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Background: Potentilla anserina L. is rich in various nutrients, active ingredients and unique flavor, comprising a natural nutrition and health food. However, its application in aquatic food has been rarely reported. Therefore, the effects of Potentilla anserina L. powder (PAP) on gel properties and volatile flavor profile of silver carp surimi were investigated., Results: The gel strength and water-holding capacity of the surimi gels were significantly improved (P < 0.05), and the whiteness and cooking loss of all the samples decreased slightly with the increase in PAP content. The addition of PAP shortened the relaxation time (T 2 ) of the surimi gels and converted some of the free water into immobile or bound water, which resulted in a better immobilization of water in the surimi. Scanning electron microscopy images demonstrated that the network of surimi gels with PAP added was denser and had a smoother surface compared to the control. Volatile components (VCs) analysis showed that 33 VCs were identified in the surimi gel samples with different additions of PAP, among which aldehydes, alcohols and esters were the major VCs, accounting for more than 50% of the VCs in the surimi gels. PAP addition reduced the fishy and rancid flavor compounds in surimi gels, such as 1-propanol, 1-octen-3-ol, etc., and promoted the production of aldehydes, alcohols, esters and other flavor substances., Conclusion: These results of the present study provide theoretical support for the investigation and development of new nutrient-health-flavored surimi products. © 2024 Society of Chemical Industry., (© 2024 Society of Chemical Industry.)

Background: Fish protein is a good source of amino acids and peptides with sensory properties. Theoretically, the type of protein affects the taste quality of the protein hydrolysates. To better use fish protein in the food ingredients industry, an in silico approach was adopted to evaluate the potential of fish protein to release taste-active compounds., Results: Six types of protein from seven commercial fishes were screened from the Uniprot knowledge base. The results showed that a remarkable number of umami fragments presented in myosin and parvalbumin (PB), such as glutamic acid (Glu), aspartic acid (Asp), and Asp- and Glu- containing peptides, whereas sweet amino acids and bitter peptides (e.g., Pro- and Gly- containing peptides) were mainly found in collagen (CGI) in all fish samples. After the in silico proteolysis by papain, a difference in the profile of taste-active fragments was observed among the six types of proteins. Amino acids were the main hydrolysis products of these proteins, especially umami, sweet, and bitter amino acids, significantly contributing to the taste formation of protein hydrolysates. Besides, the myosin and CGI hydrolysates were abundant in taste active peptides both in types and quantities., Conclusion: Myosin is a promising protein source for producing umami fragments, and CGI seems to be a good precursor of sweet and bitter fragments. Different types of protein have an essential effect on the taste of protein hydrolysates. © 2022 Society of Chemical Industry., (© 2022 Society of Chemical Industry.)

This study aimed to investigate the effects of flavourzyme addition on protein degradation and flavor formation in grass carp during fermentation. The related results showed that the addition of flavourzyme reduced the moisture content and accelerated the hydrolysis of protein and generation of water‐soluble flavor substances (e.g., TCA‐soluble peptides, α‐amino nitrogen, and free amino acids), thereby contributing to fermented grass carp products with a better taste quality. Besides, radar map results of electronic tongue and electronic nose showed that flavourzyme addition gives fermented products a more intense umami taste and odor. Meanwhile, sensory evaluation results also further confirmed that the addition of flavourzyme significantly improved the sensory attributes of fermented grass carp products, especially the taste and odor attributes. Overall, flavourzyme addition may be an effective way to shorten fermentation time and improve the flavor quality of fermented grass carp products during fermentation. Practical Applications: In this study, to study the effects of flavourzyme addition on protein degradation and flavor formation in grass carp during fermentation, the related indicators include the moisture content, total nitrogen, non‐protein nitrogen, protein degradation index, TCA‐soluble peptides, α‐amino nitrogen, free amino acids, electronic tongue, electronic nose, and sensory attributes were analyzed. This study may provide some useful information for the improvement of fermentation methods and the production of high‐quality fermented grass carp products. [ABSTRACT FROM AUTHOR]

This study focused on the effect of different levels of l‐arabinose addition on the sensory quality and digestibility of silver carp sausage by testing color, texture, smell, taste, sensory score, and digestibility. The results showed that the L* value of fish sausage decreased with the increase of l‐arabinose, while a* value, b* value, and BI increased. In addition, the hardness, springiness, and chewiness of fish sausage reached the maximum when adding 2% l‐arabinose. Principal component analysis results of E‐nose and E‐tongue data showed that l‐arabinose enhanced the aroma and taste profiles. Sensory evaluation found that fish sausage with 2% l‐arabinose had the highest overall acceptability. Moreover, the addition of 2% arabinose could better maintain the protein digestibility of fish sausage intact. This study has suggested a promising potential for applying glycation in aquatic product processing and the development of nutritious ready‐to‐eat fish products using l‐arabinose. Novelty impact statement: This work investigates the impact of different levels of l‐arabinose addition on the color, texture, smell, taste, and digestibility of silver carp sausage. It explains how the change of glycation degree affects the sensory quality and digestibility of silver carp sausage. Fish sausage with good overall acceptability and digestibility was obtained by adding 2% l‐arabinose. This work contributes a theoretical basis for applying glycation in aquatic product processing and developing nutritious ready‐to‐eat fish products using l‐arabinose. [ABSTRACT FROM AUTHOR]

A 45‐day fattening trial was conducted using iso‐nitrogenous and iso‐fatty fattening diets, among which 0%, 25%, 50%, 75%, and 100% of fish oil were, respectively, replaced by blending vegetable oils (canola oil: soybean oil = 1:1), recorded as Diet 1 ~ Diet 5, respectively. The results showed that the meat of crabs (150 ± 25 g) cultured by five fattening feed were distinguished effectively with the electronic tongue. The total free amino acids and taste nucleotides in the meat of crab cultured by Diet 1 were higher than others. The contents of betaine (taste activity value <1) and umami amino acids in the meat of Diet 3 were highest. The contents of sweet amino acids in the meat of crab cultured by Diet 5 was the highest among the different diet. The equivalent umami concentration of Diet 1 was the highest, suggesting that the umami taste is better. In conclusion, 50% of fish oil could be replaced by vegetable oil in fattening feeds. Practical applications: This paper provided technical support for blending vegetable oils instead of fish oil in fattening feed for swimming crab by using electronic tongue, automatic amino acid analysis, and high performance liquid chromatography to research the changes in the contents of free amino acids, nucleotides, and betaine in female meat of swimming crab, and the taste impacts were evaluated by taste activity values and equivalent umami concentration methods. [ABSTRACT FROM AUTHOR]

In this study, the quality changes of grass carp fillets dried by microwave‐hot‐air combined drying under different microwave time were investigated. The salted fillets were dried at 385 W microwave with different time (0, 2, 4, 6, 8, and 10 min), followed by 65℃ hot air to the end. The quality of fillets was evaluated by drying time, color, hardness, rehydration ratio, and taste characteristics (ATP‐related compounds, free amino acids, E‐tongue taste profile, EUC, and TAV). Results showed that grass carp fillets dried by microwave‐hot‐air combined drying had better qualities compared with single hot‐air drying. Besides, microwave time had obvious effects on the quality changes of grass carp fillets, and 6 min was considered as the optimal drying time. [ABSTRACT FROM AUTHOR]

This study was aimed at to investigate the quality changes of grass carp during short‐term starvation. The pH, lactic acid, free amino acid, and adenosine triphosphate‐related compounds of dorsal meat, belly meat and red meat in grass carp were measured during starvation for 6 days, and the quality of grass carp was evaluated by K value, equivalent umami concentration (EUC), taste activity value (TAV), and electronic tongue. The pH of three parts meat reached the maximum value on the fourth day, which was closely related to the lactic acid content. Concurrently, the contents of fresh sweet amino acids were higher on the fourth day in all parts. The K values in dorsal meat and belly meat were below 10% during starvation. Considering the overall results of electronic tongue, EUC, and TAV analysis, it is suggested that grass carp should be marketed and eaten with a starvation period of 2–4 days for best taste and quality. [ABSTRACT FROM AUTHOR]

The flavor of gonad and meat of female Portunus Trituberculatus cultured in indoor and outdoor were studied by tested free amino acid, taste nucleotide, volatile compounds, and analyzed combined with sensory, electronic nose, and electronic tongue results. The results of electronic nose, electronic tongue, and sensory showed that the flavor were slightly different under two conditions. For taste substance, indoor culture can significantly increase the contribution of AMP, glutamate, alanine, proline to the taste and the content of TAA and EAA of gonad. Also, it could significantly increase the contribution of AMP, lysine, and histidine and the content of EAA of meat, while the TAA and FAA were adverse (p < 0.05). The equivalent umami concentration value of gonad and meat were higher than outdoor cultured. For volatile compounds, the content of aldehydes, ketones, and furans in gonad and meat were decreased by indoor culture, but others were increased. Practical applications: At present, many scholars have studied the effects of culture methods and conditions, including temperature, region, salinity, feed, etc. On the growth and development of Portunus Trituberculatus, some studies have studied the effects of free amino acids on their flavors, but few have reported the influences of culture methods and conditions on the overall flavor of the Portunus Trituberculatus. In this study, we explored the overall flavor of indoor and outdoor breeding of the gonads and crab meat of the Portunus Trituberculatus by the sensory evaluation analysis, volatile substance analysis, free amino acid, and taste nucleotide analysis, combined with electronic tongue and electronic nose analysis, provides a certain theoretical reference to the swimming crab pond aquaculture industry. [ABSTRACT FROM AUTHOR]