Search Results - (Author, Cooperation:C. Dave)
-
1Latest Papers from Table of Contents or Articles in PressW. F. Laurance ; D. C. Useche ; J. Rendeiro ; M. Kalka ; C. J. Bradshaw ; S. P. Sloan ; S. G. Laurance ; M. Campbell ; K. Abernethy ; P. Alvarez ; V. Arroyo-Rodriguez ; P. Ashton ; J. Benitez-Malvido ; A. Blom ; K. S. Bobo ; C. H. Cannon ; M. Cao ; R. Carroll ; C. Chapman ; R. Coates ; M. Cords ; F. Danielsen ; B. De Dijn ; E. Dinerstein ; M. A. Donnelly ; D. Edwards ; F. Edwards ; N. Farwig ; P. Fashing ; P. M. Forget ; M. Foster ; G. Gale ; D. Harris ; R. Harrison ; J. Hart ; S. Karpanty ; W. J. Kress ; J. Krishnaswamy ; W. Logsdon ; J. Lovett ; W. Magnusson ; F. Maisels ; A. R. Marshall ; D. McClearn ; D. Mudappa ; M. R. Nielsen ; R. Pearson ; N. Pitman ; J. van der Ploeg ; A. Plumptre ; J. Poulsen ; M. Quesada ; H. Rainey ; D. Robinson ; C. Roetgers ; F. Rovero ; F. Scatena ; C. Schulze ; D. Sheil ; T. Struhsaker ; J. Terborgh ; D. Thomas ; R. Timm ; J. N. Urbina-Cardona ; K. Vasudevan ; S. J. Wright ; G. J. Arias ; L. Arroyo ; M. Ashton ; P. Auzel ; D. Babaasa ; F. Babweteera ; P. Baker ; O. Banki ; M. Bass ; I. Bila-Isia ; S. Blake ; W. Brockelman ; N. Brokaw ; C. A. Bruhl ; S. Bunyavejchewin ; J. T. Chao ; J. Chave ; R. Chellam ; C. J. Clark ; J. Clavijo ; R. Congdon ; R. Corlett ; H. S. Dattaraja ; C. Dave ; G. Davies ; M. Beisiegel Bde ; N. da Silva Rde ; A. Di Fiore ; A. Diesmos ; R. Dirzo ; D. Doran-Sheehy ; M. Eaton ; L. Emmons ; A. Estrada ; C. Ewango ; L. Fedigan ; F. Feer ; B. Fruth ; J. G. Willis ; U. Goodale ; S. Goodman ; J. C. Guix ; P. Guthiga ; W. Haber ; K. Hamer ; I. Herbinger ; J. Hill ; Z. Huang ; I. F. Sun ; K. Ickes ; A. Itoh ; N. Ivanauskas ; B. Jackes ; J. Janovec ; D. Janzen ; M. Jiangming ; C. Jin ; T. Jones ; H. Justiniano ; E. Kalko ; A. Kasangaki ; T. Killeen ; H. B. King ; E. Klop ; C. Knott ; I. Kone ; E. Kudavidanage ; J. L. Ribeiro ; J. Lattke ; R. Laval ; R. Lawton ; M. Leal ; M. Leighton ; M. Lentino ; C. Leonel ; J. Lindsell ; L. Ling-Ling ; K. E. Linsenmair ; E. Losos ; A. Lugo ; J. Lwanga ; A. L. Mack ; M. Martins ; W. S. McGraw ; R. McNab ; L. Montag ; J. M. Thompson ; J. Nabe-Nielsen ; M. Nakagawa ; S. Nepal ; M. Norconk ; V. Novotny ; S. O'Donnell ; M. Opiang ; P. Ouboter ; K. Parker ; N. Parthasarathy ; K. Pisciotta ; D. Prawiradilaga ; C. Pringle ; S. Rajathurai ; U. Reichard ; G. Reinartz ; K. Renton ; G. Reynolds ; V. Reynolds ; E. Riley ; M. O. Rodel ; J. Rothman ; P. Round ; S. Sakai ; T. Sanaiotti ; T. Savini ; G. Schaab ; J. Seidensticker ; A. Siaka ; M. R. Silman ; T. B. Smith ; S. S. de Almeida ; N. Sodhi ; C. Stanford ; K. Stewart ; E. Stokes ; K. E. Stoner ; R. Sukumar ; M. Surbeck ; M. Tobler ; T. Tscharntke ; A. Turkalo ; G. Umapathy ; M. van Weerd ; J. V. Rivera ; M. Venkataraman ; L. Venn ; C. Verea ; C. V. de Castilho ; M. Waltert ; B. Wang ; D. Watts ; W. Weber ; P. West ; D. Whitacre ; K. Whitney ; D. Wilkie ; S. Williams ; D. D. Wright ; P. Wright ; L. Xiankai ; P. Yonzon ; F. Zamzani
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-07-27Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Agriculture/statistics & numerical data ; Animals ; *Biodiversity ; Conservation of Natural Resources/*statistics & numerical data ; Data Collection ; Ecology/statistics & numerical data ; Endangered Species/*statistics & numerical data ; Environmental Pollution/adverse effects/statistics & numerical data ; Fires/statistics & numerical data ; Forestry/statistics & numerical data ; Interviews as Topic ; Mining/statistics & numerical data ; Population Growth ; Rain ; Reproducibility of Results ; Research Personnel ; Surveys and Questionnaires ; Temperature ; Trees/*physiology ; *Tropical ClimatePublished by: -
2Latest Papers from Table of Contents or Articles in PressMc; Donough, C. W., Magvanjav, O., Sa, A. C. C., El Rouby, N. M., Dave, C., Deitchman, A. N., Kawaguchi-Suzuki, M., Mei, W., Shen, Y., Singh, R. S. P., Solayman, M., Bailey, K. R., Boerwinkle, E., Chapman, A. B., Gums, J. G., Webb, A., Scherer, S. E., Sadee, W., Turner, S. T., Cooper-De; Hoff, R. M., Gong, Y., Johnson, J. A.
American Heart Association (AHA)
Published 2018Staff ViewPublication Date: 2018-04-13Publisher: American Heart Association (AHA)Print ISSN: 1942-325XElectronic ISSN: 1942-3268Topics: MedicineKeywords: Genetic, Association Studies, High Blood Pressure, Hypertension, PharmacologyPublished by: -
3Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-07-27Publisher: MDPI PublishingElectronic ISSN: 2076-3263Topics: GeosciencesPublished by: -
4Articles: DFG German National LicensesMcGrother, Simon C. ; Williamson, Dave C. ; Jackson, George
College Park, Md. : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The phase transitions exhibited by systems of hard spherocylinders, with a diameter D and cylinder length L, are re-examined with the isothermal–isobaric Monte Carlo (MC-NPT) simulation technique. For sufficiently large aspect ratios (L/D) the system is known to form liquid crystalline phases: isotropic (I), nematic (N), smectic-A (Sm A), and solid (K) phases are observed with increasing density. There has been some debate about the first stable liquid crystalline phase to appear as the aspect ratio is increased from the hard-sphere limit. We show that the smectic-A phase becomes stable before the nematic phase as the anisotropy is increased. There is a transition directly from the isotropic to the smectic-A phase for the system with L/D=3.2. For larger aspect ratios, e.g., L/D=4, the smectic-A phase is preceded by a nematic phase. This means that the hard spherocylinder system exhibits I–Sm A–K and I–N–Sm A triple points, the latter occurring at a larger aspect ratio. We also confirm the simulation results of Frenkel [J. Phys. Chem. 92, 3280 (1988)] for the system with L/D=5, which exhibits isotropic, nematic, smectic-A, and solid phases. All of the phase transitions are accompanied by a discontinuous jump in the density, and are, therefore, first order. In the light of these new simulation results, we re-examine the adequacy of the Parsons [Phys. Rev. A 19, 1225 (1979)] scaling approach to the theory of Onsager for the I–N phase transition. It is gratifying to note that this simple approach gives an excellent representation of both the isotropic and nematic branches, and gives accurate densities and pressures for the I–N phase transition. As expected for such a theory, the corresponding orientational distribution function is not accurately reproduced at the phase transition. The results of the recent Onsager/DFT theory of Esposito and Evans [Mol. Phys. 83, 835 (1994)] for the N–Sm A bifurcation point are also in agreement with the simulation data. It is hoped that our simulation results will be used for comparisons with systems with more complex interactions, e.g., dipolar hard spherocylinders and hard spherocylinders with attractive sites. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The isotropic–nematic phase transition in a fluid of hard spherocylinders with a spherocylindrical square-well attraction is examined using Monte Carlo simulations and two theoretical approaches. The first theory is a first-order perturbation theory which incorporates the Parsons decoupling approximation for the pair distribution function. The second theory is a simple resummation of the virial coefficients in the nematic phase which maps the thermodynamics of the nematic phase to those of the isotropic phase. In general both the theoretical approaches and the simulation results show a destabilization of the nematic phase with respect to the isotropic phase as the temperature is decreased. However, close comparison between the simulation results and the theories reveals that the Parsons approach is quantitatively deficient. On the other hand, the results for the resummation procedure are in good agreement with the simulation results over the full isotropic range and for the isotropic–nematic phase transition. The comparison of the nematic phase close to the phase transition shows reasonable agreement between theory and simulation, however, the theoretical results become much poorer deep in the nematic phase. The reason for this is attributed to the crude manner in which the orientational dependence is included into the attractive contribution to the free energy. