Results 11 to 20 of about 1,946 (184)

Implications of diet for the extinction of saber-toothed cats and American lions. [PDF]

open access: yesPLoS ONE, 2012
The saber-toothed cat, Smilodon fatalis, and American lion, Panthera atrox, were among the largest terrestrial carnivores that lived during the Pleistocene, going extinct along with other megafauna ∼12,000 years ago.
Larisa R G Desantis   +3 more
doaj   +1 more source

Controlled feeding experiments with juvenile alligators reveal microscopic dental wear texture patterns associated with hard-object feeding

open access: yesFrontiers in Ecology and Evolution, 2022
Dental wear analyses are classically applied to mammals because they have evolved heterodont dentitions for sophisticated mastication. Recently, several studies have shown a correlation between pre-assigned and analytically inferred diet preferences in ...
Daniela E. Winkler   +8 more
doaj   +1 more source

Dental microwear texture analysis of extant sika deer with considerations on inter-microscope variability and surface preparation protocols

open access: yesBiosurface and Biotribology, 2017
Recently, dental microwear texture analysis (DMTA) has been applied to various kinds of vertebrates to infer dietary preference. More data are needed on inter-microscope variability to assure the objectivity and repeatability of this method.
Mugino O. Kubo   +3 more
doaj   +1 more source

The effects of external Mn2+ concentration on hyphal morphology and citric acid production are mediated primarily by the NRAMP-family transporter DmtA in Aspergillus niger

open access: yesMicrobial Cell Factories, 2020
Background Citric acid, a commodity product of industrial biotechnology, is produced by fermentation of the filamentous fungus Aspergillus niger. A requirement for high-yield citric acid production is keeping the concentration of Mn2+ ions in the medium ...
Balázs Fejes   +10 more
doaj   +1 more source

Dietary ecology of the extinct cave bear: Evidence of omnivory as inferred from dental microwear textures [PDF]

open access: yesActa Palaeontologica Polonica, 2016
The diet of the extinct European cave bear, Ursus spelaeus, has widely been debated. Diverging from the extant brown bear (Ursus arctos) approximately 1.2 million years ago, the cave bear is one of the most ubiquitous fossil bears occurring in Europe ...
D. Brent Jones, Larisa R.G. DeSantis
doaj   +1 more source

Modelling Framework for Dynamic Multiclass Traffic Assignment in ITS Environment

open access: yesPromet (Zagreb), 2004
Deployment of flexible traffic control, pre-trip, on-trip,guidance and other ITS services require considerable researchtoward the development of appropriate methodological frameworkand tools.
Ivan Bošnjak   +2 more
doaj   +1 more source

DMTA studies of polymer blends and compatibility

open access: yesPolymer Testing, 1988
Abstract Some aspects of the testing of polymer blends by Dynamic Mechanical Thermal Analysis (DMTA) are reported. Compatibility of the blend components, which has a major influence on physical properties, can be well characterised. Data are presented for various types of blends, both compatible and incompatible.
R.E. Wetton, P.J. Corish
openaire   +1 more source

Beyond Simple Mimicry: Next‐Generation Geometric Architectures and Future Paradigms in Small‐Molecule and Macrocyclic Peptidomimetics

open access: yesAngewandte Chemie, EarlyView.
Peptide‐to‐Small Molecule Paradigm: Peptidomimetics have evolved from simple mimicry toward drug‐like scaffolds supported by increasing clinical successes. This Perspective highlights the geometric design principles—linear repetition, convergent fusion, and cyclization—defining the next‐generation peptidomimetic architectures capable of targeting ...
Jesang Lee   +5 more
wiley   +2 more sources

Dynamic Mechanical Freezing Points of Cosmetic O/W Emulsions and Their Stability at Low Temperatures

open access: yesApplied Rheology, 2000
To develop cosmetic products quickly and effectively, developers need reliable test methods for evaluating product stability. Phenomena that determine the stability of cosmetic emulsions include phase transitions taking place in the relevant application ...
Hetzel Frank   +3 more
doaj   +1 more source

Spontaneous Long‐Range Order and Alignment in Phase‐Separated Dynamic Covalent Networks Using Discrete Siloxanes

open access: yesAngewandte Chemie, EarlyView.
Spontaneously aligned, long‐range hexagonal columnar ordering is obtained in phase‐separated dynamic covalent networks by combining discrete siloxanes and dynamic acylsemicarbazide bonds. The ordered network shows improved (thermo)mechanical properties and creep resistance compared to the disordered network.
Stefan J. D. Maessen   +6 more
wiley   +2 more sources

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