Search Results - (Author, Cooperation:C. Holzapfel)
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1Latest Papers from Table of Contents or Articles in PressC. A. Rietveld ; S. E. Medland ; J. Derringer ; J. Yang ; T. Esko ; N. W. Martin ; H. J. Westra ; K. Shakhbazov ; A. Abdellaoui ; A. Agrawal ; E. Albrecht ; B. Z. Alizadeh ; N. Amin ; J. Barnard ; S. E. Baumeister ; K. S. Benke ; L. F. Bielak ; J. A. Boatman ; P. A. Boyle ; G. Davies ; C. de Leeuw ; N. Eklund ; D. S. Evans ; R. Ferhmann ; K. Fischer ; C. Gieger ; H. K. Gjessing ; S. Hagg ; J. R. Harris ; C. Hayward ; C. Holzapfel ; C. A. Ibrahim-Verbaas ; E. Ingelsson ; B. Jacobsson ; P. K. Joshi ; A. Jugessur ; M. Kaakinen ; S. Kanoni ; J. Karjalainen ; I. Kolcic ; K. Kristiansson ; Z. Kutalik ; J. Lahti ; S. H. Lee ; P. Lin ; P. A. Lind ; Y. Liu ; K. Lohman ; M. Loitfelder ; G. McMahon ; P. M. Vidal ; O. Meirelles ; L. Milani ; R. Myhre ; M. L. Nuotio ; C. J. Oldmeadow ; K. E. Petrovic ; W. J. Peyrot ; O. Polasek ; L. Quaye ; E. Reinmaa ; J. P. Rice ; T. S. Rizzi ; H. Schmidt ; R. Schmidt ; A. V. Smith ; J. A. Smith ; T. Tanaka ; A. Terracciano ; M. J. van der Loos ; V. Vitart ; H. Volzke ; J. Wellmann ; L. Yu ; W. Zhao ; J. Allik ; J. R. Attia ; S. Bandinelli ; F. Bastardot ; J. Beauchamp ; D. A. Bennett ; K. Berger ; L. J. Bierut ; D. I. Boomsma ; U. Bultmann ; H. Campbell ; C. F. Chabris ; L. Cherkas ; M. K. Chung ; F. Cucca ; M. de Andrade ; P. L. De Jager ; J. E. De Neve ; I. J. Deary ; G. V. Dedoussis ; P. Deloukas ; M. Dimitriou ; G. Eiriksdottir ; M. F. Elderson ; J. G. Eriksson ; D. M. Evans ; J. D. Faul ; L. Ferrucci ; M. E. Garcia ; H. Gronberg ; V. Guethnason ; P. Hall ; J. M. Harris ; T. B. Harris ; N. D. Hastie ; A. C. Heath ; D. G. Hernandez ; W. Hoffmann ; A. Hofman ; R. Holle ; E. G. Holliday ; J. J. Hottenga ; W. G. Iacono ; T. Illig ; M. R. Jarvelin ; M. Kahonen ; J. Kaprio ; R. M. Kirkpatrick ; M. Kowgier ; A. Latvala ; L. J. Launer ; D. A. Lawlor ; T. Lehtimaki ; J. Li ; P. Lichtenstein ; P. Lichtner ; D. C. Liewald ; P. A. Madden ; P. K. Magnusson ; T. E. Makinen ; M. Masala ; M. McGue ; A. Metspalu ; A. Mielck ; M. B. Miller ; G. W. Montgomery ; S. Mukherjee ; D. R. Nyholt ; B. A. Oostra ; L. J. Palmer ; A. Palotie ; B. W. Penninx ; M. Perola ; P. A. Peyser ; M. Preisig ; K. Raikkonen ; O. T. Raitakari ; A. Realo ; S. M. Ring ; S. Ripatti ; F. Rivadeneira ; I. Rudan ; A. Rustichini ; V. Salomaa ; A. P. Sarin ; D. Schlessinger ; R. J. Scott ; H. Snieder ; B. St Pourcain ; J. M. Starr ; J. H. Sul ; I. Surakka ; R. Svento ; A. Teumer ; H. Tiemeier ; F. J. van Rooij ; D. R. Van Wagoner ; E. Vartiainen ; J. Viikari ; P. Vollenweider ; J. M. Vonk ; G. Waeber ; D. R. Weir ; H. E. Wichmann ; E. Widen ; G. Willemsen ; J. F. Wilson ; A. F. Wright ; D. Conley ; G. Davey-Smith ; L. Franke ; P. J. Groenen ; M. Johannesson ; S. L. Kardia ; R. F. Krueger ; D. Laibson ; N. G. Martin ; M. N. Meyer ; D. Posthuma ; A. R. Thurik ; N. J. Timpson ; A. G. Uitterlinden ; C. M. van Duijn ; P. M. Visscher ; D. J. Benjamin ; D. Cesarini ; P. D. Koellinger
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-06-01Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Cognition ; *Educational Status ; Endophenotypes ; Female ; Genetic Loci ; *Genome-Wide Association Study ; Humans ; Male ; Multifactorial Inheritance ; *Polymorphism, Single NucleotidePublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 0005-2728Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyMedicinePhysicsType of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 0039-6028Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 1572-8854Source: Springer Online Journal Archives 1860-2000Topics: GeosciencesPhysicsNotes: Abstract Structural information, obtained from crystal structures and NMR investigations, on the range of 3-cyanohexahydronaphth-[2,3-e]-1,2-oxazines obtained from the cycloaddition reactions ofN-cyclohexyl-N-propenylnitrosonium ions with 5-substituted 1,4-dihydronaphthalenes, are compared. The crystal structure of 6-chloro-3α-cyano-2-cyclohexyl-4α-methyl-1aα,3,4,4aα,5,10-hexahydronaphth-[2,3-e]-1,2-oxazine, an example of one of three types of stereoisomeric cyanide adducts, is reported. This compound, C20H25N2OCl,M r=344.88, crystallizes in the monoclinic space groupP21/n unit-cell dimensionsa=27.823(8),b=2.338(9),c=5.238(7) Å,β=90.33(5)°;V c=1798.1 Å3,Z=4,D x=1.248 g cm−3,μ(CuKα)=18.35 cm−1. The finalR was 0.052 for 1837 unique reflections withI〉2σ(I). The analysis confirms that the oxazine rings of all three types of stereoisomers assume distorted chair conformations in the solid state, with theN-cyclohexyl groups equatorial and the cyano groups axial. The endocyclic torsion angles about the C(1A)-O(1) and O(1)-N(2) bonds, −64.6(3) and 71.9(3)° respectively, are still relatively large, but smaller than in the case of the other stereoisomers. An analysis of the1H NMR spectra of a number of these naphthoxazines, representative of all three types of stereoisomers, indicates that their conformations in solution are similar to those which prevail in the solid state.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1572-8854Source: Springer Online Journal Archives 1860-2000Topics: GeosciencesPhysicsNotes: Abstract The crystal structure of copper bis(tenuazonate) monohydrate has been determined by X-ray diffraction from 968 counter-measured intensities. The thin flat crystals are monoclinic,P21, witha = 13.77(1),b = 15.51(1),c = 11.14(1) Å, β = 109.5(2) °, and two formula units, C20H26CuN2O6·H2O, per asymmetric unit. The structure was refined by full-matrix least squares toR = 0.056. Because of the dimerization one copper ion is four- and the other five-coordinate. The dimers are hydrogenbonded into sheets by water molecules.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 0040-6090Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Key words Evolution ; Phenology ; Circadian ; Biogeography ; DiapauseSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Photoperiodic time measurement regulating larval diapause in the pitcher-plant mosquito, Wyeomyia smithii, varies in a close relationship with latitude. The critical photoperiod mediating the maintenance and termination of diapause is positively correlated with latitude (r 2 = 0.977) among six populations from southern (30–31° N), intermediate (40° N), and northern (46–49° N) latitudes in North America. The developmental response to unnaturally short and to unnaturally long photoperiods declines with increasing latitude, so that longer critical photoperiods are associated with a downward rather than a lateral shift in the photoperiodic response curve. Exotic light and dark cycles of varying period (T) with a short (10 h) photophase and a scotophase ranging from 14 (T = 24) to 62 (T = 72) h, reveal two geographic patterns: a decline in perturbability of the photoperiodic clock with increasing latitude, and no change with latitude in the 21-h period of rising and falling development with increasing T. These results show (1) that there is a rhythmic component to photoperiodic time measurement in W. smithii, (2) that the period of this rhythm is about 21 h in all populations, and (3) that more northern populations show decreasing responsiveness to photoperiod and increasing stability against perturbation by exotic period lengths (T 〉 24). Previous studies on W.␣smithii indicate that this single temperate species of a tropical and subtropical genus has evolved from south to north. We therefore conclude that the evolution of increasing critical photoperiod in W. smithii during its adaptive radiation into North America has more likely involved the amplitude and not the period of the underlying circadian pacemaker.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Key words Photoperiodism ; Circadian rhythms Evolution ; Diapause ; LatitudeSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract The mosquito, Wyeomyia smithii, enters a larval dormancy or diapause that is initiated, maintained, and terminated by photoperiod. The median or critical photoperiod regulating diapause increases from 12 h of light per day along the Gulf of Mexico, USA (30° N), to over 15 h in southern Canada (49° N). Photoperiodic time measurement in W. smithii comprises both rhythmic and hourglass (interval timer) components. Using interrupted-night and resonance experiments, we show that both the rhythmic and hourglass components are prominent in the southern (ancestral) populations and that the influence of the rhythmic component declines