Results 21 to 30 of about 7,337 (162)

Fruit scent and observer colour vision shape food-selection strategies in wild capuchin monkeys [PDF]

, 2019
The senses play critical roles in helping animals evaluate foods, including fruits that can change both in colour and scent during ripening to attract frugivores.
Endo, Mizuki, Garrett, Eva C., Kawamura, Shoji, Matsushita, Yuka, Melin, Amanda D., Nevo, Omer, Sakurai, Kodama, Shirasu, Mika, Touhara, Kazushige, Williamson, Rachel E.   +9 more
core   +1 more source

Chromatic roots are dense in the whole complex plane [PDF]

, 2000
I show that the zeros of the chromatic polynomials P_G(q) for the generalized theta graphs \Theta^{(s,p)} are, taken together, dense in the whole complex plane with the possible exception of the disc |q-1| < 1.
Sokal, Alan D.
core   +3 more sources

Retinal aging in the diurnal Chilean rodent (Octodon degus): histological, ultrastructural and neurochemical alterations of the vertical information processing pathway

Frontiers in Cellular Neuroscience, 2015
The retina is sensitive to age-dependent degeneration. To find suitable animal models to understand and map this process has particular importance. The degu (Octodon degus) is a diurnal rodent with dichromatic color vision.
Krisztina eSzabadfi, Cristina eEstrada, Emiliano eFernandez-Villalba, Ernesto eTarragon, Gyorgy eSetalo, Virginia eIzura, Dora eReglodi, Andrea eTamas, Robert eGabriel, Maria Trinidad eHerrero   +9 more
doaj   +1 more source

Tutte's dichromate for signed graphs

, 2020
We introduce the ``trivariate Tutte polynomial" of a signed graph as an invariant of signed graphs up to vertex switching that contains among its evaluations the number of proper colorings and the number of nowhere-zero flows.
Goodall, Andrew, Litjens, Bart, Regts, Guus, Vena, Lluis   +3 more
core   +1 more source

Acyclic edge coloring of graphs [PDF]

, 2014
An {\em acyclic edge coloring} of a graph $G$ is a proper edge coloring such that the subgraph induced by any two color classes is a linear forest (an acyclic graph with maximum degree at most two). The {\em acyclic chromatic index} $\chiup_{a}'(G)$ of a
Wang, Tao, Zhang, Yaqiong
core   +1 more source

Comparison of the Chinese bamboo partridge and red Junglefowl genome sequences highlights the importance of demography in genome evolution

BMC Genomics, 2018
Background Recent large-scale whole genome sequencing efforts in birds have elucidated broad patterns of avian phylogeny and genome evolution. However, despite the great interest in economically important phasianids like Gallus gallus (Red Junglefowl ...
G. P. Tiley, R. T. Kimball, E. L. Braun, J. G. Burleigh   +3 more
doaj   +1 more source

Dichromatic polynomials and Potts models summed over rooted maps

, 2001
We consider the sum of dichromatic polynomials over non-separable rooted planar maps, an interesting special case of which is the enumeration of such maps. We present some known results and derive new ones.
Arakaki, Bellon, Bertran, Bevilacqua, Blanco, Blanco, Contini, Cubeddu, Dam, Delfino, Delwiche, Eustaquio, Evans, Gallignani, Gratton, Grosenick, J.G. Walker, K.I. Hopcraft, Kienle, Kohl, Lin, Marquet, Martelli, Matcher, Nichols, Rambla, S.F. Baker, Schweiger, Smith, Tamura, Tromberg, Wilson   +31 more
core   +1 more source

Enhanced Dichroic Coloration Through Void‐Particle Induced Interference in Randomly Distributed Cu2O Octahedrons on Glass Substrate

Laser &Photonics Reviews, EarlyView.
In randomly distributed Cu2O octahedron particles on a glass substrate, the absence of particles in certain areas generates a distinct “void‐particle induced interference” phenomenon. This effect results in notable reflection and transmission dichroism, characterized by two reflection peaks within the visible spectrum, but only a single transmission ...
Yaqun Han, Mohammad Ali, Lingyue Zhu, Shufen Zhang, L. Jay Guo, Suli Wu   +5 more
wiley   +1 more source

Optical Lattice Trap for Kerr Solitons

, 2017
We show theoretically and numerically that dichromatic pumping of a nonlinear microresonator by two continuous wave coherent optical pumps creates an optical lattice trap that results in the localization of intra-cavity Kerr solitons with soliton ...
Maleki, Lute, Matsko, Andrey B., Taheri, Hossein   +2 more
core   +1 more source

Colours of urban selection: carotenoid‐based signals reveal divergent urban/rural evolutionary trajectories in two closely related passerines

Oikos, EarlyView.
Urbanisation is a major driver of environmental change, reshaping ecological and evolutionary processes. Urban‐driven phenotypic differences are increasingly documented, but the underlying role of selection is still understudied. One pattern is the consistent reduction of carotenoid‐based plumage pigmentation in city birds.
Nicolas Bekka, Simon Agostini, Samuel Perret, Clotilde Biard   +3 more
wiley   +1 more source