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: A study of the liquid crystalline phase transitions in a system of hard-sphere chains is presented. The chains comprise m=7 tangentially bonded hard-sphere segments in a linear conformation (LHSC). The isothermal–isobaric Monte Carlo simulation technique is used to obtain the equation of state of the system both by compressing the isotropic (I) liquid and by expanding the solid (K). As well as the usual isotropic and solid phases, nematic and smectic-A liquid crystalline states are seen. A large degree of hysteresis is found in the neighborhood of the I–N transition. The results for the rigid LHSC system were compared with existing data for the corresponding semiflexible hard-sphere chains (FHSC): the flexibility has a large destabilizing effect on the nematic phase and consequently it postpones the I–N transition. The results of the simulations are also compared with rescaled Onsager theories for the I–N transition. It is rather surprising to find that the Parsons approach, which has been so successful for other hard-core models such as spherocylinders and ellipsoids, gives very poor results. The related approach of Vega and Lago gives a good description of the I–N phase transition. The procedure of Vega and Lago, as with all two-body resummations of the Onsager theory, only gives a qualitative description of the nematic order. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: A thermodynamic perturbation theory in the high temperature expansion is presented for a system of hard spherocylinders with a permanent longitudinal dipole positioned at the center of the molecule. The free energy of the reference hard spherocylinder is described using an expression derived by Lee [J. Chem. Phys. 80, 7036 (1988)]. The dipole contribution to the free energy is evaluated using a generalization to the perturbation theory for dipolar hard spheres proposed by Larsen, Rasaiah, and Stell [Mol. Phys. 33, 987 (1977)]. The effect of increasing dipole strength on the isotropic-nematic phase transition of a fluid of spherocylinders of aspect ratio, L/D=5, is studied using a generalization to the well known Onsager theory [Ann. N. Y. Acad. Sci. 51, 627 (1949)]. The single particle orientational distribution function is approximated with a gaussian trial function while an ad hoc approximation is used for the pair and triplet correlation functions of the hard spherocylinder reference system. While these approximations seem quite severe they are not expected to affect the general features of the phase diagram. Increasing the dipole moment is found to destabilize the nematic phase with respect to the isotropic phase, shifting the phase transition to higher densities and pressures. This is in general agreement with the most recent simulation studies of the system. All other theories of this system predict a stabilization of nematic phase. It is suggested that the reason for the failure of these theories lies in the two body character of their approach to the orientational order in the liquid crystal phase. To the knowledge of the authors this is the first theory for the isotropic-nematic phase transition of dipolar hard-spherocylinders which explicitly includes three-body interactions in the orientationally ordered phase. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesCHANG, K.-P. ; STEIGER, R. F. ; DAVE, C. ; CHENG, Y.-C.
Oxford, UK : Blackwell Publishing Ltd
Published 1978Staff ViewISSN: 1550-7408Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyNotes: SYNOPSIS. Methylglyoxal bis(guanylhydrazone) (MGBG) at 0.5 mm had little effect in vitro on Blastocrithidia culicis, Crithidia oncopelti, and Leishmania spp., but completely inhibited growth of Trypanosoma brucei. Inhibition became irreversible after a 3-h exposure of T. brucei culture procyclics. Treated organisms remained motile, but failed to divide. Polyamines, spermidine, and spermine, did not reverse the anti-trypanosome action of MGBG (preloading of cells or concurrent administration). Two intraperitoneal injections of the drug at a concentration of 50 mg kg body weight at a 1-day interval greatly reduced the parasitemia of T. brucei and T. congolense in rats. Trypanosome infections, however, relapsed and killed the animals in 6 days after treatment. It was evident from the results of tracer experiments with T. brucei that MGBG significantly lowered incorporation of [3H]thymidine by culture procyclics and of [3H]uridine by bloodstream forms; in both stages [3H]leucine incorporation was only slightly inhibited. It is suggested that MGBG interferes with nucleoside incorporation by Trypanosoma and that its mode of action is different in bloodstream and culture procyclics.Type of Medium: Electronic ResourceURL: