Results 31 to 40 of about 41,973 (193)

Ecuadorian Glass Frogs: Current state of knowledge, new research trends and conservation [PDF]

, 2016
Ecuador has the biggest number of amphibian species per unit of area in the world (427 species in 276,840 km2). Glass frogs (Centrolenidae), with 30 species, constitute 7.06 % of the Ecuadorian anurans. However, the current state of knowledge of this family in Ecuador is still very basic.
Cisneros-Heredia, Diego F, McDiarmid, Roy W.   +1 more
openaire   +1 more source

The Influence of Signaling Conspecific and Heterospecific Neighbors on Eavesdropper Pressure [PDF]

, 2019
The study of tradeoffs between the attraction of mates and the attraction of eavesdropping predators and parasites has generally focused on a single species of prey, signaling in isolation.
Benson, Christopher S., Caldwell, Michael S., Lam, Tiffany L., Logue, David M., Pickering, Oliver H., Trillo, Paula A.   +5 more
core   +2 more sources

Low reproductive skew despite high male-biased operational sex ratio in a glass frog with paternal care [PDF]

BMC Evolutionary Biology, 2015
AbstractBackgroundReproductive skew, the uneven distribution of reproductive success among individuals, is a common feature of many animal populations. Several scenarios have been proposed to favour either high or low levels of reproductive skew. Particularly a male-biased operational sex ratio and the asynchronous arrival of females is expected to ...
Mangold, Alexandra, Trenkwalder, Katharina, Ringler, Max, Hödl, Walter, Ringler, Eva   +4 more
openaire   +2 more sources

Selective Separation of the Rare Earth Elements Dysprosium and Neodymium via Tailoring Nanocellulose Chemical Structure

Advanced Functional Materials, EarlyView.
Dicarboxylate‐modified anionic hairy cellulose nanocrystals exhibit a high selectivity for dysprosium(III) over neodymium(III). This selectivity arises from disordered dicarboxylate cellulose “hairs” that enable cooperative ionic coordination, hydrogen bonding, and strain‐induced conformational shrinkage.
Roya Koshani, Shang‐Lin Yeh, Karuna Anna Sajeevan, Mica L. Pitcher, Dawson Alexander, Ratul Chowdhury, Amir Sheikhi   +6 more
wiley   +1 more source

Anti‐Slip Material‐Based Strategies and Approaches

Advanced Materials Technologies, EarlyView.
This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani, Carlo Antonini, Teresa Gatti, Mengjiao Wang   +3 more
wiley   +1 more source

Influence of environmental factors and body condition on the post-oviposition behavior in the emerald glass frog Espadarana prosoblepon (Centrolenidae)

PeerJ, 2022
In species with parental care behaviors, parents may adjust the intensity and duration of their care if fluctuation in factors such as environmental variables or body condition affects offspring survival. In the face of environmental changes, many egg-laying species remain with their clutch for extended periods if this behavioral adjustment provides ...
Johana Goyes Vallejos, Abner D. Hernández-Figueroa   +1 more
openaire   +3 more sources

Cross‐Phase Modulation via Time‐Varying Epsilon‐Near‐Zero Metasurfaces

Advanced Optical Materials, EarlyView.
Time‐varying epsilon‐near‐zero metasurfaces are shown to enable cross‐phase modulation beyond conventional ENZ excitation. By engineering dual absorption bands and exploiting oblique ultrafast pumping, large and broadband frequency translations are achieved at low pump energies.
Rakesh Dhama, Md Imran Hossain, Jesse Pietila, Thomas Fordell, Humeyra Caglayan   +4 more
wiley   +1 more source

Phenology and mortality of embryos in a Colombian population of Nymphargus grandisonae (Anura: Centrolenidae)

Phyllomedusa: Journal of Herpetology, 2020
Phenology and mortality of embryos in a Colombian population of Nymphargus grandisonae (Anura: Centrolenidae). Studies of phenology and natural history of anurans provide information useful for its conservation.
Daniela Villegas-Mora, Sebastian Muñoz-Acevedo, Estefany Caroline Guevara-Molina, Fernando Vargas-Salinas   +3 more
doaj  

Tempo and mode of performance evolution across multiple independent origins of adhesive toe pads in lizards [PDF]

, 2017
Understanding macroevolutionary dynamics of trait evolution is an important endeavor in evolutionary biology. Ecological opportunity can liberate a trait as it diversifies through trait space, while genetic and selective constraints can limit ...
Austin C. C., Burnham K. P., Eastman J. M., Haacke W., Harmon L. J., Higham T. E., Maderson P., Moen D. S., Peattie A. M., Peterson J. A., Peterson J. A., Russell A. P., Sadlier R. A., Stewart G. R., Title P. O., Vucko M. J., Wainwright P. C., Wilson S.   +17 more
core   +3 more sources

Photobleaching through glass micropipettes: sodium channels without lateral mobility in the sarcolemma of frog skeletal muscle. [PDF]

Proceedings of the National Academy of Sciences, 1982
Sodium currents were recorded from frog skeletal muscle by using fire-polished micropipettes to electrically isolate and voltage clamp a small patch of sarcolemma. Sodium current amplitude served as an assay for the number of functional sodium channels in the patch. With the pipette as a light guide, these channels were irradiated with ultraviolet (UV)
W, Stühmer, W, Almers
openaire   +2 more sources