with increasing latitude, while the hourglass component remains strong in northern (derived) populations. Previously, it has been shown that the genetic differences in critical photoperiod between northern populations and their southern ancestors involve not only the additive (independent) effects of genes, but also gene-gene interaction (epistasis). We therefore conclude that adaptive evolution of W. smithii has probably involved the progressive epistatic masking of the ancestral rhythmic component resulting in photoperiodic time measurement in northern populations accomplished principally through a day-interval timer. A comparison of W. smithii with previous studies indicates that the decline in critical photoperiod with increasing latitude represents an overall decrease in response to light rather than a shift in the timing of photosensitivity among arthropods in general. We propose that the underlying functional components of photoperiodic time measurement, as well as the overt photoperiodic response, are either homologous or are themselves responding directly to selection over latitudinal gradients in seasonality.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Competition ; Predation ; Disturbance ; StabilitySource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary In southeastern North America (North Florida, USA), the duration, frequency, and timing of drought differentially affect the survivorship of pre-adult tree-hole mosquitoes. Drought affects survivorship both by the direct action of dehydration on developing larvae and pupae and by the indirect modulation of predation. The drought-susceptible species, Toxorhynchites rutilus, Orthopodomyia signifera, and Anopheles barberi co-occur in more permanent holes that are larger, with larger, more vertical openings, lower down in larger trees, and contain darker water with higher conductivity, pH, and tannin-lignin content than the holes occupied by Aedes triseriatus that has drought-resistant eggs and rapid larval development. Ovipositing mosquitoes cue on physical and chemical attributes of tree holes independently of host tree species. These same attributes differ among drought-prone and drought-resistant holes but mosquitoes track these attributes more faithfully than the attributes predict tree-hole stability.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1432-1424Keywords: cell rotation ; polarization ; protoplasts ; dielectric breakdownSource: Springer Online Journal Archives 1860-2000Topics: BiologyChemistry and PharmacologyNotes: Summary Protoplasts ofAvena sativa rotate in an alternating electric field provided that at least two cells are located close to each other. An optimum frequency range (20 to 30 kHz) exists where rotation of all cells exposed to the field is observed. Below and above this frequency range, rotation of some cells is only occasionally observed. The angular velocity of rotation depends on the square of the electric field strength. At field strengths above the value leading to electrical breakdown of the cell membrane, rotation is no longer observed due to deterioration of the cells. The absolute value of the angular velocity of rotation at a given field strength depends on the arrangement of the cells in the electric field. A maximum value is obtained if the angle between the field direction and the line connecting the two cells is 45o. With increasing distance between the two cells the rotation speed decreases. Furthermore, if two cells of different radii are positioned close to each other the cell with the smaller radius will rotate with a higher speed than the larger one. Rotation of cells in an alternating electric field is described theoretically by interaction between induced dipoles is adjacent cells. The optimum frequency range for rotation is related to the relaxation of the polarization process in the cell. The quadratic dependence of the angular velocity of rotation on the field strength results from the fact that the torque is the product of the external field and the induced dipole moment which is itself proportional to the external field. The theoretical and experimental results may be relevant for cyclosis (rotational streaming of cytoplasm) in living cells.Type of Medium: Electronic ResourceURL: