Hydrodynamic Properties of Gelatin - Studies from Intrinsic Viscosity Measurements

Masuelli, Martin Alberto; Sansone, Maria Gabriela

doi:10.5772/34401

Cited by 9 publications

(5 citation statements)

References 76 publications

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“…The molecular weight was calculated by applying the Mark–Houwink–Sakurada equation [ η ] = k ( M w ) a where M w is the molecular weight, and k and a are the Mark–Houwink–Sakurada parameters, which were found to be k = 0.1614 cm 3 /g and a = 0.8198, yielding an intrinsic viscosity of [η] = 29.03 cm 3 /g and a molecular weight of M w = 563.2 g/mol. The molecular weight of this gelatin is similar to the one reported by Masuelli and Sansone …”

Section: Resultssupporting

confidence: 88%

Properties of Freeze-Dried Gelatin/Clay Aerogel Composites Crosslinked with Tannic Acid

De la Cruz,

Abt,

León

et al. 2023

ACS Appl. Polym. Mater.

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Polymer-based aerogels are tough, low-density, and thermally insulating materials currently receiving increasing attention. In this work, robust all-natural aerogel composites have been obtained by incorporating nanoscale montmorillonite and tannic acid into a gelatin matrix via freeze-drying. The prepared aerogels exhibited low densities, good compressive properties, and low thermal conductivities. The significant improvement in the thermomechanical properties results from the strong bonding between gelatin and tannic acid. Under fire, the systems exhibited excellent flame retardancy with reduced thermal degradation rate and cone calorimeter burning parameters. A straightforward surface treatment with polydimethylsiloxane gave the aerogels exceptional and durable superhydrophobicity. These multifunctional composite aerogels are considered promising eco-friendly alternatives to synthetic polymer-based foams.

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Section: Resultssupporting

confidence: 88%

Properties of Freeze-Dried Gelatin/Clay Aerogel Composites Crosslinked with Tannic Acid

De la Cruz,

Abt,

León

et al. 2023

ACS Appl. Polym. Mater.

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“…However, plasma viscosity is determined by water content and macromolecular components. Few theoretical considerations describe protein shape, pH, and temperature as viscosity modifiers 34 . Molecular weight, protein conformation, and interactions between different proteins or protein solvent may influence plasma viscosity values in a way that cannot be fully described by protein concentration alone.…”

Section: Discussionmentioning

confidence: 99%

Perioperative trajectory of plasma viscosity: A prospective, observational, exploratory study in cardiac surgery

et al. 2022

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Objective Plasma viscosity is one of the critical factors that regulate microcirculatory flow but has received scant research attention. The main objective of this study was to evaluate plasma viscosity in cardiac surgery with respect to perioperative trajectory, main determinants, and impact on outcome. Methods Prospective, single center, observational study, including 50 adult patients undergoing cardiac surgery with cardiopulmonary bypass between February 1, 2020 and May 31, 2021. Clinical perioperative characteristics, short term outcome, standard blood analysis, plasma viscosity, total proteins, and fibrinogen concentrations were recorded at 10 distinct time points during the first perioperative week. Results The longitudinal analysis showed that plasma viscosity is strongly influenced by proteins and measurement time points. Plasma viscosity showed a coefficient of variation of 11.3 ± 1.08 for EDTA and 12.1 ± 2.1 for citrate, similarly to total proteins and hemoglobin, but significantly lower than fibrinogen (p < .001). Plasma viscosity had lower percentage changes compared to hemoglobin (RANOVA, p < .001), fibrinogen (RANOVA, p < .001), and total proteins (RANOVA, p < .001). The main determinant of plasma viscosity was protein concentrations. No association with outcome was found, but the study may have been underpowered to detect it. Conclusion Plasma viscosity had a low coefficient of variation and low perioperative changes, suggesting tight regulation. Studies linking plasma viscosity with outcome would require large patient cohorts.

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“…The analysis of the viscosity of protein water solutions is mostly influenced by the analytes' temperatures and concentrations; at the same time, it also depends on not only factors that are only linked to the analyte characteristics, such as molecular weight (MW) [31] and amino acid profile, but also on ambient factors [32] like the extraction process and the pH.…”

Section: Dynamic Viscosity (Mpa•s)mentioning

confidence: 99%

Feasibility of Enzymatic Protein Extraction from a Dehydrated Fish Biomass Obtained from Unsorted Canned Yellowfin Tuna Side Streams: Part II

Grasso,

Méndez Paz,

Vázquez Sobrado

et al. 2024

Gels

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The enzymatic extraction of proteins from fish biomasses is being widely investigated. However, little or almost no research has paid attention to the exploitation of unsorted fishery biomasses. This work is part of a larger study, Part I of which has already been published, and focuses on an extensive characterization of two collagenous samples, namely gelatin (G) and hydrolyzed gelatin peptides (HGPs), extracted from a dehydrated fish biomass coming from unsorted canned yellowfin tuna side streams. The results indicate crude protein fractions of 90–93%, pH values between 3 and 5, white–yellow colors, collagen-like FTIR spectra, and 17% in terms of total amino acid content. Viscosity and the study of dynamic viscous–elastic behavior were analyzed. Thermo-gravimetric analysis was performed to assess the residual ashes. Both samples were investigated to determine their molecular weight distribution via size-exclusion chromatography, with a higher total average molecular weight for G compared to HGPs, with values of 17,265.5 Da and 2637.5 Da, respectively. G demonstrated technological properties similar to analogous marine gelatins. HGPs demonstrated antioxidant activity as per FRAP assay. All the results open up new perspectives for the potential use of these substances in biodegradable packaging, dietary supplements, and skin care cosmetics.

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Hydrodynamic Properties of Gelatin - Studies from Intrinsic Viscosity Measurements

Cited by 9 publications

References 76 publications

Properties of Freeze-Dried Gelatin/Clay Aerogel Composites Crosslinked with Tannic Acid

Properties of Freeze-Dried Gelatin/Clay Aerogel Composites Crosslinked with Tannic Acid

Perioperative trajectory of plasma viscosity: A prospective, observational, exploratory study in cardiac surgery

Feasibility of Enzymatic Protein Extraction from a Dehydrated Fish Biomass Obtained from Unsorted Canned Yellowfin Tuna Side Streams: Part II

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