Results 71 to 80 of about 3,644 (285)

In‐vitro puncture experiment using alligator teeth tracks the formation of dental microwear and its association with hardness of the diet

open access: yesThe Anatomical Record, EarlyView.
Abstract With the development of dental microwear texture analysis (DMTA), there has been an increasing application of DMTA for dietary estimation in extant and fossil reptiles, including dinosaurs. While numerous feeding experiments exist for herbivorous mammals, knowledge remains limited for carnivorous reptiles. This study aimed to qualitatively and
K. Usami, M. O. Kubo
wiley   +1 more source

X-Ray Study of Natural and Fossil Resins

open access: yes, 1930
This paper deals with the X-Ray Study of Natural and Fossil Resins ...
Mahadevan, C
core  

Pressure as driving force in the formation of Fossil Resins: Pressure Induced Changes in trans-Communic Acid studied by Raman Spectroscopy

open access: yes, 2017
The main purpose of this study is to provide spectroscopic evidence of possible chemical pathways in the formation of fossil resins under high pressure conditions.
Taravillo Corralo, Mercedes   +4 more
core   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

open access: yesThe Anatomical Record, EarlyView.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano   +3 more
wiley   +1 more source

Baltic amber and other fossil resins in the light of physicochemical studies

open access: yes, 2009
The paper presents some problems in the studies on Baltic amber (succinite) and other fossil resins. Natural resins form a large group of fossils already known from various parts of the world. However, they markedly differ in age and origin which creates
Matuszewska, A.
core  

The Geological-Evolutional Concept of Resin Genesis

open access: yes, 2018
Geological and evolutionary concept of the genesis of fossil resins: Fossil resins are a special group of natural organic compounds. The work is devoted to the determination of special features of formation, distribution, properties, composition of ...
Georgii I. Rudko   +1 more
core   +1 more source

The first extinct species of Leiestes Chevrolat (Coleoptera: Coccinelloidea: Endomychidae) from Baltic amber

open access: yes, 2022
A new extinct handsome fungus beetle species of the extant Palaearctic genus Leiestes Chevrolat, L. tomaszewskae Alekseev and Bukejs sp. nov., is described from the Baltic amber.
Kristaps Kairišs (11607201)   +2 more
core   +1 more source

Growth dynamics, skeletochronology, and histovariability of the theropod dinosaur Berthasaura leopoldinae

open access: yesThe Anatomical Record, EarlyView.
Osteohistological sampling on different bones of theropod dinosaur documents discrepant age record, growth, and metabolism. This could result unprecise paleobiological inferences if samplings are based on single bones. However, multi‐bone sampling can attenuate these discrepancies, helping to infer growth dynamics and physiology of these extinct ...
Geovane Alves de Souza   +3 more
wiley   +1 more source

Methods in the synthesis and conversion of 2,5-Bis-(hydroxylmethyl)furan from bio-derived 5-hydroxymethylfurfural and its great potential in polymerization

open access: yesBioResources, 2018
To meet increasing demands for alternatives to fossil-based chemicals, environment-friendly and renewable energy materials are of great importance. Biomass-derived 2,5-bis-(hydroxylmethyl)furan (BHMF) has the potential to partly substitute petroleum ...
Junhua Zhang   +5 more
doaj   +1 more source

Characterisation and Classification of fossil resins

open access: yes, 2004
Since the sixties there have been numerous works dealing with the classification of different types of amber based on spectroscopical data. Most of them were restricted to a visual inspection of the fingerprints or simple spectral comparisons.
Lühr, Christoph
core  

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