Effect of setting on the gelling properties of a protein concentrate from giant squid ( Dosidicus gigas) mantle

Abstract Different studies on obtaining protein concentrates or surimi from giant squid ( Dosidicus gigas) have reported that soft gels are obtained in comparison with other fish species. Therefore, the aim of this research was to investigate the effect of the setting (30 and 60 °C, for 0, 30, 60, and 90 min) on the gelling capacity as a possible alternative to improve the textural characteristics of the gels. Treatments at 60 °C (G4, G5, and G6) had a higher percentage of insoluble protein, while the electrophoretic profile showed the presence of high molecular weight (HMW) aggregates, as well as the decrease of myosin, paramyosin and actin bands as the incubation time was increased. Likewise, these systems presented a lower content of total sulfhydryl (TSH), which is attributed to the formation of disulfide bridges. The texture profile analysis (TPA) showed that the setting application affected the different parameters evaluated (strength, elasticity, and cohesiveness). Setting as pretreatment did not prove to be a good alternative for the gelling of proteins from giant squid mantle, since the control treatment (no setting) was that which exhibited better textural characteristics

Effect of Different Polyalcohols as Plasticizers on the Functional Properties of Squid Protein Film (<i>Dosidicus Gigas</i>)

Conventional plastic materials accumulation has led to a constant search to develop friendly packaging, edible coatings from biopolymers are an example. Since different proteins have different behavior and plastizicer compatibility, in this work, the effect of different polyalcohols (glycerol, sorbitol, maltitol, mannitol, and xylitol) as plasticizers on squid protein films behavior was studied. The results show that except for mannitol, transparent, and flexible films can be obtained. None of them showed transmission to light on the ultraviolet (UV) spectrum. However, only glycerol and sorbitol were sufficiently flexible to evaluate their mechanical properties, in which glycerol had a more elastic behavior with an elongation at a break of 920% and tensile strength (TS) of 0.94 MPa, while sorbitol exhibited a more plastic behavior with an elongation at break of 511% and a TS of 4.41 MPa. Water-vapor transmission rate was higher in glycerol, with 194.41 g&#183;m&#8722;2d&#8722;1, while sorbitol had 44.27 g&#183;m&#8722;2d&#8722;1 but presented blooming. This could be due to low interaction between sorbitol and the protein matrix, correlating with the film-solubility results. Amide I band of the Fourier transform infrared (FT-IR) spectra demonstrated higher denaturation and loss of alpha helical structure in glycerol film, followed by maltitol/sorbitol, xylitol, mannitol, and the control film. This in accordance with thermogravimetric analysis (TGA) results. The results of this study prove that only glycerol and sorbitol are suitable to obtain a see-through flexible film

Effect of setting on the gelling properties of a protein concentrate from giant squid ( Dosidicus gigas) mantle

<div><p>Abstract Different studies on obtaining protein concentrates or surimi from giant squid ( Dosidicus gigas) have reported that soft gels are obtained in comparison with other fish species. Therefore, the aim of this research was to investigate the effect of the setting (30 and 60 °C, for 0, 30, 60, and 90 min) on the gelling capacity as a possible alternative to improve the textural characteristics of the gels. Treatments at 60 °C (G4, G5, and G6) had a higher percentage of insoluble protein, while the electrophoretic profile showed the presence of high molecular weight (HMW) aggregates, as well as the decrease of myosin, paramyosin and actin bands as the incubation time was increased. Likewise, these systems presented a lower content of total sulfhydryl (TSH), which is attributed to the formation of disulfide bridges. The texture profile analysis (TPA) showed that the setting application affected the different parameters evaluated (strength, elasticity, and cohesiveness). Setting as pretreatment did not prove to be a good alternative for the gelling of proteins from giant squid mantle, since the control treatment (no setting) was that which exhibited better textural characteristics.</p></div

Abstract 171: Embolization of non‐ruptured intracranial aneurysms with flow diverter devices in Mexico: Quick responses

Introduction Flow diverters (FD) are stent‐type devices that enable the exclusion of intracranial aneurysms in clinical scenarios where coil‐type devices exhibit high failure rates. However, its effectiveness hasn't been examined in countries with low and middle incomes, like Mexico. Methods Longitudinal, retrospective study of the patients who received care at a tertiary center between November 2020 and April 2022. Adults older than 18 with non‐ruptured intracranial aneurysms were included. After treatment with FD, post‐procedure control angiograms were performed between three and six months later. The occlusion rate was evaluated using the O'Kelly‐Marotta scale. Results There were 23 patients —2 of whom had double aneurisms—, 20 women, with an average age of 51.4 years (±13.3). 19 saccular aneurysms, 4 fusiform aneurysms, and 2 dissecting aneurysms were treated. Neck measurements were in the range of 1.9 to 19 mm. Angioplasties were performed as part of the procedure on four patients, and successful liberation was achieved in all procedures. Between three and six months of follow up, total occlusion was observed in 14 aneurisms, and three had less than 5% residuals. Only three late procedural related complications were found. Conclusion The patients treated with FD at our reference center had complex aneurysms. Complete occlusion was achieved in 56% of the treated aneurysms during follow up. The use of the FD appears to be safe and to have a high level of effectiveness, similar to what has been described in international reports