US, V100, P8151 SARKAR B, 1995, B CHEM SOC JPN, V68, P1807 SCHUETTE JM, 1991, J PHYS CHEM-US, V95, P4897 SONG PS, 1970, J PHYS CHEM-US, V74, P4234 SZEJTLI J, 1998, CHEM REV, V98, P1743 WAGNER BD, 1998, J PHOTOCH PHOTOBIO A, V114, P151 WAGNER BD, 2000, J INCL PHENOM MACRO, V38, P471 WAGNER BD, 2003, HDB PHOTOCHEMISTRY P, V3, P1 YANG H, 1995, J PHOTOCH PHOTOBIO A, V86, P209 ZHANG XY, 2002, J AM CHEM SOC, V124, P254; NR: 27; TC: 1; J9: J INCL PHENOM MACROCYCL CHEM; PG: 6; GA: 762WZSource type: Electronic(1
On the covering dimension of the set of solutions of some nonlinear equations
No full textWe prove an abstract theorem whose sole hypothesis is that the degree of a certain map is nonzero and whose parametric equations are studied using cohomological mconclusions imply sharp, multidimensional continuation results. Applications are given to nonlinear partial differential equations
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