Insights into the palaeoenvironments, structure and stratigraphy  of the lower Miocene of the Eastern Carpathians Bend Zone, Romania

BERCEA, Răzvan-Ionuț; Bălc, Ramona; TĂMAȘ, Alexandra; FILIPESCU, Sorin; TĂMAȘ, Dan Mircea; GUILLONG, Marcel; SZEKELY1, Szabolcs Flavius; LUKÁCS, Réka

doi:10.7306/gq.1673

Cited by 2 publications

(2 citation statements)

References 61 publications

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“…Figure 4 shows the rheological data for hybrid hydrogels composed of polymers and proteins [ 93 , 98 ], both methods presented above were used. In continuous shear experiments, yield stress was determined as the shear stress at which the viscosity suddenly changes its dependence on shear stress ( Figure 4 a).…”

Section: Rheological Parameters As Key Characteristics For Extrusion-...mentioning

confidence: 99%

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Rheology as a Tool for Fine-Tuning the Properties of Printable Bioinspired Gels

Bercea¹

2023

Molecules

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Over the last decade, efforts have been oriented toward the development of suitable gels for 3D printing, with controlled morphology and shear-thinning behavior in well-defined conditions. As a multidisciplinary approach to the fabrication of complex biomaterials, 3D bioprinting combines cells and biocompatible materials, which are subsequently printed in specific shapes to generate 3D structures for regenerative medicine or tissue engineering. A major interest is devoted to the printing of biomimetic materials with structural fidelity after their fabrication. Among some requirements imposed for bioinks, such as biocompatibility, nontoxicity, and the possibility to be sterilized, the nondamaging processability represents a critical issue for the stability and functioning of the 3D constructs. The major challenges in the field of printable gels are to mimic at different length scales the structures existing in nature and to reproduce the functions of the biological systems. Thus, a careful investigation of the rheological characteristics allows a fine-tuning of the material properties that are manufactured for targeted applications. The fluid-like or solid-like behavior of materials in conditions similar to those encountered in additive manufacturing can be monitored through the viscoelastic parameters determined in different shear conditions. The network strength, shear-thinning, yield point, and thixotropy govern bioprintability. An assessment of these rheological features provides significant insights for the design and characterization of printable gels. This review focuses on the rheological properties of printable bioinspired gels as a survey of cutting-edge research toward developing printed materials for additive manufacturing.

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Section: Rheological Parameters As Key Characteristics For Extrusion-...mentioning

confidence: 99%

“…Two hydrogels were considered for this discussion: sample 1 contains 30% BSA and 70% polymer and sample 2 is composed of 70% BSA and 30% polymer. The polymer is a mixture containing 25% pullulan and 75% PVA [ 98 ].…”

Section: Rheological Parameters As Key Characteristics For Extrusion-...mentioning

confidence: 99%