Results 131 to 140 of about 35,975 (303)

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

The 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, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source

Birefringence of Nematic Liquid Crystals

, 1966
A theory of the birefringence of nematic liquid crystals is developed assuming the intermolecular interactions to be of the dipole-dipole type.
Krishnamurti, D., Chandrasekhar, S.
core   +1 more source

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

The 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, Marina Bento Soares, Luiz Carlos Weinschütz, Alexander Wilhelm Armin Kellner   +3 more
wiley   +1 more source

Birefringence in Gas-Assisted Injection Moldings: Contribution of Thermal Birefringence

, 2009
Various components of birefringence in polystyrene (PS) and polycarbonate (PC) tubular moldings, obtained by gas-assisted injection molding (GAIM), are measured and simulated considering both flow- and thermally induced stresses.
Isayev, Avraam
core  

Birefringence Tomography

Label-free optical imaging is a noninvasive way to study the natural structure of cells, tissues, and materials. One optical phenomenon that enables label-free imaging is birefringence, which arises from anisotropic variations in refractive index due to ...
Anderberg, Geneva
core   +1 more source

Differences in predominant collagen fiber orientation between dorsal and plantar trabecular bone tracts of adult mule deer calcanei suggest strain‐mode‐specific adaptation

The Anatomical Record, EarlyView.
Polarized microscopic images of the outer bone cortex (a and b) and deeper trabecular bone (c and d) of the deer calcaneus in thin cross‐sections. The brighter gray levels reflect more oblique‐to‐transverse collagen fibers in the compression/dorsal bone (a, c) and the darker gray levels reflect more longitudinal collagen in the tension/plantar bone (b,
John G. Skedros, John T. Cronin, Chad S. Mears, Brett W. Richards   +3 more
wiley   +1 more source

Characterization of the extracellular matrix from human and dog umbilical cords

The Anatomical Record, EarlyView.
Abstract The extracellular matrix is important for maintaining tissue morphogenesis and homeostasis; it can also be used as a biomaterial for the production of biological scaffolds. Particularly, the umbilical cord has shown potential in the production of scaffolds for small‐diameter vessels.
Ana Carla Mendonça, Roberta Losi Guembarovski, Carlos Alberto Miqueloto, Alda Fiorina Maria Losi Guembarovski, Caio Garcia Barbosa da Silva, Laís Capelasso Lucas Pinheiro, Phelipe Oliveira Favaron   +6 more
wiley   +1 more source

Tissue-like phantoms for quantitative birefringence imaging

, 2017
Birefringence imaging, including polarization sensitive optical coherence tomography (PS-OCT), can provide valuable insight into the microscopic structure and organization of many biological tissues.
Liu, Linbo, Brett E. Bouma, Liu, L. B., Martin Villiger, Kathy Beaudette, Bouma, B. E., Liu, X. Y., Wang, X. H., Liu, Xinyu, Xianghong Wang, Villiger, M., Linbo Liu, Xinyu Liu, Villiger, Martin, Beaudette, Kathy, Wang, Xianghong, Bouma, Brett E.   +16 more
core   +1 more source

Morphological Control of Aurophilic Chains of Gold(I) Dithiolate Dimers With Alkali and Alkali Earth Cations

Chemistry – A European Journal, EarlyView.
Luminescent coordination polymers of Group 1 (Li, K, Cs) and 2 (Mg─Ba) cations with gold(I) iso‐maleonitriledithiolate ({Au2[S2C = C(CN)2]}2−) units were prepared; 1‐D aurophilic chains are present in all cases. The structures strongly depend on cation charge and size, with N‐cyano coordination observed in the Gp 1 and larger Gp 2 cations. Increasingly
Jefferson A. Pells, William W. L. Ho, Daniel B. Leznoff   +2 more
wiley   +1 more source

Fhod3 in zebrafish supports myofibril stability during growth of embryonic skeletal muscle

Developmental Dynamics, EarlyView.
Abstract Background Actin filament organization in cardiomyocytes critically depends on the formin Fhod3, but a role for Fhod3 in skeletal muscle development has not yet been described. Results We demonstrate here that in zebrafish mutated for one of two fhod3 paralog genes, fhod3a, skeletal muscle of the trunk appears normal through 2 days post ...
Aubrie Russell, Tracy Eng, Jeffrey D. Amack, David Pruyne   +3 more
wiley   +1 more source